box2d-demo

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backbone.js

//     Backbone.js 0.9.2

//     (c) 2010-2012 Jeremy Ashkenas, DocumentCloud Inc.
//     Backbone may be freely distributed under the MIT license.
//     For all details and documentation:
//     http://backbonejs.org

(function(){

  // Initial Setup
  // -------------

  // Save a reference to the global object (`window` in the browser, `global`
  // on the server).
  var root = this;

  // Save the previous value of the `Backbone` variable, so that it can be
  // restored later on, if `noConflict` is used.
  var previousBackbone = root.Backbone;

  // Create a local reference to slice/splice.
  var slice = Array.prototype.slice;
  var splice = Array.prototype.splice;

  // The top-level namespace. All public Backbone classes and modules will
  // be attached to this. Exported for both CommonJS and the browser.
  var Backbone;
  if (typeof exports !== 'undefined') {
    Backbone = exports;
  } else {
    Backbone = root.Backbone = {};
  }

  // Current version of the library. Keep in sync with `package.json`.
  Backbone.VERSION = '0.9.2';

  // Require Underscore, if we're on the server, and it's not already present.
  var _ = root._;
  if (!_ && (typeof require !== 'undefined')) _ = require('underscore');

  // For Backbone's purposes, jQuery, Zepto, or Ender owns the `$` variable.
  var $ = root.jQuery || root.Zepto || root.ender;

  // Set the JavaScript library that will be used for DOM manipulation and
  // Ajax calls (a.k.a. the `$` variable). By default Backbone will use: jQuery,
  // Zepto, or Ender; but the `setDomLibrary()` method lets you inject an
  // alternate JavaScript library (or a mock library for testing your views
  // outside of a browser).
  Backbone.setDomLibrary = function(lib) {
    $ = lib;
  };

  // Runs Backbone.js in *noConflict* mode, returning the `Backbone` variable
  // to its previous owner. Returns a reference to this Backbone object.
  Backbone.noConflict = function() {
    root.Backbone = previousBackbone;
    return this;
  };

  // Turn on `emulateHTTP` to support legacy HTTP servers. Setting this option
  // will fake `"PUT"` and `"DELETE"` requests via the `_method` parameter and
  // set a `X-Http-Method-Override` header.
  Backbone.emulateHTTP = false;

  // Turn on `emulateJSON` to support legacy servers that can't deal with direct
  // `application/json` requests ... will encode the body as
  // `application/x-www-form-urlencoded` instead and will send the model in a
  // form param named `model`.
  Backbone.emulateJSON = false;

  // Backbone.Events
  // -----------------

  // Regular expression used to split event strings
  var eventSplitter = /\s+/;

  // A module that can be mixed in to *any object* in order to provide it with
  // custom events. You may bind with `on` or remove with `off` callback functions
  // to an event; trigger`-ing an event fires all callbacks in succession.
  //
  //     var object = {};
  //     _.extend(object, Backbone.Events);
  //     object.on('expand', function(){ alert('expanded'); });
  //     object.trigger('expand');
  //
  var Events = Backbone.Events = {

    // Bind one or more space separated events, `events`, to a `callback`
    // function. Passing `"all"` will bind the callback to all events fired.
    on: function(events, callback, context) {

      var calls, event, node, tail, list;
      if (!callback) return this;
      events = events.split(eventSplitter);
      calls = this._callbacks || (this._callbacks = {});

      // Create an immutable callback list, allowing traversal during
      // modification.  The tail is an empty object that will always be used
      // as the next node.
      while (event = events.shift()) {
        list = calls[event];
        node = list ? list.tail : {};
        node.next = tail = {};
        node.context = context;
        node.callback = callback;
        calls[event] = {tail: tail, next: list ? list.next : node};
      }

      return this;
    },

    // Remove one or many callbacks. If `context` is null, removes all callbacks
    // with that function. If `callback` is null, removes all callbacks for the
    // event. If `events` is null, removes all bound callbacks for all events.
    off: function(events, callback, context) {
      var event, calls, node, tail, cb, ctx;

      // No events, or removing *all* events.
      if (!(calls = this._callbacks)) return;
      if (!(events || callback || context)) {
        delete this._callbacks;
        return this;
      }

      // Loop through the listed events and contexts, splicing them out of the
      // linked list of callbacks if appropriate.
      events = events ? events.split(eventSplitter) : _.keys(calls);
      while (event = events.shift()) {
        node = calls[event];
        delete calls[event];
        if (!node || !(callback || context)) continue;
        // Create a new list, omitting the indicated callbacks.
        tail = node.tail;
        while ((node = node.next) !== tail) {
          cb = node.callback;
          ctx = node.context;
          if ((callback && cb !== callback) || (context && ctx !== context)) {
            this.on(event, cb, ctx);
          }
        }
      }

      return this;
    },

    // Trigger one or many events, firing all bound callbacks. Callbacks are
    // passed the same arguments as `trigger` is, apart from the event name
    // (unless you're listening on `"all"`, which will cause your callback to
    // receive the true name of the event as the first argument).
    trigger: function(events) {
      var event, node, calls, tail, args, all, rest;
      if (!(calls = this._callbacks)) return this;
      all = calls.all;
      events = events.split(eventSplitter);
      rest = slice.call(arguments, 1);

      // For each event, walk through the linked list of callbacks twice,
      // first to trigger the event, then to trigger any `"all"` callbacks.
      while (event = events.shift()) {
        if (node = calls[event]) {
          tail = node.tail;
          while ((node = node.next) !== tail) {
            node.callback.apply(node.context || this, rest);
          }
        }
        if (node = all) {
          tail = node.tail;
          args = [event].concat(rest);
          while ((node = node.next) !== tail) {
            node.callback.apply(node.context || this, args);
          }
        }
      }

      return this;
    }

  };

  // Aliases for backwards compatibility.
  Events.bind   = Events.on;
  Events.unbind = Events.off;

  // Backbone.Model
  // --------------

  // Create a new model, with defined attributes. A client id (`cid`)
  // is automatically generated and assigned for you.
  var Model = Backbone.Model = function(attributes, options) {
    var defaults;
    attributes || (attributes = {});
    if (options && options.parse) attributes = this.parse(attributes);
    if (defaults = getValue(this, 'defaults')) {
      attributes = _.extend({}, defaults, attributes);
    }
    if (options && options.collection) this.collection = options.collection;
    this.attributes = {};
    this._escapedAttributes = {};
    this.cid = _.uniqueId('c');
    this.changed = {};
    this._silent = {};
    this._pending = {};
    this.set(attributes, {silent: true});
    // Reset change tracking.
    this.changed = {};
    this._silent = {};
    this._pending = {};
    this._previousAttributes = _.clone(this.attributes);
    this.initialize.apply(this, arguments);
  };

  // Attach all inheritable methods to the Model prototype.
  _.extend(Model.prototype, Events, {

    // A hash of attributes whose current and previous value differ.
    changed: null,

    // A hash of attributes that have silently changed since the last time
    // `change` was called.  Will become pending attributes on the next call.
    _silent: null,

    // A hash of attributes that have changed since the last `'change'` event
    // began.
    _pending: null,

    // The default name for the JSON `id` attribute is `"id"`. MongoDB and
    // CouchDB users may want to set this to `"_id"`.
    idAttribute: 'id',

    // Initialize is an empty function by default. Override it with your own
    // initialization logic.
    initialize: function(){},

    // Return a copy of the model's `attributes` object.
    toJSON: function(options) {
      return _.clone(this.attributes);
    },

    // Get the value of an attribute.
    get: function(attr) {
      return this.attributes[attr];
    },

    // Get the HTML-escaped value of an attribute.
    escape: function(attr) {
      var html;
      if (html = this._escapedAttributes[attr]) return html;
      var val = this.get(attr);
      return this._escapedAttributes[attr] = _.escape(val == null ? '' : '' + val);
    },

    // Returns `true` if the attribute contains a value that is not null
    // or undefined.
    has: function(attr) {
      return this.get(attr) != null;
    },

    // Set a hash of model attributes on the object, firing `"change"` unless
    // you choose to silence it.
    set: function(key, value, options) {
      var attrs, attr, val;

      // Handle both `"key", value` and `{key: value}` -style arguments.
      if (_.isObject(key) || key == null) {
        attrs = key;
        options = value;
      } else {
        attrs = {};
        attrs[key] = value;
      }

      // Extract attributes and options.
      options || (options = {});
      if (!attrs) return this;
      if (attrs instanceof Model) attrs = attrs.attributes;
      if (options.unset) for (attr in attrs) attrs[attr] = void 0;

      // Run validation.
      if (!this._validate(attrs, options)) return false;

      // Check for changes of `id`.
      if (this.idAttribute in attrs) this.id = attrs[this.idAttribute];

      var changes = options.changes = {};
      var now = this.attributes;
      var escaped = this._escapedAttributes;
      var prev = this._previousAttributes || {};

      // For each `set` attribute...
      for (attr in attrs) {
        val = attrs[attr];

        // If the new and current value differ, record the change.
        if (!_.isEqual(now[attr], val) || (options.unset && _.has(now, attr))) {
          delete escaped[attr];
          (options.silent ? this._silent : changes)[attr] = true;
        }

        // Update or delete the current value.
        options.unset ? delete now[attr] : now[attr] = val;

        // If the new and previous value differ, record the change.  If not,
        // then remove changes for this attribute.
        if (!_.isEqual(prev[attr], val) || (_.has(now, attr) != _.has(prev, attr))) {
          this.changed[attr] = val;
          if (!options.silent) this._pending[attr] = true;
        } else {
          delete this.changed[attr];
          delete this._pending[attr];
        }
      }

      // Fire the `"change"` events.
      if (!options.silent) this.change(options);
      return this;
    },

    // Remove an attribute from the model, firing `"change"` unless you choose
    // to silence it. `unset` is a noop if the attribute doesn't exist.
    unset: function(attr, options) {
      (options || (options = {})).unset = true;
      return this.set(attr, null, options);
    },

    // Clear all attributes on the model, firing `"change"` unless you choose
    // to silence it.
    clear: function(options) {
      (options || (options = {})).unset = true;
      return this.set(_.clone(this.attributes), options);
    },

    // Fetch the model from the server. If the server's representation of the
    // model differs from its current attributes, they will be overriden,
    // triggering a `"change"` event.
    fetch: function(options) {
      options = options ? _.clone(options) : {};
      var model = this;
      var success = options.success;
      options.success = function(resp, status, xhr) {
        if (!model.set(model.parse(resp, xhr), options)) return false;
        if (success) success(model, resp);
      };
      options.error = Backbone.wrapError(options.error, model, options);
      return (this.sync || Backbone.sync).call(this, 'read', this, options);
    },

    // Set a hash of model attributes, and sync the model to the server.
    // If the server returns an attributes hash that differs, the model's
    // state will be `set` again.
    save: function(key, value, options) {
      var attrs, current;

      // Handle both `("key", value)` and `({key: value})` -style calls.
      if (_.isObject(key) || key == null) {
        attrs = key;
        options = value;
      } else {
        attrs = {};
        attrs[key] = value;
      }
      options = options ? _.clone(options) : {};

      // If we're "wait"-ing to set changed attributes, validate early.
      if (options.wait) {
        if (!this._validate(attrs, options)) return false;
        current = _.clone(this.attributes);
      }

      // Regular saves `set` attributes before persisting to the server.
      var silentOptions = _.extend({}, options, {silent: true});
      if (attrs && !this.set(attrs, options.wait ? silentOptions : options)) {
        return false;
      }

      // After a successful server-side save, the client is (optionally)
      // updated with the server-side state.
      var model = this;
      var success = options.success;
      options.success = function(resp, status, xhr) {
        var serverAttrs = model.parse(resp, xhr);
        if (options.wait) {
          delete options.wait;
          serverAttrs = _.extend(attrs || {}, serverAttrs);
        }
        if (!model.set(serverAttrs, options)) return false;
        if (success) {
          success(model, resp);
        } else {
          model.trigger('sync', model, resp, options);
        }
      };

      // Finish configuring and sending the Ajax request.
      options.error = Backbone.wrapError(options.error, model, options);
      var method = this.isNew() ? 'create' : 'update';
      var xhr = (this.sync || Backbone.sync).call(this, method, this, options);
      if (options.wait) this.set(current, silentOptions);
      return xhr;
    },

    // Destroy this model on the server if it was already persisted.
    // Optimistically removes the model from its collection, if it has one.
    // If `wait: true` is passed, waits for the server to respond before removal.
    destroy: function(options) {
      options = options ? _.clone(options) : {};
      var model = this;
      var success = options.success;

      var triggerDestroy = function() {
        model.trigger('destroy', model, model.collection, options);
      };

      if (this.isNew()) {
        triggerDestroy();
        return false;
      }

      options.success = function(resp) {
        if (options.wait) triggerDestroy();
        if (success) {
          success(model, resp);
        } else {
          model.trigger('sync', model, resp, options);
        }
      };

      options.error = Backbone.wrapError(options.error, model, options);
      var xhr = (this.sync || Backbone.sync).call(this, 'delete', this, options);
      if (!options.wait) triggerDestroy();
      return xhr;
    },

    // Default URL for the model's representation on the server -- if you're
    // using Backbone's restful methods, override this to change the endpoint
    // that will be called.
    url: function() {
      var base = getValue(this, 'urlRoot') || getValue(this.collection, 'url') || urlError();
      if (this.isNew()) return base;
      return base + (base.charAt(base.length - 1) == '/' ? '' : '/') + encodeURIComponent(this.id);
    },

    // **parse** converts a response into the hash of attributes to be `set` on
    // the model. The default implementation is just to pass the response along.
    parse: function(resp, xhr) {
      return resp;
    },

    // Create a new model with identical attributes to this one.
    clone: function() {
      return new this.constructor(this.attributes);
    },

    // A model is new if it has never been saved to the server, and lacks an id.
    isNew: function() {
      return this.id == null;
    },

    // Call this method to manually fire a `"change"` event for this model and
    // a `"change:attribute"` event for each changed attribute.
    // Calling this will cause all objects observing the model to update.
    change: function(options) {
      options || (options = {});
      var changing = this._changing;
      this._changing = true;

      // Silent changes become pending changes.
      for (var attr in this._silent) this._pending[attr] = true;

      // Silent changes are triggered.
      var changes = _.extend({}, options.changes, this._silent);
      this._silent = {};
      for (var attr in changes) {
        this.trigger('change:' + attr, this, this.get(attr), options);
      }
      if (changing) return this;

      // Continue firing `"change"` events while there are pending changes.
      while (!_.isEmpty(this._pending)) {
        this._pending = {};
        this.trigger('change', this, options);
        // Pending and silent changes still remain.
        for (var attr in this.changed) {
          if (this._pending[attr] || this._silent[attr]) continue;
          delete this.changed[attr];
        }
        this._previousAttributes = _.clone(this.attributes);
      }

      this._changing = false;
      return this;
    },

    // Determine if the model has changed since the last `"change"` event.
    // If you specify an attribute name, determine if that attribute has changed.
    hasChanged: function(attr) {
      if (!arguments.length) return !_.isEmpty(this.changed);
      return _.has(this.changed, attr);
    },

    // Return an object containing all the attributes that have changed, or
    // false if there are no changed attributes. Useful for determining what
    // parts of a view need to be updated and/or what attributes need to be
    // persisted to the server. Unset attributes will be set to undefined.
    // You can also pass an attributes object to diff against the model,
    // determining if there *would be* a change.
    changedAttributes: function(diff) {
      if (!diff) return this.hasChanged() ? _.clone(this.changed) : false;
      var val, changed = false, old = this._previousAttributes;
      for (var attr in diff) {
        if (_.isEqual(old[attr], (val = diff[attr]))) continue;
        (changed || (changed = {}))[attr] = val;
      }
      return changed;
    },

    // Get the previous value of an attribute, recorded at the time the last
    // `"change"` event was fired.
    previous: function(attr) {
      if (!arguments.length || !this._previousAttributes) return null;
      return this._previousAttributes[attr];
    },

    // Get all of the attributes of the model at the time of the previous
    // `"change"` event.
    previousAttributes: function() {
      return _.clone(this._previousAttributes);
    },

    // Check if the model is currently in a valid state. It's only possible to
    // get into an *invalid* state if you're using silent changes.
    isValid: function() {
      return !this.validate(this.attributes);
    },

    // Run validation against the next complete set of model attributes,
    // returning `true` if all is well. If a specific `error` callback has
    // been passed, call that instead of firing the general `"error"` event.
    _validate: function(attrs, options) {
      if (options.silent || !this.validate) return true;
      attrs = _.extend({}, this.attributes, attrs);
      var error = this.validate(attrs, options);
      if (!error) return true;
      if (options && options.error) {
        options.error(this, error, options);
      } else {
        this.trigger('error', this, error, options);
      }
      return false;
    }

  });

  // Backbone.Collection
  // -------------------

  // Provides a standard collection class for our sets of models, ordered
  // or unordered. If a `comparator` is specified, the Collection will maintain
  // its models in sort order, as they're added and removed.
  var Collection = Backbone.Collection = function(models, options) {
    options || (options = {});
    if (options.model) this.model = options.model;
    if (options.comparator) this.comparator = options.comparator;
    this._reset();
    this.initialize.apply(this, arguments);
    if (models) this.reset(models, {silent: true, parse: options.parse});
  };

  // Define the Collection's inheritable methods.
  _.extend(Collection.prototype, Events, {

    // The default model for a collection is just a **Backbone.Model**.
    // This should be overridden in most cases.
    model: Model,

    // Initialize is an empty function by default. Override it with your own
    // initialization logic.
    initialize: function(){},

    // The JSON representation of a Collection is an array of the
    // models' attributes.
    toJSON: function(options) {
      return this.map(function(model){ return model.toJSON(options); });
    },

    // Add a model, or list of models to the set. Pass **silent** to avoid
    // firing the `add` event for every new model.
    add: function(models, options) {
      var i, index, length, model, cid, id, cids = {}, ids = {}, dups = [];
      options || (options = {});
      models = _.isArray(models) ? models.slice() : [models];

      // Begin by turning bare objects into model references, and preventing
      // invalid models or duplicate models from being added.
      for (i = 0, length = models.length; i < length; i++) {
        if (!(model = models[i] = this._prepareModel(models[i], options))) {
          throw new Error("Can't add an invalid model to a collection");
        }
        cid = model.cid;
        id = model.id;
        if (cids[cid] || this._byCid[cid] || ((id != null) && (ids[id] || this._byId[id]))) {
          dups.push(i);
          continue;
        }
        cids[cid] = ids[id] = model;
      }

      // Remove duplicates.
      i = dups.length;
      while (i--) {
        models.splice(dups[i], 1);
      }

      // Listen to added models' events, and index models for lookup by
      // `id` and by `cid`.
      for (i = 0, length = models.length; i < length; i++) {
        (model = models[i]).on('all', this._onModelEvent, this);
        this._byCid[model.cid] = model;
        if (model.id != null) this._byId[model.id] = model;
      }

      // Insert models into the collection, re-sorting if needed, and triggering
      // `add` events unless silenced.
      this.length += length;
      index = options.at != null ? options.at : this.models.length;
      splice.apply(this.models, [index, 0].concat(models));
      if (this.comparator) this.sort({silent: true});
      if (options.silent) return this;
      for (i = 0, length = this.models.length; i < length; i++) {
        if (!cids[(model = this.models[i]).cid]) continue;
        options.index = i;
        model.trigger('add', model, this, options);
      }
      return this;
    },

    // Remove a model, or a list of models from the set. Pass silent to avoid
    // firing the `remove` event for every model removed.
    remove: function(models, options) {
      var i, l, index, model;
      options || (options = {});
      models = _.isArray(models) ? models.slice() : [models];
      for (i = 0, l = models.length; i < l; i++) {
        model = this.getByCid(models[i]) || this.get(models[i]);
        if (!model) continue;
        delete this._byId[model.id];
        delete this._byCid[model.cid];
        index = this.indexOf(model);
        this.models.splice(index, 1);
        this.length--;
        if (!options.silent) {
          options.index = index;
          model.trigger('remove', model, this, options);
        }
        this._removeReference(model);
      }
      return this;
    },

    // Add a model to the end of the collection.
    push: function(model, options) {
      model = this._prepareModel(model, options);
      this.add(model, options);
      return model;
    },

    // Remove a model from the end of the collection.
    pop: function(options) {
      var model = this.at(this.length - 1);
      this.remove(model, options);
      return model;
    },

    // Add a model to the beginning of the collection.
    unshift: function(model, options) {
      model = this._prepareModel(model, options);
      this.add(model, _.extend({at: 0}, options));
      return model;
    },

    // Remove a model from the beginning of the collection.
    shift: function(options) {
      var model = this.at(0);
      this.remove(model, options);
      return model;
    },

    // Get a model from the set by id.
    get: function(id) {
      if (id == null) return void 0;
      return this._byId[id.id != null ? id.id : id];
    },

    // Get a model from the set by client id.
    getByCid: function(cid) {
      return cid && this._byCid[cid.cid || cid];
    },

    // Get the model at the given index.
    at: function(index) {
      return this.models[index];
    },

    // Return models with matching attributes. Useful for simple cases of `filter`.
    where: function(attrs) {
      if (_.isEmpty(attrs)) return [];
      return this.filter(function(model) {
        for (var key in attrs) {
          if (attrs[key] !== model.get(key)) return false;
        }
        return true;
      });
    },

    // Force the collection to re-sort itself. You don't need to call this under
    // normal circumstances, as the set will maintain sort order as each item
    // is added.
    sort: function(options) {
      options || (options = {});
      if (!this.comparator) throw new Error('Cannot sort a set without a comparator');
      var boundComparator = _.bind(this.comparator, this);
      if (this.comparator.length == 1) {
        this.models = this.sortBy(boundComparator);
      } else {
        this.models.sort(boundComparator);
      }
      if (!options.silent) this.trigger('reset', this, options);
      return this;
    },

    // Pluck an attribute from each model in the collection.
    pluck: function(attr) {
      return _.map(this.models, function(model){ return model.get(attr); });
    },

    // When you have more items than you want to add or remove individually,
    // you can reset the entire set with a new list of models, without firing
    // any `add` or `remove` events. Fires `reset` when finished.
    reset: function(models, options) {
      models  || (models = []);
      options || (options = {});
      for (var i = 0, l = this.models.length; i < l; i++) {
        this._removeReference(this.models[i]);
      }
      this._reset();
      this.add(models, _.extend({silent: true}, options));
      if (!options.silent) this.trigger('reset', this, options);
      return this;
    },

    // Fetch the default set of models for this collection, resetting the
    // collection when they arrive. If `add: true` is passed, appends the
    // models to the collection instead of resetting.
    fetch: function(options) {
      options = options ? _.clone(options) : {};
      if (options.parse === undefined) options.parse = true;
      var collection = this;
      var success = options.success;
      options.success = function(resp, status, xhr) {
        collection[options.add ? 'add' : 'reset'](collection.parse(resp, xhr), options);
        if (success) success(collection, resp);
      };
      options.error = Backbone.wrapError(options.error, collection, options);
      return (this.sync || Backbone.sync).call(this, 'read', this, options);
    },

    // Create a new instance of a model in this collection. Add the model to the
    // collection immediately, unless `wait: true` is passed, in which case we
    // wait for the server to agree.
    create: function(model, options) {
      var coll = this;
      options = options ? _.clone(options) : {};
      model = this._prepareModel(model, options);
      if (!model) return false;
      if (!options.wait) coll.add(model, options);
      var success = options.success;
      options.success = function(nextModel, resp, xhr) {
        if (options.wait) coll.add(nextModel, options);
        if (success) {
          success(nextModel, resp);
        } else {
          nextModel.trigger('sync', model, resp, options);
        }
      };
      model.save(null, options);
      return model;
    },

    // **parse** converts a response into a list of models to be added to the
    // collection. The default implementation is just to pass it through.
    parse: function(resp, xhr) {
      return resp;
    },

    // Proxy to _'s chain. Can't be proxied the same way the rest of the
    // underscore methods are proxied because it relies on the underscore
    // constructor.
    chain: function () {
      return _(this.models).chain();
    },

    // Reset all internal state. Called when the collection is reset.
    _reset: function(options) {
      this.length = 0;
      this.models = [];
      this._byId  = {};
      this._byCid = {};
    },

    // Prepare a model or hash of attributes to be added to this collection.
    _prepareModel: function(model, options) {
      options || (options = {});
      if (!(model instanceof Model)) {
        var attrs = model;
        options.collection = this;
        model = new this.model(attrs, options);
        if (!model._validate(model.attributes, options)) model = false;
      } else if (!model.collection) {
        model.collection = this;
      }
      return model;
    },

    // Internal method to remove a model's ties to a collection.
    _removeReference: function(model) {
      if (this == model.collection) {
        delete model.collection;
      }
      model.off('all', this._onModelEvent, this);
    },

    // Internal method called every time a model in the set fires an event.
    // Sets need to update their indexes when models change ids. All other
    // events simply proxy through. "add" and "remove" events that originate
    // in other collections are ignored.
    _onModelEvent: function(event, model, collection, options) {
      if ((event == 'add' || event == 'remove') && collection != this) return;
      if (event == 'destroy') {
        this.remove(model, options);
      }
      if (model && event === 'change:' + model.idAttribute) {
        delete this._byId[model.previous(model.idAttribute)];
        this._byId[model.id] = model;
      }
      this.trigger.apply(this, arguments);
    }

  });

  // Underscore methods that we want to implement on the Collection.
  var methods = ['forEach', 'each', 'map', 'reduce', 'reduceRight', 'find',
    'detect', 'filter', 'select', 'reject', 'every', 'all', 'some', 'any',
    'include', 'contains', 'invoke', 'max', 'min', 'sortBy', 'sortedIndex',
    'toArray', 'size', 'first', 'initial', 'rest', 'last', 'without', 'indexOf',
    'shuffle', 'lastIndexOf', 'isEmpty', 'groupBy'];

  // Mix in each Underscore method as a proxy to `Collection#models`.
  _.each(methods, function(method) {
    Collection.prototype[method] = function() {
      return _[method].apply(_, [this.models].concat(_.toArray(arguments)));
    };
  });

  // Backbone.Router
  // -------------------

  // Routers map faux-URLs to actions, and fire events when routes are
  // matched. Creating a new one sets its `routes` hash, if not set statically.
  var Router = Backbone.Router = function(options) {
    options || (options = {});
    if (options.routes) this.routes = options.routes;
    this._bindRoutes();
    this.initialize.apply(this, arguments);
  };

  // Cached regular expressions for matching named param parts and splatted
  // parts of route strings.
  var namedParam    = /:\w+/g;
  var splatParam    = /\*\w+/g;
  var escapeRegExp  = /[-[\]{}()+?.,\\^$|#\s]/g;

  // Set up all inheritable **Backbone.Router** properties and methods.
  _.extend(Router.prototype, Events, {

    // Initialize is an empty function by default. Override it with your own
    // initialization logic.
    initialize: function(){},

    // Manually bind a single named route to a callback. For example:
    //
    //     this.route('search/:query/p:num', 'search', function(query, num) {
    //       ...
    //     });
    //
    route: function(route, name, callback) {
      Backbone.history || (Backbone.history = new History);
      if (!_.isRegExp(route)) route = this._routeToRegExp(route);
      if (!callback) callback = this[name];
      Backbone.history.route(route, _.bind(function(fragment) {
        var args = this._extractParameters(route, fragment);
        callback && callback.apply(this, args);
        this.trigger.apply(this, ['route:' + name].concat(args));
        Backbone.history.trigger('route', this, name, args);
      }, this));
      return this;
    },

    // Simple proxy to `Backbone.history` to save a fragment into the history.
    navigate: function(fragment, options) {
      Backbone.history.navigate(fragment, options);
    },

    // Bind all defined routes to `Backbone.history`. We have to reverse the
    // order of the routes here to support behavior where the most general
    // routes can be defined at the bottom of the route map.
    _bindRoutes: function() {
      if (!this.routes) return;
      var routes = [];
      for (var route in this.routes) {
        routes.unshift([route, this.routes[route]]);
      }
      for (var i = 0, l = routes.length; i < l; i++) {
        this.route(routes[i][0], routes[i][1], this[routes[i][1]]);
      }
    },

    // Convert a route string into a regular expression, suitable for matching
    // against the current location hash.
    _routeToRegExp: function(route) {
      route = route.replace(escapeRegExp, '\\$&')
                   .replace(namedParam, '([^\/]+)')
                   .replace(splatParam, '(.*?)');
      return new RegExp('^' + route + '$');
    },

    // Given a route, and a URL fragment that it matches, return the array of
    // extracted parameters.
    _extractParameters: function(route, fragment) {
      return route.exec(fragment).slice(1);
    }

  });

  // Backbone.History
  // ----------------

  // Handles cross-browser history management, based on URL fragments. If the
  // browser does not support `onhashchange`, falls back to polling.
  var History = Backbone.History = function() {
    this.handlers = [];
    _.bindAll(this, 'checkUrl');
  };

  // Cached regex for cleaning leading hashes and slashes .
  var routeStripper = /^[#\/]/;

  // Cached regex for detecting MSIE.
  var isExplorer = /msie [\w.]+/;

  // Has the history handling already been started?
  History.started = false;

  // Set up all inheritable **Backbone.History** properties and methods.
  _.extend(History.prototype, Events, {

    // The default interval to poll for hash changes, if necessary, is
    // twenty times a second.
    interval: 50,

    // Gets the true hash value. Cannot use location.hash directly due to bug
    // in Firefox where location.hash will always be decoded.
    getHash: function(windowOverride) {
      var loc = windowOverride ? windowOverride.location : window.location;
      var match = loc.href.match(/#(.*)$/);
      return match ? match[1] : '';
    },

    // Get the cross-browser normalized URL fragment, either from the URL,
    // the hash, or the override.
    getFragment: function(fragment, forcePushState) {
      if (fragment == null) {
        if (this._hasPushState || forcePushState) {
          fragment = window.location.pathname;
          var search = window.location.search;
          if (search) fragment += search;
        } else {
          fragment = this.getHash();
        }
      }
      if (!fragment.indexOf(this.options.root)) fragment = fragment.substr(this.options.root.length);
      return fragment.replace(routeStripper, '');
    },

    // Start the hash change handling, returning `true` if the current URL matches
    // an existing route, and `false` otherwise.
    start: function(options) {
      if (History.started) throw new Error("Backbone.history has already been started");
      History.started = true;

      // Figure out the initial configuration. Do we need an iframe?
      // Is pushState desired ... is it available?
      this.options          = _.extend({}, {root: '/'}, this.options, options);
      this._wantsHashChange = this.options.hashChange !== false;
      this._wantsPushState  = !!this.options.pushState;
      this._hasPushState    = !!(this.options.pushState && window.history && window.history.pushState);
      var fragment          = this.getFragment();
      var docMode           = document.documentMode;
      var oldIE             = (isExplorer.exec(navigator.userAgent.toLowerCase()) && (!docMode || docMode <= 7));

      if (oldIE) {
        this.iframe = $('<iframe src="javascript:0" tabindex="-1" />').hide().appendTo('body')[0].contentWindow;
        this.navigate(fragment);
      }

      // Depending on whether we're using pushState or hashes, and whether
      // 'onhashchange' is supported, determine how we check the URL state.
      if (this._hasPushState) {
        $(window).bind('popstate', this.checkUrl);
      } else if (this._wantsHashChange && ('onhashchange' in window) && !oldIE) {
        $(window).bind('hashchange', this.checkUrl);
      } else if (this._wantsHashChange) {
        this._checkUrlInterval = setInterval(this.checkUrl, this.interval);
      }

      // Determine if we need to change the base url, for a pushState link
      // opened by a non-pushState browser.
      this.fragment = fragment;
      var loc = window.location;
      var atRoot  = loc.pathname == this.options.root;

      // If we've started off with a route from a `pushState`-enabled browser,
      // but we're currently in a browser that doesn't support it...
      if (this._wantsHashChange && this._wantsPushState && !this._hasPushState && !atRoot) {
        this.fragment = this.getFragment(null, true);
        window.location.replace(this.options.root + '#' + this.fragment);
        // Return immediately as browser will do redirect to new url
        return true;

      // Or if we've started out with a hash-based route, but we're currently
      // in a browser where it could be `pushState`-based instead...
      } else if (this._wantsPushState && this._hasPushState && atRoot && loc.hash) {
        this.fragment = this.getHash().replace(routeStripper, '');
        window.history.replaceState({}, document.title, loc.protocol + '//' + loc.host + this.options.root + this.fragment);
      }

      if (!this.options.silent) {
        return this.loadUrl();
      }
    },

    // Disable Backbone.history, perhaps temporarily. Not useful in a real app,
    // but possibly useful for unit testing Routers.
    stop: function() {
      $(window).unbind('popstate', this.checkUrl).unbind('hashchange', this.checkUrl);
      clearInterval(this._checkUrlInterval);
      History.started = false;
    },

    // Add a route to be tested when the fragment changes. Routes added later
    // may override previous routes.
    route: function(route, callback) {
      this.handlers.unshift({route: route, callback: callback});
    },

    // Checks the current URL to see if it has changed, and if it has,
    // calls `loadUrl`, normalizing across the hidden iframe.
    checkUrl: function(e) {
      var current = this.getFragment();
      if (current == this.fragment && this.iframe) current = this.getFragment(this.getHash(this.iframe));
      if (current == this.fragment) return false;
      if (this.iframe) this.navigate(current);
      this.loadUrl() || this.loadUrl(this.getHash());
    },

    // Attempt to load the current URL fragment. If a route succeeds with a
    // match, returns `true`. If no defined routes matches the fragment,
    // returns `false`.
    loadUrl: function(fragmentOverride) {
      var fragment = this.fragment = this.getFragment(fragmentOverride);
      var matched = _.any(this.handlers, function(handler) {
        if (handler.route.test(fragment)) {
          handler.callback(fragment);
          return true;
        }
      });
      return matched;
    },

    // Save a fragment into the hash history, or replace the URL state if the
    // 'replace' option is passed. You are responsible for properly URL-encoding
    // the fragment in advance.
    //
    // The options object can contain `trigger: true` if you wish to have the
    // route callback be fired (not usually desirable), or `replace: true`, if
    // you wish to modify the current URL without adding an entry to the history.
    navigate: function(fragment, options) {
      if (!History.started) return false;
      if (!options || options === true) options = {trigger: options};
      var frag = (fragment || '').replace(routeStripper, '');
      if (this.fragment == frag) return;

      // If pushState is available, we use it to set the fragment as a real URL.
      if (this._hasPushState) {
        if (frag.indexOf(this.options.root) != 0) frag = this.options.root + frag;
        this.fragment = frag;
        window.history[options.replace ? 'replaceState' : 'pushState']({}, document.title, frag);

      // If hash changes haven't been explicitly disabled, update the hash
      // fragment to store history.
      } else if (this._wantsHashChange) {
        this.fragment = frag;
        this._updateHash(window.location, frag, options.replace);
        if (this.iframe && (frag != this.getFragment(this.getHash(this.iframe)))) {
          // Opening and closing the iframe tricks IE7 and earlier to push a history entry on hash-tag change.
          // When replace is true, we don't want this.
          if(!options.replace) this.iframe.document.open().close();
          this._updateHash(this.iframe.location, frag, options.replace);
        }

      // If you've told us that you explicitly don't want fallback hashchange-
      // based history, then `navigate` becomes a page refresh.
      } else {
        window.location.assign(this.options.root + fragment);
      }
      if (options.trigger) this.loadUrl(fragment);
    },

    // Update the hash location, either replacing the current entry, or adding
    // a new one to the browser history.
    _updateHash: function(location, fragment, replace) {
      if (replace) {
        location.replace(location.toString().replace(/(javascript:|#).*$/, '') + '#' + fragment);
      } else {
        location.hash = fragment;
      }
    }
  });

  // Backbone.View
  // -------------

  // Creating a Backbone.View creates its initial element outside of the DOM,
  // if an existing element is not provided...
  var View = Backbone.View = function(options) {
    this.cid = _.uniqueId('view');
    this._configure(options || {});
    this._ensureElement();
    this.initialize.apply(this, arguments);
    this.delegateEvents();
  };

  // Cached regex to split keys for `delegate`.
  var delegateEventSplitter = /^(\S+)\s*(.*)$/;

  // List of view options to be merged as properties.
  var viewOptions = ['model', 'collection', 'el', 'id', 'attributes', 'className', 'tagName'];

  // Set up all inheritable **Backbone.View** properties and methods.
  _.extend(View.prototype, Events, {

    // The default `tagName` of a View's element is `"div"`.
    tagName: 'div',

    // jQuery delegate for element lookup, scoped to DOM elements within the
    // current view. This should be prefered to global lookups where possible.
    $: function(selector) {
      return this.$el.find(selector);
    },

    // Initialize is an empty function by default. Override it with your own
    // initialization logic.
    initialize: function(){},

    // **render** is the core function that your view should override, in order
    // to populate its element (`this.el`), with the appropriate HTML. The
    // convention is for **render** to always return `this`.
    render: function() {
      return this;
    },

    // Remove this view from the DOM. Note that the view isn't present in the
    // DOM by default, so calling this method may be a no-op.
    remove: function() {
      this.$el.remove();
      return this;
    },

    // For small amounts of DOM Elements, where a full-blown template isn't
    // needed, use **make** to manufacture elements, one at a time.
    //
    //     var el = this.make('li', {'class': 'row'}, this.model.escape('title'));
    //
    make: function(tagName, attributes, content) {
      var el = document.createElement(tagName);
      if (attributes) $(el).attr(attributes);
      if (content) $(el).html(content);
      return el;
    },

    // Change the view's element (`this.el` property), including event
    // re-delegation.
    setElement: function(element, delegate) {
      if (this.$el) this.undelegateEvents();
      this.$el = (element instanceof $) ? element : $(element);
      this.el = this.$el[0];
      if (delegate !== false) this.delegateEvents();
      return this;
    },

    // Set callbacks, where `this.events` is a hash of
    //
    // *{"event selector": "callback"}*
    //
    //     {
    //       'mousedown .title':  'edit',
    //       'click .button':     'save'
    //       'click .open':       function(e) { ... }
    //     }
    //
    // pairs. Callbacks will be bound to the view, with `this` set properly.
    // Uses event delegation for efficiency.
    // Omitting the selector binds the event to `this.el`.
    // This only works for delegate-able events: not `focus`, `blur`, and
    // not `change`, `submit`, and `reset` in Internet Explorer.
    delegateEvents: function(events) {
      if (!(events || (events = getValue(this, 'events')))) return;
      this.undelegateEvents();
      for (var key in events) {
        var method = events[key];
        if (!_.isFunction(method)) method = this[events[key]];
        if (!method) throw new Error('Method "' + events[key] + '" does not exist');
        var match = key.match(delegateEventSplitter);
        var eventName = match[1], selector = match[2];
        method = _.bind(method, this);
        eventName += '.delegateEvents' + this.cid;
        if (selector === '') {
          this.$el.bind(eventName, method);
        } else {
          this.$el.delegate(selector, eventName, method);
        }
      }
    },

    // Clears all callbacks previously bound to the view with `delegateEvents`.
    // You usually don't need to use this, but may wish to if you have multiple
    // Backbone views attached to the same DOM element.
    undelegateEvents: function() {
      this.$el.unbind('.delegateEvents' + this.cid);
    },

    // Performs the initial configuration of a View with a set of options.
    // Keys with special meaning *(model, collection, id, className)*, are
    // attached directly to the view.
    _configure: function(options) {
      if (this.options) options = _.extend({}, this.options, options);
      for (var i = 0, l = viewOptions.length; i < l; i++) {
        var attr = viewOptions[i];
        if (options[attr]) this[attr] = options[attr];
      }
      this.options = options;
    },

    // Ensure that the View has a DOM element to render into.
    // If `this.el` is a string, pass it through `$()`, take the first
    // matching element, and re-assign it to `el`. Otherwise, create
    // an element from the `id`, `className` and `tagName` properties.
    _ensureElement: function() {
      if (!this.el) {
        var attrs = getValue(this, 'attributes') || {};
        if (this.id) attrs.id = this.id;
        if (this.className) attrs['class'] = this.className;
        this.setElement(this.make(this.tagName, attrs), false);
      } else {
        this.setElement(this.el, false);
      }
    }

  });

  // The self-propagating extend function that Backbone classes use.
  var extend = function (protoProps, classProps) {
    var child = inherits(this, protoProps, classProps);
    child.extend = this.extend;
    return child;
  };

  // Set up inheritance for the model, collection, and view.
  Model.extend = Collection.extend = Router.extend = View.extend = extend;

  // Backbone.sync
  // -------------

  // Map from CRUD to HTTP for our default `Backbone.sync` implementation.
  var methodMap = {
    'create': 'POST',
    'update': 'PUT',
    'delete': 'DELETE',
    'read':   'GET'
  };

  // Override this function to change the manner in which Backbone persists
  // models to the server. You will be passed the type of request, and the
  // model in question. By default, makes a RESTful Ajax request
  // to the model's `url()`. Some possible customizations could be:
  //
  // * Use `setTimeout` to batch rapid-fire updates into a single request.
  // * Send up the models as XML instead of JSON.
  // * Persist models via WebSockets instead of Ajax.
  //
  // Turn on `Backbone.emulateHTTP` in order to send `PUT` and `DELETE` requests
  // as `POST`, with a `_method` parameter containing the true HTTP method,
  // as well as all requests with the body as `application/x-www-form-urlencoded`
  // instead of `application/json` with the model in a param named `model`.
  // Useful when interfacing with server-side languages like **PHP** that make
  // it difficult to read the body of `PUT` requests.
  Backbone.sync = function(method, model, options) {
    var type = methodMap[method];

    // Default options, unless specified.
    options || (options = {});

    // Default JSON-request options.
    var params = {type: type, dataType: 'json'};

    // Ensure that we have a URL.
    if (!options.url) {
      params.url = getValue(model, 'url') || urlError();
    }

    // Ensure that we have the appropriate request data.
    if (!options.data && model && (method == 'create' || method == 'update')) {
      params.contentType = 'application/json';
      params.data = JSON.stringify(model.toJSON());
    }

    // For older servers, emulate JSON by encoding the request into an HTML-form.
    if (Backbone.emulateJSON) {
      params.contentType = 'application/x-www-form-urlencoded';
      params.data = params.data ? {model: params.data} : {};
    }

    // For older servers, emulate HTTP by mimicking the HTTP method with `_method`
    // And an `X-HTTP-Method-Override` header.
    if (Backbone.emulateHTTP) {
      if (type === 'PUT' || type === 'DELETE') {
        if (Backbone.emulateJSON) params.data._method = type;
        params.type = 'POST';
        params.beforeSend = function(xhr) {
          xhr.setRequestHeader('X-HTTP-Method-Override', type);
        };
      }
    }

    // Don't process data on a non-GET request.
    if (params.type !== 'GET' && !Backbone.emulateJSON) {
      params.processData = false;
    }

    // Make the request, allowing the user to override any Ajax options.
    return $.ajax(_.extend(params, options));
  };

  // Wrap an optional error callback with a fallback error event.
  Backbone.wrapError = function(onError, originalModel, options) {
    return function(model, resp) {
      resp = model === originalModel ? resp : model;
      if (onError) {
        onError(originalModel, resp, options);
      } else {
        originalModel.trigger('error', originalModel, resp, options);
      }
    };
  };

  // Helpers
  // -------

  // Shared empty constructor function to aid in prototype-chain creation.
  var ctor = function(){};

  // Helper function to correctly set up the prototype chain, for subclasses.
  // Similar to `goog.inherits`, but uses a hash of prototype properties and
  // class properties to be extended.
  var inherits = function(parent, protoProps, staticProps) {
    var child;

    // The constructor function for the new subclass is either defined by you
    // (the "constructor" property in your `extend` definition), or defaulted
    // by us to simply call the parent's constructor.
    if (protoProps && protoProps.hasOwnProperty('constructor')) {
      child = protoProps.constructor;
    } else {
      child = function(){ parent.apply(this, arguments); };
    }

    // Inherit class (static) properties from parent.
    _.extend(child, parent);

    // Set the prototype chain to inherit from `parent`, without calling
    // `parent`'s constructor function.
    ctor.prototype = parent.prototype;
    child.prototype = new ctor();

    // Add prototype properties (instance properties) to the subclass,
    // if supplied.
    if (protoProps) _.extend(child.prototype, protoProps);

    // Add static properties to the constructor function, if supplied.
    if (staticProps) _.extend(child, staticProps);

    // Correctly set child's `prototype.constructor`.
    child.prototype.constructor = child;

    // Set a convenience property in case the parent's prototype is needed later.
    child.__super__ = parent.prototype;

    return child;
  };

  // Helper function to get a value from a Backbone object as a property
  // or as a function.
  var getValue = function(object, prop) {
    if (!(object && object[prop])) return null;
    return _.isFunction(object[prop]) ? object[prop]() : object[prop];
  };

  // Throw an error when a URL is needed, and none is supplied.
  var urlError = function() {
    throw new Error('A "url" property or function must be specified');
  };

}).call(this);

box.js

Box2D.js

/*
* Copyright (c) 2006-2007 Erin Catto http://www.gphysics.com
*
* This software is provided 'as-is', without any express or implied
* warranty.  In no event will the authors be held liable for any damages
* arising from the use of this software.
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
var Box2D = {};

(function (a2j, undefined) {

   if(!(Object.prototype.defineProperty instanceof Function)
      && Object.prototype.__defineGetter__ instanceof Function
      && Object.prototype.__defineSetter__ instanceof Function)
   {
      Object.defineProperty = function(obj, p, cfg) {
         if(cfg.get instanceof Function)
            obj.__defineGetter__(p, cfg.get);
         if(cfg.set instanceof Function)
            obj.__defineSetter__(p, cfg.set);
      }
   }
   
   function emptyFn() {};
   a2j.inherit = function(cls, base) {
      var tmpCtr = cls;
      emptyFn.prototype = base.prototype;
      cls.prototype = new emptyFn;
      cls.prototype.constructor = tmpCtr;
   };
   
   a2j.generateCallback = function generateCallback(context, cb) {
      return function () {
         cb.apply(context, arguments);
      };
   };
   
   a2j.NVector = function NVector(length) {
      if (length === undefined) length = 0;
      var tmp = new Array(length || 0);
      for (var i = 0; i < length; ++i)
      tmp[i] = 0;
      return tmp;
   };
   
   a2j.is = function is(o1, o2) {
      if (o1 === null) return false;
      if ((o2 instanceof Function) && (o1 instanceof o2)) return true;
      if ((o1.constructor.__implements != undefined) && (o1.constructor.__implements[o2])) return true;
      return false;
   };
   
   a2j.parseUInt = function(v) {
      return Math.abs(parseInt(v));
   }
   
})(Box2D);

//#TODO remove assignments from global namespace
var Vector = Array;
var Vector_a2j_Number = Box2D.NVector;
//package structure
if (typeof(Box2D) === "undefined") Box2D = {};
if (typeof(Box2D.Collision) === "undefined") Box2D.Collision = {};
if (typeof(Box2D.Collision.Shapes) === "undefined") Box2D.Collision.Shapes = {};
if (typeof(Box2D.Common) === "undefined") Box2D.Common = {};
if (typeof(Box2D.Common.Math) === "undefined") Box2D.Common.Math = {};
if (typeof(Box2D.Dynamics) === "undefined") Box2D.Dynamics = {};
if (typeof(Box2D.Dynamics.Contacts) === "undefined") Box2D.Dynamics.Contacts = {};
if (typeof(Box2D.Dynamics.Controllers) === "undefined") Box2D.Dynamics.Controllers = {};
if (typeof(Box2D.Dynamics.Joints) === "undefined") Box2D.Dynamics.Joints = {};
//pre-definitions
(function () {
   Box2D.Collision.IBroadPhase = 'Box2D.Collision.IBroadPhase';

   function b2AABB() {
      b2AABB.b2AABB.apply(this, arguments);
   };
   Box2D.Collision.b2AABB = b2AABB;

   function b2Bound() {
      b2Bound.b2Bound.apply(this, arguments);
   };
   Box2D.Collision.b2Bound = b2Bound;

   function b2BoundValues() {
      b2BoundValues.b2BoundValues.apply(this, arguments);
      if (this.constructor === b2BoundValues) this.b2BoundValues.apply(this, arguments);
   };
   Box2D.Collision.b2BoundValues = b2BoundValues;

   function b2Collision() {
      b2Collision.b2Collision.apply(this, arguments);
   };
   Box2D.Collision.b2Collision = b2Collision;

   function b2ContactID() {
      b2ContactID.b2ContactID.apply(this, arguments);
      if (this.constructor === b2ContactID) this.b2ContactID.apply(this, arguments);
   };
   Box2D.Collision.b2ContactID = b2ContactID;

   function b2ContactPoint() {
      b2ContactPoint.b2ContactPoint.apply(this, arguments);
   };
   Box2D.Collision.b2ContactPoint = b2ContactPoint;

   function b2Distance() {
      b2Distance.b2Distance.apply(this, arguments);
   };
   Box2D.Collision.b2Distance = b2Distance;

   function b2DistanceInput() {
      b2DistanceInput.b2DistanceInput.apply(this, arguments);
   };
   Box2D.Collision.b2DistanceInput = b2DistanceInput;

   function b2DistanceOutput() {
      b2DistanceOutput.b2DistanceOutput.apply(this, arguments);
   };
   Box2D.Collision.b2DistanceOutput = b2DistanceOutput;

   function b2DistanceProxy() {
      b2DistanceProxy.b2DistanceProxy.apply(this, arguments);
   };
   Box2D.Collision.b2DistanceProxy = b2DistanceProxy;

   function b2DynamicTree() {
      b2DynamicTree.b2DynamicTree.apply(this, arguments);
      if (this.constructor === b2DynamicTree) this.b2DynamicTree.apply(this, arguments);
   };
   Box2D.Collision.b2DynamicTree = b2DynamicTree;

   function b2DynamicTreeBroadPhase() {
      b2DynamicTreeBroadPhase.b2DynamicTreeBroadPhase.apply(this, arguments);
   };
   Box2D.Collision.b2DynamicTreeBroadPhase = b2DynamicTreeBroadPhase;

   function b2DynamicTreeNode() {
      b2DynamicTreeNode.b2DynamicTreeNode.apply(this, arguments);
   };
   Box2D.Collision.b2DynamicTreeNode = b2DynamicTreeNode;

   function b2DynamicTreePair() {
      b2DynamicTreePair.b2DynamicTreePair.apply(this, arguments);
   };
   Box2D.Collision.b2DynamicTreePair = b2DynamicTreePair;

   function b2Manifold() {
      b2Manifold.b2Manifold.apply(this, arguments);
      if (this.constructor === b2Manifold) this.b2Manifold.apply(this, arguments);
   };
   Box2D.Collision.b2Manifold = b2Manifold;

   function b2ManifoldPoint() {
      b2ManifoldPoint.b2ManifoldPoint.apply(this, arguments);
      if (this.constructor === b2ManifoldPoint) this.b2ManifoldPoint.apply(this, arguments);
   };
   Box2D.Collision.b2ManifoldPoint = b2ManifoldPoint;

   function b2Point() {
      b2Point.b2Point.apply(this, arguments);
   };
   Box2D.Collision.b2Point = b2Point;

   function b2RayCastInput() {
      b2RayCastInput.b2RayCastInput.apply(this, arguments);
      if (this.constructor === b2RayCastInput) this.b2RayCastInput.apply(this, arguments);
   };
   Box2D.Collision.b2RayCastInput = b2RayCastInput;

   function b2RayCastOutput() {
      b2RayCastOutput.b2RayCastOutput.apply(this, arguments);
   };
   Box2D.Collision.b2RayCastOutput = b2RayCastOutput;

   function b2Segment() {
      b2Segment.b2Segment.apply(this, arguments);
   };
   Box2D.Collision.b2Segment = b2Segment;

   function b2SeparationFunction() {
      b2SeparationFunction.b2SeparationFunction.apply(this, arguments);
   };
   Box2D.Collision.b2SeparationFunction = b2SeparationFunction;

   function b2Simplex() {
      b2Simplex.b2Simplex.apply(this, arguments);
      if (this.constructor === b2Simplex) this.b2Simplex.apply(this, arguments);
   };
   Box2D.Collision.b2Simplex = b2Simplex;

   function b2SimplexCache() {
      b2SimplexCache.b2SimplexCache.apply(this, arguments);
   };
   Box2D.Collision.b2SimplexCache = b2SimplexCache;

   function b2SimplexVertex() {
      b2SimplexVertex.b2SimplexVertex.apply(this, arguments);
   };
   Box2D.Collision.b2SimplexVertex = b2SimplexVertex;

   function b2TimeOfImpact() {
      b2TimeOfImpact.b2TimeOfImpact.apply(this, arguments);
   };
   Box2D.Collision.b2TimeOfImpact = b2TimeOfImpact;

   function b2TOIInput() {
      b2TOIInput.b2TOIInput.apply(this, arguments);
   };
   Box2D.Collision.b2TOIInput = b2TOIInput;

   function b2WorldManifold() {
      b2WorldManifold.b2WorldManifold.apply(this, arguments);
      if (this.constructor === b2WorldManifold) this.b2WorldManifold.apply(this, arguments);
   };
   Box2D.Collision.b2WorldManifold = b2WorldManifold;

   function ClipVertex() {
      ClipVertex.ClipVertex.apply(this, arguments);
   };
   Box2D.Collision.ClipVertex = ClipVertex;

   function Features() {
      Features.Features.apply(this, arguments);
   };
   Box2D.Collision.Features = Features;

   function b2CircleShape() {
      b2CircleShape.b2CircleShape.apply(this, arguments);
      if (this.constructor === b2CircleShape) this.b2CircleShape.apply(this, arguments);
   };
   Box2D.Collision.Shapes.b2CircleShape = b2CircleShape;

   function b2EdgeChainDef() {
      b2EdgeChainDef.b2EdgeChainDef.apply(this, arguments);
      if (this.constructor === b2EdgeChainDef) this.b2EdgeChainDef.apply(this, arguments);
   };
   Box2D.Collision.Shapes.b2EdgeChainDef = b2EdgeChainDef;

   function b2EdgeShape() {
      b2EdgeShape.b2EdgeShape.apply(this, arguments);
      if (this.constructor === b2EdgeShape) this.b2EdgeShape.apply(this, arguments);
   };
   Box2D.Collision.Shapes.b2EdgeShape = b2EdgeShape;

   function b2MassData() {
      b2MassData.b2MassData.apply(this, arguments);
   };
   Box2D.Collision.Shapes.b2MassData = b2MassData;

   function b2PolygonShape() {
      b2PolygonShape.b2PolygonShape.apply(this, arguments);
      if (this.constructor === b2PolygonShape) this.b2PolygonShape.apply(this, arguments);
   };
   Box2D.Collision.Shapes.b2PolygonShape = b2PolygonShape;

   function b2Shape() {
      b2Shape.b2Shape.apply(this, arguments);
      if (this.constructor === b2Shape) this.b2Shape.apply(this, arguments);
   };
   Box2D.Collision.Shapes.b2Shape = b2Shape;
   Box2D.Common.b2internal = 'Box2D.Common.b2internal';

   function b2Color() {
      b2Color.b2Color.apply(this, arguments);
      if (this.constructor === b2Color) this.b2Color.apply(this, arguments);
   };
   Box2D.Common.b2Color = b2Color;

   function b2Settings() {
      b2Settings.b2Settings.apply(this, arguments);
   };
   Box2D.Common.b2Settings = b2Settings;

   function b2Mat22() {
      b2Mat22.b2Mat22.apply(this, arguments);
      if (this.constructor === b2Mat22) this.b2Mat22.apply(this, arguments);
   };
   Box2D.Common.Math.b2Mat22 = b2Mat22;

   function b2Mat33() {
      b2Mat33.b2Mat33.apply(this, arguments);
      if (this.constructor === b2Mat33) this.b2Mat33.apply(this, arguments);
   };
   Box2D.Common.Math.b2Mat33 = b2Mat33;

   function b2Math() {
      b2Math.b2Math.apply(this, arguments);
   };
   Box2D.Common.Math.b2Math = b2Math;

   function b2Sweep() {
      b2Sweep.b2Sweep.apply(this, arguments);
   };
   Box2D.Common.Math.b2Sweep = b2Sweep;

   function b2Transform() {
      b2Transform.b2Transform.apply(this, arguments);
      if (this.constructor === b2Transform) this.b2Transform.apply(this, arguments);
   };
   Box2D.Common.Math.b2Transform = b2Transform;

   function b2Vec2() {
      b2Vec2.b2Vec2.apply(this, arguments);
      if (this.constructor === b2Vec2) this.b2Vec2.apply(this, arguments);
   };
   Box2D.Common.Math.b2Vec2 = b2Vec2;

   function b2Vec3() {
      b2Vec3.b2Vec3.apply(this, arguments);
      if (this.constructor === b2Vec3) this.b2Vec3.apply(this, arguments);
   };
   Box2D.Common.Math.b2Vec3 = b2Vec3;

   function b2Body() {
      b2Body.b2Body.apply(this, arguments);
      if (this.constructor === b2Body) this.b2Body.apply(this, arguments);
   };
   Box2D.Dynamics.b2Body = b2Body;

   function b2BodyDef() {
      b2BodyDef.b2BodyDef.apply(this, arguments);
      if (this.constructor === b2BodyDef) this.b2BodyDef.apply(this, arguments);
   };
   Box2D.Dynamics.b2BodyDef = b2BodyDef;

   function b2ContactFilter() {
      b2ContactFilter.b2ContactFilter.apply(this, arguments);
   };
   Box2D.Dynamics.b2ContactFilter = b2ContactFilter;

   function b2ContactImpulse() {
      b2ContactImpulse.b2ContactImpulse.apply(this, arguments);
   };
   Box2D.Dynamics.b2ContactImpulse = b2ContactImpulse;

   function b2ContactListener() {
      b2ContactListener.b2ContactListener.apply(this, arguments);
   };
   Box2D.Dynamics.b2ContactListener = b2ContactListener;

   function b2ContactManager() {
      b2ContactManager.b2ContactManager.apply(this, arguments);
      if (this.constructor === b2ContactManager) this.b2ContactManager.apply(this, arguments);
   };
   Box2D.Dynamics.b2ContactManager = b2ContactManager;

   function b2DebugDraw() {
      b2DebugDraw.b2DebugDraw.apply(this, arguments);
      if (this.constructor === b2DebugDraw) this.b2DebugDraw.apply(this, arguments);
   };
   Box2D.Dynamics.b2DebugDraw = b2DebugDraw;

   function b2DestructionListener() {
      b2DestructionListener.b2DestructionListener.apply(this, arguments);
   };
   Box2D.Dynamics.b2DestructionListener = b2DestructionListener;

   function b2FilterData() {
      b2FilterData.b2FilterData.apply(this, arguments);
   };
   Box2D.Dynamics.b2FilterData = b2FilterData;

   function b2Fixture() {
      b2Fixture.b2Fixture.apply(this, arguments);
      if (this.constructor === b2Fixture) this.b2Fixture.apply(this, arguments);
   };
   Box2D.Dynamics.b2Fixture = b2Fixture;

   function b2FixtureDef() {
      b2FixtureDef.b2FixtureDef.apply(this, arguments);
      if (this.constructor === b2FixtureDef) this.b2FixtureDef.apply(this, arguments);
   };
   Box2D.Dynamics.b2FixtureDef = b2FixtureDef;

   function b2Island() {
      b2Island.b2Island.apply(this, arguments);
      if (this.constructor === b2Island) this.b2Island.apply(this, arguments);
   };
   Box2D.Dynamics.b2Island = b2Island;

   function b2TimeStep() {
      b2TimeStep.b2TimeStep.apply(this, arguments);
   };
   Box2D.Dynamics.b2TimeStep = b2TimeStep;

   function b2World() {
      b2World.b2World.apply(this, arguments);
      if (this.constructor === b2World) this.b2World.apply(this, arguments);
   };
   Box2D.Dynamics.b2World = b2World;

   function b2CircleContact() {
      b2CircleContact.b2CircleContact.apply(this, arguments);
   };
   Box2D.Dynamics.Contacts.b2CircleContact = b2CircleContact;

   function b2Contact() {
      b2Contact.b2Contact.apply(this, arguments);
      if (this.constructor === b2Contact) this.b2Contact.apply(this, arguments);
   };
   Box2D.Dynamics.Contacts.b2Contact = b2Contact;

   function b2ContactConstraint() {
      b2ContactConstraint.b2ContactConstraint.apply(this, arguments);
      if (this.constructor === b2ContactConstraint) this.b2ContactConstraint.apply(this, arguments);
   };
   Box2D.Dynamics.Contacts.b2ContactConstraint = b2ContactConstraint;

   function b2ContactConstraintPoint() {
      b2ContactConstraintPoint.b2ContactConstraintPoint.apply(this, arguments);
   };
   Box2D.Dynamics.Contacts.b2ContactConstraintPoint = b2ContactConstraintPoint;

   function b2ContactEdge() {
      b2ContactEdge.b2ContactEdge.apply(this, arguments);
   };
   Box2D.Dynamics.Contacts.b2ContactEdge = b2ContactEdge;

   function b2ContactFactory() {
      b2ContactFactory.b2ContactFactory.apply(this, arguments);
      if (this.constructor === b2ContactFactory) this.b2ContactFactory.apply(this, arguments);
   };
   Box2D.Dynamics.Contacts.b2ContactFactory = b2ContactFactory;

   function b2ContactRegister() {
      b2ContactRegister.b2ContactRegister.apply(this, arguments);
   };
   Box2D.Dynamics.Contacts.b2ContactRegister = b2ContactRegister;

   function b2ContactResult() {
      b2ContactResult.b2ContactResult.apply(this, arguments);
   };
   Box2D.Dynamics.Contacts.b2ContactResult = b2ContactResult;

   function b2ContactSolver() {
      b2ContactSolver.b2ContactSolver.apply(this, arguments);
      if (this.constructor === b2ContactSolver) this.b2ContactSolver.apply(this, arguments);
   };
   Box2D.Dynamics.Contacts.b2ContactSolver = b2ContactSolver;

   function b2EdgeAndCircleContact() {
      b2EdgeAndCircleContact.b2EdgeAndCircleContact.apply(this, arguments);
   };
   Box2D.Dynamics.Contacts.b2EdgeAndCircleContact = b2EdgeAndCircleContact;

   function b2NullContact() {
      b2NullContact.b2NullContact.apply(this, arguments);
      if (this.constructor === b2NullContact) this.b2NullContact.apply(this, arguments);
   };
   Box2D.Dynamics.Contacts.b2NullContact = b2NullContact;

   function b2PolyAndCircleContact() {
      b2PolyAndCircleContact.b2PolyAndCircleContact.apply(this, arguments);
   };
   Box2D.Dynamics.Contacts.b2PolyAndCircleContact = b2PolyAndCircleContact;

   function b2PolyAndEdgeContact() {
      b2PolyAndEdgeContact.b2PolyAndEdgeContact.apply(this, arguments);
   };
   Box2D.Dynamics.Contacts.b2PolyAndEdgeContact = b2PolyAndEdgeContact;

   function b2PolygonContact() {
      b2PolygonContact.b2PolygonContact.apply(this, arguments);
   };
   Box2D.Dynamics.Contacts.b2PolygonContact = b2PolygonContact;

   function b2PositionSolverManifold() {
      b2PositionSolverManifold.b2PositionSolverManifold.apply(this, arguments);
      if (this.constructor === b2PositionSolverManifold) this.b2PositionSolverManifold.apply(this, arguments);
   };
   Box2D.Dynamics.Contacts.b2PositionSolverManifold = b2PositionSolverManifold;

   function b2BuoyancyController() {
      b2BuoyancyController.b2BuoyancyController.apply(this, arguments);
   };
   Box2D.Dynamics.Controllers.b2BuoyancyController = b2BuoyancyController;

   function b2ConstantAccelController() {
      b2ConstantAccelController.b2ConstantAccelController.apply(this, arguments);
   };
   Box2D.Dynamics.Controllers.b2ConstantAccelController = b2ConstantAccelController;

   function b2ConstantForceController() {
      b2ConstantForceController.b2ConstantForceController.apply(this, arguments);
   };
   Box2D.Dynamics.Controllers.b2ConstantForceController = b2ConstantForceController;

   function b2Controller() {
      b2Controller.b2Controller.apply(this, arguments);
   };
   Box2D.Dynamics.Controllers.b2Controller = b2Controller;

   function b2ControllerEdge() {
      b2ControllerEdge.b2ControllerEdge.apply(this, arguments);
   };
   Box2D.Dynamics.Controllers.b2ControllerEdge = b2ControllerEdge;

   function b2GravityController() {
      b2GravityController.b2GravityController.apply(this, arguments);
   };
   Box2D.Dynamics.Controllers.b2GravityController = b2GravityController;

   function b2TensorDampingController() {
      b2TensorDampingController.b2TensorDampingController.apply(this, arguments);
   };
   Box2D.Dynamics.Controllers.b2TensorDampingController = b2TensorDampingController;

   function b2DistanceJoint() {
      b2DistanceJoint.b2DistanceJoint.apply(this, arguments);
      if (this.constructor === b2DistanceJoint) this.b2DistanceJoint.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2DistanceJoint = b2DistanceJoint;

   function b2DistanceJointDef() {
      b2DistanceJointDef.b2DistanceJointDef.apply(this, arguments);
      if (this.constructor === b2DistanceJointDef) this.b2DistanceJointDef.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2DistanceJointDef = b2DistanceJointDef;

   function b2FrictionJoint() {
      b2FrictionJoint.b2FrictionJoint.apply(this, arguments);
      if (this.constructor === b2FrictionJoint) this.b2FrictionJoint.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2FrictionJoint = b2FrictionJoint;

   function b2FrictionJointDef() {
      b2FrictionJointDef.b2FrictionJointDef.apply(this, arguments);
      if (this.constructor === b2FrictionJointDef) this.b2FrictionJointDef.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2FrictionJointDef = b2FrictionJointDef;

   function b2GearJoint() {
      b2GearJoint.b2GearJoint.apply(this, arguments);
      if (this.constructor === b2GearJoint) this.b2GearJoint.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2GearJoint = b2GearJoint;

   function b2GearJointDef() {
      b2GearJointDef.b2GearJointDef.apply(this, arguments);
      if (this.constructor === b2GearJointDef) this.b2GearJointDef.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2GearJointDef = b2GearJointDef;

   function b2Jacobian() {
      b2Jacobian.b2Jacobian.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2Jacobian = b2Jacobian;

   function b2Joint() {
      b2Joint.b2Joint.apply(this, arguments);
      if (this.constructor === b2Joint) this.b2Joint.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2Joint = b2Joint;

   function b2JointDef() {
      b2JointDef.b2JointDef.apply(this, arguments);
      if (this.constructor === b2JointDef) this.b2JointDef.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2JointDef = b2JointDef;

   function b2JointEdge() {
      b2JointEdge.b2JointEdge.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2JointEdge = b2JointEdge;

   function b2LineJoint() {
      b2LineJoint.b2LineJoint.apply(this, arguments);
      if (this.constructor === b2LineJoint) this.b2LineJoint.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2LineJoint = b2LineJoint;

   function b2LineJointDef() {
      b2LineJointDef.b2LineJointDef.apply(this, arguments);
      if (this.constructor === b2LineJointDef) this.b2LineJointDef.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2LineJointDef = b2LineJointDef;

   function b2MouseJoint() {
      b2MouseJoint.b2MouseJoint.apply(this, arguments);
      if (this.constructor === b2MouseJoint) this.b2MouseJoint.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2MouseJoint = b2MouseJoint;

   function b2MouseJointDef() {
      b2MouseJointDef.b2MouseJointDef.apply(this, arguments);
      if (this.constructor === b2MouseJointDef) this.b2MouseJointDef.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2MouseJointDef = b2MouseJointDef;

   function b2PrismaticJoint() {
      b2PrismaticJoint.b2PrismaticJoint.apply(this, arguments);
      if (this.constructor === b2PrismaticJoint) this.b2PrismaticJoint.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2PrismaticJoint = b2PrismaticJoint;

   function b2PrismaticJointDef() {
      b2PrismaticJointDef.b2PrismaticJointDef.apply(this, arguments);
      if (this.constructor === b2PrismaticJointDef) this.b2PrismaticJointDef.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2PrismaticJointDef = b2PrismaticJointDef;

   function b2PulleyJoint() {
      b2PulleyJoint.b2PulleyJoint.apply(this, arguments);
      if (this.constructor === b2PulleyJoint) this.b2PulleyJoint.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2PulleyJoint = b2PulleyJoint;

   function b2PulleyJointDef() {
      b2PulleyJointDef.b2PulleyJointDef.apply(this, arguments);
      if (this.constructor === b2PulleyJointDef) this.b2PulleyJointDef.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2PulleyJointDef = b2PulleyJointDef;

   function b2RevoluteJoint() {
      b2RevoluteJoint.b2RevoluteJoint.apply(this, arguments);
      if (this.constructor === b2RevoluteJoint) this.b2RevoluteJoint.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2RevoluteJoint = b2RevoluteJoint;

   function b2RevoluteJointDef() {
      b2RevoluteJointDef.b2RevoluteJointDef.apply(this, arguments);
      if (this.constructor === b2RevoluteJointDef) this.b2RevoluteJointDef.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2RevoluteJointDef = b2RevoluteJointDef;

   function b2WeldJoint() {
      b2WeldJoint.b2WeldJoint.apply(this, arguments);
      if (this.constructor === b2WeldJoint) this.b2WeldJoint.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2WeldJoint = b2WeldJoint;

   function b2WeldJointDef() {
      b2WeldJointDef.b2WeldJointDef.apply(this, arguments);
      if (this.constructor === b2WeldJointDef) this.b2WeldJointDef.apply(this, arguments);
   };
   Box2D.Dynamics.Joints.b2WeldJointDef = b2WeldJointDef;
})(); //definitions
Box2D.postDefs = [];
(function () {
   var b2CircleShape = Box2D.Collision.Shapes.b2CircleShape,
      b2EdgeChainDef = Box2D.Collision.Shapes.b2EdgeChainDef,
      b2EdgeShape = Box2D.Collision.Shapes.b2EdgeShape,
      b2MassData = Box2D.Collision.Shapes.b2MassData,
      b2PolygonShape = Box2D.Collision.Shapes.b2PolygonShape,
      b2Shape = Box2D.Collision.Shapes.b2Shape,
      b2Color = Box2D.Common.b2Color,
      b2internal = Box2D.Common.b2internal,
      b2Settings = Box2D.Common.b2Settings,
      b2Mat22 = Box2D.Common.Math.b2Mat22,
      b2Mat33 = Box2D.Common.Math.b2Mat33,
      b2Math = Box2D.Common.Math.b2Math,
      b2Sweep = Box2D.Common.Math.b2Sweep,
      b2Transform = Box2D.Common.Math.b2Transform,
      b2Vec2 = Box2D.Common.Math.b2Vec2,
      b2Vec3 = Box2D.Common.Math.b2Vec3,
      b2AABB = Box2D.Collision.b2AABB,
      b2Bound = Box2D.Collision.b2Bound,
      b2BoundValues = Box2D.Collision.b2BoundValues,
      b2Collision = Box2D.Collision.b2Collision,
      b2ContactID = Box2D.Collision.b2ContactID,
      b2ContactPoint = Box2D.Collision.b2ContactPoint,
      b2Distance = Box2D.Collision.b2Distance,
      b2DistanceInput = Box2D.Collision.b2DistanceInput,
      b2DistanceOutput = Box2D.Collision.b2DistanceOutput,
      b2DistanceProxy = Box2D.Collision.b2DistanceProxy,
      b2DynamicTree = Box2D.Collision.b2DynamicTree,
      b2DynamicTreeBroadPhase = Box2D.Collision.b2DynamicTreeBroadPhase,
      b2DynamicTreeNode = Box2D.Collision.b2DynamicTreeNode,
      b2DynamicTreePair = Box2D.Collision.b2DynamicTreePair,
      b2Manifold = Box2D.Collision.b2Manifold,
      b2ManifoldPoint = Box2D.Collision.b2ManifoldPoint,
      b2Point = Box2D.Collision.b2Point,
      b2RayCastInput = Box2D.Collision.b2RayCastInput,
      b2RayCastOutput = Box2D.Collision.b2RayCastOutput,
      b2Segment = Box2D.Collision.b2Segment,
      b2SeparationFunction = Box2D.Collision.b2SeparationFunction,
      b2Simplex = Box2D.Collision.b2Simplex,
      b2SimplexCache = Box2D.Collision.b2SimplexCache,
      b2SimplexVertex = Box2D.Collision.b2SimplexVertex,
      b2TimeOfImpact = Box2D.Collision.b2TimeOfImpact,
      b2TOIInput = Box2D.Collision.b2TOIInput,
      b2WorldManifold = Box2D.Collision.b2WorldManifold,
      ClipVertex = Box2D.Collision.ClipVertex,
      Features = Box2D.Collision.Features,
      IBroadPhase = Box2D.Collision.IBroadPhase;

   b2AABB.b2AABB = function () {
      this.lowerBound = new b2Vec2();
      this.upperBound = new b2Vec2();
   };
   b2AABB.prototype.IsValid = function () {
      var dX = this.upperBound.x - this.lowerBound.x;
      var dY = this.upperBound.y - this.lowerBound.y;
      var valid = dX >= 0.0 && dY >= 0.0;
      valid = valid && this.lowerBound.IsValid() && this.upperBound.IsValid();
      return valid;
   }
   b2AABB.prototype.GetCenter = function () {
      return new b2Vec2((this.lowerBound.x + this.upperBound.x) / 2, (this.lowerBound.y + this.upperBound.y) / 2);
   }
   b2AABB.prototype.GetExtents = function () {
      return new b2Vec2((this.upperBound.x - this.lowerBound.x) / 2, (this.upperBound.y - this.lowerBound.y) / 2);
   }
   b2AABB.prototype.Contains = function (aabb) {
      var result = true;
      result = result && this.lowerBound.x <= aabb.lowerBound.x;
      result = result && this.lowerBound.y <= aabb.lowerBound.y;
      result = result && aabb.upperBound.x <= this.upperBound.x;
      result = result && aabb.upperBound.y <= this.upperBound.y;
      return result;
   }
   b2AABB.prototype.RayCast = function (output, input) {
      var tmin = (-Number.MAX_VALUE);
      var tmax = Number.MAX_VALUE;
      var pX = input.p1.x;
      var pY = input.p1.y;
      var dX = input.p2.x - input.p1.x;
      var dY = input.p2.y - input.p1.y;
      var absDX = Math.abs(dX);
      var absDY = Math.abs(dY);
      var normal = output.normal;
      var inv_d = 0;
      var t1 = 0;
      var t2 = 0;
      var t3 = 0;
      var s = 0; {
         if (absDX < Number.MIN_VALUE) {
            if (pX < this.lowerBound.x || this.upperBound.x < pX) return false;
         }
         else {
            inv_d = 1.0 / dX;
            t1 = (this.lowerBound.x - pX) * inv_d;
            t2 = (this.upperBound.x - pX) * inv_d;
            s = (-1.0);
            if (t1 > t2) {
               t3 = t1;
               t1 = t2;
               t2 = t3;
               s = 1.0;
            }
            if (t1 > tmin) {
               normal.x = s;
               normal.y = 0;
               tmin = t1;
            }
            tmax = Math.min(tmax, t2);
            if (tmin > tmax) return false;
         }
      } {
         if (absDY < Number.MIN_VALUE) {
            if (pY < this.lowerBound.y || this.upperBound.y < pY) return false;
         }
         else {
            inv_d = 1.0 / dY;
            t1 = (this.lowerBound.y - pY) * inv_d;
            t2 = (this.upperBound.y - pY) * inv_d;
            s = (-1.0);
            if (t1 > t2) {
               t3 = t1;
               t1 = t2;
               t2 = t3;
               s = 1.0;
            }
            if (t1 > tmin) {
               normal.y = s;
               normal.x = 0;
               tmin = t1;
            }
            tmax = Math.min(tmax, t2);
            if (tmin > tmax) return false;
         }
      }
      output.fraction = tmin;
      return true;
   }
   b2AABB.prototype.TestOverlap = function (other) {
      var d1X = other.lowerBound.x - this.upperBound.x;
      var d1Y = other.lowerBound.y - this.upperBound.y;
      var d2X = this.lowerBound.x - other.upperBound.x;
      var d2Y = this.lowerBound.y - other.upperBound.y;
      if (d1X > 0.0 || d1Y > 0.0) return false;
      if (d2X > 0.0 || d2Y > 0.0) return false;
      return true;
   }
   b2AABB.Combine = function (aabb1, aabb2) {
      var aabb = new b2AABB();
      aabb.Combine(aabb1, aabb2);
      return aabb;
   }
   b2AABB.prototype.Combine = function (aabb1, aabb2) {
      this.lowerBound.x = Math.min(aabb1.lowerBound.x, aabb2.lowerBound.x);
      this.lowerBound.y = Math.min(aabb1.lowerBound.y, aabb2.lowerBound.y);
      this.upperBound.x = Math.max(aabb1.upperBound.x, aabb2.upperBound.x);
      this.upperBound.y = Math.max(aabb1.upperBound.y, aabb2.upperBound.y);
   }
   b2Bound.b2Bound = function () {};
   b2Bound.prototype.IsLower = function () {
      return (this.value & 1) == 0;
   }
   b2Bound.prototype.IsUpper = function () {
      return (this.value & 1) == 1;
   }
   b2Bound.prototype.Swap = function (b) {
      var tempValue = this.value;
      var tempProxy = this.proxy;
      var tempStabbingCount = this.stabbingCount;
      this.value = b.value;
      this.proxy = b.proxy;
      this.stabbingCount = b.stabbingCount;
      b.value = tempValue;
      b.proxy = tempProxy;
      b.stabbingCount = tempStabbingCount;
   }
   b2BoundValues.b2BoundValues = function () {};
   b2BoundValues.prototype.b2BoundValues = function () {
      this.lowerValues = new Vector_a2j_Number();
      this.lowerValues[0] = 0.0;
      this.lowerValues[1] = 0.0;
      this.upperValues = new Vector_a2j_Number();
      this.upperValues[0] = 0.0;
      this.upperValues[1] = 0.0;
   }
   b2Collision.b2Collision = function () {};
   b2Collision.ClipSegmentToLine = function (vOut, vIn, normal, offset) {
      if (offset === undefined) offset = 0;
      var cv;
      var numOut = 0;
      cv = vIn[0];
      var vIn0 = cv.v;
      cv = vIn[1];
      var vIn1 = cv.v;
      var distance0 = normal.x * vIn0.x + normal.y * vIn0.y - offset;
      var distance1 = normal.x * vIn1.x + normal.y * vIn1.y - offset;
      if (distance0 <= 0.0) vOut[numOut++].Set(vIn[0]);
      if (distance1 <= 0.0) vOut[numOut++].Set(vIn[1]);
      if (distance0 * distance1 < 0.0) {
         var interp = distance0 / (distance0 - distance1);
         cv = vOut[numOut];
         var tVec = cv.v;
         tVec.x = vIn0.x + interp * (vIn1.x - vIn0.x);
         tVec.y = vIn0.y + interp * (vIn1.y - vIn0.y);
         cv = vOut[numOut];
         var cv2;
         if (distance0 > 0.0) {
            cv2 = vIn[0];
            cv.id = cv2.id;
         }
         else {
            cv2 = vIn[1];
            cv.id = cv2.id;
         }++numOut;
      }
      return numOut;
   }
   b2Collision.EdgeSeparation = function (poly1, xf1, edge1, poly2, xf2) {
      if (edge1 === undefined) edge1 = 0;
      var count1 = parseInt(poly1.m_vertexCount);
      var vertices1 = poly1.m_vertices;
      var normals1 = poly1.m_normals;
      var count2 = parseInt(poly2.m_vertexCount);
      var vertices2 = poly2.m_vertices;
      var tMat;
      var tVec;
      tMat = xf1.R;
      tVec = normals1[edge1];
      var normal1WorldX = (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
      var normal1WorldY = (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
      tMat = xf2.R;
      var normal1X = (tMat.col1.x * normal1WorldX + tMat.col1.y * normal1WorldY);
      var normal1Y = (tMat.col2.x * normal1WorldX + tMat.col2.y * normal1WorldY);
      var index = 0;
      var minDot = Number.MAX_VALUE;
      for (var i = 0; i < count2; ++i) {
         tVec = vertices2[i];
         var dot = tVec.x * normal1X + tVec.y * normal1Y;
         if (dot < minDot) {
            minDot = dot;
            index = i;
         }
      }
      tVec = vertices1[edge1];
      tMat = xf1.R;
      var v1X = xf1.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
      var v1Y = xf1.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
      tVec = vertices2[index];
      tMat = xf2.R;
      var v2X = xf2.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
      var v2Y = xf2.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
      v2X -= v1X;
      v2Y -= v1Y;
      var separation = v2X * normal1WorldX + v2Y * normal1WorldY;
      return separation;
   }
   b2Collision.FindMaxSeparation = function (edgeIndex, poly1, xf1, poly2, xf2) {
      var count1 = parseInt(poly1.m_vertexCount);
      var normals1 = poly1.m_normals;
      var tVec;
      var tMat;
      tMat = xf2.R;
      tVec = poly2.m_centroid;
      var dX = xf2.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
      var dY = xf2.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
      tMat = xf1.R;
      tVec = poly1.m_centroid;
      dX -= xf1.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
      dY -= xf1.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
      var dLocal1X = (dX * xf1.R.col1.x + dY * xf1.R.col1.y);
      var dLocal1Y = (dX * xf1.R.col2.x + dY * xf1.R.col2.y);
      var edge = 0;
      var maxDot = (-Number.MAX_VALUE);
      for (var i = 0; i < count1; ++i) {
         tVec = normals1[i];
         var dot = (tVec.x * dLocal1X + tVec.y * dLocal1Y);
         if (dot > maxDot) {
            maxDot = dot;
            edge = i;
         }
      }
      var s = b2Collision.EdgeSeparation(poly1, xf1, edge, poly2, xf2);
      var prevEdge = parseInt(edge - 1 >= 0 ? edge - 1 : count1 - 1);
      var sPrev = b2Collision.EdgeSeparation(poly1, xf1, prevEdge, poly2, xf2);
      var nextEdge = parseInt(edge + 1 < count1 ? edge + 1 : 0);
      var sNext = b2Collision.EdgeSeparation(poly1, xf1, nextEdge, poly2, xf2);
      var bestEdge = 0;
      var bestSeparation = 0;
      var increment = 0;
      if (sPrev > s && sPrev > sNext) {
         increment = (-1);
         bestEdge = prevEdge;
         bestSeparation = sPrev;
      }
      else if (sNext > s) {
         increment = 1;
         bestEdge = nextEdge;
         bestSeparation = sNext;
      }
      else {
         edgeIndex[0] = edge;
         return s;
      }
      while (true) {
         if (increment == (-1)) edge = bestEdge - 1 >= 0 ? bestEdge - 1 : count1 - 1;
         else edge = bestEdge + 1 < count1 ? bestEdge + 1 : 0;s = b2Collision.EdgeSeparation(poly1, xf1, edge, poly2, xf2);
         if (s > bestSeparation) {
            bestEdge = edge;
            bestSeparation = s;
         }
         else {
            break;
         }
      }
      edgeIndex[0] = bestEdge;
      return bestSeparation;
   }
   b2Collision.FindIncidentEdge = function (c, poly1, xf1, edge1, poly2, xf2) {
      if (edge1 === undefined) edge1 = 0;
      var count1 = parseInt(poly1.m_vertexCount);
      var normals1 = poly1.m_normals;
      var count2 = parseInt(poly2.m_vertexCount);
      var vertices2 = poly2.m_vertices;
      var normals2 = poly2.m_normals;
      var tMat;
      var tVec;
      tMat = xf1.R;
      tVec = normals1[edge1];
      var normal1X = (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
      var normal1Y = (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
      tMat = xf2.R;
      var tX = (tMat.col1.x * normal1X + tMat.col1.y * normal1Y);
      normal1Y = (tMat.col2.x * normal1X + tMat.col2.y * normal1Y);
      normal1X = tX;
      var index = 0;
      var minDot = Number.MAX_VALUE;
      for (var i = 0; i < count2; ++i) {
         tVec = normals2[i];
         var dot = (normal1X * tVec.x + normal1Y * tVec.y);
         if (dot < minDot) {
            minDot = dot;
            index = i;
         }
      }
      var tClip;
      var i1 = parseInt(index);
      var i2 = parseInt(i1 + 1 < count2 ? i1 + 1 : 0);
      tClip = c[0];
      tVec = vertices2[i1];
      tMat = xf2.R;
      tClip.v.x = xf2.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
      tClip.v.y = xf2.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
      tClip.id.features.referenceEdge = edge1;
      tClip.id.features.incidentEdge = i1;
      tClip.id.features.incidentVertex = 0;
      tClip = c[1];
      tVec = vertices2[i2];
      tMat = xf2.R;
      tClip.v.x = xf2.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
      tClip.v.y = xf2.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
      tClip.id.features.referenceEdge = edge1;
      tClip.id.features.incidentEdge = i2;
      tClip.id.features.incidentVertex = 1;
   }
   b2Collision.MakeClipPointVector = function () {
      var r = new Vector(2);
      r[0] = new ClipVertex();
      r[1] = new ClipVertex();
      return r;
   }
   b2Collision.CollidePolygons = function (manifold, polyA, xfA, polyB, xfB) {
      var cv;
      manifold.m_pointCount = 0;
      var totalRadius = polyA.m_radius + polyB.m_radius;
      var edgeA = 0;
      b2Collision.s_edgeAO[0] = edgeA;
      var separationA = b2Collision.FindMaxSeparation(b2Collision.s_edgeAO, polyA, xfA, polyB, xfB);
      edgeA = b2Collision.s_edgeAO[0];
      if (separationA > totalRadius) return;
      var edgeB = 0;
      b2Collision.s_edgeBO[0] = edgeB;
      var separationB = b2Collision.FindMaxSeparation(b2Collision.s_edgeBO, polyB, xfB, polyA, xfA);
      edgeB = b2Collision.s_edgeBO[0];
      if (separationB > totalRadius) return;
      var poly1;
      var poly2;
      var xf1;
      var xf2;
      var edge1 = 0;
      var flip = 0;
      var k_relativeTol = 0.98;
      var k_absoluteTol = 0.001;
      var tMat;
      if (separationB > k_relativeTol * separationA + k_absoluteTol) {
         poly1 = polyB;
         poly2 = polyA;
         xf1 = xfB;
         xf2 = xfA;
         edge1 = edgeB;
         manifold.m_type = b2Manifold.e_faceB;
         flip = 1;
      }
      else {
         poly1 = polyA;
         poly2 = polyB;
         xf1 = xfA;
         xf2 = xfB;
         edge1 = edgeA;
         manifold.m_type = b2Manifold.e_faceA;
         flip = 0;
      }
      var incidentEdge = b2Collision.s_incidentEdge;
      b2Collision.FindIncidentEdge(incidentEdge, poly1, xf1, edge1, poly2, xf2);
      var count1 = parseInt(poly1.m_vertexCount);
      var vertices1 = poly1.m_vertices;
      var local_v11 = vertices1[edge1];
      var local_v12;
      if (edge1 + 1 < count1) {
         local_v12 = vertices1[parseInt(edge1 + 1)];
      }
      else {
         local_v12 = vertices1[0];
      }
      var localTangent = b2Collision.s_localTangent;
      localTangent.Set(local_v12.x - local_v11.x, local_v12.y - local_v11.y);
      localTangent.Normalize();
      var localNormal = b2Collision.s_localNormal;
      localNormal.x = localTangent.y;
      localNormal.y = (-localTangent.x);
      var planePoint = b2Collision.s_planePoint;
      planePoint.Set(0.5 * (local_v11.x + local_v12.x), 0.5 * (local_v11.y + local_v12.y));
      var tangent = b2Collision.s_tangent;
      tMat = xf1.R;
      tangent.x = (tMat.col1.x * localTangent.x + tMat.col2.x * localTangent.y);
      tangent.y = (tMat.col1.y * localTangent.x + tMat.col2.y * localTangent.y);
      var tangent2 = b2Collision.s_tangent2;
      tangent2.x = (-tangent.x);
      tangent2.y = (-tangent.y);
      var normal = b2Collision.s_normal;
      normal.x = tangent.y;
      normal.y = (-tangent.x);
      var v11 = b2Collision.s_v11;
      var v12 = b2Collision.s_v12;
      v11.x = xf1.position.x + (tMat.col1.x * local_v11.x + tMat.col2.x * local_v11.y);
      v11.y = xf1.position.y + (tMat.col1.y * local_v11.x + tMat.col2.y * local_v11.y);
      v12.x = xf1.position.x + (tMat.col1.x * local_v12.x + tMat.col2.x * local_v12.y);
      v12.y = xf1.position.y + (tMat.col1.y * local_v12.x + tMat.col2.y * local_v12.y);
      var frontOffset = normal.x * v11.x + normal.y * v11.y;
      var sideOffset1 = (-tangent.x * v11.x) - tangent.y * v11.y + totalRadius;
      var sideOffset2 = tangent.x * v12.x + tangent.y * v12.y + totalRadius;
      var clipPoints1 = b2Collision.s_clipPoints1;
      var clipPoints2 = b2Collision.s_clipPoints2;
      var np = 0;
      np = b2Collision.ClipSegmentToLine(clipPoints1, incidentEdge, tangent2, sideOffset1);
      if (np < 2) return;
      np = b2Collision.ClipSegmentToLine(clipPoints2, clipPoints1, tangent, sideOffset2);
      if (np < 2) return;
      manifold.m_localPlaneNormal.SetV(localNormal);
      manifold.m_localPoint.SetV(planePoint);
      var pointCount = 0;
      for (var i = 0; i < b2Settings.b2_maxManifoldPoints; ++i) {
         cv = clipPoints2[i];
         var separation = normal.x * cv.v.x + normal.y * cv.v.y - frontOffset;
         if (separation <= totalRadius) {
            var cp = manifold.m_points[pointCount];
            tMat = xf2.R;
            var tX = cv.v.x - xf2.position.x;
            var tY = cv.v.y - xf2.position.y;
            cp.m_localPoint.x = (tX * tMat.col1.x + tY * tMat.col1.y);
            cp.m_localPoint.y = (tX * tMat.col2.x + tY * tMat.col2.y);
            cp.m_id.Set(cv.id);
            cp.m_id.features.flip = flip;
            ++pointCount;
         }
      }
      manifold.m_pointCount = pointCount;
   }
   b2Collision.CollideCircles = function (manifold, circle1, xf1, circle2, xf2) {
      manifold.m_pointCount = 0;
      var tMat;
      var tVec;
      tMat = xf1.R;
      tVec = circle1.m_p;
      var p1X = xf1.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
      var p1Y = xf1.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
      tMat = xf2.R;
      tVec = circle2.m_p;
      var p2X = xf2.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
      var p2Y = xf2.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
      var dX = p2X - p1X;
      var dY = p2Y - p1Y;
      var distSqr = dX * dX + dY * dY;
      var radius = circle1.m_radius + circle2.m_radius;
      if (distSqr > radius * radius) {
         return;
      }
      manifold.m_type = b2Manifold.e_circles;
      manifold.m_localPoint.SetV(circle1.m_p);
      manifold.m_localPlaneNormal.SetZero();
      manifold.m_pointCount = 1;
      manifold.m_points[0].m_localPoint.SetV(circle2.m_p);
      manifold.m_points[0].m_id.key = 0;
   }
   b2Collision.CollidePolygonAndCircle = function (manifold, polygon, xf1, circle, xf2) {
      manifold.m_pointCount = 0;
      var tPoint;
      var dX = 0;
      var dY = 0;
      var positionX = 0;
      var positionY = 0;
      var tVec;
      var tMat;
      tMat = xf2.R;
      tVec = circle.m_p;
      var cX = xf2.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
      var cY = xf2.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
      dX = cX - xf1.position.x;
      dY = cY - xf1.position.y;
      tMat = xf1.R;
      var cLocalX = (dX * tMat.col1.x + dY * tMat.col1.y);
      var cLocalY = (dX * tMat.col2.x + dY * tMat.col2.y);
      var dist = 0;
      var normalIndex = 0;
      var separation = (-Number.MAX_VALUE);
      var radius = polygon.m_radius + circle.m_radius;
      var vertexCount = parseInt(polygon.m_vertexCount);
      var vertices = polygon.m_vertices;
      var normals = polygon.m_normals;
      for (var i = 0; i < vertexCount; ++i) {
         tVec = vertices[i];
         dX = cLocalX - tVec.x;
         dY = cLocalY - tVec.y;
         tVec = normals[i];
         var s = tVec.x * dX + tVec.y * dY;
         if (s > radius) {
            return;
         }
         if (s > separation) {
            separation = s;
            normalIndex = i;
         }
      }
      var vertIndex1 = parseInt(normalIndex);
      var vertIndex2 = parseInt(vertIndex1 + 1 < vertexCount ? vertIndex1 + 1 : 0);
      var v1 = vertices[vertIndex1];
      var v2 = vertices[vertIndex2];
      if (separation < Number.MIN_VALUE) {
         manifold.m_pointCount = 1;
         manifold.m_type = b2Manifold.e_faceA;
         manifold.m_localPlaneNormal.SetV(normals[normalIndex]);
         manifold.m_localPoint.x = 0.5 * (v1.x + v2.x);
         manifold.m_localPoint.y = 0.5 * (v1.y + v2.y);
         manifold.m_points[0].m_localPoint.SetV(circle.m_p);
         manifold.m_points[0].m_id.key = 0;
         return;
      }
      var u1 = (cLocalX - v1.x) * (v2.x - v1.x) + (cLocalY - v1.y) * (v2.y - v1.y);
      var u2 = (cLocalX - v2.x) * (v1.x - v2.x) + (cLocalY - v2.y) * (v1.y - v2.y);
      if (u1 <= 0.0) {
         if ((cLocalX - v1.x) * (cLocalX - v1.x) + (cLocalY - v1.y) * (cLocalY - v1.y) > radius * radius) return;
         manifold.m_pointCount = 1;
         manifold.m_type = b2Manifold.e_faceA;
         manifold.m_localPlaneNormal.x = cLocalX - v1.x;
         manifold.m_localPlaneNormal.y = cLocalY - v1.y;
         manifold.m_localPlaneNormal.Normalize();
         manifold.m_localPoint.SetV(v1);
         manifold.m_points[0].m_localPoint.SetV(circle.m_p);
         manifold.m_points[0].m_id.key = 0;
      }
      else if (u2 <= 0) {
         if ((cLocalX - v2.x) * (cLocalX - v2.x) + (cLocalY - v2.y) * (cLocalY - v2.y) > radius * radius) return;
         manifold.m_pointCount = 1;
         manifold.m_type = b2Manifold.e_faceA;
         manifold.m_localPlaneNormal.x = cLocalX - v2.x;
         manifold.m_localPlaneNormal.y = cLocalY - v2.y;
         manifold.m_localPlaneNormal.Normalize();
         manifold.m_localPoint.SetV(v2);
         manifold.m_points[0].m_localPoint.SetV(circle.m_p);
         manifold.m_points[0].m_id.key = 0;
      }
      else {
         var faceCenterX = 0.5 * (v1.x + v2.x);
         var faceCenterY = 0.5 * (v1.y + v2.y);
         separation = (cLocalX - faceCenterX) * normals[vertIndex1].x + (cLocalY - faceCenterY) * normals[vertIndex1].y;
         if (separation > radius) return;
         manifold.m_pointCount = 1;
         manifold.m_type = b2Manifold.e_faceA;
         manifold.m_localPlaneNormal.x = normals[vertIndex1].x;
         manifold.m_localPlaneNormal.y = normals[vertIndex1].y;
         manifold.m_localPlaneNormal.Normalize();
         manifold.m_localPoint.Set(faceCenterX, faceCenterY);
         manifold.m_points[0].m_localPoint.SetV(circle.m_p);
         manifold.m_points[0].m_id.key = 0;
      }
   }
   b2Collision.TestOverlap = function (a, b) {
      var t1 = b.lowerBound;
      var t2 = a.upperBound;
      var d1X = t1.x - t2.x;
      var d1Y = t1.y - t2.y;
      t1 = a.lowerBound;
      t2 = b.upperBound;
      var d2X = t1.x - t2.x;
      var d2Y = t1.y - t2.y;
      if (d1X > 0.0 || d1Y > 0.0) return false;
      if (d2X > 0.0 || d2Y > 0.0) return false;
      return true;
   }
   Box2D.postDefs.push(function () {
      Box2D.Collision.b2Collision.s_incidentEdge = b2Collision.MakeClipPointVector();
      Box2D.Collision.b2Collision.s_clipPoints1 = b2Collision.MakeClipPointVector();
      Box2D.Collision.b2Collision.s_clipPoints2 = b2Collision.MakeClipPointVector();
      Box2D.Collision.b2Collision.s_edgeAO = new Vector_a2j_Number(1);
      Box2D.Collision.b2Collision.s_edgeBO = new Vector_a2j_Number(1);
      Box2D.Collision.b2Collision.s_localTangent = new b2Vec2();
      Box2D.Collision.b2Collision.s_localNormal = new b2Vec2();
      Box2D.Collision.b2Collision.s_planePoint = new b2Vec2();
      Box2D.Collision.b2Collision.s_normal = new b2Vec2();
      Box2D.Collision.b2Collision.s_tangent = new b2Vec2();
      Box2D.Collision.b2Collision.s_tangent2 = new b2Vec2();
      Box2D.Collision.b2Collision.s_v11 = new b2Vec2();
      Box2D.Collision.b2Collision.s_v12 = new b2Vec2();
      Box2D.Collision.b2Collision.b2CollidePolyTempVec = new b2Vec2();
      Box2D.Collision.b2Collision.b2_nullFeature = 0x000000ff;
   });
   b2ContactID.b2ContactID = function () {
      this.features = new Features();
   };
   b2ContactID.prototype.b2ContactID = function () {
      this.features._m_id = this;
   }
   b2ContactID.prototype.Set = function (id) {
      this.key = id._key;
   }
   b2ContactID.prototype.Copy = function () {
      var id = new b2ContactID();
      id.key = this.key;
      return id;
   }
   Object.defineProperty(b2ContactID.prototype, 'key', {
      enumerable: false,
      configurable: true,
      get: function () {
         return this._key;
      }
   });
   Object.defineProperty(b2ContactID.prototype, 'key', {
      enumerable: false,
      configurable: true,
      set: function (value) {
         if (value === undefined) value = 0;
         this._key = value;
         this.features._referenceEdge = this._key & 0x000000ff;
         this.features._incidentEdge = ((this._key & 0x0000ff00) >> 8) & 0x000000ff;
         this.features._incidentVertex = ((this._key & 0x00ff0000) >> 16) & 0x000000ff;
         this.features._flip = ((this._key & 0xff000000) >> 24) & 0x000000ff;
      }
   });
   b2ContactPoint.b2ContactPoint = function () {
      this.position = new b2Vec2();
      this.velocity = new b2Vec2();
      this.normal = new b2Vec2();
      this.id = new b2ContactID();
   };
   b2Distance.b2Distance = function () {};
   b2Distance.Distance = function (output, cache, input) {
      ++b2Distance.b2_gjkCalls;
      var proxyA = input.proxyA;
      var proxyB = input.proxyB;
      var transformA = input.transformA;
      var transformB = input.transformB;
      var simplex = b2Distance.s_simplex;
      simplex.ReadCache(cache, proxyA, transformA, proxyB, transformB);
      var vertices = simplex.m_vertices;
      var k_maxIters = 20;
      var saveA = b2Distance.s_saveA;
      var saveB = b2Distance.s_saveB;
      var saveCount = 0;
      var closestPoint = simplex.GetClosestPoint();
      var distanceSqr1 = closestPoint.LengthSquared();
      var distanceSqr2 = distanceSqr1;
      var i = 0;
      var p;
      var iter = 0;
      while (iter < k_maxIters) {
         saveCount = simplex.m_count;
         for (i = 0;
         i < saveCount; i++) {
            saveA[i] = vertices[i].indexA;
            saveB[i] = vertices[i].indexB;
         }
         switch (simplex.m_count) {
         case 1:
            break;
         case 2:
            simplex.Solve2();
            break;
         case 3:
            simplex.Solve3();
            break;
         default:
            b2Settings.b2Assert(false);
         }
         if (simplex.m_count == 3) {
            break;
         }
         p = simplex.GetClosestPoint();
         distanceSqr2 = p.LengthSquared();
         if (distanceSqr2 > distanceSqr1) {}
         distanceSqr1 = distanceSqr2;
         var d = simplex.GetSearchDirection();
         if (d.LengthSquared() < Number.MIN_VALUE * Number.MIN_VALUE) {
            break;
         }
         var vertex = vertices[simplex.m_count];
         vertex.indexA = proxyA.GetSupport(b2Math.MulTMV(transformA.R, d.GetNegative()));
         vertex.wA = b2Math.MulX(transformA, proxyA.GetVertex(vertex.indexA));
         vertex.indexB = proxyB.GetSupport(b2Math.MulTMV(transformB.R, d));
         vertex.wB = b2Math.MulX(transformB, proxyB.GetVertex(vertex.indexB));
         vertex.w = b2Math.SubtractVV(vertex.wB, vertex.wA);
         ++iter;
         ++b2Distance.b2_gjkIters;
         var duplicate = false;
         for (i = 0;
         i < saveCount; i++) {
            if (vertex.indexA == saveA[i] && vertex.indexB == saveB[i]) {
               duplicate = true;
               break;
            }
         }
         if (duplicate) {
            break;
         }++simplex.m_count;
      }
      b2Distance.b2_gjkMaxIters = b2Math.Max(b2Distance.b2_gjkMaxIters, iter);
      simplex.GetWitnessPoints(output.pointA, output.pointB);
      output.distance = b2Math.SubtractVV(output.pointA, output.pointB).Length();
      output.iterations = iter;
      simplex.WriteCache(cache);
      if (input.useRadii) {
         var rA = proxyA.m_radius;
         var rB = proxyB.m_radius;
         if (output.distance > rA + rB && output.distance > Number.MIN_VALUE) {
            output.distance -= rA + rB;
            var normal = b2Math.SubtractVV(output.pointB, output.pointA);
            normal.Normalize();
            output.pointA.x += rA * normal.x;
            output.pointA.y += rA * normal.y;
            output.pointB.x -= rB * normal.x;
            output.pointB.y -= rB * normal.y;
         }
         else {
            p = new b2Vec2();
            p.x = .5 * (output.pointA.x + output.pointB.x);
            p.y = .5 * (output.pointA.y + output.pointB.y);
            output.pointA.x = output.pointB.x = p.x;
            output.pointA.y = output.pointB.y = p.y;
            output.distance = 0.0;
         }
      }
   }
   Box2D.postDefs.push(function () {
      Box2D.Collision.b2Distance.s_simplex = new b2Simplex();
      Box2D.Collision.b2Distance.s_saveA = new Vector_a2j_Number(3);
      Box2D.Collision.b2Distance.s_saveB = new Vector_a2j_Number(3);
   });
   b2DistanceInput.b2DistanceInput = function () {};
   b2DistanceOutput.b2DistanceOutput = function () {
      this.pointA = new b2Vec2();
      this.pointB = new b2Vec2();
   };
   b2DistanceProxy.b2DistanceProxy = function () {};
   b2DistanceProxy.prototype.Set = function (shape) {
      switch (shape.GetType()) {
      case b2Shape.e_circleShape:
         {
            var circle = (shape instanceof b2CircleShape ? shape : null);
            this.m_vertices = new Vector(1, true);
            this.m_vertices[0] = circle.m_p;
            this.m_count = 1;
            this.m_radius = circle.m_radius;
         }
         break;
      case b2Shape.e_polygonShape:
         {
            var polygon = (shape instanceof b2PolygonShape ? shape : null);
            this.m_vertices = polygon.m_vertices;
            this.m_count = polygon.m_vertexCount;
            this.m_radius = polygon.m_radius;
         }
         break;
      default:
         b2Settings.b2Assert(false);
      }
   }
   b2DistanceProxy.prototype.GetSupport = function (d) {
      var bestIndex = 0;
      var bestValue = this.m_vertices[0].x * d.x + this.m_vertices[0].y * d.y;
      for (var i = 1; i < this.m_count; ++i) {
         var value = this.m_vertices[i].x * d.x + this.m_vertices[i].y * d.y;
         if (value > bestValue) {
            bestIndex = i;
            bestValue = value;
         }
      }
      return bestIndex;
   }
   b2DistanceProxy.prototype.GetSupportVertex = function (d) {
      var bestIndex = 0;
      var bestValue = this.m_vertices[0].x * d.x + this.m_vertices[0].y * d.y;
      for (var i = 1; i < this.m_count; ++i) {
         var value = this.m_vertices[i].x * d.x + this.m_vertices[i].y * d.y;
         if (value > bestValue) {
            bestIndex = i;
            bestValue = value;
         }
      }
      return this.m_vertices[bestIndex];
   }
   b2DistanceProxy.prototype.GetVertexCount = function () {
      return this.m_count;
   }
   b2DistanceProxy.prototype.GetVertex = function (index) {
      if (index === undefined) index = 0;
      b2Settings.b2Assert(0 <= index && index < this.m_count);
      return this.m_vertices[index];
   }
   b2DynamicTree.b2DynamicTree = function () {};
   b2DynamicTree.prototype.b2DynamicTree = function () {
      this.m_root = null;
      this.m_freeList = null;
      this.m_path = 0;
      this.m_insertionCount = 0;
   }
   b2DynamicTree.prototype.CreateProxy = function (aabb, userData) {
      var node = this.AllocateNode();
      var extendX = b2Settings.b2_aabbExtension;
      var extendY = b2Settings.b2_aabbExtension;
      node.aabb.lowerBound.x = aabb.lowerBound.x - extendX;
      node.aabb.lowerBound.y = aabb.lowerBound.y - extendY;
      node.aabb.upperBound.x = aabb.upperBound.x + extendX;
      node.aabb.upperBound.y = aabb.upperBound.y + extendY;
      node.userData = userData;
      this.InsertLeaf(node);
      return node;
   }
   b2DynamicTree.prototype.DestroyProxy = function (proxy) {
      this.RemoveLeaf(proxy);
      this.FreeNode(proxy);
   }
   b2DynamicTree.prototype.MoveProxy = function (proxy, aabb, displacement) {
      b2Settings.b2Assert(proxy.IsLeaf());
      if (proxy.aabb.Contains(aabb)) {
         return false;
      }
      this.RemoveLeaf(proxy);
      var extendX = b2Settings.b2_aabbExtension + b2Settings.b2_aabbMultiplier * (displacement.x > 0 ? displacement.x : (-displacement.x));
      var extendY = b2Settings.b2_aabbExtension + b2Settings.b2_aabbMultiplier * (displacement.y > 0 ? displacement.y : (-displacement.y));
      proxy.aabb.lowerBound.x = aabb.lowerBound.x - extendX;
      proxy.aabb.lowerBound.y = aabb.lowerBound.y - extendY;
      proxy.aabb.upperBound.x = aabb.upperBound.x + extendX;
      proxy.aabb.upperBound.y = aabb.upperBound.y + extendY;
      this.InsertLeaf(proxy);
      return true;
   }
   b2DynamicTree.prototype.Rebalance = function (iterations) {
      if (iterations === undefined) iterations = 0;
      if (this.m_root == null) return;
      for (var i = 0; i < iterations; i++) {
         var node = this.m_root;
         var bit = 0;
         while (node.IsLeaf() == false) {
            node = (this.m_path >> bit) & 1 ? node.child2 : node.child1;
            bit = (bit + 1) & 31;
         }++this.m_path;
         this.RemoveLeaf(node);
         this.InsertLeaf(node);
      }
   }
   b2DynamicTree.prototype.GetFatAABB = function (proxy) {
      return proxy.aabb;
   }
   b2DynamicTree.prototype.GetUserData = function (proxy) {
      return proxy.userData;
   }
   b2DynamicTree.prototype.Query = function (callback, aabb) {
      if (this.m_root == null) return;
      var stack = new Vector();
      var count = 0;
      stack[count++] = this.m_root;
      while (count > 0) {
         var node = stack[--count];
         if (node.aabb.TestOverlap(aabb)) {
            if (node.IsLeaf()) {
               var proceed = callback(node);
               if (!proceed) return;
            }
            else {
               stack[count++] = node.child1;
               stack[count++] = node.child2;
            }
         }
      }
   }
   b2DynamicTree.prototype.RayCast = function (callback, input) {
      if (this.m_root == null) return;
      var p1 = input.p1;
      var p2 = input.p2;
      var r = b2Math.SubtractVV(p1, p2);
      r.Normalize();
      var v = b2Math.CrossFV(1.0, r);
      var abs_v = b2Math.AbsV(v);
      var maxFraction = input.maxFraction;
      var segmentAABB = new b2AABB();
      var tX = 0;
      var tY = 0; {
         tX = p1.x + maxFraction * (p2.x - p1.x);
         tY = p1.y + maxFraction * (p2.y - p1.y);
         segmentAABB.lowerBound.x = Math.min(p1.x, tX);
         segmentAABB.lowerBound.y = Math.min(p1.y, tY);
         segmentAABB.upperBound.x = Math.max(p1.x, tX);
         segmentAABB.upperBound.y = Math.max(p1.y, tY);
      }
      var stack = new Vector();
      var count = 0;
      stack[count++] = this.m_root;
      while (count > 0) {
         var node = stack[--count];
         if (node.aabb.TestOverlap(segmentAABB) == false) {
            continue;
         }
         var c = node.aabb.GetCenter();
         var h = node.aabb.GetExtents();
         var separation = Math.abs(v.x * (p1.x - c.x) + v.y * (p1.y - c.y)) - abs_v.x * h.x - abs_v.y * h.y;
         if (separation > 0.0) continue;
         if (node.IsLeaf()) {
            var subInput = new b2RayCastInput();
            subInput.p1 = input.p1;
            subInput.p2 = input.p2;
            subInput.maxFraction = input.maxFraction;
            maxFraction = callback(subInput, node);
            if (maxFraction == 0.0) return;
            if (maxFraction > 0.0) {
               tX = p1.x + maxFraction * (p2.x - p1.x);
               tY = p1.y + maxFraction * (p2.y - p1.y);
               segmentAABB.lowerBound.x = Math.min(p1.x, tX);
               segmentAABB.lowerBound.y = Math.min(p1.y, tY);
               segmentAABB.upperBound.x = Math.max(p1.x, tX);
               segmentAABB.upperBound.y = Math.max(p1.y, tY);
            }
         }
         else {
            stack[count++] = node.child1;
            stack[count++] = node.child2;
         }
      }
   }
   b2DynamicTree.prototype.AllocateNode = function () {
      if (this.m_freeList) {
         var node = this.m_freeList;
         this.m_freeList = node.parent;
         node.parent = null;
         node.child1 = null;
         node.child2 = null;
         return node;
      }
      return new b2DynamicTreeNode();
   }
   b2DynamicTree.prototype.FreeNode = function (node) {
      node.parent = this.m_freeList;
      this.m_freeList = node;
   }
   b2DynamicTree.prototype.InsertLeaf = function (leaf) {
      ++this.m_insertionCount;
      if (this.m_root == null) {
         this.m_root = leaf;
         this.m_root.parent = null;
         return;
      }
      var center = leaf.aabb.GetCenter();
      var sibling = this.m_root;
      if (sibling.IsLeaf() == false) {
         do {
            var child1 = sibling.child1;
            var child2 = sibling.child2;
            var norm1 = Math.abs((child1.aabb.lowerBound.x + child1.aabb.upperBound.x) / 2 - center.x) + Math.abs((child1.aabb.lowerBound.y + child1.aabb.upperBound.y) / 2 - center.y);
            var norm2 = Math.abs((child2.aabb.lowerBound.x + child2.aabb.upperBound.x) / 2 - center.x) + Math.abs((child2.aabb.lowerBound.y + child2.aabb.upperBound.y) / 2 - center.y);
            if (norm1 < norm2) {
               sibling = child1;
            }
            else {
               sibling = child2;
            }
         }
         while (sibling.IsLeaf() == false)
      }
      var node1 = sibling.parent;
      var node2 = this.AllocateNode();
      node2.parent = node1;
      node2.userData = null;
      node2.aabb.Combine(leaf.aabb, sibling.aabb);
      if (node1) {
         if (sibling.parent.child1 == sibling) {
            node1.child1 = node2;
         }
         else {
            node1.child2 = node2;
         }
         node2.child1 = sibling;
         node2.child2 = leaf;
         sibling.parent = node2;
         leaf.parent = node2;
         do {
            if (node1.aabb.Contains(node2.aabb)) break;
            node1.aabb.Combine(node1.child1.aabb, node1.child2.aabb);
            node2 = node1;
            node1 = node1.parent;
         }
         while (node1)
      }
      else {
         node2.child1 = sibling;
         node2.child2 = leaf;
         sibling.parent = node2;
         leaf.parent = node2;
         this.m_root = node2;
      }
   }
   b2DynamicTree.prototype.RemoveLeaf = function (leaf) {
      if (leaf == this.m_root) {
         this.m_root = null;
         return;
      }
      var node2 = leaf.parent;
      var node1 = node2.parent;
      var sibling;
      if (node2.child1 == leaf) {
         sibling = node2.child2;
      }
      else {
         sibling = node2.child1;
      }
      if (node1) {
         if (node1.child1 == node2) {
            node1.child1 = sibling;
         }
         else {
            node1.child2 = sibling;
         }
         sibling.parent = node1;
         this.FreeNode(node2);
         while (node1) {
            var oldAABB = node1.aabb;
            node1.aabb = b2AABB.Combine(node1.child1.aabb, node1.child2.aabb);
            if (oldAABB.Contains(node1.aabb)) break;
            node1 = node1.parent;
         }
      }
      else {
         this.m_root = sibling;
         sibling.parent = null;
         this.FreeNode(node2);
      }
   }
   b2DynamicTreeBroadPhase.b2DynamicTreeBroadPhase = function () {
      this.m_tree = new b2DynamicTree();
      this.m_moveBuffer = new Vector();
      this.m_pairBuffer = new Vector();
      this.m_pairCount = 0;
   };
   b2DynamicTreeBroadPhase.prototype.CreateProxy = function (aabb, userData) {
      var proxy = this.m_tree.CreateProxy(aabb, userData);
      ++this.m_proxyCount;
      this.BufferMove(proxy);
      return proxy;
   }
   b2DynamicTreeBroadPhase.prototype.DestroyProxy = function (proxy) {
      this.UnBufferMove(proxy);
      --this.m_proxyCount;
      this.m_tree.DestroyProxy(proxy);
   }
   b2DynamicTreeBroadPhase.prototype.MoveProxy = function (proxy, aabb, displacement) {
      var buffer = this.m_tree.MoveProxy(proxy, aabb, displacement);
      if (buffer) {
         this.BufferMove(proxy);
      }
   }
   b2DynamicTreeBroadPhase.prototype.TestOverlap = function (proxyA, proxyB) {
      var aabbA = this.m_tree.GetFatAABB(proxyA);
      var aabbB = this.m_tree.GetFatAABB(proxyB);
      return aabbA.TestOverlap(aabbB);
   }
   b2DynamicTreeBroadPhase.prototype.GetUserData = function (proxy) {
      return this.m_tree.GetUserData(proxy);
   }
   b2DynamicTreeBroadPhase.prototype.GetFatAABB = function (proxy) {
      return this.m_tree.GetFatAABB(proxy);
   }
   b2DynamicTreeBroadPhase.prototype.GetProxyCount = function () {
      return this.m_proxyCount;
   }
   b2DynamicTreeBroadPhase.prototype.UpdatePairs = function (callback) {
      var __this = this;
      __this.m_pairCount = 0;
      var i = 0,
         queryProxy;
      for (i = 0;
      i < __this.m_moveBuffer.length; ++i) {
         queryProxy = __this.m_moveBuffer[i];

         function QueryCallback(proxy) {
            if (proxy == queryProxy) return true;
            if (__this.m_pairCount == __this.m_pairBuffer.length) {
               __this.m_pairBuffer[__this.m_pairCount] = new b2DynamicTreePair();
            }
            var pair = __this.m_pairBuffer[__this.m_pairCount];
            pair.proxyA = proxy < queryProxy ? proxy : queryProxy;
            pair.proxyB = proxy >= queryProxy ? proxy : queryProxy;++__this.m_pairCount;
            return true;
         };
         var fatAABB = __this.m_tree.GetFatAABB(queryProxy);
         __this.m_tree.Query(QueryCallback, fatAABB);
      }
      __this.m_moveBuffer.length = 0;
      for (var i = 0; i < __this.m_pairCount;) {
         var primaryPair = __this.m_pairBuffer[i];
         var userDataA = __this.m_tree.GetUserData(primaryPair.proxyA);
         var userDataB = __this.m_tree.GetUserData(primaryPair.proxyB);
         callback(userDataA, userDataB);
         ++i;
         while (i < __this.m_pairCount) {
            var pair = __this.m_pairBuffer[i];
            if (pair.proxyA != primaryPair.proxyA || pair.proxyB != primaryPair.proxyB) {
               break;
            }++i;
         }
      }
   }
   b2DynamicTreeBroadPhase.prototype.Query = function (callback, aabb) {
      this.m_tree.Query(callback, aabb);
   }
   b2DynamicTreeBroadPhase.prototype.RayCast = function (callback, input) {
      this.m_tree.RayCast(callback, input);
   }
   b2DynamicTreeBroadPhase.prototype.Validate = function () {}
   b2DynamicTreeBroadPhase.prototype.Rebalance = function (iterations) {
      if (iterations === undefined) iterations = 0;
      this.m_tree.Rebalance(iterations);
   }
   b2DynamicTreeBroadPhase.prototype.BufferMove = function (proxy) {
      this.m_moveBuffer[this.m_moveBuffer.length] = proxy;
   }
   b2DynamicTreeBroadPhase.prototype.UnBufferMove = function (proxy) {
      var i = parseInt(this.m_moveBuffer.indexOf(proxy));
      this.m_moveBuffer.splice(i, 1);
   }
   b2DynamicTreeBroadPhase.prototype.ComparePairs = function (pair1, pair2) {
      return 0;
   }
   b2DynamicTreeBroadPhase.__implements = {};
   b2DynamicTreeBroadPhase.__implements[IBroadPhase] = true;
   b2DynamicTreeNode.b2DynamicTreeNode = function () {
      this.aabb = new b2AABB();
   };
   b2DynamicTreeNode.prototype.IsLeaf = function () {
      return this.child1 == null;
   }
   b2DynamicTreePair.b2DynamicTreePair = function () {};
   b2Manifold.b2Manifold = function () {
      this.m_pointCount = 0;
   };
   b2Manifold.prototype.b2Manifold = function () {
      this.m_points = new Vector(b2Settings.b2_maxManifoldPoints);
      for (var i = 0; i < b2Settings.b2_maxManifoldPoints; i++) {
         this.m_points[i] = new b2ManifoldPoint();
      }
      this.m_localPlaneNormal = new b2Vec2();
      this.m_localPoint = new b2Vec2();
   }
   b2Manifold.prototype.Reset = function () {
      for (var i = 0; i < b2Settings.b2_maxManifoldPoints; i++) {
         ((this.m_points[i] instanceof b2ManifoldPoint ? this.m_points[i] : null)).Reset();
      }
      this.m_localPlaneNormal.SetZero();
      this.m_localPoint.SetZero();
      this.m_type = 0;
      this.m_pointCount = 0;
   }
   b2Manifold.prototype.Set = function (m) {
      this.m_pointCount = m.m_pointCount;
      for (var i = 0; i < b2Settings.b2_maxManifoldPoints; i++) {
         ((this.m_points[i] instanceof b2ManifoldPoint ? this.m_points[i] : null)).Set(m.m_points[i]);
      }
      this.m_localPlaneNormal.SetV(m.m_localPlaneNormal);
      this.m_localPoint.SetV(m.m_localPoint);
      this.m_type = m.m_type;
   }
   b2Manifold.prototype.Copy = function () {
      var copy = new b2Manifold();
      copy.Set(this);
      return copy;
   }
   Box2D.postDefs.push(function () {
      Box2D.Collision.b2Manifold.e_circles = 0x0001;
      Box2D.Collision.b2Manifold.e_faceA = 0x0002;
      Box2D.Collision.b2Manifold.e_faceB = 0x0004;
   });
   b2ManifoldPoint.b2ManifoldPoint = function () {
      this.m_localPoint = new b2Vec2();
      this.m_id = new b2ContactID();
   };
   b2ManifoldPoint.prototype.b2ManifoldPoint = function () {
      this.Reset();
   }
   b2ManifoldPoint.prototype.Reset = function () {
      this.m_localPoint.SetZero();
      this.m_normalImpulse = 0.0;
      this.m_tangentImpulse = 0.0;
      this.m_id.key = 0;
   }
   b2ManifoldPoint.prototype.Set = function (m) {
      this.m_localPoint.SetV(m.m_localPoint);
      this.m_normalImpulse = m.m_normalImpulse;
      this.m_tangentImpulse = m.m_tangentImpulse;
      this.m_id.Set(m.m_id);
   }
   b2Point.b2Point = function () {
      this.p = new b2Vec2();
   };
   b2Point.prototype.Support = function (xf, vX, vY) {
      if (vX === undefined) vX = 0;
      if (vY === undefined) vY = 0;
      return this.p;
   }
   b2Point.prototype.GetFirstVertex = function (xf) {
      return this.p;
   }
   b2RayCastInput.b2RayCastInput = function () {
      this.p1 = new b2Vec2();
      this.p2 = new b2Vec2();
   };
   b2RayCastInput.prototype.b2RayCastInput = function (p1, p2, maxFraction) {
      if (p1 === undefined) p1 = null;
      if (p2 === undefined) p2 = null;
      if (maxFraction === undefined) maxFraction = 1;
      if (p1) this.p1.SetV(p1);
      if (p2) this.p2.SetV(p2);
      this.maxFraction = maxFraction;
   }
   b2RayCastOutput.b2RayCastOutput = function () {
      this.normal = new b2Vec2();
   };
   b2Segment.b2Segment = function () {
      this.p1 = new b2Vec2();
      this.p2 = new b2Vec2();
   };
   b2Segment.prototype.TestSegment = function (lambda, normal, segment, maxLambda) {
      if (maxLambda === undefined) maxLambda = 0;
      var s = segment.p1;
      var rX = segment.p2.x - s.x;
      var rY = segment.p2.y - s.y;
      var dX = this.p2.x - this.p1.x;
      var dY = this.p2.y - this.p1.y;
      var nX = dY;
      var nY = (-dX);
      var k_slop = 100.0 * Number.MIN_VALUE;
      var denom = (-(rX * nX + rY * nY));
      if (denom > k_slop) {
         var bX = s.x - this.p1.x;
         var bY = s.y - this.p1.y;
         var a = (bX * nX + bY * nY);
         if (0.0 <= a && a <= maxLambda * denom) {
            var mu2 = (-rX * bY) + rY * bX;
            if ((-k_slop * denom) <= mu2 && mu2 <= denom * (1.0 + k_slop)) {
               a /= denom;
               var nLen = Math.sqrt(nX * nX + nY * nY);
               nX /= nLen;
               nY /= nLen;
               lambda[0] = a;
               normal.Set(nX, nY);
               return true;
            }
         }
      }
      return false;
   }
   b2Segment.prototype.Extend = function (aabb) {
      this.ExtendForward(aabb);
      this.ExtendBackward(aabb);
   }
   b2Segment.prototype.ExtendForward = function (aabb) {
      var dX = this.p2.x - this.p1.x;
      var dY = this.p2.y - this.p1.y;
      var lambda = Math.min(dX > 0 ? (aabb.upperBound.x - this.p1.x) / dX : dX < 0 ? (aabb.lowerBound.x - this.p1.x) / dX : Number.POSITIVE_INFINITY,
      dY > 0 ? (aabb.upperBound.y - this.p1.y) / dY : dY < 0 ? (aabb.lowerBound.y - this.p1.y) / dY : Number.POSITIVE_INFINITY);
      this.p2.x = this.p1.x + dX * lambda;
      this.p2.y = this.p1.y + dY * lambda;
   }
   b2Segment.prototype.ExtendBackward = function (aabb) {
      var dX = (-this.p2.x) + this.p1.x;
      var dY = (-this.p2.y) + this.p1.y;
      var lambda = Math.min(dX > 0 ? (aabb.upperBound.x - this.p2.x) / dX : dX < 0 ? (aabb.lowerBound.x - this.p2.x) / dX : Number.POSITIVE_INFINITY,
      dY > 0 ? (aabb.upperBound.y - this.p2.y) / dY : dY < 0 ? (aabb.lowerBound.y - this.p2.y) / dY : Number.POSITIVE_INFINITY);
      this.p1.x = this.p2.x + dX * lambda;
      this.p1.y = this.p2.y + dY * lambda;
   }
   b2SeparationFunction.b2SeparationFunction = function () {
      this.m_localPoint = new b2Vec2();
      this.m_axis = new b2Vec2();
   };
   b2SeparationFunction.prototype.Initialize = function (cache, proxyA, transformA, proxyB, transformB) {
      this.m_proxyA = proxyA;
      this.m_proxyB = proxyB;
      var count = parseInt(cache.count);
      b2Settings.b2Assert(0 < count && count < 3);
      var localPointA;
      var localPointA1;
      var localPointA2;
      var localPointB;
      var localPointB1;
      var localPointB2;
      var pointAX = 0;
      var pointAY = 0;
      var pointBX = 0;
      var pointBY = 0;
      var normalX = 0;
      var normalY = 0;
      var tMat;
      var tVec;
      var s = 0;
      var sgn = 0;
      if (count == 1) {
         this.m_type = b2SeparationFunction.e_points;
         localPointA = this.m_proxyA.GetVertex(cache.indexA[0]);
         localPointB = this.m_proxyB.GetVertex(cache.indexB[0]);
         tVec = localPointA;
         tMat = transformA.R;
         pointAX = transformA.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
         pointAY = transformA.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
         tVec = localPointB;
         tMat = transformB.R;
         pointBX = transformB.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
         pointBY = transformB.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
         this.m_axis.x = pointBX - pointAX;
         this.m_axis.y = pointBY - pointAY;
         this.m_axis.Normalize();
      }
      else if (cache.indexB[0] == cache.indexB[1]) {
         this.m_type = b2SeparationFunction.e_faceA;
         localPointA1 = this.m_proxyA.GetVertex(cache.indexA[0]);
         localPointA2 = this.m_proxyA.GetVertex(cache.indexA[1]);
         localPointB = this.m_proxyB.GetVertex(cache.indexB[0]);
         this.m_localPoint.x = 0.5 * (localPointA1.x + localPointA2.x);
         this.m_localPoint.y = 0.5 * (localPointA1.y + localPointA2.y);
         this.m_axis = b2Math.CrossVF(b2Math.SubtractVV(localPointA2, localPointA1), 1.0);
         this.m_axis.Normalize();
         tVec = this.m_axis;
         tMat = transformA.R;
         normalX = tMat.col1.x * tVec.x + tMat.col2.x * tVec.y;
         normalY = tMat.col1.y * tVec.x + tMat.col2.y * tVec.y;
         tVec = this.m_localPoint;
         tMat = transformA.R;
         pointAX = transformA.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
         pointAY = transformA.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
         tVec = localPointB;
         tMat = transformB.R;
         pointBX = transformB.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
         pointBY = transformB.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
         s = (pointBX - pointAX) * normalX + (pointBY - pointAY) * normalY;
         if (s < 0.0) {
            this.m_axis.NegativeSelf();
         }
      }
      else if (cache.indexA[0] == cache.indexA[0]) {
         this.m_type = b2SeparationFunction.e_faceB;
         localPointB1 = this.m_proxyB.GetVertex(cache.indexB[0]);
         localPointB2 = this.m_proxyB.GetVertex(cache.indexB[1]);
         localPointA = this.m_proxyA.GetVertex(cache.indexA[0]);
         this.m_localPoint.x = 0.5 * (localPointB1.x + localPointB2.x);
         this.m_localPoint.y = 0.5 * (localPointB1.y + localPointB2.y);
         this.m_axis = b2Math.CrossVF(b2Math.SubtractVV(localPointB2, localPointB1), 1.0);
         this.m_axis.Normalize();
         tVec = this.m_axis;
         tMat = transformB.R;
         normalX = tMat.col1.x * tVec.x + tMat.col2.x * tVec.y;
         normalY = tMat.col1.y * tVec.x + tMat.col2.y * tVec.y;
         tVec = this.m_localPoint;
         tMat = transformB.R;
         pointBX = transformB.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
         pointBY = transformB.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
         tVec = localPointA;
         tMat = transformA.R;
         pointAX = transformA.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
         pointAY = transformA.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
         s = (pointAX - pointBX) * normalX + (pointAY - pointBY) * normalY;
         if (s < 0.0) {
            this.m_axis.NegativeSelf();
         }
      }
      else {
         localPointA1 = this.m_proxyA.GetVertex(cache.indexA[0]);
         localPointA2 = this.m_proxyA.GetVertex(cache.indexA[1]);
         localPointB1 = this.m_proxyB.GetVertex(cache.indexB[0]);
         localPointB2 = this.m_proxyB.GetVertex(cache.indexB[1]);
         var pA = b2Math.MulX(transformA, localPointA);
         var dA = b2Math.MulMV(transformA.R, b2Math.SubtractVV(localPointA2, localPointA1));
         var pB = b2Math.MulX(transformB, localPointB);
         var dB = b2Math.MulMV(transformB.R, b2Math.SubtractVV(localPointB2, localPointB1));
         var a = dA.x * dA.x + dA.y * dA.y;
         var e = dB.x * dB.x + dB.y * dB.y;
         var r = b2Math.SubtractVV(dB, dA);
         var c = dA.x * r.x + dA.y * r.y;
         var f = dB.x * r.x + dB.y * r.y;
         var b = dA.x * dB.x + dA.y * dB.y;
         var denom = a * e - b * b;
         s = 0.0;
         if (denom != 0.0) {
            s = b2Math.Clamp((b * f - c * e) / denom, 0.0, 1.0);
         }
         var t = (b * s + f) / e;
         if (t < 0.0) {
            t = 0.0;
            s = b2Math.Clamp((b - c) / a, 0.0, 1.0);
         }
         localPointA = new b2Vec2();
         localPointA.x = localPointA1.x + s * (localPointA2.x - localPointA1.x);
         localPointA.y = localPointA1.y + s * (localPointA2.y - localPointA1.y);
         localPointB = new b2Vec2();
         localPointB.x = localPointB1.x + s * (localPointB2.x - localPointB1.x);
         localPointB.y = localPointB1.y + s * (localPointB2.y - localPointB1.y);
         if (s == 0.0 || s == 1.0) {
            this.m_type = b2SeparationFunction.e_faceB;
            this.m_axis = b2Math.CrossVF(b2Math.SubtractVV(localPointB2, localPointB1), 1.0);
            this.m_axis.Normalize();
            this.m_localPoint = localPointB;
            tVec = this.m_axis;
            tMat = transformB.R;
            normalX = tMat.col1.x * tVec.x + tMat.col2.x * tVec.y;
            normalY = tMat.col1.y * tVec.x + tMat.col2.y * tVec.y;
            tVec = this.m_localPoint;
            tMat = transformB.R;
            pointBX = transformB.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
            pointBY = transformB.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
            tVec = localPointA;
            tMat = transformA.R;
            pointAX = transformA.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
            pointAY = transformA.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
            sgn = (pointAX - pointBX) * normalX + (pointAY - pointBY) * normalY;
            if (s < 0.0) {
               this.m_axis.NegativeSelf();
            }
         }
         else {
            this.m_type = b2SeparationFunction.e_faceA;
            this.m_axis = b2Math.CrossVF(b2Math.SubtractVV(localPointA2, localPointA1), 1.0);
            this.m_localPoint = localPointA;
            tVec = this.m_axis;
            tMat = transformA.R;
            normalX = tMat.col1.x * tVec.x + tMat.col2.x * tVec.y;
            normalY = tMat.col1.y * tVec.x + tMat.col2.y * tVec.y;
            tVec = this.m_localPoint;
            tMat = transformA.R;
            pointAX = transformA.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
            pointAY = transformA.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
            tVec = localPointB;
            tMat = transformB.R;
            pointBX = transformB.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
            pointBY = transformB.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
            sgn = (pointBX - pointAX) * normalX + (pointBY - pointAY) * normalY;
            if (s < 0.0) {
               this.m_axis.NegativeSelf();
            }
         }
      }
   }
   b2SeparationFunction.prototype.Evaluate = function (transformA, transformB) {
      var axisA;
      var axisB;
      var localPointA;
      var localPointB;
      var pointA;
      var pointB;
      var seperation = 0;
      var normal;
      switch (this.m_type) {
      case b2SeparationFunction.e_points:
         {
            axisA = b2Math.MulTMV(transformA.R, this.m_axis);
            axisB = b2Math.MulTMV(transformB.R, this.m_axis.GetNegative());
            localPointA = this.m_proxyA.GetSupportVertex(axisA);
            localPointB = this.m_proxyB.GetSupportVertex(axisB);
            pointA = b2Math.MulX(transformA, localPointA);
            pointB = b2Math.MulX(transformB, localPointB);
            seperation = (pointB.x - pointA.x) * this.m_axis.x + (pointB.y - pointA.y) * this.m_axis.y;
            return seperation;
         }
      case b2SeparationFunction.e_faceA:
         {
            normal = b2Math.MulMV(transformA.R, this.m_axis);
            pointA = b2Math.MulX(transformA, this.m_localPoint);
            axisB = b2Math.MulTMV(transformB.R, normal.GetNegative());
            localPointB = this.m_proxyB.GetSupportVertex(axisB);
            pointB = b2Math.MulX(transformB, localPointB);
            seperation = (pointB.x - pointA.x) * normal.x + (pointB.y - pointA.y) * normal.y;
            return seperation;
         }
      case b2SeparationFunction.e_faceB:
         {
            normal = b2Math.MulMV(transformB.R, this.m_axis);
            pointB = b2Math.MulX(transformB, this.m_localPoint);
            axisA = b2Math.MulTMV(transformA.R, normal.GetNegative());
            localPointA = this.m_proxyA.GetSupportVertex(axisA);
            pointA = b2Math.MulX(transformA, localPointA);
            seperation = (pointA.x - pointB.x) * normal.x + (pointA.y - pointB.y) * normal.y;
            return seperation;
         }
      default:
         b2Settings.b2Assert(false);
         return 0.0;
      }
   }
   Box2D.postDefs.push(function () {
      Box2D.Collision.b2SeparationFunction.e_points = 0x01;
      Box2D.Collision.b2SeparationFunction.e_faceA = 0x02;
      Box2D.Collision.b2SeparationFunction.e_faceB = 0x04;
   });
   b2Simplex.b2Simplex = function () {
      this.m_v1 = new b2SimplexVertex();
      this.m_v2 = new b2SimplexVertex();
      this.m_v3 = new b2SimplexVertex();
      this.m_vertices = new Vector(3);
   };
   b2Simplex.prototype.b2Simplex = function () {
      this.m_vertices[0] = this.m_v1;
      this.m_vertices[1] = this.m_v2;
      this.m_vertices[2] = this.m_v3;
   }
   b2Simplex.prototype.ReadCache = function (cache, proxyA, transformA, proxyB, transformB) {
      b2Settings.b2Assert(0 <= cache.count && cache.count <= 3);
      var wALocal;
      var wBLocal;
      this.m_count = cache.count;
      var vertices = this.m_vertices;
      for (var i = 0; i < this.m_count; i++) {
         var v = vertices[i];
         v.indexA = cache.indexA[i];
         v.indexB = cache.indexB[i];
         wALocal = proxyA.GetVertex(v.indexA);
         wBLocal = proxyB.GetVertex(v.indexB);
         v.wA = b2Math.MulX(transformA, wALocal);
         v.wB = b2Math.MulX(transformB, wBLocal);
         v.w = b2Math.SubtractVV(v.wB, v.wA);
         v.a = 0;
      }
      if (this.m_count > 1) {
         var metric1 = cache.metric;
         var metric2 = this.GetMetric();
         if (metric2 < .5 * metric1 || 2.0 * metric1 < metric2 || metric2 < Number.MIN_VALUE) {
            this.m_count = 0;
         }
      }
      if (this.m_count == 0) {
         v = vertices[0];
         v.indexA = 0;
         v.indexB = 0;
         wALocal = proxyA.GetVertex(0);
         wBLocal = proxyB.GetVertex(0);
         v.wA = b2Math.MulX(transformA, wALocal);
         v.wB = b2Math.MulX(transformB, wBLocal);
         v.w = b2Math.SubtractVV(v.wB, v.wA);
         this.m_count = 1;
      }
   }
   b2Simplex.prototype.WriteCache = function (cache) {
      cache.metric = this.GetMetric();
      cache.count = Box2D.parseUInt(this.m_count);
      var vertices = this.m_vertices;
      for (var i = 0; i < this.m_count; i++) {
         cache.indexA[i] = Box2D.parseUInt(vertices[i].indexA);
         cache.indexB[i] = Box2D.parseUInt(vertices[i].indexB);
      }
   }
   b2Simplex.prototype.GetSearchDirection = function () {
      switch (this.m_count) {
      case 1:
         return this.m_v1.w.GetNegative();
      case 2:
         {
            var e12 = b2Math.SubtractVV(this.m_v2.w, this.m_v1.w);
            var sgn = b2Math.CrossVV(e12, this.m_v1.w.GetNegative());
            if (sgn > 0.0) {
               return b2Math.CrossFV(1.0, e12);
            }
            else {
               return b2Math.CrossVF(e12, 1.0);
            }
         }
      default:
         b2Settings.b2Assert(false);
         return new b2Vec2();
      }
   }
   b2Simplex.prototype.GetClosestPoint = function () {
      switch (this.m_count) {
      case 0:
         b2Settings.b2Assert(false);
         return new b2Vec2();
      case 1:
         return this.m_v1.w;
      case 2:
         return new b2Vec2(this.m_v1.a * this.m_v1.w.x + this.m_v2.a * this.m_v2.w.x, this.m_v1.a * this.m_v1.w.y + this.m_v2.a * this.m_v2.w.y);
      default:
         b2Settings.b2Assert(false);
         return new b2Vec2();
      }
   }
   b2Simplex.prototype.GetWitnessPoints = function (pA, pB) {
      switch (this.m_count) {
      case 0:
         b2Settings.b2Assert(false);
         break;
      case 1:
         pA.SetV(this.m_v1.wA);
         pB.SetV(this.m_v1.wB);
         break;
      case 2:
         pA.x = this.m_v1.a * this.m_v1.wA.x + this.m_v2.a * this.m_v2.wA.x;
         pA.y = this.m_v1.a * this.m_v1.wA.y + this.m_v2.a * this.m_v2.wA.y;
         pB.x = this.m_v1.a * this.m_v1.wB.x + this.m_v2.a * this.m_v2.wB.x;
         pB.y = this.m_v1.a * this.m_v1.wB.y + this.m_v2.a * this.m_v2.wB.y;
         break;
      case 3:
         pB.x = pA.x = this.m_v1.a * this.m_v1.wA.x + this.m_v2.a * this.m_v2.wA.x + this.m_v3.a * this.m_v3.wA.x;
         pB.y = pA.y = this.m_v1.a * this.m_v1.wA.y + this.m_v2.a * this.m_v2.wA.y + this.m_v3.a * this.m_v3.wA.y;
         break;
      default:
         b2Settings.b2Assert(false);
         break;
      }
   }
   b2Simplex.prototype.GetMetric = function () {
      switch (this.m_count) {
      case 0:
         b2Settings.b2Assert(false);
         return 0.0;
      case 1:
         return 0.0;
      case 2:
         return b2Math.SubtractVV(this.m_v1.w, this.m_v2.w).Length();
      case 3:
         return b2Math.CrossVV(b2Math.SubtractVV(this.m_v2.w, this.m_v1.w), b2Math.SubtractVV(this.m_v3.w, this.m_v1.w));
      default:
         b2Settings.b2Assert(false);
         return 0.0;
      }
   }
   b2Simplex.prototype.Solve2 = function () {
      var w1 = this.m_v1.w;
      var w2 = this.m_v2.w;
      var e12 = b2Math.SubtractVV(w2, w1);
      var d12_2 = (-(w1.x * e12.x + w1.y * e12.y));
      if (d12_2 <= 0.0) {
         this.m_v1.a = 1.0;
         this.m_count = 1;
         return;
      }
      var d12_1 = (w2.x * e12.x + w2.y * e12.y);
      if (d12_1 <= 0.0) {
         this.m_v2.a = 1.0;
         this.m_count = 1;
         this.m_v1.Set(this.m_v2);
         return;
      }
      var inv_d12 = 1.0 / (d12_1 + d12_2);
      this.m_v1.a = d12_1 * inv_d12;
      this.m_v2.a = d12_2 * inv_d12;
      this.m_count = 2;
   }
   b2Simplex.prototype.Solve3 = function () {
      var w1 = this.m_v1.w;
      var w2 = this.m_v2.w;
      var w3 = this.m_v3.w;
      var e12 = b2Math.SubtractVV(w2, w1);
      var w1e12 = b2Math.Dot(w1, e12);
      var w2e12 = b2Math.Dot(w2, e12);
      var d12_1 = w2e12;
      var d12_2 = (-w1e12);
      var e13 = b2Math.SubtractVV(w3, w1);
      var w1e13 = b2Math.Dot(w1, e13);
      var w3e13 = b2Math.Dot(w3, e13);
      var d13_1 = w3e13;
      var d13_2 = (-w1e13);
      var e23 = b2Math.SubtractVV(w3, w2);
      var w2e23 = b2Math.Dot(w2, e23);
      var w3e23 = b2Math.Dot(w3, e23);
      var d23_1 = w3e23;
      var d23_2 = (-w2e23);
      var n123 = b2Math.CrossVV(e12, e13);
      var d123_1 = n123 * b2Math.CrossVV(w2, w3);
      var d123_2 = n123 * b2Math.CrossVV(w3, w1);
      var d123_3 = n123 * b2Math.CrossVV(w1, w2);
      if (d12_2 <= 0.0 && d13_2 <= 0.0) {
         this.m_v1.a = 1.0;
         this.m_count = 1;
         return;
      }
      if (d12_1 > 0.0 && d12_2 > 0.0 && d123_3 <= 0.0) {
         var inv_d12 = 1.0 / (d12_1 + d12_2);
         this.m_v1.a = d12_1 * inv_d12;
         this.m_v2.a = d12_2 * inv_d12;
         this.m_count = 2;
         return;
      }
      if (d13_1 > 0.0 && d13_2 > 0.0 && d123_2 <= 0.0) {
         var inv_d13 = 1.0 / (d13_1 + d13_2);
         this.m_v1.a = d13_1 * inv_d13;
         this.m_v3.a = d13_2 * inv_d13;
         this.m_count = 2;
         this.m_v2.Set(this.m_v3);
         return;
      }
      if (d12_1 <= 0.0 && d23_2 <= 0.0) {
         this.m_v2.a = 1.0;
         this.m_count = 1;
         this.m_v1.Set(this.m_v2);
         return;
      }
      if (d13_1 <= 0.0 && d23_1 <= 0.0) {
         this.m_v3.a = 1.0;
         this.m_count = 1;
         this.m_v1.Set(this.m_v3);
         return;
      }
      if (d23_1 > 0.0 && d23_2 > 0.0 && d123_1 <= 0.0) {
         var inv_d23 = 1.0 / (d23_1 + d23_2);
         this.m_v2.a = d23_1 * inv_d23;
         this.m_v3.a = d23_2 * inv_d23;
         this.m_count = 2;
         this.m_v1.Set(this.m_v3);
         return;
      }
      var inv_d123 = 1.0 / (d123_1 + d123_2 + d123_3);
      this.m_v1.a = d123_1 * inv_d123;
      this.m_v2.a = d123_2 * inv_d123;
      this.m_v3.a = d123_3 * inv_d123;
      this.m_count = 3;
   }
   b2SimplexCache.b2SimplexCache = function () {
      this.indexA = new Vector_a2j_Number(3);
      this.indexB = new Vector_a2j_Number(3);
   };
   b2SimplexVertex.b2SimplexVertex = function () {};
   b2SimplexVertex.prototype.Set = function (other) {
      this.wA.SetV(other.wA);
      this.wB.SetV(other.wB);
      this.w.SetV(other.w);
      this.a = other.a;
      this.indexA = other.indexA;
      this.indexB = other.indexB;
   }
   b2TimeOfImpact.b2TimeOfImpact = function () {};
   b2TimeOfImpact.TimeOfImpact = function (input) {
      ++b2TimeOfImpact.b2_toiCalls;
      var proxyA = input.proxyA;
      var proxyB = input.proxyB;
      var sweepA = input.sweepA;
      var sweepB = input.sweepB;
      b2Settings.b2Assert(sweepA.t0 == sweepB.t0);
      b2Settings.b2Assert(1.0 - sweepA.t0 > Number.MIN_VALUE);
      var radius = proxyA.m_radius + proxyB.m_radius;
      var tolerance = input.tolerance;
      var alpha = 0.0;
      var k_maxIterations = 1000;
      var iter = 0;
      var target = 0.0;
      b2TimeOfImpact.s_cache.count = 0;
      b2TimeOfImpact.s_distanceInput.useRadii = false;
      for (;;) {
         sweepA.GetTransform(b2TimeOfImpact.s_xfA, alpha);
         sweepB.GetTransform(b2TimeOfImpact.s_xfB, alpha);
         b2TimeOfImpact.s_distanceInput.proxyA = proxyA;
         b2TimeOfImpact.s_distanceInput.proxyB = proxyB;
         b2TimeOfImpact.s_distanceInput.transformA = b2TimeOfImpact.s_xfA;
         b2TimeOfImpact.s_distanceInput.transformB = b2TimeOfImpact.s_xfB;
         b2Distance.Distance(b2TimeOfImpact.s_distanceOutput, b2TimeOfImpact.s_cache, b2TimeOfImpact.s_distanceInput);
         if (b2TimeOfImpact.s_distanceOutput.distance <= 0.0) {
            alpha = 1.0;
            break;
         }
         b2TimeOfImpact.s_fcn.Initialize(b2TimeOfImpact.s_cache, proxyA, b2TimeOfImpact.s_xfA, proxyB, b2TimeOfImpact.s_xfB);
         var separation = b2TimeOfImpact.s_fcn.Evaluate(b2TimeOfImpact.s_xfA, b2TimeOfImpact.s_xfB);
         if (separation <= 0.0) {
            alpha = 1.0;
            break;
         }
         if (iter == 0) {
            if (separation > radius) {
               target = b2Math.Max(radius - tolerance, 0.75 * radius);
            }
            else {
               target = b2Math.Max(separation - tolerance, 0.02 * radius);
            }
         }
         if (separation - target < 0.5 * tolerance) {
            if (iter == 0) {
               alpha = 1.0;
               break;
            }
            break;
         }
         var newAlpha = alpha; {
            var x1 = alpha;
            var x2 = 1.0;
            var f1 = separation;
            sweepA.GetTransform(b2TimeOfImpact.s_xfA, x2);
            sweepB.GetTransform(b2TimeOfImpact.s_xfB, x2);
            var f2 = b2TimeOfImpact.s_fcn.Evaluate(b2TimeOfImpact.s_xfA, b2TimeOfImpact.s_xfB);
            if (f2 >= target) {
               alpha = 1.0;
               break;
            }
            var rootIterCount = 0;
            for (;;) {
               var x = 0;
               if (rootIterCount & 1) {
                  x = x1 + (target - f1) * (x2 - x1) / (f2 - f1);
               }
               else {
                  x = 0.5 * (x1 + x2);
               }
               sweepA.GetTransform(b2TimeOfImpact.s_xfA, x);
               sweepB.GetTransform(b2TimeOfImpact.s_xfB, x);
               var f = b2TimeOfImpact.s_fcn.Evaluate(b2TimeOfImpact.s_xfA, b2TimeOfImpact.s_xfB);
               if (b2Math.Abs(f - target) < 0.025 * tolerance) {
                  newAlpha = x;
                  break;
               }
               if (f > target) {
                  x1 = x;
                  f1 = f;
               }
               else {
                  x2 = x;
                  f2 = f;
               }++rootIterCount;
               ++b2TimeOfImpact.b2_toiRootIters;
               if (rootIterCount == 50) {
                  break;
               }
            }
            b2TimeOfImpact.b2_toiMaxRootIters = b2Math.Max(b2TimeOfImpact.b2_toiMaxRootIters, rootIterCount);
         }
         if (newAlpha < (1.0 + 100.0 * Number.MIN_VALUE) * alpha) {
            break;
         }
         alpha = newAlpha;
         iter++;
         ++b2TimeOfImpact.b2_toiIters;
         if (iter == k_maxIterations) {
            break;
         }
      }
      b2TimeOfImpact.b2_toiMaxIters = b2Math.Max(b2TimeOfImpact.b2_toiMaxIters, iter);
      return alpha;
   }
   Box2D.postDefs.push(function () {
      Box2D.Collision.b2TimeOfImpact.b2_toiCalls = 0;
      Box2D.Collision.b2TimeOfImpact.b2_toiIters = 0;
      Box2D.Collision.b2TimeOfImpact.b2_toiMaxIters = 0;
      Box2D.Collision.b2TimeOfImpact.b2_toiRootIters = 0;
      Box2D.Collision.b2TimeOfImpact.b2_toiMaxRootIters = 0;
      Box2D.Collision.b2TimeOfImpact.s_cache = new b2SimplexCache();
      Box2D.Collision.b2TimeOfImpact.s_distanceInput = new b2DistanceInput();
      Box2D.Collision.b2TimeOfImpact.s_xfA = new b2Transform();
      Box2D.Collision.b2TimeOfImpact.s_xfB = new b2Transform();
      Box2D.Collision.b2TimeOfImpact.s_fcn = new b2SeparationFunction();
      Box2D.Collision.b2TimeOfImpact.s_distanceOutput = new b2DistanceOutput();
   });
   b2TOIInput.b2TOIInput = function () {
      this.proxyA = new b2DistanceProxy();
      this.proxyB = new b2DistanceProxy();
      this.sweepA = new b2Sweep();
      this.sweepB = new b2Sweep();
   };
   b2WorldManifold.b2WorldManifold = function () {
      this.m_normal = new b2Vec2();
   };
   b2WorldManifold.prototype.b2WorldManifold = function () {
      this.m_points = new Vector(b2Settings.b2_maxManifoldPoints);
      for (var i = 0; i < b2Settings.b2_maxManifoldPoints; i++) {
         this.m_points[i] = new b2Vec2();
      }
   }
   b2WorldManifold.prototype.Initialize = function (manifold, xfA, radiusA, xfB, radiusB) {
      if (radiusA === undefined) radiusA = 0;
      if (radiusB === undefined) radiusB = 0;
      if (manifold.m_pointCount == 0) {
         return;
      }
      var i = 0;
      var tVec;
      var tMat;
      var normalX = 0;
      var normalY = 0;
      var planePointX = 0;
      var planePointY = 0;
      var clipPointX = 0;
      var clipPointY = 0;
      switch (manifold.m_type) {
      case b2Manifold.e_circles:
         {
            tMat = xfA.R;
            tVec = manifold.m_localPoint;
            var pointAX = xfA.position.x + tMat.col1.x * tVec.x + tMat.col2.x * tVec.y;
            var pointAY = xfA.position.y + tMat.col1.y * tVec.x + tMat.col2.y * tVec.y;
            tMat = xfB.R;
            tVec = manifold.m_points[0].m_localPoint;
            var pointBX = xfB.position.x + tMat.col1.x * tVec.x + tMat.col2.x * tVec.y;
            var pointBY = xfB.position.y + tMat.col1.y * tVec.x + tMat.col2.y * tVec.y;
            var dX = pointBX - pointAX;
            var dY = pointBY - pointAY;
            var d2 = dX * dX + dY * dY;
            if (d2 > Number.MIN_VALUE * Number.MIN_VALUE) {
               var d = Math.sqrt(d2);
               this.m_normal.x = dX / d;
               this.m_normal.y = dY / d;
            }
            else {
               this.m_normal.x = 1;
               this.m_normal.y = 0;
            }
            var cAX = pointAX + radiusA * this.m_normal.x;
            var cAY = pointAY + radiusA * this.m_normal.y;
            var cBX = pointBX - radiusB * this.m_normal.x;
            var cBY = pointBY - radiusB * this.m_normal.y;
            this.m_points[0].x = 0.5 * (cAX + cBX);
            this.m_points[0].y = 0.5 * (cAY + cBY);
         }
         break;
      case b2Manifold.e_faceA:
         {
            tMat = xfA.R;
            tVec = manifold.m_localPlaneNormal;
            normalX = tMat.col1.x * tVec.x + tMat.col2.x * tVec.y;
            normalY = tMat.col1.y * tVec.x + tMat.col2.y * tVec.y;
            tMat = xfA.R;
            tVec = manifold.m_localPoint;
            planePointX = xfA.position.x + tMat.col1.x * tVec.x + tMat.col2.x * tVec.y;
            planePointY = xfA.position.y + tMat.col1.y * tVec.x + tMat.col2.y * tVec.y;
            this.m_normal.x = normalX;
            this.m_normal.y = normalY;
            for (i = 0;
            i < manifold.m_pointCount; i++) {
               tMat = xfB.R;
               tVec = manifold.m_points[i].m_localPoint;
               clipPointX = xfB.position.x + tMat.col1.x * tVec.x + tMat.col2.x * tVec.y;
               clipPointY = xfB.position.y + tMat.col1.y * tVec.x + tMat.col2.y * tVec.y;
               this.m_points[i].x = clipPointX + 0.5 * (radiusA - (clipPointX - planePointX) * normalX - (clipPointY - planePointY) * normalY - radiusB) * normalX;
               this.m_points[i].y = clipPointY + 0.5 * (radiusA - (clipPointX - planePointX) * normalX - (clipPointY - planePointY) * normalY - radiusB) * normalY;
            }
         }
         break;
      case b2Manifold.e_faceB:
         {
            tMat = xfB.R;
            tVec = manifold.m_localPlaneNormal;
            normalX = tMat.col1.x * tVec.x + tMat.col2.x * tVec.y;
            normalY = tMat.col1.y * tVec.x + tMat.col2.y * tVec.y;
            tMat = xfB.R;
            tVec = manifold.m_localPoint;
            planePointX = xfB.position.x + tMat.col1.x * tVec.x + tMat.col2.x * tVec.y;
            planePointY = xfB.position.y + tMat.col1.y * tVec.x + tMat.col2.y * tVec.y;
            this.m_normal.x = (-normalX);
            this.m_normal.y = (-normalY);
            for (i = 0;
            i < manifold.m_pointCount; i++) {
               tMat = xfA.R;
               tVec = manifold.m_points[i].m_localPoint;
               clipPointX = xfA.position.x + tMat.col1.x * tVec.x + tMat.col2.x * tVec.y;
               clipPointY = xfA.position.y + tMat.col1.y * tVec.x + tMat.col2.y * tVec.y;
               this.m_points[i].x = clipPointX + 0.5 * (radiusB - (clipPointX - planePointX) * normalX - (clipPointY - planePointY) * normalY - radiusA) * normalX;
               this.m_points[i].y = clipPointY + 0.5 * (radiusB - (clipPointX - planePointX) * normalX - (clipPointY - planePointY) * normalY - radiusA) * normalY;
            }
         }
         break;
      }
   }
   ClipVertex.ClipVertex = function () {
      this.v = new b2Vec2();
      this.id = new b2ContactID();
   };
   ClipVertex.prototype.Set = function (other) {
      this.v.SetV(other.v);
      this.id.Set(other.id);
   }
   Features.Features = function () {};
   Object.defineProperty(Features.prototype, 'referenceEdge', {
      enumerable: false,
      configurable: true,
      get: function () {
         return this._referenceEdge;
      }
   });
   Object.defineProperty(Features.prototype, 'referenceEdge', {
      enumerable: false,
      configurable: true,
      set: function (value) {
         if (value === undefined) value = 0;
         this._referenceEdge = value;
         this._m_id._key = (this._m_id._key & 0xffffff00) | (this._referenceEdge & 0x000000ff);
      }
   });
   Object.defineProperty(Features.prototype, 'incidentEdge', {
      enumerable: false,
      configurable: true,
      get: function () {
         return this._incidentEdge;
      }
   });
   Object.defineProperty(Features.prototype, 'incidentEdge', {
      enumerable: false,
      configurable: true,
      set: function (value) {
         if (value === undefined) value = 0;
         this._incidentEdge = value;
         this._m_id._key = (this._m_id._key & 0xffff00ff) | ((this._incidentEdge << 8) & 0x0000ff00);
      }
   });
   Object.defineProperty(Features.prototype, 'incidentVertex', {
      enumerable: false,
      configurable: true,
      get: function () {
         return this._incidentVertex;
      }
   });
   Object.defineProperty(Features.prototype, 'incidentVertex', {
      enumerable: false,
      configurable: true,
      set: function (value) {
         if (value === undefined) value = 0;
         this._incidentVertex = value;
         this._m_id._key = (this._m_id._key & 0xff00ffff) | ((this._incidentVertex << 16) & 0x00ff0000);
      }
   });
   Object.defineProperty(Features.prototype, 'flip', {
      enumerable: false,
      configurable: true,
      get: function () {
         return this._flip;
      }
   });
   Object.defineProperty(Features.prototype, 'flip', {
      enumerable: false,
      configurable: true,
      set: function (value) {
         if (value === undefined) value = 0;
         this._flip = value;
         this._m_id._key = (this._m_id._key & 0x00ffffff) | ((this._flip << 24) & 0xff000000);
      }
   });
})();
(function () {
   var b2Color = Box2D.Common.b2Color,
      b2internal = Box2D.Common.b2internal,
      b2Settings = Box2D.Common.b2Settings,
      b2CircleShape = Box2D.Collision.Shapes.b2CircleShape,
      b2EdgeChainDef = Box2D.Collision.Shapes.b2EdgeChainDef,
      b2EdgeShape = Box2D.Collision.Shapes.b2EdgeShape,
      b2MassData = Box2D.Collision.Shapes.b2MassData,
      b2PolygonShape = Box2D.Collision.Shapes.b2PolygonShape,
      b2Shape = Box2D.Collision.Shapes.b2Shape,
      b2Mat22 = Box2D.Common.Math.b2Mat22,
      b2Mat33 = Box2D.Common.Math.b2Mat33,
      b2Math = Box2D.Common.Math.b2Math,
      b2Sweep = Box2D.Common.Math.b2Sweep,
      b2Transform = Box2D.Common.Math.b2Transform,
      b2Vec2 = Box2D.Common.Math.b2Vec2,
      b2Vec3 = Box2D.Common.Math.b2Vec3,
      b2Body = Box2D.Dynamics.b2Body,
      b2BodyDef = Box2D.Dynamics.b2BodyDef,
      b2ContactFilter = Box2D.Dynamics.b2ContactFilter,
      b2ContactImpulse = Box2D.Dynamics.b2ContactImpulse,
      b2ContactListener = Box2D.Dynamics.b2ContactListener,
      b2ContactManager = Box2D.Dynamics.b2ContactManager,
      b2DebugDraw = Box2D.Dynamics.b2DebugDraw,
      b2DestructionListener = Box2D.Dynamics.b2DestructionListener,
      b2FilterData = Box2D.Dynamics.b2FilterData,
      b2Fixture = Box2D.Dynamics.b2Fixture,
      b2FixtureDef = Box2D.Dynamics.b2FixtureDef,
      b2Island = Box2D.Dynamics.b2Island,
      b2TimeStep = Box2D.Dynamics.b2TimeStep,
      b2World = Box2D.Dynamics.b2World,
      b2AABB = Box2D.Collision.b2AABB,
      b2Bound = Box2D.Collision.b2Bound,
      b2BoundValues = Box2D.Collision.b2BoundValues,
      b2Collision = Box2D.Collision.b2Collision,
      b2ContactID = Box2D.Collision.b2ContactID,
      b2ContactPoint = Box2D.Collision.b2ContactPoint,
      b2Distance = Box2D.Collision.b2Distance,
      b2DistanceInput = Box2D.Collision.b2DistanceInput,
      b2DistanceOutput = Box2D.Collision.b2DistanceOutput,
      b2DistanceProxy = Box2D.Collision.b2DistanceProxy,
      b2DynamicTree = Box2D.Collision.b2DynamicTree,
      b2DynamicTreeBroadPhase = Box2D.Collision.b2DynamicTreeBroadPhase,
      b2DynamicTreeNode = Box2D.Collision.b2DynamicTreeNode,
      b2DynamicTreePair = Box2D.Collision.b2DynamicTreePair,
      b2Manifold = Box2D.Collision.b2Manifold,
      b2ManifoldPoint = Box2D.Collision.b2ManifoldPoint,
      b2Point = Box2D.Collision.b2Point,
      b2RayCastInput = Box2D.Collision.b2RayCastInput,
      b2RayCastOutput = Box2D.Collision.b2RayCastOutput,
      b2Segment = Box2D.Collision.b2Segment,
      b2SeparationFunction = Box2D.Collision.b2SeparationFunction,
      b2Simplex = Box2D.Collision.b2Simplex,
      b2SimplexCache = Box2D.Collision.b2SimplexCache,
      b2SimplexVertex = Box2D.Collision.b2SimplexVertex,
      b2TimeOfImpact = Box2D.Collision.b2TimeOfImpact,
      b2TOIInput = Box2D.Collision.b2TOIInput,
      b2WorldManifold = Box2D.Collision.b2WorldManifold,
      ClipVertex = Box2D.Collision.ClipVertex,
      Features = Box2D.Collision.Features,
      IBroadPhase = Box2D.Collision.IBroadPhase;

   Box2D.inherit(b2CircleShape, Box2D.Collision.Shapes.b2Shape);
   b2CircleShape.prototype.__super = Box2D.Collision.Shapes.b2Shape.prototype;
   b2CircleShape.b2CircleShape = function () {
      Box2D.Collision.Shapes.b2Shape.b2Shape.apply(this, arguments);
      this.m_p = new b2Vec2();
   };
   b2CircleShape.prototype.Copy = function () {
      var s = new b2CircleShape();
      s.Set(this);
      return s;
   }
   b2CircleShape.prototype.Set = function (other) {
      this.__super.Set.call(this, other);
      if (Box2D.is(other, b2CircleShape)) {
         var other2 = (other instanceof b2CircleShape ? other : null);
         this.m_p.SetV(other2.m_p);
      }
   }
   b2CircleShape.prototype.TestPoint = function (transform, p) {
      var tMat = transform.R;
      var dX = transform.position.x + (tMat.col1.x * this.m_p.x + tMat.col2.x * this.m_p.y);
      var dY = transform.position.y + (tMat.col1.y * this.m_p.x + tMat.col2.y * this.m_p.y);
      dX = p.x - dX;
      dY = p.y - dY;
      return (dX * dX + dY * dY) <= this.m_radius * this.m_radius;
   }
   b2CircleShape.prototype.RayCast = function (output, input, transform) {
      var tMat = transform.R;
      var positionX = transform.position.x + (tMat.col1.x * this.m_p.x + tMat.col2.x * this.m_p.y);
      var positionY = transform.position.y + (tMat.col1.y * this.m_p.x + tMat.col2.y * this.m_p.y);
      var sX = input.p1.x - positionX;
      var sY = input.p1.y - positionY;
      var b = (sX * sX + sY * sY) - this.m_radius * this.m_radius;
      var rX = input.p2.x - input.p1.x;
      var rY = input.p2.y - input.p1.y;
      var c = (sX * rX + sY * rY);
      var rr = (rX * rX + rY * rY);
      var sigma = c * c - rr * b;
      if (sigma < 0.0 || rr < Number.MIN_VALUE) {
         return false;
      }
      var a = (-(c + Math.sqrt(sigma)));
      if (0.0 <= a && a <= input.maxFraction * rr) {
         a /= rr;
         output.fraction = a;
         output.normal.x = sX + a * rX;
         output.normal.y = sY + a * rY;
         output.normal.Normalize();
         return true;
      }
      return false;
   }
   b2CircleShape.prototype.ComputeAABB = function (aabb, transform) {
      var tMat = transform.R;
      var pX = transform.position.x + (tMat.col1.x * this.m_p.x + tMat.col2.x * this.m_p.y);
      var pY = transform.position.y + (tMat.col1.y * this.m_p.x + tMat.col2.y * this.m_p.y);
      aabb.lowerBound.Set(pX - this.m_radius, pY - this.m_radius);
      aabb.upperBound.Set(pX + this.m_radius, pY + this.m_radius);
   }
   b2CircleShape.prototype.ComputeMass = function (massData, density) {
      if (density === undefined) density = 0;
      massData.mass = density * b2Settings.b2_pi * this.m_radius * this.m_radius;
      massData.center.SetV(this.m_p);
      massData.I = massData.mass * (0.5 * this.m_radius * this.m_radius + (this.m_p.x * this.m_p.x + this.m_p.y * this.m_p.y));
   }
   b2CircleShape.prototype.ComputeSubmergedArea = function (normal, offset, xf, c) {
      if (offset === undefined) offset = 0;
      var p = b2Math.MulX(xf, this.m_p);
      var l = (-(b2Math.Dot(normal, p) - offset));
      if (l < (-this.m_radius) + Number.MIN_VALUE) {
         return 0;
      }
      if (l > this.m_radius) {
         c.SetV(p);
         return Math.PI * this.m_radius * this.m_radius;
      }
      var r2 = this.m_radius * this.m_radius;
      var l2 = l * l;
      var area = r2 * (Math.asin(l / this.m_radius) + Math.PI / 2) + l * Math.sqrt(r2 - l2);
      var com = (-2 / 3 * Math.pow(r2 - l2, 1.5) / area);
      c.x = p.x + normal.x * com;
      c.y = p.y + normal.y * com;
      return area;
   }
   b2CircleShape.prototype.GetLocalPosition = function () {
      return this.m_p;
   }
   b2CircleShape.prototype.SetLocalPosition = function (position) {
      this.m_p.SetV(position);
   }
   b2CircleShape.prototype.GetRadius = function () {
      return this.m_radius;
   }
   b2CircleShape.prototype.SetRadius = function (radius) {
      if (radius === undefined) radius = 0;
      this.m_radius = radius;
   }
   b2CircleShape.prototype.b2CircleShape = function (radius) {
      if (radius === undefined) radius = 0;
      this.__super.b2Shape.call(this);
      this.m_type = b2Shape.e_circleShape;
      this.m_radius = radius;
   }
   b2EdgeChainDef.b2EdgeChainDef = function () {};
   b2EdgeChainDef.prototype.b2EdgeChainDef = function () {
      this.vertexCount = 0;
      this.isALoop = true;
      this.vertices = [];
   }
   Box2D.inherit(b2EdgeShape, Box2D.Collision.Shapes.b2Shape);
   b2EdgeShape.prototype.__super = Box2D.Collision.Shapes.b2Shape.prototype;
   b2EdgeShape.b2EdgeShape = function () {
      Box2D.Collision.Shapes.b2Shape.b2Shape.apply(this, arguments);
      this.s_supportVec = new b2Vec2();
      this.m_v1 = new b2Vec2();
      this.m_v2 = new b2Vec2();
      this.m_coreV1 = new b2Vec2();
      this.m_coreV2 = new b2Vec2();
      this.m_normal = new b2Vec2();
      this.m_direction = new b2Vec2();
      this.m_cornerDir1 = new b2Vec2();
      this.m_cornerDir2 = new b2Vec2();
   };
   b2EdgeShape.prototype.TestPoint = function (transform, p) {
      return false;
   }
   b2EdgeShape.prototype.RayCast = function (output, input, transform) {
      var tMat;
      var rX = input.p2.x - input.p1.x;
      var rY = input.p2.y - input.p1.y;
      tMat = transform.R;
      var v1X = transform.position.x + (tMat.col1.x * this.m_v1.x + tMat.col2.x * this.m_v1.y);
      var v1Y = transform.position.y + (tMat.col1.y * this.m_v1.x + tMat.col2.y * this.m_v1.y);
      var nX = transform.position.y + (tMat.col1.y * this.m_v2.x + tMat.col2.y * this.m_v2.y) - v1Y;
      var nY = (-(transform.position.x + (tMat.col1.x * this.m_v2.x + tMat.col2.x * this.m_v2.y) - v1X));
      var k_slop = 100.0 * Number.MIN_VALUE;
      var denom = (-(rX * nX + rY * nY));
      if (denom > k_slop) {
         var bX = input.p1.x - v1X;
         var bY = input.p1.y - v1Y;
         var a = (bX * nX + bY * nY);
         if (0.0 <= a && a <= input.maxFraction * denom) {
            var mu2 = (-rX * bY) + rY * bX;
            if ((-k_slop * denom) <= mu2 && mu2 <= denom * (1.0 + k_slop)) {
               a /= denom;
               output.fraction = a;
               var nLen = Math.sqrt(nX * nX + nY * nY);
               output.normal.x = nX / nLen;
               output.normal.y = nY / nLen;
               return true;
            }
         }
      }
      return false;
   }
   b2EdgeShape.prototype.ComputeAABB = function (aabb, transform) {
      var tMat = transform.R;
      var v1X = transform.position.x + (tMat.col1.x * this.m_v1.x + tMat.col2.x * this.m_v1.y);
      var v1Y = transform.position.y + (tMat.col1.y * this.m_v1.x + tMat.col2.y * this.m_v1.y);
      var v2X = transform.position.x + (tMat.col1.x * this.m_v2.x + tMat.col2.x * this.m_v2.y);
      var v2Y = transform.position.y + (tMat.col1.y * this.m_v2.x + tMat.col2.y * this.m_v2.y);
      if (v1X < v2X) {
         aabb.lowerBound.x = v1X;
         aabb.upperBound.x = v2X;
      }
      else {
         aabb.lowerBound.x = v2X;
         aabb.upperBound.x = v1X;
      }
      if (v1Y < v2Y) {
         aabb.lowerBound.y = v1Y;
         aabb.upperBound.y = v2Y;
      }
      else {
         aabb.lowerBound.y = v2Y;
         aabb.upperBound.y = v1Y;
      }
   }
   b2EdgeShape.prototype.ComputeMass = function (massData, density) {
      if (density === undefined) density = 0;
      massData.mass = 0;
      massData.center.SetV(this.m_v1);
      massData.I = 0;
   }
   b2EdgeShape.prototype.ComputeSubmergedArea = function (normal, offset, xf, c) {
      if (offset === undefined) offset = 0;
      var v0 = new b2Vec2(normal.x * offset, normal.y * offset);
      var v1 = b2Math.MulX(xf, this.m_v1);
      var v2 = b2Math.MulX(xf, this.m_v2);
      var d1 = b2Math.Dot(normal, v1) - offset;
      var d2 = b2Math.Dot(normal, v2) - offset;
      if (d1 > 0) {
         if (d2 > 0) {
            return 0;
         }
         else {
            v1.x = (-d2 / (d1 - d2) * v1.x) + d1 / (d1 - d2) * v2.x;
            v1.y = (-d2 / (d1 - d2) * v1.y) + d1 / (d1 - d2) * v2.y;
         }
      }
      else {
         if (d2 > 0) {
            v2.x = (-d2 / (d1 - d2) * v1.x) + d1 / (d1 - d2) * v2.x;
            v2.y = (-d2 / (d1 - d2) * v1.y) + d1 / (d1 - d2) * v2.y;
         }
         else {}
      }
      c.x = (v0.x + v1.x + v2.x) / 3;
      c.y = (v0.y + v1.y + v2.y) / 3;
      return 0.5 * ((v1.x - v0.x) * (v2.y - v0.y) - (v1.y - v0.y) * (v2.x - v0.x));
   }
   b2EdgeShape.prototype.GetLength = function () {
      return this.m_length;
   }
   b2EdgeShape.prototype.GetVertex1 = function () {
      return this.m_v1;
   }
   b2EdgeShape.prototype.GetVertex2 = function () {
      return this.m_v2;
   }
   b2EdgeShape.prototype.GetCoreVertex1 = function () {
      return this.m_coreV1;
   }
   b2EdgeShape.prototype.GetCoreVertex2 = function () {
      return this.m_coreV2;
   }
   b2EdgeShape.prototype.GetNormalVector = function () {
      return this.m_normal;
   }
   b2EdgeShape.prototype.GetDirectionVector = function () {
      return this.m_direction;
   }
   b2EdgeShape.prototype.GetCorner1Vector = function () {
      return this.m_cornerDir1;
   }
   b2EdgeShape.prototype.GetCorner2Vector = function () {
      return this.m_cornerDir2;
   }
   b2EdgeShape.prototype.Corner1IsConvex = function () {
      return this.m_cornerConvex1;
   }
   b2EdgeShape.prototype.Corner2IsConvex = function () {
      return this.m_cornerConvex2;
   }
   b2EdgeShape.prototype.GetFirstVertex = function (xf) {
      var tMat = xf.R;
      return new b2Vec2(xf.position.x + (tMat.col1.x * this.m_coreV1.x + tMat.col2.x * this.m_coreV1.y), xf.position.y + (tMat.col1.y * this.m_coreV1.x + tMat.col2.y * this.m_coreV1.y));
   }
   b2EdgeShape.prototype.GetNextEdge = function () {
      return this.m_nextEdge;
   }
   b2EdgeShape.prototype.GetPrevEdge = function () {
      return this.m_prevEdge;
   }
   b2EdgeShape.prototype.Support = function (xf, dX, dY) {
      if (dX === undefined) dX = 0;
      if (dY === undefined) dY = 0;
      var tMat = xf.R;
      var v1X = xf.position.x + (tMat.col1.x * this.m_coreV1.x + tMat.col2.x * this.m_coreV1.y);
      var v1Y = xf.position.y + (tMat.col1.y * this.m_coreV1.x + tMat.col2.y * this.m_coreV1.y);
      var v2X = xf.position.x + (tMat.col1.x * this.m_coreV2.x + tMat.col2.x * this.m_coreV2.y);
      var v2Y = xf.position.y + (tMat.col1.y * this.m_coreV2.x + tMat.col2.y * this.m_coreV2.y);
      if ((v1X * dX + v1Y * dY) > (v2X * dX + v2Y * dY)) {
         this.s_supportVec.x = v1X;
         this.s_supportVec.y = v1Y;
      }
      else {
         this.s_supportVec.x = v2X;
         this.s_supportVec.y = v2Y;
      }
      return this.s_supportVec;
   }
   b2EdgeShape.prototype.b2EdgeShape = function (v1, v2) {
      this.__super.b2Shape.call(this);
      this.m_type = b2Shape.e_edgeShape;
      this.m_prevEdge = null;
      this.m_nextEdge = null;
      this.m_v1 = v1;
      this.m_v2 = v2;
      this.m_direction.Set(this.m_v2.x - this.m_v1.x, this.m_v2.y - this.m_v1.y);
      this.m_length = this.m_direction.Normalize();
      this.m_normal.Set(this.m_direction.y, (-this.m_direction.x));
      this.m_coreV1.Set((-b2Settings.b2_toiSlop * (this.m_normal.x - this.m_direction.x)) + this.m_v1.x, (-b2Settings.b2_toiSlop * (this.m_normal.y - this.m_direction.y)) + this.m_v1.y);
      this.m_coreV2.Set((-b2Settings.b2_toiSlop * (this.m_normal.x + this.m_direction.x)) + this.m_v2.x, (-b2Settings.b2_toiSlop * (this.m_normal.y + this.m_direction.y)) + this.m_v2.y);
      this.m_cornerDir1 = this.m_normal;
      this.m_cornerDir2.Set((-this.m_normal.x), (-this.m_normal.y));
   }
   b2EdgeShape.prototype.SetPrevEdge = function (edge, core, cornerDir, convex) {
      this.m_prevEdge = edge;
      this.m_coreV1 = core;
      this.m_cornerDir1 = cornerDir;
      this.m_cornerConvex1 = convex;
   }
   b2EdgeShape.prototype.SetNextEdge = function (edge, core, cornerDir, convex) {
      this.m_nextEdge = edge;
      this.m_coreV2 = core;
      this.m_cornerDir2 = cornerDir;
      this.m_cornerConvex2 = convex;
   }
   b2MassData.b2MassData = function () {
      this.mass = 0.0;
      this.center = new b2Vec2(0, 0);
      this.I = 0.0;
   };
   Box2D.inherit(b2PolygonShape, Box2D.Collision.Shapes.b2Shape);
   b2PolygonShape.prototype.__super = Box2D.Collision.Shapes.b2Shape.prototype;
   b2PolygonShape.b2PolygonShape = function () {
      Box2D.Collision.Shapes.b2Shape.b2Shape.apply(this, arguments);
   };
   b2PolygonShape.prototype.Copy = function () {
      var s = new b2PolygonShape();
      s.Set(this);
      return s;
   }
   b2PolygonShape.prototype.Set = function (other) {
      this.__super.Set.call(this, other);
      if (Box2D.is(other, b2PolygonShape)) {
         var other2 = (other instanceof b2PolygonShape ? other : null);
         this.m_centroid.SetV(other2.m_centroid);
         this.m_vertexCount = other2.m_vertexCount;
         this.Reserve(this.m_vertexCount);
         for (var i = 0; i < this.m_vertexCount; i++) {
            this.m_vertices[i].SetV(other2.m_vertices[i]);
            this.m_normals[i].SetV(other2.m_normals[i]);
         }
      }
   }
   b2PolygonShape.prototype.SetAsArray = function (vertices, vertexCount) {
      if (vertexCount === undefined) vertexCount = 0;
      var v = new Vector();
      var i = 0,
         tVec;
      for (i = 0;
      i < vertices.length; ++i) {
         tVec = vertices[i];
         v.push(tVec);
      }
      this.SetAsVector(v, vertexCount);
   }
   b2PolygonShape.AsArray = function (vertices, vertexCount) {
      if (vertexCount === undefined) vertexCount = 0;
      var polygonShape = new b2PolygonShape();
      polygonShape.SetAsArray(vertices, vertexCount);
      return polygonShape;
   }
   b2PolygonShape.prototype.SetAsVector = function (vertices, vertexCount) {
      if (vertexCount === undefined) vertexCount = 0;
      if (vertexCount == 0) vertexCount = vertices.length;
      b2Settings.b2Assert(2 <= vertexCount);
      this.m_vertexCount = vertexCount;
      this.Reserve(vertexCount);
      var i = 0;
      for (i = 0;
      i < this.m_vertexCount; i++) {
         this.m_vertices[i].SetV(vertices[i]);
      }
      for (i = 0;
      i < this.m_vertexCount; ++i) {
         var i1 = parseInt(i);
         var i2 = parseInt(i + 1 < this.m_vertexCount ? i + 1 : 0);
         var edge = b2Math.SubtractVV(this.m_vertices[i2], this.m_vertices[i1]);
         b2Settings.b2Assert(edge.LengthSquared() > Number.MIN_VALUE);
         this.m_normals[i].SetV(b2Math.CrossVF(edge, 1.0));
         this.m_normals[i].Normalize();
      }
      this.m_centroid = b2PolygonShape.ComputeCentroid(this.m_vertices, this.m_vertexCount);
   }
   b2PolygonShape.AsVector = function (vertices, vertexCount) {
      if (vertexCount === undefined) vertexCount = 0;
      var polygonShape = new b2PolygonShape();
      polygonShape.SetAsVector(vertices, vertexCount);
      return polygonShape;
   }
   b2PolygonShape.prototype.SetAsBox = function (hx, hy) {
      if (hx === undefined) hx = 0;
      if (hy === undefined) hy = 0;
      this.m_vertexCount = 4;
      this.Reserve(4);
      this.m_vertices[0].Set((-hx), (-hy));
      this.m_vertices[1].Set(hx, (-hy));
      this.m_vertices[2].Set(hx, hy);
      this.m_vertices[3].Set((-hx), hy);
      this.m_normals[0].Set(0.0, (-1.0));
      this.m_normals[1].Set(1.0, 0.0);
      this.m_normals[2].Set(0.0, 1.0);
      this.m_normals[3].Set((-1.0), 0.0);
      this.m_centroid.SetZero();
   }
   b2PolygonShape.AsBox = function (hx, hy) {
      if (hx === undefined) hx = 0;
      if (hy === undefined) hy = 0;
      var polygonShape = new b2PolygonShape();
      polygonShape.SetAsBox(hx, hy);
      return polygonShape;
   }
   b2PolygonShape.prototype.SetAsOrientedBox = function (hx, hy, center, angle) {
      if (hx === undefined) hx = 0;
      if (hy === undefined) hy = 0;
      if (center === undefined) center = null;
      if (angle === undefined) angle = 0.0;
      this.m_vertexCount = 4;
      this.Reserve(4);
      this.m_vertices[0].Set((-hx), (-hy));
      this.m_vertices[1].Set(hx, (-hy));
      this.m_vertices[2].Set(hx, hy);
      this.m_vertices[3].Set((-hx), hy);
      this.m_normals[0].Set(0.0, (-1.0));
      this.m_normals[1].Set(1.0, 0.0);
      this.m_normals[2].Set(0.0, 1.0);
      this.m_normals[3].Set((-1.0), 0.0);
      this.m_centroid = center;
      var xf = new b2Transform();
      xf.position = center;
      xf.R.Set(angle);
      for (var i = 0; i < this.m_vertexCount; ++i) {
         this.m_vertices[i] = b2Math.MulX(xf, this.m_vertices[i]);
         this.m_normals[i] = b2Math.MulMV(xf.R, this.m_normals[i]);
      }
   }
   b2PolygonShape.AsOrientedBox = function (hx, hy, center, angle) {
      if (hx === undefined) hx = 0;
      if (hy === undefined) hy = 0;
      if (center === undefined) center = null;
      if (angle === undefined) angle = 0.0;
      var polygonShape = new b2PolygonShape();
      polygonShape.SetAsOrientedBox(hx, hy, center, angle);
      return polygonShape;
   }
   b2PolygonShape.prototype.SetAsEdge = function (v1, v2) {
      this.m_vertexCount = 2;
      this.Reserve(2);
      this.m_vertices[0].SetV(v1);
      this.m_vertices[1].SetV(v2);
      this.m_centroid.x = 0.5 * (v1.x + v2.x);
      this.m_centroid.y = 0.5 * (v1.y + v2.y);
      this.m_normals[0] = b2Math.CrossVF(b2Math.SubtractVV(v2, v1), 1.0);
      this.m_normals[0].Normalize();
      this.m_normals[1].x = (-this.m_normals[0].x);
      this.m_normals[1].y = (-this.m_normals[0].y);
   }
   b2PolygonShape.AsEdge = function (v1, v2) {
      var polygonShape = new b2PolygonShape();
      polygonShape.SetAsEdge(v1, v2);
      return polygonShape;
   }
   b2PolygonShape.prototype.TestPoint = function (xf, p) {
      var tVec;
      var tMat = xf.R;
      var tX = p.x - xf.position.x;
      var tY = p.y - xf.position.y;
      var pLocalX = (tX * tMat.col1.x + tY * tMat.col1.y);
      var pLocalY = (tX * tMat.col2.x + tY * tMat.col2.y);
      for (var i = 0; i < this.m_vertexCount; ++i) {
         tVec = this.m_vertices[i];
         tX = pLocalX - tVec.x;
         tY = pLocalY - tVec.y;
         tVec = this.m_normals[i];
         var dot = (tVec.x * tX + tVec.y * tY);
         if (dot > 0.0) {
            return false;
         }
      }
      return true;
   }
   b2PolygonShape.prototype.RayCast = function (output, input, transform) {
      var lower = 0.0;
      var upper = input.maxFraction;
      var tX = 0;
      var tY = 0;
      var tMat;
      var tVec;
      tX = input.p1.x - transform.position.x;
      tY = input.p1.y - transform.position.y;
      tMat = transform.R;
      var p1X = (tX * tMat.col1.x + tY * tMat.col1.y);
      var p1Y = (tX * tMat.col2.x + tY * tMat.col2.y);
      tX = input.p2.x - transform.position.x;
      tY = input.p2.y - transform.position.y;
      tMat = transform.R;
      var p2X = (tX * tMat.col1.x + tY * tMat.col1.y);
      var p2Y = (tX * tMat.col2.x + tY * tMat.col2.y);
      var dX = p2X - p1X;
      var dY = p2Y - p1Y;
      var index = parseInt((-1));
      for (var i = 0; i < this.m_vertexCount; ++i) {
         tVec = this.m_vertices[i];
         tX = tVec.x - p1X;
         tY = tVec.y - p1Y;
         tVec = this.m_normals[i];
         var numerator = (tVec.x * tX + tVec.y * tY);
         var denominator = (tVec.x * dX + tVec.y * dY);
         if (denominator == 0.0) {
            if (numerator < 0.0) {
               return false;
            }
         }
         else {
            if (denominator < 0.0 && numerator < lower * denominator) {
               lower = numerator / denominator;
               index = i;
            }
            else if (denominator > 0.0 && numerator < upper * denominator) {
               upper = numerator / denominator;
            }
         }
         if (upper < lower - Number.MIN_VALUE) {
            return false;
         }
      }
      if (index >= 0) {
         output.fraction = lower;
         tMat = transform.R;
         tVec = this.m_normals[index];
         output.normal.x = (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
         output.normal.y = (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
         return true;
      }
      return false;
   }
   b2PolygonShape.prototype.ComputeAABB = function (aabb, xf) {
      var tMat = xf.R;
      var tVec = this.m_vertices[0];
      var lowerX = xf.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
      var lowerY = xf.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
      var upperX = lowerX;
      var upperY = lowerY;
      for (var i = 1; i < this.m_vertexCount; ++i) {
         tVec = this.m_vertices[i];
         var vX = xf.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
         var vY = xf.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
         lowerX = lowerX < vX ? lowerX : vX;
         lowerY = lowerY < vY ? lowerY : vY;
         upperX = upperX > vX ? upperX : vX;
         upperY = upperY > vY ? upperY : vY;
      }
      aabb.lowerBound.x = lowerX - this.m_radius;
      aabb.lowerBound.y = lowerY - this.m_radius;
      aabb.upperBound.x = upperX + this.m_radius;
      aabb.upperBound.y = upperY + this.m_radius;
   }
   b2PolygonShape.prototype.ComputeMass = function (massData, density) {
      if (density === undefined) density = 0;
      if (this.m_vertexCount == 2) {
         massData.center.x = 0.5 * (this.m_vertices[0].x + this.m_vertices[1].x);
         massData.center.y = 0.5 * (this.m_vertices[0].y + this.m_vertices[1].y);
         massData.mass = 0.0;
         massData.I = 0.0;
         return;
      }
      var centerX = 0.0;
      var centerY = 0.0;
      var area = 0.0;
      var I = 0.0;
      var p1X = 0.0;
      var p1Y = 0.0;
      var k_inv3 = 1.0 / 3.0;
      for (var i = 0; i < this.m_vertexCount; ++i) {
         var p2 = this.m_vertices[i];
         var p3 = i + 1 < this.m_vertexCount ? this.m_vertices[parseInt(i + 1)] : this.m_vertices[0];
         var e1X = p2.x - p1X;
         var e1Y = p2.y - p1Y;
         var e2X = p3.x - p1X;
         var e2Y = p3.y - p1Y;
         var D = e1X * e2Y - e1Y * e2X;
         var triangleArea = 0.5 * D;area += triangleArea;
         centerX += triangleArea * k_inv3 * (p1X + p2.x + p3.x);
         centerY += triangleArea * k_inv3 * (p1Y + p2.y + p3.y);
         var px = p1X;
         var py = p1Y;
         var ex1 = e1X;
         var ey1 = e1Y;
         var ex2 = e2X;
         var ey2 = e2Y;
         var intx2 = k_inv3 * (0.25 * (ex1 * ex1 + ex2 * ex1 + ex2 * ex2) + (px * ex1 + px * ex2)) + 0.5 * px * px;
         var inty2 = k_inv3 * (0.25 * (ey1 * ey1 + ey2 * ey1 + ey2 * ey2) + (py * ey1 + py * ey2)) + 0.5 * py * py;I += D * (intx2 + inty2);
      }
      massData.mass = density * area;
      centerX *= 1.0 / area;
      centerY *= 1.0 / area;
      massData.center.Set(centerX, centerY);
      massData.I = density * I;
   }
   b2PolygonShape.prototype.ComputeSubmergedArea = function (normal, offset, xf, c) {
      if (offset === undefined) offset = 0;
      var normalL = b2Math.MulTMV(xf.R, normal);
      var offsetL = offset - b2Math.Dot(normal, xf.position);
      var depths = new Vector_a2j_Number();
      var diveCount = 0;
      var intoIndex = parseInt((-1));
      var outoIndex = parseInt((-1));
      var lastSubmerged = false;
      var i = 0;
      for (i = 0;
      i < this.m_vertexCount; ++i) {
         depths[i] = b2Math.Dot(normalL, this.m_vertices[i]) - offsetL;
         var isSubmerged = depths[i] < (-Number.MIN_VALUE);
         if (i > 0) {
            if (isSubmerged) {
               if (!lastSubmerged) {
                  intoIndex = i - 1;
                  diveCount++;
               }
            }
            else {
               if (lastSubmerged) {
                  outoIndex = i - 1;
                  diveCount++;
               }
            }
         }
         lastSubmerged = isSubmerged;
      }
      switch (diveCount) {
      case 0:
         if (lastSubmerged) {
            var md = new b2MassData();
            this.ComputeMass(md, 1);
            c.SetV(b2Math.MulX(xf, md.center));
            return md.mass;
         }
         else {
            return 0;
         }
         break;
      case 1:
         if (intoIndex == (-1)) {
            intoIndex = this.m_vertexCount - 1;
         }
         else {
            outoIndex = this.m_vertexCount - 1;
         }
         break;
      }
      var intoIndex2 = parseInt((intoIndex + 1) % this.m_vertexCount);
      var outoIndex2 = parseInt((outoIndex + 1) % this.m_vertexCount);
      var intoLamdda = (0 - depths[intoIndex]) / (depths[intoIndex2] - depths[intoIndex]);
      var outoLamdda = (0 - depths[outoIndex]) / (depths[outoIndex2] - depths[outoIndex]);
      var intoVec = new b2Vec2(this.m_vertices[intoIndex].x * (1 - intoLamdda) + this.m_vertices[intoIndex2].x * intoLamdda, this.m_vertices[intoIndex].y * (1 - intoLamdda) + this.m_vertices[intoIndex2].y * intoLamdda);
      var outoVec = new b2Vec2(this.m_vertices[outoIndex].x * (1 - outoLamdda) + this.m_vertices[outoIndex2].x * outoLamdda, this.m_vertices[outoIndex].y * (1 - outoLamdda) + this.m_vertices[outoIndex2].y * outoLamdda);
      var area = 0;
      var center = new b2Vec2();
      var p2 = this.m_vertices[intoIndex2];
      var p3;
      i = intoIndex2;
      while (i != outoIndex2) {
         i = (i + 1) % this.m_vertexCount;
         if (i == outoIndex2) p3 = outoVec;
         else p3 = this.m_vertices[i];
         var triangleArea = 0.5 * ((p2.x - intoVec.x) * (p3.y - intoVec.y) - (p2.y - intoVec.y) * (p3.x - intoVec.x));
         area += triangleArea;
         center.x += triangleArea * (intoVec.x + p2.x + p3.x) / 3;
         center.y += triangleArea * (intoVec.y + p2.y + p3.y) / 3;
         p2 = p3;
      }
      center.Multiply(1 / area);
      c.SetV(b2Math.MulX(xf, center));
      return area;
   }
   b2PolygonShape.prototype.GetVertexCount = function () {
      return this.m_vertexCount;
   }
   b2PolygonShape.prototype.GetVertices = function () {
      return this.m_vertices;
   }
   b2PolygonShape.prototype.GetNormals = function () {
      return this.m_normals;
   }
   b2PolygonShape.prototype.GetSupport = function (d) {
      var bestIndex = 0;
      var bestValue = this.m_vertices[0].x * d.x + this.m_vertices[0].y * d.y;
      for (var i = 1; i < this.m_vertexCount; ++i) {
         var value = this.m_vertices[i].x * d.x + this.m_vertices[i].y * d.y;
         if (value > bestValue) {
            bestIndex = i;
            bestValue = value;
         }
      }
      return bestIndex;
   }
   b2PolygonShape.prototype.GetSupportVertex = function (d) {
      var bestIndex = 0;
      var bestValue = this.m_vertices[0].x * d.x + this.m_vertices[0].y * d.y;
      for (var i = 1; i < this.m_vertexCount; ++i) {
         var value = this.m_vertices[i].x * d.x + this.m_vertices[i].y * d.y;
         if (value > bestValue) {
            bestIndex = i;
            bestValue = value;
         }
      }
      return this.m_vertices[bestIndex];
   }
   b2PolygonShape.prototype.Validate = function () {
      return false;
   }
   b2PolygonShape.prototype.b2PolygonShape = function () {
      this.__super.b2Shape.call(this);
      this.m_type = b2Shape.e_polygonShape;
      this.m_centroid = new b2Vec2();
      this.m_vertices = new Vector();
      this.m_normals = new Vector();
   }
   b2PolygonShape.prototype.Reserve = function (count) {
      if (count === undefined) count = 0;
      for (var i = parseInt(this.m_vertices.length); i < count; i++) {
         this.m_vertices[i] = new b2Vec2();
         this.m_normals[i] = new b2Vec2();
      }
   }
   b2PolygonShape.ComputeCentroid = function (vs, count) {
      if (count === undefined) count = 0;
      var c = new b2Vec2();
      var area = 0.0;
      var p1X = 0.0;
      var p1Y = 0.0;
      var inv3 = 1.0 / 3.0;
      for (var i = 0; i < count; ++i) {
         var p2 = vs[i];
         var p3 = i + 1 < count ? vs[parseInt(i + 1)] : vs[0];
         var e1X = p2.x - p1X;
         var e1Y = p2.y - p1Y;
         var e2X = p3.x - p1X;
         var e2Y = p3.y - p1Y;
         var D = (e1X * e2Y - e1Y * e2X);
         var triangleArea = 0.5 * D;area += triangleArea;
         c.x += triangleArea * inv3 * (p1X + p2.x + p3.x);
         c.y += triangleArea * inv3 * (p1Y + p2.y + p3.y);
      }
      c.x *= 1.0 / area;
      c.y *= 1.0 / area;
      return c;
   }
   b2PolygonShape.ComputeOBB = function (obb, vs, count) {
      if (count === undefined) count = 0;
      var i = 0;
      var p = new Vector(count + 1);
      for (i = 0;
      i < count; ++i) {
         p[i] = vs[i];
      }
      p[count] = p[0];
      var minArea = Number.MAX_VALUE;
      for (i = 1;
      i <= count; ++i) {
         var root = p[parseInt(i - 1)];
         var uxX = p[i].x - root.x;
         var uxY = p[i].y - root.y;
         var length = Math.sqrt(uxX * uxX + uxY * uxY);
         uxX /= length;
         uxY /= length;
         var uyX = (-uxY);
         var uyY = uxX;
         var lowerX = Number.MAX_VALUE;
         var lowerY = Number.MAX_VALUE;
         var upperX = (-Number.MAX_VALUE);
         var upperY = (-Number.MAX_VALUE);
         for (var j = 0; j < count; ++j) {
            var dX = p[j].x - root.x;
            var dY = p[j].y - root.y;
            var rX = (uxX * dX + uxY * dY);
            var rY = (uyX * dX + uyY * dY);
            if (rX < lowerX) lowerX = rX;
            if (rY < lowerY) lowerY = rY;
            if (rX > upperX) upperX = rX;
            if (rY > upperY) upperY = rY;
         }
         var area = (upperX - lowerX) * (upperY - lowerY);
         if (area < 0.95 * minArea) {
            minArea = area;
            obb.R.col1.x = uxX;
            obb.R.col1.y = uxY;
            obb.R.col2.x = uyX;
            obb.R.col2.y = uyY;
            var centerX = 0.5 * (lowerX + upperX);
            var centerY = 0.5 * (lowerY + upperY);
            var tMat = obb.R;
            obb.center.x = root.x + (tMat.col1.x * centerX + tMat.col2.x * centerY);
            obb.center.y = root.y + (tMat.col1.y * centerX + tMat.col2.y * centerY);
            obb.extents.x = 0.5 * (upperX - lowerX);
            obb.extents.y = 0.5 * (upperY - lowerY);
         }
      }
   }
   Box2D.postDefs.push(function () {
      Box2D.Collision.Shapes.b2PolygonShape.s_mat = new b2Mat22();
   });
   b2Shape.b2Shape = function () {};
   b2Shape.prototype.Copy = function () {
      return null;
   }
   b2Shape.prototype.Set = function (other) {
      this.m_radius = other.m_radius;
   }
   b2Shape.prototype.GetType = function () {
      return this.m_type;
   }
   b2Shape.prototype.TestPoint = function (xf, p) {
      return false;
   }
   b2Shape.prototype.RayCast = function (output, input, transform) {
      return false;
   }
   b2Shape.prototype.ComputeAABB = function (aabb, xf) {}
   b2Shape.prototype.ComputeMass = function (massData, density) {
      if (density === undefined) density = 0;
   }
   b2Shape.prototype.ComputeSubmergedArea = function (normal, offset, xf, c) {
      if (offset === undefined) offset = 0;
      return 0;
   }
   b2Shape.TestOverlap = function (shape1, transform1, shape2, transform2) {
      var input = new b2DistanceInput();
      input.proxyA = new b2DistanceProxy();
      input.proxyA.Set(shape1);
      input.proxyB = new b2DistanceProxy();
      input.proxyB.Set(shape2);
      input.transformA = transform1;
      input.transformB = transform2;
      input.useRadii = true;
      var simplexCache = new b2SimplexCache();
      simplexCache.count = 0;
      var output = new b2DistanceOutput();
      b2Distance.Distance(output, simplexCache, input);
      return output.distance < 10.0 * Number.MIN_VALUE;
   }
   b2Shape.prototype.b2Shape = function () {
      this.m_type = b2Shape.e_unknownShape;
      this.m_radius = b2Settings.b2_linearSlop;
   }
   Box2D.postDefs.push(function () {
      Box2D.Collision.Shapes.b2Shape.e_unknownShape = parseInt((-1));
      Box2D.Collision.Shapes.b2Shape.e_circleShape = 0;
      Box2D.Collision.Shapes.b2Shape.e_polygonShape = 1;
      Box2D.Collision.Shapes.b2Shape.e_edgeShape = 2;
      Box2D.Collision.Shapes.b2Shape.e_shapeTypeCount = 3;
      Box2D.Collision.Shapes.b2Shape.e_hitCollide = 1;
      Box2D.Collision.Shapes.b2Shape.e_missCollide = 0;
      Box2D.Collision.Shapes.b2Shape.e_startsInsideCollide = parseInt((-1));
   });
})();
(function () {
   var b2Color = Box2D.Common.b2Color,
      b2internal = Box2D.Common.b2internal,
      b2Settings = Box2D.Common.b2Settings,
      b2Mat22 = Box2D.Common.Math.b2Mat22,
      b2Mat33 = Box2D.Common.Math.b2Mat33,
      b2Math = Box2D.Common.Math.b2Math,
      b2Sweep = Box2D.Common.Math.b2Sweep,
      b2Transform = Box2D.Common.Math.b2Transform,
      b2Vec2 = Box2D.Common.Math.b2Vec2,
      b2Vec3 = Box2D.Common.Math.b2Vec3;

   b2Color.b2Color = function () {
      this._r = 0;
      this._g = 0;
      this._b = 0;
   };
   b2Color.prototype.b2Color = function (rr, gg, bb) {
      if (rr === undefined) rr = 0;
      if (gg === undefined) gg = 0;
      if (bb === undefined) bb = 0;
      this._r = Box2D.parseUInt(255 * b2Math.Clamp(rr, 0.0, 1.0));
      this._g = Box2D.parseUInt(255 * b2Math.Clamp(gg, 0.0, 1.0));
      this._b = Box2D.parseUInt(255 * b2Math.Clamp(bb, 0.0, 1.0));
   }
   b2Color.prototype.Set = function (rr, gg, bb) {
      if (rr === undefined) rr = 0;
      if (gg === undefined) gg = 0;
      if (bb === undefined) bb = 0;
      this._r = Box2D.parseUInt(255 * b2Math.Clamp(rr, 0.0, 1.0));
      this._g = Box2D.parseUInt(255 * b2Math.Clamp(gg, 0.0, 1.0));
      this._b = Box2D.parseUInt(255 * b2Math.Clamp(bb, 0.0, 1.0));
   }
   Object.defineProperty(b2Color.prototype, 'r', {
      enumerable: false,
      configurable: true,
      set: function (rr) {
         if (rr === undefined) rr = 0;
         this._r = Box2D.parseUInt(255 * b2Math.Clamp(rr, 0.0, 1.0));
      }
   });
   Object.defineProperty(b2Color.prototype, 'g', {
      enumerable: false,
      configurable: true,
      set: function (gg) {
         if (gg === undefined) gg = 0;
         this._g = Box2D.parseUInt(255 * b2Math.Clamp(gg, 0.0, 1.0));
      }
   });
   Object.defineProperty(b2Color.prototype, 'b', {
      enumerable: false,
      configurable: true,
      set: function (bb) {
         if (bb === undefined) bb = 0;
         this._b = Box2D.parseUInt(255 * b2Math.Clamp(bb, 0.0, 1.0));
      }
   });
   Object.defineProperty(b2Color.prototype, 'color', {
      enumerable: false,
      configurable: true,
      get: function () {
         return (this._r << 16) | (this._g << 8) | (this._b);
      }
   });
   b2Settings.b2Settings = function () {};
   b2Settings.b2MixFriction = function (friction1, friction2) {
      if (friction1 === undefined) friction1 = 0;
      if (friction2 === undefined) friction2 = 0;
      return Math.sqrt(friction1 * friction2);
   }
   b2Settings.b2MixRestitution = function (restitution1, restitution2) {
      if (restitution1 === undefined) restitution1 = 0;
      if (restitution2 === undefined) restitution2 = 0;
      return restitution1 > restitution2 ? restitution1 : restitution2;
   }
   b2Settings.b2Assert = function (a) {
      if (!a) {
         throw "Assertion Failed";
      }
   }
   Box2D.postDefs.push(function () {
      Box2D.Common.b2Settings.VERSION = "2.1alpha";
      Box2D.Common.b2Settings.USHRT_MAX = 0x0000ffff;
      Box2D.Common.b2Settings.b2_pi = Math.PI;
      Box2D.Common.b2Settings.b2_maxManifoldPoints = 2;
      Box2D.Common.b2Settings.b2_aabbExtension = 0.1;
      Box2D.Common.b2Settings.b2_aabbMultiplier = 2.0;
      Box2D.Common.b2Settings.b2_polygonRadius = 2.0 * b2Settings.b2_linearSlop;
      Box2D.Common.b2Settings.b2_linearSlop = 0.005;
      Box2D.Common.b2Settings.b2_angularSlop = 2.0 / 180.0 * b2Settings.b2_pi;
      Box2D.Common.b2Settings.b2_toiSlop = 8.0 * b2Settings.b2_linearSlop;
      Box2D.Common.b2Settings.b2_maxTOIContactsPerIsland = 32;
      Box2D.Common.b2Settings.b2_maxTOIJointsPerIsland = 32;
      Box2D.Common.b2Settings.b2_velocityThreshold = 1.0;
      Box2D.Common.b2Settings.b2_maxLinearCorrection = 0.2;
      Box2D.Common.b2Settings.b2_maxAngularCorrection = 8.0 / 180.0 * b2Settings.b2_pi;
      Box2D.Common.b2Settings.b2_maxTranslation = 2.0;
      Box2D.Common.b2Settings.b2_maxTranslationSquared = b2Settings.b2_maxTranslation * b2Settings.b2_maxTranslation;
      Box2D.Common.b2Settings.b2_maxRotation = 0.5 * b2Settings.b2_pi;
      Box2D.Common.b2Settings.b2_maxRotationSquared = b2Settings.b2_maxRotation * b2Settings.b2_maxRotation;
      Box2D.Common.b2Settings.b2_contactBaumgarte = 0.2;
      Box2D.Common.b2Settings.b2_timeToSleep = 0.5;
      Box2D.Common.b2Settings.b2_linearSleepTolerance = 0.01;
      Box2D.Common.b2Settings.b2_angularSleepTolerance = 2.0 / 180.0 * b2Settings.b2_pi;
   });
})();
(function () {
   var b2AABB = Box2D.Collision.b2AABB,
      b2Color = Box2D.Common.b2Color,
      b2internal = Box2D.Common.b2internal,
      b2Settings = Box2D.Common.b2Settings,
      b2Mat22 = Box2D.Common.Math.b2Mat22,
      b2Mat33 = Box2D.Common.Math.b2Mat33,
      b2Math = Box2D.Common.Math.b2Math,
      b2Sweep = Box2D.Common.Math.b2Sweep,
      b2Transform = Box2D.Common.Math.b2Transform,
      b2Vec2 = Box2D.Common.Math.b2Vec2,
      b2Vec3 = Box2D.Common.Math.b2Vec3;

   b2Mat22.b2Mat22 = function () {
      this.col1 = new b2Vec2();
      this.col2 = new b2Vec2();
   };
   b2Mat22.prototype.b2Mat22 = function () {
      this.SetIdentity();
   }
   b2Mat22.FromAngle = function (angle) {
      if (angle === undefined) angle = 0;
      var mat = new b2Mat22();
      mat.Set(angle);
      return mat;
   }
   b2Mat22.FromVV = function (c1, c2) {
      var mat = new b2Mat22();
      mat.SetVV(c1, c2);
      return mat;
   }
   b2Mat22.prototype.Set = function (angle) {
      if (angle === undefined) angle = 0;
      var c = Math.cos(angle);
      var s = Math.sin(angle);
      this.col1.x = c;
      this.col2.x = (-s);
      this.col1.y = s;
      this.col2.y = c;
   }
   b2Mat22.prototype.SetVV = function (c1, c2) {
      this.col1.SetV(c1);
      this.col2.SetV(c2);
   }
   b2Mat22.prototype.Copy = function () {
      var mat = new b2Mat22();
      mat.SetM(this);
      return mat;
   }
   b2Mat22.prototype.SetM = function (m) {
      this.col1.SetV(m.col1);
      this.col2.SetV(m.col2);
   }
   b2Mat22.prototype.AddM = function (m) {
      this.col1.x += m.col1.x;
      this.col1.y += m.col1.y;
      this.col2.x += m.col2.x;
      this.col2.y += m.col2.y;
   }
   b2Mat22.prototype.SetIdentity = function () {
      this.col1.x = 1.0;
      this.col2.x = 0.0;
      this.col1.y = 0.0;
      this.col2.y = 1.0;
   }
   b2Mat22.prototype.SetZero = function () {
      this.col1.x = 0.0;
      this.col2.x = 0.0;
      this.col1.y = 0.0;
      this.col2.y = 0.0;
   }
   b2Mat22.prototype.GetAngle = function () {
      return Math.atan2(this.col1.y, this.col1.x);
   }
   b2Mat22.prototype.GetInverse = function (out) {
      var a = this.col1.x;
      var b = this.col2.x;
      var c = this.col1.y;
      var d = this.col2.y;
      var det = a * d - b * c;
      if (det != 0.0) {
         det = 1.0 / det;
      }
      out.col1.x = det * d;
      out.col2.x = (-det * b);
      out.col1.y = (-det * c);
      out.col2.y = det * a;
      return out;
   }
   b2Mat22.prototype.Solve = function (out, bX, bY) {
      if (bX === undefined) bX = 0;
      if (bY === undefined) bY = 0;
      var a11 = this.col1.x;
      var a12 = this.col2.x;
      var a21 = this.col1.y;
      var a22 = this.col2.y;
      var det = a11 * a22 - a12 * a21;
      if (det != 0.0) {
         det = 1.0 / det;
      }
      out.x = det * (a22 * bX - a12 * bY);
      out.y = det * (a11 * bY - a21 * bX);
      return out;
   }
   b2Mat22.prototype.Abs = function () {
      this.col1.Abs();
      this.col2.Abs();
   }
   b2Mat33.b2Mat33 = function () {
      this.col1 = new b2Vec3();
      this.col2 = new b2Vec3();
      this.col3 = new b2Vec3();
   };
   b2Mat33.prototype.b2Mat33 = function (c1, c2, c3) {
      if (c1 === undefined) c1 = null;
      if (c2 === undefined) c2 = null;
      if (c3 === undefined) c3 = null;
      if (!c1 && !c2 && !c3) {
         this.col1.SetZero();
         this.col2.SetZero();
         this.col3.SetZero();
      }
      else {
         this.col1.SetV(c1);
         this.col2.SetV(c2);
         this.col3.SetV(c3);
      }
   }
   b2Mat33.prototype.SetVVV = function (c1, c2, c3) {
      this.col1.SetV(c1);
      this.col2.SetV(c2);
      this.col3.SetV(c3);
   }
   b2Mat33.prototype.Copy = function () {
      return new b2Mat33(this.col1, this.col2, this.col3);
   }
   b2Mat33.prototype.SetM = function (m) {
      this.col1.SetV(m.col1);
      this.col2.SetV(m.col2);
      this.col3.SetV(m.col3);
   }
   b2Mat33.prototype.AddM = function (m) {
      this.col1.x += m.col1.x;
      this.col1.y += m.col1.y;
      this.col1.z += m.col1.z;
      this.col2.x += m.col2.x;
      this.col2.y += m.col2.y;
      this.col2.z += m.col2.z;
      this.col3.x += m.col3.x;
      this.col3.y += m.col3.y;
      this.col3.z += m.col3.z;
   }
   b2Mat33.prototype.SetIdentity = function () {
      this.col1.x = 1.0;
      this.col2.x = 0.0;
      this.col3.x = 0.0;
      this.col1.y = 0.0;
      this.col2.y = 1.0;
      this.col3.y = 0.0;
      this.col1.z = 0.0;
      this.col2.z = 0.0;
      this.col3.z = 1.0;
   }
   b2Mat33.prototype.SetZero = function () {
      this.col1.x = 0.0;
      this.col2.x = 0.0;
      this.col3.x = 0.0;
      this.col1.y = 0.0;
      this.col2.y = 0.0;
      this.col3.y = 0.0;
      this.col1.z = 0.0;
      this.col2.z = 0.0;
      this.col3.z = 0.0;
   }
   b2Mat33.prototype.Solve22 = function (out, bX, bY) {
      if (bX === undefined) bX = 0;
      if (bY === undefined) bY = 0;
      var a11 = this.col1.x;
      var a12 = this.col2.x;
      var a21 = this.col1.y;
      var a22 = this.col2.y;
      var det = a11 * a22 - a12 * a21;
      if (det != 0.0) {
         det = 1.0 / det;
      }
      out.x = det * (a22 * bX - a12 * bY);
      out.y = det * (a11 * bY - a21 * bX);
      return out;
   }
   b2Mat33.prototype.Solve33 = function (out, bX, bY, bZ) {
      if (bX === undefined) bX = 0;
      if (bY === undefined) bY = 0;
      if (bZ === undefined) bZ = 0;
      var a11 = this.col1.x;
      var a21 = this.col1.y;
      var a31 = this.col1.z;
      var a12 = this.col2.x;
      var a22 = this.col2.y;
      var a32 = this.col2.z;
      var a13 = this.col3.x;
      var a23 = this.col3.y;
      var a33 = this.col3.z;
      var det = a11 * (a22 * a33 - a32 * a23) + a21 * (a32 * a13 - a12 * a33) + a31 * (a12 * a23 - a22 * a13);
      if (det != 0.0) {
         det = 1.0 / det;
      }
      out.x = det * (bX * (a22 * a33 - a32 * a23) + bY * (a32 * a13 - a12 * a33) + bZ * (a12 * a23 - a22 * a13));
      out.y = det * (a11 * (bY * a33 - bZ * a23) + a21 * (bZ * a13 - bX * a33) + a31 * (bX * a23 - bY * a13));
      out.z = det * (a11 * (a22 * bZ - a32 * bY) + a21 * (a32 * bX - a12 * bZ) + a31 * (a12 * bY - a22 * bX));
      return out;
   }
   b2Math.b2Math = function () {};
   b2Math.IsValid = function (x) {
      if (x === undefined) x = 0;
      return isFinite(x);
   }
   b2Math.Dot = function (a, b) {
      return a.x * b.x + a.y * b.y;
   }
   b2Math.CrossVV = function (a, b) {
      return a.x * b.y - a.y * b.x;
   }
   b2Math.CrossVF = function (a, s) {
      if (s === undefined) s = 0;
      var v = new b2Vec2(s * a.y, (-s * a.x));
      return v;
   }
   b2Math.CrossFV = function (s, a) {
      if (s === undefined) s = 0;
      var v = new b2Vec2((-s * a.y), s * a.x);
      return v;
   }
   b2Math.MulMV = function (A, v) {
      var u = new b2Vec2(A.col1.x * v.x + A.col2.x * v.y, A.col1.y * v.x + A.col2.y * v.y);
      return u;
   }
   b2Math.MulTMV = function (A, v) {
      var u = new b2Vec2(b2Math.Dot(v, A.col1), b2Math.Dot(v, A.col2));
      return u;
   }
   b2Math.MulX = function (T, v) {
      var a = b2Math.MulMV(T.R, v);
      a.x += T.position.x;
      a.y += T.position.y;
      return a;
   }
   b2Math.MulXT = function (T, v) {
      var a = b2Math.SubtractVV(v, T.position);
      var tX = (a.x * T.R.col1.x + a.y * T.R.col1.y);
      a.y = (a.x * T.R.col2.x + a.y * T.R.col2.y);
      a.x = tX;
      return a;
   }
   b2Math.AddVV = function (a, b) {
      var v = new b2Vec2(a.x + b.x, a.y + b.y);
      return v;
   }
   b2Math.SubtractVV = function (a, b) {
      var v = new b2Vec2(a.x - b.x, a.y - b.y);
      return v;
   }
   b2Math.Distance = function (a, b) {
      var cX = a.x - b.x;
      var cY = a.y - b.y;
      return Math.sqrt(cX * cX + cY * cY);
   }
   b2Math.DistanceSquared = function (a, b) {
      var cX = a.x - b.x;
      var cY = a.y - b.y;
      return (cX * cX + cY * cY);
   }
   b2Math.MulFV = function (s, a) {
      if (s === undefined) s = 0;
      var v = new b2Vec2(s * a.x, s * a.y);
      return v;
   }
   b2Math.AddMM = function (A, B) {
      var C = b2Mat22.FromVV(b2Math.AddVV(A.col1, B.col1), b2Math.AddVV(A.col2, B.col2));
      return C;
   }
   b2Math.MulMM = function (A, B) {
      var C = b2Mat22.FromVV(b2Math.MulMV(A, B.col1), b2Math.MulMV(A, B.col2));
      return C;
   }
   b2Math.MulTMM = function (A, B) {
      var c1 = new b2Vec2(b2Math.Dot(A.col1, B.col1), b2Math.Dot(A.col2, B.col1));
      var c2 = new b2Vec2(b2Math.Dot(A.col1, B.col2), b2Math.Dot(A.col2, B.col2));
      var C = b2Mat22.FromVV(c1, c2);
      return C;
   }
   b2Math.Abs = function (a) {
      if (a === undefined) a = 0;
      return a > 0.0 ? a : (-a);
   }
   b2Math.AbsV = function (a) {
      var b = new b2Vec2(b2Math.Abs(a.x), b2Math.Abs(a.y));
      return b;
   }
   b2Math.AbsM = function (A) {
      var B = b2Mat22.FromVV(b2Math.AbsV(A.col1), b2Math.AbsV(A.col2));
      return B;
   }
   b2Math.Min = function (a, b) {
      if (a === undefined) a = 0;
      if (b === undefined) b = 0;
      return a < b ? a : b;
   }
   b2Math.MinV = function (a, b) {
      var c = new b2Vec2(b2Math.Min(a.x, b.x), b2Math.Min(a.y, b.y));
      return c;
   }
   b2Math.Max = function (a, b) {
      if (a === undefined) a = 0;
      if (b === undefined) b = 0;
      return a > b ? a : b;
   }
   b2Math.MaxV = function (a, b) {
      var c = new b2Vec2(b2Math.Max(a.x, b.x), b2Math.Max(a.y, b.y));
      return c;
   }
   b2Math.Clamp = function (a, low, high) {
      if (a === undefined) a = 0;
      if (low === undefined) low = 0;
      if (high === undefined) high = 0;
      return a < low ? low : a > high ? high : a;
   }
   b2Math.ClampV = function (a, low, high) {
      return b2Math.MaxV(low, b2Math.MinV(a, high));
   }
   b2Math.Swap = function (a, b) {
      var tmp = a[0];
      a[0] = b[0];
      b[0] = tmp;
   }
   b2Math.Random = function () {
      return Math.random() * 2 - 1;
   }
   b2Math.RandomRange = function (lo, hi) {
      if (lo === undefined) lo = 0;
      if (hi === undefined) hi = 0;
      var r = Math.random();
      r = (hi - lo) * r + lo;
      return r;
   }
   b2Math.NextPowerOfTwo = function (x) {
      if (x === undefined) x = 0;
      x |= (x >> 1) & 0x7FFFFFFF;
      x |= (x >> 2) & 0x3FFFFFFF;
      x |= (x >> 4) & 0x0FFFFFFF;
      x |= (x >> 8) & 0x00FFFFFF;
      x |= (x >> 16) & 0x0000FFFF;
      return x + 1;
   }
   b2Math.IsPowerOfTwo = function (x) {
      if (x === undefined) x = 0;
      var result = x > 0 && (x & (x - 1)) == 0;
      return result;
   }
   Box2D.postDefs.push(function () {
      Box2D.Common.Math.b2Math.b2Vec2_zero = new b2Vec2(0.0, 0.0);
      Box2D.Common.Math.b2Math.b2Mat22_identity = b2Mat22.FromVV(new b2Vec2(1.0, 0.0), new b2Vec2(0.0, 1.0));
      Box2D.Common.Math.b2Math.b2Transform_identity = new b2Transform(b2Math.b2Vec2_zero, b2Math.b2Mat22_identity);
   });
   b2Sweep.b2Sweep = function () {
      this.localCenter = new b2Vec2();
      this.c0 = new b2Vec2;
      this.c = new b2Vec2();
   };
   b2Sweep.prototype.Set = function (other) {
      this.localCenter.SetV(other.localCenter);
      this.c0.SetV(other.c0);
      this.c.SetV(other.c);
      this.a0 = other.a0;
      this.a = other.a;
      this.t0 = other.t0;
   }
   b2Sweep.prototype.Copy = function () {
      var copy = new b2Sweep();
      copy.localCenter.SetV(this.localCenter);
      copy.c0.SetV(this.c0);
      copy.c.SetV(this.c);
      copy.a0 = this.a0;
      copy.a = this.a;
      copy.t0 = this.t0;
      return copy;
   }
   b2Sweep.prototype.GetTransform = function (xf, alpha) {
      if (alpha === undefined) alpha = 0;
      xf.position.x = (1.0 - alpha) * this.c0.x + alpha * this.c.x;
      xf.position.y = (1.0 - alpha) * this.c0.y + alpha * this.c.y;
      var angle = (1.0 - alpha) * this.a0 + alpha * this.a;
      xf.R.Set(angle);
      var tMat = xf.R;
      xf.position.x -= (tMat.col1.x * this.localCenter.x + tMat.col2.x * this.localCenter.y);
      xf.position.y -= (tMat.col1.y * this.localCenter.x + tMat.col2.y * this.localCenter.y);
   }
   b2Sweep.prototype.Advance = function (t) {
      if (t === undefined) t = 0;
      if (this.t0 < t && 1.0 - this.t0 > Number.MIN_VALUE) {
         var alpha = (t - this.t0) / (1.0 - this.t0);
         this.c0.x = (1.0 - alpha) * this.c0.x + alpha * this.c.x;
         this.c0.y = (1.0 - alpha) * this.c0.y + alpha * this.c.y;
         this.a0 = (1.0 - alpha) * this.a0 + alpha * this.a;
         this.t0 = t;
      }
   }
   b2Transform.b2Transform = function () {
      this.position = new b2Vec2;
      this.R = new b2Mat22();
   };
   b2Transform.prototype.b2Transform = function (pos, r) {
      if (pos === undefined) pos = null;
      if (r === undefined) r = null;
      if (pos) {
         this.position.SetV(pos);
         this.R.SetM(r);
      }
   }
   b2Transform.prototype.Initialize = function (pos, r) {
      this.position.SetV(pos);
      this.R.SetM(r);
   }
   b2Transform.prototype.SetIdentity = function () {
      this.position.SetZero();
      this.R.SetIdentity();
   }
   b2Transform.prototype.Set = function (x) {
      this.position.SetV(x.position);
      this.R.SetM(x.R);
   }
   b2Transform.prototype.GetAngle = function () {
      return Math.atan2(this.R.col1.y, this.R.col1.x);
   }
   b2Vec2.b2Vec2 = function () {};
   b2Vec2.prototype.b2Vec2 = function (x_, y_) {
      if (x_ === undefined) x_ = 0;
      if (y_ === undefined) y_ = 0;
      this.x = x_;
      this.y = y_;
   }
   b2Vec2.prototype.SetZero = function () {
      this.x = 0.0;
      this.y = 0.0;
   }
   b2Vec2.prototype.Set = function (x_, y_) {
      if (x_ === undefined) x_ = 0;
      if (y_ === undefined) y_ = 0;
      this.x = x_;
      this.y = y_;
   }
   b2Vec2.prototype.SetV = function (v) {
      this.x = v.x;
      this.y = v.y;
   }
   b2Vec2.prototype.GetNegative = function () {
      return new b2Vec2((-this.x), (-this.y));
   }
   b2Vec2.prototype.NegativeSelf = function () {
      this.x = (-this.x);
      this.y = (-this.y);
   }
   b2Vec2.Make = function (x_, y_) {
      if (x_ === undefined) x_ = 0;
      if (y_ === undefined) y_ = 0;
      return new b2Vec2(x_, y_);
   }
   b2Vec2.prototype.Copy = function () {
      return new b2Vec2(this.x, this.y);
   }
   b2Vec2.prototype.Add = function (v) {
      this.x += v.x;
      this.y += v.y;
   }
   b2Vec2.prototype.Subtract = function (v) {
      this.x -= v.x;
      this.y -= v.y;
   }
   b2Vec2.prototype.Multiply = function (a) {
      if (a === undefined) a = 0;
      this.x *= a;
      this.y *= a;
   }
   b2Vec2.prototype.MulM = function (A) {
      var tX = this.x;
      this.x = A.col1.x * tX + A.col2.x * this.y;
      this.y = A.col1.y * tX + A.col2.y * this.y;
   }
   b2Vec2.prototype.MulTM = function (A) {
      var tX = b2Math.Dot(this, A.col1);
      this.y = b2Math.Dot(this, A.col2);
      this.x = tX;
   }
   b2Vec2.prototype.CrossVF = function (s) {
      if (s === undefined) s = 0;
      var tX = this.x;
      this.x = s * this.y;
      this.y = (-s * tX);
   }
   b2Vec2.prototype.CrossFV = function (s) {
      if (s === undefined) s = 0;
      var tX = this.x;
      this.x = (-s * this.y);
      this.y = s * tX;
   }
   b2Vec2.prototype.MinV = function (b) {
      this.x = this.x < b.x ? this.x : b.x;
      this.y = this.y < b.y ? this.y : b.y;
   }
   b2Vec2.prototype.MaxV = function (b) {
      this.x = this.x > b.x ? this.x : b.x;
      this.y = this.y > b.y ? this.y : b.y;
   }
   b2Vec2.prototype.Abs = function () {
      if (this.x < 0) this.x = (-this.x);
      if (this.y < 0) this.y = (-this.y);
   }
   b2Vec2.prototype.Length = function () {
      return Math.sqrt(this.x * this.x + this.y * this.y);
   }
   b2Vec2.prototype.LengthSquared = function () {
      return (this.x * this.x + this.y * this.y);
   }
   b2Vec2.prototype.Normalize = function () {
      var length = Math.sqrt(this.x * this.x + this.y * this.y);
      if (length < Number.MIN_VALUE) {
         return 0.0;
      }
      var invLength = 1.0 / length;
      this.x *= invLength;
      this.y *= invLength;
      return length;
   }
   b2Vec2.prototype.IsValid = function () {
      return b2Math.IsValid(this.x) && b2Math.IsValid(this.y);
   }
   b2Vec3.b2Vec3 = function () {};
   b2Vec3.prototype.b2Vec3 = function (x, y, z) {
      if (x === undefined) x = 0;
      if (y === undefined) y = 0;
      if (z === undefined) z = 0;
      this.x = x;
      this.y = y;
      this.z = z;
   }
   b2Vec3.prototype.SetZero = function () {
      this.x = this.y = this.z = 0.0;
   }
   b2Vec3.prototype.Set = function (x, y, z) {
      if (x === undefined) x = 0;
      if (y === undefined) y = 0;
      if (z === undefined) z = 0;
      this.x = x;
      this.y = y;
      this.z = z;
   }
   b2Vec3.prototype.SetV = function (v) {
      this.x = v.x;
      this.y = v.y;
      this.z = v.z;
   }
   b2Vec3.prototype.GetNegative = function () {
      return new b2Vec3((-this.x), (-this.y), (-this.z));
   }
   b2Vec3.prototype.NegativeSelf = function () {
      this.x = (-this.x);
      this.y = (-this.y);
      this.z = (-this.z);
   }
   b2Vec3.prototype.Copy = function () {
      return new b2Vec3(this.x, this.y, this.z);
   }
   b2Vec3.prototype.Add = function (v) {
      this.x += v.x;
      this.y += v.y;
      this.z += v.z;
   }
   b2Vec3.prototype.Subtract = function (v) {
      this.x -= v.x;
      this.y -= v.y;
      this.z -= v.z;
   }
   b2Vec3.prototype.Multiply = function (a) {
      if (a === undefined) a = 0;
      this.x *= a;
      this.y *= a;
      this.z *= a;
   }
})();
(function () {
   var b2ControllerEdge = Box2D.Dynamics.Controllers.b2ControllerEdge,
      b2Mat22 = Box2D.Common.Math.b2Mat22,
      b2Mat33 = Box2D.Common.Math.b2Mat33,
      b2Math = Box2D.Common.Math.b2Math,
      b2Sweep = Box2D.Common.Math.b2Sweep,
      b2Transform = Box2D.Common.Math.b2Transform,
      b2Vec2 = Box2D.Common.Math.b2Vec2,
      b2Vec3 = Box2D.Common.Math.b2Vec3,
      b2Color = Box2D.Common.b2Color,
      b2internal = Box2D.Common.b2internal,
      b2Settings = Box2D.Common.b2Settings,
      b2AABB = Box2D.Collision.b2AABB,
      b2Bound = Box2D.Collision.b2Bound,
      b2BoundValues = Box2D.Collision.b2BoundValues,
      b2Collision = Box2D.Collision.b2Collision,
      b2ContactID = Box2D.Collision.b2ContactID,
      b2ContactPoint = Box2D.Collision.b2ContactPoint,
      b2Distance = Box2D.Collision.b2Distance,
      b2DistanceInput = Box2D.Collision.b2DistanceInput,
      b2DistanceOutput = Box2D.Collision.b2DistanceOutput,
      b2DistanceProxy = Box2D.Collision.b2DistanceProxy,
      b2DynamicTree = Box2D.Collision.b2DynamicTree,
      b2DynamicTreeBroadPhase = Box2D.Collision.b2DynamicTreeBroadPhase,
      b2DynamicTreeNode = Box2D.Collision.b2DynamicTreeNode,
      b2DynamicTreePair = Box2D.Collision.b2DynamicTreePair,
      b2Manifold = Box2D.Collision.b2Manifold,
      b2ManifoldPoint = Box2D.Collision.b2ManifoldPoint,
      b2Point = Box2D.Collision.b2Point,
      b2RayCastInput = Box2D.Collision.b2RayCastInput,
      b2RayCastOutput = Box2D.Collision.b2RayCastOutput,
      b2Segment = Box2D.Collision.b2Segment,
      b2SeparationFunction = Box2D.Collision.b2SeparationFunction,
      b2Simplex = Box2D.Collision.b2Simplex,
      b2SimplexCache = Box2D.Collision.b2SimplexCache,
      b2SimplexVertex = Box2D.Collision.b2SimplexVertex,
      b2TimeOfImpact = Box2D.Collision.b2TimeOfImpact,
      b2TOIInput = Box2D.Collision.b2TOIInput,
      b2WorldManifold = Box2D.Collision.b2WorldManifold,
      ClipVertex = Box2D.Collision.ClipVertex,
      Features = Box2D.Collision.Features,
      IBroadPhase = Box2D.Collision.IBroadPhase,
      b2CircleShape = Box2D.Collision.Shapes.b2CircleShape,
      b2EdgeChainDef = Box2D.Collision.Shapes.b2EdgeChainDef,
      b2EdgeShape = Box2D.Collision.Shapes.b2EdgeShape,
      b2MassData = Box2D.Collision.Shapes.b2MassData,
      b2PolygonShape = Box2D.Collision.Shapes.b2PolygonShape,
      b2Shape = Box2D.Collision.Shapes.b2Shape,
      b2Body = Box2D.Dynamics.b2Body,
      b2BodyDef = Box2D.Dynamics.b2BodyDef,
      b2ContactFilter = Box2D.Dynamics.b2ContactFilter,
      b2ContactImpulse = Box2D.Dynamics.b2ContactImpulse,
      b2ContactListener = Box2D.Dynamics.b2ContactListener,
      b2ContactManager = Box2D.Dynamics.b2ContactManager,
      b2DebugDraw = Box2D.Dynamics.b2DebugDraw,
      b2DestructionListener = Box2D.Dynamics.b2DestructionListener,
      b2FilterData = Box2D.Dynamics.b2FilterData,
      b2Fixture = Box2D.Dynamics.b2Fixture,
      b2FixtureDef = Box2D.Dynamics.b2FixtureDef,
      b2Island = Box2D.Dynamics.b2Island,
      b2TimeStep = Box2D.Dynamics.b2TimeStep,
      b2World = Box2D.Dynamics.b2World,
      b2CircleContact = Box2D.Dynamics.Contacts.b2CircleContact,
      b2Contact = Box2D.Dynamics.Contacts.b2Contact,
      b2ContactConstraint = Box2D.Dynamics.Contacts.b2ContactConstraint,
      b2ContactConstraintPoint = Box2D.Dynamics.Contacts.b2ContactConstraintPoint,
      b2ContactEdge = Box2D.Dynamics.Contacts.b2ContactEdge,
      b2ContactFactory = Box2D.Dynamics.Contacts.b2ContactFactory,
      b2ContactRegister = Box2D.Dynamics.Contacts.b2ContactRegister,
      b2ContactResult = Box2D.Dynamics.Contacts.b2ContactResult,
      b2ContactSolver = Box2D.Dynamics.Contacts.b2ContactSolver,
      b2EdgeAndCircleContact = Box2D.Dynamics.Contacts.b2EdgeAndCircleContact,
      b2NullContact = Box2D.Dynamics.Contacts.b2NullContact,
      b2PolyAndCircleContact = Box2D.Dynamics.Contacts.b2PolyAndCircleContact,
      b2PolyAndEdgeContact = Box2D.Dynamics.Contacts.b2PolyAndEdgeContact,
      b2PolygonContact = Box2D.Dynamics.Contacts.b2PolygonContact,
      b2PositionSolverManifold = Box2D.Dynamics.Contacts.b2PositionSolverManifold,
      b2Controller = Box2D.Dynamics.Controllers.b2Controller,
      b2DistanceJoint = Box2D.Dynamics.Joints.b2DistanceJoint,
      b2DistanceJointDef = Box2D.Dynamics.Joints.b2DistanceJointDef,
      b2FrictionJoint = Box2D.Dynamics.Joints.b2FrictionJoint,
      b2FrictionJointDef = Box2D.Dynamics.Joints.b2FrictionJointDef,
      b2GearJoint = Box2D.Dynamics.Joints.b2GearJoint,
      b2GearJointDef = Box2D.Dynamics.Joints.b2GearJointDef,
      b2Jacobian = Box2D.Dynamics.Joints.b2Jacobian,
      b2Joint = Box2D.Dynamics.Joints.b2Joint,
      b2JointDef = Box2D.Dynamics.Joints.b2JointDef,
      b2JointEdge = Box2D.Dynamics.Joints.b2JointEdge,
      b2LineJoint = Box2D.Dynamics.Joints.b2LineJoint,
      b2LineJointDef = Box2D.Dynamics.Joints.b2LineJointDef,
      b2MouseJoint = Box2D.Dynamics.Joints.b2MouseJoint,
      b2MouseJointDef = Box2D.Dynamics.Joints.b2MouseJointDef,
      b2PrismaticJoint = Box2D.Dynamics.Joints.b2PrismaticJoint,
      b2PrismaticJointDef = Box2D.Dynamics.Joints.b2PrismaticJointDef,
      b2PulleyJoint = Box2D.Dynamics.Joints.b2PulleyJoint,
      b2PulleyJointDef = Box2D.Dynamics.Joints.b2PulleyJointDef,
      b2RevoluteJoint = Box2D.Dynamics.Joints.b2RevoluteJoint,
      b2RevoluteJointDef = Box2D.Dynamics.Joints.b2RevoluteJointDef,
      b2WeldJoint = Box2D.Dynamics.Joints.b2WeldJoint,
      b2WeldJointDef = Box2D.Dynamics.Joints.b2WeldJointDef;

   b2Body.b2Body = function () {
      this.m_xf = new b2Transform();
      this.m_sweep = new b2Sweep();
      this.m_linearVelocity = new b2Vec2();
      this.m_force = new b2Vec2();
   };
   b2Body.prototype.connectEdges = function (s1, s2, angle1) {
      if (angle1 === undefined) angle1 = 0;
      var angle2 = Math.atan2(s2.GetDirectionVector().y, s2.GetDirectionVector().x);
      var coreOffset = Math.tan((angle2 - angle1) * 0.5);
      var core = b2Math.MulFV(coreOffset, s2.GetDirectionVector());
      core = b2Math.SubtractVV(core, s2.GetNormalVector());
      core = b2Math.MulFV(b2Settings.b2_toiSlop, core);
      core = b2Math.AddVV(core, s2.GetVertex1());
      var cornerDir = b2Math.AddVV(s1.GetDirectionVector(), s2.GetDirectionVector());
      cornerDir.Normalize();
      var convex = b2Math.Dot(s1.GetDirectionVector(), s2.GetNormalVector()) > 0.0;
      s1.SetNextEdge(s2, core, cornerDir, convex);
      s2.SetPrevEdge(s1, core, cornerDir, convex);
      return angle2;
   }
   b2Body.prototype.CreateFixture = function (def) {
      if (this.m_world.IsLocked() == true) {
         return null;
      }
      var fixture = new b2Fixture();
      fixture.Create(this, this.m_xf, def);
      if (this.m_flags & b2Body.e_activeFlag) {
         var broadPhase = this.m_world.m_contactManager.m_broadPhase;
         fixture.CreateProxy(broadPhase, this.m_xf);
      }
      fixture.m_next = this.m_fixtureList;
      this.m_fixtureList = fixture;
      ++this.m_fixtureCount;
      fixture.m_body = this;
      if (fixture.m_density > 0.0) {
         this.ResetMassData();
      }
      this.m_world.m_flags |= b2World.e_newFixture;
      return fixture;
   }
   b2Body.prototype.CreateFixture2 = function (shape, density) {
      if (density === undefined) density = 0.0;
      var def = new b2FixtureDef();
      def.shape = shape;
      def.density = density;
      return this.CreateFixture(def);
   }
   b2Body.prototype.DestroyFixture = function (fixture) {
      if (this.m_world.IsLocked() == true) {
         return;
      }
      var node = this.m_fixtureList;
      var ppF = null;
      var found = false;
      while (node != null) {
         if (node == fixture) {
            if (ppF) ppF.m_next = fixture.m_next;
            else this.m_fixtureList = fixture.m_next;
            found = true;
            break;
         }
         ppF = node;
         node = node.m_next;
      }
      var edge = this.m_contactList;
      while (edge) {
         var c = edge.contact;
         edge = edge.next;
         var fixtureA = c.GetFixtureA();
         var fixtureB = c.GetFixtureB();
         if (fixture == fixtureA || fixture == fixtureB) {
            this.m_world.m_contactManager.Destroy(c);
         }
      }
      if (this.m_flags & b2Body.e_activeFlag) {
         var broadPhase = this.m_world.m_contactManager.m_broadPhase;
         fixture.DestroyProxy(broadPhase);
      }
      else {}
      fixture.Destroy();
      fixture.m_body = null;
      fixture.m_next = null;
      --this.m_fixtureCount;
      this.ResetMassData();
   }
   b2Body.prototype.SetPositionAndAngle = function (position, angle) {
      if (angle === undefined) angle = 0;
      var f;
      if (this.m_world.IsLocked() == true) {
         return;
      }
      this.m_xf.R.Set(angle);
      this.m_xf.position.SetV(position);
      var tMat = this.m_xf.R;
      var tVec = this.m_sweep.localCenter;
      this.m_sweep.c.x = (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
      this.m_sweep.c.y = (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
      this.m_sweep.c.x += this.m_xf.position.x;
      this.m_sweep.c.y += this.m_xf.position.y;
      this.m_sweep.c0.SetV(this.m_sweep.c);
      this.m_sweep.a0 = this.m_sweep.a = angle;
      var broadPhase = this.m_world.m_contactManager.m_broadPhase;
      for (f = this.m_fixtureList;
      f; f = f.m_next) {
         f.Synchronize(broadPhase, this.m_xf, this.m_xf);
      }
      this.m_world.m_contactManager.FindNewContacts();
   }
   b2Body.prototype.SetTransform = function (xf) {
      this.SetPositionAndAngle(xf.position, xf.GetAngle());
   }
   b2Body.prototype.GetTransform = function () {
      return this.m_xf;
   }
   b2Body.prototype.GetPosition = function () {
      return this.m_xf.position;
   }
   b2Body.prototype.SetPosition = function (position) {
      this.SetPositionAndAngle(position, this.GetAngle());
   }
   b2Body.prototype.GetAngle = function () {
      return this.m_sweep.a;
   }
   b2Body.prototype.SetAngle = function (angle) {
      if (angle === undefined) angle = 0;
      this.SetPositionAndAngle(this.GetPosition(), angle);
   }
   b2Body.prototype.GetWorldCenter = function () {
      return this.m_sweep.c;
   }
   b2Body.prototype.GetLocalCenter = function () {
      return this.m_sweep.localCenter;
   }
   b2Body.prototype.SetLinearVelocity = function (v) {
      if (this.m_type == b2Body.b2_staticBody) {
         return;
      }
      this.m_linearVelocity.SetV(v);
   }
   b2Body.prototype.GetLinearVelocity = function () {
      return this.m_linearVelocity;
   }
   b2Body.prototype.SetAngularVelocity = function (omega) {
      if (omega === undefined) omega = 0;
      if (this.m_type == b2Body.b2_staticBody) {
         return;
      }
      this.m_angularVelocity = omega;
   }
   b2Body.prototype.GetAngularVelocity = function () {
      return this.m_angularVelocity;
   }
   b2Body.prototype.GetDefinition = function () {
      var bd = new b2BodyDef();
      bd.type = this.GetType();
      bd.allowSleep = (this.m_flags & b2Body.e_allowSleepFlag) == b2Body.e_allowSleepFlag;
      bd.angle = this.GetAngle();
      bd.angularDamping = this.m_angularDamping;
      bd.angularVelocity = this.m_angularVelocity;
      bd.fixedRotation = (this.m_flags & b2Body.e_fixedRotationFlag) == b2Body.e_fixedRotationFlag;
      bd.bullet = (this.m_flags & b2Body.e_bulletFlag) == b2Body.e_bulletFlag;
      bd.awake = (this.m_flags & b2Body.e_awakeFlag) == b2Body.e_awakeFlag;
      bd.linearDamping = this.m_linearDamping;
      bd.linearVelocity.SetV(this.GetLinearVelocity());
      bd.position = this.GetPosition();
      bd.userData = this.GetUserData();
      return bd;
   }
   b2Body.prototype.ApplyForce = function (force, point) {
      if (this.m_type != b2Body.b2_dynamicBody) {
         return;
      }
      if (this.IsAwake() == false) {
         this.SetAwake(true);
      }
      this.m_force.x += force.x;
      this.m_force.y += force.y;
      this.m_torque += ((point.x - this.m_sweep.c.x) * force.y - (point.y - this.m_sweep.c.y) * force.x);
   }
   b2Body.prototype.ApplyTorque = function (torque) {
      if (torque === undefined) torque = 0;
      if (this.m_type != b2Body.b2_dynamicBody) {
         return;
      }
      if (this.IsAwake() == false) {
         this.SetAwake(true);
      }
      this.m_torque += torque;
   }
   b2Body.prototype.ApplyImpulse = function (impulse, point) {
      if (this.m_type != b2Body.b2_dynamicBody) {
         return;
      }
      if (this.IsAwake() == false) {
         this.SetAwake(true);
      }
      this.m_linearVelocity.x += this.m_invMass * impulse.x;
      this.m_linearVelocity.y += this.m_invMass * impulse.y;
      this.m_angularVelocity += this.m_invI * ((point.x - this.m_sweep.c.x) * impulse.y - (point.y - this.m_sweep.c.y) * impulse.x);
   }
   b2Body.prototype.Split = function (callback) {
      var linearVelocity = this.GetLinearVelocity().Copy();
      var angularVelocity = this.GetAngularVelocity();
      var center = this.GetWorldCenter();
      var body1 = this;
      var body2 = this.m_world.CreateBody(this.GetDefinition());
      var prev;
      for (var f = body1.m_fixtureList; f;) {
         if (callback(f)) {
            var next = f.m_next;
            if (prev) {
               prev.m_next = next;
            }
            else {
               body1.m_fixtureList = next;
            }
            body1.m_fixtureCount--;
            f.m_next = body2.m_fixtureList;
            body2.m_fixtureList = f;
            body2.m_fixtureCount++;
            f.m_body = body2;
            f = next;
         }
         else {
            prev = f;
            f = f.m_next;
         }
      }
      body1.ResetMassData();
      body2.ResetMassData();
      var center1 = body1.GetWorldCenter();
      var center2 = body2.GetWorldCenter();
      var velocity1 = b2Math.AddVV(linearVelocity, b2Math.CrossFV(angularVelocity, b2Math.SubtractVV(center1, center)));
      var velocity2 = b2Math.AddVV(linearVelocity, b2Math.CrossFV(angularVelocity, b2Math.SubtractVV(center2, center)));
      body1.SetLinearVelocity(velocity1);
      body2.SetLinearVelocity(velocity2);
      body1.SetAngularVelocity(angularVelocity);
      body2.SetAngularVelocity(angularVelocity);
      body1.SynchronizeFixtures();
      body2.SynchronizeFixtures();
      return body2;
   }
   b2Body.prototype.Merge = function (other) {
      var f;
      for (f = other.m_fixtureList;
      f;) {
         var next = f.m_next;
         other.m_fixtureCount--;
         f.m_next = this.m_fixtureList;
         this.m_fixtureList = f;
         this.m_fixtureCount++;
         f.m_body = body2;
         f = next;
      }
      body1.m_fixtureCount = 0;
      var body1 = this;
      var body2 = other;
      var center1 = body1.GetWorldCenter();
      var center2 = body2.GetWorldCenter();
      var velocity1 = body1.GetLinearVelocity().Copy();
      var velocity2 = body2.GetLinearVelocity().Copy();
      var angular1 = body1.GetAngularVelocity();
      var angular = body2.GetAngularVelocity();
      body1.ResetMassData();
      this.SynchronizeFixtures();
   }
   b2Body.prototype.GetMass = function () {
      return this.m_mass;
   }
   b2Body.prototype.GetInertia = function () {
      return this.m_I;
   }
   b2Body.prototype.GetMassData = function (data) {
      data.mass = this.m_mass;
      data.I = this.m_I;
      data.center.SetV(this.m_sweep.localCenter);
   }
   b2Body.prototype.SetMassData = function (massData) {
      b2Settings.b2Assert(this.m_world.IsLocked() == false);
      if (this.m_world.IsLocked() == true) {
         return;
      }
      if (this.m_type != b2Body.b2_dynamicBody) {
         return;
      }
      this.m_invMass = 0.0;
      this.m_I = 0.0;
      this.m_invI = 0.0;
      this.m_mass = massData.mass;
      if (this.m_mass <= 0.0) {
         this.m_mass = 1.0;
      }
      this.m_invMass = 1.0 / this.m_mass;
      if (massData.I > 0.0 && (this.m_flags & b2Body.e_fixedRotationFlag) == 0) {
         this.m_I = massData.I - this.m_mass * (massData.center.x * massData.center.x + massData.center.y * massData.center.y);
         this.m_invI = 1.0 / this.m_I;
      }
      var oldCenter = this.m_sweep.c.Copy();
      this.m_sweep.localCenter.SetV(massData.center);
      this.m_sweep.c0.SetV(b2Math.MulX(this.m_xf, this.m_sweep.localCenter));
      this.m_sweep.c.SetV(this.m_sweep.c0);
      this.m_linearVelocity.x += this.m_angularVelocity * (-(this.m_sweep.c.y - oldCenter.y));
      this.m_linearVelocity.y += this.m_angularVelocity * (+(this.m_sweep.c.x - oldCenter.x));
   }
   b2Body.prototype.ResetMassData = function () {
      this.m_mass = 0.0;
      this.m_invMass = 0.0;
      this.m_I = 0.0;
      this.m_invI = 0.0;
      this.m_sweep.localCenter.SetZero();
      if (this.m_type == b2Body.b2_staticBody || this.m_type == b2Body.b2_kinematicBody) {
         return;
      }
      var center = b2Vec2.Make(0, 0);
      for (var f = this.m_fixtureList; f; f = f.m_next) {
         if (f.m_density == 0.0) {
            continue;
         }
         var massData = f.GetMassData();
         this.m_mass += massData.mass;
         center.x += massData.center.x * massData.mass;
         center.y += massData.center.y * massData.mass;
         this.m_I += massData.I;
      }
      if (this.m_mass > 0.0) {
         this.m_invMass = 1.0 / this.m_mass;
         center.x *= this.m_invMass;
         center.y *= this.m_invMass;
      }
      else {
         this.m_mass = 1.0;
         this.m_invMass = 1.0;
      }
      if (this.m_I > 0.0 && (this.m_flags & b2Body.e_fixedRotationFlag) == 0) {
         this.m_I -= this.m_mass * (center.x * center.x + center.y * center.y);
         this.m_I *= this.m_inertiaScale;
         b2Settings.b2Assert(this.m_I > 0);
         this.m_invI = 1.0 / this.m_I;
      }
      else {
         this.m_I = 0.0;
         this.m_invI = 0.0;
      }
      var oldCenter = this.m_sweep.c.Copy();
      this.m_sweep.localCenter.SetV(center);
      this.m_sweep.c0.SetV(b2Math.MulX(this.m_xf, this.m_sweep.localCenter));
      this.m_sweep.c.SetV(this.m_sweep.c0);
      this.m_linearVelocity.x += this.m_angularVelocity * (-(this.m_sweep.c.y - oldCenter.y));
      this.m_linearVelocity.y += this.m_angularVelocity * (+(this.m_sweep.c.x - oldCenter.x));
   }
   b2Body.prototype.GetWorldPoint = function (localPoint) {
      var A = this.m_xf.R;
      var u = new b2Vec2(A.col1.x * localPoint.x + A.col2.x * localPoint.y, A.col1.y * localPoint.x + A.col2.y * localPoint.y);
      u.x += this.m_xf.position.x;
      u.y += this.m_xf.position.y;
      return u;
   }
   b2Body.prototype.GetWorldVector = function (localVector) {
      return b2Math.MulMV(this.m_xf.R, localVector);
   }
   b2Body.prototype.GetLocalPoint = function (worldPoint) {
      return b2Math.MulXT(this.m_xf, worldPoint);
   }
   b2Body.prototype.GetLocalVector = function (worldVector) {
      return b2Math.MulTMV(this.m_xf.R, worldVector);
   }
   b2Body.prototype.GetLinearVelocityFromWorldPoint = function (worldPoint) {
      return new b2Vec2(this.m_linearVelocity.x - this.m_angularVelocity * (worldPoint.y - this.m_sweep.c.y), this.m_linearVelocity.y + this.m_angularVelocity * (worldPoint.x - this.m_sweep.c.x));
   }
   b2Body.prototype.GetLinearVelocityFromLocalPoint = function (localPoint) {
      var A = this.m_xf.R;
      var worldPoint = new b2Vec2(A.col1.x * localPoint.x + A.col2.x * localPoint.y, A.col1.y * localPoint.x + A.col2.y * localPoint.y);
      worldPoint.x += this.m_xf.position.x;
      worldPoint.y += this.m_xf.position.y;
      return new b2Vec2(this.m_linearVelocity.x - this.m_angularVelocity * (worldPoint.y - this.m_sweep.c.y), this.m_linearVelocity.y + this.m_angularVelocity * (worldPoint.x - this.m_sweep.c.x));
   }
   b2Body.prototype.GetLinearDamping = function () {
      return this.m_linearDamping;
   }
   b2Body.prototype.SetLinearDamping = function (linearDamping) {
      if (linearDamping === undefined) linearDamping = 0;
      this.m_linearDamping = linearDamping;
   }
   b2Body.prototype.GetAngularDamping = function () {
      return this.m_angularDamping;
   }
   b2Body.prototype.SetAngularDamping = function (angularDamping) {
      if (angularDamping === undefined) angularDamping = 0;
      this.m_angularDamping = angularDamping;
   }
   b2Body.prototype.SetType = function (type) {
      if (type === undefined) type = 0;
      if (this.m_type == type) {
         return;
      }
      this.m_type = type;
      this.ResetMassData();
      if (this.m_type == b2Body.b2_staticBody) {
         this.m_linearVelocity.SetZero();
         this.m_angularVelocity = 0.0;
      }
      this.SetAwake(true);
      this.m_force.SetZero();
      this.m_torque = 0.0;
      for (var ce = this.m_contactList; ce; ce = ce.next) {
         ce.contact.FlagForFiltering();
      }
   }
   b2Body.prototype.GetType = function () {
      return this.m_type;
   }
   b2Body.prototype.SetBullet = function (flag) {
      if (flag) {
         this.m_flags |= b2Body.e_bulletFlag;
      }
      else {
         this.m_flags &= ~b2Body.e_bulletFlag;
      }
   }
   b2Body.prototype.IsBullet = function () {
      return (this.m_flags & b2Body.e_bulletFlag) == b2Body.e_bulletFlag;
   }
   b2Body.prototype.SetSleepingAllowed = function (flag) {
      if (flag) {
         this.m_flags |= b2Body.e_allowSleepFlag;
      }
      else {
         this.m_flags &= ~b2Body.e_allowSleepFlag;
         this.SetAwake(true);
      }
   }
   b2Body.prototype.SetAwake = function (flag) {
      if (flag) {
         this.m_flags |= b2Body.e_awakeFlag;
         this.m_sleepTime = 0.0;
      }
      else {
         this.m_flags &= ~b2Body.e_awakeFlag;
         this.m_sleepTime = 0.0;
         this.m_linearVelocity.SetZero();
         this.m_angularVelocity = 0.0;
         this.m_force.SetZero();
         this.m_torque = 0.0;
      }
   }
   b2Body.prototype.IsAwake = function () {
      return (this.m_flags & b2Body.e_awakeFlag) == b2Body.e_awakeFlag;
   }
   b2Body.prototype.SetFixedRotation = function (fixed) {
      if (fixed) {
         this.m_flags |= b2Body.e_fixedRotationFlag;
      }
      else {
         this.m_flags &= ~b2Body.e_fixedRotationFlag;
      }
      this.ResetMassData();
   }
   b2Body.prototype.IsFixedRotation = function () {
      return (this.m_flags & b2Body.e_fixedRotationFlag) == b2Body.e_fixedRotationFlag;
   }
   b2Body.prototype.SetActive = function (flag) {
      if (flag == this.IsActive()) {
         return;
      }
      var broadPhase;
      var f;
      if (flag) {
         this.m_flags |= b2Body.e_activeFlag;
         broadPhase = this.m_world.m_contactManager.m_broadPhase;
         for (f = this.m_fixtureList;
         f; f = f.m_next) {
            f.CreateProxy(broadPhase, this.m_xf);
         }
      }
      else {
         this.m_flags &= ~b2Body.e_activeFlag;
         broadPhase = this.m_world.m_contactManager.m_broadPhase;
         for (f = this.m_fixtureList;
         f; f = f.m_next) {
            f.DestroyProxy(broadPhase);
         }
         var ce = this.m_contactList;
         while (ce) {
            var ce0 = ce;
            ce = ce.next;
            this.m_world.m_contactManager.Destroy(ce0.contact);
         }
         this.m_contactList = null;
      }
   }
   b2Body.prototype.IsActive = function () {
      return (this.m_flags & b2Body.e_activeFlag) == b2Body.e_activeFlag;
   }
   b2Body.prototype.IsSleepingAllowed = function () {
      return (this.m_flags & b2Body.e_allowSleepFlag) == b2Body.e_allowSleepFlag;
   }
   b2Body.prototype.GetFixtureList = function () {
      return this.m_fixtureList;
   }
   b2Body.prototype.GetJointList = function () {
      return this.m_jointList;
   }
   b2Body.prototype.GetControllerList = function () {
      return this.m_controllerList;
   }
   b2Body.prototype.GetContactList = function () {
      return this.m_contactList;
   }
   b2Body.prototype.GetNext = function () {
      return this.m_next;
   }
   b2Body.prototype.GetUserData = function () {
      return this.m_userData;
   }
   b2Body.prototype.SetUserData = function (data) {
      this.m_userData = data;
   }
   b2Body.prototype.GetWorld = function () {
      return this.m_world;
   }
   b2Body.prototype.b2Body = function (bd, world) {
      this.m_flags = 0;
      if (bd.bullet) {
         this.m_flags |= b2Body.e_bulletFlag;
      }
      if (bd.fixedRotation) {
         this.m_flags |= b2Body.e_fixedRotationFlag;
      }
      if (bd.allowSleep) {
         this.m_flags |= b2Body.e_allowSleepFlag;
      }
      if (bd.awake) {
         this.m_flags |= b2Body.e_awakeFlag;
      }
      if (bd.active) {
         this.m_flags |= b2Body.e_activeFlag;
      }
      this.m_world = world;
      this.m_xf.position.SetV(bd.position);
      this.m_xf.R.Set(bd.angle);
      this.m_sweep.localCenter.SetZero();
      this.m_sweep.t0 = 1.0;
      this.m_sweep.a0 = this.m_sweep.a = bd.angle;
      var tMat = this.m_xf.R;
      var tVec = this.m_sweep.localCenter;
      this.m_sweep.c.x = (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
      this.m_sweep.c.y = (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
      this.m_sweep.c.x += this.m_xf.position.x;
      this.m_sweep.c.y += this.m_xf.position.y;
      this.m_sweep.c0.SetV(this.m_sweep.c);
      this.m_jointList = null;
      this.m_controllerList = null;
      this.m_contactList = null;
      this.m_controllerCount = 0;
      this.m_prev = null;
      this.m_next = null;
      this.m_linearVelocity.SetV(bd.linearVelocity);
      this.m_angularVelocity = bd.angularVelocity;
      this.m_linearDamping = bd.linearDamping;
      this.m_angularDamping = bd.angularDamping;
      this.m_force.Set(0.0, 0.0);
      this.m_torque = 0.0;
      this.m_sleepTime = 0.0;
      this.m_type = bd.type;
      if (this.m_type == b2Body.b2_dynamicBody) {
         this.m_mass = 1.0;
         this.m_invMass = 1.0;
      }
      else {
         this.m_mass = 0.0;
         this.m_invMass = 0.0;
      }
      this.m_I = 0.0;
      this.m_invI = 0.0;
      this.m_inertiaScale = bd.inertiaScale;
      this.m_userData = bd.userData;
      this.m_fixtureList = null;
      this.m_fixtureCount = 0;
   }
   b2Body.prototype.SynchronizeFixtures = function () {
      var xf1 = b2Body.s_xf1;
      xf1.R.Set(this.m_sweep.a0);
      var tMat = xf1.R;
      var tVec = this.m_sweep.localCenter;
      xf1.position.x = this.m_sweep.c0.x - (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
      xf1.position.y = this.m_sweep.c0.y - (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
      var f;
      var broadPhase = this.m_world.m_contactManager.m_broadPhase;
      for (f = this.m_fixtureList;
      f; f = f.m_next) {
         f.Synchronize(broadPhase, xf1, this.m_xf);
      }
   }
   b2Body.prototype.SynchronizeTransform = function () {
      this.m_xf.R.Set(this.m_sweep.a);
      var tMat = this.m_xf.R;
      var tVec = this.m_sweep.localCenter;
      this.m_xf.position.x = this.m_sweep.c.x - (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
      this.m_xf.position.y = this.m_sweep.c.y - (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
   }
   b2Body.prototype.ShouldCollide = function (other) {
      if (this.m_type != b2Body.b2_dynamicBody && other.m_type != b2Body.b2_dynamicBody) {
         return false;
      }
      for (var jn = this.m_jointList; jn; jn = jn.next) {
         if (jn.other == other) if (jn.joint.m_collideConnected == false) {
            return false;
         }
      }
      return true;
   }
   b2Body.prototype.Advance = function (t) {
      if (t === undefined) t = 0;
      this.m_sweep.Advance(t);
      this.m_sweep.c.SetV(this.m_sweep.c0);
      this.m_sweep.a = this.m_sweep.a0;
      this.SynchronizeTransform();
   }
   Box2D.postDefs.push(function () {
      Box2D.Dynamics.b2Body.s_xf1 = new b2Transform();
      Box2D.Dynamics.b2Body.e_islandFlag = 0x0001;
      Box2D.Dynamics.b2Body.e_awakeFlag = 0x0002;
      Box2D.Dynamics.b2Body.e_allowSleepFlag = 0x0004;
      Box2D.Dynamics.b2Body.e_bulletFlag = 0x0008;
      Box2D.Dynamics.b2Body.e_fixedRotationFlag = 0x0010;
      Box2D.Dynamics.b2Body.e_activeFlag = 0x0020;
      Box2D.Dynamics.b2Body.b2_staticBody = 0;
      Box2D.Dynamics.b2Body.b2_kinematicBody = 1;
      Box2D.Dynamics.b2Body.b2_dynamicBody = 2;
   });
   b2BodyDef.b2BodyDef = function () {
      this.position = new b2Vec2();
      this.linearVelocity = new b2Vec2();
   };
   b2BodyDef.prototype.b2BodyDef = function () {
      this.userData = null;
      this.position.Set(0.0, 0.0);
      this.angle = 0.0;
      this.linearVelocity.Set(0, 0);
      this.angularVelocity = 0.0;
      this.linearDamping = 0.0;
      this.angularDamping = 0.0;
      this.allowSleep = true;
      this.awake = true;
      this.fixedRotation = false;
      this.bullet = false;
      this.type = b2Body.b2_staticBody;
      this.active = true;
      this.inertiaScale = 1.0;
   }
   b2ContactFilter.b2ContactFilter = function () {};
   b2ContactFilter.prototype.ShouldCollide = function (fixtureA, fixtureB) {
      var filter1 = fixtureA.GetFilterData();
      var filter2 = fixtureB.GetFilterData();
      if (filter1.groupIndex == filter2.groupIndex && filter1.groupIndex != 0) {
         return filter1.groupIndex > 0;
      }
      var collide = (filter1.maskBits & filter2.categoryBits) != 0 && (filter1.categoryBits & filter2.maskBits) != 0;
      return collide;
   }
   b2ContactFilter.prototype.RayCollide = function (userData, fixture) {
      if (!userData) return true;
      return this.ShouldCollide((userData instanceof b2Fixture ? userData : null), fixture);
   }
   Box2D.postDefs.push(function () {
      Box2D.Dynamics.b2ContactFilter.b2_defaultFilter = new b2ContactFilter();
   });
   b2ContactImpulse.b2ContactImpulse = function () {
      this.normalImpulses = new Vector_a2j_Number(b2Settings.b2_maxManifoldPoints);
      this.tangentImpulses = new Vector_a2j_Number(b2Settings.b2_maxManifoldPoints);
   };
   b2ContactListener.b2ContactListener = function () {};
   b2ContactListener.prototype.BeginContact = function (contact) {}
   b2ContactListener.prototype.EndContact = function (contact) {}
   b2ContactListener.prototype.PreSolve = function (contact, oldManifold) {}
   b2ContactListener.prototype.PostSolve = function (contact, impulse) {}
   Box2D.postDefs.push(function () {
      Box2D.Dynamics.b2ContactListener.b2_defaultListener = new b2ContactListener();
   });
   b2ContactManager.b2ContactManager = function () {};
   b2ContactManager.prototype.b2ContactManager = function () {
      this.m_world = null;
      this.m_contactCount = 0;
      this.m_contactFilter = b2ContactFilter.b2_defaultFilter;
      this.m_contactListener = b2ContactListener.b2_defaultListener;
      this.m_contactFactory = new b2ContactFactory(this.m_allocator);
      this.m_broadPhase = new b2DynamicTreeBroadPhase();
   }
   b2ContactManager.prototype.AddPair = function (proxyUserDataA, proxyUserDataB) {
      var fixtureA = (proxyUserDataA instanceof b2Fixture ? proxyUserDataA : null);
      var fixtureB = (proxyUserDataB instanceof b2Fixture ? proxyUserDataB : null);
      var bodyA = fixtureA.GetBody();
      var bodyB = fixtureB.GetBody();
      if (bodyA == bodyB) return;
      var edge = bodyB.GetContactList();
      while (edge) {
         if (edge.other == bodyA) {
            var fA = edge.contact.GetFixtureA();
            var fB = edge.contact.GetFixtureB();
            if (fA == fixtureA && fB == fixtureB) return;
            if (fA == fixtureB && fB == fixtureA) return;
         }
         edge = edge.next;
      }
      if (bodyB.ShouldCollide(bodyA) == false) {
         return;
      }
      if (this.m_contactFilter.ShouldCollide(fixtureA, fixtureB) == false) {
         return;
      }
      var c = this.m_contactFactory.Create(fixtureA, fixtureB);
      fixtureA = c.GetFixtureA();
      fixtureB = c.GetFixtureB();
      bodyA = fixtureA.m_body;
      bodyB = fixtureB.m_body;
      c.m_prev = null;
      c.m_next = this.m_world.m_contactList;
      if (this.m_world.m_contactList != null) {
         this.m_world.m_contactList.m_prev = c;
      }
      this.m_world.m_contactList = c;
      c.m_nodeA.contact = c;
      c.m_nodeA.other = bodyB;
      c.m_nodeA.prev = null;
      c.m_nodeA.next = bodyA.m_contactList;
      if (bodyA.m_contactList != null) {
         bodyA.m_contactList.prev = c.m_nodeA;
      }
      bodyA.m_contactList = c.m_nodeA;
      c.m_nodeB.contact = c;
      c.m_nodeB.other = bodyA;
      c.m_nodeB.prev = null;
      c.m_nodeB.next = bodyB.m_contactList;
      if (bodyB.m_contactList != null) {
         bodyB.m_contactList.prev = c.m_nodeB;
      }
      bodyB.m_contactList = c.m_nodeB;
      ++this.m_world.m_contactCount;
      return;
   }
   b2ContactManager.prototype.FindNewContacts = function () {
      this.m_broadPhase.UpdatePairs(Box2D.generateCallback(this, this.AddPair));
   }
   b2ContactManager.prototype.Destroy = function (c) {
      var fixtureA = c.GetFixtureA();
      var fixtureB = c.GetFixtureB();
      var bodyA = fixtureA.GetBody();
      var bodyB = fixtureB.GetBody();
      if (c.IsTouching()) {
         this.m_contactListener.EndContact(c);
      }
      if (c.m_prev) {
         c.m_prev.m_next = c.m_next;
      }
      if (c.m_next) {
         c.m_next.m_prev = c.m_prev;
      }
      if (c == this.m_world.m_contactList) {
         this.m_world.m_contactList = c.m_next;
      }
      if (c.m_nodeA.prev) {
         c.m_nodeA.prev.next = c.m_nodeA.next;
      }
      if (c.m_nodeA.next) {
         c.m_nodeA.next.prev = c.m_nodeA.prev;
      }
      if (c.m_nodeA == bodyA.m_contactList) {
         bodyA.m_contactList = c.m_nodeA.next;
      }
      if (c.m_nodeB.prev) {
         c.m_nodeB.prev.next = c.m_nodeB.next;
      }
      if (c.m_nodeB.next) {
         c.m_nodeB.next.prev = c.m_nodeB.prev;
      }
      if (c.m_nodeB == bodyB.m_contactList) {
         bodyB.m_contactList = c.m_nodeB.next;
      }
      this.m_contactFactory.Destroy(c);
      --this.m_contactCount;
   }
   b2ContactManager.prototype.Collide = function () {
      var c = this.m_world.m_contactList;
      while (c) {
         var fixtureA = c.GetFixtureA();
         var fixtureB = c.GetFixtureB();
         var bodyA = fixtureA.GetBody();
         var bodyB = fixtureB.GetBody();
         if (bodyA.IsAwake() == false && bodyB.IsAwake() == false) {
            c = c.GetNext();
            continue;
         }
         if (c.m_flags & b2Contact.e_filterFlag) {
            if (bodyB.ShouldCollide(bodyA) == false) {
               var cNuke = c;
               c = cNuke.GetNext();
               this.Destroy(cNuke);
               continue;
            }
            if (this.m_contactFilter.ShouldCollide(fixtureA, fixtureB) == false) {
               cNuke = c;
               c = cNuke.GetNext();
               this.Destroy(cNuke);
               continue;
            }
            c.m_flags &= ~b2Contact.e_filterFlag;
         }
         var proxyA = fixtureA.m_proxy;
         var proxyB = fixtureB.m_proxy;
         var overlap = this.m_broadPhase.TestOverlap(proxyA, proxyB);
         if (overlap == false) {
            cNuke = c;
            c = cNuke.GetNext();
            this.Destroy(cNuke);
            continue;
         }
         c.Update(this.m_contactListener);
         c = c.GetNext();
      }
   }
   Box2D.postDefs.push(function () {
      Box2D.Dynamics.b2ContactManager.s_evalCP = new b2ContactPoint();
   });
   b2DebugDraw.b2DebugDraw = function () {};
   b2DebugDraw.prototype.b2DebugDraw = function () {}
   b2DebugDraw.prototype.SetFlags = function (flags) {
      if (flags === undefined) flags = 0;
   }
   b2DebugDraw.prototype.GetFlags = function () {}
   b2DebugDraw.prototype.AppendFlags = function (flags) {
      if (flags === undefined) flags = 0;
   }
   b2DebugDraw.prototype.ClearFlags = function (flags) {
      if (flags === undefined) flags = 0;
   }
   b2DebugDraw.prototype.SetSprite = function (sprite) {}
   b2DebugDraw.prototype.GetSprite = function () {}
   b2DebugDraw.prototype.SetDrawScale = function (drawScale) {
      if (drawScale === undefined) drawScale = 0;
   }
   b2DebugDraw.prototype.GetDrawScale = function () {}
   b2DebugDraw.prototype.SetLineThickness = function (lineThickness) {
      if (lineThickness === undefined) lineThickness = 0;
   }
   b2DebugDraw.prototype.GetLineThickness = function () {}
   b2DebugDraw.prototype.SetAlpha = function (alpha) {
      if (alpha === undefined) alpha = 0;
   }
   b2DebugDraw.prototype.GetAlpha = function () {}
   b2DebugDraw.prototype.SetFillAlpha = function (alpha) {
      if (alpha === undefined) alpha = 0;
   }
   b2DebugDraw.prototype.GetFillAlpha = function () {}
   b2DebugDraw.prototype.SetXFormScale = function (xformScale) {
      if (xformScale === undefined) xformScale = 0;
   }
   b2DebugDraw.prototype.GetXFormScale = function () {}
   b2DebugDraw.prototype.DrawPolygon = function (vertices, vertexCount, color) {
      if (vertexCount === undefined) vertexCount = 0;
   }
   b2DebugDraw.prototype.DrawSolidPolygon = function (vertices, vertexCount, color) {
      if (vertexCount === undefined) vertexCount = 0;
   }
   b2DebugDraw.prototype.DrawCircle = function (center, radius, color) {
      if (radius === undefined) radius = 0;
   }
   b2DebugDraw.prototype.DrawSolidCircle = function (center, radius, axis, color) {
      if (radius === undefined) radius = 0;
   }
   b2DebugDraw.prototype.DrawSegment = function (p1, p2, color) {}
   b2DebugDraw.prototype.DrawTransform = function (xf) {}
   Box2D.postDefs.push(function () {
      Box2D.Dynamics.b2DebugDraw.e_shapeBit = 0x0001;
      Box2D.Dynamics.b2DebugDraw.e_jointBit = 0x0002;
      Box2D.Dynamics.b2DebugDraw.e_aabbBit = 0x0004;
      Box2D.Dynamics.b2DebugDraw.e_pairBit = 0x0008;
      Box2D.Dynamics.b2DebugDraw.e_centerOfMassBit = 0x0010;
      Box2D.Dynamics.b2DebugDraw.e_controllerBit = 0x0020;
   });
   b2DestructionListener.b2DestructionListener = function () {};
   b2DestructionListener.prototype.SayGoodbyeJoint = function (joint) {}
   b2DestructionListener.prototype.SayGoodbyeFixture = function (fixture) {}
   b2FilterData.b2FilterData = function () {
      this.categoryBits = 0x0001;
      this.maskBits = 0xFFFF;
      this.groupIndex = 0;
   };
   b2FilterData.prototype.Copy = function () {
      var copy = new b2FilterData();
      copy.categoryBits = this.categoryBits;
      copy.maskBits = this.maskBits;
      copy.groupIndex = this.groupIndex;
      return copy;
   }
   b2Fixture.b2Fixture = function () {
      this.m_filter = new b2FilterData();
   };
   b2Fixture.prototype.GetType = function () {
      return this.m_shape.GetType();
   }
   b2Fixture.prototype.GetShape = function () {
      return this.m_shape;
   }
   b2Fixture.prototype.SetSensor = function (sensor) {
      if (this.m_isSensor == sensor) return;
      this.m_isSensor = sensor;
      if (this.m_body == null) return;
      var edge = this.m_body.GetContactList();
      while (edge) {
         var contact = edge.contact;
         var fixtureA = contact.GetFixtureA();
         var fixtureB = contact.GetFixtureB();
         if (fixtureA == this || fixtureB == this) contact.SetSensor(fixtureA.IsSensor() || fixtureB.IsSensor());
         edge = edge.next;
      }
   }
   b2Fixture.prototype.IsSensor = function () {
      return this.m_isSensor;
   }
   b2Fixture.prototype.SetFilterData = function (filter) {
      this.m_filter = filter.Copy();
      if (this.m_body) return;
      var edge = this.m_body.GetContactList();
      while (edge) {
         var contact = edge.contact;
         var fixtureA = contact.GetFixtureA();
         var fixtureB = contact.GetFixtureB();
         if (fixtureA == this || fixtureB == this) contact.FlagForFiltering();
         edge = edge.next;
      }
   }
   b2Fixture.prototype.GetFilterData = function () {
      return this.m_filter.Copy();
   }
   b2Fixture.prototype.GetBody = function () {
      return this.m_body;
   }
   b2Fixture.prototype.GetNext = function () {
      return this.m_next;
   }
   b2Fixture.prototype.GetUserData = function () {
      return this.m_userData;
   }
   b2Fixture.prototype.SetUserData = function (data) {
      this.m_userData = data;
   }
   b2Fixture.prototype.TestPoint = function (p) {
      return this.m_shape.TestPoint(this.m_body.GetTransform(), p);
   }
   b2Fixture.prototype.RayCast = function (output, input) {
      return this.m_shape.RayCast(output, input, this.m_body.GetTransform());
   }
   b2Fixture.prototype.GetMassData = function (massData) {
      if (massData === undefined) massData = null;
      if (massData == null) {
         massData = new b2MassData();
      }
      this.m_shape.ComputeMass(massData, this.m_density);
      return massData;
   }
   b2Fixture.prototype.SetDensity = function (density) {
      if (density === undefined) density = 0;
      this.m_density = density;
   }
   b2Fixture.prototype.GetDensity = function () {
      return this.m_density;
   }
   b2Fixture.prototype.GetFriction = function () {
      return this.m_friction;
   }
   b2Fixture.prototype.SetFriction = function (friction) {
      if (friction === undefined) friction = 0;
      this.m_friction = friction;
   }
   b2Fixture.prototype.GetRestitution = function () {
      return this.m_restitution;
   }
   b2Fixture.prototype.SetRestitution = function (restitution) {
      if (restitution === undefined) restitution = 0;
      this.m_restitution = restitution;
   }
   b2Fixture.prototype.GetAABB = function () {
      return this.m_aabb;
   }
   b2Fixture.prototype.b2Fixture = function () {
      this.m_aabb = new b2AABB();
      this.m_userData = null;
      this.m_body = null;
      this.m_next = null;
      this.m_shape = null;
      this.m_density = 0.0;
      this.m_friction = 0.0;
      this.m_restitution = 0.0;
   }
   b2Fixture.prototype.Create = function (body, xf, def) {
      this.m_userData = def.userData;
      this.m_friction = def.friction;
      this.m_restitution = def.restitution;
      this.m_body = body;
      this.m_next = null;
      this.m_filter = def.filter.Copy();
      this.m_isSensor = def.isSensor;
      this.m_shape = def.shape.Copy();
      this.m_density = def.density;
   }
   b2Fixture.prototype.Destroy = function () {
      this.m_shape = null;
   }
   b2Fixture.prototype.CreateProxy = function (broadPhase, xf) {
      this.m_shape.ComputeAABB(this.m_aabb, xf);
      this.m_proxy = broadPhase.CreateProxy(this.m_aabb, this);
   }
   b2Fixture.prototype.DestroyProxy = function (broadPhase) {
      if (this.m_proxy == null) {
         return;
      }
      broadPhase.DestroyProxy(this.m_proxy);
      this.m_proxy = null;
   }
   b2Fixture.prototype.Synchronize = function (broadPhase, transform1, transform2) {
      if (!this.m_proxy) return;
      var aabb1 = new b2AABB();
      var aabb2 = new b2AABB();
      this.m_shape.ComputeAABB(aabb1, transform1);
      this.m_shape.ComputeAABB(aabb2, transform2);
      this.m_aabb.Combine(aabb1, aabb2);
      var displacement = b2Math.SubtractVV(transform2.position, transform1.position);
      broadPhase.MoveProxy(this.m_proxy, this.m_aabb, displacement);
   }
   b2FixtureDef.b2FixtureDef = function () {
      this.filter = new b2FilterData();
   };
   b2FixtureDef.prototype.b2FixtureDef = function () {
      this.shape = null;
      this.userData = null;
      this.friction = 0.2;
      this.restitution = 0.0;
      this.density = 0.0;
      this.filter.categoryBits = 0x0001;
      this.filter.maskBits = 0xFFFF;
      this.filter.groupIndex = 0;
      this.isSensor = false;
   }
   b2Island.b2Island = function () {};
   b2Island.prototype.b2Island = function () {
      this.m_bodies = new Vector();
      this.m_contacts = new Vector();
      this.m_joints = new Vector();
   }
   b2Island.prototype.Initialize = function (bodyCapacity, contactCapacity, jointCapacity, allocator, listener, contactSolver) {
      if (bodyCapacity === undefined) bodyCapacity = 0;
      if (contactCapacity === undefined) contactCapacity = 0;
      if (jointCapacity === undefined) jointCapacity = 0;
      var i = 0;
      this.m_bodyCapacity = bodyCapacity;
      this.m_contactCapacity = contactCapacity;
      this.m_jointCapacity = jointCapacity;
      this.m_bodyCount = 0;
      this.m_contactCount = 0;
      this.m_jointCount = 0;
      this.m_allocator = allocator;
      this.m_listener = listener;
      this.m_contactSolver = contactSolver;
      for (i = this.m_bodies.length;
      i < bodyCapacity; i++)
      this.m_bodies[i] = null;
      for (i = this.m_contacts.length;
      i < contactCapacity; i++)
      this.m_contacts[i] = null;
      for (i = this.m_joints.length;
      i < jointCapacity; i++)
      this.m_joints[i] = null;
   }
   b2Island.prototype.Clear = function () {
      this.m_bodyCount = 0;
      this.m_contactCount = 0;
      this.m_jointCount = 0;
   }
   b2Island.prototype.Solve = function (step, gravity, allowSleep) {
      var i = 0;
      var j = 0;
      var b;
      var joint;
      for (i = 0;
      i < this.m_bodyCount; ++i) {
         b = this.m_bodies[i];
         if (b.GetType() != b2Body.b2_dynamicBody) continue;
         b.m_linearVelocity.x += step.dt * (gravity.x + b.m_invMass * b.m_force.x);
         b.m_linearVelocity.y += step.dt * (gravity.y + b.m_invMass * b.m_force.y);
         b.m_angularVelocity += step.dt * b.m_invI * b.m_torque;
         b.m_linearVelocity.Multiply(b2Math.Clamp(1.0 - step.dt * b.m_linearDamping, 0.0, 1.0));
         b.m_angularVelocity *= b2Math.Clamp(1.0 - step.dt * b.m_angularDamping, 0.0, 1.0);
      }
      this.m_contactSolver.Initialize(step, this.m_contacts, this.m_contactCount, this.m_allocator);
      var contactSolver = this.m_contactSolver;
      contactSolver.InitVelocityConstraints(step);
      for (i = 0;
      i < this.m_jointCount; ++i) {
         joint = this.m_joints[i];
         joint.InitVelocityConstraints(step);
      }
      for (i = 0;
      i < step.velocityIterations; ++i) {
         for (j = 0;
         j < this.m_jointCount; ++j) {
            joint = this.m_joints[j];
            joint.SolveVelocityConstraints(step);
         }
         contactSolver.SolveVelocityConstraints();
      }
      for (i = 0;
      i < this.m_jointCount; ++i) {
         joint = this.m_joints[i];
         joint.FinalizeVelocityConstraints();
      }
      contactSolver.FinalizeVelocityConstraints();
      for (i = 0;
      i < this.m_bodyCount; ++i) {
         b = this.m_bodies[i];
         if (b.GetType() == b2Body.b2_staticBody) continue;
         var translationX = step.dt * b.m_linearVelocity.x;
         var translationY = step.dt * b.m_linearVelocity.y;
         if ((translationX * translationX + translationY * translationY) > b2Settings.b2_maxTranslationSquared) {
            b.m_linearVelocity.Normalize();
            b.m_linearVelocity.x *= b2Settings.b2_maxTranslation * step.inv_dt;
            b.m_linearVelocity.y *= b2Settings.b2_maxTranslation * step.inv_dt;
         }
         var rotation = step.dt * b.m_angularVelocity;
         if (rotation * rotation > b2Settings.b2_maxRotationSquared) {
            if (b.m_angularVelocity < 0.0) {
               b.m_angularVelocity = (-b2Settings.b2_maxRotation * step.inv_dt);
            }
            else {
               b.m_angularVelocity = b2Settings.b2_maxRotation * step.inv_dt;
            }
         }
         b.m_sweep.c0.SetV(b.m_sweep.c);
         b.m_sweep.a0 = b.m_sweep.a;
         b.m_sweep.c.x += step.dt * b.m_linearVelocity.x;
         b.m_sweep.c.y += step.dt * b.m_linearVelocity.y;
         b.m_sweep.a += step.dt * b.m_angularVelocity;
         b.SynchronizeTransform();
      }
      for (i = 0;
      i < step.positionIterations; ++i) {
         var contactsOkay = contactSolver.SolvePositionConstraints(b2Settings.b2_contactBaumgarte);
         var jointsOkay = true;
         for (j = 0;
         j < this.m_jointCount; ++j) {
            joint = this.m_joints[j];
            var jointOkay = joint.SolvePositionConstraints(b2Settings.b2_contactBaumgarte);
            jointsOkay = jointsOkay && jointOkay;
         }
         if (contactsOkay && jointsOkay) {
            break;
         }
      }
      this.Report(contactSolver.m_constraints);
      if (allowSleep) {
         var minSleepTime = Number.MAX_VALUE;
         var linTolSqr = b2Settings.b2_linearSleepTolerance * b2Settings.b2_linearSleepTolerance;
         var angTolSqr = b2Settings.b2_angularSleepTolerance * b2Settings.b2_angularSleepTolerance;
         for (i = 0;
         i < this.m_bodyCount; ++i) {
            b = this.m_bodies[i];
            if (b.GetType() == b2Body.b2_staticBody) {
               continue;
            }
            if ((b.m_flags & b2Body.e_allowSleepFlag) == 0) {
               b.m_sleepTime = 0.0;
               minSleepTime = 0.0;
            }
            if ((b.m_flags & b2Body.e_allowSleepFlag) == 0 || b.m_angularVelocity * b.m_angularVelocity > angTolSqr || b2Math.Dot(b.m_linearVelocity, b.m_linearVelocity) > linTolSqr) {
               b.m_sleepTime = 0.0;
               minSleepTime = 0.0;
            }
            else {
               b.m_sleepTime += step.dt;
               minSleepTime = b2Math.Min(minSleepTime, b.m_sleepTime);
            }
         }
         if (minSleepTime >= b2Settings.b2_timeToSleep) {
            for (i = 0;
            i < this.m_bodyCount; ++i) {
               b = this.m_bodies[i];
               b.SetAwake(false);
            }
         }
      }
   }
   b2Island.prototype.SolveTOI = function (subStep) {
      var i = 0;
      var j = 0;
      this.m_contactSolver.Initialize(subStep, this.m_contacts, this.m_contactCount, this.m_allocator);
      var contactSolver = this.m_contactSolver;
      for (i = 0;
      i < this.m_jointCount; ++i) {
         this.m_joints[i].InitVelocityConstraints(subStep);
      }
      for (i = 0;
      i < subStep.velocityIterations; ++i) {
         contactSolver.SolveVelocityConstraints();
         for (j = 0;
         j < this.m_jointCount; ++j) {
            this.m_joints[j].SolveVelocityConstraints(subStep);
         }
      }
      for (i = 0;
      i < this.m_bodyCount; ++i) {
         var b = this.m_bodies[i];
         if (b.GetType() == b2Body.b2_staticBody) continue;
         var translationX = subStep.dt * b.m_linearVelocity.x;
         var translationY = subStep.dt * b.m_linearVelocity.y;
         if ((translationX * translationX + translationY * translationY) > b2Settings.b2_maxTranslationSquared) {
            b.m_linearVelocity.Normalize();
            b.m_linearVelocity.x *= b2Settings.b2_maxTranslation * subStep.inv_dt;
            b.m_linearVelocity.y *= b2Settings.b2_maxTranslation * subStep.inv_dt;
         }
         var rotation = subStep.dt * b.m_angularVelocity;
         if (rotation * rotation > b2Settings.b2_maxRotationSquared) {
            if (b.m_angularVelocity < 0.0) {
               b.m_angularVelocity = (-b2Settings.b2_maxRotation * subStep.inv_dt);
            }
            else {
               b.m_angularVelocity = b2Settings.b2_maxRotation * subStep.inv_dt;
            }
         }
         b.m_sweep.c0.SetV(b.m_sweep.c);
         b.m_sweep.a0 = b.m_sweep.a;
         b.m_sweep.c.x += subStep.dt * b.m_linearVelocity.x;
         b.m_sweep.c.y += subStep.dt * b.m_linearVelocity.y;
         b.m_sweep.a += subStep.dt * b.m_angularVelocity;
         b.SynchronizeTransform();
      }
      var k_toiBaumgarte = 0.75;
      for (i = 0;
      i < subStep.positionIterations; ++i) {
         var contactsOkay = contactSolver.SolvePositionConstraints(k_toiBaumgarte);
         var jointsOkay = true;
         for (j = 0;
         j < this.m_jointCount; ++j) {
            var jointOkay = this.m_joints[j].SolvePositionConstraints(b2Settings.b2_contactBaumgarte);
            jointsOkay = jointsOkay && jointOkay;
         }
         if (contactsOkay && jointsOkay) {
            break;
         }
      }
      this.Report(contactSolver.m_constraints);
   }
   b2Island.prototype.Report = function (constraints) {
      if (this.m_listener == null) {
         return;
      }
      for (var i = 0; i < this.m_contactCount; ++i) {
         var c = this.m_contacts[i];
         var cc = constraints[i];
         for (var j = 0; j < cc.pointCount; ++j) {
            b2Island.s_impulse.normalImpulses[j] = cc.points[j].normalImpulse;
            b2Island.s_impulse.tangentImpulses[j] = cc.points[j].tangentImpulse;
         }
         this.m_listener.PostSolve(c, b2Island.s_impulse);
      }
   }
   b2Island.prototype.AddBody = function (body) {
      body.m_islandIndex = this.m_bodyCount;
      this.m_bodies[this.m_bodyCount++] = body;
   }
   b2Island.prototype.AddContact = function (contact) {
      this.m_contacts[this.m_contactCount++] = contact;
   }
   b2Island.prototype.AddJoint = function (joint) {
      this.m_joints[this.m_jointCount++] = joint;
   }
   Box2D.postDefs.push(function () {
      Box2D.Dynamics.b2Island.s_impulse = new b2ContactImpulse();
   });
   b2TimeStep.b2TimeStep = function () {};
   b2TimeStep.prototype.Set = function (step) {
      this.dt = step.dt;
      this.inv_dt = step.inv_dt;
      this.positionIterations = step.positionIterations;
      this.velocityIterations = step.velocityIterations;
      this.warmStarting = step.warmStarting;
   }
   b2World.b2World = function () {
      this.s_stack = new Vector();
      this.m_contactManager = new b2ContactManager();
      this.m_contactSolver = new b2ContactSolver();
      this.m_island = new b2Island();
   };
   b2World.prototype.b2World = function (gravity, doSleep) {
      this.m_destructionListener = null;
      this.m_debugDraw = null;
      this.m_bodyList = null;
      this.m_contactList = null;
      this.m_jointList = null;
      this.m_controllerList = null;
      this.m_bodyCount = 0;
      this.m_contactCount = 0;
      this.m_jointCount = 0;
      this.m_controllerCount = 0;
      b2World.m_warmStarting = true;
      b2World.m_continuousPhysics = true;
      this.m_allowSleep = doSleep;
      this.m_gravity = gravity;
      this.m_inv_dt0 = 0.0;
      this.m_contactManager.m_world = this;
      var bd = new b2BodyDef();
      this.m_groundBody = this.CreateBody(bd);
   }
   b2World.prototype.SetDestructionListener = function (listener) {
      this.m_destructionListener = listener;
   }
   b2World.prototype.SetContactFilter = function (filter) {
      this.m_contactManager.m_contactFilter = filter;
   }
   b2World.prototype.SetContactListener = function (listener) {
      this.m_contactManager.m_contactListener = listener;
   }
   b2World.prototype.SetDebugDraw = function (debugDraw) {
      this.m_debugDraw = debugDraw;
   }
   b2World.prototype.SetBroadPhase = function (broadPhase) {
      var oldBroadPhase = this.m_contactManager.m_broadPhase;
      this.m_contactManager.m_broadPhase = broadPhase;
      for (var b = this.m_bodyList; b; b = b.m_next) {
         for (var f = b.m_fixtureList; f; f = f.m_next) {
            f.m_proxy = broadPhase.CreateProxy(oldBroadPhase.GetFatAABB(f.m_proxy), f);
         }
      }
   }
   b2World.prototype.Validate = function () {
      this.m_contactManager.m_broadPhase.Validate();
   }
   b2World.prototype.GetProxyCount = function () {
      return this.m_contactManager.m_broadPhase.GetProxyCount();
   }
   b2World.prototype.CreateBody = function (def) {
      if (this.IsLocked() == true) {
         return null;
      }
      var b = new b2Body(def, this);
      b.m_prev = null;
      b.m_next = this.m_bodyList;
      if (this.m_bodyList) {
         this.m_bodyList.m_prev = b;
      }
      this.m_bodyList = b;
      ++this.m_bodyCount;
      return b;
   }
   b2World.prototype.DestroyBody = function (b) {
      if (this.IsLocked() == true) {
         return;
      }
      var jn = b.m_jointList;
      while (jn) {
         var jn0 = jn;
         jn = jn.next;
         if (this.m_destructionListener) {
            this.m_destructionListener.SayGoodbyeJoint(jn0.joint);
         }
         this.DestroyJoint(jn0.joint);
      }
      var coe = b.m_controllerList;
      while (coe) {
         var coe0 = coe;
         coe = coe.nextController;
         coe0.controller.RemoveBody(b);
      }
      var ce = b.m_contactList;
      while (ce) {
         var ce0 = ce;
         ce = ce.next;
         this.m_contactManager.Destroy(ce0.contact);
      }
      b.m_contactList = null;
      var f = b.m_fixtureList;
      while (f) {
         var f0 = f;
         f = f.m_next;
         if (this.m_destructionListener) {
            this.m_destructionListener.SayGoodbyeFixture(f0);
         }
         f0.DestroyProxy(this.m_contactManager.m_broadPhase);
         f0.Destroy();
      }
      b.m_fixtureList = null;
      b.m_fixtureCount = 0;
      if (b.m_prev) {
         b.m_prev.m_next = b.m_next;
      }
      if (b.m_next) {
         b.m_next.m_prev = b.m_prev;
      }
      if (b == this.m_bodyList) {
         this.m_bodyList = b.m_next;
      }--this.m_bodyCount;
   }
   b2World.prototype.CreateJoint = function (def) {
      var j = b2Joint.Create(def, null);
      j.m_prev = null;
      j.m_next = this.m_jointList;
      if (this.m_jointList) {
         this.m_jointList.m_prev = j;
      }
      this.m_jointList = j;
      ++this.m_jointCount;
      j.m_edgeA.joint = j;
      j.m_edgeA.other = j.m_bodyB;
      j.m_edgeA.prev = null;
      j.m_edgeA.next = j.m_bodyA.m_jointList;
      if (j.m_bodyA.m_jointList) j.m_bodyA.m_jointList.prev = j.m_edgeA;
      j.m_bodyA.m_jointList = j.m_edgeA;
      j.m_edgeB.joint = j;
      j.m_edgeB.other = j.m_bodyA;
      j.m_edgeB.prev = null;
      j.m_edgeB.next = j.m_bodyB.m_jointList;
      if (j.m_bodyB.m_jointList) j.m_bodyB.m_jointList.prev = j.m_edgeB;
      j.m_bodyB.m_jointList = j.m_edgeB;
      var bodyA = def.bodyA;
      var bodyB = def.bodyB;
      if (def.collideConnected == false) {
         var edge = bodyB.GetContactList();
         while (edge) {
            if (edge.other == bodyA) {
               edge.contact.FlagForFiltering();
            }
            edge = edge.next;
         }
      }
      return j;
   }
   b2World.prototype.DestroyJoint = function (j) {
      var collideConnected = j.m_collideConnected;
      if (j.m_prev) {
         j.m_prev.m_next = j.m_next;
      }
      if (j.m_next) {
         j.m_next.m_prev = j.m_prev;
      }
      if (j == this.m_jointList) {
         this.m_jointList = j.m_next;
      }
      var bodyA = j.m_bodyA;
      var bodyB = j.m_bodyB;
      bodyA.SetAwake(true);
      bodyB.SetAwake(true);
      if (j.m_edgeA.prev) {
         j.m_edgeA.prev.next = j.m_edgeA.next;
      }
      if (j.m_edgeA.next) {
         j.m_edgeA.next.prev = j.m_edgeA.prev;
      }
      if (j.m_edgeA == bodyA.m_jointList) {
         bodyA.m_jointList = j.m_edgeA.next;
      }
      j.m_edgeA.prev = null;
      j.m_edgeA.next = null;
      if (j.m_edgeB.prev) {
         j.m_edgeB.prev.next = j.m_edgeB.next;
      }
      if (j.m_edgeB.next) {
         j.m_edgeB.next.prev = j.m_edgeB.prev;
      }
      if (j.m_edgeB == bodyB.m_jointList) {
         bodyB.m_jointList = j.m_edgeB.next;
      }
      j.m_edgeB.prev = null;
      j.m_edgeB.next = null;
      b2Joint.Destroy(j, null);
      --this.m_jointCount;
      if (collideConnected == false) {
         var edge = bodyB.GetContactList();
         while (edge) {
            if (edge.other == bodyA) {
               edge.contact.FlagForFiltering();
            }
            edge = edge.next;
         }
      }
   }
   b2World.prototype.AddController = function (c) {
      c.m_next = this.m_controllerList;
      c.m_prev = null;
      this.m_controllerList = c;
      c.m_world = this;
      this.m_controllerCount++;
      return c;
   }
   b2World.prototype.RemoveController = function (c) {
      if (c.m_prev) c.m_prev.m_next = c.m_next;
      if (c.m_next) c.m_next.m_prev = c.m_prev;
      if (this.m_controllerList == c) this.m_controllerList = c.m_next;
      this.m_controllerCount--;
   }
   b2World.prototype.CreateController = function (controller) {
      if (controller.m_world != this) throw new Error("Controller can only be a member of one world");
      controller.m_next = this.m_controllerList;
      controller.m_prev = null;
      if (this.m_controllerList) this.m_controllerList.m_prev = controller;
      this.m_controllerList = controller;
      ++this.m_controllerCount;
      controller.m_world = this;
      return controller;
   }
   b2World.prototype.DestroyController = function (controller) {
      controller.Clear();
      if (controller.m_next) controller.m_next.m_prev = controller.m_prev;
      if (controller.m_prev) controller.m_prev.m_next = controller.m_next;
      if (controller == this.m_controllerList) this.m_controllerList = controller.m_next;
      --this.m_controllerCount;
   }
   b2World.prototype.SetWarmStarting = function (flag) {
      b2World.m_warmStarting = flag;
   }
   b2World.prototype.SetContinuousPhysics = function (flag) {
      b2World.m_continuousPhysics = flag;
   }
   b2World.prototype.GetBodyCount = function () {
      return this.m_bodyCount;
   }
   b2World.prototype.GetJointCount = function () {
      return this.m_jointCount;
   }
   b2World.prototype.GetContactCount = function () {
      return this.m_contactCount;
   }
   b2World.prototype.SetGravity = function (gravity) {
      this.m_gravity = gravity;
   }
   b2World.prototype.GetGravity = function () {
      return this.m_gravity;
   }
   b2World.prototype.GetGroundBody = function () {
      return this.m_groundBody;
   }
   b2World.prototype.Step = function (dt, velocityIterations, positionIterations) {
      if (dt === undefined) dt = 0;
      if (velocityIterations === undefined) velocityIterations = 0;
      if (positionIterations === undefined) positionIterations = 0;
      if (this.m_flags & b2World.e_newFixture) {
         this.m_contactManager.FindNewContacts();
         this.m_flags &= ~b2World.e_newFixture;
      }
      this.m_flags |= b2World.e_locked;
      var step = b2World.s_timestep2;
      step.dt = dt;
      step.velocityIterations = velocityIterations;
      step.positionIterations = positionIterations;
      if (dt > 0.0) {
         step.inv_dt = 1.0 / dt;
      }
      else {
         step.inv_dt = 0.0;
      }
      step.dtRatio = this.m_inv_dt0 * dt;
      step.warmStarting = b2World.m_warmStarting;
      this.m_contactManager.Collide();
      if (step.dt > 0.0) {
         this.Solve(step);
      }
      if (b2World.m_continuousPhysics && step.dt > 0.0) {
         this.SolveTOI(step);
      }
      if (step.dt > 0.0) {
         this.m_inv_dt0 = step.inv_dt;
      }
      this.m_flags &= ~b2World.e_locked;
   }
   b2World.prototype.ClearForces = function () {
      for (var body = this.m_bodyList; body; body = body.m_next) {
         body.m_force.SetZero();
         body.m_torque = 0.0;
      }
   }
   b2World.prototype.DrawDebugData = function () {
      if (this.m_debugDraw == null) {
         return;
      }
      this.m_debugDraw.m_sprite.graphics.clear();
      var flags = this.m_debugDraw.GetFlags();
      var i = 0;
      var b;
      var f;
      var s;
      var j;
      var bp;
      var invQ = new b2Vec2;
      var x1 = new b2Vec2;
      var x2 = new b2Vec2;
      var xf;
      var b1 = new b2AABB();
      var b2 = new b2AABB();
      var vs = [new b2Vec2(), new b2Vec2(), new b2Vec2(), new b2Vec2()];
      var color = new b2Color(0, 0, 0);
      if (flags & b2DebugDraw.e_shapeBit) {
         for (b = this.m_bodyList;
         b; b = b.m_next) {
            xf = b.m_xf;
            for (f = b.GetFixtureList();
            f; f = f.m_next) {
               s = f.GetShape();
               if (b.IsActive() == false) {
                  color.Set(0.5, 0.5, 0.3);
                  this.DrawShape(s, xf, color);
               }
               else if (b.GetType() == b2Body.b2_staticBody) {
                  color.Set(0.5, 0.9, 0.5);
                  this.DrawShape(s, xf, color);
               }
               else if (b.GetType() == b2Body.b2_kinematicBody) {
                  color.Set(0.5, 0.5, 0.9);
                  this.DrawShape(s, xf, color);
               }
               else if (b.IsAwake() == false) {
                  color.Set(0.6, 0.6, 0.6);
                  this.DrawShape(s, xf, color);
               }
               else {
                  color.Set(0.9, 0.7, 0.7);
                  this.DrawShape(s, xf, color);
               }
            }
         }
      }
      if (flags & b2DebugDraw.e_jointBit) {
         for (j = this.m_jointList;
         j; j = j.m_next) {
            this.DrawJoint(j);
         }
      }
      if (flags & b2DebugDraw.e_controllerBit) {
         for (var c = this.m_controllerList; c; c = c.m_next) {
            c.Draw(this.m_debugDraw);
         }
      }
      if (flags & b2DebugDraw.e_pairBit) {
         color.Set(0.3, 0.9, 0.9);
         for (var contact = this.m_contactManager.m_contactList; contact; contact = contact.GetNext()) {
            var fixtureA = contact.GetFixtureA();
            var fixtureB = contact.GetFixtureB();
            var cA = fixtureA.GetAABB().GetCenter();
            var cB = fixtureB.GetAABB().GetCenter();
            this.m_debugDraw.DrawSegment(cA, cB, color);
         }
      }
      if (flags & b2DebugDraw.e_aabbBit) {
         bp = this.m_contactManager.m_broadPhase;
         vs = [new b2Vec2(), new b2Vec2(), new b2Vec2(), new b2Vec2()];
         for (b = this.m_bodyList;
         b; b = b.GetNext()) {
            if (b.IsActive() == false) {
               continue;
            }
            for (f = b.GetFixtureList();
            f; f = f.GetNext()) {
               var aabb = bp.GetFatAABB(f.m_proxy);
               vs[0].Set(aabb.lowerBound.x, aabb.lowerBound.y);
               vs[1].Set(aabb.upperBound.x, aabb.lowerBound.y);
               vs[2].Set(aabb.upperBound.x, aabb.upperBound.y);
               vs[3].Set(aabb.lowerBound.x, aabb.upperBound.y);
               this.m_debugDraw.DrawPolygon(vs, 4, color);
            }
         }
      }
      if (flags & b2DebugDraw.e_centerOfMassBit) {
         for (b = this.m_bodyList;
         b; b = b.m_next) {
            xf = b2World.s_xf;
            xf.R = b.m_xf.R;
            xf.position = b.GetWorldCenter();
            this.m_debugDraw.DrawTransform(xf);
         }
      }
   }
   b2World.prototype.QueryAABB = function (callback, aabb) {
      var __this = this;
      var broadPhase = __this.m_contactManager.m_broadPhase;

      function WorldQueryWrapper(proxy) {
         return callback(broadPhase.GetUserData(proxy));
      };
      broadPhase.Query(WorldQueryWrapper, aabb);
   }
   b2World.prototype.QueryShape = function (callback, shape, transform) {
      var __this = this;
      if (transform === undefined) transform = null;
      if (transform == null) {
         transform = new b2Transform();
         transform.SetIdentity();
      }
      var broadPhase = __this.m_contactManager.m_broadPhase;

      function WorldQueryWrapper(proxy) {
         var fixture = (broadPhase.GetUserData(proxy) instanceof b2Fixture ? broadPhase.GetUserData(proxy) : null);
         if (b2Shape.TestOverlap(shape, transform, fixture.GetShape(), fixture.GetBody().GetTransform())) return callback(fixture);
         return true;
      };
      var aabb = new b2AABB();
      shape.ComputeAABB(aabb, transform);
      broadPhase.Query(WorldQueryWrapper, aabb);
   }
   b2World.prototype.QueryPoint = function (callback, p) {
      var __this = this;
      var broadPhase = __this.m_contactManager.m_broadPhase;

      function WorldQueryWrapper(proxy) {
         var fixture = (broadPhase.GetUserData(proxy) instanceof b2Fixture ? broadPhase.GetUserData(proxy) : null);
         if (fixture.TestPoint(p)) return callback(fixture);
         return true;
      };
      var aabb = new b2AABB();
      aabb.lowerBound.Set(p.x - b2Settings.b2_linearSlop, p.y - b2Settings.b2_linearSlop);
      aabb.upperBound.Set(p.x + b2Settings.b2_linearSlop, p.y + b2Settings.b2_linearSlop);
      broadPhase.Query(WorldQueryWrapper, aabb);
   }
   b2World.prototype.RayCast = function (callback, point1, point2) {
      var __this = this;
      var broadPhase = __this.m_contactManager.m_broadPhase;
      var output = new b2RayCastOutput;

      function RayCastWrapper(input, proxy) {
         var userData = broadPhase.GetUserData(proxy);
         var fixture = (userData instanceof b2Fixture ? userData : null);
         var hit = fixture.RayCast(output, input);
         if (hit) {
            var fraction = output.fraction;
            var point = new b2Vec2((1.0 - fraction) * point1.x + fraction * point2.x, (1.0 - fraction) * point1.y + fraction * point2.y);
            return callback(fixture, point, output.normal, fraction);
         }
         return input.maxFraction;
      };
      var input = new b2RayCastInput(point1, point2);
      broadPhase.RayCast(RayCastWrapper, input);
   }
   b2World.prototype.RayCastOne = function (point1, point2) {
      var __this = this;
      var result;

      function RayCastOneWrapper(fixture, point, normal, fraction) {
         if (fraction === undefined) fraction = 0;
         result = fixture;
         return fraction;
      };
      __this.RayCast(RayCastOneWrapper, point1, point2);
      return result;
   }
   b2World.prototype.RayCastAll = function (point1, point2) {
      var __this = this;
      var result = new Vector();

      function RayCastAllWrapper(fixture, point, normal, fraction) {
         if (fraction === undefined) fraction = 0;
         result[result.length] = fixture;
         return 1;
      };
      __this.RayCast(RayCastAllWrapper, point1, point2);
      return result;
   }
   b2World.prototype.GetBodyList = function () {
      return this.m_bodyList;
   }
   b2World.prototype.GetJointList = function () {
      return this.m_jointList;
   }
   b2World.prototype.GetContactList = function () {
      return this.m_contactList;
   }
   b2World.prototype.IsLocked = function () {
      return (this.m_flags & b2World.e_locked) > 0;
   }
   b2World.prototype.Solve = function (step) {
      var b;
      for (var controller = this.m_controllerList; controller; controller = controller.m_next) {
         controller.Step(step);
      }
      var island = this.m_island;
      island.Initialize(this.m_bodyCount, this.m_contactCount, this.m_jointCount, null, this.m_contactManager.m_contactListener, this.m_contactSolver);
      for (b = this.m_bodyList;
      b; b = b.m_next) {
         b.m_flags &= ~b2Body.e_islandFlag;
      }
      for (var c = this.m_contactList; c; c = c.m_next) {
         c.m_flags &= ~b2Contact.e_islandFlag;
      }
      for (var j = this.m_jointList; j; j = j.m_next) {
         j.m_islandFlag = false;
      }
      var stackSize = parseInt(this.m_bodyCount);
      var stack = this.s_stack;
      for (var seed = this.m_bodyList; seed; seed = seed.m_next) {
         if (seed.m_flags & b2Body.e_islandFlag) {
            continue;
         }
         if (seed.IsAwake() == false || seed.IsActive() == false) {
            continue;
         }
         if (seed.GetType() == b2Body.b2_staticBody) {
            continue;
         }
         island.Clear();
         var stackCount = 0;
         stack[stackCount++] = seed;
         seed.m_flags |= b2Body.e_islandFlag;
         while (stackCount > 0) {
            b = stack[--stackCount];
            island.AddBody(b);
            if (b.IsAwake() == false) {
               b.SetAwake(true);
            }
            if (b.GetType() == b2Body.b2_staticBody) {
               continue;
            }
            var other;
            for (var ce = b.m_contactList; ce; ce = ce.next) {
               if (ce.contact.m_flags & b2Contact.e_islandFlag) {
                  continue;
               }
               if (ce.contact.IsSensor() == true || ce.contact.IsEnabled() == false || ce.contact.IsTouching() == false) {
                  continue;
               }
               island.AddContact(ce.contact);
               ce.contact.m_flags |= b2Contact.e_islandFlag;
               other = ce.other;
               if (other.m_flags & b2Body.e_islandFlag) {
                  continue;
               }
               stack[stackCount++] = other;
               other.m_flags |= b2Body.e_islandFlag;
            }
            for (var jn = b.m_jointList; jn; jn = jn.next) {
               if (jn.joint.m_islandFlag == true) {
                  continue;
               }
               other = jn.other;
               if (other.IsActive() == false) {
                  continue;
               }
               island.AddJoint(jn.joint);
               jn.joint.m_islandFlag = true;
               if (other.m_flags & b2Body.e_islandFlag) {
                  continue;
               }
               stack[stackCount++] = other;
               other.m_flags |= b2Body.e_islandFlag;
            }
         }
         island.Solve(step, this.m_gravity, this.m_allowSleep);
         for (var i = 0; i < island.m_bodyCount; ++i) {
            b = island.m_bodies[i];
            if (b.GetType() == b2Body.b2_staticBody) {
               b.m_flags &= ~b2Body.e_islandFlag;
            }
         }
      }
      for (i = 0;
      i < stack.length; ++i) {
         if (!stack[i]) break;
         stack[i] = null;
      }
      for (b = this.m_bodyList;
      b; b = b.m_next) {
         if (b.IsAwake() == false || b.IsActive() == false) {
            continue;
         }
         if (b.GetType() == b2Body.b2_staticBody) {
            continue;
         }
         b.SynchronizeFixtures();
      }
      this.m_contactManager.FindNewContacts();
   }
   b2World.prototype.SolveTOI = function (step) {
      var b;
      var fA;
      var fB;
      var bA;
      var bB;
      var cEdge;
      var j;
      var island = this.m_island;
      island.Initialize(this.m_bodyCount, b2Settings.b2_maxTOIContactsPerIsland, b2Settings.b2_maxTOIJointsPerIsland, null, this.m_contactManager.m_contactListener, this.m_contactSolver);
      var queue = b2World.s_queue;
      for (b = this.m_bodyList;
      b; b = b.m_next) {
         b.m_flags &= ~b2Body.e_islandFlag;
         b.m_sweep.t0 = 0.0;
      }
      var c;
      for (c = this.m_contactList;
      c; c = c.m_next) {
         c.m_flags &= ~ (b2Contact.e_toiFlag | b2Contact.e_islandFlag);
      }
      for (j = this.m_jointList;
      j; j = j.m_next) {
         j.m_islandFlag = false;
      }
      for (;;) {
         var minContact = null;
         var minTOI = 1.0;
         for (c = this.m_contactList;
         c; c = c.m_next) {
            if (c.IsSensor() == true || c.IsEnabled() == false || c.IsContinuous() == false) {
               continue;
            }
            var toi = 1.0;
            if (c.m_flags & b2Contact.e_toiFlag) {
               toi = c.m_toi;
            }
            else {
               fA = c.m_fixtureA;
               fB = c.m_fixtureB;
               bA = fA.m_body;
               bB = fB.m_body;
               if ((bA.GetType() != b2Body.b2_dynamicBody || bA.IsAwake() == false) && (bB.GetType() != b2Body.b2_dynamicBody || bB.IsAwake() == false)) {
                  continue;
               }
               var t0 = bA.m_sweep.t0;
               if (bA.m_sweep.t0 < bB.m_sweep.t0) {
                  t0 = bB.m_sweep.t0;
                  bA.m_sweep.Advance(t0);
               }
               else if (bB.m_sweep.t0 < bA.m_sweep.t0) {
                  t0 = bA.m_sweep.t0;
                  bB.m_sweep.Advance(t0);
               }
               toi = c.ComputeTOI(bA.m_sweep, bB.m_sweep);
               b2Settings.b2Assert(0.0 <= toi && toi <= 1.0);
               if (toi > 0.0 && toi < 1.0) {
                  toi = (1.0 - toi) * t0 + toi;
                  if (toi > 1) toi = 1;
               }
               c.m_toi = toi;
               c.m_flags |= b2Contact.e_toiFlag;
            }
            if (Number.MIN_VALUE < toi && toi < minTOI) {
               minContact = c;
               minTOI = toi;
            }
         }
         if (minContact == null || 1.0 - 100.0 * Number.MIN_VALUE < minTOI) {
            break;
         }
         fA = minContact.m_fixtureA;
         fB = minContact.m_fixtureB;
         bA = fA.m_body;
         bB = fB.m_body;
         b2World.s_backupA.Set(bA.m_sweep);
         b2World.s_backupB.Set(bB.m_sweep);
         bA.Advance(minTOI);
         bB.Advance(minTOI);
         minContact.Update(this.m_contactManager.m_contactListener);
         minContact.m_flags &= ~b2Contact.e_toiFlag;
         if (minContact.IsSensor() == true || minContact.IsEnabled() == false) {
            bA.m_sweep.Set(b2World.s_backupA);
            bB.m_sweep.Set(b2World.s_backupB);
            bA.SynchronizeTransform();
            bB.SynchronizeTransform();
            continue;
         }
         if (minContact.IsTouching() == false) {
            continue;
         }
         var seed = bA;
         if (seed.GetType() != b2Body.b2_dynamicBody) {
            seed = bB;
         }
         island.Clear();
         var queueStart = 0;
         var queueSize = 0;
         queue[queueStart + queueSize++] = seed;
         seed.m_flags |= b2Body.e_islandFlag;
         while (queueSize > 0) {
            b = queue[queueStart++];
            --queueSize;
            island.AddBody(b);
            if (b.IsAwake() == false) {
               b.SetAwake(true);
            }
            if (b.GetType() != b2Body.b2_dynamicBody) {
               continue;
            }
            for (cEdge = b.m_contactList;
            cEdge; cEdge = cEdge.next) {
               if (island.m_contactCount == island.m_contactCapacity) {
                  break;
               }
               if (cEdge.contact.m_flags & b2Contact.e_islandFlag) {
                  continue;
               }
               if (cEdge.contact.IsSensor() == true || cEdge.contact.IsEnabled() == false || cEdge.contact.IsTouching() == false) {
                  continue;
               }
               island.AddContact(cEdge.contact);
               cEdge.contact.m_flags |= b2Contact.e_islandFlag;
               var other = cEdge.other;
               if (other.m_flags & b2Body.e_islandFlag) {
                  continue;
               }
               if (other.GetType() != b2Body.b2_staticBody) {
                  other.Advance(minTOI);
                  other.SetAwake(true);
               }
               queue[queueStart + queueSize] = other;
               ++queueSize;
               other.m_flags |= b2Body.e_islandFlag;
            }
            for (var jEdge = b.m_jointList; jEdge; jEdge = jEdge.next) {
               if (island.m_jointCount == island.m_jointCapacity) continue;
               if (jEdge.joint.m_islandFlag == true) continue;
               other = jEdge.other;
               if (other.IsActive() == false) {
                  continue;
               }
               island.AddJoint(jEdge.joint);
               jEdge.joint.m_islandFlag = true;
               if (other.m_flags & b2Body.e_islandFlag) continue;
               if (other.GetType() != b2Body.b2_staticBody) {
                  other.Advance(minTOI);
                  other.SetAwake(true);
               }
               queue[queueStart + queueSize] = other;
               ++queueSize;
               other.m_flags |= b2Body.e_islandFlag;
            }
         }
         var subStep = b2World.s_timestep;
         subStep.warmStarting = false;
         subStep.dt = (1.0 - minTOI) * step.dt;
         subStep.inv_dt = 1.0 / subStep.dt;
         subStep.dtRatio = 0.0;
         subStep.velocityIterations = step.velocityIterations;
         subStep.positionIterations = step.positionIterations;
         island.SolveTOI(subStep);
         var i = 0;
         for (i = 0;
         i < island.m_bodyCount; ++i) {
            b = island.m_bodies[i];
            b.m_flags &= ~b2Body.e_islandFlag;
            if (b.IsAwake() == false) {
               continue;
            }
            if (b.GetType() != b2Body.b2_dynamicBody) {
               continue;
            }
            b.SynchronizeFixtures();
            for (cEdge = b.m_contactList;
            cEdge; cEdge = cEdge.next) {
               cEdge.contact.m_flags &= ~b2Contact.e_toiFlag;
            }
         }
         for (i = 0;
         i < island.m_contactCount; ++i) {
            c = island.m_contacts[i];
            c.m_flags &= ~ (b2Contact.e_toiFlag | b2Contact.e_islandFlag);
         }
         for (i = 0;
         i < island.m_jointCount; ++i) {
            j = island.m_joints[i];
            j.m_islandFlag = false;
         }
         this.m_contactManager.FindNewContacts();
      }
   }
   b2World.prototype.DrawJoint = function (joint) {
      var b1 = joint.GetBodyA();
      var b2 = joint.GetBodyB();
      var xf1 = b1.m_xf;
      var xf2 = b2.m_xf;
      var x1 = xf1.position;
      var x2 = xf2.position;
      var p1 = joint.GetAnchorA();
      var p2 = joint.GetAnchorB();
      var color = b2World.s_jointColor;
      switch (joint.m_type) {
      case b2Joint.e_distanceJoint:
         this.m_debugDraw.DrawSegment(p1, p2, color);
         break;
      case b2Joint.e_pulleyJoint:
         {
            var pulley = ((joint instanceof b2PulleyJoint ? joint : null));
            var s1 = pulley.GetGroundAnchorA();
            var s2 = pulley.GetGroundAnchorB();
            this.m_debugDraw.DrawSegment(s1, p1, color);
            this.m_debugDraw.DrawSegment(s2, p2, color);
            this.m_debugDraw.DrawSegment(s1, s2, color);
         }
         break;
      case b2Joint.e_mouseJoint:
         this.m_debugDraw.DrawSegment(p1, p2, color);
         break;
      default:
         if (b1 != this.m_groundBody) this.m_debugDraw.DrawSegment(x1, p1, color);
         this.m_debugDraw.DrawSegment(p1, p2, color);
         if (b2 != this.m_groundBody) this.m_debugDraw.DrawSegment(x2, p2, color);
      }
   }
   b2World.prototype.DrawShape = function (shape, xf, color) {
      switch (shape.m_type) {
      case b2Shape.e_circleShape:
         {
            var circle = ((shape instanceof b2CircleShape ? shape : null));
            var center = b2Math.MulX(xf, circle.m_p);
            var radius = circle.m_radius;
            var axis = xf.R.col1;
            this.m_debugDraw.DrawSolidCircle(center, radius, axis, color);
         }
         break;
      case b2Shape.e_polygonShape:
         {
            var i = 0;
            var poly = ((shape instanceof b2PolygonShape ? shape : null));
            var vertexCount = parseInt(poly.GetVertexCount());
            var localVertices = poly.GetVertices();
            var vertices = new Vector(vertexCount);
            for (i = 0;
            i < vertexCount; ++i) {
               vertices[i] = b2Math.MulX(xf, localVertices[i]);
            }
            this.m_debugDraw.DrawSolidPolygon(vertices, vertexCount, color);
         }
         break;
      case b2Shape.e_edgeShape:
         {
            var edge = (shape instanceof b2EdgeShape ? shape : null);
            this.m_debugDraw.DrawSegment(b2Math.MulX(xf, edge.GetVertex1()), b2Math.MulX(xf, edge.GetVertex2()), color);
         }
         break;
      }
   }
   Box2D.postDefs.push(function () {
      Box2D.Dynamics.b2World.s_timestep2 = new b2TimeStep();
      Box2D.Dynamics.b2World.s_xf = new b2Transform();
      Box2D.Dynamics.b2World.s_backupA = new b2Sweep();
      Box2D.Dynamics.b2World.s_backupB = new b2Sweep();
      Box2D.Dynamics.b2World.s_timestep = new b2TimeStep();
      Box2D.Dynamics.b2World.s_queue = new Vector();
      Box2D.Dynamics.b2World.s_jointColor = new b2Color(0.5, 0.8, 0.8);
      Box2D.Dynamics.b2World.e_newFixture = 0x0001;
      Box2D.Dynamics.b2World.e_locked = 0x0002;
   });
})();
(function () {
   var b2CircleShape = Box2D.Collision.Shapes.b2CircleShape,
      b2EdgeChainDef = Box2D.Collision.Shapes.b2EdgeChainDef,
      b2EdgeShape = Box2D.Collision.Shapes.b2EdgeShape,
      b2MassData = Box2D.Collision.Shapes.b2MassData,
      b2PolygonShape = Box2D.Collision.Shapes.b2PolygonShape,
      b2Shape = Box2D.Collision.Shapes.b2Shape,
      b2CircleContact = Box2D.Dynamics.Contacts.b2CircleContact,
      b2Contact = Box2D.Dynamics.Contacts.b2Contact,
      b2ContactConstraint = Box2D.Dynamics.Contacts.b2ContactConstraint,
      b2ContactConstraintPoint = Box2D.Dynamics.Contacts.b2ContactConstraintPoint,
      b2ContactEdge = Box2D.Dynamics.Contacts.b2ContactEdge,
      b2ContactFactory = Box2D.Dynamics.Contacts.b2ContactFactory,
      b2ContactRegister = Box2D.Dynamics.Contacts.b2ContactRegister,
      b2ContactResult = Box2D.Dynamics.Contacts.b2ContactResult,
      b2ContactSolver = Box2D.Dynamics.Contacts.b2ContactSolver,
      b2EdgeAndCircleContact = Box2D.Dynamics.Contacts.b2EdgeAndCircleContact,
      b2NullContact = Box2D.Dynamics.Contacts.b2NullContact,
      b2PolyAndCircleContact = Box2D.Dynamics.Contacts.b2PolyAndCircleContact,
      b2PolyAndEdgeContact = Box2D.Dynamics.Contacts.b2PolyAndEdgeContact,
      b2PolygonContact = Box2D.Dynamics.Contacts.b2PolygonContact,
      b2PositionSolverManifold = Box2D.Dynamics.Contacts.b2PositionSolverManifold,
      b2Body = Box2D.Dynamics.b2Body,
      b2BodyDef = Box2D.Dynamics.b2BodyDef,
      b2ContactFilter = Box2D.Dynamics.b2ContactFilter,
      b2ContactImpulse = Box2D.Dynamics.b2ContactImpulse,
      b2ContactListener = Box2D.Dynamics.b2ContactListener,
      b2ContactManager = Box2D.Dynamics.b2ContactManager,
      b2DebugDraw = Box2D.Dynamics.b2DebugDraw,
      b2DestructionListener = Box2D.Dynamics.b2DestructionListener,
      b2FilterData = Box2D.Dynamics.b2FilterData,
      b2Fixture = Box2D.Dynamics.b2Fixture,
      b2FixtureDef = Box2D.Dynamics.b2FixtureDef,
      b2Island = Box2D.Dynamics.b2Island,
      b2TimeStep = Box2D.Dynamics.b2TimeStep,
      b2World = Box2D.Dynamics.b2World,
      b2Color = Box2D.Common.b2Color,
      b2internal = Box2D.Common.b2internal,
      b2Settings = Box2D.Common.b2Settings,
      b2Mat22 = Box2D.Common.Math.b2Mat22,
      b2Mat33 = Box2D.Common.Math.b2Mat33,
      b2Math = Box2D.Common.Math.b2Math,
      b2Sweep = Box2D.Common.Math.b2Sweep,
      b2Transform = Box2D.Common.Math.b2Transform,
      b2Vec2 = Box2D.Common.Math.b2Vec2,
      b2Vec3 = Box2D.Common.Math.b2Vec3,
      b2AABB = Box2D.Collision.b2AABB,
      b2Bound = Box2D.Collision.b2Bound,
      b2BoundValues = Box2D.Collision.b2BoundValues,
      b2Collision = Box2D.Collision.b2Collision,
      b2ContactID = Box2D.Collision.b2ContactID,
      b2ContactPoint = Box2D.Collision.b2ContactPoint,
      b2Distance = Box2D.Collision.b2Distance,
      b2DistanceInput = Box2D.Collision.b2DistanceInput,
      b2DistanceOutput = Box2D.Collision.b2DistanceOutput,
      b2DistanceProxy = Box2D.Collision.b2DistanceProxy,
      b2DynamicTree = Box2D.Collision.b2DynamicTree,
      b2DynamicTreeBroadPhase = Box2D.Collision.b2DynamicTreeBroadPhase,
      b2DynamicTreeNode = Box2D.Collision.b2DynamicTreeNode,
      b2DynamicTreePair = Box2D.Collision.b2DynamicTreePair,
      b2Manifold = Box2D.Collision.b2Manifold,
      b2ManifoldPoint = Box2D.Collision.b2ManifoldPoint,
      b2Point = Box2D.Collision.b2Point,
      b2RayCastInput = Box2D.Collision.b2RayCastInput,
      b2RayCastOutput = Box2D.Collision.b2RayCastOutput,
      b2Segment = Box2D.Collision.b2Segment,
      b2SeparationFunction = Box2D.Collision.b2SeparationFunction,
      b2Simplex = Box2D.Collision.b2Simplex,
      b2SimplexCache = Box2D.Collision.b2SimplexCache,
      b2SimplexVertex = Box2D.Collision.b2SimplexVertex,
      b2TimeOfImpact = Box2D.Collision.b2TimeOfImpact,
      b2TOIInput = Box2D.Collision.b2TOIInput,
      b2WorldManifold = Box2D.Collision.b2WorldManifold,
      ClipVertex = Box2D.Collision.ClipVertex,
      Features = Box2D.Collision.Features,
      IBroadPhase = Box2D.Collision.IBroadPhase;

   Box2D.inherit(b2CircleContact, Box2D.Dynamics.Contacts.b2Contact);
   b2CircleContact.prototype.__super = Box2D.Dynamics.Contacts.b2Contact.prototype;
   b2CircleContact.b2CircleContact = function () {
      Box2D.Dynamics.Contacts.b2Contact.b2Contact.apply(this, arguments);
   };
   b2CircleContact.Create = function (allocator) {
      return new b2CircleContact();
   }
   b2CircleContact.Destroy = function (contact, allocator) {}
   b2CircleContact.prototype.Reset = function (fixtureA, fixtureB) {
      this.__super.Reset.call(this, fixtureA, fixtureB);
   }
   b2CircleContact.prototype.Evaluate = function () {
      var bA = this.m_fixtureA.GetBody();
      var bB = this.m_fixtureB.GetBody();
      b2Collision.CollideCircles(this.m_manifold, (this.m_fixtureA.GetShape() instanceof b2CircleShape ? this.m_fixtureA.GetShape() : null), bA.m_xf, (this.m_fixtureB.GetShape() instanceof b2CircleShape ? this.m_fixtureB.GetShape() : null), bB.m_xf);
   }
   b2Contact.b2Contact = function () {
      this.m_nodeA = new b2ContactEdge();
      this.m_nodeB = new b2ContactEdge();
      this.m_manifold = new b2Manifold();
      this.m_oldManifold = new b2Manifold();
   };
   b2Contact.prototype.GetManifold = function () {
      return this.m_manifold;
   }
   b2Contact.prototype.GetWorldManifold = function (worldManifold) {
      var bodyA = this.m_fixtureA.GetBody();
      var bodyB = this.m_fixtureB.GetBody();
      var shapeA = this.m_fixtureA.GetShape();
      var shapeB = this.m_fixtureB.GetShape();
      worldManifold.Initialize(this.m_manifold, bodyA.GetTransform(), shapeA.m_radius, bodyB.GetTransform(), shapeB.m_radius);
   }
   b2Contact.prototype.IsTouching = function () {
      return (this.m_flags & b2Contact.e_touchingFlag) == b2Contact.e_touchingFlag;
   }
   b2Contact.prototype.IsContinuous = function () {
      return (this.m_flags & b2Contact.e_continuousFlag) == b2Contact.e_continuousFlag;
   }
   b2Contact.prototype.SetSensor = function (sensor) {
      if (sensor) {
         this.m_flags |= b2Contact.e_sensorFlag;
      }
      else {
         this.m_flags &= ~b2Contact.e_sensorFlag;
      }
   }
   b2Contact.prototype.IsSensor = function () {
      return (this.m_flags & b2Contact.e_sensorFlag) == b2Contact.e_sensorFlag;
   }
   b2Contact.prototype.SetEnabled = function (flag) {
      if (flag) {
         this.m_flags |= b2Contact.e_enabledFlag;
      }
      else {
         this.m_flags &= ~b2Contact.e_enabledFlag;
      }
   }
   b2Contact.prototype.IsEnabled = function () {
      return (this.m_flags & b2Contact.e_enabledFlag) == b2Contact.e_enabledFlag;
   }
   b2Contact.prototype.GetNext = function () {
      return this.m_next;
   }
   b2Contact.prototype.GetFixtureA = function () {
      return this.m_fixtureA;
   }
   b2Contact.prototype.GetFixtureB = function () {
      return this.m_fixtureB;
   }
   b2Contact.prototype.FlagForFiltering = function () {
      this.m_flags |= b2Contact.e_filterFlag;
   }
   b2Contact.prototype.b2Contact = function () {}
   b2Contact.prototype.Reset = function (fixtureA, fixtureB) {
      if (fixtureA === undefined) fixtureA = null;
      if (fixtureB === undefined) fixtureB = null;
      this.m_flags = b2Contact.e_enabledFlag;
      if (!fixtureA || !fixtureB) {
         this.m_fixtureA = null;
         this.m_fixtureB = null;
         return;
      }
      if (fixtureA.IsSensor() || fixtureB.IsSensor()) {
         this.m_flags |= b2Contact.e_sensorFlag;
      }
      var bodyA = fixtureA.GetBody();
      var bodyB = fixtureB.GetBody();
      if (bodyA.GetType() != b2Body.b2_dynamicBody || bodyA.IsBullet() || bodyB.GetType() != b2Body.b2_dynamicBody || bodyB.IsBullet()) {
         this.m_flags |= b2Contact.e_continuousFlag;
      }
      this.m_fixtureA = fixtureA;
      this.m_fixtureB = fixtureB;
      this.m_manifold.m_pointCount = 0;
      this.m_prev = null;
      this.m_next = null;
      this.m_nodeA.contact = null;
      this.m_nodeA.prev = null;
      this.m_nodeA.next = null;
      this.m_nodeA.other = null;
      this.m_nodeB.contact = null;
      this.m_nodeB.prev = null;
      this.m_nodeB.next = null;
      this.m_nodeB.other = null;
   }
   b2Contact.prototype.Update = function (listener) {
      var tManifold = this.m_oldManifold;
      this.m_oldManifold = this.m_manifold;
      this.m_manifold = tManifold;
      this.m_flags |= b2Contact.e_enabledFlag;
      var touching = false;
      var wasTouching = (this.m_flags & b2Contact.e_touchingFlag) == b2Contact.e_touchingFlag;
      var bodyA = this.m_fixtureA.m_body;
      var bodyB = this.m_fixtureB.m_body;
      var aabbOverlap = this.m_fixtureA.m_aabb.TestOverlap(this.m_fixtureB.m_aabb);
      if (this.m_flags & b2Contact.e_sensorFlag) {
         if (aabbOverlap) {
            var shapeA = this.m_fixtureA.GetShape();
            var shapeB = this.m_fixtureB.GetShape();
            var xfA = bodyA.GetTransform();
            var xfB = bodyB.GetTransform();
            touching = b2Shape.TestOverlap(shapeA, xfA, shapeB, xfB);
         }
         this.m_manifold.m_pointCount = 0;
      }
      else {
         if (bodyA.GetType() != b2Body.b2_dynamicBody || bodyA.IsBullet() || bodyB.GetType() != b2Body.b2_dynamicBody || bodyB.IsBullet()) {
            this.m_flags |= b2Contact.e_continuousFlag;
         }
         else {
            this.m_flags &= ~b2Contact.e_continuousFlag;
         }
         if (aabbOverlap) {
            this.Evaluate();
            touching = this.m_manifold.m_pointCount > 0;
            for (var i = 0; i < this.m_manifold.m_pointCount; ++i) {
               var mp2 = this.m_manifold.m_points[i];
               mp2.m_normalImpulse = 0.0;
               mp2.m_tangentImpulse = 0.0;
               var id2 = mp2.m_id;
               for (var j = 0; j < this.m_oldManifold.m_pointCount; ++j) {
                  var mp1 = this.m_oldManifold.m_points[j];
                  if (mp1.m_id.key == id2.key) {
                     mp2.m_normalImpulse = mp1.m_normalImpulse;
                     mp2.m_tangentImpulse = mp1.m_tangentImpulse;
                     break;
                  }
               }
            }
         }
         else {
            this.m_manifold.m_pointCount = 0;
         }
         if (touching != wasTouching) {
            bodyA.SetAwake(true);
            bodyB.SetAwake(true);
         }
      }
      if (touching) {
         this.m_flags |= b2Contact.e_touchingFlag;
      }
      else {
         this.m_flags &= ~b2Contact.e_touchingFlag;
      }
      if (wasTouching == false && touching == true) {
         listener.BeginContact(this);
      }
      if (wasTouching == true && touching == false) {
         listener.EndContact(this);
      }
      if ((this.m_flags & b2Contact.e_sensorFlag) == 0) {
         listener.PreSolve(this, this.m_oldManifold);
      }
   }
   b2Contact.prototype.Evaluate = function () {}
   b2Contact.prototype.ComputeTOI = function (sweepA, sweepB) {
      b2Contact.s_input.proxyA.Set(this.m_fixtureA.GetShape());
      b2Contact.s_input.proxyB.Set(this.m_fixtureB.GetShape());
      b2Contact.s_input.sweepA = sweepA;
      b2Contact.s_input.sweepB = sweepB;
      b2Contact.s_input.tolerance = b2Settings.b2_linearSlop;
      return b2TimeOfImpact.TimeOfImpact(b2Contact.s_input);
   }
   Box2D.postDefs.push(function () {
      Box2D.Dynamics.Contacts.b2Contact.e_sensorFlag = 0x0001;
      Box2D.Dynamics.Contacts.b2Contact.e_continuousFlag = 0x0002;
      Box2D.Dynamics.Contacts.b2Contact.e_islandFlag = 0x0004;
      Box2D.Dynamics.Contacts.b2Contact.e_toiFlag = 0x0008;
      Box2D.Dynamics.Contacts.b2Contact.e_touchingFlag = 0x0010;
      Box2D.Dynamics.Contacts.b2Contact.e_enabledFlag = 0x0020;
      Box2D.Dynamics.Contacts.b2Contact.e_filterFlag = 0x0040;
      Box2D.Dynamics.Contacts.b2Contact.s_input = new b2TOIInput();
   });
   b2ContactConstraint.b2ContactConstraint = function () {
      this.localPlaneNormal = new b2Vec2();
      this.localPoint = new b2Vec2();
      this.normal = new b2Vec2();
      this.normalMass = new b2Mat22();
      this.K = new b2Mat22();
   };
   b2ContactConstraint.prototype.b2ContactConstraint = function () {
      this.points = new Vector(b2Settings.b2_maxManifoldPoints);
      for (var i = 0; i < b2Settings.b2_maxManifoldPoints; i++) {
         this.points[i] = new b2ContactConstraintPoint();
      }
   }
   b2ContactConstraintPoint.b2ContactConstraintPoint = function () {
      this.localPoint = new b2Vec2();
      this.rA = new b2Vec2();
      this.rB = new b2Vec2();
   };
   b2ContactEdge.b2ContactEdge = function () {};
   b2ContactFactory.b2ContactFactory = function () {};
   b2ContactFactory.prototype.b2ContactFactory = function (allocator) {
      this.m_allocator = allocator;
      this.InitializeRegisters();
   }
   b2ContactFactory.prototype.AddType = function (createFcn, destroyFcn, type1, type2) {
      if (type1 === undefined) type1 = 0;
      if (type2 === undefined) type2 = 0;
      this.m_registers[type1][type2].createFcn = createFcn;
      this.m_registers[type1][type2].destroyFcn = destroyFcn;
      this.m_registers[type1][type2].primary = true;
      if (type1 != type2) {
         this.m_registers[type2][type1].createFcn = createFcn;
         this.m_registers[type2][type1].destroyFcn = destroyFcn;
         this.m_registers[type2][type1].primary = false;
      }
   }
   b2ContactFactory.prototype.InitializeRegisters = function () {
      this.m_registers = new Vector(b2Shape.e_shapeTypeCount);
      for (var i = 0; i < b2Shape.e_shapeTypeCount; i++) {
         this.m_registers[i] = new Vector(b2Shape.e_shapeTypeCount);
         for (var j = 0; j < b2Shape.e_shapeTypeCount; j++) {
            this.m_registers[i][j] = new b2ContactRegister();
         }
      }
      this.AddType(b2CircleContact.Create, b2CircleContact.Destroy, b2Shape.e_circleShape, b2Shape.e_circleShape);
      this.AddType(b2PolyAndCircleContact.Create, b2PolyAndCircleContact.Destroy, b2Shape.e_polygonShape, b2Shape.e_circleShape);
      this.AddType(b2PolygonContact.Create, b2PolygonContact.Destroy, b2Shape.e_polygonShape, b2Shape.e_polygonShape);
      this.AddType(b2EdgeAndCircleContact.Create, b2EdgeAndCircleContact.Destroy, b2Shape.e_edgeShape, b2Shape.e_circleShape);
      this.AddType(b2PolyAndEdgeContact.Create, b2PolyAndEdgeContact.Destroy, b2Shape.e_polygonShape, b2Shape.e_edgeShape);
   }
   b2ContactFactory.prototype.Create = function (fixtureA, fixtureB) {
      var type1 = parseInt(fixtureA.GetType());
      var type2 = parseInt(fixtureB.GetType());
      var reg = this.m_registers[type1][type2];
      var c;
      if (reg.pool) {
         c = reg.pool;
         reg.pool = c.m_next;
         reg.poolCount--;
         c.Reset(fixtureA, fixtureB);
         return c;
      }
      var createFcn = reg.createFcn;
      if (createFcn != null) {
         if (reg.primary) {
            c = createFcn(this.m_allocator);
            c.Reset(fixtureA, fixtureB);
            return c;
         }
         else {
            c = createFcn(this.m_allocator);
            c.Reset(fixtureB, fixtureA);
            return c;
         }
      }
      else {
         return null;
      }
   }
   b2ContactFactory.prototype.Destroy = function (contact) {
      if (contact.m_manifold.m_pointCount > 0) {
         contact.m_fixtureA.m_body.SetAwake(true);
         contact.m_fixtureB.m_body.SetAwake(true);
      }
      var type1 = parseInt(contact.m_fixtureA.GetType());
      var type2 = parseInt(contact.m_fixtureB.GetType());
      var reg = this.m_registers[type1][type2];
      if (true) {
         reg.poolCount++;
         contact.m_next = reg.pool;
         reg.pool = contact;
      }
      var destroyFcn = reg.destroyFcn;
      destroyFcn(contact, this.m_allocator);
   }
   b2ContactRegister.b2ContactRegister = function () {};
   b2ContactResult.b2ContactResult = function () {
      this.position = new b2Vec2();
      this.normal = new b2Vec2();
      this.id = new b2ContactID();
   };
   b2ContactSolver.b2ContactSolver = function () {
      this.m_step = new b2TimeStep();
      this.m_constraints = new Vector();
   };
   b2ContactSolver.prototype.b2ContactSolver = function () {}
   b2ContactSolver.prototype.Initialize = function (step, contacts, contactCount, allocator) {
      if (contactCount === undefined) contactCount = 0;
      var contact;
      this.m_step.Set(step);
      this.m_allocator = allocator;
      var i = 0;
      var tVec;
      var tMat;
      this.m_constraintCount = contactCount;
      while (this.m_constraints.length < this.m_constraintCount) {
         this.m_constraints[this.m_constraints.length] = new b2ContactConstraint();
      }
      for (i = 0;
      i < contactCount; ++i) {
         contact = contacts[i];
         var fixtureA = contact.m_fixtureA;
         var fixtureB = contact.m_fixtureB;
         var shapeA = fixtureA.m_shape;
         var shapeB = fixtureB.m_shape;
         var radiusA = shapeA.m_radius;
         var radiusB = shapeB.m_radius;
         var bodyA = fixtureA.m_body;
         var bodyB = fixtureB.m_body;
         var manifold = contact.GetManifold();
         var friction = b2Settings.b2MixFriction(fixtureA.GetFriction(), fixtureB.GetFriction());
         var restitution = b2Settings.b2MixRestitution(fixtureA.GetRestitution(), fixtureB.GetRestitution());
         var vAX = bodyA.m_linearVelocity.x;
         var vAY = bodyA.m_linearVelocity.y;
         var vBX = bodyB.m_linearVelocity.x;
         var vBY = bodyB.m_linearVelocity.y;
         var wA = bodyA.m_angularVelocity;
         var wB = bodyB.m_angularVelocity;
         b2Settings.b2Assert(manifold.m_pointCount > 0);
         b2ContactSolver.s_worldManifold.Initialize(manifold, bodyA.m_xf, radiusA, bodyB.m_xf, radiusB);
         var normalX = b2ContactSolver.s_worldManifold.m_normal.x;
         var normalY = b2ContactSolver.s_worldManifold.m_normal.y;
         var cc = this.m_constraints[i];
         cc.bodyA = bodyA;
         cc.bodyB = bodyB;
         cc.manifold = manifold;
         cc.normal.x = normalX;
         cc.normal.y = normalY;
         cc.pointCount = manifold.m_pointCount;
         cc.friction = friction;
         cc.restitution = restitution;
         cc.localPlaneNormal.x = manifold.m_localPlaneNormal.x;
         cc.localPlaneNormal.y = manifold.m_localPlaneNormal.y;
         cc.localPoint.x = manifold.m_localPoint.x;
         cc.localPoint.y = manifold.m_localPoint.y;
         cc.radius = radiusA + radiusB;
         cc.type = manifold.m_type;
         for (var k = 0; k < cc.pointCount; ++k) {
            var cp = manifold.m_points[k];
            var ccp = cc.points[k];
            ccp.normalImpulse = cp.m_normalImpulse;
            ccp.tangentImpulse = cp.m_tangentImpulse;
            ccp.localPoint.SetV(cp.m_localPoint);
            var rAX = ccp.rA.x = b2ContactSolver.s_worldManifold.m_points[k].x - bodyA.m_sweep.c.x;
            var rAY = ccp.rA.y = b2ContactSolver.s_worldManifold.m_points[k].y - bodyA.m_sweep.c.y;
            var rBX = ccp.rB.x = b2ContactSolver.s_worldManifold.m_points[k].x - bodyB.m_sweep.c.x;
            var rBY = ccp.rB.y = b2ContactSolver.s_worldManifold.m_points[k].y - bodyB.m_sweep.c.y;
            var rnA = rAX * normalY - rAY * normalX;
            var rnB = rBX * normalY - rBY * normalX;
            rnA *= rnA;
            rnB *= rnB;
            var kNormal = bodyA.m_invMass + bodyB.m_invMass + bodyA.m_invI * rnA + bodyB.m_invI * rnB;
            ccp.normalMass = 1.0 / kNormal;
            var kEqualized = bodyA.m_mass * bodyA.m_invMass + bodyB.m_mass * bodyB.m_invMass;
            kEqualized += bodyA.m_mass * bodyA.m_invI * rnA + bodyB.m_mass * bodyB.m_invI * rnB;
            ccp.equalizedMass = 1.0 / kEqualized;
            var tangentX = normalY;
            var tangentY = (-normalX);
            var rtA = rAX * tangentY - rAY * tangentX;
            var rtB = rBX * tangentY - rBY * tangentX;
            rtA *= rtA;
            rtB *= rtB;
            var kTangent = bodyA.m_invMass + bodyB.m_invMass + bodyA.m_invI * rtA + bodyB.m_invI * rtB;
            ccp.tangentMass = 1.0 / kTangent;
            ccp.velocityBias = 0.0;
            var tX = vBX + ((-wB * rBY)) - vAX - ((-wA * rAY));
            var tY = vBY + (wB * rBX) - vAY - (wA * rAX);
            var vRel = cc.normal.x * tX + cc.normal.y * tY;
            if (vRel < (-b2Settings.b2_velocityThreshold)) {
               ccp.velocityBias += (-cc.restitution * vRel);
            }
         }
         if (cc.pointCount == 2) {
            var ccp1 = cc.points[0];
            var ccp2 = cc.points[1];
            var invMassA = bodyA.m_invMass;
            var invIA = bodyA.m_invI;
            var invMassB = bodyB.m_invMass;
            var invIB = bodyB.m_invI;
            var rn1A = ccp1.rA.x * normalY - ccp1.rA.y * normalX;
            var rn1B = ccp1.rB.x * normalY - ccp1.rB.y * normalX;
            var rn2A = ccp2.rA.x * normalY - ccp2.rA.y * normalX;
            var rn2B = ccp2.rB.x * normalY - ccp2.rB.y * normalX;
            var k11 = invMassA + invMassB + invIA * rn1A * rn1A + invIB * rn1B * rn1B;
            var k22 = invMassA + invMassB + invIA * rn2A * rn2A + invIB * rn2B * rn2B;
            var k12 = invMassA + invMassB + invIA * rn1A * rn2A + invIB * rn1B * rn2B;
            var k_maxConditionNumber = 100.0;
            if (k11 * k11 < k_maxConditionNumber * (k11 * k22 - k12 * k12)) {
               cc.K.col1.Set(k11, k12);
               cc.K.col2.Set(k12, k22);
               cc.K.GetInverse(cc.normalMass);
            }
            else {
               cc.pointCount = 1;
            }
         }
      }
   }
   b2ContactSolver.prototype.InitVelocityConstraints = function (step) {
      var tVec;
      var tVec2;
      var tMat;
      for (var i = 0; i < this.m_constraintCount; ++i) {
         var c = this.m_constraints[i];
         var bodyA = c.bodyA;
         var bodyB = c.bodyB;
         var invMassA = bodyA.m_invMass;
         var invIA = bodyA.m_invI;
         var invMassB = bodyB.m_invMass;
         var invIB = bodyB.m_invI;
         var normalX = c.normal.x;
         var normalY = c.normal.y;
         var tangentX = normalY;
         var tangentY = (-normalX);
         var tX = 0;
         var j = 0;
         var tCount = 0;
         if (step.warmStarting) {
            tCount = c.pointCount;
            for (j = 0;
            j < tCount; ++j) {
               var ccp = c.points[j];
               ccp.normalImpulse *= step.dtRatio;
               ccp.tangentImpulse *= step.dtRatio;
               var PX = ccp.normalImpulse * normalX + ccp.tangentImpulse * tangentX;
               var PY = ccp.normalImpulse * normalY + ccp.tangentImpulse * tangentY;
               bodyA.m_angularVelocity -= invIA * (ccp.rA.x * PY - ccp.rA.y * PX);
               bodyA.m_linearVelocity.x -= invMassA * PX;
               bodyA.m_linearVelocity.y -= invMassA * PY;
               bodyB.m_angularVelocity += invIB * (ccp.rB.x * PY - ccp.rB.y * PX);
               bodyB.m_linearVelocity.x += invMassB * PX;
               bodyB.m_linearVelocity.y += invMassB * PY;
            }
         }
         else {
            tCount = c.pointCount;
            for (j = 0;
            j < tCount; ++j) {
               var ccp2 = c.points[j];
               ccp2.normalImpulse = 0.0;
               ccp2.tangentImpulse = 0.0;
            }
         }
      }
   }
   b2ContactSolver.prototype.SolveVelocityConstraints = function () {
      var j = 0;
      var ccp;
      var rAX = 0;
      var rAY = 0;
      var rBX = 0;
      var rBY = 0;
      var dvX = 0;
      var dvY = 0;
      var vn = 0;
      var vt = 0;
      var lambda = 0;
      var maxFriction = 0;
      var newImpulse = 0;
      var PX = 0;
      var PY = 0;
      var dX = 0;
      var dY = 0;
      var P1X = 0;
      var P1Y = 0;
      var P2X = 0;
      var P2Y = 0;
      var tMat;
      var tVec;
      for (var i = 0; i < this.m_constraintCount; ++i) {
         var c = this.m_constraints[i];
         var bodyA = c.bodyA;
         var bodyB = c.bodyB;
         var wA = bodyA.m_angularVelocity;
         var wB = bodyB.m_angularVelocity;
         var vA = bodyA.m_linearVelocity;
         var vB = bodyB.m_linearVelocity;
         var invMassA = bodyA.m_invMass;
         var invIA = bodyA.m_invI;
         var invMassB = bodyB.m_invMass;
         var invIB = bodyB.m_invI;
         var normalX = c.normal.x;
         var normalY = c.normal.y;
         var tangentX = normalY;
         var tangentY = (-normalX);
         var friction = c.friction;
         var tX = 0;
         for (j = 0;
         j < c.pointCount; j++) {
            ccp = c.points[j];
            dvX = vB.x - wB * ccp.rB.y - vA.x + wA * ccp.rA.y;
            dvY = vB.y + wB * ccp.rB.x - vA.y - wA * ccp.rA.x;
            vt = dvX * tangentX + dvY * tangentY;
            lambda = ccp.tangentMass * (-vt);
            maxFriction = friction * ccp.normalImpulse;
            newImpulse = b2Math.Clamp(ccp.tangentImpulse + lambda, (-maxFriction), maxFriction);
            lambda = newImpulse - ccp.tangentImpulse;
            PX = lambda * tangentX;
            PY = lambda * tangentY;
            vA.x -= invMassA * PX;
            vA.y -= invMassA * PY;
            wA -= invIA * (ccp.rA.x * PY - ccp.rA.y * PX);
            vB.x += invMassB * PX;
            vB.y += invMassB * PY;
            wB += invIB * (ccp.rB.x * PY - ccp.rB.y * PX);
            ccp.tangentImpulse = newImpulse;
         }
         var tCount = parseInt(c.pointCount);
         if (c.pointCount == 1) {
            ccp = c.points[0];
            dvX = vB.x + ((-wB * ccp.rB.y)) - vA.x - ((-wA * ccp.rA.y));
            dvY = vB.y + (wB * ccp.rB.x) - vA.y - (wA * ccp.rA.x);
            vn = dvX * normalX + dvY * normalY;
            lambda = (-ccp.normalMass * (vn - ccp.velocityBias));
            newImpulse = ccp.normalImpulse + lambda;
            newImpulse = newImpulse > 0 ? newImpulse : 0.0;
            lambda = newImpulse - ccp.normalImpulse;
            PX = lambda * normalX;
            PY = lambda * normalY;
            vA.x -= invMassA * PX;
            vA.y -= invMassA * PY;
            wA -= invIA * (ccp.rA.x * PY - ccp.rA.y * PX);
            vB.x += invMassB * PX;
            vB.y += invMassB * PY;
            wB += invIB * (ccp.rB.x * PY - ccp.rB.y * PX);
            ccp.normalImpulse = newImpulse;
         }
         else {
            var cp1 = c.points[0];
            var cp2 = c.points[1];
            var aX = cp1.normalImpulse;
            var aY = cp2.normalImpulse;
            var dv1X = vB.x - wB * cp1.rB.y - vA.x + wA * cp1.rA.y;
            var dv1Y = vB.y + wB * cp1.rB.x - vA.y - wA * cp1.rA.x;
            var dv2X = vB.x - wB * cp2.rB.y - vA.x + wA * cp2.rA.y;
            var dv2Y = vB.y + wB * cp2.rB.x - vA.y - wA * cp2.rA.x;
            var vn1 = dv1X * normalX + dv1Y * normalY;
            var vn2 = dv2X * normalX + dv2Y * normalY;
            var bX = vn1 - cp1.velocityBias;
            var bY = vn2 - cp2.velocityBias;
            tMat = c.K;
            bX -= tMat.col1.x * aX + tMat.col2.x * aY;
            bY -= tMat.col1.y * aX + tMat.col2.y * aY;
            var k_errorTol = 0.001;
            for (;;) {
               tMat = c.normalMass;
               var xX = (-(tMat.col1.x * bX + tMat.col2.x * bY));
               var xY = (-(tMat.col1.y * bX + tMat.col2.y * bY));
               if (xX >= 0.0 && xY >= 0.0) {
                  dX = xX - aX;
                  dY = xY - aY;
                  P1X = dX * normalX;
                  P1Y = dX * normalY;
                  P2X = dY * normalX;
                  P2Y = dY * normalY;
                  vA.x -= invMassA * (P1X + P2X);
                  vA.y -= invMassA * (P1Y + P2Y);
                  wA -= invIA * (cp1.rA.x * P1Y - cp1.rA.y * P1X + cp2.rA.x * P2Y - cp2.rA.y * P2X);
                  vB.x += invMassB * (P1X + P2X);
                  vB.y += invMassB * (P1Y + P2Y);
                  wB += invIB * (cp1.rB.x * P1Y - cp1.rB.y * P1X + cp2.rB.x * P2Y - cp2.rB.y * P2X);
                  cp1.normalImpulse = xX;
                  cp2.normalImpulse = xY;
                  break;
               }
               xX = (-cp1.normalMass * bX);
               xY = 0.0;
               vn1 = 0.0;
               vn2 = c.K.col1.y * xX + bY;
               if (xX >= 0.0 && vn2 >= 0.0) {
                  dX = xX - aX;
                  dY = xY - aY;
                  P1X = dX * normalX;
                  P1Y = dX * normalY;
                  P2X = dY * normalX;
                  P2Y = dY * normalY;
                  vA.x -= invMassA * (P1X + P2X);
                  vA.y -= invMassA * (P1Y + P2Y);
                  wA -= invIA * (cp1.rA.x * P1Y - cp1.rA.y * P1X + cp2.rA.x * P2Y - cp2.rA.y * P2X);
                  vB.x += invMassB * (P1X + P2X);
                  vB.y += invMassB * (P1Y + P2Y);
                  wB += invIB * (cp1.rB.x * P1Y - cp1.rB.y * P1X + cp2.rB.x * P2Y - cp2.rB.y * P2X);
                  cp1.normalImpulse = xX;
                  cp2.normalImpulse = xY;
                  break;
               }
               xX = 0.0;
               xY = (-cp2.normalMass * bY);
               vn1 = c.K.col2.x * xY + bX;
               vn2 = 0.0;
               if (xY >= 0.0 && vn1 >= 0.0) {
                  dX = xX - aX;
                  dY = xY - aY;
                  P1X = dX * normalX;
                  P1Y = dX * normalY;
                  P2X = dY * normalX;
                  P2Y = dY * normalY;
                  vA.x -= invMassA * (P1X + P2X);
                  vA.y -= invMassA * (P1Y + P2Y);
                  wA -= invIA * (cp1.rA.x * P1Y - cp1.rA.y * P1X + cp2.rA.x * P2Y - cp2.rA.y * P2X);
                  vB.x += invMassB * (P1X + P2X);
                  vB.y += invMassB * (P1Y + P2Y);
                  wB += invIB * (cp1.rB.x * P1Y - cp1.rB.y * P1X + cp2.rB.x * P2Y - cp2.rB.y * P2X);
                  cp1.normalImpulse = xX;
                  cp2.normalImpulse = xY;
                  break;
               }
               xX = 0.0;
               xY = 0.0;
               vn1 = bX;
               vn2 = bY;
               if (vn1 >= 0.0 && vn2 >= 0.0) {
                  dX = xX - aX;
                  dY = xY - aY;
                  P1X = dX * normalX;
                  P1Y = dX * normalY;
                  P2X = dY * normalX;
                  P2Y = dY * normalY;
                  vA.x -= invMassA * (P1X + P2X);
                  vA.y -= invMassA * (P1Y + P2Y);
                  wA -= invIA * (cp1.rA.x * P1Y - cp1.rA.y * P1X + cp2.rA.x * P2Y - cp2.rA.y * P2X);
                  vB.x += invMassB * (P1X + P2X);
                  vB.y += invMassB * (P1Y + P2Y);
                  wB += invIB * (cp1.rB.x * P1Y - cp1.rB.y * P1X + cp2.rB.x * P2Y - cp2.rB.y * P2X);
                  cp1.normalImpulse = xX;
                  cp2.normalImpulse = xY;
                  break;
               }
               break;
            }
         }
         bodyA.m_angularVelocity = wA;
         bodyB.m_angularVelocity = wB;
      }
   }
   b2ContactSolver.prototype.FinalizeVelocityConstraints = function () {
      for (var i = 0; i < this.m_constraintCount; ++i) {
         var c = this.m_constraints[i];
         var m = c.manifold;
         for (var j = 0; j < c.pointCount; ++j) {
            var point1 = m.m_points[j];
            var point2 = c.points[j];
            point1.m_normalImpulse = point2.normalImpulse;
            point1.m_tangentImpulse = point2.tangentImpulse;
         }
      }
   }
   b2ContactSolver.prototype.SolvePositionConstraints = function (baumgarte) {
      if (baumgarte === undefined) baumgarte = 0;
      var minSeparation = 0.0;
      for (var i = 0; i < this.m_constraintCount; i++) {
         var c = this.m_constraints[i];
         var bodyA = c.bodyA;
         var bodyB = c.bodyB;
         var invMassA = bodyA.m_mass * bodyA.m_invMass;
         var invIA = bodyA.m_mass * bodyA.m_invI;
         var invMassB = bodyB.m_mass * bodyB.m_invMass;
         var invIB = bodyB.m_mass * bodyB.m_invI;
         b2ContactSolver.s_psm.Initialize(c);
         var normal = b2ContactSolver.s_psm.m_normal;
         for (var j = 0; j < c.pointCount; j++) {
            var ccp = c.points[j];
            var point = b2ContactSolver.s_psm.m_points[j];
            var separation = b2ContactSolver.s_psm.m_separations[j];
            var rAX = point.x - bodyA.m_sweep.c.x;
            var rAY = point.y - bodyA.m_sweep.c.y;
            var rBX = point.x - bodyB.m_sweep.c.x;
            var rBY = point.y - bodyB.m_sweep.c.y;
            minSeparation = minSeparation < separation ? minSeparation : separation;
            var C = b2Math.Clamp(baumgarte * (separation + b2Settings.b2_linearSlop), (-b2Settings.b2_maxLinearCorrection), 0.0);
            var impulse = (-ccp.equalizedMass * C);
            var PX = impulse * normal.x;
            var PY = impulse * normal.y;bodyA.m_sweep.c.x -= invMassA * PX;
            bodyA.m_sweep.c.y -= invMassA * PY;
            bodyA.m_sweep.a -= invIA * (rAX * PY - rAY * PX);
            bodyA.SynchronizeTransform();
            bodyB.m_sweep.c.x += invMassB * PX;
            bodyB.m_sweep.c.y += invMassB * PY;
            bodyB.m_sweep.a += invIB * (rBX * PY - rBY * PX);
            bodyB.SynchronizeTransform();
         }
      }
      return minSeparation > (-1.5 * b2Settings.b2_linearSlop);
   }
   Box2D.postDefs.push(function () {
      Box2D.Dynamics.Contacts.b2ContactSolver.s_worldManifold = new b2WorldManifold();
      Box2D.Dynamics.Contacts.b2ContactSolver.s_psm = new b2PositionSolverManifold();
   });
   Box2D.inherit(b2EdgeAndCircleContact, Box2D.Dynamics.Contacts.b2Contact);
   b2EdgeAndCircleContact.prototype.__super = Box2D.Dynamics.Contacts.b2Contact.prototype;
   b2EdgeAndCircleContact.b2EdgeAndCircleContact = function () {
      Box2D.Dynamics.Contacts.b2Contact.b2Contact.apply(this, arguments);
   };
   b2EdgeAndCircleContact.Create = function (allocator) {
      return new b2EdgeAndCircleContact();
   }
   b2EdgeAndCircleContact.Destroy = function (contact, allocator) {}
   b2EdgeAndCircleContact.prototype.Reset = function (fixtureA, fixtureB) {
      this.__super.Reset.call(this, fixtureA, fixtureB);
   }
   b2EdgeAndCircleContact.prototype.Evaluate = function () {
      var bA = this.m_fixtureA.GetBody();
      var bB = this.m_fixtureB.GetBody();
      this.b2CollideEdgeAndCircle(this.m_manifold, (this.m_fixtureA.GetShape() instanceof b2EdgeShape ? this.m_fixtureA.GetShape() : null), bA.m_xf, (this.m_fixtureB.GetShape() instanceof b2CircleShape ? this.m_fixtureB.GetShape() : null), bB.m_xf);
   }
   b2EdgeAndCircleContact.prototype.b2CollideEdgeAndCircle = function (manifold, edge, xf1, circle, xf2) {}
   Box2D.inherit(b2NullContact, Box2D.Dynamics.Contacts.b2Contact);
   b2NullContact.prototype.__super = Box2D.Dynamics.Contacts.b2Contact.prototype;
   b2NullContact.b2NullContact = function () {
      Box2D.Dynamics.Contacts.b2Contact.b2Contact.apply(this, arguments);
   };
   b2NullContact.prototype.b2NullContact = function () {
      this.__super.b2Contact.call(this);
   }
   b2NullContact.prototype.Evaluate = function () {}
   Box2D.inherit(b2PolyAndCircleContact, Box2D.Dynamics.Contacts.b2Contact);
   b2PolyAndCircleContact.prototype.__super = Box2D.Dynamics.Contacts.b2Contact.prototype;
   b2PolyAndCircleContact.b2PolyAndCircleContact = function () {
      Box2D.Dynamics.Contacts.b2Contact.b2Contact.apply(this, arguments);
   };
   b2PolyAndCircleContact.Create = function (allocator) {
      return new b2PolyAndCircleContact();
   }
   b2PolyAndCircleContact.Destroy = function (contact, allocator) {}
   b2PolyAndCircleContact.prototype.Reset = function (fixtureA, fixtureB) {
      this.__super.Reset.call(this, fixtureA, fixtureB);
      b2Settings.b2Assert(fixtureA.GetType() == b2Shape.e_polygonShape);
      b2Settings.b2Assert(fixtureB.GetType() == b2Shape.e_circleShape);
   }
   b2PolyAndCircleContact.prototype.Evaluate = function () {
      var bA = this.m_fixtureA.m_body;
      var bB = this.m_fixtureB.m_body;
      b2Collision.CollidePolygonAndCircle(this.m_manifold, (this.m_fixtureA.GetShape() instanceof b2PolygonShape ? this.m_fixtureA.GetShape() : null), bA.m_xf, (this.m_fixtureB.GetShape() instanceof b2CircleShape ? this.m_fixtureB.GetShape() : null), bB.m_xf);
   }
   Box2D.inherit(b2PolyAndEdgeContact, Box2D.Dynamics.Contacts.b2Contact);
   b2PolyAndEdgeContact.prototype.__super = Box2D.Dynamics.Contacts.b2Contact.prototype;
   b2PolyAndEdgeContact.b2PolyAndEdgeContact = function () {
      Box2D.Dynamics.Contacts.b2Contact.b2Contact.apply(this, arguments);
   };
   b2PolyAndEdgeContact.Create = function (allocator) {
      return new b2PolyAndEdgeContact();
   }
   b2PolyAndEdgeContact.Destroy = function (contact, allocator) {}
   b2PolyAndEdgeContact.prototype.Reset = function (fixtureA, fixtureB) {
      this.__super.Reset.call(this, fixtureA, fixtureB);
      b2Settings.b2Assert(fixtureA.GetType() == b2Shape.e_polygonShape);
      b2Settings.b2Assert(fixtureB.GetType() == b2Shape.e_edgeShape);
   }
   b2PolyAndEdgeContact.prototype.Evaluate = function () {
      var bA = this.m_fixtureA.GetBody();
      var bB = this.m_fixtureB.GetBody();
      this.b2CollidePolyAndEdge(this.m_manifold, (this.m_fixtureA.GetShape() instanceof b2PolygonShape ? this.m_fixtureA.GetShape() : null), bA.m_xf, (this.m_fixtureB.GetShape() instanceof b2EdgeShape ? this.m_fixtureB.GetShape() : null), bB.m_xf);
   }
   b2PolyAndEdgeContact.prototype.b2CollidePolyAndEdge = function (manifold, polygon, xf1, edge, xf2) {}
   Box2D.inherit(b2PolygonContact, Box2D.Dynamics.Contacts.b2Contact);
   b2PolygonContact.prototype.__super = Box2D.Dynamics.Contacts.b2Contact.prototype;
   b2PolygonContact.b2PolygonContact = function () {
      Box2D.Dynamics.Contacts.b2Contact.b2Contact.apply(this, arguments);
   };
   b2PolygonContact.Create = function (allocator) {
      return new b2PolygonContact();
   }
   b2PolygonContact.Destroy = function (contact, allocator) {}
   b2PolygonContact.prototype.Reset = function (fixtureA, fixtureB) {
      this.__super.Reset.call(this, fixtureA, fixtureB);
   }
   b2PolygonContact.prototype.Evaluate = function () {
      var bA = this.m_fixtureA.GetBody();
      var bB = this.m_fixtureB.GetBody();
      b2Collision.CollidePolygons(this.m_manifold, (this.m_fixtureA.GetShape() instanceof b2PolygonShape ? this.m_fixtureA.GetShape() : null), bA.m_xf, (this.m_fixtureB.GetShape() instanceof b2PolygonShape ? this.m_fixtureB.GetShape() : null), bB.m_xf);
   }
   b2PositionSolverManifold.b2PositionSolverManifold = function () {};
   b2PositionSolverManifold.prototype.b2PositionSolverManifold = function () {
      this.m_normal = new b2Vec2();
      this.m_separations = new Vector_a2j_Number(b2Settings.b2_maxManifoldPoints);
      this.m_points = new Vector(b2Settings.b2_maxManifoldPoints);
      for (var i = 0; i < b2Settings.b2_maxManifoldPoints; i++) {
         this.m_points[i] = new b2Vec2();
      }
   }
   b2PositionSolverManifold.prototype.Initialize = function (cc) {
      b2Settings.b2Assert(cc.pointCount > 0);
      var i = 0;
      var clipPointX = 0;
      var clipPointY = 0;
      var tMat;
      var tVec;
      var planePointX = 0;
      var planePointY = 0;
      switch (cc.type) {
      case b2Manifold.e_circles:
         {
            tMat = cc.bodyA.m_xf.R;
            tVec = cc.localPoint;
            var pointAX = cc.bodyA.m_xf.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
            var pointAY = cc.bodyA.m_xf.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
            tMat = cc.bodyB.m_xf.R;
            tVec = cc.points[0].localPoint;
            var pointBX = cc.bodyB.m_xf.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
            var pointBY = cc.bodyB.m_xf.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
            var dX = pointBX - pointAX;
            var dY = pointBY - pointAY;
            var d2 = dX * dX + dY * dY;
            if (d2 > Number.MIN_VALUE * Number.MIN_VALUE) {
               var d = Math.sqrt(d2);
               this.m_normal.x = dX / d;
               this.m_normal.y = dY / d;
            }
            else {
               this.m_normal.x = 1.0;
               this.m_normal.y = 0.0;
            }
            this.m_points[0].x = 0.5 * (pointAX + pointBX);
            this.m_points[0].y = 0.5 * (pointAY + pointBY);
            this.m_separations[0] = dX * this.m_normal.x + dY * this.m_normal.y - cc.radius;
         }
         break;
      case b2Manifold.e_faceA:
         {
            tMat = cc.bodyA.m_xf.R;
            tVec = cc.localPlaneNormal;
            this.m_normal.x = tMat.col1.x * tVec.x + tMat.col2.x * tVec.y;
            this.m_normal.y = tMat.col1.y * tVec.x + tMat.col2.y * tVec.y;
            tMat = cc.bodyA.m_xf.R;
            tVec = cc.localPoint;
            planePointX = cc.bodyA.m_xf.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
            planePointY = cc.bodyA.m_xf.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
            tMat = cc.bodyB.m_xf.R;
            for (i = 0;
            i < cc.pointCount; ++i) {
               tVec = cc.points[i].localPoint;
               clipPointX = cc.bodyB.m_xf.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
               clipPointY = cc.bodyB.m_xf.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
               this.m_separations[i] = (clipPointX - planePointX) * this.m_normal.x + (clipPointY - planePointY) * this.m_normal.y - cc.radius;
               this.m_points[i].x = clipPointX;
               this.m_points[i].y = clipPointY;
            }
         }
         break;
      case b2Manifold.e_faceB:
         {
            tMat = cc.bodyB.m_xf.R;
            tVec = cc.localPlaneNormal;
            this.m_normal.x = tMat.col1.x * tVec.x + tMat.col2.x * tVec.y;
            this.m_normal.y = tMat.col1.y * tVec.x + tMat.col2.y * tVec.y;
            tMat = cc.bodyB.m_xf.R;
            tVec = cc.localPoint;
            planePointX = cc.bodyB.m_xf.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
            planePointY = cc.bodyB.m_xf.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
            tMat = cc.bodyA.m_xf.R;
            for (i = 0;
            i < cc.pointCount; ++i) {
               tVec = cc.points[i].localPoint;
               clipPointX = cc.bodyA.m_xf.position.x + (tMat.col1.x * tVec.x + tMat.col2.x * tVec.y);
               clipPointY = cc.bodyA.m_xf.position.y + (tMat.col1.y * tVec.x + tMat.col2.y * tVec.y);
               this.m_separations[i] = (clipPointX - planePointX) * this.m_normal.x + (clipPointY - planePointY) * this.m_normal.y - cc.radius;
               this.m_points[i].Set(clipPointX, clipPointY);
            }
            this.m_normal.x *= (-1);
            this.m_normal.y *= (-1);
         }
         break;
      }
   }
   Box2D.postDefs.push(function () {
      Box2D.Dynamics.Contacts.b2PositionSolverManifold.circlePointA = new b2Vec2();
      Box2D.Dynamics.Contacts.b2PositionSolverManifold.circlePointB = new b2Vec2();
   });
})();
(function () {
   var b2Body = Box2D.Dynamics.b2Body,
      b2BodyDef = Box2D.Dynamics.b2BodyDef,
      b2ContactFilter = Box2D.Dynamics.b2ContactFilter,
      b2ContactImpulse = Box2D.Dynamics.b2ContactImpulse,
      b2ContactListener = Box2D.Dynamics.b2ContactListener,
      b2ContactManager = Box2D.Dynamics.b2ContactManager,
      b2DebugDraw = Box2D.Dynamics.b2DebugDraw,
      b2DestructionListener = Box2D.Dynamics.b2DestructionListener,
      b2FilterData = Box2D.Dynamics.b2FilterData,
      b2Fixture = Box2D.Dynamics.b2Fixture,
      b2FixtureDef = Box2D.Dynamics.b2FixtureDef,
      b2Island = Box2D.Dynamics.b2Island,
      b2TimeStep = Box2D.Dynamics.b2TimeStep,
      b2World = Box2D.Dynamics.b2World,
      b2Mat22 = Box2D.Common.Math.b2Mat22,
      b2Mat33 = Box2D.Common.Math.b2Mat33,
      b2Math = Box2D.Common.Math.b2Math,
      b2Sweep = Box2D.Common.Math.b2Sweep,
      b2Transform = Box2D.Common.Math.b2Transform,
      b2Vec2 = Box2D.Common.Math.b2Vec2,
      b2Vec3 = Box2D.Common.Math.b2Vec3,
      b2Color = Box2D.Common.b2Color,
      b2internal = Box2D.Common.b2internal,
      b2Settings = Box2D.Common.b2Settings,
      b2CircleShape = Box2D.Collision.Shapes.b2CircleShape,
      b2EdgeChainDef = Box2D.Collision.Shapes.b2EdgeChainDef,
      b2EdgeShape = Box2D.Collision.Shapes.b2EdgeShape,
      b2MassData = Box2D.Collision.Shapes.b2MassData,
      b2PolygonShape = Box2D.Collision.Shapes.b2PolygonShape,
      b2Shape = Box2D.Collision.Shapes.b2Shape,
      b2BuoyancyController = Box2D.Dynamics.Controllers.b2BuoyancyController,
      b2ConstantAccelController = Box2D.Dynamics.Controllers.b2ConstantAccelController,
      b2ConstantForceController = Box2D.Dynamics.Controllers.b2ConstantForceController,
      b2Controller = Box2D.Dynamics.Controllers.b2Controller,
      b2ControllerEdge = Box2D.Dynamics.Controllers.b2ControllerEdge,
      b2GravityController = Box2D.Dynamics.Controllers.b2GravityController,
      b2TensorDampingController = Box2D.Dynamics.Controllers.b2TensorDampingController;

   Box2D.inherit(b2BuoyancyController, Box2D.Dynamics.Controllers.b2Controller);
   b2BuoyancyController.prototype.__super = Box2D.Dynamics.Controllers.b2Controller.prototype;
   b2BuoyancyController.b2BuoyancyController = function () {
      Box2D.Dynamics.Controllers.b2Controller.b2Controller.apply(this, arguments);
      this.normal = new b2Vec2(0, (-1));
      this.offset = 0;
      this.density = 0;
      this.velocity = new b2Vec2(0, 0);
      this.linearDrag = 2;
      this.angularDrag = 1;
      this.useDensity = false;
      this.useWorldGravity = true;
      this.gravity = null;
   };
   b2BuoyancyController.prototype.Step = function (step) {
      if (!this.m_bodyList) return;
      if (this.useWorldGravity) {
         this.gravity = this.GetWorld().GetGravity().Copy();
      }
      for (var i = this.m_bodyList; i; i = i.nextBody) {
         var body = i.body;
         if (body.IsAwake() == false) {
            continue;
         }
         var areac = new b2Vec2();
         var massc = new b2Vec2();
         var area = 0.0;
         var mass = 0.0;
         for (var fixture = body.GetFixtureList(); fixture; fixture = fixture.GetNext()) {
            var sc = new b2Vec2();
            var sarea = fixture.GetShape().ComputeSubmergedArea(this.normal, this.offset, body.GetTransform(), sc);
            area += sarea;
            areac.x += sarea * sc.x;
            areac.y += sarea * sc.y;
            var shapeDensity = 0;
            if (this.useDensity) {
               shapeDensity = 1;
            }
            else {
               shapeDensity = 1;
            }
            mass += sarea * shapeDensity;
            massc.x += sarea * sc.x * shapeDensity;
            massc.y += sarea * sc.y * shapeDensity;
         }
         areac.x /= area;
         areac.y /= area;
         massc.x /= mass;
         massc.y /= mass;
         if (area < Number.MIN_VALUE) continue;
         var buoyancyForce = this.gravity.GetNegative();
         buoyancyForce.Multiply(this.density * area);
         body.ApplyForce(buoyancyForce, massc);
         var dragForce = body.GetLinearVelocityFromWorldPoint(areac);
         dragForce.Subtract(this.velocity);
         dragForce.Multiply((-this.linearDrag * area));
         body.ApplyForce(dragForce, areac);
         body.ApplyTorque((-body.GetInertia() / body.GetMass() * area * body.GetAngularVelocity() * this.angularDrag));
      }
   }
   b2BuoyancyController.prototype.Draw = function (debugDraw) {
      var r = 1000;
      var p1 = new b2Vec2();
      var p2 = new b2Vec2();
      p1.x = this.normal.x * this.offset + this.normal.y * r;
      p1.y = this.normal.y * this.offset - this.normal.x * r;
      p2.x = this.normal.x * this.offset - this.normal.y * r;
      p2.y = this.normal.y * this.offset + this.normal.x * r;
      var color = new b2Color(0, 0, 1);
      debugDraw.DrawSegment(p1, p2, color);
   }
   Box2D.inherit(b2ConstantAccelController, Box2D.Dynamics.Controllers.b2Controller);
   b2ConstantAccelController.prototype.__super = Box2D.Dynamics.Controllers.b2Controller.prototype;
   b2ConstantAccelController.b2ConstantAccelController = function () {
      Box2D.Dynamics.Controllers.b2Controller.b2Controller.apply(this, arguments);
      this.A = new b2Vec2(0, 0);
   };
   b2ConstantAccelController.prototype.Step = function (step) {
      var smallA = new b2Vec2(this.A.x * step.dt, this.A.y * step.dt);
      for (var i = this.m_bodyList; i; i = i.nextBody) {
         var body = i.body;
         if (!body.IsAwake()) continue;
         body.SetLinearVelocity(new b2Vec2(body.GetLinearVelocity().x + smallA.x, body.GetLinearVelocity().y + smallA.y));
      }
   }
   Box2D.inherit(b2ConstantForceController, Box2D.Dynamics.Controllers.b2Controller);
   b2ConstantForceController.prototype.__super = Box2D.Dynamics.Controllers.b2Controller.prototype;
   b2ConstantForceController.b2ConstantForceController = function () {
      Box2D.Dynamics.Controllers.b2Controller.b2Controller.apply(this, arguments);
      this.F = new b2Vec2(0, 0);
   };
   b2ConstantForceController.prototype.Step = function (step) {
      for (var i = this.m_bodyList; i; i = i.nextBody) {
         var body = i.body;
         if (!body.IsAwake()) continue;
         body.ApplyForce(this.F, body.GetWorldCenter());
      }
   }
   b2Controller.b2Controller = function () {};
   b2Controller.prototype.Step = function (step) {}
   b2Controller.prototype.Draw = function (debugDraw) {}
   b2Controller.prototype.AddBody = function (body) {
      var edge = new b2ControllerEdge();
      edge.controller = this;
      edge.body = body;
      edge.nextBody = this.m_bodyList;
      edge.prevBody = null;
      this.m_bodyList = edge;
      if (edge.nextBody) edge.nextBody.prevBody = edge;
      this.m_bodyCount++;
      edge.nextController = body.m_controllerList;
      edge.prevController = null;
      body.m_controllerList = edge;
      if (edge.nextController) edge.nextController.prevController = edge;
      body.m_controllerCount++;
   }
   b2Controller.prototype.RemoveBody = function (body) {
      var edge = body.m_controllerList;
      while (edge && edge.controller != this)
      edge = edge.nextController;
      if (edge.prevBody) edge.prevBody.nextBody = edge.nextBody;
      if (edge.nextBody) edge.nextBody.prevBody = edge.prevBody;
      if (edge.nextController) edge.nextController.prevController = edge.prevController;
      if (edge.prevController) edge.prevController.nextController = edge.nextController;
      if (this.m_bodyList == edge) this.m_bodyList = edge.nextBody;
      if (body.m_controllerList == edge) body.m_controllerList = edge.nextController;
      body.m_controllerCount--;
      this.m_bodyCount--;
   }
   b2Controller.prototype.Clear = function () {
      while (this.m_bodyList)
      this.RemoveBody(this.m_bodyList.body);
   }
   b2Controller.prototype.GetNext = function () {
      return this.m_next;
   }
   b2Controller.prototype.GetWorld = function () {
      return this.m_world;
   }
   b2Controller.prototype.GetBodyList = function () {
      return this.m_bodyList;
   }
   b2ControllerEdge.b2ControllerEdge = function () {};
   Box2D.inherit(b2GravityController, Box2D.Dynamics.Controllers.b2Controller);
   b2GravityController.prototype.__super = Box2D.Dynamics.Controllers.b2Controller.prototype;
   b2GravityController.b2GravityController = function () {
      Box2D.Dynamics.Controllers.b2Controller.b2Controller.apply(this, arguments);
      this.G = 1;
      this.invSqr = true;
   };
   b2GravityController.prototype.Step = function (step) {
      var i = null;
      var body1 = null;
      var p1 = null;
      var mass1 = 0;
      var j = null;
      var body2 = null;
      var p2 = null;
      var dx = 0;
      var dy = 0;
      var r2 = 0;
      var f = null;
      if (this.invSqr) {
         for (i = this.m_bodyList;
         i; i = i.nextBody) {
            body1 = i.body;
            p1 = body1.GetWorldCenter();
            mass1 = body1.GetMass();
            for (j = this.m_bodyList;
            j != i; j = j.nextBody) {
               body2 = j.body;
               p2 = body2.GetWorldCenter();
               dx = p2.x - p1.x;
               dy = p2.y - p1.y;
               r2 = dx * dx + dy * dy;
               if (r2 < Number.MIN_VALUE) continue;
               f = new b2Vec2(dx, dy);
               f.Multiply(this.G / r2 / Math.sqrt(r2) * mass1 * body2.GetMass());
               if (body1.IsAwake()) body1.ApplyForce(f, p1);
               f.Multiply((-1));
               if (body2.IsAwake()) body2.ApplyForce(f, p2);
            }
         }
      }
      else {
         for (i = this.m_bodyList;
         i; i = i.nextBody) {
            body1 = i.body;
            p1 = body1.GetWorldCenter();
            mass1 = body1.GetMass();
            for (j = this.m_bodyList;
            j != i; j = j.nextBody) {
               body2 = j.body;
               p2 = body2.GetWorldCenter();
               dx = p2.x - p1.x;
               dy = p2.y - p1.y;
               r2 = dx * dx + dy * dy;
               if (r2 < Number.MIN_VALUE) continue;
               f = new b2Vec2(dx, dy);
               f.Multiply(this.G / r2 * mass1 * body2.GetMass());
               if (body1.IsAwake()) body1.ApplyForce(f, p1);
               f.Multiply((-1));
               if (body2.IsAwake()) body2.ApplyForce(f, p2);
            }
         }
      }
   }
   Box2D.inherit(b2TensorDampingController, Box2D.Dynamics.Controllers.b2Controller);
   b2TensorDampingController.prototype.__super = Box2D.Dynamics.Controllers.b2Controller.prototype;
   b2TensorDampingController.b2TensorDampingController = function () {
      Box2D.Dynamics.Controllers.b2Controller.b2Controller.apply(this, arguments);
      this.T = new b2Mat22();
      this.maxTimestep = 0;
   };
   b2TensorDampingController.prototype.SetAxisAligned = function (xDamping, yDamping) {
      if (xDamping === undefined) xDamping = 0;
      if (yDamping === undefined) yDamping = 0;
      this.T.col1.x = (-xDamping);
      this.T.col1.y = 0;
      this.T.col2.x = 0;
      this.T.col2.y = (-yDamping);
      if (xDamping > 0 || yDamping > 0) {
         this.maxTimestep = 1 / Math.max(xDamping, yDamping);
      }
      else {
         this.maxTimestep = 0;
      }
   }
   b2TensorDampingController.prototype.Step = function (step) {
      var timestep = step.dt;
      if (timestep <= Number.MIN_VALUE) return;
      if (timestep > this.maxTimestep && this.maxTimestep > 0) timestep = this.maxTimestep;
      for (var i = this.m_bodyList; i; i = i.nextBody) {
         var body = i.body;
         if (!body.IsAwake()) {
            continue;
         }
         var damping = body.GetWorldVector(b2Math.MulMV(this.T, body.GetLocalVector(body.GetLinearVelocity())));
         body.SetLinearVelocity(new b2Vec2(body.GetLinearVelocity().x + damping.x * timestep, body.GetLinearVelocity().y + damping.y * timestep));
      }
   }
})();
(function () {
   var b2Color = Box2D.Common.b2Color,
      b2internal = Box2D.Common.b2internal,
      b2Settings = Box2D.Common.b2Settings,
      b2Mat22 = Box2D.Common.Math.b2Mat22,
      b2Mat33 = Box2D.Common.Math.b2Mat33,
      b2Math = Box2D.Common.Math.b2Math,
      b2Sweep = Box2D.Common.Math.b2Sweep,
      b2Transform = Box2D.Common.Math.b2Transform,
      b2Vec2 = Box2D.Common.Math.b2Vec2,
      b2Vec3 = Box2D.Common.Math.b2Vec3,
      b2DistanceJoint = Box2D.Dynamics.Joints.b2DistanceJoint,
      b2DistanceJointDef = Box2D.Dynamics.Joints.b2DistanceJointDef,
      b2FrictionJoint = Box2D.Dynamics.Joints.b2FrictionJoint,
      b2FrictionJointDef = Box2D.Dynamics.Joints.b2FrictionJointDef,
      b2GearJoint = Box2D.Dynamics.Joints.b2GearJoint,
      b2GearJointDef = Box2D.Dynamics.Joints.b2GearJointDef,
      b2Jacobian = Box2D.Dynamics.Joints.b2Jacobian,
      b2Joint = Box2D.Dynamics.Joints.b2Joint,
      b2JointDef = Box2D.Dynamics.Joints.b2JointDef,
      b2JointEdge = Box2D.Dynamics.Joints.b2JointEdge,
      b2LineJoint = Box2D.Dynamics.Joints.b2LineJoint,
      b2LineJointDef = Box2D.Dynamics.Joints.b2LineJointDef,
      b2MouseJoint = Box2D.Dynamics.Joints.b2MouseJoint,
      b2MouseJointDef = Box2D.Dynamics.Joints.b2MouseJointDef,
      b2PrismaticJoint = Box2D.Dynamics.Joints.b2PrismaticJoint,
      b2PrismaticJointDef = Box2D.Dynamics.Joints.b2PrismaticJointDef,
      b2PulleyJoint = Box2D.Dynamics.Joints.b2PulleyJoint,
      b2PulleyJointDef = Box2D.Dynamics.Joints.b2PulleyJointDef,
      b2RevoluteJoint = Box2D.Dynamics.Joints.b2RevoluteJoint,
      b2RevoluteJointDef = Box2D.Dynamics.Joints.b2RevoluteJointDef,
      b2WeldJoint = Box2D.Dynamics.Joints.b2WeldJoint,
      b2WeldJointDef = Box2D.Dynamics.Joints.b2WeldJointDef,
      b2Body = Box2D.Dynamics.b2Body,
      b2BodyDef = Box2D.Dynamics.b2BodyDef,
      b2ContactFilter = Box2D.Dynamics.b2ContactFilter,
      b2ContactImpulse = Box2D.Dynamics.b2ContactImpulse,
      b2ContactListener = Box2D.Dynamics.b2ContactListener,
      b2ContactManager = Box2D.Dynamics.b2ContactManager,
      b2DebugDraw = Box2D.Dynamics.b2DebugDraw,
      b2DestructionListener = Box2D.Dynamics.b2DestructionListener,
      b2FilterData = Box2D.Dynamics.b2FilterData,
      b2Fixture = Box2D.Dynamics.b2Fixture,
      b2FixtureDef = Box2D.Dynamics.b2FixtureDef,
      b2Island = Box2D.Dynamics.b2Island,
      b2TimeStep = Box2D.Dynamics.b2TimeStep,
      b2World = Box2D.Dynamics.b2World;

   Box2D.inherit(b2DistanceJoint, Box2D.Dynamics.Joints.b2Joint);
   b2DistanceJoint.prototype.__super = Box2D.Dynamics.Joints.b2Joint.prototype;
   b2DistanceJoint.b2DistanceJoint = function () {
      Box2D.Dynamics.Joints.b2Joint.b2Joint.apply(this, arguments);
      this.m_localAnchor1 = new b2Vec2();
      this.m_localAnchor2 = new b2Vec2();
      this.m_u = new b2Vec2();
   };
   b2DistanceJoint.prototype.GetAnchorA = function () {
      return this.m_bodyA.GetWorldPoint(this.m_localAnchor1);
   }
   b2DistanceJoint.prototype.GetAnchorB = function () {
      return this.m_bodyB.GetWorldPoint(this.m_localAnchor2);
   }
   b2DistanceJoint.prototype.GetReactionForce = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return new b2Vec2(inv_dt * this.m_impulse * this.m_u.x, inv_dt * this.m_impulse * this.m_u.y);
   }
   b2DistanceJoint.prototype.GetReactionTorque = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return 0.0;
   }
   b2DistanceJoint.prototype.GetLength = function () {
      return this.m_length;
   }
   b2DistanceJoint.prototype.SetLength = function (length) {
      if (length === undefined) length = 0;
      this.m_length = length;
   }
   b2DistanceJoint.prototype.GetFrequency = function () {
      return this.m_frequencyHz;
   }
   b2DistanceJoint.prototype.SetFrequency = function (hz) {
      if (hz === undefined) hz = 0;
      this.m_frequencyHz = hz;
   }
   b2DistanceJoint.prototype.GetDampingRatio = function () {
      return this.m_dampingRatio;
   }
   b2DistanceJoint.prototype.SetDampingRatio = function (ratio) {
      if (ratio === undefined) ratio = 0;
      this.m_dampingRatio = ratio;
   }
   b2DistanceJoint.prototype.b2DistanceJoint = function (def) {
      this.__super.b2Joint.call(this, def);
      var tMat;
      var tX = 0;
      var tY = 0;
      this.m_localAnchor1.SetV(def.localAnchorA);
      this.m_localAnchor2.SetV(def.localAnchorB);
      this.m_length = def.length;
      this.m_frequencyHz = def.frequencyHz;
      this.m_dampingRatio = def.dampingRatio;
      this.m_impulse = 0.0;
      this.m_gamma = 0.0;
      this.m_bias = 0.0;
   }
   b2DistanceJoint.prototype.InitVelocityConstraints = function (step) {
      var tMat;
      var tX = 0;
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      tMat = bA.m_xf.R;
      var r1X = this.m_localAnchor1.x - bA.m_sweep.localCenter.x;
      var r1Y = this.m_localAnchor1.y - bA.m_sweep.localCenter.y;
      tX = (tMat.col1.x * r1X + tMat.col2.x * r1Y);
      r1Y = (tMat.col1.y * r1X + tMat.col2.y * r1Y);
      r1X = tX;
      tMat = bB.m_xf.R;
      var r2X = this.m_localAnchor2.x - bB.m_sweep.localCenter.x;
      var r2Y = this.m_localAnchor2.y - bB.m_sweep.localCenter.y;
      tX = (tMat.col1.x * r2X + tMat.col2.x * r2Y);
      r2Y = (tMat.col1.y * r2X + tMat.col2.y * r2Y);
      r2X = tX;
      this.m_u.x = bB.m_sweep.c.x + r2X - bA.m_sweep.c.x - r1X;
      this.m_u.y = bB.m_sweep.c.y + r2Y - bA.m_sweep.c.y - r1Y;
      var length = Math.sqrt(this.m_u.x * this.m_u.x + this.m_u.y * this.m_u.y);
      if (length > b2Settings.b2_linearSlop) {
         this.m_u.Multiply(1.0 / length);
      }
      else {
         this.m_u.SetZero();
      }
      var cr1u = (r1X * this.m_u.y - r1Y * this.m_u.x);
      var cr2u = (r2X * this.m_u.y - r2Y * this.m_u.x);
      var invMass = bA.m_invMass + bA.m_invI * cr1u * cr1u + bB.m_invMass + bB.m_invI * cr2u * cr2u;
      this.m_mass = invMass != 0.0 ? 1.0 / invMass : 0.0;
      if (this.m_frequencyHz > 0.0) {
         var C = length - this.m_length;
         var omega = 2.0 * Math.PI * this.m_frequencyHz;
         var d = 2.0 * this.m_mass * this.m_dampingRatio * omega;
         var k = this.m_mass * omega * omega;
         this.m_gamma = step.dt * (d + step.dt * k);
         this.m_gamma = this.m_gamma != 0.0 ? 1 / this.m_gamma : 0.0;
         this.m_bias = C * step.dt * k * this.m_gamma;
         this.m_mass = invMass + this.m_gamma;
         this.m_mass = this.m_mass != 0.0 ? 1.0 / this.m_mass : 0.0;
      }
      if (step.warmStarting) {
         this.m_impulse *= step.dtRatio;
         var PX = this.m_impulse * this.m_u.x;
         var PY = this.m_impulse * this.m_u.y;
         bA.m_linearVelocity.x -= bA.m_invMass * PX;
         bA.m_linearVelocity.y -= bA.m_invMass * PY;
         bA.m_angularVelocity -= bA.m_invI * (r1X * PY - r1Y * PX);
         bB.m_linearVelocity.x += bB.m_invMass * PX;
         bB.m_linearVelocity.y += bB.m_invMass * PY;
         bB.m_angularVelocity += bB.m_invI * (r2X * PY - r2Y * PX);
      }
      else {
         this.m_impulse = 0.0;
      }
   }
   b2DistanceJoint.prototype.SolveVelocityConstraints = function (step) {
      var tMat;
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      tMat = bA.m_xf.R;
      var r1X = this.m_localAnchor1.x - bA.m_sweep.localCenter.x;
      var r1Y = this.m_localAnchor1.y - bA.m_sweep.localCenter.y;
      var tX = (tMat.col1.x * r1X + tMat.col2.x * r1Y);
      r1Y = (tMat.col1.y * r1X + tMat.col2.y * r1Y);
      r1X = tX;
      tMat = bB.m_xf.R;
      var r2X = this.m_localAnchor2.x - bB.m_sweep.localCenter.x;
      var r2Y = this.m_localAnchor2.y - bB.m_sweep.localCenter.y;
      tX = (tMat.col1.x * r2X + tMat.col2.x * r2Y);
      r2Y = (tMat.col1.y * r2X + tMat.col2.y * r2Y);
      r2X = tX;
      var v1X = bA.m_linearVelocity.x + ((-bA.m_angularVelocity * r1Y));
      var v1Y = bA.m_linearVelocity.y + (bA.m_angularVelocity * r1X);
      var v2X = bB.m_linearVelocity.x + ((-bB.m_angularVelocity * r2Y));
      var v2Y = bB.m_linearVelocity.y + (bB.m_angularVelocity * r2X);
      var Cdot = (this.m_u.x * (v2X - v1X) + this.m_u.y * (v2Y - v1Y));
      var impulse = (-this.m_mass * (Cdot + this.m_bias + this.m_gamma * this.m_impulse));
      this.m_impulse += impulse;
      var PX = impulse * this.m_u.x;
      var PY = impulse * this.m_u.y;
      bA.m_linearVelocity.x -= bA.m_invMass * PX;
      bA.m_linearVelocity.y -= bA.m_invMass * PY;
      bA.m_angularVelocity -= bA.m_invI * (r1X * PY - r1Y * PX);
      bB.m_linearVelocity.x += bB.m_invMass * PX;
      bB.m_linearVelocity.y += bB.m_invMass * PY;
      bB.m_angularVelocity += bB.m_invI * (r2X * PY - r2Y * PX);
   }
   b2DistanceJoint.prototype.SolvePositionConstraints = function (baumgarte) {
      if (baumgarte === undefined) baumgarte = 0;
      var tMat;
      if (this.m_frequencyHz > 0.0) {
         return true;
      }
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      tMat = bA.m_xf.R;
      var r1X = this.m_localAnchor1.x - bA.m_sweep.localCenter.x;
      var r1Y = this.m_localAnchor1.y - bA.m_sweep.localCenter.y;
      var tX = (tMat.col1.x * r1X + tMat.col2.x * r1Y);
      r1Y = (tMat.col1.y * r1X + tMat.col2.y * r1Y);
      r1X = tX;
      tMat = bB.m_xf.R;
      var r2X = this.m_localAnchor2.x - bB.m_sweep.localCenter.x;
      var r2Y = this.m_localAnchor2.y - bB.m_sweep.localCenter.y;
      tX = (tMat.col1.x * r2X + tMat.col2.x * r2Y);
      r2Y = (tMat.col1.y * r2X + tMat.col2.y * r2Y);
      r2X = tX;
      var dX = bB.m_sweep.c.x + r2X - bA.m_sweep.c.x - r1X;
      var dY = bB.m_sweep.c.y + r2Y - bA.m_sweep.c.y - r1Y;
      var length = Math.sqrt(dX * dX + dY * dY);
      dX /= length;
      dY /= length;
      var C = length - this.m_length;
      C = b2Math.Clamp(C, (-b2Settings.b2_maxLinearCorrection), b2Settings.b2_maxLinearCorrection);
      var impulse = (-this.m_mass * C);
      this.m_u.Set(dX, dY);
      var PX = impulse * this.m_u.x;
      var PY = impulse * this.m_u.y;
      bA.m_sweep.c.x -= bA.m_invMass * PX;
      bA.m_sweep.c.y -= bA.m_invMass * PY;
      bA.m_sweep.a -= bA.m_invI * (r1X * PY - r1Y * PX);
      bB.m_sweep.c.x += bB.m_invMass * PX;
      bB.m_sweep.c.y += bB.m_invMass * PY;
      bB.m_sweep.a += bB.m_invI * (r2X * PY - r2Y * PX);
      bA.SynchronizeTransform();
      bB.SynchronizeTransform();
      return b2Math.Abs(C) < b2Settings.b2_linearSlop;
   }
   Box2D.inherit(b2DistanceJointDef, Box2D.Dynamics.Joints.b2JointDef);
   b2DistanceJointDef.prototype.__super = Box2D.Dynamics.Joints.b2JointDef.prototype;
   b2DistanceJointDef.b2DistanceJointDef = function () {
      Box2D.Dynamics.Joints.b2JointDef.b2JointDef.apply(this, arguments);
      this.localAnchorA = new b2Vec2();
      this.localAnchorB = new b2Vec2();
   };
   b2DistanceJointDef.prototype.b2DistanceJointDef = function () {
      this.__super.b2JointDef.call(this);
      this.type = b2Joint.e_distanceJoint;
      this.length = 1.0;
      this.frequencyHz = 0.0;
      this.dampingRatio = 0.0;
   }
   b2DistanceJointDef.prototype.Initialize = function (bA, bB, anchorA, anchorB) {
      this.bodyA = bA;
      this.bodyB = bB;
      this.localAnchorA.SetV(this.bodyA.GetLocalPoint(anchorA));
      this.localAnchorB.SetV(this.bodyB.GetLocalPoint(anchorB));
      var dX = anchorB.x - anchorA.x;
      var dY = anchorB.y - anchorA.y;
      this.length = Math.sqrt(dX * dX + dY * dY);
      this.frequencyHz = 0.0;
      this.dampingRatio = 0.0;
   }
   Box2D.inherit(b2FrictionJoint, Box2D.Dynamics.Joints.b2Joint);
   b2FrictionJoint.prototype.__super = Box2D.Dynamics.Joints.b2Joint.prototype;
   b2FrictionJoint.b2FrictionJoint = function () {
      Box2D.Dynamics.Joints.b2Joint.b2Joint.apply(this, arguments);
      this.m_localAnchorA = new b2Vec2();
      this.m_localAnchorB = new b2Vec2();
      this.m_linearMass = new b2Mat22();
      this.m_linearImpulse = new b2Vec2();
   };
   b2FrictionJoint.prototype.GetAnchorA = function () {
      return this.m_bodyA.GetWorldPoint(this.m_localAnchorA);
   }
   b2FrictionJoint.prototype.GetAnchorB = function () {
      return this.m_bodyB.GetWorldPoint(this.m_localAnchorB);
   }
   b2FrictionJoint.prototype.GetReactionForce = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return new b2Vec2(inv_dt * this.m_linearImpulse.x, inv_dt * this.m_linearImpulse.y);
   }
   b2FrictionJoint.prototype.GetReactionTorque = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return inv_dt * this.m_angularImpulse;
   }
   b2FrictionJoint.prototype.SetMaxForce = function (force) {
      if (force === undefined) force = 0;
      this.m_maxForce = force;
   }
   b2FrictionJoint.prototype.GetMaxForce = function () {
      return this.m_maxForce;
   }
   b2FrictionJoint.prototype.SetMaxTorque = function (torque) {
      if (torque === undefined) torque = 0;
      this.m_maxTorque = torque;
   }
   b2FrictionJoint.prototype.GetMaxTorque = function () {
      return this.m_maxTorque;
   }
   b2FrictionJoint.prototype.b2FrictionJoint = function (def) {
      this.__super.b2Joint.call(this, def);
      this.m_localAnchorA.SetV(def.localAnchorA);
      this.m_localAnchorB.SetV(def.localAnchorB);
      this.m_linearMass.SetZero();
      this.m_angularMass = 0.0;
      this.m_linearImpulse.SetZero();
      this.m_angularImpulse = 0.0;
      this.m_maxForce = def.maxForce;
      this.m_maxTorque = def.maxTorque;
   }
   b2FrictionJoint.prototype.InitVelocityConstraints = function (step) {
      var tMat;
      var tX = 0;
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      tMat = bA.m_xf.R;
      var rAX = this.m_localAnchorA.x - bA.m_sweep.localCenter.x;
      var rAY = this.m_localAnchorA.y - bA.m_sweep.localCenter.y;
      tX = (tMat.col1.x * rAX + tMat.col2.x * rAY);
      rAY = (tMat.col1.y * rAX + tMat.col2.y * rAY);
      rAX = tX;
      tMat = bB.m_xf.R;
      var rBX = this.m_localAnchorB.x - bB.m_sweep.localCenter.x;
      var rBY = this.m_localAnchorB.y - bB.m_sweep.localCenter.y;
      tX = (tMat.col1.x * rBX + tMat.col2.x * rBY);
      rBY = (tMat.col1.y * rBX + tMat.col2.y * rBY);
      rBX = tX;
      var mA = bA.m_invMass;
      var mB = bB.m_invMass;
      var iA = bA.m_invI;
      var iB = bB.m_invI;
      var K = new b2Mat22();
      K.col1.x = mA + mB;
      K.col2.x = 0.0;
      K.col1.y = 0.0;
      K.col2.y = mA + mB;
      K.col1.x += iA * rAY * rAY;
      K.col2.x += (-iA * rAX * rAY);
      K.col1.y += (-iA * rAX * rAY);
      K.col2.y += iA * rAX * rAX;
      K.col1.x += iB * rBY * rBY;
      K.col2.x += (-iB * rBX * rBY);
      K.col1.y += (-iB * rBX * rBY);
      K.col2.y += iB * rBX * rBX;
      K.GetInverse(this.m_linearMass);
      this.m_angularMass = iA + iB;
      if (this.m_angularMass > 0.0) {
         this.m_angularMass = 1.0 / this.m_angularMass;
      }
      if (step.warmStarting) {
         this.m_linearImpulse.x *= step.dtRatio;
         this.m_linearImpulse.y *= step.dtRatio;
         this.m_angularImpulse *= step.dtRatio;
         var P = this.m_linearImpulse;
         bA.m_linearVelocity.x -= mA * P.x;
         bA.m_linearVelocity.y -= mA * P.y;
         bA.m_angularVelocity -= iA * (rAX * P.y - rAY * P.x + this.m_angularImpulse);
         bB.m_linearVelocity.x += mB * P.x;
         bB.m_linearVelocity.y += mB * P.y;
         bB.m_angularVelocity += iB * (rBX * P.y - rBY * P.x + this.m_angularImpulse);
      }
      else {
         this.m_linearImpulse.SetZero();
         this.m_angularImpulse = 0.0;
      }
   }
   b2FrictionJoint.prototype.SolveVelocityConstraints = function (step) {
      var tMat;
      var tX = 0;
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var vA = bA.m_linearVelocity;
      var wA = bA.m_angularVelocity;
      var vB = bB.m_linearVelocity;
      var wB = bB.m_angularVelocity;
      var mA = bA.m_invMass;
      var mB = bB.m_invMass;
      var iA = bA.m_invI;
      var iB = bB.m_invI;
      tMat = bA.m_xf.R;
      var rAX = this.m_localAnchorA.x - bA.m_sweep.localCenter.x;
      var rAY = this.m_localAnchorA.y - bA.m_sweep.localCenter.y;
      tX = (tMat.col1.x * rAX + tMat.col2.x * rAY);
      rAY = (tMat.col1.y * rAX + tMat.col2.y * rAY);
      rAX = tX;
      tMat = bB.m_xf.R;
      var rBX = this.m_localAnchorB.x - bB.m_sweep.localCenter.x;
      var rBY = this.m_localAnchorB.y - bB.m_sweep.localCenter.y;
      tX = (tMat.col1.x * rBX + tMat.col2.x * rBY);
      rBY = (tMat.col1.y * rBX + tMat.col2.y * rBY);
      rBX = tX;
      var maxImpulse = 0; {
         var Cdot = wB - wA;
         var impulse = (-this.m_angularMass * Cdot);
         var oldImpulse = this.m_angularImpulse;
         maxImpulse = step.dt * this.m_maxTorque;
         this.m_angularImpulse = b2Math.Clamp(this.m_angularImpulse + impulse, (-maxImpulse), maxImpulse);
         impulse = this.m_angularImpulse - oldImpulse;
         wA -= iA * impulse;
         wB += iB * impulse;
      } {
         var CdotX = vB.x - wB * rBY - vA.x + wA * rAY;
         var CdotY = vB.y + wB * rBX - vA.y - wA * rAX;
         var impulseV = b2Math.MulMV(this.m_linearMass, new b2Vec2((-CdotX), (-CdotY)));
         var oldImpulseV = this.m_linearImpulse.Copy();
         this.m_linearImpulse.Add(impulseV);
         maxImpulse = step.dt * this.m_maxForce;
         if (this.m_linearImpulse.LengthSquared() > maxImpulse * maxImpulse) {
            this.m_linearImpulse.Normalize();
            this.m_linearImpulse.Multiply(maxImpulse);
         }
         impulseV = b2Math.SubtractVV(this.m_linearImpulse, oldImpulseV);
         vA.x -= mA * impulseV.x;
         vA.y -= mA * impulseV.y;
         wA -= iA * (rAX * impulseV.y - rAY * impulseV.x);
         vB.x += mB * impulseV.x;
         vB.y += mB * impulseV.y;
         wB += iB * (rBX * impulseV.y - rBY * impulseV.x);
      }
      bA.m_angularVelocity = wA;
      bB.m_angularVelocity = wB;
   }
   b2FrictionJoint.prototype.SolvePositionConstraints = function (baumgarte) {
      if (baumgarte === undefined) baumgarte = 0;
      return true;
   }
   Box2D.inherit(b2FrictionJointDef, Box2D.Dynamics.Joints.b2JointDef);
   b2FrictionJointDef.prototype.__super = Box2D.Dynamics.Joints.b2JointDef.prototype;
   b2FrictionJointDef.b2FrictionJointDef = function () {
      Box2D.Dynamics.Joints.b2JointDef.b2JointDef.apply(this, arguments);
      this.localAnchorA = new b2Vec2();
      this.localAnchorB = new b2Vec2();
   };
   b2FrictionJointDef.prototype.b2FrictionJointDef = function () {
      this.__super.b2JointDef.call(this);
      this.type = b2Joint.e_frictionJoint;
      this.maxForce = 0.0;
      this.maxTorque = 0.0;
   }
   b2FrictionJointDef.prototype.Initialize = function (bA, bB, anchor) {
      this.bodyA = bA;
      this.bodyB = bB;
      this.localAnchorA.SetV(this.bodyA.GetLocalPoint(anchor));
      this.localAnchorB.SetV(this.bodyB.GetLocalPoint(anchor));
   }
   Box2D.inherit(b2GearJoint, Box2D.Dynamics.Joints.b2Joint);
   b2GearJoint.prototype.__super = Box2D.Dynamics.Joints.b2Joint.prototype;
   b2GearJoint.b2GearJoint = function () {
      Box2D.Dynamics.Joints.b2Joint.b2Joint.apply(this, arguments);
      this.m_groundAnchor1 = new b2Vec2();
      this.m_groundAnchor2 = new b2Vec2();
      this.m_localAnchor1 = new b2Vec2();
      this.m_localAnchor2 = new b2Vec2();
      this.m_J = new b2Jacobian();
   };
   b2GearJoint.prototype.GetAnchorA = function () {
      return this.m_bodyA.GetWorldPoint(this.m_localAnchor1);
   }
   b2GearJoint.prototype.GetAnchorB = function () {
      return this.m_bodyB.GetWorldPoint(this.m_localAnchor2);
   }
   b2GearJoint.prototype.GetReactionForce = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return new b2Vec2(inv_dt * this.m_impulse * this.m_J.linearB.x, inv_dt * this.m_impulse * this.m_J.linearB.y);
   }
   b2GearJoint.prototype.GetReactionTorque = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      var tMat = this.m_bodyB.m_xf.R;
      var rX = this.m_localAnchor1.x - this.m_bodyB.m_sweep.localCenter.x;
      var rY = this.m_localAnchor1.y - this.m_bodyB.m_sweep.localCenter.y;
      var tX = tMat.col1.x * rX + tMat.col2.x * rY;
      rY = tMat.col1.y * rX + tMat.col2.y * rY;
      rX = tX;
      var PX = this.m_impulse * this.m_J.linearB.x;
      var PY = this.m_impulse * this.m_J.linearB.y;
      return inv_dt * (this.m_impulse * this.m_J.angularB - rX * PY + rY * PX);
   }
   b2GearJoint.prototype.GetRatio = function () {
      return this.m_ratio;
   }
   b2GearJoint.prototype.SetRatio = function (ratio) {
      if (ratio === undefined) ratio = 0;
      this.m_ratio = ratio;
   }
   b2GearJoint.prototype.b2GearJoint = function (def) {
      this.__super.b2Joint.call(this, def);
      var type1 = parseInt(def.joint1.m_type);
      var type2 = parseInt(def.joint2.m_type);
      this.m_revolute1 = null;
      this.m_prismatic1 = null;
      this.m_revolute2 = null;
      this.m_prismatic2 = null;
      var coordinate1 = 0;
      var coordinate2 = 0;
      this.m_ground1 = def.joint1.GetBodyA();
      this.m_bodyA = def.joint1.GetBodyB();
      if (type1 == b2Joint.e_revoluteJoint) {
         this.m_revolute1 = (def.joint1 instanceof b2RevoluteJoint ? def.joint1 : null);
         this.m_groundAnchor1.SetV(this.m_revolute1.m_localAnchor1);
         this.m_localAnchor1.SetV(this.m_revolute1.m_localAnchor2);
         coordinate1 = this.m_revolute1.GetJointAngle();
      }
      else {
         this.m_prismatic1 = (def.joint1 instanceof b2PrismaticJoint ? def.joint1 : null);
         this.m_groundAnchor1.SetV(this.m_prismatic1.m_localAnchor1);
         this.m_localAnchor1.SetV(this.m_prismatic1.m_localAnchor2);
         coordinate1 = this.m_prismatic1.GetJointTranslation();
      }
      this.m_ground2 = def.joint2.GetBodyA();
      this.m_bodyB = def.joint2.GetBodyB();
      if (type2 == b2Joint.e_revoluteJoint) {
         this.m_revolute2 = (def.joint2 instanceof b2RevoluteJoint ? def.joint2 : null);
         this.m_groundAnchor2.SetV(this.m_revolute2.m_localAnchor1);
         this.m_localAnchor2.SetV(this.m_revolute2.m_localAnchor2);
         coordinate2 = this.m_revolute2.GetJointAngle();
      }
      else {
         this.m_prismatic2 = (def.joint2 instanceof b2PrismaticJoint ? def.joint2 : null);
         this.m_groundAnchor2.SetV(this.m_prismatic2.m_localAnchor1);
         this.m_localAnchor2.SetV(this.m_prismatic2.m_localAnchor2);
         coordinate2 = this.m_prismatic2.GetJointTranslation();
      }
      this.m_ratio = def.ratio;
      this.m_constant = coordinate1 + this.m_ratio * coordinate2;
      this.m_impulse = 0.0;
   }
   b2GearJoint.prototype.InitVelocityConstraints = function (step) {
      var g1 = this.m_ground1;
      var g2 = this.m_ground2;
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var ugX = 0;
      var ugY = 0;
      var rX = 0;
      var rY = 0;
      var tMat;
      var tVec;
      var crug = 0;
      var tX = 0;
      var K = 0.0;
      this.m_J.SetZero();
      if (this.m_revolute1) {
         this.m_J.angularA = (-1.0);
         K += bA.m_invI;
      }
      else {
         tMat = g1.m_xf.R;
         tVec = this.m_prismatic1.m_localXAxis1;
         ugX = tMat.col1.x * tVec.x + tMat.col2.x * tVec.y;
         ugY = tMat.col1.y * tVec.x + tMat.col2.y * tVec.y;
         tMat = bA.m_xf.R;
         rX = this.m_localAnchor1.x - bA.m_sweep.localCenter.x;
         rY = this.m_localAnchor1.y - bA.m_sweep.localCenter.y;
         tX = tMat.col1.x * rX + tMat.col2.x * rY;
         rY = tMat.col1.y * rX + tMat.col2.y * rY;
         rX = tX;
         crug = rX * ugY - rY * ugX;
         this.m_J.linearA.Set((-ugX), (-ugY));
         this.m_J.angularA = (-crug);
         K += bA.m_invMass + bA.m_invI * crug * crug;
      }
      if (this.m_revolute2) {
         this.m_J.angularB = (-this.m_ratio);
         K += this.m_ratio * this.m_ratio * bB.m_invI;
      }
      else {
         tMat = g2.m_xf.R;
         tVec = this.m_prismatic2.m_localXAxis1;
         ugX = tMat.col1.x * tVec.x + tMat.col2.x * tVec.y;
         ugY = tMat.col1.y * tVec.x + tMat.col2.y * tVec.y;
         tMat = bB.m_xf.R;
         rX = this.m_localAnchor2.x - bB.m_sweep.localCenter.x;
         rY = this.m_localAnchor2.y - bB.m_sweep.localCenter.y;
         tX = tMat.col1.x * rX + tMat.col2.x * rY;
         rY = tMat.col1.y * rX + tMat.col2.y * rY;
         rX = tX;
         crug = rX * ugY - rY * ugX;
         this.m_J.linearB.Set((-this.m_ratio * ugX), (-this.m_ratio * ugY));
         this.m_J.angularB = (-this.m_ratio * crug);
         K += this.m_ratio * this.m_ratio * (bB.m_invMass + bB.m_invI * crug * crug);
      }
      this.m_mass = K > 0.0 ? 1.0 / K : 0.0;
      if (step.warmStarting) {
         bA.m_linearVelocity.x += bA.m_invMass * this.m_impulse * this.m_J.linearA.x;
         bA.m_linearVelocity.y += bA.m_invMass * this.m_impulse * this.m_J.linearA.y;
         bA.m_angularVelocity += bA.m_invI * this.m_impulse * this.m_J.angularA;
         bB.m_linearVelocity.x += bB.m_invMass * this.m_impulse * this.m_J.linearB.x;
         bB.m_linearVelocity.y += bB.m_invMass * this.m_impulse * this.m_J.linearB.y;
         bB.m_angularVelocity += bB.m_invI * this.m_impulse * this.m_J.angularB;
      }
      else {
         this.m_impulse = 0.0;
      }
   }
   b2GearJoint.prototype.SolveVelocityConstraints = function (step) {
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var Cdot = this.m_J.Compute(bA.m_linearVelocity, bA.m_angularVelocity, bB.m_linearVelocity, bB.m_angularVelocity);
      var impulse = (-this.m_mass * Cdot);
      this.m_impulse += impulse;
      bA.m_linearVelocity.x += bA.m_invMass * impulse * this.m_J.linearA.x;
      bA.m_linearVelocity.y += bA.m_invMass * impulse * this.m_J.linearA.y;
      bA.m_angularVelocity += bA.m_invI * impulse * this.m_J.angularA;
      bB.m_linearVelocity.x += bB.m_invMass * impulse * this.m_J.linearB.x;
      bB.m_linearVelocity.y += bB.m_invMass * impulse * this.m_J.linearB.y;
      bB.m_angularVelocity += bB.m_invI * impulse * this.m_J.angularB;
   }
   b2GearJoint.prototype.SolvePositionConstraints = function (baumgarte) {
      if (baumgarte === undefined) baumgarte = 0;
      var linearError = 0.0;
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var coordinate1 = 0;
      var coordinate2 = 0;
      if (this.m_revolute1) {
         coordinate1 = this.m_revolute1.GetJointAngle();
      }
      else {
         coordinate1 = this.m_prismatic1.GetJointTranslation();
      }
      if (this.m_revolute2) {
         coordinate2 = this.m_revolute2.GetJointAngle();
      }
      else {
         coordinate2 = this.m_prismatic2.GetJointTranslation();
      }
      var C = this.m_constant - (coordinate1 + this.m_ratio * coordinate2);
      var impulse = (-this.m_mass * C);
      bA.m_sweep.c.x += bA.m_invMass * impulse * this.m_J.linearA.x;
      bA.m_sweep.c.y += bA.m_invMass * impulse * this.m_J.linearA.y;
      bA.m_sweep.a += bA.m_invI * impulse * this.m_J.angularA;
      bB.m_sweep.c.x += bB.m_invMass * impulse * this.m_J.linearB.x;
      bB.m_sweep.c.y += bB.m_invMass * impulse * this.m_J.linearB.y;
      bB.m_sweep.a += bB.m_invI * impulse * this.m_J.angularB;
      bA.SynchronizeTransform();
      bB.SynchronizeTransform();
      return linearError < b2Settings.b2_linearSlop;
   }
   Box2D.inherit(b2GearJointDef, Box2D.Dynamics.Joints.b2JointDef);
   b2GearJointDef.prototype.__super = Box2D.Dynamics.Joints.b2JointDef.prototype;
   b2GearJointDef.b2GearJointDef = function () {
      Box2D.Dynamics.Joints.b2JointDef.b2JointDef.apply(this, arguments);
   };
   b2GearJointDef.prototype.b2GearJointDef = function () {
      this.__super.b2JointDef.call(this);
      this.type = b2Joint.e_gearJoint;
      this.joint1 = null;
      this.joint2 = null;
      this.ratio = 1.0;
   }
   b2Jacobian.b2Jacobian = function () {
      this.linearA = new b2Vec2();
      this.linearB = new b2Vec2();
   };
   b2Jacobian.prototype.SetZero = function () {
      this.linearA.SetZero();
      this.angularA = 0.0;
      this.linearB.SetZero();
      this.angularB = 0.0;
   }
   b2Jacobian.prototype.Set = function (x1, a1, x2, a2) {
      if (a1 === undefined) a1 = 0;
      if (a2 === undefined) a2 = 0;
      this.linearA.SetV(x1);
      this.angularA = a1;
      this.linearB.SetV(x2);
      this.angularB = a2;
   }
   b2Jacobian.prototype.Compute = function (x1, a1, x2, a2) {
      if (a1 === undefined) a1 = 0;
      if (a2 === undefined) a2 = 0;
      return (this.linearA.x * x1.x + this.linearA.y * x1.y) + this.angularA * a1 + (this.linearB.x * x2.x + this.linearB.y * x2.y) + this.angularB * a2;
   }
   b2Joint.b2Joint = function () {
      this.m_edgeA = new b2JointEdge();
      this.m_edgeB = new b2JointEdge();
      this.m_localCenterA = new b2Vec2();
      this.m_localCenterB = new b2Vec2();
   };
   b2Joint.prototype.GetType = function () {
      return this.m_type;
   }
   b2Joint.prototype.GetAnchorA = function () {
      return null;
   }
   b2Joint.prototype.GetAnchorB = function () {
      return null;
   }
   b2Joint.prototype.GetReactionForce = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return null;
   }
   b2Joint.prototype.GetReactionTorque = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return 0.0;
   }
   b2Joint.prototype.GetBodyA = function () {
      return this.m_bodyA;
   }
   b2Joint.prototype.GetBodyB = function () {
      return this.m_bodyB;
   }
   b2Joint.prototype.GetNext = function () {
      return this.m_next;
   }
   b2Joint.prototype.GetUserData = function () {
      return this.m_userData;
   }
   b2Joint.prototype.SetUserData = function (data) {
      this.m_userData = data;
   }
   b2Joint.prototype.IsActive = function () {
      return this.m_bodyA.IsActive() && this.m_bodyB.IsActive();
   }
   b2Joint.Create = function (def, allocator) {
      var joint = null;
      switch (def.type) {
      case b2Joint.e_distanceJoint:
         {
            joint = new b2DistanceJoint((def instanceof b2DistanceJointDef ? def : null));
         }
         break;
      case b2Joint.e_mouseJoint:
         {
            joint = new b2MouseJoint((def instanceof b2MouseJointDef ? def : null));
         }
         break;
      case b2Joint.e_prismaticJoint:
         {
            joint = new b2PrismaticJoint((def instanceof b2PrismaticJointDef ? def : null));
         }
         break;
      case b2Joint.e_revoluteJoint:
         {
            joint = new b2RevoluteJoint((def instanceof b2RevoluteJointDef ? def : null));
         }
         break;
      case b2Joint.e_pulleyJoint:
         {
            joint = new b2PulleyJoint((def instanceof b2PulleyJointDef ? def : null));
         }
         break;
      case b2Joint.e_gearJoint:
         {
            joint = new b2GearJoint((def instanceof b2GearJointDef ? def : null));
         }
         break;
      case b2Joint.e_lineJoint:
         {
            joint = new b2LineJoint((def instanceof b2LineJointDef ? def : null));
         }
         break;
      case b2Joint.e_weldJoint:
         {
            joint = new b2WeldJoint((def instanceof b2WeldJointDef ? def : null));
         }
         break;
      case b2Joint.e_frictionJoint:
         {
            joint = new b2FrictionJoint((def instanceof b2FrictionJointDef ? def : null));
         }
         break;
      default:
         break;
      }
      return joint;
   }
   b2Joint.Destroy = function (joint, allocator) {}
   b2Joint.prototype.b2Joint = function (def) {
      b2Settings.b2Assert(def.bodyA != def.bodyB);
      this.m_type = def.type;
      this.m_prev = null;
      this.m_next = null;
      this.m_bodyA = def.bodyA;
      this.m_bodyB = def.bodyB;
      this.m_collideConnected = def.collideConnected;
      this.m_islandFlag = false;
      this.m_userData = def.userData;
   }
   b2Joint.prototype.InitVelocityConstraints = function (step) {}
   b2Joint.prototype.SolveVelocityConstraints = function (step) {}
   b2Joint.prototype.FinalizeVelocityConstraints = function () {}
   b2Joint.prototype.SolvePositionConstraints = function (baumgarte) {
      if (baumgarte === undefined) baumgarte = 0;
      return false;
   }
   Box2D.postDefs.push(function () {
      Box2D.Dynamics.Joints.b2Joint.e_unknownJoint = 0;
      Box2D.Dynamics.Joints.b2Joint.e_revoluteJoint = 1;
      Box2D.Dynamics.Joints.b2Joint.e_prismaticJoint = 2;
      Box2D.Dynamics.Joints.b2Joint.e_distanceJoint = 3;
      Box2D.Dynamics.Joints.b2Joint.e_pulleyJoint = 4;
      Box2D.Dynamics.Joints.b2Joint.e_mouseJoint = 5;
      Box2D.Dynamics.Joints.b2Joint.e_gearJoint = 6;
      Box2D.Dynamics.Joints.b2Joint.e_lineJoint = 7;
      Box2D.Dynamics.Joints.b2Joint.e_weldJoint = 8;
      Box2D.Dynamics.Joints.b2Joint.e_frictionJoint = 9;
      Box2D.Dynamics.Joints.b2Joint.e_inactiveLimit = 0;
      Box2D.Dynamics.Joints.b2Joint.e_atLowerLimit = 1;
      Box2D.Dynamics.Joints.b2Joint.e_atUpperLimit = 2;
      Box2D.Dynamics.Joints.b2Joint.e_equalLimits = 3;
   });
   b2JointDef.b2JointDef = function () {};
   b2JointDef.prototype.b2JointDef = function () {
      this.type = b2Joint.e_unknownJoint;
      this.userData = null;
      this.bodyA = null;
      this.bodyB = null;
      this.collideConnected = false;
   }
   b2JointEdge.b2JointEdge = function () {};
   Box2D.inherit(b2LineJoint, Box2D.Dynamics.Joints.b2Joint);
   b2LineJoint.prototype.__super = Box2D.Dynamics.Joints.b2Joint.prototype;
   b2LineJoint.b2LineJoint = function () {
      Box2D.Dynamics.Joints.b2Joint.b2Joint.apply(this, arguments);
      this.m_localAnchor1 = new b2Vec2();
      this.m_localAnchor2 = new b2Vec2();
      this.m_localXAxis1 = new b2Vec2();
      this.m_localYAxis1 = new b2Vec2();
      this.m_axis = new b2Vec2();
      this.m_perp = new b2Vec2();
      this.m_K = new b2Mat22();
      this.m_impulse = new b2Vec2();
   };
   b2LineJoint.prototype.GetAnchorA = function () {
      return this.m_bodyA.GetWorldPoint(this.m_localAnchor1);
   }
   b2LineJoint.prototype.GetAnchorB = function () {
      return this.m_bodyB.GetWorldPoint(this.m_localAnchor2);
   }
   b2LineJoint.prototype.GetReactionForce = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return new b2Vec2(inv_dt * (this.m_impulse.x * this.m_perp.x + (this.m_motorImpulse + this.m_impulse.y) * this.m_axis.x), inv_dt * (this.m_impulse.x * this.m_perp.y + (this.m_motorImpulse + this.m_impulse.y) * this.m_axis.y));
   }
   b2LineJoint.prototype.GetReactionTorque = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return inv_dt * this.m_impulse.y;
   }
   b2LineJoint.prototype.GetJointTranslation = function () {
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var tMat;
      var p1 = bA.GetWorldPoint(this.m_localAnchor1);
      var p2 = bB.GetWorldPoint(this.m_localAnchor2);
      var dX = p2.x - p1.x;
      var dY = p2.y - p1.y;
      var axis = bA.GetWorldVector(this.m_localXAxis1);
      var translation = axis.x * dX + axis.y * dY;
      return translation;
   }
   b2LineJoint.prototype.GetJointSpeed = function () {
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var tMat;
      tMat = bA.m_xf.R;
      var r1X = this.m_localAnchor1.x - bA.m_sweep.localCenter.x;
      var r1Y = this.m_localAnchor1.y - bA.m_sweep.localCenter.y;
      var tX = (tMat.col1.x * r1X + tMat.col2.x * r1Y);
      r1Y = (tMat.col1.y * r1X + tMat.col2.y * r1Y);
      r1X = tX;
      tMat = bB.m_xf.R;
      var r2X = this.m_localAnchor2.x - bB.m_sweep.localCenter.x;
      var r2Y = this.m_localAnchor2.y - bB.m_sweep.localCenter.y;
      tX = (tMat.col1.x * r2X + tMat.col2.x * r2Y);
      r2Y = (tMat.col1.y * r2X + tMat.col2.y * r2Y);
      r2X = tX;
      var p1X = bA.m_sweep.c.x + r1X;
      var p1Y = bA.m_sweep.c.y + r1Y;
      var p2X = bB.m_sweep.c.x + r2X;
      var p2Y = bB.m_sweep.c.y + r2Y;
      var dX = p2X - p1X;
      var dY = p2Y - p1Y;
      var axis = bA.GetWorldVector(this.m_localXAxis1);
      var v1 = bA.m_linearVelocity;
      var v2 = bB.m_linearVelocity;
      var w1 = bA.m_angularVelocity;
      var w2 = bB.m_angularVelocity;
      var speed = (dX * ((-w1 * axis.y)) + dY * (w1 * axis.x)) + (axis.x * (((v2.x + ((-w2 * r2Y))) - v1.x) - ((-w1 * r1Y))) + axis.y * (((v2.y + (w2 * r2X)) - v1.y) - (w1 * r1X)));
      return speed;
   }
   b2LineJoint.prototype.IsLimitEnabled = function () {
      return this.m_enableLimit;
   }
   b2LineJoint.prototype.EnableLimit = function (flag) {
      this.m_bodyA.SetAwake(true);
      this.m_bodyB.SetAwake(true);
      this.m_enableLimit = flag;
   }
   b2LineJoint.prototype.GetLowerLimit = function () {
      return this.m_lowerTranslation;
   }
   b2LineJoint.prototype.GetUpperLimit = function () {
      return this.m_upperTranslation;
   }
   b2LineJoint.prototype.SetLimits = function (lower, upper) {
      if (lower === undefined) lower = 0;
      if (upper === undefined) upper = 0;
      this.m_bodyA.SetAwake(true);
      this.m_bodyB.SetAwake(true);
      this.m_lowerTranslation = lower;
      this.m_upperTranslation = upper;
   }
   b2LineJoint.prototype.IsMotorEnabled = function () {
      return this.m_enableMotor;
   }
   b2LineJoint.prototype.EnableMotor = function (flag) {
      this.m_bodyA.SetAwake(true);
      this.m_bodyB.SetAwake(true);
      this.m_enableMotor = flag;
   }
   b2LineJoint.prototype.SetMotorSpeed = function (speed) {
      if (speed === undefined) speed = 0;
      this.m_bodyA.SetAwake(true);
      this.m_bodyB.SetAwake(true);
      this.m_motorSpeed = speed;
   }
   b2LineJoint.prototype.GetMotorSpeed = function () {
      return this.m_motorSpeed;
   }
   b2LineJoint.prototype.SetMaxMotorForce = function (force) {
      if (force === undefined) force = 0;
      this.m_bodyA.SetAwake(true);
      this.m_bodyB.SetAwake(true);
      this.m_maxMotorForce = force;
   }
   b2LineJoint.prototype.GetMaxMotorForce = function () {
      return this.m_maxMotorForce;
   }
   b2LineJoint.prototype.GetMotorForce = function () {
      return this.m_motorImpulse;
   }
   b2LineJoint.prototype.b2LineJoint = function (def) {
      this.__super.b2Joint.call(this, def);
      var tMat;
      var tX = 0;
      var tY = 0;
      this.m_localAnchor1.SetV(def.localAnchorA);
      this.m_localAnchor2.SetV(def.localAnchorB);
      this.m_localXAxis1.SetV(def.localAxisA);
      this.m_localYAxis1.x = (-this.m_localXAxis1.y);
      this.m_localYAxis1.y = this.m_localXAxis1.x;
      this.m_impulse.SetZero();
      this.m_motorMass = 0.0;
      this.m_motorImpulse = 0.0;
      this.m_lowerTranslation = def.lowerTranslation;
      this.m_upperTranslation = def.upperTranslation;
      this.m_maxMotorForce = def.maxMotorForce;
      this.m_motorSpeed = def.motorSpeed;
      this.m_enableLimit = def.enableLimit;
      this.m_enableMotor = def.enableMotor;
      this.m_limitState = b2Joint.e_inactiveLimit;
      this.m_axis.SetZero();
      this.m_perp.SetZero();
   }
   b2LineJoint.prototype.InitVelocityConstraints = function (step) {
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var tMat;
      var tX = 0;
      this.m_localCenterA.SetV(bA.GetLocalCenter());
      this.m_localCenterB.SetV(bB.GetLocalCenter());
      var xf1 = bA.GetTransform();
      var xf2 = bB.GetTransform();
      tMat = bA.m_xf.R;
      var r1X = this.m_localAnchor1.x - this.m_localCenterA.x;
      var r1Y = this.m_localAnchor1.y - this.m_localCenterA.y;
      tX = (tMat.col1.x * r1X + tMat.col2.x * r1Y);
      r1Y = (tMat.col1.y * r1X + tMat.col2.y * r1Y);
      r1X = tX;
      tMat = bB.m_xf.R;
      var r2X = this.m_localAnchor2.x - this.m_localCenterB.x;
      var r2Y = this.m_localAnchor2.y - this.m_localCenterB.y;
      tX = (tMat.col1.x * r2X + tMat.col2.x * r2Y);
      r2Y = (tMat.col1.y * r2X + tMat.col2.y * r2Y);
      r2X = tX;
      var dX = bB.m_sweep.c.x + r2X - bA.m_sweep.c.x - r1X;
      var dY = bB.m_sweep.c.y + r2Y - bA.m_sweep.c.y - r1Y;
      this.m_invMassA = bA.m_invMass;
      this.m_invMassB = bB.m_invMass;
      this.m_invIA = bA.m_invI;
      this.m_invIB = bB.m_invI; {
         this.m_axis.SetV(b2Math.MulMV(xf1.R, this.m_localXAxis1));
         this.m_a1 = (dX + r1X) * this.m_axis.y - (dY + r1Y) * this.m_axis.x;
         this.m_a2 = r2X * this.m_axis.y - r2Y * this.m_axis.x;
         this.m_motorMass = this.m_invMassA + this.m_invMassB + this.m_invIA * this.m_a1 * this.m_a1 + this.m_invIB * this.m_a2 * this.m_a2;
         this.m_motorMass = this.m_motorMass > Number.MIN_VALUE ? 1.0 / this.m_motorMass : 0.0;
      } {
         this.m_perp.SetV(b2Math.MulMV(xf1.R, this.m_localYAxis1));
         this.m_s1 = (dX + r1X) * this.m_perp.y - (dY + r1Y) * this.m_perp.x;
         this.m_s2 = r2X * this.m_perp.y - r2Y * this.m_perp.x;
         var m1 = this.m_invMassA;
         var m2 = this.m_invMassB;
         var i1 = this.m_invIA;
         var i2 = this.m_invIB;
         this.m_K.col1.x = m1 + m2 + i1 * this.m_s1 * this.m_s1 + i2 * this.m_s2 * this.m_s2;
         this.m_K.col1.y = i1 * this.m_s1 * this.m_a1 + i2 * this.m_s2 * this.m_a2;
         this.m_K.col2.x = this.m_K.col1.y;
         this.m_K.col2.y = m1 + m2 + i1 * this.m_a1 * this.m_a1 + i2 * this.m_a2 * this.m_a2;
      }
      if (this.m_enableLimit) {
         var jointTransition = this.m_axis.x * dX + this.m_axis.y * dY;
         if (b2Math.Abs(this.m_upperTranslation - this.m_lowerTranslation) < 2.0 * b2Settings.b2_linearSlop) {
            this.m_limitState = b2Joint.e_equalLimits;
         }
         else if (jointTransition <= this.m_lowerTranslation) {
            if (this.m_limitState != b2Joint.e_atLowerLimit) {
               this.m_limitState = b2Joint.e_atLowerLimit;
               this.m_impulse.y = 0.0;
            }
         }
         else if (jointTransition >= this.m_upperTranslation) {
            if (this.m_limitState != b2Joint.e_atUpperLimit) {
               this.m_limitState = b2Joint.e_atUpperLimit;
               this.m_impulse.y = 0.0;
            }
         }
         else {
            this.m_limitState = b2Joint.e_inactiveLimit;
            this.m_impulse.y = 0.0;
         }
      }
      else {
         this.m_limitState = b2Joint.e_inactiveLimit;
      }
      if (this.m_enableMotor == false) {
         this.m_motorImpulse = 0.0;
      }
      if (step.warmStarting) {
         this.m_impulse.x *= step.dtRatio;
         this.m_impulse.y *= step.dtRatio;
         this.m_motorImpulse *= step.dtRatio;
         var PX = this.m_impulse.x * this.m_perp.x + (this.m_motorImpulse + this.m_impulse.y) * this.m_axis.x;
         var PY = this.m_impulse.x * this.m_perp.y + (this.m_motorImpulse + this.m_impulse.y) * this.m_axis.y;
         var L1 = this.m_impulse.x * this.m_s1 + (this.m_motorImpulse + this.m_impulse.y) * this.m_a1;
         var L2 = this.m_impulse.x * this.m_s2 + (this.m_motorImpulse + this.m_impulse.y) * this.m_a2;
         bA.m_linearVelocity.x -= this.m_invMassA * PX;
         bA.m_linearVelocity.y -= this.m_invMassA * PY;
         bA.m_angularVelocity -= this.m_invIA * L1;
         bB.m_linearVelocity.x += this.m_invMassB * PX;
         bB.m_linearVelocity.y += this.m_invMassB * PY;
         bB.m_angularVelocity += this.m_invIB * L2;
      }
      else {
         this.m_impulse.SetZero();
         this.m_motorImpulse = 0.0;
      }
   }
   b2LineJoint.prototype.SolveVelocityConstraints = function (step) {
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var v1 = bA.m_linearVelocity;
      var w1 = bA.m_angularVelocity;
      var v2 = bB.m_linearVelocity;
      var w2 = bB.m_angularVelocity;
      var PX = 0;
      var PY = 0;
      var L1 = 0;
      var L2 = 0;
      if (this.m_enableMotor && this.m_limitState != b2Joint.e_equalLimits) {
         var Cdot = this.m_axis.x * (v2.x - v1.x) + this.m_axis.y * (v2.y - v1.y) + this.m_a2 * w2 - this.m_a1 * w1;
         var impulse = this.m_motorMass * (this.m_motorSpeed - Cdot);
         var oldImpulse = this.m_motorImpulse;
         var maxImpulse = step.dt * this.m_maxMotorForce;
         this.m_motorImpulse = b2Math.Clamp(this.m_motorImpulse + impulse, (-maxImpulse), maxImpulse);
         impulse = this.m_motorImpulse - oldImpulse;
         PX = impulse * this.m_axis.x;
         PY = impulse * this.m_axis.y;
         L1 = impulse * this.m_a1;
         L2 = impulse * this.m_a2;
         v1.x -= this.m_invMassA * PX;
         v1.y -= this.m_invMassA * PY;
         w1 -= this.m_invIA * L1;
         v2.x += this.m_invMassB * PX;
         v2.y += this.m_invMassB * PY;
         w2 += this.m_invIB * L2;
      }
      var Cdot1 = this.m_perp.x * (v2.x - v1.x) + this.m_perp.y * (v2.y - v1.y) + this.m_s2 * w2 - this.m_s1 * w1;
      if (this.m_enableLimit && this.m_limitState != b2Joint.e_inactiveLimit) {
         var Cdot2 = this.m_axis.x * (v2.x - v1.x) + this.m_axis.y * (v2.y - v1.y) + this.m_a2 * w2 - this.m_a1 * w1;
         var f1 = this.m_impulse.Copy();
         var df = this.m_K.Solve(new b2Vec2(), (-Cdot1), (-Cdot2));
         this.m_impulse.Add(df);
         if (this.m_limitState == b2Joint.e_atLowerLimit) {
            this.m_impulse.y = b2Math.Max(this.m_impulse.y, 0.0);
         }
         else if (this.m_limitState == b2Joint.e_atUpperLimit) {
            this.m_impulse.y = b2Math.Min(this.m_impulse.y, 0.0);
         }
         var b = (-Cdot1) - (this.m_impulse.y - f1.y) * this.m_K.col2.x;
         var f2r = 0;
         if (this.m_K.col1.x != 0.0) {
            f2r = b / this.m_K.col1.x + f1.x;
         }
         else {
            f2r = f1.x;
         }
         this.m_impulse.x = f2r;
         df.x = this.m_impulse.x - f1.x;
         df.y = this.m_impulse.y - f1.y;
         PX = df.x * this.m_perp.x + df.y * this.m_axis.x;
         PY = df.x * this.m_perp.y + df.y * this.m_axis.y;
         L1 = df.x * this.m_s1 + df.y * this.m_a1;
         L2 = df.x * this.m_s2 + df.y * this.m_a2;
         v1.x -= this.m_invMassA * PX;
         v1.y -= this.m_invMassA * PY;
         w1 -= this.m_invIA * L1;
         v2.x += this.m_invMassB * PX;
         v2.y += this.m_invMassB * PY;
         w2 += this.m_invIB * L2;
      }
      else {
         var df2 = 0;
         if (this.m_K.col1.x != 0.0) {
            df2 = ((-Cdot1)) / this.m_K.col1.x;
         }
         else {
            df2 = 0.0;
         }
         this.m_impulse.x += df2;
         PX = df2 * this.m_perp.x;
         PY = df2 * this.m_perp.y;
         L1 = df2 * this.m_s1;
         L2 = df2 * this.m_s2;
         v1.x -= this.m_invMassA * PX;
         v1.y -= this.m_invMassA * PY;
         w1 -= this.m_invIA * L1;
         v2.x += this.m_invMassB * PX;
         v2.y += this.m_invMassB * PY;
         w2 += this.m_invIB * L2;
      }
      bA.m_linearVelocity.SetV(v1);
      bA.m_angularVelocity = w1;
      bB.m_linearVelocity.SetV(v2);
      bB.m_angularVelocity = w2;
   }
   b2LineJoint.prototype.SolvePositionConstraints = function (baumgarte) {
      if (baumgarte === undefined) baumgarte = 0;
      var limitC = 0;
      var oldLimitImpulse = 0;
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var c1 = bA.m_sweep.c;
      var a1 = bA.m_sweep.a;
      var c2 = bB.m_sweep.c;
      var a2 = bB.m_sweep.a;
      var tMat;
      var tX = 0;
      var m1 = 0;
      var m2 = 0;
      var i1 = 0;
      var i2 = 0;
      var linearError = 0.0;
      var angularError = 0.0;
      var active = false;
      var C2 = 0.0;
      var R1 = b2Mat22.FromAngle(a1);
      var R2 = b2Mat22.FromAngle(a2);
      tMat = R1;
      var r1X = this.m_localAnchor1.x - this.m_localCenterA.x;
      var r1Y = this.m_localAnchor1.y - this.m_localCenterA.y;
      tX = (tMat.col1.x * r1X + tMat.col2.x * r1Y);
      r1Y = (tMat.col1.y * r1X + tMat.col2.y * r1Y);
      r1X = tX;
      tMat = R2;
      var r2X = this.m_localAnchor2.x - this.m_localCenterB.x;
      var r2Y = this.m_localAnchor2.y - this.m_localCenterB.y;
      tX = (tMat.col1.x * r2X + tMat.col2.x * r2Y);
      r2Y = (tMat.col1.y * r2X + tMat.col2.y * r2Y);
      r2X = tX;
      var dX = c2.x + r2X - c1.x - r1X;
      var dY = c2.y + r2Y - c1.y - r1Y;
      if (this.m_enableLimit) {
         this.m_axis = b2Math.MulMV(R1, this.m_localXAxis1);
         this.m_a1 = (dX + r1X) * this.m_axis.y - (dY + r1Y) * this.m_axis.x;
         this.m_a2 = r2X * this.m_axis.y - r2Y * this.m_axis.x;
         var translation = this.m_axis.x * dX + this.m_axis.y * dY;
         if (b2Math.Abs(this.m_upperTranslation - this.m_lowerTranslation) < 2.0 * b2Settings.b2_linearSlop) {
            C2 = b2Math.Clamp(translation, (-b2Settings.b2_maxLinearCorrection), b2Settings.b2_maxLinearCorrection);
            linearError = b2Math.Abs(translation);
            active = true;
         }
         else if (translation <= this.m_lowerTranslation) {
            C2 = b2Math.Clamp(translation - this.m_lowerTranslation + b2Settings.b2_linearSlop, (-b2Settings.b2_maxLinearCorrection), 0.0);
            linearError = this.m_lowerTranslation - translation;
            active = true;
         }
         else if (translation >= this.m_upperTranslation) {
            C2 = b2Math.Clamp(translation - this.m_upperTranslation + b2Settings.b2_linearSlop, 0.0, b2Settings.b2_maxLinearCorrection);
            linearError = translation - this.m_upperTranslation;
            active = true;
         }
      }
      this.m_perp = b2Math.MulMV(R1, this.m_localYAxis1);
      this.m_s1 = (dX + r1X) * this.m_perp.y - (dY + r1Y) * this.m_perp.x;
      this.m_s2 = r2X * this.m_perp.y - r2Y * this.m_perp.x;
      var impulse = new b2Vec2();
      var C1 = this.m_perp.x * dX + this.m_perp.y * dY;
      linearError = b2Math.Max(linearError, b2Math.Abs(C1));
      angularError = 0.0;
      if (active) {
         m1 = this.m_invMassA;
         m2 = this.m_invMassB;
         i1 = this.m_invIA;
         i2 = this.m_invIB;
         this.m_K.col1.x = m1 + m2 + i1 * this.m_s1 * this.m_s1 + i2 * this.m_s2 * this.m_s2;
         this.m_K.col1.y = i1 * this.m_s1 * this.m_a1 + i2 * this.m_s2 * this.m_a2;
         this.m_K.col2.x = this.m_K.col1.y;
         this.m_K.col2.y = m1 + m2 + i1 * this.m_a1 * this.m_a1 + i2 * this.m_a2 * this.m_a2;
         this.m_K.Solve(impulse, (-C1), (-C2));
      }
      else {
         m1 = this.m_invMassA;
         m2 = this.m_invMassB;
         i1 = this.m_invIA;
         i2 = this.m_invIB;
         var k11 = m1 + m2 + i1 * this.m_s1 * this.m_s1 + i2 * this.m_s2 * this.m_s2;
         var impulse1 = 0;
         if (k11 != 0.0) {
            impulse1 = ((-C1)) / k11;
         }
         else {
            impulse1 = 0.0;
         }
         impulse.x = impulse1;
         impulse.y = 0.0;
      }
      var PX = impulse.x * this.m_perp.x + impulse.y * this.m_axis.x;
      var PY = impulse.x * this.m_perp.y + impulse.y * this.m_axis.y;
      var L1 = impulse.x * this.m_s1 + impulse.y * this.m_a1;
      var L2 = impulse.x * this.m_s2 + impulse.y * this.m_a2;
      c1.x -= this.m_invMassA * PX;
      c1.y -= this.m_invMassA * PY;
      a1 -= this.m_invIA * L1;
      c2.x += this.m_invMassB * PX;
      c2.y += this.m_invMassB * PY;
      a2 += this.m_invIB * L2;
      bA.m_sweep.a = a1;
      bB.m_sweep.a = a2;
      bA.SynchronizeTransform();
      bB.SynchronizeTransform();
      return linearError <= b2Settings.b2_linearSlop && angularError <= b2Settings.b2_angularSlop;
   }
   Box2D.inherit(b2LineJointDef, Box2D.Dynamics.Joints.b2JointDef);
   b2LineJointDef.prototype.__super = Box2D.Dynamics.Joints.b2JointDef.prototype;
   b2LineJointDef.b2LineJointDef = function () {
      Box2D.Dynamics.Joints.b2JointDef.b2JointDef.apply(this, arguments);
      this.localAnchorA = new b2Vec2();
      this.localAnchorB = new b2Vec2();
      this.localAxisA = new b2Vec2();
   };
   b2LineJointDef.prototype.b2LineJointDef = function () {
      this.__super.b2JointDef.call(this);
      this.type = b2Joint.e_lineJoint;
      this.localAxisA.Set(1.0, 0.0);
      this.enableLimit = false;
      this.lowerTranslation = 0.0;
      this.upperTranslation = 0.0;
      this.enableMotor = false;
      this.maxMotorForce = 0.0;
      this.motorSpeed = 0.0;
   }
   b2LineJointDef.prototype.Initialize = function (bA, bB, anchor, axis) {
      this.bodyA = bA;
      this.bodyB = bB;
      this.localAnchorA = this.bodyA.GetLocalPoint(anchor);
      this.localAnchorB = this.bodyB.GetLocalPoint(anchor);
      this.localAxisA = this.bodyA.GetLocalVector(axis);
   }
   Box2D.inherit(b2MouseJoint, Box2D.Dynamics.Joints.b2Joint);
   b2MouseJoint.prototype.__super = Box2D.Dynamics.Joints.b2Joint.prototype;
   b2MouseJoint.b2MouseJoint = function () {
      Box2D.Dynamics.Joints.b2Joint.b2Joint.apply(this, arguments);
      this.K = new b2Mat22();
      this.K1 = new b2Mat22();
      this.K2 = new b2Mat22();
      this.m_localAnchor = new b2Vec2();
      this.m_target = new b2Vec2();
      this.m_impulse = new b2Vec2();
      this.m_mass = new b2Mat22();
      this.m_C = new b2Vec2();
   };
   b2MouseJoint.prototype.GetAnchorA = function () {
      return this.m_target;
   }
   b2MouseJoint.prototype.GetAnchorB = function () {
      return this.m_bodyB.GetWorldPoint(this.m_localAnchor);
   }
   b2MouseJoint.prototype.GetReactionForce = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return new b2Vec2(inv_dt * this.m_impulse.x, inv_dt * this.m_impulse.y);
   }
   b2MouseJoint.prototype.GetReactionTorque = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return 0.0;
   }
   b2MouseJoint.prototype.GetTarget = function () {
      return this.m_target;
   }
   b2MouseJoint.prototype.SetTarget = function (target) {
      if (this.m_bodyB.IsAwake() == false) {
         this.m_bodyB.SetAwake(true);
      }
      this.m_target = target;
   }
   b2MouseJoint.prototype.GetMaxForce = function () {
      return this.m_maxForce;
   }
   b2MouseJoint.prototype.SetMaxForce = function (maxForce) {
      if (maxForce === undefined) maxForce = 0;
      this.m_maxForce = maxForce;
   }
   b2MouseJoint.prototype.GetFrequency = function () {
      return this.m_frequencyHz;
   }
   b2MouseJoint.prototype.SetFrequency = function (hz) {
      if (hz === undefined) hz = 0;
      this.m_frequencyHz = hz;
   }
   b2MouseJoint.prototype.GetDampingRatio = function () {
      return this.m_dampingRatio;
   }
   b2MouseJoint.prototype.SetDampingRatio = function (ratio) {
      if (ratio === undefined) ratio = 0;
      this.m_dampingRatio = ratio;
   }
   b2MouseJoint.prototype.b2MouseJoint = function (def) {
      this.__super.b2Joint.call(this, def);
      this.m_target.SetV(def.target);
      var tX = this.m_target.x - this.m_bodyB.m_xf.position.x;
      var tY = this.m_target.y - this.m_bodyB.m_xf.position.y;
      var tMat = this.m_bodyB.m_xf.R;
      this.m_localAnchor.x = (tX * tMat.col1.x + tY * tMat.col1.y);
      this.m_localAnchor.y = (tX * tMat.col2.x + tY * tMat.col2.y);
      this.m_maxForce = def.maxForce;
      this.m_impulse.SetZero();
      this.m_frequencyHz = def.frequencyHz;
      this.m_dampingRatio = def.dampingRatio;
      this.m_beta = 0.0;
      this.m_gamma = 0.0;
   }
   b2MouseJoint.prototype.InitVelocityConstraints = function (step) {
      var b = this.m_bodyB;
      var mass = b.GetMass();
      var omega = 2.0 * Math.PI * this.m_frequencyHz;
      var d = 2.0 * mass * this.m_dampingRatio * omega;
      var k = mass * omega * omega;
      this.m_gamma = step.dt * (d + step.dt * k);
      this.m_gamma = this.m_gamma != 0 ? 1 / this.m_gamma : 0.0;
      this.m_beta = step.dt * k * this.m_gamma;
      var tMat;tMat = b.m_xf.R;
      var rX = this.m_localAnchor.x - b.m_sweep.localCenter.x;
      var rY = this.m_localAnchor.y - b.m_sweep.localCenter.y;
      var tX = (tMat.col1.x * rX + tMat.col2.x * rY);rY = (tMat.col1.y * rX + tMat.col2.y * rY);
      rX = tX;
      var invMass = b.m_invMass;
      var invI = b.m_invI;this.K1.col1.x = invMass;
      this.K1.col2.x = 0.0;
      this.K1.col1.y = 0.0;
      this.K1.col2.y = invMass;
      this.K2.col1.x = invI * rY * rY;
      this.K2.col2.x = (-invI * rX * rY);
      this.K2.col1.y = (-invI * rX * rY);
      this.K2.col2.y = invI * rX * rX;
      this.K.SetM(this.K1);
      this.K.AddM(this.K2);
      this.K.col1.x += this.m_gamma;
      this.K.col2.y += this.m_gamma;
      this.K.GetInverse(this.m_mass);
      this.m_C.x = b.m_sweep.c.x + rX - this.m_target.x;
      this.m_C.y = b.m_sweep.c.y + rY - this.m_target.y;
      b.m_angularVelocity *= 0.98;
      this.m_impulse.x *= step.dtRatio;
      this.m_impulse.y *= step.dtRatio;
      b.m_linearVelocity.x += invMass * this.m_impulse.x;
      b.m_linearVelocity.y += invMass * this.m_impulse.y;
      b.m_angularVelocity += invI * (rX * this.m_impulse.y - rY * this.m_impulse.x);
   }
   b2MouseJoint.prototype.SolveVelocityConstraints = function (step) {
      var b = this.m_bodyB;
      var tMat;
      var tX = 0;
      var tY = 0;
      tMat = b.m_xf.R;
      var rX = this.m_localAnchor.x - b.m_sweep.localCenter.x;
      var rY = this.m_localAnchor.y - b.m_sweep.localCenter.y;
      tX = (tMat.col1.x * rX + tMat.col2.x * rY);
      rY = (tMat.col1.y * rX + tMat.col2.y * rY);
      rX = tX;
      var CdotX = b.m_linearVelocity.x + ((-b.m_angularVelocity * rY));
      var CdotY = b.m_linearVelocity.y + (b.m_angularVelocity * rX);
      tMat = this.m_mass;
      tX = CdotX + this.m_beta * this.m_C.x + this.m_gamma * this.m_impulse.x;
      tY = CdotY + this.m_beta * this.m_C.y + this.m_gamma * this.m_impulse.y;
      var impulseX = (-(tMat.col1.x * tX + tMat.col2.x * tY));
      var impulseY = (-(tMat.col1.y * tX + tMat.col2.y * tY));
      var oldImpulseX = this.m_impulse.x;
      var oldImpulseY = this.m_impulse.y;
      this.m_impulse.x += impulseX;
      this.m_impulse.y += impulseY;
      var maxImpulse = step.dt * this.m_maxForce;
      if (this.m_impulse.LengthSquared() > maxImpulse * maxImpulse) {
         this.m_impulse.Multiply(maxImpulse / this.m_impulse.Length());
      }
      impulseX = this.m_impulse.x - oldImpulseX;
      impulseY = this.m_impulse.y - oldImpulseY;
      b.m_linearVelocity.x += b.m_invMass * impulseX;
      b.m_linearVelocity.y += b.m_invMass * impulseY;
      b.m_angularVelocity += b.m_invI * (rX * impulseY - rY * impulseX);
   }
   b2MouseJoint.prototype.SolvePositionConstraints = function (baumgarte) {
      if (baumgarte === undefined) baumgarte = 0;
      return true;
   }
   Box2D.inherit(b2MouseJointDef, Box2D.Dynamics.Joints.b2JointDef);
   b2MouseJointDef.prototype.__super = Box2D.Dynamics.Joints.b2JointDef.prototype;
   b2MouseJointDef.b2MouseJointDef = function () {
      Box2D.Dynamics.Joints.b2JointDef.b2JointDef.apply(this, arguments);
      this.target = new b2Vec2();
   };
   b2MouseJointDef.prototype.b2MouseJointDef = function () {
      this.__super.b2JointDef.call(this);
      this.type = b2Joint.e_mouseJoint;
      this.maxForce = 0.0;
      this.frequencyHz = 5.0;
      this.dampingRatio = 0.7;
   }
   Box2D.inherit(b2PrismaticJoint, Box2D.Dynamics.Joints.b2Joint);
   b2PrismaticJoint.prototype.__super = Box2D.Dynamics.Joints.b2Joint.prototype;
   b2PrismaticJoint.b2PrismaticJoint = function () {
      Box2D.Dynamics.Joints.b2Joint.b2Joint.apply(this, arguments);
      this.m_localAnchor1 = new b2Vec2();
      this.m_localAnchor2 = new b2Vec2();
      this.m_localXAxis1 = new b2Vec2();
      this.m_localYAxis1 = new b2Vec2();
      this.m_axis = new b2Vec2();
      this.m_perp = new b2Vec2();
      this.m_K = new b2Mat33();
      this.m_impulse = new b2Vec3();
   };
   b2PrismaticJoint.prototype.GetAnchorA = function () {
      return this.m_bodyA.GetWorldPoint(this.m_localAnchor1);
   }
   b2PrismaticJoint.prototype.GetAnchorB = function () {
      return this.m_bodyB.GetWorldPoint(this.m_localAnchor2);
   }
   b2PrismaticJoint.prototype.GetReactionForce = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return new b2Vec2(inv_dt * (this.m_impulse.x * this.m_perp.x + (this.m_motorImpulse + this.m_impulse.z) * this.m_axis.x), inv_dt * (this.m_impulse.x * this.m_perp.y + (this.m_motorImpulse + this.m_impulse.z) * this.m_axis.y));
   }
   b2PrismaticJoint.prototype.GetReactionTorque = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return inv_dt * this.m_impulse.y;
   }
   b2PrismaticJoint.prototype.GetJointTranslation = function () {
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var tMat;
      var p1 = bA.GetWorldPoint(this.m_localAnchor1);
      var p2 = bB.GetWorldPoint(this.m_localAnchor2);
      var dX = p2.x - p1.x;
      var dY = p2.y - p1.y;
      var axis = bA.GetWorldVector(this.m_localXAxis1);
      var translation = axis.x * dX + axis.y * dY;
      return translation;
   }
   b2PrismaticJoint.prototype.GetJointSpeed = function () {
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var tMat;
      tMat = bA.m_xf.R;
      var r1X = this.m_localAnchor1.x - bA.m_sweep.localCenter.x;
      var r1Y = this.m_localAnchor1.y - bA.m_sweep.localCenter.y;
      var tX = (tMat.col1.x * r1X + tMat.col2.x * r1Y);
      r1Y = (tMat.col1.y * r1X + tMat.col2.y * r1Y);
      r1X = tX;
      tMat = bB.m_xf.R;
      var r2X = this.m_localAnchor2.x - bB.m_sweep.localCenter.x;
      var r2Y = this.m_localAnchor2.y - bB.m_sweep.localCenter.y;
      tX = (tMat.col1.x * r2X + tMat.col2.x * r2Y);
      r2Y = (tMat.col1.y * r2X + tMat.col2.y * r2Y);
      r2X = tX;
      var p1X = bA.m_sweep.c.x + r1X;
      var p1Y = bA.m_sweep.c.y + r1Y;
      var p2X = bB.m_sweep.c.x + r2X;
      var p2Y = bB.m_sweep.c.y + r2Y;
      var dX = p2X - p1X;
      var dY = p2Y - p1Y;
      var axis = bA.GetWorldVector(this.m_localXAxis1);
      var v1 = bA.m_linearVelocity;
      var v2 = bB.m_linearVelocity;
      var w1 = bA.m_angularVelocity;
      var w2 = bB.m_angularVelocity;
      var speed = (dX * ((-w1 * axis.y)) + dY * (w1 * axis.x)) + (axis.x * (((v2.x + ((-w2 * r2Y))) - v1.x) - ((-w1 * r1Y))) + axis.y * (((v2.y + (w2 * r2X)) - v1.y) - (w1 * r1X)));
      return speed;
   }
   b2PrismaticJoint.prototype.IsLimitEnabled = function () {
      return this.m_enableLimit;
   }
   b2PrismaticJoint.prototype.EnableLimit = function (flag) {
      this.m_bodyA.SetAwake(true);
      this.m_bodyB.SetAwake(true);
      this.m_enableLimit = flag;
   }
   b2PrismaticJoint.prototype.GetLowerLimit = function () {
      return this.m_lowerTranslation;
   }
   b2PrismaticJoint.prototype.GetUpperLimit = function () {
      return this.m_upperTranslation;
   }
   b2PrismaticJoint.prototype.SetLimits = function (lower, upper) {
      if (lower === undefined) lower = 0;
      if (upper === undefined) upper = 0;
      this.m_bodyA.SetAwake(true);
      this.m_bodyB.SetAwake(true);
      this.m_lowerTranslation = lower;
      this.m_upperTranslation = upper;
   }
   b2PrismaticJoint.prototype.IsMotorEnabled = function () {
      return this.m_enableMotor;
   }
   b2PrismaticJoint.prototype.EnableMotor = function (flag) {
      this.m_bodyA.SetAwake(true);
      this.m_bodyB.SetAwake(true);
      this.m_enableMotor = flag;
   }
   b2PrismaticJoint.prototype.SetMotorSpeed = function (speed) {
      if (speed === undefined) speed = 0;
      this.m_bodyA.SetAwake(true);
      this.m_bodyB.SetAwake(true);
      this.m_motorSpeed = speed;
   }
   b2PrismaticJoint.prototype.GetMotorSpeed = function () {
      return this.m_motorSpeed;
   }
   b2PrismaticJoint.prototype.SetMaxMotorForce = function (force) {
      if (force === undefined) force = 0;
      this.m_bodyA.SetAwake(true);
      this.m_bodyB.SetAwake(true);
      this.m_maxMotorForce = force;
   }
   b2PrismaticJoint.prototype.GetMotorForce = function () {
      return this.m_motorImpulse;
   }
   b2PrismaticJoint.prototype.b2PrismaticJoint = function (def) {
      this.__super.b2Joint.call(this, def);
      var tMat;
      var tX = 0;
      var tY = 0;
      this.m_localAnchor1.SetV(def.localAnchorA);
      this.m_localAnchor2.SetV(def.localAnchorB);
      this.m_localXAxis1.SetV(def.localAxisA);
      this.m_localYAxis1.x = (-this.m_localXAxis1.y);
      this.m_localYAxis1.y = this.m_localXAxis1.x;
      this.m_refAngle = def.referenceAngle;
      this.m_impulse.SetZero();
      this.m_motorMass = 0.0;
      this.m_motorImpulse = 0.0;
      this.m_lowerTranslation = def.lowerTranslation;
      this.m_upperTranslation = def.upperTranslation;
      this.m_maxMotorForce = def.maxMotorForce;
      this.m_motorSpeed = def.motorSpeed;
      this.m_enableLimit = def.enableLimit;
      this.m_enableMotor = def.enableMotor;
      this.m_limitState = b2Joint.e_inactiveLimit;
      this.m_axis.SetZero();
      this.m_perp.SetZero();
   }
   b2PrismaticJoint.prototype.InitVelocityConstraints = function (step) {
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var tMat;
      var tX = 0;
      this.m_localCenterA.SetV(bA.GetLocalCenter());
      this.m_localCenterB.SetV(bB.GetLocalCenter());
      var xf1 = bA.GetTransform();
      var xf2 = bB.GetTransform();
      tMat = bA.m_xf.R;
      var r1X = this.m_localAnchor1.x - this.m_localCenterA.x;
      var r1Y = this.m_localAnchor1.y - this.m_localCenterA.y;
      tX = (tMat.col1.x * r1X + tMat.col2.x * r1Y);
      r1Y = (tMat.col1.y * r1X + tMat.col2.y * r1Y);
      r1X = tX;
      tMat = bB.m_xf.R;
      var r2X = this.m_localAnchor2.x - this.m_localCenterB.x;
      var r2Y = this.m_localAnchor2.y - this.m_localCenterB.y;
      tX = (tMat.col1.x * r2X + tMat.col2.x * r2Y);
      r2Y = (tMat.col1.y * r2X + tMat.col2.y * r2Y);
      r2X = tX;
      var dX = bB.m_sweep.c.x + r2X - bA.m_sweep.c.x - r1X;
      var dY = bB.m_sweep.c.y + r2Y - bA.m_sweep.c.y - r1Y;
      this.m_invMassA = bA.m_invMass;
      this.m_invMassB = bB.m_invMass;
      this.m_invIA = bA.m_invI;
      this.m_invIB = bB.m_invI; {
         this.m_axis.SetV(b2Math.MulMV(xf1.R, this.m_localXAxis1));
         this.m_a1 = (dX + r1X) * this.m_axis.y - (dY + r1Y) * this.m_axis.x;
         this.m_a2 = r2X * this.m_axis.y - r2Y * this.m_axis.x;
         this.m_motorMass = this.m_invMassA + this.m_invMassB + this.m_invIA * this.m_a1 * this.m_a1 + this.m_invIB * this.m_a2 * this.m_a2;
         if (this.m_motorMass > Number.MIN_VALUE) this.m_motorMass = 1.0 / this.m_motorMass;
      } {
         this.m_perp.SetV(b2Math.MulMV(xf1.R, this.m_localYAxis1));
         this.m_s1 = (dX + r1X) * this.m_perp.y - (dY + r1Y) * this.m_perp.x;
         this.m_s2 = r2X * this.m_perp.y - r2Y * this.m_perp.x;
         var m1 = this.m_invMassA;
         var m2 = this.m_invMassB;
         var i1 = this.m_invIA;
         var i2 = this.m_invIB;
         this.m_K.col1.x = m1 + m2 + i1 * this.m_s1 * this.m_s1 + i2 * this.m_s2 * this.m_s2;
         this.m_K.col1.y = i1 * this.m_s1 + i2 * this.m_s2;
         this.m_K.col1.z = i1 * this.m_s1 * this.m_a1 + i2 * this.m_s2 * this.m_a2;
         this.m_K.col2.x = this.m_K.col1.y;
         this.m_K.col2.y = i1 + i2;
         this.m_K.col2.z = i1 * this.m_a1 + i2 * this.m_a2;
         this.m_K.col3.x = this.m_K.col1.z;
         this.m_K.col3.y = this.m_K.col2.z;
         this.m_K.col3.z = m1 + m2 + i1 * this.m_a1 * this.m_a1 + i2 * this.m_a2 * this.m_a2;
      }
      if (this.m_enableLimit) {
         var jointTransition = this.m_axis.x * dX + this.m_axis.y * dY;
         if (b2Math.Abs(this.m_upperTranslation - this.m_lowerTranslation) < 2.0 * b2Settings.b2_linearSlop) {
            this.m_limitState = b2Joint.e_equalLimits;
         }
         else if (jointTransition <= this.m_lowerTranslation) {
            if (this.m_limitState != b2Joint.e_atLowerLimit) {
               this.m_limitState = b2Joint.e_atLowerLimit;
               this.m_impulse.z = 0.0;
            }
         }
         else if (jointTransition >= this.m_upperTranslation) {
            if (this.m_limitState != b2Joint.e_atUpperLimit) {
               this.m_limitState = b2Joint.e_atUpperLimit;
               this.m_impulse.z = 0.0;
            }
         }
         else {
            this.m_limitState = b2Joint.e_inactiveLimit;
            this.m_impulse.z = 0.0;
         }
      }
      else {
         this.m_limitState = b2Joint.e_inactiveLimit;
      }
      if (this.m_enableMotor == false) {
         this.m_motorImpulse = 0.0;
      }
      if (step.warmStarting) {
         this.m_impulse.x *= step.dtRatio;
         this.m_impulse.y *= step.dtRatio;
         this.m_motorImpulse *= step.dtRatio;
         var PX = this.m_impulse.x * this.m_perp.x + (this.m_motorImpulse + this.m_impulse.z) * this.m_axis.x;
         var PY = this.m_impulse.x * this.m_perp.y + (this.m_motorImpulse + this.m_impulse.z) * this.m_axis.y;
         var L1 = this.m_impulse.x * this.m_s1 + this.m_impulse.y + (this.m_motorImpulse + this.m_impulse.z) * this.m_a1;
         var L2 = this.m_impulse.x * this.m_s2 + this.m_impulse.y + (this.m_motorImpulse + this.m_impulse.z) * this.m_a2;
         bA.m_linearVelocity.x -= this.m_invMassA * PX;
         bA.m_linearVelocity.y -= this.m_invMassA * PY;
         bA.m_angularVelocity -= this.m_invIA * L1;
         bB.m_linearVelocity.x += this.m_invMassB * PX;
         bB.m_linearVelocity.y += this.m_invMassB * PY;
         bB.m_angularVelocity += this.m_invIB * L2;
      }
      else {
         this.m_impulse.SetZero();
         this.m_motorImpulse = 0.0;
      }
   }
   b2PrismaticJoint.prototype.SolveVelocityConstraints = function (step) {
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var v1 = bA.m_linearVelocity;
      var w1 = bA.m_angularVelocity;
      var v2 = bB.m_linearVelocity;
      var w2 = bB.m_angularVelocity;
      var PX = 0;
      var PY = 0;
      var L1 = 0;
      var L2 = 0;
      if (this.m_enableMotor && this.m_limitState != b2Joint.e_equalLimits) {
         var Cdot = this.m_axis.x * (v2.x - v1.x) + this.m_axis.y * (v2.y - v1.y) + this.m_a2 * w2 - this.m_a1 * w1;
         var impulse = this.m_motorMass * (this.m_motorSpeed - Cdot);
         var oldImpulse = this.m_motorImpulse;
         var maxImpulse = step.dt * this.m_maxMotorForce;
         this.m_motorImpulse = b2Math.Clamp(this.m_motorImpulse + impulse, (-maxImpulse), maxImpulse);
         impulse = this.m_motorImpulse - oldImpulse;
         PX = impulse * this.m_axis.x;
         PY = impulse * this.m_axis.y;
         L1 = impulse * this.m_a1;
         L2 = impulse * this.m_a2;
         v1.x -= this.m_invMassA * PX;
         v1.y -= this.m_invMassA * PY;
         w1 -= this.m_invIA * L1;
         v2.x += this.m_invMassB * PX;
         v2.y += this.m_invMassB * PY;
         w2 += this.m_invIB * L2;
      }
      var Cdot1X = this.m_perp.x * (v2.x - v1.x) + this.m_perp.y * (v2.y - v1.y) + this.m_s2 * w2 - this.m_s1 * w1;
      var Cdot1Y = w2 - w1;
      if (this.m_enableLimit && this.m_limitState != b2Joint.e_inactiveLimit) {
         var Cdot2 = this.m_axis.x * (v2.x - v1.x) + this.m_axis.y * (v2.y - v1.y) + this.m_a2 * w2 - this.m_a1 * w1;
         var f1 = this.m_impulse.Copy();
         var df = this.m_K.Solve33(new b2Vec3(), (-Cdot1X), (-Cdot1Y), (-Cdot2));
         this.m_impulse.Add(df);
         if (this.m_limitState == b2Joint.e_atLowerLimit) {
            this.m_impulse.z = b2Math.Max(this.m_impulse.z, 0.0);
         }
         else if (this.m_limitState == b2Joint.e_atUpperLimit) {
            this.m_impulse.z = b2Math.Min(this.m_impulse.z, 0.0);
         }
         var bX = (-Cdot1X) - (this.m_impulse.z - f1.z) * this.m_K.col3.x;
         var bY = (-Cdot1Y) - (this.m_impulse.z - f1.z) * this.m_K.col3.y;
         var f2r = this.m_K.Solve22(new b2Vec2(), bX, bY);
         f2r.x += f1.x;
         f2r.y += f1.y;
         this.m_impulse.x = f2r.x;
         this.m_impulse.y = f2r.y;
         df.x = this.m_impulse.x - f1.x;
         df.y = this.m_impulse.y - f1.y;
         df.z = this.m_impulse.z - f1.z;
         PX = df.x * this.m_perp.x + df.z * this.m_axis.x;
         PY = df.x * this.m_perp.y + df.z * this.m_axis.y;
         L1 = df.x * this.m_s1 + df.y + df.z * this.m_a1;
         L2 = df.x * this.m_s2 + df.y + df.z * this.m_a2;
         v1.x -= this.m_invMassA * PX;
         v1.y -= this.m_invMassA * PY;
         w1 -= this.m_invIA * L1;
         v2.x += this.m_invMassB * PX;
         v2.y += this.m_invMassB * PY;
         w2 += this.m_invIB * L2;
      }
      else {
         var df2 = this.m_K.Solve22(new b2Vec2(), (-Cdot1X), (-Cdot1Y));
         this.m_impulse.x += df2.x;
         this.m_impulse.y += df2.y;
         PX = df2.x * this.m_perp.x;
         PY = df2.x * this.m_perp.y;
         L1 = df2.x * this.m_s1 + df2.y;
         L2 = df2.x * this.m_s2 + df2.y;
         v1.x -= this.m_invMassA * PX;
         v1.y -= this.m_invMassA * PY;
         w1 -= this.m_invIA * L1;
         v2.x += this.m_invMassB * PX;
         v2.y += this.m_invMassB * PY;
         w2 += this.m_invIB * L2;
      }
      bA.m_linearVelocity.SetV(v1);
      bA.m_angularVelocity = w1;
      bB.m_linearVelocity.SetV(v2);
      bB.m_angularVelocity = w2;
   }
   b2PrismaticJoint.prototype.SolvePositionConstraints = function (baumgarte) {
      if (baumgarte === undefined) baumgarte = 0;
      var limitC = 0;
      var oldLimitImpulse = 0;
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var c1 = bA.m_sweep.c;
      var a1 = bA.m_sweep.a;
      var c2 = bB.m_sweep.c;
      var a2 = bB.m_sweep.a;
      var tMat;
      var tX = 0;
      var m1 = 0;
      var m2 = 0;
      var i1 = 0;
      var i2 = 0;
      var linearError = 0.0;
      var angularError = 0.0;
      var active = false;
      var C2 = 0.0;
      var R1 = b2Mat22.FromAngle(a1);
      var R2 = b2Mat22.FromAngle(a2);
      tMat = R1;
      var r1X = this.m_localAnchor1.x - this.m_localCenterA.x;
      var r1Y = this.m_localAnchor1.y - this.m_localCenterA.y;
      tX = (tMat.col1.x * r1X + tMat.col2.x * r1Y);
      r1Y = (tMat.col1.y * r1X + tMat.col2.y * r1Y);
      r1X = tX;
      tMat = R2;
      var r2X = this.m_localAnchor2.x - this.m_localCenterB.x;
      var r2Y = this.m_localAnchor2.y - this.m_localCenterB.y;
      tX = (tMat.col1.x * r2X + tMat.col2.x * r2Y);
      r2Y = (tMat.col1.y * r2X + tMat.col2.y * r2Y);
      r2X = tX;
      var dX = c2.x + r2X - c1.x - r1X;
      var dY = c2.y + r2Y - c1.y - r1Y;
      if (this.m_enableLimit) {
         this.m_axis = b2Math.MulMV(R1, this.m_localXAxis1);
         this.m_a1 = (dX + r1X) * this.m_axis.y - (dY + r1Y) * this.m_axis.x;
         this.m_a2 = r2X * this.m_axis.y - r2Y * this.m_axis.x;
         var translation = this.m_axis.x * dX + this.m_axis.y * dY;
         if (b2Math.Abs(this.m_upperTranslation - this.m_lowerTranslation) < 2.0 * b2Settings.b2_linearSlop) {
            C2 = b2Math.Clamp(translation, (-b2Settings.b2_maxLinearCorrection), b2Settings.b2_maxLinearCorrection);
            linearError = b2Math.Abs(translation);
            active = true;
         }
         else if (translation <= this.m_lowerTranslation) {
            C2 = b2Math.Clamp(translation - this.m_lowerTranslation + b2Settings.b2_linearSlop, (-b2Settings.b2_maxLinearCorrection), 0.0);
            linearError = this.m_lowerTranslation - translation;
            active = true;
         }
         else if (translation >= this.m_upperTranslation) {
            C2 = b2Math.Clamp(translation - this.m_upperTranslation + b2Settings.b2_linearSlop, 0.0, b2Settings.b2_maxLinearCorrection);
            linearError = translation - this.m_upperTranslation;
            active = true;
         }
      }
      this.m_perp = b2Math.MulMV(R1, this.m_localYAxis1);
      this.m_s1 = (dX + r1X) * this.m_perp.y - (dY + r1Y) * this.m_perp.x;
      this.m_s2 = r2X * this.m_perp.y - r2Y * this.m_perp.x;
      var impulse = new b2Vec3();
      var C1X = this.m_perp.x * dX + this.m_perp.y * dY;
      var C1Y = a2 - a1 - this.m_refAngle;
      linearError = b2Math.Max(linearError, b2Math.Abs(C1X));
      angularError = b2Math.Abs(C1Y);
      if (active) {
         m1 = this.m_invMassA;
         m2 = this.m_invMassB;
         i1 = this.m_invIA;
         i2 = this.m_invIB;
         this.m_K.col1.x = m1 + m2 + i1 * this.m_s1 * this.m_s1 + i2 * this.m_s2 * this.m_s2;
         this.m_K.col1.y = i1 * this.m_s1 + i2 * this.m_s2;
         this.m_K.col1.z = i1 * this.m_s1 * this.m_a1 + i2 * this.m_s2 * this.m_a2;
         this.m_K.col2.x = this.m_K.col1.y;
         this.m_K.col2.y = i1 + i2;
         this.m_K.col2.z = i1 * this.m_a1 + i2 * this.m_a2;
         this.m_K.col3.x = this.m_K.col1.z;
         this.m_K.col3.y = this.m_K.col2.z;
         this.m_K.col3.z = m1 + m2 + i1 * this.m_a1 * this.m_a1 + i2 * this.m_a2 * this.m_a2;
         this.m_K.Solve33(impulse, (-C1X), (-C1Y), (-C2));
      }
      else {
         m1 = this.m_invMassA;
         m2 = this.m_invMassB;
         i1 = this.m_invIA;
         i2 = this.m_invIB;
         var k11 = m1 + m2 + i1 * this.m_s1 * this.m_s1 + i2 * this.m_s2 * this.m_s2;
         var k12 = i1 * this.m_s1 + i2 * this.m_s2;
         var k22 = i1 + i2;
         this.m_K.col1.Set(k11, k12, 0.0);
         this.m_K.col2.Set(k12, k22, 0.0);
         var impulse1 = this.m_K.Solve22(new b2Vec2(), (-C1X), (-C1Y));
         impulse.x = impulse1.x;
         impulse.y = impulse1.y;
         impulse.z = 0.0;
      }
      var PX = impulse.x * this.m_perp.x + impulse.z * this.m_axis.x;
      var PY = impulse.x * this.m_perp.y + impulse.z * this.m_axis.y;
      var L1 = impulse.x * this.m_s1 + impulse.y + impulse.z * this.m_a1;
      var L2 = impulse.x * this.m_s2 + impulse.y + impulse.z * this.m_a2;
      c1.x -= this.m_invMassA * PX;
      c1.y -= this.m_invMassA * PY;
      a1 -= this.m_invIA * L1;
      c2.x += this.m_invMassB * PX;
      c2.y += this.m_invMassB * PY;
      a2 += this.m_invIB * L2;
      bA.m_sweep.a = a1;
      bB.m_sweep.a = a2;
      bA.SynchronizeTransform();
      bB.SynchronizeTransform();
      return linearError <= b2Settings.b2_linearSlop && angularError <= b2Settings.b2_angularSlop;
   }
   Box2D.inherit(b2PrismaticJointDef, Box2D.Dynamics.Joints.b2JointDef);
   b2PrismaticJointDef.prototype.__super = Box2D.Dynamics.Joints.b2JointDef.prototype;
   b2PrismaticJointDef.b2PrismaticJointDef = function () {
      Box2D.Dynamics.Joints.b2JointDef.b2JointDef.apply(this, arguments);
      this.localAnchorA = new b2Vec2();
      this.localAnchorB = new b2Vec2();
      this.localAxisA = new b2Vec2();
   };
   b2PrismaticJointDef.prototype.b2PrismaticJointDef = function () {
      this.__super.b2JointDef.call(this);
      this.type = b2Joint.e_prismaticJoint;
      this.localAxisA.Set(1.0, 0.0);
      this.referenceAngle = 0.0;
      this.enableLimit = false;
      this.lowerTranslation = 0.0;
      this.upperTranslation = 0.0;
      this.enableMotor = false;
      this.maxMotorForce = 0.0;
      this.motorSpeed = 0.0;
   }
   b2PrismaticJointDef.prototype.Initialize = function (bA, bB, anchor, axis) {
      this.bodyA = bA;
      this.bodyB = bB;
      this.localAnchorA = this.bodyA.GetLocalPoint(anchor);
      this.localAnchorB = this.bodyB.GetLocalPoint(anchor);
      this.localAxisA = this.bodyA.GetLocalVector(axis);
      this.referenceAngle = this.bodyB.GetAngle() - this.bodyA.GetAngle();
   }
   Box2D.inherit(b2PulleyJoint, Box2D.Dynamics.Joints.b2Joint);
   b2PulleyJoint.prototype.__super = Box2D.Dynamics.Joints.b2Joint.prototype;
   b2PulleyJoint.b2PulleyJoint = function () {
      Box2D.Dynamics.Joints.b2Joint.b2Joint.apply(this, arguments);
      this.m_groundAnchor1 = new b2Vec2();
      this.m_groundAnchor2 = new b2Vec2();
      this.m_localAnchor1 = new b2Vec2();
      this.m_localAnchor2 = new b2Vec2();
      this.m_u1 = new b2Vec2();
      this.m_u2 = new b2Vec2();
   };
   b2PulleyJoint.prototype.GetAnchorA = function () {
      return this.m_bodyA.GetWorldPoint(this.m_localAnchor1);
   }
   b2PulleyJoint.prototype.GetAnchorB = function () {
      return this.m_bodyB.GetWorldPoint(this.m_localAnchor2);
   }
   b2PulleyJoint.prototype.GetReactionForce = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return new b2Vec2(inv_dt * this.m_impulse * this.m_u2.x, inv_dt * this.m_impulse * this.m_u2.y);
   }
   b2PulleyJoint.prototype.GetReactionTorque = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return 0.0;
   }
   b2PulleyJoint.prototype.GetGroundAnchorA = function () {
      var a = this.m_ground.m_xf.position.Copy();
      a.Add(this.m_groundAnchor1);
      return a;
   }
   b2PulleyJoint.prototype.GetGroundAnchorB = function () {
      var a = this.m_ground.m_xf.position.Copy();
      a.Add(this.m_groundAnchor2);
      return a;
   }
   b2PulleyJoint.prototype.GetLength1 = function () {
      var p = this.m_bodyA.GetWorldPoint(this.m_localAnchor1);
      var sX = this.m_ground.m_xf.position.x + this.m_groundAnchor1.x;
      var sY = this.m_ground.m_xf.position.y + this.m_groundAnchor1.y;
      var dX = p.x - sX;
      var dY = p.y - sY;
      return Math.sqrt(dX * dX + dY * dY);
   }
   b2PulleyJoint.prototype.GetLength2 = function () {
      var p = this.m_bodyB.GetWorldPoint(this.m_localAnchor2);
      var sX = this.m_ground.m_xf.position.x + this.m_groundAnchor2.x;
      var sY = this.m_ground.m_xf.position.y + this.m_groundAnchor2.y;
      var dX = p.x - sX;
      var dY = p.y - sY;
      return Math.sqrt(dX * dX + dY * dY);
   }
   b2PulleyJoint.prototype.GetRatio = function () {
      return this.m_ratio;
   }
   b2PulleyJoint.prototype.b2PulleyJoint = function (def) {
      this.__super.b2Joint.call(this, def);
      var tMat;
      var tX = 0;
      var tY = 0;
      this.m_ground = this.m_bodyA.m_world.m_groundBody;
      this.m_groundAnchor1.x = def.groundAnchorA.x - this.m_ground.m_xf.position.x;
      this.m_groundAnchor1.y = def.groundAnchorA.y - this.m_ground.m_xf.position.y;
      this.m_groundAnchor2.x = def.groundAnchorB.x - this.m_ground.m_xf.position.x;
      this.m_groundAnchor2.y = def.groundAnchorB.y - this.m_ground.m_xf.position.y;
      this.m_localAnchor1.SetV(def.localAnchorA);
      this.m_localAnchor2.SetV(def.localAnchorB);
      this.m_ratio = def.ratio;
      this.m_constant = def.lengthA + this.m_ratio * def.lengthB;
      this.m_maxLength1 = b2Math.Min(def.maxLengthA, this.m_constant - this.m_ratio * b2PulleyJoint.b2_minPulleyLength);
      this.m_maxLength2 = b2Math.Min(def.maxLengthB, (this.m_constant - b2PulleyJoint.b2_minPulleyLength) / this.m_ratio);
      this.m_impulse = 0.0;
      this.m_limitImpulse1 = 0.0;
      this.m_limitImpulse2 = 0.0;
   }
   b2PulleyJoint.prototype.InitVelocityConstraints = function (step) {
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var tMat;
      tMat = bA.m_xf.R;
      var r1X = this.m_localAnchor1.x - bA.m_sweep.localCenter.x;
      var r1Y = this.m_localAnchor1.y - bA.m_sweep.localCenter.y;
      var tX = (tMat.col1.x * r1X + tMat.col2.x * r1Y);
      r1Y = (tMat.col1.y * r1X + tMat.col2.y * r1Y);
      r1X = tX;
      tMat = bB.m_xf.R;
      var r2X = this.m_localAnchor2.x - bB.m_sweep.localCenter.x;
      var r2Y = this.m_localAnchor2.y - bB.m_sweep.localCenter.y;
      tX = (tMat.col1.x * r2X + tMat.col2.x * r2Y);
      r2Y = (tMat.col1.y * r2X + tMat.col2.y * r2Y);
      r2X = tX;
      var p1X = bA.m_sweep.c.x + r1X;
      var p1Y = bA.m_sweep.c.y + r1Y;
      var p2X = bB.m_sweep.c.x + r2X;
      var p2Y = bB.m_sweep.c.y + r2Y;
      var s1X = this.m_ground.m_xf.position.x + this.m_groundAnchor1.x;
      var s1Y = this.m_ground.m_xf.position.y + this.m_groundAnchor1.y;
      var s2X = this.m_ground.m_xf.position.x + this.m_groundAnchor2.x;
      var s2Y = this.m_ground.m_xf.position.y + this.m_groundAnchor2.y;
      this.m_u1.Set(p1X - s1X, p1Y - s1Y);
      this.m_u2.Set(p2X - s2X, p2Y - s2Y);
      var length1 = this.m_u1.Length();
      var length2 = this.m_u2.Length();
      if (length1 > b2Settings.b2_linearSlop) {
         this.m_u1.Multiply(1.0 / length1);
      }
      else {
         this.m_u1.SetZero();
      }
      if (length2 > b2Settings.b2_linearSlop) {
         this.m_u2.Multiply(1.0 / length2);
      }
      else {
         this.m_u2.SetZero();
      }
      var C = this.m_constant - length1 - this.m_ratio * length2;
      if (C > 0.0) {
         this.m_state = b2Joint.e_inactiveLimit;
         this.m_impulse = 0.0;
      }
      else {
         this.m_state = b2Joint.e_atUpperLimit;
      }
      if (length1 < this.m_maxLength1) {
         this.m_limitState1 = b2Joint.e_inactiveLimit;
         this.m_limitImpulse1 = 0.0;
      }
      else {
         this.m_limitState1 = b2Joint.e_atUpperLimit;
      }
      if (length2 < this.m_maxLength2) {
         this.m_limitState2 = b2Joint.e_inactiveLimit;
         this.m_limitImpulse2 = 0.0;
      }
      else {
         this.m_limitState2 = b2Joint.e_atUpperLimit;
      }
      var cr1u1 = r1X * this.m_u1.y - r1Y * this.m_u1.x;
      var cr2u2 = r2X * this.m_u2.y - r2Y * this.m_u2.x;
      this.m_limitMass1 = bA.m_invMass + bA.m_invI * cr1u1 * cr1u1;
      this.m_limitMass2 = bB.m_invMass + bB.m_invI * cr2u2 * cr2u2;
      this.m_pulleyMass = this.m_limitMass1 + this.m_ratio * this.m_ratio * this.m_limitMass2;
      this.m_limitMass1 = 1.0 / this.m_limitMass1;
      this.m_limitMass2 = 1.0 / this.m_limitMass2;
      this.m_pulleyMass = 1.0 / this.m_pulleyMass;
      if (step.warmStarting) {
         this.m_impulse *= step.dtRatio;
         this.m_limitImpulse1 *= step.dtRatio;
         this.m_limitImpulse2 *= step.dtRatio;
         var P1X = ((-this.m_impulse) - this.m_limitImpulse1) * this.m_u1.x;
         var P1Y = ((-this.m_impulse) - this.m_limitImpulse1) * this.m_u1.y;
         var P2X = ((-this.m_ratio * this.m_impulse) - this.m_limitImpulse2) * this.m_u2.x;
         var P2Y = ((-this.m_ratio * this.m_impulse) - this.m_limitImpulse2) * this.m_u2.y;
         bA.m_linearVelocity.x += bA.m_invMass * P1X;
         bA.m_linearVelocity.y += bA.m_invMass * P1Y;
         bA.m_angularVelocity += bA.m_invI * (r1X * P1Y - r1Y * P1X);
         bB.m_linearVelocity.x += bB.m_invMass * P2X;
         bB.m_linearVelocity.y += bB.m_invMass * P2Y;
         bB.m_angularVelocity += bB.m_invI * (r2X * P2Y - r2Y * P2X);
      }
      else {
         this.m_impulse = 0.0;
         this.m_limitImpulse1 = 0.0;
         this.m_limitImpulse2 = 0.0;
      }
   }
   b2PulleyJoint.prototype.SolveVelocityConstraints = function (step) {
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var tMat;
      tMat = bA.m_xf.R;
      var r1X = this.m_localAnchor1.x - bA.m_sweep.localCenter.x;
      var r1Y = this.m_localAnchor1.y - bA.m_sweep.localCenter.y;
      var tX = (tMat.col1.x * r1X + tMat.col2.x * r1Y);
      r1Y = (tMat.col1.y * r1X + tMat.col2.y * r1Y);
      r1X = tX;
      tMat = bB.m_xf.R;
      var r2X = this.m_localAnchor2.x - bB.m_sweep.localCenter.x;
      var r2Y = this.m_localAnchor2.y - bB.m_sweep.localCenter.y;
      tX = (tMat.col1.x * r2X + tMat.col2.x * r2Y);
      r2Y = (tMat.col1.y * r2X + tMat.col2.y * r2Y);
      r2X = tX;
      var v1X = 0;
      var v1Y = 0;
      var v2X = 0;
      var v2Y = 0;
      var P1X = 0;
      var P1Y = 0;
      var P2X = 0;
      var P2Y = 0;
      var Cdot = 0;
      var impulse = 0;
      var oldImpulse = 0;
      if (this.m_state == b2Joint.e_atUpperLimit) {
         v1X = bA.m_linearVelocity.x + ((-bA.m_angularVelocity * r1Y));
         v1Y = bA.m_linearVelocity.y + (bA.m_angularVelocity * r1X);
         v2X = bB.m_linearVelocity.x + ((-bB.m_angularVelocity * r2Y));
         v2Y = bB.m_linearVelocity.y + (bB.m_angularVelocity * r2X);
         Cdot = (-(this.m_u1.x * v1X + this.m_u1.y * v1Y)) - this.m_ratio * (this.m_u2.x * v2X + this.m_u2.y * v2Y);
         impulse = this.m_pulleyMass * ((-Cdot));
         oldImpulse = this.m_impulse;
         this.m_impulse = b2Math.Max(0.0, this.m_impulse + impulse);
         impulse = this.m_impulse - oldImpulse;
         P1X = (-impulse * this.m_u1.x);
         P1Y = (-impulse * this.m_u1.y);
         P2X = (-this.m_ratio * impulse * this.m_u2.x);
         P2Y = (-this.m_ratio * impulse * this.m_u2.y);
         bA.m_linearVelocity.x += bA.m_invMass * P1X;
         bA.m_linearVelocity.y += bA.m_invMass * P1Y;
         bA.m_angularVelocity += bA.m_invI * (r1X * P1Y - r1Y * P1X);
         bB.m_linearVelocity.x += bB.m_invMass * P2X;
         bB.m_linearVelocity.y += bB.m_invMass * P2Y;
         bB.m_angularVelocity += bB.m_invI * (r2X * P2Y - r2Y * P2X);
      }
      if (this.m_limitState1 == b2Joint.e_atUpperLimit) {
         v1X = bA.m_linearVelocity.x + ((-bA.m_angularVelocity * r1Y));
         v1Y = bA.m_linearVelocity.y + (bA.m_angularVelocity * r1X);
         Cdot = (-(this.m_u1.x * v1X + this.m_u1.y * v1Y));
         impulse = (-this.m_limitMass1 * Cdot);
         oldImpulse = this.m_limitImpulse1;
         this.m_limitImpulse1 = b2Math.Max(0.0, this.m_limitImpulse1 + impulse);
         impulse = this.m_limitImpulse1 - oldImpulse;
         P1X = (-impulse * this.m_u1.x);
         P1Y = (-impulse * this.m_u1.y);
         bA.m_linearVelocity.x += bA.m_invMass * P1X;
         bA.m_linearVelocity.y += bA.m_invMass * P1Y;
         bA.m_angularVelocity += bA.m_invI * (r1X * P1Y - r1Y * P1X);
      }
      if (this.m_limitState2 == b2Joint.e_atUpperLimit) {
         v2X = bB.m_linearVelocity.x + ((-bB.m_angularVelocity * r2Y));
         v2Y = bB.m_linearVelocity.y + (bB.m_angularVelocity * r2X);
         Cdot = (-(this.m_u2.x * v2X + this.m_u2.y * v2Y));
         impulse = (-this.m_limitMass2 * Cdot);
         oldImpulse = this.m_limitImpulse2;
         this.m_limitImpulse2 = b2Math.Max(0.0, this.m_limitImpulse2 + impulse);
         impulse = this.m_limitImpulse2 - oldImpulse;
         P2X = (-impulse * this.m_u2.x);
         P2Y = (-impulse * this.m_u2.y);
         bB.m_linearVelocity.x += bB.m_invMass * P2X;
         bB.m_linearVelocity.y += bB.m_invMass * P2Y;
         bB.m_angularVelocity += bB.m_invI * (r2X * P2Y - r2Y * P2X);
      }
   }
   b2PulleyJoint.prototype.SolvePositionConstraints = function (baumgarte) {
      if (baumgarte === undefined) baumgarte = 0;
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var tMat;
      var s1X = this.m_ground.m_xf.position.x + this.m_groundAnchor1.x;
      var s1Y = this.m_ground.m_xf.position.y + this.m_groundAnchor1.y;
      var s2X = this.m_ground.m_xf.position.x + this.m_groundAnchor2.x;
      var s2Y = this.m_ground.m_xf.position.y + this.m_groundAnchor2.y;
      var r1X = 0;
      var r1Y = 0;
      var r2X = 0;
      var r2Y = 0;
      var p1X = 0;
      var p1Y = 0;
      var p2X = 0;
      var p2Y = 0;
      var length1 = 0;
      var length2 = 0;
      var C = 0;
      var impulse = 0;
      var oldImpulse = 0;
      var oldLimitPositionImpulse = 0;
      var tX = 0;
      var linearError = 0.0;
      if (this.m_state == b2Joint.e_atUpperLimit) {
         tMat = bA.m_xf.R;
         r1X = this.m_localAnchor1.x - bA.m_sweep.localCenter.x;
         r1Y = this.m_localAnchor1.y - bA.m_sweep.localCenter.y;
         tX = (tMat.col1.x * r1X + tMat.col2.x * r1Y);
         r1Y = (tMat.col1.y * r1X + tMat.col2.y * r1Y);
         r1X = tX;
         tMat = bB.m_xf.R;
         r2X = this.m_localAnchor2.x - bB.m_sweep.localCenter.x;
         r2Y = this.m_localAnchor2.y - bB.m_sweep.localCenter.y;
         tX = (tMat.col1.x * r2X + tMat.col2.x * r2Y);
         r2Y = (tMat.col1.y * r2X + tMat.col2.y * r2Y);
         r2X = tX;
         p1X = bA.m_sweep.c.x + r1X;
         p1Y = bA.m_sweep.c.y + r1Y;
         p2X = bB.m_sweep.c.x + r2X;
         p2Y = bB.m_sweep.c.y + r2Y;
         this.m_u1.Set(p1X - s1X, p1Y - s1Y);
         this.m_u2.Set(p2X - s2X, p2Y - s2Y);
         length1 = this.m_u1.Length();
         length2 = this.m_u2.Length();
         if (length1 > b2Settings.b2_linearSlop) {
            this.m_u1.Multiply(1.0 / length1);
         }
         else {
            this.m_u1.SetZero();
         }
         if (length2 > b2Settings.b2_linearSlop) {
            this.m_u2.Multiply(1.0 / length2);
         }
         else {
            this.m_u2.SetZero();
         }
         C = this.m_constant - length1 - this.m_ratio * length2;
         linearError = b2Math.Max(linearError, (-C));
         C = b2Math.Clamp(C + b2Settings.b2_linearSlop, (-b2Settings.b2_maxLinearCorrection), 0.0);
         impulse = (-this.m_pulleyMass * C);
         p1X = (-impulse * this.m_u1.x);
         p1Y = (-impulse * this.m_u1.y);
         p2X = (-this.m_ratio * impulse * this.m_u2.x);
         p2Y = (-this.m_ratio * impulse * this.m_u2.y);
         bA.m_sweep.c.x += bA.m_invMass * p1X;
         bA.m_sweep.c.y += bA.m_invMass * p1Y;
         bA.m_sweep.a += bA.m_invI * (r1X * p1Y - r1Y * p1X);
         bB.m_sweep.c.x += bB.m_invMass * p2X;
         bB.m_sweep.c.y += bB.m_invMass * p2Y;
         bB.m_sweep.a += bB.m_invI * (r2X * p2Y - r2Y * p2X);
         bA.SynchronizeTransform();
         bB.SynchronizeTransform();
      }
      if (this.m_limitState1 == b2Joint.e_atUpperLimit) {
         tMat = bA.m_xf.R;
         r1X = this.m_localAnchor1.x - bA.m_sweep.localCenter.x;
         r1Y = this.m_localAnchor1.y - bA.m_sweep.localCenter.y;
         tX = (tMat.col1.x * r1X + tMat.col2.x * r1Y);
         r1Y = (tMat.col1.y * r1X + tMat.col2.y * r1Y);
         r1X = tX;
         p1X = bA.m_sweep.c.x + r1X;
         p1Y = bA.m_sweep.c.y + r1Y;
         this.m_u1.Set(p1X - s1X, p1Y - s1Y);
         length1 = this.m_u1.Length();
         if (length1 > b2Settings.b2_linearSlop) {
            this.m_u1.x *= 1.0 / length1;
            this.m_u1.y *= 1.0 / length1;
         }
         else {
            this.m_u1.SetZero();
         }
         C = this.m_maxLength1 - length1;
         linearError = b2Math.Max(linearError, (-C));
         C = b2Math.Clamp(C + b2Settings.b2_linearSlop, (-b2Settings.b2_maxLinearCorrection), 0.0);
         impulse = (-this.m_limitMass1 * C);
         p1X = (-impulse * this.m_u1.x);
         p1Y = (-impulse * this.m_u1.y);
         bA.m_sweep.c.x += bA.m_invMass * p1X;
         bA.m_sweep.c.y += bA.m_invMass * p1Y;
         bA.m_sweep.a += bA.m_invI * (r1X * p1Y - r1Y * p1X);
         bA.SynchronizeTransform();
      }
      if (this.m_limitState2 == b2Joint.e_atUpperLimit) {
         tMat = bB.m_xf.R;
         r2X = this.m_localAnchor2.x - bB.m_sweep.localCenter.x;
         r2Y = this.m_localAnchor2.y - bB.m_sweep.localCenter.y;
         tX = (tMat.col1.x * r2X + tMat.col2.x * r2Y);
         r2Y = (tMat.col1.y * r2X + tMat.col2.y * r2Y);
         r2X = tX;
         p2X = bB.m_sweep.c.x + r2X;
         p2Y = bB.m_sweep.c.y + r2Y;
         this.m_u2.Set(p2X - s2X, p2Y - s2Y);
         length2 = this.m_u2.Length();
         if (length2 > b2Settings.b2_linearSlop) {
            this.m_u2.x *= 1.0 / length2;
            this.m_u2.y *= 1.0 / length2;
         }
         else {
            this.m_u2.SetZero();
         }
         C = this.m_maxLength2 - length2;
         linearError = b2Math.Max(linearError, (-C));
         C = b2Math.Clamp(C + b2Settings.b2_linearSlop, (-b2Settings.b2_maxLinearCorrection), 0.0);
         impulse = (-this.m_limitMass2 * C);
         p2X = (-impulse * this.m_u2.x);
         p2Y = (-impulse * this.m_u2.y);
         bB.m_sweep.c.x += bB.m_invMass * p2X;
         bB.m_sweep.c.y += bB.m_invMass * p2Y;
         bB.m_sweep.a += bB.m_invI * (r2X * p2Y - r2Y * p2X);
         bB.SynchronizeTransform();
      }
      return linearError < b2Settings.b2_linearSlop;
   }
   Box2D.postDefs.push(function () {
      Box2D.Dynamics.Joints.b2PulleyJoint.b2_minPulleyLength = 2.0;
   });
   Box2D.inherit(b2PulleyJointDef, Box2D.Dynamics.Joints.b2JointDef);
   b2PulleyJointDef.prototype.__super = Box2D.Dynamics.Joints.b2JointDef.prototype;
   b2PulleyJointDef.b2PulleyJointDef = function () {
      Box2D.Dynamics.Joints.b2JointDef.b2JointDef.apply(this, arguments);
      this.groundAnchorA = new b2Vec2();
      this.groundAnchorB = new b2Vec2();
      this.localAnchorA = new b2Vec2();
      this.localAnchorB = new b2Vec2();
   };
   b2PulleyJointDef.prototype.b2PulleyJointDef = function () {
      this.__super.b2JointDef.call(this);
      this.type = b2Joint.e_pulleyJoint;
      this.groundAnchorA.Set((-1.0), 1.0);
      this.groundAnchorB.Set(1.0, 1.0);
      this.localAnchorA.Set((-1.0), 0.0);
      this.localAnchorB.Set(1.0, 0.0);
      this.lengthA = 0.0;
      this.maxLengthA = 0.0;
      this.lengthB = 0.0;
      this.maxLengthB = 0.0;
      this.ratio = 1.0;
      this.collideConnected = true;
   }
   b2PulleyJointDef.prototype.Initialize = function (bA, bB, gaA, gaB, anchorA, anchorB, r) {
      if (r === undefined) r = 0;
      this.bodyA = bA;
      this.bodyB = bB;
      this.groundAnchorA.SetV(gaA);
      this.groundAnchorB.SetV(gaB);
      this.localAnchorA = this.bodyA.GetLocalPoint(anchorA);
      this.localAnchorB = this.bodyB.GetLocalPoint(anchorB);
      var d1X = anchorA.x - gaA.x;
      var d1Y = anchorA.y - gaA.y;
      this.lengthA = Math.sqrt(d1X * d1X + d1Y * d1Y);
      var d2X = anchorB.x - gaB.x;
      var d2Y = anchorB.y - gaB.y;
      this.lengthB = Math.sqrt(d2X * d2X + d2Y * d2Y);
      this.ratio = r;
      var C = this.lengthA + this.ratio * this.lengthB;
      this.maxLengthA = C - this.ratio * b2PulleyJoint.b2_minPulleyLength;
      this.maxLengthB = (C - b2PulleyJoint.b2_minPulleyLength) / this.ratio;
   }
   Box2D.inherit(b2RevoluteJoint, Box2D.Dynamics.Joints.b2Joint);
   b2RevoluteJoint.prototype.__super = Box2D.Dynamics.Joints.b2Joint.prototype;
   b2RevoluteJoint.b2RevoluteJoint = function () {
      Box2D.Dynamics.Joints.b2Joint.b2Joint.apply(this, arguments);
      this.K = new b2Mat22();
      this.K1 = new b2Mat22();
      this.K2 = new b2Mat22();
      this.K3 = new b2Mat22();
      this.impulse3 = new b2Vec3();
      this.impulse2 = new b2Vec2();
      this.reduced = new b2Vec2();
      this.m_localAnchor1 = new b2Vec2();
      this.m_localAnchor2 = new b2Vec2();
      this.m_impulse = new b2Vec3();
      this.m_mass = new b2Mat33();
   };
   b2RevoluteJoint.prototype.GetAnchorA = function () {
      return this.m_bodyA.GetWorldPoint(this.m_localAnchor1);
   }
   b2RevoluteJoint.prototype.GetAnchorB = function () {
      return this.m_bodyB.GetWorldPoint(this.m_localAnchor2);
   }
   b2RevoluteJoint.prototype.GetReactionForce = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return new b2Vec2(inv_dt * this.m_impulse.x, inv_dt * this.m_impulse.y);
   }
   b2RevoluteJoint.prototype.GetReactionTorque = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return inv_dt * this.m_impulse.z;
   }
   b2RevoluteJoint.prototype.GetJointAngle = function () {
      return this.m_bodyB.m_sweep.a - this.m_bodyA.m_sweep.a - this.m_referenceAngle;
   }
   b2RevoluteJoint.prototype.GetJointSpeed = function () {
      return this.m_bodyB.m_angularVelocity - this.m_bodyA.m_angularVelocity;
   }
   b2RevoluteJoint.prototype.IsLimitEnabled = function () {
      return this.m_enableLimit;
   }
   b2RevoluteJoint.prototype.EnableLimit = function (flag) {
      this.m_enableLimit = flag;
   }
   b2RevoluteJoint.prototype.GetLowerLimit = function () {
      return this.m_lowerAngle;
   }
   b2RevoluteJoint.prototype.GetUpperLimit = function () {
      return this.m_upperAngle;
   }
   b2RevoluteJoint.prototype.SetLimits = function (lower, upper) {
      if (lower === undefined) lower = 0;
      if (upper === undefined) upper = 0;
      this.m_lowerAngle = lower;
      this.m_upperAngle = upper;
   }
   b2RevoluteJoint.prototype.IsMotorEnabled = function () {
      this.m_bodyA.SetAwake(true);
      this.m_bodyB.SetAwake(true);
      return this.m_enableMotor;
   }
   b2RevoluteJoint.prototype.EnableMotor = function (flag) {
      this.m_enableMotor = flag;
   }
   b2RevoluteJoint.prototype.SetMotorSpeed = function (speed) {
      if (speed === undefined) speed = 0;
      this.m_bodyA.SetAwake(true);
      this.m_bodyB.SetAwake(true);
      this.m_motorSpeed = speed;
   }
   b2RevoluteJoint.prototype.GetMotorSpeed = function () {
      return this.m_motorSpeed;
   }
   b2RevoluteJoint.prototype.SetMaxMotorTorque = function (torque) {
      if (torque === undefined) torque = 0;
      this.m_maxMotorTorque = torque;
   }
   b2RevoluteJoint.prototype.GetMotorTorque = function () {
      return this.m_maxMotorTorque;
   }
   b2RevoluteJoint.prototype.b2RevoluteJoint = function (def) {
      this.__super.b2Joint.call(this, def);
      this.m_localAnchor1.SetV(def.localAnchorA);
      this.m_localAnchor2.SetV(def.localAnchorB);
      this.m_referenceAngle = def.referenceAngle;
      this.m_impulse.SetZero();
      this.m_motorImpulse = 0.0;
      this.m_lowerAngle = def.lowerAngle;
      this.m_upperAngle = def.upperAngle;
      this.m_maxMotorTorque = def.maxMotorTorque;
      this.m_motorSpeed = def.motorSpeed;
      this.m_enableLimit = def.enableLimit;
      this.m_enableMotor = def.enableMotor;
      this.m_limitState = b2Joint.e_inactiveLimit;
   }
   b2RevoluteJoint.prototype.InitVelocityConstraints = function (step) {
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var tMat;
      var tX = 0;
      if (this.m_enableMotor || this.m_enableLimit) {}
      tMat = bA.m_xf.R;
      var r1X = this.m_localAnchor1.x - bA.m_sweep.localCenter.x;
      var r1Y = this.m_localAnchor1.y - bA.m_sweep.localCenter.y;
      tX = (tMat.col1.x * r1X + tMat.col2.x * r1Y);
      r1Y = (tMat.col1.y * r1X + tMat.col2.y * r1Y);
      r1X = tX;
      tMat = bB.m_xf.R;
      var r2X = this.m_localAnchor2.x - bB.m_sweep.localCenter.x;
      var r2Y = this.m_localAnchor2.y - bB.m_sweep.localCenter.y;
      tX = (tMat.col1.x * r2X + tMat.col2.x * r2Y);
      r2Y = (tMat.col1.y * r2X + tMat.col2.y * r2Y);
      r2X = tX;
      var m1 = bA.m_invMass;
      var m2 = bB.m_invMass;
      var i1 = bA.m_invI;
      var i2 = bB.m_invI;
      this.m_mass.col1.x = m1 + m2 + r1Y * r1Y * i1 + r2Y * r2Y * i2;
      this.m_mass.col2.x = (-r1Y * r1X * i1) - r2Y * r2X * i2;
      this.m_mass.col3.x = (-r1Y * i1) - r2Y * i2;
      this.m_mass.col1.y = this.m_mass.col2.x;
      this.m_mass.col2.y = m1 + m2 + r1X * r1X * i1 + r2X * r2X * i2;
      this.m_mass.col3.y = r1X * i1 + r2X * i2;
      this.m_mass.col1.z = this.m_mass.col3.x;
      this.m_mass.col2.z = this.m_mass.col3.y;
      this.m_mass.col3.z = i1 + i2;
      this.m_motorMass = 1.0 / (i1 + i2);
      if (this.m_enableMotor == false) {
         this.m_motorImpulse = 0.0;
      }
      if (this.m_enableLimit) {
         var jointAngle = bB.m_sweep.a - bA.m_sweep.a - this.m_referenceAngle;
         if (b2Math.Abs(this.m_upperAngle - this.m_lowerAngle) < 2.0 * b2Settings.b2_angularSlop) {
            this.m_limitState = b2Joint.e_equalLimits;
         }
         else if (jointAngle <= this.m_lowerAngle) {
            if (this.m_limitState != b2Joint.e_atLowerLimit) {
               this.m_impulse.z = 0.0;
            }
            this.m_limitState = b2Joint.e_atLowerLimit;
         }
         else if (jointAngle >= this.m_upperAngle) {
            if (this.m_limitState != b2Joint.e_atUpperLimit) {
               this.m_impulse.z = 0.0;
            }
            this.m_limitState = b2Joint.e_atUpperLimit;
         }
         else {
            this.m_limitState = b2Joint.e_inactiveLimit;
            this.m_impulse.z = 0.0;
         }
      }
      else {
         this.m_limitState = b2Joint.e_inactiveLimit;
      }
      if (step.warmStarting) {
         this.m_impulse.x *= step.dtRatio;
         this.m_impulse.y *= step.dtRatio;
         this.m_motorImpulse *= step.dtRatio;
         var PX = this.m_impulse.x;
         var PY = this.m_impulse.y;
         bA.m_linearVelocity.x -= m1 * PX;
         bA.m_linearVelocity.y -= m1 * PY;
         bA.m_angularVelocity -= i1 * ((r1X * PY - r1Y * PX) + this.m_motorImpulse + this.m_impulse.z);
         bB.m_linearVelocity.x += m2 * PX;
         bB.m_linearVelocity.y += m2 * PY;
         bB.m_angularVelocity += i2 * ((r2X * PY - r2Y * PX) + this.m_motorImpulse + this.m_impulse.z);
      }
      else {
         this.m_impulse.SetZero();
         this.m_motorImpulse = 0.0;
      }
   }
   b2RevoluteJoint.prototype.SolveVelocityConstraints = function (step) {
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var tMat;
      var tX = 0;
      var newImpulse = 0;
      var r1X = 0;
      var r1Y = 0;
      var r2X = 0;
      var r2Y = 0;
      var v1 = bA.m_linearVelocity;
      var w1 = bA.m_angularVelocity;
      var v2 = bB.m_linearVelocity;
      var w2 = bB.m_angularVelocity;
      var m1 = bA.m_invMass;
      var m2 = bB.m_invMass;
      var i1 = bA.m_invI;
      var i2 = bB.m_invI;
      if (this.m_enableMotor && this.m_limitState != b2Joint.e_equalLimits) {
         var Cdot = w2 - w1 - this.m_motorSpeed;
         var impulse = this.m_motorMass * ((-Cdot));
         var oldImpulse = this.m_motorImpulse;
         var maxImpulse = step.dt * this.m_maxMotorTorque;
         this.m_motorImpulse = b2Math.Clamp(this.m_motorImpulse + impulse, (-maxImpulse), maxImpulse);
         impulse = this.m_motorImpulse - oldImpulse;
         w1 -= i1 * impulse;
         w2 += i2 * impulse;
      }
      if (this.m_enableLimit && this.m_limitState != b2Joint.e_inactiveLimit) {
         tMat = bA.m_xf.R;
         r1X = this.m_localAnchor1.x - bA.m_sweep.localCenter.x;
         r1Y = this.m_localAnchor1.y - bA.m_sweep.localCenter.y;
         tX = (tMat.col1.x * r1X + tMat.col2.x * r1Y);
         r1Y = (tMat.col1.y * r1X + tMat.col2.y * r1Y);
         r1X = tX;
         tMat = bB.m_xf.R;
         r2X = this.m_localAnchor2.x - bB.m_sweep.localCenter.x;
         r2Y = this.m_localAnchor2.y - bB.m_sweep.localCenter.y;
         tX = (tMat.col1.x * r2X + tMat.col2.x * r2Y);
         r2Y = (tMat.col1.y * r2X + tMat.col2.y * r2Y);
         r2X = tX;
         var Cdot1X = v2.x + ((-w2 * r2Y)) - v1.x - ((-w1 * r1Y));
         var Cdot1Y = v2.y + (w2 * r2X) - v1.y - (w1 * r1X);
         var Cdot2 = w2 - w1;
         this.m_mass.Solve33(this.impulse3, (-Cdot1X), (-Cdot1Y), (-Cdot2));
         if (this.m_limitState == b2Joint.e_equalLimits) {
            this.m_impulse.Add(this.impulse3);
         }
         else if (this.m_limitState == b2Joint.e_atLowerLimit) {
            newImpulse = this.m_impulse.z + this.impulse3.z;
            if (newImpulse < 0.0) {
               this.m_mass.Solve22(this.reduced, (-Cdot1X), (-Cdot1Y));
               this.impulse3.x = this.reduced.x;
               this.impulse3.y = this.reduced.y;
               this.impulse3.z = (-this.m_impulse.z);
               this.m_impulse.x += this.reduced.x;
               this.m_impulse.y += this.reduced.y;
               this.m_impulse.z = 0.0;
            }
         }
         else if (this.m_limitState == b2Joint.e_atUpperLimit) {
            newImpulse = this.m_impulse.z + this.impulse3.z;
            if (newImpulse > 0.0) {
               this.m_mass.Solve22(this.reduced, (-Cdot1X), (-Cdot1Y));
               this.impulse3.x = this.reduced.x;
               this.impulse3.y = this.reduced.y;
               this.impulse3.z = (-this.m_impulse.z);
               this.m_impulse.x += this.reduced.x;
               this.m_impulse.y += this.reduced.y;
               this.m_impulse.z = 0.0;
            }
         }
         v1.x -= m1 * this.impulse3.x;
         v1.y -= m1 * this.impulse3.y;
         w1 -= i1 * (r1X * this.impulse3.y - r1Y * this.impulse3.x + this.impulse3.z);
         v2.x += m2 * this.impulse3.x;
         v2.y += m2 * this.impulse3.y;
         w2 += i2 * (r2X * this.impulse3.y - r2Y * this.impulse3.x + this.impulse3.z);
      }
      else {
         tMat = bA.m_xf.R;
         r1X = this.m_localAnchor1.x - bA.m_sweep.localCenter.x;
         r1Y = this.m_localAnchor1.y - bA.m_sweep.localCenter.y;
         tX = (tMat.col1.x * r1X + tMat.col2.x * r1Y);
         r1Y = (tMat.col1.y * r1X + tMat.col2.y * r1Y);
         r1X = tX;
         tMat = bB.m_xf.R;
         r2X = this.m_localAnchor2.x - bB.m_sweep.localCenter.x;
         r2Y = this.m_localAnchor2.y - bB.m_sweep.localCenter.y;
         tX = (tMat.col1.x * r2X + tMat.col2.x * r2Y);
         r2Y = (tMat.col1.y * r2X + tMat.col2.y * r2Y);
         r2X = tX;
         var CdotX = v2.x + ((-w2 * r2Y)) - v1.x - ((-w1 * r1Y));
         var CdotY = v2.y + (w2 * r2X) - v1.y - (w1 * r1X);
         this.m_mass.Solve22(this.impulse2, (-CdotX), (-CdotY));
         this.m_impulse.x += this.impulse2.x;
         this.m_impulse.y += this.impulse2.y;
         v1.x -= m1 * this.impulse2.x;
         v1.y -= m1 * this.impulse2.y;
         w1 -= i1 * (r1X * this.impulse2.y - r1Y * this.impulse2.x);
         v2.x += m2 * this.impulse2.x;
         v2.y += m2 * this.impulse2.y;
         w2 += i2 * (r2X * this.impulse2.y - r2Y * this.impulse2.x);
      }
      bA.m_linearVelocity.SetV(v1);
      bA.m_angularVelocity = w1;
      bB.m_linearVelocity.SetV(v2);
      bB.m_angularVelocity = w2;
   }
   b2RevoluteJoint.prototype.SolvePositionConstraints = function (baumgarte) {
      if (baumgarte === undefined) baumgarte = 0;
      var oldLimitImpulse = 0;
      var C = 0;
      var tMat;
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var angularError = 0.0;
      var positionError = 0.0;
      var tX = 0;
      var impulseX = 0;
      var impulseY = 0;
      if (this.m_enableLimit && this.m_limitState != b2Joint.e_inactiveLimit) {
         var angle = bB.m_sweep.a - bA.m_sweep.a - this.m_referenceAngle;
         var limitImpulse = 0.0;
         if (this.m_limitState == b2Joint.e_equalLimits) {
            C = b2Math.Clamp(angle - this.m_lowerAngle, (-b2Settings.b2_maxAngularCorrection), b2Settings.b2_maxAngularCorrection);
            limitImpulse = (-this.m_motorMass * C);
            angularError = b2Math.Abs(C);
         }
         else if (this.m_limitState == b2Joint.e_atLowerLimit) {
            C = angle - this.m_lowerAngle;
            angularError = (-C);
            C = b2Math.Clamp(C + b2Settings.b2_angularSlop, (-b2Settings.b2_maxAngularCorrection), 0.0);
            limitImpulse = (-this.m_motorMass * C);
         }
         else if (this.m_limitState == b2Joint.e_atUpperLimit) {
            C = angle - this.m_upperAngle;
            angularError = C;
            C = b2Math.Clamp(C - b2Settings.b2_angularSlop, 0.0, b2Settings.b2_maxAngularCorrection);
            limitImpulse = (-this.m_motorMass * C);
         }
         bA.m_sweep.a -= bA.m_invI * limitImpulse;
         bB.m_sweep.a += bB.m_invI * limitImpulse;
         bA.SynchronizeTransform();
         bB.SynchronizeTransform();
      } {
         tMat = bA.m_xf.R;
         var r1X = this.m_localAnchor1.x - bA.m_sweep.localCenter.x;
         var r1Y = this.m_localAnchor1.y - bA.m_sweep.localCenter.y;
         tX = (tMat.col1.x * r1X + tMat.col2.x * r1Y);
         r1Y = (tMat.col1.y * r1X + tMat.col2.y * r1Y);
         r1X = tX;
         tMat = bB.m_xf.R;
         var r2X = this.m_localAnchor2.x - bB.m_sweep.localCenter.x;
         var r2Y = this.m_localAnchor2.y - bB.m_sweep.localCenter.y;
         tX = (tMat.col1.x * r2X + tMat.col2.x * r2Y);
         r2Y = (tMat.col1.y * r2X + tMat.col2.y * r2Y);
         r2X = tX;
         var CX = bB.m_sweep.c.x + r2X - bA.m_sweep.c.x - r1X;
         var CY = bB.m_sweep.c.y + r2Y - bA.m_sweep.c.y - r1Y;
         var CLengthSquared = CX * CX + CY * CY;
         var CLength = Math.sqrt(CLengthSquared);
         positionError = CLength;
         var invMass1 = bA.m_invMass;
         var invMass2 = bB.m_invMass;
         var invI1 = bA.m_invI;
         var invI2 = bB.m_invI;
         var k_allowedStretch = 10.0 * b2Settings.b2_linearSlop;
         if (CLengthSquared > k_allowedStretch * k_allowedStretch) {
            var uX = CX / CLength;
            var uY = CY / CLength;
            var k = invMass1 + invMass2;
            var m = 1.0 / k;
            impulseX = m * ((-CX));
            impulseY = m * ((-CY));
            var k_beta = 0.5;
            bA.m_sweep.c.x -= k_beta * invMass1 * impulseX;
            bA.m_sweep.c.y -= k_beta * invMass1 * impulseY;
            bB.m_sweep.c.x += k_beta * invMass2 * impulseX;
            bB.m_sweep.c.y += k_beta * invMass2 * impulseY;
            CX = bB.m_sweep.c.x + r2X - bA.m_sweep.c.x - r1X;
            CY = bB.m_sweep.c.y + r2Y - bA.m_sweep.c.y - r1Y;
         }
         this.K1.col1.x = invMass1 + invMass2;
         this.K1.col2.x = 0.0;
         this.K1.col1.y = 0.0;
         this.K1.col2.y = invMass1 + invMass2;
         this.K2.col1.x = invI1 * r1Y * r1Y;
         this.K2.col2.x = (-invI1 * r1X * r1Y);
         this.K2.col1.y = (-invI1 * r1X * r1Y);
         this.K2.col2.y = invI1 * r1X * r1X;
         this.K3.col1.x = invI2 * r2Y * r2Y;
         this.K3.col2.x = (-invI2 * r2X * r2Y);
         this.K3.col1.y = (-invI2 * r2X * r2Y);
         this.K3.col2.y = invI2 * r2X * r2X;
         this.K.SetM(this.K1);
         this.K.AddM(this.K2);
         this.K.AddM(this.K3);
         this.K.Solve(b2RevoluteJoint.tImpulse, (-CX), (-CY));
         impulseX = b2RevoluteJoint.tImpulse.x;
         impulseY = b2RevoluteJoint.tImpulse.y;
         bA.m_sweep.c.x -= bA.m_invMass * impulseX;
         bA.m_sweep.c.y -= bA.m_invMass * impulseY;
         bA.m_sweep.a -= bA.m_invI * (r1X * impulseY - r1Y * impulseX);
         bB.m_sweep.c.x += bB.m_invMass * impulseX;
         bB.m_sweep.c.y += bB.m_invMass * impulseY;
         bB.m_sweep.a += bB.m_invI * (r2X * impulseY - r2Y * impulseX);
         bA.SynchronizeTransform();
         bB.SynchronizeTransform();
      }
      return positionError <= b2Settings.b2_linearSlop && angularError <= b2Settings.b2_angularSlop;
   }
   Box2D.postDefs.push(function () {
      Box2D.Dynamics.Joints.b2RevoluteJoint.tImpulse = new b2Vec2();
   });
   Box2D.inherit(b2RevoluteJointDef, Box2D.Dynamics.Joints.b2JointDef);
   b2RevoluteJointDef.prototype.__super = Box2D.Dynamics.Joints.b2JointDef.prototype;
   b2RevoluteJointDef.b2RevoluteJointDef = function () {
      Box2D.Dynamics.Joints.b2JointDef.b2JointDef.apply(this, arguments);
      this.localAnchorA = new b2Vec2();
      this.localAnchorB = new b2Vec2();
   };
   b2RevoluteJointDef.prototype.b2RevoluteJointDef = function () {
      this.__super.b2JointDef.call(this);
      this.type = b2Joint.e_revoluteJoint;
      this.localAnchorA.Set(0.0, 0.0);
      this.localAnchorB.Set(0.0, 0.0);
      this.referenceAngle = 0.0;
      this.lowerAngle = 0.0;
      this.upperAngle = 0.0;
      this.maxMotorTorque = 0.0;
      this.motorSpeed = 0.0;
      this.enableLimit = false;
      this.enableMotor = false;
   }
   b2RevoluteJointDef.prototype.Initialize = function (bA, bB, anchor) {
      this.bodyA = bA;
      this.bodyB = bB;
      this.localAnchorA = this.bodyA.GetLocalPoint(anchor);
      this.localAnchorB = this.bodyB.GetLocalPoint(anchor);
      this.referenceAngle = this.bodyB.GetAngle() - this.bodyA.GetAngle();
   }
   Box2D.inherit(b2WeldJoint, Box2D.Dynamics.Joints.b2Joint);
   b2WeldJoint.prototype.__super = Box2D.Dynamics.Joints.b2Joint.prototype;
   b2WeldJoint.b2WeldJoint = function () {
      Box2D.Dynamics.Joints.b2Joint.b2Joint.apply(this, arguments);
      this.m_localAnchorA = new b2Vec2();
      this.m_localAnchorB = new b2Vec2();
      this.m_impulse = new b2Vec3();
      this.m_mass = new b2Mat33();
   };
   b2WeldJoint.prototype.GetAnchorA = function () {
      return this.m_bodyA.GetWorldPoint(this.m_localAnchorA);
   }
   b2WeldJoint.prototype.GetAnchorB = function () {
      return this.m_bodyB.GetWorldPoint(this.m_localAnchorB);
   }
   b2WeldJoint.prototype.GetReactionForce = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return new b2Vec2(inv_dt * this.m_impulse.x, inv_dt * this.m_impulse.y);
   }
   b2WeldJoint.prototype.GetReactionTorque = function (inv_dt) {
      if (inv_dt === undefined) inv_dt = 0;
      return inv_dt * this.m_impulse.z;
   }
   b2WeldJoint.prototype.b2WeldJoint = function (def) {
      this.__super.b2Joint.call(this, def);
      this.m_localAnchorA.SetV(def.localAnchorA);
      this.m_localAnchorB.SetV(def.localAnchorB);
      this.m_referenceAngle = def.referenceAngle;
      this.m_impulse.SetZero();
      this.m_mass = new b2Mat33();
   }
   b2WeldJoint.prototype.InitVelocityConstraints = function (step) {
      var tMat;
      var tX = 0;
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      tMat = bA.m_xf.R;
      var rAX = this.m_localAnchorA.x - bA.m_sweep.localCenter.x;
      var rAY = this.m_localAnchorA.y - bA.m_sweep.localCenter.y;
      tX = (tMat.col1.x * rAX + tMat.col2.x * rAY);
      rAY = (tMat.col1.y * rAX + tMat.col2.y * rAY);
      rAX = tX;
      tMat = bB.m_xf.R;
      var rBX = this.m_localAnchorB.x - bB.m_sweep.localCenter.x;
      var rBY = this.m_localAnchorB.y - bB.m_sweep.localCenter.y;
      tX = (tMat.col1.x * rBX + tMat.col2.x * rBY);
      rBY = (tMat.col1.y * rBX + tMat.col2.y * rBY);
      rBX = tX;
      var mA = bA.m_invMass;
      var mB = bB.m_invMass;
      var iA = bA.m_invI;
      var iB = bB.m_invI;
      this.m_mass.col1.x = mA + mB + rAY * rAY * iA + rBY * rBY * iB;
      this.m_mass.col2.x = (-rAY * rAX * iA) - rBY * rBX * iB;
      this.m_mass.col3.x = (-rAY * iA) - rBY * iB;
      this.m_mass.col1.y = this.m_mass.col2.x;
      this.m_mass.col2.y = mA + mB + rAX * rAX * iA + rBX * rBX * iB;
      this.m_mass.col3.y = rAX * iA + rBX * iB;
      this.m_mass.col1.z = this.m_mass.col3.x;
      this.m_mass.col2.z = this.m_mass.col3.y;
      this.m_mass.col3.z = iA + iB;
      if (step.warmStarting) {
         this.m_impulse.x *= step.dtRatio;
         this.m_impulse.y *= step.dtRatio;
         this.m_impulse.z *= step.dtRatio;
         bA.m_linearVelocity.x -= mA * this.m_impulse.x;
         bA.m_linearVelocity.y -= mA * this.m_impulse.y;
         bA.m_angularVelocity -= iA * (rAX * this.m_impulse.y - rAY * this.m_impulse.x + this.m_impulse.z);
         bB.m_linearVelocity.x += mB * this.m_impulse.x;
         bB.m_linearVelocity.y += mB * this.m_impulse.y;
         bB.m_angularVelocity += iB * (rBX * this.m_impulse.y - rBY * this.m_impulse.x + this.m_impulse.z);
      }
      else {
         this.m_impulse.SetZero();
      }
   }
   b2WeldJoint.prototype.SolveVelocityConstraints = function (step) {
      var tMat;
      var tX = 0;
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      var vA = bA.m_linearVelocity;
      var wA = bA.m_angularVelocity;
      var vB = bB.m_linearVelocity;
      var wB = bB.m_angularVelocity;
      var mA = bA.m_invMass;
      var mB = bB.m_invMass;
      var iA = bA.m_invI;
      var iB = bB.m_invI;
      tMat = bA.m_xf.R;
      var rAX = this.m_localAnchorA.x - bA.m_sweep.localCenter.x;
      var rAY = this.m_localAnchorA.y - bA.m_sweep.localCenter.y;
      tX = (tMat.col1.x * rAX + tMat.col2.x * rAY);
      rAY = (tMat.col1.y * rAX + tMat.col2.y * rAY);
      rAX = tX;
      tMat = bB.m_xf.R;
      var rBX = this.m_localAnchorB.x - bB.m_sweep.localCenter.x;
      var rBY = this.m_localAnchorB.y - bB.m_sweep.localCenter.y;
      tX = (tMat.col1.x * rBX + tMat.col2.x * rBY);
      rBY = (tMat.col1.y * rBX + tMat.col2.y * rBY);
      rBX = tX;
      var Cdot1X = vB.x - wB * rBY - vA.x + wA * rAY;
      var Cdot1Y = vB.y + wB * rBX - vA.y - wA * rAX;
      var Cdot2 = wB - wA;
      var impulse = new b2Vec3();
      this.m_mass.Solve33(impulse, (-Cdot1X), (-Cdot1Y), (-Cdot2));
      this.m_impulse.Add(impulse);
      vA.x -= mA * impulse.x;
      vA.y -= mA * impulse.y;
      wA -= iA * (rAX * impulse.y - rAY * impulse.x + impulse.z);
      vB.x += mB * impulse.x;
      vB.y += mB * impulse.y;
      wB += iB * (rBX * impulse.y - rBY * impulse.x + impulse.z);
      bA.m_angularVelocity = wA;
      bB.m_angularVelocity = wB;
   }
   b2WeldJoint.prototype.SolvePositionConstraints = function (baumgarte) {
      if (baumgarte === undefined) baumgarte = 0;
      var tMat;
      var tX = 0;
      var bA = this.m_bodyA;
      var bB = this.m_bodyB;
      tMat = bA.m_xf.R;
      var rAX = this.m_localAnchorA.x - bA.m_sweep.localCenter.x;
      var rAY = this.m_localAnchorA.y - bA.m_sweep.localCenter.y;
      tX = (tMat.col1.x * rAX + tMat.col2.x * rAY);
      rAY = (tMat.col1.y * rAX + tMat.col2.y * rAY);
      rAX = tX;
      tMat = bB.m_xf.R;
      var rBX = this.m_localAnchorB.x - bB.m_sweep.localCenter.x;
      var rBY = this.m_localAnchorB.y - bB.m_sweep.localCenter.y;
      tX = (tMat.col1.x * rBX + tMat.col2.x * rBY);
      rBY = (tMat.col1.y * rBX + tMat.col2.y * rBY);
      rBX = tX;
      var mA = bA.m_invMass;
      var mB = bB.m_invMass;
      var iA = bA.m_invI;
      var iB = bB.m_invI;
      var C1X = bB.m_sweep.c.x + rBX - bA.m_sweep.c.x - rAX;
      var C1Y = bB.m_sweep.c.y + rBY - bA.m_sweep.c.y - rAY;
      var C2 = bB.m_sweep.a - bA.m_sweep.a - this.m_referenceAngle;
      var k_allowedStretch = 10.0 * b2Settings.b2_linearSlop;
      var positionError = Math.sqrt(C1X * C1X + C1Y * C1Y);
      var angularError = b2Math.Abs(C2);
      if (positionError > k_allowedStretch) {
         iA *= 1.0;
         iB *= 1.0;
      }
      this.m_mass.col1.x = mA + mB + rAY * rAY * iA + rBY * rBY * iB;
      this.m_mass.col2.x = (-rAY * rAX * iA) - rBY * rBX * iB;
      this.m_mass.col3.x = (-rAY * iA) - rBY * iB;
      this.m_mass.col1.y = this.m_mass.col2.x;
      this.m_mass.col2.y = mA + mB + rAX * rAX * iA + rBX * rBX * iB;
      this.m_mass.col3.y = rAX * iA + rBX * iB;
      this.m_mass.col1.z = this.m_mass.col3.x;
      this.m_mass.col2.z = this.m_mass.col3.y;
      this.m_mass.col3.z = iA + iB;
      var impulse = new b2Vec3();
      this.m_mass.Solve33(impulse, (-C1X), (-C1Y), (-C2));
      bA.m_sweep.c.x -= mA * impulse.x;
      bA.m_sweep.c.y -= mA * impulse.y;
      bA.m_sweep.a -= iA * (rAX * impulse.y - rAY * impulse.x + impulse.z);
      bB.m_sweep.c.x += mB * impulse.x;
      bB.m_sweep.c.y += mB * impulse.y;
      bB.m_sweep.a += iB * (rBX * impulse.y - rBY * impulse.x + impulse.z);
      bA.SynchronizeTransform();
      bB.SynchronizeTransform();
      return positionError <= b2Settings.b2_linearSlop && angularError <= b2Settings.b2_angularSlop;
   }
   Box2D.inherit(b2WeldJointDef, Box2D.Dynamics.Joints.b2JointDef);
   b2WeldJointDef.prototype.__super = Box2D.Dynamics.Joints.b2JointDef.prototype;
   b2WeldJointDef.b2WeldJointDef = function () {
      Box2D.Dynamics.Joints.b2JointDef.b2JointDef.apply(this, arguments);
      this.localAnchorA = new b2Vec2();
      this.localAnchorB = new b2Vec2();
   };
   b2WeldJointDef.prototype.b2WeldJointDef = function () {
      this.__super.b2JointDef.call(this);
      this.type = b2Joint.e_weldJoint;
      this.referenceAngle = 0.0;
   }
   b2WeldJointDef.prototype.Initialize = function (bA, bB, anchor) {
      this.bodyA = bA;
      this.bodyB = bB;
      this.localAnchorA.SetV(this.bodyA.GetLocalPoint(anchor));
      this.localAnchorB.SetV(this.bodyB.GetLocalPoint(anchor));
      this.referenceAngle = this.bodyB.GetAngle() - this.bodyA.GetAngle();
   }
})();
(function () {
   var b2DebugDraw = Box2D.Dynamics.b2DebugDraw;
   b2DebugDraw.b2DebugDraw = function () {
      this.m_drawScale = 1.0;
      this.m_lineThickness = 1.0;
      this.m_alpha = 1.0;
      this.m_fillAlpha = 1.0;
      this.m_xformScale = 1.0;
      var __this = this;
      //#WORKAROUND
      this.m_sprite = {
         graphics: {
            clear: function () {
               __this.m_ctx.clearRect(0, 0, __this.m_ctx.canvas.width, __this.m_ctx.canvas.height)
            }
         }
      };
   };
   b2DebugDraw.prototype._color = function (color, alpha) {
      return "rgba(" + ((color & 0xFF0000) >> 16) + "," + ((color & 0xFF00) >> 8) + "," + (color & 0xFF) + "," + alpha + ")";
   };
   b2DebugDraw.prototype.b2DebugDraw = function () {
      this.m_drawFlags = 0;
   };
   b2DebugDraw.prototype.SetFlags = function (flags) {
      if (flags === undefined) flags = 0;
      this.m_drawFlags = flags;
   };
   b2DebugDraw.prototype.GetFlags = function () {
      return this.m_drawFlags;
   };
   b2DebugDraw.prototype.AppendFlags = function (flags) {
      if (flags === undefined) flags = 0;
      this.m_drawFlags |= flags;
   };
   b2DebugDraw.prototype.ClearFlags = function (flags) {
      if (flags === undefined) flags = 0;
      this.m_drawFlags &= ~flags;
   };
   b2DebugDraw.prototype.SetSprite = function (sprite) {
      this.m_ctx = sprite;
   };
   b2DebugDraw.prototype.GetSprite = function () {
      return this.m_ctx;
   };
   b2DebugDraw.prototype.SetDrawScale = function (drawScale) {
      if (drawScale === undefined) drawScale = 0;
      this.m_drawScale = drawScale;
   };
   b2DebugDraw.prototype.GetDrawScale = function () {
      return this.m_drawScale;
   };
   b2DebugDraw.prototype.SetLineThickness = function (lineThickness) {
      if (lineThickness === undefined) lineThickness = 0;
      this.m_lineThickness = lineThickness;
      this.m_ctx.strokeWidth = lineThickness;
   };
   b2DebugDraw.prototype.GetLineThickness = function () {
      return this.m_lineThickness;
   };
   b2DebugDraw.prototype.SetAlpha = function (alpha) {
      if (alpha === undefined) alpha = 0;
      this.m_alpha = alpha;
   };
   b2DebugDraw.prototype.GetAlpha = function () {
      return this.m_alpha;
   };
   b2DebugDraw.prototype.SetFillAlpha = function (alpha) {
      if (alpha === undefined) alpha = 0;
      this.m_fillAlpha = alpha;
   };
   b2DebugDraw.prototype.GetFillAlpha = function () {
      return this.m_fillAlpha;
   };
   b2DebugDraw.prototype.SetXFormScale = function (xformScale) {
      if (xformScale === undefined) xformScale = 0;
      this.m_xformScale = xformScale;
   };
   b2DebugDraw.prototype.GetXFormScale = function () {
      return this.m_xformScale;
   };
   b2DebugDraw.prototype.DrawPolygon = function (vertices, vertexCount, color) {
      if (!vertexCount) return;
      var s = this.m_ctx;
      var drawScale = this.m_drawScale;
      s.beginPath();
      s.strokeStyle = this._color(color.color, this.m_alpha);
      s.moveTo(vertices[0].x * drawScale, vertices[0].y * drawScale);
      for (var i = 1; i < vertexCount; i++) {
         s.lineTo(vertices[i].x * drawScale, vertices[i].y * drawScale);
      }
      s.lineTo(vertices[0].x * drawScale, vertices[0].y * drawScale);
      s.closePath();
      s.stroke();
   };
   b2DebugDraw.prototype.DrawSolidPolygon = function (vertices, vertexCount, color) {
      if (!vertexCount) return;
      var s = this.m_ctx;
      var drawScale = this.m_drawScale;
      s.beginPath();
      s.strokeStyle = this._color(color.color, this.m_alpha);
      s.fillStyle = this._color(color.color, this.m_fillAlpha);
      s.moveTo(vertices[0].x * drawScale, vertices[0].y * drawScale);
      for (var i = 1; i < vertexCount; i++) {
         s.lineTo(vertices[i].x * drawScale, vertices[i].y * drawScale);
      }
      s.lineTo(vertices[0].x * drawScale, vertices[0].y * drawScale);
      s.closePath();
      s.fill();
      s.stroke();
   };
   b2DebugDraw.prototype.DrawCircle = function (center, radius, color) {
      if (!radius) return;
      var s = this.m_ctx;
      var drawScale = this.m_drawScale;
      s.beginPath();
      s.strokeStyle = this._color(color.color, this.m_alpha);
      s.arc(center.x * drawScale, center.y * drawScale, radius * drawScale, 0, Math.PI * 2, true);
      s.closePath();
      s.stroke();
   };
   b2DebugDraw.prototype.DrawSolidCircle = function (center, radius, axis, color) {
      if (!radius) return;
      var s = this.m_ctx,
         drawScale = this.m_drawScale,
         cx = center.x * drawScale,
         cy = center.y * drawScale;
      s.moveTo(0, 0);
      s.beginPath();
      s.strokeStyle = this._color(color.color, this.m_alpha);
      s.fillStyle = this._color(color.color, this.m_fillAlpha);
      s.arc(cx, cy, radius * drawScale, 0, Math.PI * 2, true);
      s.moveTo(cx, cy);
      s.lineTo((center.x + axis.x * radius) * drawScale, (center.y + axis.y * radius) * drawScale);
      s.closePath();
      s.fill();
      s.stroke();
   };
   b2DebugDraw.prototype.DrawSegment = function (p1, p2, color) {
      var s = this.m_ctx,
         drawScale = this.m_drawScale;
      s.strokeStyle = this._color(color.color, this.m_alpha);
      s.beginPath();
      s.moveTo(p1.x * drawScale, p1.y * drawScale);
      s.lineTo(p2.x * drawScale, p2.y * drawScale);
      s.closePath();
      s.stroke();
   };
   b2DebugDraw.prototype.DrawTransform = function (xf) {
      var s = this.m_ctx,
         drawScale = this.m_drawScale;
      s.beginPath();
      s.strokeStyle = this._color(0xff0000, this.m_alpha);
      s.moveTo(xf.position.x * drawScale, xf.position.y * drawScale);
      s.lineTo((xf.position.x + this.m_xformScale * xf.R.col1.x) * drawScale, (xf.position.y + this.m_xformScale * xf.R.col1.y) * drawScale);

      s.strokeStyle = this._color(0xff00, this.m_alpha);
      s.moveTo(xf.position.x * drawScale, xf.position.y * drawScale);
      s.lineTo((xf.position.x + this.m_xformScale * xf.R.col2.x) * drawScale, (xf.position.y + this.m_xformScale * xf.R.col2.y) * drawScale);
      s.closePath();
      s.stroke();
   };
})(); //post-definitions
var i;
for (i = 0; i < Box2D.postDefs.length; ++i) Box2D.postDefs[i]();
delete Box2D.postDefs;

dat.gui.js

/**
 * dat-gui JavaScript Controller Library
 * http://code.google.com/p/dat-gui
 *
 * Copyright 2011 Data Arts Team, Google Creative Lab
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 */

/** @namespace */
var dat = dat || {};

/** @namespace */
dat.gui = dat.gui || {};

/** @namespace */
dat.utils = dat.utils || {};

/** @namespace */
dat.controllers = dat.controllers || {};

/** @namespace */
dat.dom = dat.dom || {};

/** @namespace */
dat.color = dat.color || {};

dat.utils.css = (function () {
  return {
    load: function (url, doc) {
      doc = doc || document;
      var link = doc.createElement('link');
      link.type = 'text/css';
      link.rel = 'stylesheet';
      link.href = url;
      doc.getElementsByTagName('head')[0].appendChild(link);
    },
    inject: function(css, doc) {
      doc = doc || document;
      var injected = document.createElement('style');
      injected.type = 'text/css';
      injected.innerHTML = css;
      doc.getElementsByTagName('head')[0].appendChild(injected);
    }
  }
})();


dat.utils.common = (function () {
  
  var ARR_EACH = Array.prototype.forEach;
  var ARR_SLICE = Array.prototype.slice;

  /**
   * Band-aid methods for things that should be a lot easier in JavaScript.
   * Implementation and structure inspired by underscore.js
   * http://documentcloud.github.com/underscore/
   */

  return { 
    
    BREAK: {},
  
    extend: function(target) {
      
      this.each(ARR_SLICE.call(arguments, 1), function(obj) {
        
        for (var key in obj)
          if (!this.isUndefined(obj[key])) 
            target[key] = obj[key];
        
      }, this);
      
      return target;
      
    },
    
    defaults: function(target) {
      
      this.each(ARR_SLICE.call(arguments, 1), function(obj) {
        
        for (var key in obj)
          if (this.isUndefined(target[key])) 
            target[key] = obj[key];
        
      }, this);
      
      return target;
    
    },
    
    compose: function() {
      var toCall = ARR_SLICE.call(arguments);
            return function() {
              var args = ARR_SLICE.call(arguments);
              for (var i = toCall.length -1; i >= 0; i--) {
                args = [toCall[i].apply(this, args)];
              }
              return args[0];
            }
    },
    
    each: function(obj, itr, scope) {

      
      if (ARR_EACH && obj.forEach === ARR_EACH) { 
        
        obj.forEach(itr, scope);
        
      } else if (obj.length === obj.length + 0) { // Is number but not NaN
        
        for (var key = 0, l = obj.length; key < l; key++)
          if (key in obj && itr.call(scope, obj[key], key) === this.BREAK) 
            return;
            
      } else {

        for (var key in obj) 
          if (itr.call(scope, obj[key], key) === this.BREAK)
            return;
            
      }
            
    },
    
    defer: function(fnc) {
      setTimeout(fnc, 0);
    },
    
    toArray: function(obj) {
      if (obj.toArray) return obj.toArray();
      return ARR_SLICE.call(obj);
    },

    isUndefined: function(obj) {
      return obj === undefined;
    },
    
    isNull: function(obj) {
      return obj === null;
    },
    
    isNaN: function(obj) {
      return obj !== obj;
    },
    
    isArray: Array.isArray || function(obj) {
      return obj.constructor === Array;
    },
    
    isObject: function(obj) {
      return obj === Object(obj);
    },
    
    isNumber: function(obj) {
      return obj === obj+0;
    },
    
    isString: function(obj) {
      return obj === obj+'';
    },
    
    isBoolean: function(obj) {
      return obj === false || obj === true;
    },
    
    isFunction: function(obj) {
      return Object.prototype.toString.call(obj) === '[object Function]';
    }
  
  };
    
})();


dat.controllers.Controller = (function (common) {

  /**
   * @class An "abstract" class that represents a given property of an object.
   *
   * @param {Object} object The object to be manipulated
   * @param {string} property The name of the property to be manipulated
   *
   * @member dat.controllers
   */
  var Controller = function(object, property) {

    this.initialValue = object[property];

    /**
     * Those who extend this class will put their DOM elements in here.
     * @type {DOMElement}
     */
    this.domElement = document.createElement('div');

    /**
     * The object to manipulate
     * @type {Object}
     */
    this.object = object;

    /**
     * The name of the property to manipulate
     * @type {String}
     */
    this.property = property;

    /**
     * The function to be called on change.
     * @type {Function}
     * @ignore
     */
    this.__onChange = undefined;

    /**
     * The function to be called on finishing change.
     * @type {Function}
     * @ignore
     */
    this.__onFinishChange = undefined;

  };

  common.extend(

      Controller.prototype,

      /** @lends dat.controllers.Controller.prototype */
      {

        /**
         * Specify that a function fire every time someone changes the value with
         * this Controller.
         *
         * @param {Function} fnc This function will be called whenever the value
         * is modified via this Controller.
         * @returns {dat.controllers.Controller} this
         */
        onChange: function(fnc) {
          this.__onChange = fnc;
          return this;
        },

        /**
         * Specify that a function fire every time someone "finishes" changing
         * the value wih this Controller. Useful for values that change
         * incrementally like numbers or strings.
         *
         * @param {Function} fnc This function will be called whenever
         * someone "finishes" changing the value via this Controller.
         * @returns {dat.controllers.Controller} this
         */
        onFinishChange: function(fnc) {
          this.__onFinishChange = fnc;
          return this;
        },

        /**
         * Change the value of <code>object[property]</code>
         *
         * @param {Object} newValue The new value of <code>object[property]</code>
         */
        setValue: function(newValue) {
          this.object[this.property] = newValue;
          if (this.__onChange) {
            this.__onChange.call(this, newValue);
          }
          this.updateDisplay();
          return this;
        },

        /**
         * Gets the value of <code>object[property]</code>
         *
         * @returns {Object} The current value of <code>object[property]</code>
         */
        getValue: function() {
          return this.object[this.property];
        },

        /**
         * Refreshes the visual display of a Controller in order to keep sync
         * with the object's current value.
         * @returns {dat.controllers.Controller} this
         */
        updateDisplay: function() {
          return this;
        },

        /**
         * @returns {Boolean} true if the value has deviated from initialValue
         */
        isModified: function() {
          return this.initialValue !== this.getValue()
        }

      }

  );

  return Controller;


})(dat.utils.common);


dat.dom.dom = (function (common) {

  var EVENT_MAP = {
    'HTMLEvents': ['change'],
    'MouseEvents': ['click','mousemove','mousedown','mouseup', 'mouseover'],
    'KeyboardEvents': ['keydown']
  };

  var EVENT_MAP_INV = {};
  common.each(EVENT_MAP, function(v, k) {
    common.each(v, function(e) {
      EVENT_MAP_INV[e] = k;
    });
  });

  var CSS_VALUE_PIXELS = /(\d+(\.\d+)?)px/;

  function cssValueToPixels(val) {

    if (val === '0' || common.isUndefined(val)) return 0;

    var match = val.match(CSS_VALUE_PIXELS);

    if (!common.isNull(match)) {
      return parseFloat(match[1]);
    }

    // TODO ...ems? %?

    return 0;

  }

  /**
   * @namespace
   * @member dat.dom
   */
  var dom = {

    /**
     * 
     * @param elem
     * @param selectable
     */
    makeSelectable: function(elem, selectable) {

      if (elem === undefined || elem.style === undefined) return;

      elem.onselectstart = selectable ? function() {
        return false;
      } : function() {
      };

      elem.style.MozUserSelect = selectable ? 'auto' : 'none';
      elem.style.KhtmlUserSelect = selectable ? 'auto' : 'none';
      elem.unselectable = selectable ? 'on' : 'off';

    },

    /**
     *
     * @param elem
     * @param horizontal
     * @param vertical
     */
    makeFullscreen: function(elem, horizontal, vertical) {

      if (common.isUndefined(horizontal)) horizontal = true;
      if (common.isUndefined(vertical)) vertical = true;

      elem.style.position = 'absolute';

      if (horizontal) {
        elem.style.left = 0;
        elem.style.right = 0;
      }
      if (vertical) {
        elem.style.top = 0;
        elem.style.bottom = 0;
      }

    },

    /**
     *
     * @param elem
     * @param eventType
     * @param params
     */
    fakeEvent: function(elem, eventType, params, aux) {
      params = params || {};
      var className = EVENT_MAP_INV[eventType];
      if (!className) {
        throw new Error('Event type ' + eventType + ' not supported.');
      }
      var evt = document.createEvent(className);
      switch (className) {
        case 'MouseEvents':
          var clientX = params.x || params.clientX || 0;
          var clientY = params.y || params.clientY || 0;
          evt.initMouseEvent(eventType, params.bubbles || false,
              params.cancelable || true, window, params.clickCount || 1,
              0, //screen X
              0, //screen Y
              clientX, //client X
              clientY, //client Y
              false, false, false, false, 0, null);
          break;
        case 'KeyboardEvents':
          var init = evt.initKeyboardEvent || evt.initKeyEvent; // webkit || moz
          common.defaults(params, {
            cancelable: true,
            ctrlKey: false,
            altKey: false,
            shiftKey: false,
            metaKey: false,
            keyCode: undefined,
            charCode: undefined
          });
          init(eventType, params.bubbles || false,
              params.cancelable, window,
              params.ctrlKey, params.altKey,
              params.shiftKey, params.metaKey,
              params.keyCode, params.charCode);
          break;
        default:
          evt.initEvent(eventType, params.bubbles || false,
              params.cancelable || true);
          break;
      }
      common.defaults(evt, aux);
      elem.dispatchEvent(evt);
    },

    /**
     *
     * @param elem
     * @param event
     * @param func
     * @param bool
     */
    bind: function(elem, event, func, bool) {
      bool = bool || false;
      if (elem.addEventListener)
        elem.addEventListener(event, func, bool);
      else if (elem.attachEvent)
        elem.attachEvent('on' + event, func);
      return dom;
    },

    /**
     *
     * @param elem
     * @param event
     * @param func
     * @param bool
     */
    unbind: function(elem, event, func, bool) {
      bool = bool || false;
      if (elem.removeEventListener)
        elem.removeEventListener(event, func, bool);
      else if (elem.detachEvent)
        elem.detachEvent('on' + event, func);
      return dom;
    },

    /**
     *
     * @param elem
     * @param className
     */
    addClass: function(elem, className) {
      if (elem.className === undefined) {
        elem.className = className;
      } else if (elem.className !== className) {
        var classes = elem.className.split(/ +/);
        if (classes.indexOf(className) == -1) {
          classes.push(className);
          elem.className = classes.join(' ').replace(/^\s+/, '').replace(/\s+$/, '');
        }
      }
      return dom;
    },

    /**
     *
     * @param elem
     * @param className
     */
    removeClass: function(elem, className) {
      if (className) {
        if (elem.className === undefined) {
          // elem.className = className;
        } else if (elem.className === className) {
          elem.removeAttribute('class');
        } else {
          var classes = elem.className.split(/ +/);
          var index = classes.indexOf(className);
          if (index != -1) {
            classes.splice(index, 1);
            elem.className = classes.join(' ');
          }
        }
      } else {
        elem.className = undefined;
      }
      return dom;
    },

    hasClass: function(elem, className) {
      return new RegExp('(?:^|\\s+)' + className + '(?:\\s+|$)').test(elem.className) || false;
    },

    /**
     *
     * @param elem
     */
    getWidth: function(elem) {

      var style = getComputedStyle(elem);

      return cssValueToPixels(style['border-left-width']) +
          cssValueToPixels(style['border-right-width']) +
          cssValueToPixels(style['padding-left']) +
          cssValueToPixels(style['padding-right']) +
          cssValueToPixels(style['width']);
    },

    /**
     *
     * @param elem
     */
    getHeight: function(elem) {

      var style = getComputedStyle(elem);

      return cssValueToPixels(style['border-top-width']) +
          cssValueToPixels(style['border-bottom-width']) +
          cssValueToPixels(style['padding-top']) +
          cssValueToPixels(style['padding-bottom']) +
          cssValueToPixels(style['height']);
    },

    /**
     *
     * @param elem
     */
    getOffset: function(elem) {
      var offset = {left: 0, top:0};
      if (elem.offsetParent) {
        do {
          offset.left += elem.offsetLeft;
          offset.top += elem.offsetTop;
        } while (elem = elem.offsetParent);
      }
      return offset;
    },

    // http://stackoverflow.com/posts/2684561/revisions
    /**
     * 
     * @param elem
     */
    isActive: function(elem) {
      return elem === document.activeElement && ( elem.type || elem.href );
    }

  };

  return dom;

})(dat.utils.common);


dat.controllers.OptionController = (function (Controller, dom, common) {

  /**
   * @class Provides a select input to alter the property of an object, using a
   * list of accepted values.
   *
   * @extends dat.controllers.Controller
   *
   * @param {Object} object The object to be manipulated
   * @param {string} property The name of the property to be manipulated
   * @param {Object|string[]} options A map of labels to acceptable values, or
   * a list of acceptable string values.
   *
   * @member dat.controllers
   */
  var OptionController = function(object, property, options) {

    OptionController.superclass.call(this, object, property);

    var _this = this;

    /**
     * The drop down menu
     * @ignore
     */
    this.__select = document.createElement('select');

    if (common.isArray(options)) {
      var map = {};
      common.each(options, function(element) {
        map[element] = element;
      });
      options = map;
    }

    common.each(options, function(value, key) {

      var opt = document.createElement('option');
      opt.innerHTML = key;
      opt.setAttribute('value', value);
      _this.__select.appendChild(opt);

    });

    // Acknowledge original value
    this.updateDisplay();

    dom.bind(this.__select, 'change', function() {
      var desiredValue = this.options[this.selectedIndex].value;
      _this.setValue(desiredValue);
    });

    this.domElement.appendChild(this.__select);

  };

  OptionController.superclass = Controller;

  common.extend(

      OptionController.prototype,
      Controller.prototype,

      {

        setValue: function(v) {
          var toReturn = OptionController.superclass.prototype.setValue.call(this, v);
          if (this.__onFinishChange) {
            this.__onFinishChange.call(this, this.getValue());
          }
          return toReturn;
        },

        updateDisplay: function() {
          this.__select.value = this.getValue();
          return OptionController.superclass.prototype.updateDisplay.call(this);
        }

      }

  );

  return OptionController;

})(dat.controllers.Controller,
dat.dom.dom,
dat.utils.common);


dat.controllers.NumberController = (function (Controller, common) {

  /**
   * @class Represents a given property of an object that is a number.
   *
   * @extends dat.controllers.Controller
   *
   * @param {Object} object The object to be manipulated
   * @param {string} property The name of the property to be manipulated
   * @param {Object} [params] Optional parameters
   * @param {Number} [params.min] Minimum allowed value
   * @param {Number} [params.max] Maximum allowed value
   * @param {Number} [params.step] Increment by which to change value
   *
   * @member dat.controllers
   */
  var NumberController = function(object, property, params) {

    NumberController.superclass.call(this, object, property);

    params = params || {};

    this.__min = params.min;
    this.__max = params.max;
    this.__step = params.step;

    if (common.isUndefined(this.__step)) {

      if (this.initialValue == 0) {
        this.__impliedStep = 1; // What are we, psychics?
      } else {
        // Hey Doug, check this out.
        this.__impliedStep = Math.pow(10, Math.floor(Math.log(this.initialValue)/Math.LN10))/10;
      }

    } else {

    	this.__impliedStep = this.__step;

    }

    this.__precision = numDecimals(this.__impliedStep);


  };

  NumberController.superclass = Controller;

  common.extend(

      NumberController.prototype,
      Controller.prototype,

      /** @lends dat.controllers.NumberController.prototype */
      {

        setValue: function(v) {

          if (this.__min !== undefined && v < this.__min) {
            v = this.__min;
          } else if (this.__max !== undefined && v > this.__max) {
            v = this.__max;
          }

          if (this.__step !== undefined && v % this.__step != 0) {
            v = Math.round(v / this.__step) * this.__step;
          }

          return NumberController.superclass.prototype.setValue.call(this, v);

        },

        /**
         * Specify a minimum value for <code>object[property]</code>.
         *
         * @param {Number} minValue The minimum value for
         * <code>object[property]</code>
         * @returns {dat.controllers.NumberController} this
         */
        min: function(v) {
          this.__min = v;
          return this;
        },

        /**
         * Specify a maximum value for <code>object[property]</code>.
         *
         * @param {Number} maxValue The maximum value for
         * <code>object[property]</code>
         * @returns {dat.controllers.NumberController} this
         */
        max: function(v) {
          this.__max = v;
          return this;
        },

        /**
         * Specify a step value that dat.controllers.NumberController
         * increments by.
         *
         * @param {Number} stepValue The step value for
         * dat.controllers.NumberController
         * @default if minimum and maximum specified increment is 1% of the
         * difference otherwise stepValue is 1
         * @returns {dat.controllers.NumberController} this
         */
        step: function(v) {
          this.__step = v;
          return this;
        }

      }

  );

  function numDecimals(x) {
    x = x.toString();
    if (x.indexOf('.') > -1) {
      return x.length - x.indexOf('.') - 1;
    } else {
      return 0;
    }
  }

  return NumberController;

})(dat.controllers.Controller,
dat.utils.common);


dat.controllers.NumberControllerBox = (function (NumberController, dom, common) {

  /**
   * @class Represents a given property of an object that is a number and
   * provides an input element with which to manipulate it.
   *
   * @extends dat.controllers.Controller
   * @extends dat.controllers.NumberController
   *
   * @param {Object} object The object to be manipulated
   * @param {string} property The name of the property to be manipulated
   * @param {Object} [params] Optional parameters
   * @param {Number} [params.min] Minimum allowed value
   * @param {Number} [params.max] Maximum allowed value
   * @param {Number} [params.step] Increment by which to change value
   *
   * @member dat.controllers
   */
  var NumberControllerBox = function(object, property, params) {

    this.__truncationSuspended = false;

    NumberControllerBox.superclass.call(this, object, property, params);

    var _this = this;

    /**
     * {Number} Previous mouse y position
     * @ignore
     */
    var prev_y;

    this.__input = document.createElement('input');
    this.__input.setAttribute('type', 'text');

    // Makes it so manually specified values are not truncated.

    dom.bind(this.__input, 'change', onChange);
    dom.bind(this.__input, 'blur', onBlur);
    dom.bind(this.__input, 'mousedown', onMouseDown);
    dom.bind(this.__input, 'keydown', function(e) {

      // When pressing entire, you can be as precise as you want.
      if (e.keyCode === 13) {
        _this.__truncationSuspended = true;
        this.blur();
        _this.__truncationSuspended = false;
      }

    });

    function onChange() {
      var attempted = parseFloat(_this.__input.value);
      if (!common.isNaN(attempted)) _this.setValue(attempted);
    }

    function onBlur() {
      onChange();
      if (_this.__onFinishChange) {
        _this.__onFinishChange.call(_this, _this.getValue());
      }
    }

    function onMouseDown(e) {
      dom.bind(window, 'mousemove', onMouseDrag);
      dom.bind(window, 'mouseup', onMouseUp);
      prev_y = e.clientY;
    }

    function onMouseDrag(e) {

      var diff = prev_y - e.clientY;
      _this.setValue(_this.getValue() + diff * _this.__impliedStep);

      prev_y = e.clientY;

    }

    function onMouseUp() {
      dom.unbind(window, 'mousemove', onMouseDrag);
      dom.unbind(window, 'mouseup', onMouseUp);
    }

    this.updateDisplay();

    this.domElement.appendChild(this.__input);

  };

  NumberControllerBox.superclass = NumberController;

  common.extend(

      NumberControllerBox.prototype,
      NumberController.prototype,

      {

        updateDisplay: function() {

          this.__input.value = this.__truncationSuspended ? this.getValue() : roundToDecimal(this.getValue(), this.__precision);
          return NumberControllerBox.superclass.prototype.updateDisplay.call(this);
        }

      }

  );

  function roundToDecimal(value, decimals) {
    var tenTo = Math.pow(10, decimals);
    return Math.round(value * tenTo) / tenTo;
  }

  return NumberControllerBox;

})(dat.controllers.NumberController,
dat.dom.dom,
dat.utils.common);


dat.controllers.NumberControllerSlider = (function (NumberController, dom, css, common, styleSheet) {

  /**
   * @class Represents a given property of an object that is a number, contains
   * a minimum and maximum, and provides a slider element with which to
   * manipulate it. It should be noted that the slider element is made up of
   * <code>&lt;div&gt;</code> tags, <strong>not</strong> the html5
   * <code>&lt;slider&gt;</code> element.
   *
   * @extends dat.controllers.Controller
   * @extends dat.controllers.NumberController
   * 
   * @param {Object} object The object to be manipulated
   * @param {string} property The name of the property to be manipulated
   * @param {Number} minValue Minimum allowed value
   * @param {Number} maxValue Maximum allowed value
   * @param {Number} stepValue Increment by which to change value
   *
   * @member dat.controllers
   */
  var NumberControllerSlider = function(object, property, min, max, step) {

    NumberControllerSlider.superclass.call(this, object, property, { min: min, max: max, step: step });

    var _this = this;

    this.__background = document.createElement('div');
    this.__foreground = document.createElement('div');
    


    dom.bind(this.__background, 'mousedown', onMouseDown);
    
    dom.addClass(this.__background, 'slider');
    dom.addClass(this.__foreground, 'slider-fg');

    function onMouseDown(e) {

      dom.bind(window, 'mousemove', onMouseDrag);
      dom.bind(window, 'mouseup', onMouseUp);

      onMouseDrag(e);
    }

    function onMouseDrag(e) {

      e.preventDefault();

      var offset = dom.getOffset(_this.__background);
      var width = dom.getWidth(_this.__background);
      
      _this.setValue(
      	map(e.clientX, offset.left, offset.left + width, _this.__min, _this.__max)
      );

      return false;

    }

    function onMouseUp() {
      dom.unbind(window, 'mousemove', onMouseDrag);
      dom.unbind(window, 'mouseup', onMouseUp);
      if (_this.__onFinishChange) {
        _this.__onFinishChange.call(_this, _this.getValue());
      }
    }

    this.updateDisplay();

    this.__background.appendChild(this.__foreground);
    this.domElement.appendChild(this.__background);

  };

  NumberControllerSlider.superclass = NumberController;

  /**
   * Injects default stylesheet for slider elements.
   */
  NumberControllerSlider.useDefaultStyles = function() {
    css.inject(styleSheet);
  };

  common.extend(

      NumberControllerSlider.prototype,
      NumberController.prototype,

      {

        updateDisplay: function() {
          var pct = (this.getValue() - this.__min)/(this.__max - this.__min);
          this.__foreground.style.width = pct*100+'%';
          return NumberControllerSlider.superclass.prototype.updateDisplay.call(this);
        }

      }



  );

	function map(v, i1, i2, o1, o2) {
		return o1 + (o2 - o1) * ((v - i1) / (i2 - i1));
	}

  return NumberControllerSlider;
  
})(dat.controllers.NumberController,
dat.dom.dom,
dat.utils.css,
dat.utils.common,
".slider {\n  box-shadow: inset 0 2px 4px rgba(0,0,0,0.15);\n  height: 1em;\n  border-radius: 1em;\n  background-color: #eee;\n  padding: 0 0.5em;\n  overflow: hidden;\n}\n\n.slider-fg {\n  padding: 1px 0 2px 0;\n  background-color: #aaa;\n  height: 1em;\n  margin-left: -0.5em;\n  padding-right: 0.5em;\n  border-radius: 1em 0 0 1em;\n}\n\n.slider-fg:after {\n  display: inline-block;\n  border-radius: 1em;\n  background-color: #fff;\n  border:  1px solid #aaa;\n  content: '';\n  float: right;\n  margin-right: -1em;\n  margin-top: -1px;\n  height: 0.9em;\n  width: 0.9em;\n}");


dat.controllers.FunctionController = (function (Controller, dom, common) {

  /**
   * @class Provides a GUI interface to fire a specified method, a property of an object.
   *
   * @extends dat.controllers.Controller
   *
   * @param {Object} object The object to be manipulated
   * @param {string} property The name of the property to be manipulated
   *
   * @member dat.controllers
   */
  var FunctionController = function(object, property, text) {

    FunctionController.superclass.call(this, object, property);

    var _this = this;

    this.__button = document.createElement('div');
    this.__button.innerHTML = text === undefined ? 'Fire' : text;
    dom.bind(this.__button, 'click', function(e) {
      e.preventDefault();
      _this.fire();
      return false;
    });

    dom.addClass(this.__button, 'button');

    this.domElement.appendChild(this.__button);


  };

  FunctionController.superclass = Controller;

  common.extend(

      FunctionController.prototype,
      Controller.prototype,
      {
        
        fire: function() {
          if (this.__onChange) {
            this.__onChange.call(this);
          }
          if (this.__onFinishChange) {
            this.__onFinishChange.call(this, this.getValue());
          }
          this.getValue().call(this.object);
        }
      }

  );

  return FunctionController;

})(dat.controllers.Controller,
dat.dom.dom,
dat.utils.common);


dat.controllers.BooleanController = (function (Controller, dom, common) {

  /**
   * @class Provides a checkbox input to alter the boolean property of an object.
   * @extends dat.controllers.Controller
   *
   * @param {Object} object The object to be manipulated
   * @param {string} property The name of the property to be manipulated
   *
   * @member dat.controllers
   */
  var BooleanController = function(object, property) {

    BooleanController.superclass.call(this, object, property);

    var _this = this;
    this.__prev = this.getValue();

    this.__checkbox = document.createElement('input');
    this.__checkbox.setAttribute('type', 'checkbox');


    dom.bind(this.__checkbox, 'change', onChange, false);

    this.domElement.appendChild(this.__checkbox);

    // Match original value
    this.updateDisplay();

    function onChange() {
      _this.setValue(!_this.__prev);
    }

  };

  BooleanController.superclass = Controller;

  common.extend(

      BooleanController.prototype,
      Controller.prototype,

      {

        setValue: function(v) {
          var toReturn = BooleanController.superclass.prototype.setValue.call(this, v);
          if (this.__onFinishChange) {
            this.__onFinishChange.call(this, this.getValue());
          }
          this.__prev = this.getValue();
          return toReturn;
        },

        updateDisplay: function() {
          
          if (this.getValue() === true) {
            this.__checkbox.setAttribute('checked', 'checked');
            this.__checkbox.checked = true;    
          } else {
              this.__checkbox.checked = false;
          }

          return BooleanController.superclass.prototype.updateDisplay.call(this);

        }


      }

  );

  return BooleanController;

})(dat.controllers.Controller,
dat.dom.dom,
dat.utils.common);


dat.color.toString = (function (common) {

  return function(color) {

    if (color.a == 1 || common.isUndefined(color.a)) {

      var s = color.hex.toString(16);
      while (s.length < 6) {
        s = '0' + s;
      }

      return '#' + s;

    } else {

      return 'rgba(' + Math.round(color.r) + ',' + Math.round(color.g) + ',' + Math.round(color.b) + ',' + color.a + ')';

    }

  }

})(dat.utils.common);


dat.color.interpret = (function (toString, common) {

  var result, toReturn;

  var interpret = function() {

    toReturn = false;

    var original = arguments.length > 1 ? common.toArray(arguments) : arguments[0];

    common.each(INTERPRETATIONS, function(family) {

      if (family.litmus(original)) {

        common.each(family.conversions, function(conversion, conversionName) {

          result = conversion.read(original);

          if (toReturn === false && result !== false) {
            toReturn = result;
            result.conversionName = conversionName;
            result.conversion = conversion;
            return common.BREAK;

          }

        });

        return common.BREAK;

      }

    });

    return toReturn;

  };

  var INTERPRETATIONS = [

    // Strings
    {

      litmus: common.isString,

      conversions: {

        THREE_CHAR_HEX: {

          read: function(original) {

            var test = original.match(/^#([A-F0-9])([A-F0-9])([A-F0-9])$/i);
            if (test === null) return false;

            return {
              space: 'HEX',
              hex: parseInt(
                  '0x' +
                      test[1].toString() + test[1].toString() +
                      test[2].toString() + test[2].toString() +
                      test[3].toString() + test[3].toString())
            };

          },

          write: toString

        },

        SIX_CHAR_HEX: {

          read: function(original) {

            var test = original.match(/^#([A-F0-9]{6})$/i);
            if (test === null) return false;

            return {
              space: 'HEX',
              hex: parseInt('0x' + test[1].toString())
            };

          },

          write: toString

        },

        CSS_RGB: {

          read: function(original) {

            var test = original.match(/^rgb\(\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*\)/);
            if (test === null) return false;

            return {
              space: 'RGB',
              r: parseFloat(test[1]),
              g: parseFloat(test[2]),
              b: parseFloat(test[3])
            };

          },

          write: toString

        },

        CSS_RGBA: {

          read: function(original) {

            var test = original.match(/^rgba\(\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*\,\s*(.+)\s*\)/);
            if (test === null) return false;

            return {
              space: 'RGB',
              r: parseFloat(test[1]),
              g: parseFloat(test[2]),
              b: parseFloat(test[3]),
              a: parseFloat(test[4])
            };

          },

          write: toString

        }

      }

    },

    // Numbers
    {

      litmus: common.isNumber,

      conversions: {

        HEX: {
          read: function(original) {
            return {
              space: 'HEX',
              hex: original,
              conversionName: 'HEX'
            }
          },

          write: function(color) {
            return color.hex;
          }
        }

      }

    },

    // Arrays
    {

      litmus: common.isArray,

      conversions: {

        RGB_ARRAY: {
          read: function(original) {
            if (original.length != 3) return false;
            return {
              space: 'RGB',
              r: original[0],
              g: original[1],
              b: original[2]
            };
          },

          write: function(color) {
            return [color.r, color.g, color.b];
          }

        },

        RGBA_ARRAY: {
          read: function(original) {
            if (original.length != 4) return false;
            return {
              space: 'RGB',
              r: original[0],
              g: original[1],
              b: original[2],
              a: original[3]
            };
          },

          write: function(color) {
            return [color.r, color.g, color.b, color.a];
          }

        }

      }

    },

    // Objects
    {

      litmus: common.isObject,

      conversions: {

        RGBA_OBJ: {
          read: function(original) {
            if (common.isNumber(original.r) &&
                common.isNumber(original.g) &&
                common.isNumber(original.b) &&
                common.isNumber(original.a)) {
              return {
                space: 'RGB',
                r: original.r,
                g: original.g,
                b: original.b,
                a: original.a
              }
            }
            return false;
          },

          write: function(color) {
            return {
              r: color.r,
              g: color.g,
              b: color.b,
              a: color.a
            }
          }
        },

        RGB_OBJ: {
          read: function(original) {
            if (common.isNumber(original.r) &&
                common.isNumber(original.g) &&
                common.isNumber(original.b)) {
              return {
                space: 'RGB',
                r: original.r,
                g: original.g,
                b: original.b
              }
            }
            return false;
          },

          write: function(color) {
            return {
              r: color.r,
              g: color.g,
              b: color.b
            }
          }
        },

        HSVA_OBJ: {
          read: function(original) {
            if (common.isNumber(original.h) &&
                common.isNumber(original.s) &&
                common.isNumber(original.v) &&
                common.isNumber(original.a)) {
              return {
                space: 'HSV',
                h: original.h,
                s: original.s,
                v: original.v,
                a: original.a
              }
            }
            return false;
          },

          write: function(color) {
            return {
              h: color.h,
              s: color.s,
              v: color.v,
              a: color.a
            }
          }
        },

        HSV_OBJ: {
          read: function(original) {
            if (common.isNumber(original.h) &&
                common.isNumber(original.s) &&
                common.isNumber(original.v)) {
              return {
                space: 'HSV',
                h: original.h,
                s: original.s,
                v: original.v
              }
            }
            return false;
          },

          write: function(color) {
            return {
              h: color.h,
              s: color.s,
              v: color.v
            }
          }

        }

      }

    }


  ];

  return interpret;


})(dat.color.toString,
dat.utils.common);


dat.GUI = dat.gui.GUI = (function (css, saveDialogueContents, styleSheet, controllerFactory, Controller, BooleanController, FunctionController, NumberControllerBox, NumberControllerSlider, OptionController, ColorController, requestAnimationFrame, CenteredDiv, dom, common) {

  css.inject(styleSheet);

  /** Outer-most className for GUI's */
  var CSS_NAMESPACE = 'dg';

  var HIDE_KEY_CODE = 72;

  /** The only value shared between the JS and SCSS. Use caution. */
  var CLOSE_BUTTON_HEIGHT = 20;

  var DEFAULT_DEFAULT_PRESET_NAME = 'Default';

  var SUPPORTS_LOCAL_STORAGE = (function() {
    try {
      return 'localStorage' in window && window['localStorage'] !== null;
    } catch (e) {
      return false;
    }
  })();

  var SAVE_DIALOGUE;

  /** Have we yet to create an autoPlace GUI? */
  var auto_place_virgin = true;

  /** Fixed position div that auto place GUI's go inside */
  var auto_place_container;

  /** Are we hiding the GUI's ? */
  var hide = false;

  /** GUI's which should be hidden */
  var hideable_guis = [];

  /**
   * A lightweight controller library for JavaScript. It allows you to easily
   * manipulate variables and fire functions on the fly.
   * @class
   *
   * @member dat.gui
   *
   * @param {Object} [params]
   * @param {String} [params.name] The name of this GUI.
   * @param {Object} [params.load] JSON object representing the saved state of
   * this GUI.
   * @param {Boolean} [params.auto=true]
   * @param {dat.gui.GUI} [params.parent] The GUI I'm nested in.
   * @param {Boolean} [params.closed] If true, starts closed
   */
  var GUI = function(params) {

    var _this = this;

    /**
     * Outermost DOM Element
     * @type DOMElement
     */
    this.domElement = document.createElement('div');
    this.__ul = document.createElement('ul');
    this.domElement.appendChild(this.__ul);

    dom.addClass(this.domElement, CSS_NAMESPACE);

    /**
     * Nested GUI's by name
     * @ignore
     */
    this.__folders = {};

    this.__controllers = [];

    /**
     * List of objects I'm remembering for save, only used in top level GUI
     * @ignore
     */
    this.__rememberedObjects = [];

    /**
     * Maps the index of remembered objects to a map of controllers, only used
     * in top level GUI.
     *
     * @private
     * @ignore
     *
     * @example
     * [
     *  {
     *    propertyName: Controller,
     *    anotherPropertyName: Controller
     *  },
     *  {
     *    propertyName: Controller
     *  }
     * ]
     */
    this.__rememberedObjectIndecesToControllers = [];

    this.__listening = [];

    params = params || {};

    // Default parameters
    params = common.defaults(params, {
      autoPlace: true,
      width: GUI.DEFAULT_WIDTH
    });

    params = common.defaults(params, {
      resizable: params.autoPlace,
      hideable: params.autoPlace
    });


    if (!common.isUndefined(params.load)) {

      // Explicit preset
      if (params.preset) params.load.preset = params.preset;

    } else {

      params.load = { preset: DEFAULT_DEFAULT_PRESET_NAME };

    }

    if (common.isUndefined(params.parent) && params.hideable) {
      hideable_guis.push(this);
    }

    // Only root level GUI's are resizable.
    params.resizable = common.isUndefined(params.parent) && params.resizable;


    if (params.autoPlace && common.isUndefined(params.scrollable)) {
      params.scrollable = true;
    }
//    params.scrollable = common.isUndefined(params.parent) && params.scrollable === true;

    // Not part of params because I don't want people passing this in via
    // constructor. Should be a 'remembered' value.
    var use_local_storage =
        SUPPORTS_LOCAL_STORAGE &&
            localStorage.getItem(getLocalStorageHash(this, 'isLocal')) === 'true';

    Object.defineProperties(this,

        /** @lends dat.gui.GUI.prototype */
        {

          /**
           * The parent <code>GUI</code>
           * @type dat.gui.GUI
           */
          parent: {
            get: function() {
              return params.parent;
            }
          },

          scrollable: {
            get: function() {
              return params.scrollable;
            }
          },

          /**
           * Handles <code>GUI</code>'s element placement for you
           * @type Boolean
           */
          autoPlace: {
            get: function() {
              return params.autoPlace;
            }
          },

          /**
           * The identifier for a set of saved values
           * @type String
           */
          preset: {

            get: function() {
              if (_this.parent) {
                return _this.getRoot().preset;
              } else {
                return params.load.preset;
              }
            },

            set: function(v) {
              if (_this.parent) {
                _this.getRoot().preset = v;
              } else {
                params.load.preset = v;
              }
              setPresetSelectIndex(this);
              _this.revert();
            }

          },

          /**
           * The width of <code>GUI</code> element
           * @type Number
           */
          width: {
            get: function() {
              return params.width;
            },
            set: function(v) {
              params.width = v;
              setWidth(_this, v);
            }
          },

          /**
           * The name of <code>GUI</code>. Used for folders. i.e
           * a folder's name
           * @type String
           */
          name: {
            get: function() {
              return params.name;
            },
            set: function(v) {
              // TODO Check for collisions among sibling folders
              params.name = v;
              if (title_row_name) {
                title_row_name.innerHTML = params.name;
              }
            }
          },

          /**
           * Whether the <code>GUI</code> is collapsed or not
           * @type Boolean
           */
          closed: {
            get: function() {
              return params.closed;
            },
            set: function(v) {
              params.closed = v;
              if (params.closed) {
                dom.addClass(_this.__ul, GUI.CLASS_CLOSED);
              } else {
                dom.removeClass(_this.__ul, GUI.CLASS_CLOSED);
              }
              // For browsers that aren't going to respect the CSS transition,
              // Lets just check our height against the window height right off
              // the bat.
              this.onResize();

              if (_this.__closeButton) {
                _this.__closeButton.innerHTML = v ? GUI.TEXT_OPEN : GUI.TEXT_CLOSED;
              }
            }
          },

          /**
           * Contains all presets
           * @type Object
           */
          load: {
            get: function() {
              return params.load;
            }
          },

          /**
           * Determines whether or not to use <a href="https://developer.mozilla.org/en/DOM/Storage#localStorage">localStorage</a> as the means for
           * <code>remember</code>ing
           * @type Boolean
           */
          useLocalStorage: {

            get: function() {
              return use_local_storage;
            },
            set: function(bool) {
              if (SUPPORTS_LOCAL_STORAGE) {
                use_local_storage = bool;
                if (bool) {
                  dom.bind(window, 'unload', saveToLocalStorage);
                } else {
                  dom.unbind(window, 'unload', saveToLocalStorage);
                }
                localStorage.setItem(getLocalStorageHash(_this, 'isLocal'), bool);
              }
            }

          }

        });

    // Are we a root level GUI?
    if (common.isUndefined(params.parent)) {

      params.closed = false;

      dom.addClass(this.domElement, GUI.CLASS_MAIN);
      dom.makeSelectable(this.domElement, false);

      // Are we supposed to be loading locally?
      if (SUPPORTS_LOCAL_STORAGE) {

        if (use_local_storage) {

          _this.useLocalStorage = true;

          var saved_gui = localStorage.getItem(getLocalStorageHash(this, 'gui'));

          if (saved_gui) {
            params.load = JSON.parse(saved_gui);
          }

        }

      }

      this.__closeButton = document.createElement('div');
      this.__closeButton.innerHTML = GUI.TEXT_CLOSED;
      dom.addClass(this.__closeButton, GUI.CLASS_CLOSE_BUTTON);
      this.domElement.appendChild(this.__closeButton);

      dom.bind(this.__closeButton, 'click', function() {

        _this.closed = !_this.closed;


      });


      // Oh, you're a nested GUI!
    } else {

      if (params.closed === undefined) {
        params.closed = true;
      }

      var title_row_name = document.createTextNode(params.name);
      dom.addClass(title_row_name, 'controller-name');

      var title_row = addRow(_this, title_row_name);

      var on_click_title = function(e) {
        e.preventDefault();
        _this.closed = !_this.closed;
        return false;
      };

      dom.addClass(this.__ul, GUI.CLASS_CLOSED);

      dom.addClass(title_row, 'title');
      dom.bind(title_row, 'click', on_click_title);

      if (!params.closed) {
        this.closed = false;
      }

    }

    if (params.autoPlace) {

      if (common.isUndefined(params.parent)) {

        if (auto_place_virgin) {
          auto_place_container = document.createElement('div');
          dom.addClass(auto_place_container, CSS_NAMESPACE);
          dom.addClass(auto_place_container, GUI.CLASS_AUTO_PLACE_CONTAINER);
          document.body.appendChild(auto_place_container);
          auto_place_virgin = false;
        }

        // Put it in the dom for you.
        auto_place_container.appendChild(this.domElement);

        // Apply the auto styles
        dom.addClass(this.domElement, GUI.CLASS_AUTO_PLACE);

      }


      // Make it not elastic.
      if (!this.parent) setWidth(_this, params.width);

    }

    dom.bind(window, 'resize', function() { _this.onResize() });
    dom.bind(this.__ul, 'webkitTransitionEnd', function() { _this.onResize(); });
    dom.bind(this.__ul, 'transitionend', function() { _this.onResize() });
    dom.bind(this.__ul, 'oTransitionEnd', function() { _this.onResize() });
    this.onResize();


    if (params.resizable) {
      addResizeHandle(this);
    }

    function saveToLocalStorage() {
      localStorage.setItem(getLocalStorageHash(_this, 'gui'), JSON.stringify(_this.getSaveObject()));
    }

    var root = _this.getRoot();
    function resetWidth() {
	      var root = _this.getRoot();
	      root.width += 1;
	      common.defer(function() {
	        root.width -= 1;
	      });
	    }

	    if (!params.parent) {
	      resetWidth();
	    }

  };

  GUI.toggleHide = function() {

    hide = !hide;
    common.each(hideable_guis, function(gui) {
      gui.domElement.style.zIndex = hide ? -999 : 999;
      gui.domElement.style.opacity = hide ? 0 : 1;
    });
  };

  GUI.CLASS_AUTO_PLACE = 'a';
  GUI.CLASS_AUTO_PLACE_CONTAINER = 'ac';
  GUI.CLASS_MAIN = 'main';
  GUI.CLASS_CONTROLLER_ROW = 'cr';
  GUI.CLASS_TOO_TALL = 'taller-than-window';
  GUI.CLASS_CLOSED = 'closed';
  GUI.CLASS_CLOSE_BUTTON = 'close-button';
  GUI.CLASS_DRAG = 'drag';

  GUI.DEFAULT_WIDTH = 245;
  GUI.TEXT_CLOSED = 'Close Controls';
  GUI.TEXT_OPEN = 'Open Controls';

  dom.bind(window, 'keydown', function(e) {

    if (document.activeElement.type !== 'text' &&
        (e.which === HIDE_KEY_CODE || e.keyCode == HIDE_KEY_CODE)) {
      GUI.toggleHide();
    }

  }, false);

  common.extend(

      GUI.prototype,

      /** @lends dat.gui.GUI */
      {

        /**
         * @param object
         * @param property
         * @returns {dat.controllers.Controller} The new controller that was added.
         * @instance
         */
        add: function(object, property) {

          return add(
              this,
              object,
              property,
              {
                factoryArgs: Array.prototype.slice.call(arguments, 2)
              }
          );

        },

        /**
         * @param object
         * @param property
         * @returns {dat.controllers.ColorController} The new controller that was added.
         * @instance
         */
        addColor: function(object, property) {

          return add(
              this,
              object,
              property,
              {
                color: true
              }
          );

        },

        /**
         * @param controller
         * @instance
         */
        remove: function(controller) {

          // TODO listening?
          this.__ul.removeChild(controller.__li);
          this.__controllers.slice(this.__controllers.indexOf(controller), 1);
          var _this = this;
          common.defer(function() {
            _this.onResize();
          });

        },

        destroy: function() {

          if (this.autoPlace) {
            auto_place_container.removeChild(this.domElement);
          }

        },

        /**
         * @param name
         * @returns {dat.gui.GUI} The new folder.
         * @throws {Error} if this GUI already has a folder by the specified
         * name
         * @instance
         */
        addFolder: function(name) {

          // We have to prevent collisions on names in order to have a key
          // by which to remember saved values
          if (this.__folders[name] !== undefined) {
            throw new Error('You already have a folder in this GUI by the' +
                ' name "' + name + '"');
          }

          var new_gui_params = { name: name, parent: this };

          // We need to pass down the autoPlace trait so that we can
          // attach event listeners to open/close folder actions to
          // ensure that a scrollbar appears if the window is too short.
          new_gui_params.autoPlace = this.autoPlace;

          // Do we have saved appearance data for this folder?

          if (this.load && // Anything loaded?
              this.load.folders && // Was my parent a dead-end?
              this.load.folders[name]) { // Did daddy remember me?

            // Start me closed if I was closed
            new_gui_params.closed = this.load.folders[name].closed;

            // Pass down the loaded data
            new_gui_params.load = this.load.folders[name];

          }

          var gui = new GUI(new_gui_params);
          this.__folders[name] = gui;

          var li = addRow(this, gui.domElement);
          dom.addClass(li, 'folder');
          return gui;

        },

        open: function() {
          this.closed = false;
        },

        close: function() {
          this.closed = true;
        },

        onResize: function() {

          var root = this.getRoot();

          if (root.scrollable) {

            var top = dom.getOffset(root.__ul).top;
            var h = 0;

            common.each(root.__ul.childNodes, function(node) {
              if (! (root.autoPlace && node === root.__save_row))
                h += dom.getHeight(node);
            });

            if (window.innerHeight - top - CLOSE_BUTTON_HEIGHT < h) {
              dom.addClass(root.domElement, GUI.CLASS_TOO_TALL);
              root.__ul.style.height = window.innerHeight - top - CLOSE_BUTTON_HEIGHT + 'px';
            } else {
              dom.removeClass(root.domElement, GUI.CLASS_TOO_TALL);
              root.__ul.style.height = 'auto';
            }

          }

          if (root.__resize_handle) {
            common.defer(function() {
              root.__resize_handle.style.height = root.__ul.offsetHeight + 'px';
            });
          }

          if (root.__closeButton) {
            root.__closeButton.style.width = root.width + 'px';
          }

        },

        /**
         * Mark objects for saving. The order of these objects cannot change as
         * the GUI grows. When remembering new objects, append them to the end
         * of the list.
         *
         * @param {Object...} objects
         * @throws {Error} if not called on a top level GUI.
         * @instance
         */
        remember: function() {

          if (common.isUndefined(SAVE_DIALOGUE)) {
            SAVE_DIALOGUE = new CenteredDiv();
            SAVE_DIALOGUE.domElement.innerHTML = saveDialogueContents;
          }

          if (this.parent) {
            throw new Error("You can only call remember on a top level GUI.");
          }

          var _this = this;

          common.each(Array.prototype.slice.call(arguments), function(object) {
            if (_this.__rememberedObjects.length == 0) {
              addSaveMenu(_this);
            }
            if (_this.__rememberedObjects.indexOf(object) == -1) {
              _this.__rememberedObjects.push(object);
            }
          });

          if (this.autoPlace) {
            // Set save row width
            setWidth(this, this.width);
          }

        },

        /**
         * @returns {dat.gui.GUI} the topmost parent GUI of a nested GUI.
         * @instance
         */
        getRoot: function() {
          var gui = this;
          while (gui.parent) {
            gui = gui.parent;
          }
          return gui;
        },

        /**
         * @returns {Object} a JSON object representing the current state of
         * this GUI as well as its remembered properties.
         * @instance
         */
        getSaveObject: function() {

          var toReturn = this.load;

          toReturn.closed = this.closed;

          // Am I remembering any values?
          if (this.__rememberedObjects.length > 0) {

            toReturn.preset = this.preset;

            if (!toReturn.remembered) {
              toReturn.remembered = {};
            }

            toReturn.remembered[this.preset] = getCurrentPreset(this);

          }

          toReturn.folders = {};
          common.each(this.__folders, function(element, key) {
            toReturn.folders[key] = element.getSaveObject();
          });

          return toReturn;

        },

        save: function() {

          if (!this.load.remembered) {
            this.load.remembered = {};
          }

          this.load.remembered[this.preset] = getCurrentPreset(this);
          markPresetModified(this, false);

        },

        saveAs: function(presetName) {

          if (!this.load.remembered) {

            // Retain default values upon first save
            this.load.remembered = {};
            this.load.remembered[DEFAULT_DEFAULT_PRESET_NAME] = getCurrentPreset(this, true);

          }

          this.load.remembered[presetName] = getCurrentPreset(this);
          this.preset = presetName;
          addPresetOption(this, presetName, true);

        },

        revert: function(gui) {

          common.each(this.__controllers, function(controller) {
            // Make revert work on Default.
            if (!this.getRoot().load.remembered) {
              controller.setValue(controller.initialValue);
            } else {
              recallSavedValue(gui || this.getRoot(), controller);
            }
          }, this);

          common.each(this.__folders, function(folder) {
            folder.revert(folder);
          });

          if (!gui) {
            markPresetModified(this.getRoot(), false);
          }


        },

        listen: function(controller) {

          var init = this.__listening.length == 0;
          this.__listening.push(controller);
          if (init) updateDisplays(this.__listening);

        }

      }

  );

  function add(gui, object, property, params) {

    if (object[property] === undefined) {
      throw new Error("Object " + object + " has no property \"" + property + "\"");
    }

    var controller;

    if (params.color) {

      controller = new ColorController(object, property);

    } else {

      var factoryArgs = [object,property].concat(params.factoryArgs);
      controller = controllerFactory.apply(gui, factoryArgs);

    }

    if (params.before instanceof Controller) {
      params.before = params.before.__li;
    }

    recallSavedValue(gui, controller);

    dom.addClass(controller.domElement, 'c');

    var name = document.createElement('span');
    dom.addClass(name, 'property-name');
    name.innerHTML = controller.property;

    var container = document.createElement('div');
    container.appendChild(name);
    container.appendChild(controller.domElement);

    var li = addRow(gui, container, params.before);

    dom.addClass(li, GUI.CLASS_CONTROLLER_ROW);
    dom.addClass(li, typeof controller.getValue());

    augmentController(gui, li, controller);

    gui.__controllers.push(controller);

    return controller;

  }

  /**
   * Add a row to the end of the GUI or before another row.
   *
   * @param gui
   * @param [dom] If specified, inserts the dom content in the new row
   * @param [liBefore] If specified, places the new row before another row
   */
  function addRow(gui, dom, liBefore) {
    var li = document.createElement('li');
    if (dom) li.appendChild(dom);
    if (liBefore) {
      gui.__ul.insertBefore(li, params.before);
    } else {
      gui.__ul.appendChild(li);
    }
    gui.onResize();
    return li;
  }

  function augmentController(gui, li, controller) {

    controller.__li = li;
    controller.__gui = gui;

    common.extend(controller, {

      options: function(options) {

        if (arguments.length > 1) {
          controller.remove();

          return add(
              gui,
              controller.object,
              controller.property,
              {
                before: controller.__li.nextElementSibling,
                factoryArgs: [common.toArray(arguments)]
              }
          );

        }

        if (common.isArray(options) || common.isObject(options)) {
          controller.remove();

          return add(
              gui,
              controller.object,
              controller.property,
              {
                before: controller.__li.nextElementSibling,
                factoryArgs: [options]
              }
          );

        }

      },

      name: function(v) {
        controller.__li.firstElementChild.firstElementChild.innerHTML = v;
        return controller;
      },

      listen: function() {
        controller.__gui.listen(controller);
        return controller;
      },

      remove: function() {
        controller.__gui.remove(controller);
        return controller;
      }

    });

    // All sliders should be accompanied by a box.
    if (controller instanceof NumberControllerSlider) {

      var box = new NumberControllerBox(controller.object, controller.property,
          { min: controller.__min, max: controller.__max, step: controller.__step });

      common.each(['updateDisplay', 'onChange', 'onFinishChange'], function(method) {
        var pc = controller[method];
        var pb = box[method];
        controller[method] = box[method] = function() {
          var args = Array.prototype.slice.call(arguments);
          pc.apply(controller, args);
          return pb.apply(box, args);
        }
      });

      dom.addClass(li, 'has-slider');
      controller.domElement.insertBefore(box.domElement, controller.domElement.firstElementChild);

    }
    else if (controller instanceof NumberControllerBox) {

      var r = function(returned) {

        // Have we defined both boundaries?
        if (common.isNumber(controller.__min) && common.isNumber(controller.__max)) {

          // Well, then lets just replace this with a slider.
          controller.remove();
          return add(
              gui,
              controller.object,
              controller.property,
              {
                before: controller.__li.nextElementSibling,
                factoryArgs: [controller.__min, controller.__max, controller.__step]
              });

        }

        return returned;

      };

      controller.min = common.compose(r, controller.min);
      controller.max = common.compose(r, controller.max);

    }
    else if (controller instanceof BooleanController) {

      dom.bind(li, 'click', function() {
        dom.fakeEvent(controller.__checkbox, 'click');
      });

      dom.bind(controller.__checkbox, 'click', function(e) {
        e.stopPropagation(); // Prevents double-toggle
      })

    }
    else if (controller instanceof FunctionController) {

      dom.bind(li, 'click', function() {
        dom.fakeEvent(controller.__button, 'click');
      });

      dom.bind(li, 'mouseover', function() {
        dom.addClass(controller.__button, 'hover');
      });

      dom.bind(li, 'mouseout', function() {
        dom.removeClass(controller.__button, 'hover');
      });

    }
    else if (controller instanceof ColorController) {

      dom.addClass(li, 'color');
      controller.updateDisplay = common.compose(function(r) {
        li.style.borderLeftColor = controller.__color.toString();
        return r;
      }, controller.updateDisplay);

      controller.updateDisplay();

    }

    controller.setValue = common.compose(function(r) {
      if (gui.getRoot().__preset_select && controller.isModified()) {
        markPresetModified(gui.getRoot(), true);
      }
      return r;
    }, controller.setValue);

  }

  function recallSavedValue(gui, controller) {

    // Find the topmost GUI, that's where remembered objects live.
    var root = gui.getRoot();

    // Does the object we're controlling match anything we've been told to
    // remember?
    var matched_index = root.__rememberedObjects.indexOf(controller.object);

    // Why yes, it does!
    if (matched_index != -1) {

      // Let me fetch a map of controllers for thcommon.isObject.
      var controller_map =
          root.__rememberedObjectIndecesToControllers[matched_index];

      // Ohp, I believe this is the first controller we've created for this
      // object. Lets make the map fresh.
      if (controller_map === undefined) {
        controller_map = {};
        root.__rememberedObjectIndecesToControllers[matched_index] =
            controller_map;
      }

      // Keep track of this controller
      controller_map[controller.property] = controller;

      // Okay, now have we saved any values for this controller?
      if (root.load && root.load.remembered) {

        var preset_map = root.load.remembered;

        // Which preset are we trying to load?
        var preset;

        if (preset_map[gui.preset]) {

          preset = preset_map[gui.preset];

        } else if (preset_map[DEFAULT_DEFAULT_PRESET_NAME]) {

          // Uhh, you can have the default instead?
          preset = preset_map[DEFAULT_DEFAULT_PRESET_NAME];

        } else {

          // Nada.

          return;

        }


        // Did the loaded object remember thcommon.isObject?
        if (preset[matched_index] &&

          // Did we remember this particular property?
            preset[matched_index][controller.property] !== undefined) {

          // We did remember something for this guy ...
          var value = preset[matched_index][controller.property];

          // And that's what it is.
          controller.initialValue = value;
          controller.setValue(value);

        }

      }

    }

  }

  function getLocalStorageHash(gui, key) {
    // TODO how does this deal with multiple GUI's?
    return document.location.href + '.' + key;

  }

  function addSaveMenu(gui) {

    var div = gui.__save_row = document.createElement('li');

    dom.addClass(gui.domElement, 'has-save');

    gui.__ul.insertBefore(div, gui.__ul.firstChild);

    dom.addClass(div, 'save-row');

    var gears = document.createElement('span');
    gears.innerHTML = '&nbsp;';
    dom.addClass(gears, 'button gears');

    // TODO replace with FunctionController
    var button = document.createElement('span');
    button.innerHTML = 'Save';
    dom.addClass(button, 'button');
    dom.addClass(button, 'save');

    var button2 = document.createElement('span');
    button2.innerHTML = 'New';
    dom.addClass(button2, 'button');
    dom.addClass(button2, 'save-as');

    var button3 = document.createElement('span');
    button3.innerHTML = 'Revert';
    dom.addClass(button3, 'button');
    dom.addClass(button3, 'revert');

    var select = gui.__preset_select = document.createElement('select');

    if (gui.load && gui.load.remembered) {

      common.each(gui.load.remembered, function(value, key) {
        addPresetOption(gui, key, key == gui.preset);
      });

    } else {
      addPresetOption(gui, DEFAULT_DEFAULT_PRESET_NAME, false);
    }

    dom.bind(select, 'change', function() {


      for (var index = 0; index < gui.__preset_select.length; index++) {
        gui.__preset_select[index].innerHTML = gui.__preset_select[index].value;
      }

      gui.preset = this.value;

    });

    div.appendChild(select);
    div.appendChild(gears);
    div.appendChild(button);
    div.appendChild(button2);
    div.appendChild(button3);

    if (SUPPORTS_LOCAL_STORAGE) {

      var saveLocally = document.getElementById('dg-save-locally');
      var explain = document.getElementById('dg-local-explain');

      saveLocally.style.display = 'block';

      var localStorageCheckBox = document.getElementById('dg-local-storage');

      if (localStorage.getItem(getLocalStorageHash(gui, 'isLocal')) === 'true') {
        localStorageCheckBox.setAttribute('checked', 'checked');
      }

      function showHideExplain() {
        explain.style.display = gui.useLocalStorage ? 'block' : 'none';
      }

      showHideExplain();

      // TODO: Use a boolean controller, fool!
      dom.bind(localStorageCheckBox, 'change', function() {
        gui.useLocalStorage = !gui.useLocalStorage;
        showHideExplain();
      });

    }

    var newConstructorTextArea = document.getElementById('dg-new-constructor');

    dom.bind(newConstructorTextArea, 'keydown', function(e) {
      if (e.metaKey && (e.which === 67 || e.keyCode == 67)) {
        SAVE_DIALOGUE.hide();
      }
    });

    dom.bind(gears, 'click', function() {
      newConstructorTextArea.innerHTML = JSON.stringify(gui.getSaveObject(), undefined, 2);
      SAVE_DIALOGUE.show();
      newConstructorTextArea.focus();
      newConstructorTextArea.select();
    });

    dom.bind(button, 'click', function() {
      gui.save();
    });

    dom.bind(button2, 'click', function() {
      var presetName = prompt('Enter a new preset name.');
      if (presetName) gui.saveAs(presetName);
    });

    dom.bind(button3, 'click', function() {
      gui.revert();
    });

//    div.appendChild(button2);

  }

  function addResizeHandle(gui) {

    gui.__resize_handle = document.createElement('div');

    common.extend(gui.__resize_handle.style, {

      width: '6px',
      marginLeft: '-3px',
      height: '200px',
      cursor: 'ew-resize',
      position: 'absolute'
//      border: '1px solid blue'

    });

    var pmouseX;

    dom.bind(gui.__resize_handle, 'mousedown', dragStart);
    dom.bind(gui.__closeButton, 'mousedown', dragStart);

    gui.domElement.insertBefore(gui.__resize_handle, gui.domElement.firstElementChild);

    function dragStart(e) {

      e.preventDefault();

      pmouseX = e.clientX;

      dom.addClass(gui.__closeButton, GUI.CLASS_DRAG);
      dom.bind(window, 'mousemove', drag);
      dom.bind(window, 'mouseup', dragStop);

      return false;

    }

    function drag(e) {

      e.preventDefault();

      gui.width += pmouseX - e.clientX;
      gui.onResize();
      pmouseX = e.clientX;

      return false;

    }

    function dragStop() {

      dom.removeClass(gui.__closeButton, GUI.CLASS_DRAG);
      dom.unbind(window, 'mousemove', drag);
      dom.unbind(window, 'mouseup', dragStop);

    }

  }

  function setWidth(gui, w) {
    gui.domElement.style.width = w + 'px';
    // Auto placed save-rows are position fixed, so we have to
    // set the width manually if we want it to bleed to the edge
    if (gui.__save_row && gui.autoPlace) {
      gui.__save_row.style.width = w + 'px';
    }if (gui.__closeButton) {
      gui.__closeButton.style.width = w + 'px';
    }
  }

  function getCurrentPreset(gui, useInitialValues) {

    var toReturn = {};

    // For each object I'm remembering
    common.each(gui.__rememberedObjects, function(val, index) {

      var saved_values = {};

      // The controllers I've made for thcommon.isObject by property
      var controller_map =
          gui.__rememberedObjectIndecesToControllers[index];

      // Remember each value for each property
      common.each(controller_map, function(controller, property) {
        saved_values[property] = useInitialValues ? controller.initialValue : controller.getValue();
      });

      // Save the values for thcommon.isObject
      toReturn[index] = saved_values;

    });

    return toReturn;

  }

  function addPresetOption(gui, name, setSelected) {
    var opt = document.createElement('option');
    opt.innerHTML = name;
    opt.value = name;
    gui.__preset_select.appendChild(opt);
    if (setSelected) {
      gui.__preset_select.selectedIndex = gui.__preset_select.length - 1;
    }
  }

  function setPresetSelectIndex(gui) {
    for (var index = 0; index < gui.__preset_select.length; index++) {
      if (gui.__preset_select[index].value == gui.preset) {
        gui.__preset_select.selectedIndex = index;
      }
    }
  }

  function markPresetModified(gui, modified) {
    var opt = gui.__preset_select[gui.__preset_select.selectedIndex];
//    console.log('mark', modified, opt);
    if (modified) {
      opt.innerHTML = opt.value + "*";
    } else {
      opt.innerHTML = opt.value;
    }
  }

  function updateDisplays(controllerArray) {


    if (controllerArray.length != 0) {

      requestAnimationFrame(function() {
        updateDisplays(controllerArray);
      });

    }

    common.each(controllerArray, function(c) {
      c.updateDisplay();
    });

  }

  return GUI;

})(dat.utils.css,
"<div id=\"dg-save\" class=\"dg dialogue\">\n\n  Here's the new load parameter for your <code>GUI</code>'s constructor:\n\n  <textarea id=\"dg-new-constructor\"></textarea>\n\n  <div id=\"dg-save-locally\">\n\n    <input id=\"dg-local-storage\" type=\"checkbox\"/> Automatically save\n    values to <code>localStorage</code> on exit.\n\n    <div id=\"dg-local-explain\">The values saved to <code>localStorage</code> will\n      override those passed to <code>dat.GUI</code>'s constructor. This makes it\n      easier to work incrementally, but <code>localStorage</code> is fragile,\n      and your friends may not see the same values you do.\n      \n    </div>\n    \n  </div>\n\n</div>",
".dg ul{list-style:none;margin:0;padding:0;width:100%;clear:both}.dg.ac{position:fixed;top:0;left:0;right:0;height:0;z-index:0}.dg:not(.ac) .main{overflow:hidden}.dg.main{-webkit-transition:opacity 0.1s linear;-o-transition:opacity 0.1s linear;-moz-transition:opacity 0.1s linear;transition:opacity 0.1s linear}.dg.main.taller-than-window{overflow-y:auto}.dg.main.taller-than-window .close-button{opacity:1;margin-top:-1px;border-top:1px solid #2c2c2c}.dg.main ul.closed .close-button{opacity:1 !important}.dg.main:hover .close-button,.dg.main .close-button.drag{opacity:1}.dg.main .close-button{-webkit-transition:opacity 0.1s linear;-o-transition:opacity 0.1s linear;-moz-transition:opacity 0.1s linear;transition:opacity 0.1s linear;border:0;position:absolute;line-height:19px;height:20px;cursor:pointer;text-align:center;background-color:#000}.dg.main .close-button:hover{background-color:#111}.dg.a{float:right;margin-right:15px;overflow-x:hidden}.dg.a.has-save ul{margin-top:27px}.dg.a.has-save ul.closed{margin-top:0}.dg.a .save-row{position:fixed;top:0;z-index:1002}.dg li{-webkit-transition:height 0.1s ease-out;-o-transition:height 0.1s ease-out;-moz-transition:height 0.1s ease-out;transition:height 0.1s ease-out}.dg li:not(.folder){cursor:auto;height:27px;line-height:27px;overflow:hidden;padding:0 4px 0 5px}.dg li.folder{padding:0;border-left:4px solid rgba(0,0,0,0)}.dg li.title{cursor:pointer;margin-left:-4px}.dg .closed li:not(.title),.dg .closed ul li,.dg .closed ul li > *{height:0;overflow:hidden;border:0}.dg .cr{clear:both;padding-left:3px;height:27px}.dg .property-name{cursor:default;float:left;clear:left;width:40%;overflow:hidden;text-overflow:ellipsis}.dg .c{float:left;width:60%}.dg .c input[type=text]{border:0;margin-top:4px;padding:3px;width:100%;float:right}.dg .has-slider input[type=text]{width:30%;margin-left:0}.dg .slider{float:left;width:66%;margin-left:-5px;margin-right:0;height:19px;margin-top:4px}.dg .slider-fg{height:100%}.dg .c input[type=checkbox]{margin-top:9px}.dg .c select{margin-top:5px}.dg .cr.function,.dg .cr.function .property-name,.dg .cr.function *,.dg .cr.boolean,.dg .cr.boolean *{cursor:pointer}.dg .selector{display:none;position:absolute;margin-left:-9px;margin-top:23px;z-index:10}.dg .c:hover .selector,.dg .selector.drag{display:block}.dg li.save-row{padding:0}.dg li.save-row .button{display:inline-block;padding:0px 6px}.dg.dialogue{background-color:#222;width:460px;padding:15px;font-size:13px;line-height:15px}#dg-new-constructor{padding:10px;color:#222;font-family:Monaco, monospace;font-size:10px;border:0;resize:none;box-shadow:inset 1px 1px 1px #888;word-wrap:break-word;margin:12px 0;display:block;width:440px;overflow-y:scroll;height:100px;position:relative}#dg-local-explain{display:none;font-size:11px;line-height:17px;border-radius:3px;background-color:#333;padding:8px;margin-top:10px}#dg-local-explain code{font-size:10px}#dat-gui-save-locally{display:none}.dg{color:#eee;font:11px 'Lucida Grande', sans-serif;text-shadow:0 -1px 0 #111}.dg.main::-webkit-scrollbar{width:5px;background:#1a1a1a}.dg.main::-webkit-scrollbar-corner{height:0;display:none}.dg.main::-webkit-scrollbar-thumb{border-radius:5px;background:#676767}.dg li:not(.folder){background:#1a1a1a;border-bottom:1px solid #2c2c2c}.dg li.save-row{line-height:25px;background:#dad5cb;border:0}.dg li.save-row select{margin-left:5px;width:108px}.dg li.save-row .button{margin-left:5px;margin-top:1px;border-radius:2px;font-size:9px;line-height:7px;padding:4px 4px 5px 4px;background:#c5bdad;color:#fff;text-shadow:0 1px 0 #b0a58f;box-shadow:0 -1px 0 #b0a58f;cursor:pointer}.dg li.save-row .button.gears{background:#c5bdad url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAANCAYAAAB/9ZQ7AAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAQJJREFUeNpiYKAU/P//PwGIC/ApCABiBSAW+I8AClAcgKxQ4T9hoMAEUrxx2QSGN6+egDX+/vWT4e7N82AMYoPAx/evwWoYoSYbACX2s7KxCxzcsezDh3evFoDEBYTEEqycggWAzA9AuUSQQgeYPa9fPv6/YWm/Acx5IPb7ty/fw+QZblw67vDs8R0YHyQhgObx+yAJkBqmG5dPPDh1aPOGR/eugW0G4vlIoTIfyFcA+QekhhHJhPdQxbiAIguMBTQZrPD7108M6roWYDFQiIAAv6Aow/1bFwXgis+f2LUAynwoIaNcz8XNx3Dl7MEJUDGQpx9gtQ8YCueB+D26OECAAQDadt7e46D42QAAAABJRU5ErkJggg==) 2px 1px no-repeat;height:7px;width:8px}.dg li.save-row .button:hover{background-color:#bab19e;box-shadow:0 -1px 0 #b0a58f}.dg li.folder{border-bottom:0}.dg li.title{padding-left:16px;background:#000 url(data:image/gif;base64,R0lGODlhBQAFAJEAAP////Pz8////////yH5BAEAAAIALAAAAAAFAAUAAAIIlI+hKgFxoCgAOw==) 6px 10px no-repeat;cursor:pointer;border-bottom:1px solid rgba(255,255,255,0.2)}.dg .closed li.title{background-image:url(data:image/gif;base64,R0lGODlhBQAFAJEAAP////Pz8////////yH5BAEAAAIALAAAAAAFAAUAAAIIlGIWqMCbWAEAOw==)}.dg .cr.boolean{border-left:3px solid #806787}.dg .cr.function{border-left:3px solid #e61d5f}.dg .cr.number{border-left:3px solid #2fa1d6}.dg .cr.number input[type=text]{color:#2fa1d6}.dg .cr.string{border-left:3px solid #1ed36f}.dg .cr.string input[type=text]{color:#1ed36f}.dg .cr.function:hover,.dg .cr.boolean:hover{background:#111}.dg .c input[type=text]{background:#303030;outline:none}.dg .c input[type=text]:hover{background:#3c3c3c}.dg .c input[type=text]:focus{background:#494949;color:#fff}.dg .c .slider{background:#303030;cursor:ew-resize}.dg .c .slider-fg{background:#2fa1d6}.dg .c .slider:hover{background:#3c3c3c}.dg .c .slider:hover .slider-fg{background:#44abda}\n",
dat.controllers.factory = (function (OptionController, NumberControllerBox, NumberControllerSlider, StringController, FunctionController, BooleanController, common) {

      return function(object, property) {

        var initialValue = object[property];

        // Providing options?
        if (common.isArray(arguments[2]) || common.isObject(arguments[2])) {
          return new OptionController(object, property, arguments[2]);
        }

        // Providing a map?

        if (common.isNumber(initialValue)) {

          if (common.isNumber(arguments[2]) && common.isNumber(arguments[3])) {

            // Has min and max.
            return new NumberControllerSlider(object, property, arguments[2], arguments[3]);

          } else {

            return new NumberControllerBox(object, property, { min: arguments[2], max: arguments[3] });

          }

        }

        if (common.isString(initialValue)) {
          return new StringController(object, property);
        }

        if (common.isFunction(initialValue)) {
          return new FunctionController(object, property, '');
        }

        if (common.isBoolean(initialValue)) {
          return new BooleanController(object, property);
        }

      }

    })(dat.controllers.OptionController,
dat.controllers.NumberControllerBox,
dat.controllers.NumberControllerSlider,
dat.controllers.StringController = (function (Controller, dom, common) {

  /**
   * @class Provides a text input to alter the string property of an object.
   *
   * @extends dat.controllers.Controller
   *
   * @param {Object} object The object to be manipulated
   * @param {string} property The name of the property to be manipulated
   *
   * @member dat.controllers
   */
  var StringController = function(object, property) {

    StringController.superclass.call(this, object, property);

    var _this = this;

    this.__input = document.createElement('input');
    this.__input.setAttribute('type', 'text');

    dom.bind(this.__input, 'keyup', onChange);
    dom.bind(this.__input, 'change', onChange);
    dom.bind(this.__input, 'blur', onBlur);
    dom.bind(this.__input, 'keydown', function(e) {
      if (e.keyCode === 13) {
        this.blur();
      }
    });
    

    function onChange() {
      _this.setValue(_this.__input.value);
    }

    function onBlur() {
      if (_this.__onFinishChange) {
        _this.__onFinishChange.call(_this, _this.getValue());
      }
    }

    this.updateDisplay();

    this.domElement.appendChild(this.__input);

  };

  StringController.superclass = Controller;

  common.extend(

      StringController.prototype,
      Controller.prototype,

      {

        updateDisplay: function() {
          // Stops the caret from moving on account of:
          // keyup -> setValue -> updateDisplay
          if (!dom.isActive(this.__input)) {
            this.__input.value = this.getValue();
          }
          return StringController.superclass.prototype.updateDisplay.call(this);
        }

      }

  );

  return StringController;

})(dat.controllers.Controller,
dat.dom.dom,
dat.utils.common),
dat.controllers.FunctionController,
dat.controllers.BooleanController,
dat.utils.common),
dat.controllers.Controller,
dat.controllers.BooleanController,
dat.controllers.FunctionController,
dat.controllers.NumberControllerBox,
dat.controllers.NumberControllerSlider,
dat.controllers.OptionController,
dat.controllers.ColorController = (function (Controller, dom, Color, interpret, common) {

  var ColorController = function(object, property) {

    ColorController.superclass.call(this, object, property);

    this.__color = new Color(this.getValue());
    this.__temp = new Color(0);

    var _this = this;

    this.domElement = document.createElement('div');

    dom.makeSelectable(this.domElement, false);

    this.__selector = document.createElement('div');
    this.__selector.className = 'selector';

    this.__saturation_field = document.createElement('div');
    this.__saturation_field.className = 'saturation-field';

    this.__field_knob = document.createElement('div');
    this.__field_knob.className = 'field-knob';
    this.__field_knob_border = '2px solid ';

    this.__hue_knob = document.createElement('div');
    this.__hue_knob.className = 'hue-knob';

    this.__hue_field = document.createElement('div');
    this.__hue_field.className = 'hue-field';

    this.__input = document.createElement('input');
    this.__input.type = 'text';
    this.__input_textShadow = '0 1px 1px ';

    dom.bind(this.__input, 'keydown', function(e) {
      if (e.keyCode === 13) { // on enter
        onBlur.call(this);
      }
    });

    dom.bind(this.__input, 'blur', onBlur);

    dom.bind(this.__selector, 'mousedown', function(e) {

      dom
        .addClass(this, 'drag')
        .bind(window, 'mouseup', function(e) {
          dom.removeClass(_this.__selector, 'drag');
        });

    });

    var value_field = document.createElement('div');

    common.extend(this.__selector.style, {
      width: '122px',
      height: '102px',
      padding: '3px',
      backgroundColor: '#222',
      boxShadow: '0px 1px 3px rgba(0,0,0,0.3)'
    });

    common.extend(this.__field_knob.style, {
      position: 'absolute',
      width: '12px',
      height: '12px',
      border: this.__field_knob_border + (this.__color.v < .5 ? '#fff' : '#000'),
      boxShadow: '0px 1px 3px rgba(0,0,0,0.5)',
      borderRadius: '12px',
      zIndex: 1
    });
    
    common.extend(this.__hue_knob.style, {
      position: 'absolute',
      width: '15px',
      height: '2px',
      borderRight: '4px solid #fff',
      zIndex: 1
    });

    common.extend(this.__saturation_field.style, {
      width: '100px',
      height: '100px',
      border: '1px solid #555',
      marginRight: '3px',
      display: 'inline-block',
      cursor: 'pointer'
    });

    common.extend(value_field.style, {
      width: '100%',
      height: '100%',
      background: 'none'
    });
    
    linearGradient(value_field, 'top', 'rgba(0,0,0,0)', '#000');

    common.extend(this.__hue_field.style, {
      width: '15px',
      height: '100px',
      display: 'inline-block',
      border: '1px solid #555',
      cursor: 'ns-resize'
    });

    hueGradient(this.__hue_field);

    common.extend(this.__input.style, {
      outline: 'none',
//      width: '120px',
      textAlign: 'center',
//      padding: '4px',
//      marginBottom: '6px',
      color: '#fff',
      border: 0,
      fontWeight: 'bold',
      textShadow: this.__input_textShadow + 'rgba(0,0,0,0.7)'
    });

    dom.bind(this.__saturation_field, 'mousedown', fieldDown);
    dom.bind(this.__field_knob, 'mousedown', fieldDown);

    dom.bind(this.__hue_field, 'mousedown', function(e) {
      setH(e);
      dom.bind(window, 'mousemove', setH);
      dom.bind(window, 'mouseup', unbindH);
    });

    function fieldDown(e) {
      setSV(e);
      // document.body.style.cursor = 'none';
      dom.bind(window, 'mousemove', setSV);
      dom.bind(window, 'mouseup', unbindSV);
    }

    function unbindSV() {
      dom.unbind(window, 'mousemove', setSV);
      dom.unbind(window, 'mouseup', unbindSV);
      // document.body.style.cursor = 'default';
    }

    function onBlur() {
      var i = interpret(this.value);
      if (i !== false) {
        _this.__color.__state = i;
        _this.setValue(_this.__color.toOriginal());
      } else {
        this.value = _this.__color.toString();
      }
    }

    function unbindH() {
      dom.unbind(window, 'mousemove', setH);
      dom.unbind(window, 'mouseup', unbindH);
    }

    this.__saturation_field.appendChild(value_field);
    this.__selector.appendChild(this.__field_knob);
    this.__selector.appendChild(this.__saturation_field);
    this.__selector.appendChild(this.__hue_field);
    this.__hue_field.appendChild(this.__hue_knob);

    this.domElement.appendChild(this.__input);
    this.domElement.appendChild(this.__selector);

    this.updateDisplay();

    function setSV(e) {

      e.preventDefault();

      var w = dom.getWidth(_this.__saturation_field);
      var o = dom.getOffset(_this.__saturation_field);
      var s = (e.clientX - o.left + document.body.scrollLeft) / w;
      var v = 1 - (e.clientY - o.top + document.body.scrollTop) / w;

      if (v > 1) v = 1;
      else if (v < 0) v = 0;

      if (s > 1) s = 1;
      else if (s < 0) s = 0;

      _this.__color.v = v;
      _this.__color.s = s;

      _this.setValue(_this.__color.toOriginal());


      return false;

    }

    function setH(e) {

      e.preventDefault();

      var s = dom.getHeight(_this.__hue_field);
      var o = dom.getOffset(_this.__hue_field);
      var h = 1 - (e.clientY - o.top + document.body.scrollTop) / s;

      if (h > 1) h = 1;
      else if (h < 0) h = 0;

      _this.__color.h = h * 360;

      _this.setValue(_this.__color.toOriginal());

      return false;

    }

  };

  ColorController.superclass = Controller;

  common.extend(

      ColorController.prototype,
      Controller.prototype,

      {

        updateDisplay: function() {

          var i = interpret(this.getValue());

          if (i !== false) {

            var mismatch = false;

            // Check for mismatch on the interpreted value.

            common.each(Color.COMPONENTS, function(component) {
              if (!common.isUndefined(i[component]) &&
                  !common.isUndefined(this.__color.__state[component]) &&
                  i[component] !== this.__color.__state[component]) {
                mismatch = true;
                return {}; // break
              }
            }, this);

            // If nothing diverges, we keep our previous values
            // for statefulness, otherwise we recalculate fresh
            if (mismatch) {
              common.extend(this.__color.__state, i);
            }

          }

          common.extend(this.__temp.__state, this.__color.__state);

          this.__temp.a = 1;

          var flip = (this.__color.v < .5 || this.__color.s > .5) ? 255 : 0;
          var _flip = 255 - flip;

          common.extend(this.__field_knob.style, {
            marginLeft: 100 * this.__color.s - 7 + 'px',
            marginTop: 100 * (1 - this.__color.v) - 7 + 'px',
            backgroundColor: this.__temp.toString(),
            border: this.__field_knob_border + 'rgb(' + flip + ',' + flip + ',' + flip +')'
          });

          this.__hue_knob.style.marginTop = (1 - this.__color.h / 360) * 100 + 'px'

          this.__temp.s = 1;
          this.__temp.v = 1;

          linearGradient(this.__saturation_field, 'left', '#fff', this.__temp.toString());

          common.extend(this.__input.style, {
            backgroundColor: this.__input.value = this.__color.toString(),
            color: 'rgb(' + flip + ',' + flip + ',' + flip +')',
            textShadow: this.__input_textShadow + 'rgba(' + _flip + ',' + _flip + ',' + _flip +',.7)'
          });

        }

      }

  );
  
  var vendors = ['-moz-','-o-','-webkit-','-ms-',''];
  
  function linearGradient(elem, x, a, b) {
    elem.style.background = '';
    common.each(vendors, function(vendor) {
      elem.style.cssText += 'background: ' + vendor + 'linear-gradient('+x+', '+a+' 0%, ' + b + ' 100%); ';
    });
  }
  
  function hueGradient(elem) {
    elem.style.background = '';
    elem.style.cssText += 'background: -moz-linear-gradient(top,  #ff0000 0%, #ff00ff 17%, #0000ff 34%, #00ffff 50%, #00ff00 67%, #ffff00 84%, #ff0000 100%);'
    elem.style.cssText += 'background: -webkit-linear-gradient(top,  #ff0000 0%,#ff00ff 17%,#0000ff 34%,#00ffff 50%,#00ff00 67%,#ffff00 84%,#ff0000 100%);'
    elem.style.cssText += 'background: -o-linear-gradient(top,  #ff0000 0%,#ff00ff 17%,#0000ff 34%,#00ffff 50%,#00ff00 67%,#ffff00 84%,#ff0000 100%);'
    elem.style.cssText += 'background: -ms-linear-gradient(top,  #ff0000 0%,#ff00ff 17%,#0000ff 34%,#00ffff 50%,#00ff00 67%,#ffff00 84%,#ff0000 100%);'
    elem.style.cssText += 'background: linear-gradient(top,  #ff0000 0%,#ff00ff 17%,#0000ff 34%,#00ffff 50%,#00ff00 67%,#ffff00 84%,#ff0000 100%);'
  }


  return ColorController;

})(dat.controllers.Controller,
dat.dom.dom,
dat.color.Color = (function (interpret, math, toString, common) {

  var Color = function() {

    this.__state = interpret.apply(this, arguments);

    if (this.__state === false) {
      throw 'Failed to interpret color arguments';
    }

    this.__state.a = this.__state.a || 1;


  };

  Color.COMPONENTS = ['r','g','b','h','s','v','hex','a'];

  common.extend(Color.prototype, {

    toString: function() {
      return toString(this);
    },

    toOriginal: function() {
      return this.__state.conversion.write(this);
    }

  });

  defineRGBComponent(Color.prototype, 'r', 2);
  defineRGBComponent(Color.prototype, 'g', 1);
  defineRGBComponent(Color.prototype, 'b', 0);

  defineHSVComponent(Color.prototype, 'h');
  defineHSVComponent(Color.prototype, 's');
  defineHSVComponent(Color.prototype, 'v');

  Object.defineProperty(Color.prototype, 'a', {

    get: function() {
      return this.__state.a;
    },

    set: function(v) {
      this.__state.a = v;
    }

  });

  Object.defineProperty(Color.prototype, 'hex', {

    get: function() {

      if (!this.__state.space !== 'HEX') {
        this.__state.hex = math.rgb_to_hex(this.r, this.g, this.b);
      }

      return this.__state.hex;

    },

    set: function(v) {

      this.__state.space = 'HEX';
      this.__state.hex = v;

    }

  });

  function defineRGBComponent(target, component, componentHexIndex) {

    Object.defineProperty(target, component, {

      get: function() {

        if (this.__state.space === 'RGB') {
          return this.__state[component];
        }

        recalculateRGB(this, component, componentHexIndex);

        return this.__state[component];

      },

      set: function(v) {

        if (this.__state.space !== 'RGB') {
          recalculateRGB(this, component, componentHexIndex);
          this.__state.space = 'RGB';
        }

        this.__state[component] = v;

      }

    });

  }

  function defineHSVComponent(target, component) {

    Object.defineProperty(target, component, {

      get: function() {

        if (this.__state.space === 'HSV')
          return this.__state[component];

        recalculateHSV(this);

        return this.__state[component];

      },

      set: function(v) {

        if (this.__state.space !== 'HSV') {
          recalculateHSV(this);
          this.__state.space = 'HSV';
        }

        this.__state[component] = v;

      }

    });

  }

  function recalculateRGB(color, component, componentHexIndex) {

    if (color.__state.space === 'HEX') {

      color.__state[component] = math.component_from_hex(color.__state.hex, componentHexIndex);

    } else if (color.__state.space === 'HSV') {

      common.extend(color.__state, math.hsv_to_rgb(color.__state.h, color.__state.s, color.__state.v));

    } else {

      throw 'Corrupted color state';

    }

  }

  function recalculateHSV(color) {

    var result = math.rgb_to_hsv(color.r, color.g, color.b);

    common.extend(color.__state,
        {
          s: result.s,
          v: result.v
        }
    );

    if (!common.isNaN(result.h)) {
      color.__state.h = result.h;
    } else if (common.isUndefined(color.__state.h)) {
      color.__state.h = 0;
    }

  }

  return Color;

})(dat.color.interpret,
dat.color.math = (function () {

  var tmpComponent;

  return {

    hsv_to_rgb: function(h, s, v) {

      var hi = Math.floor(h / 60) % 6;

      var f = h / 60 - Math.floor(h / 60);
      var p = v * (1.0 - s);
      var q = v * (1.0 - (f * s));
      var t = v * (1.0 - ((1.0 - f) * s));
      var c = [
        [v, t, p],
        [q, v, p],
        [p, v, t],
        [p, q, v],
        [t, p, v],
        [v, p, q]
      ][hi];

      return {
        r: c[0] * 255,
        g: c[1] * 255,
        b: c[2] * 255
      };

    },

    rgb_to_hsv: function(r, g, b) {

      var min = Math.min(r, g, b),
          max = Math.max(r, g, b),
          delta = max - min,
          h, s;

      if (max != 0) {
        s = delta / max;
      } else {
        return {
          h: NaN,
          s: 0,
          v: 0
        };
      }

      if (r == max) {
        h = (g - b) / delta;
      } else if (g == max) {
        h = 2 + (b - r) / delta;
      } else {
        h = 4 + (r - g) / delta;
      }
      h /= 6;
      if (h < 0) {
        h += 1;
      }

      return {
        h: h * 360,
        s: s,
        v: max / 255
      };
    },

    rgb_to_hex: function(r, g, b) {
      var hex = this.hex_with_component(0, 2, r);
      hex = this.hex_with_component(hex, 1, g);
      hex = this.hex_with_component(hex, 0, b);
      return hex;
    },

    component_from_hex: function(hex, componentIndex) {
      return (hex >> (componentIndex * 8)) & 0xFF;
    },

    hex_with_component: function(hex, componentIndex, value) {
      return value << (tmpComponent = componentIndex * 8) | (hex & ~ (0xFF << tmpComponent));
    }

  }

})(),
dat.color.toString,
dat.utils.common),
dat.color.interpret,
dat.utils.common),
dat.utils.requestAnimationFrame = (function () {

  /**
   * requirejs version of Paul Irish's RequestAnimationFrame
   * http://paulirish.com/2011/requestanimationframe-for-smart-animating/
   */

  return window.webkitRequestAnimationFrame ||
      window.mozRequestAnimationFrame ||
      window.oRequestAnimationFrame ||
      window.msRequestAnimationFrame ||
      function(callback, element) {

        window.setTimeout(callback, 1000 / 60);

      };
})(),
dat.dom.CenteredDiv = (function (dom, common) {


  var CenteredDiv = function() {

    this.backgroundElement = document.createElement('div');
    common.extend(this.backgroundElement.style, {
      backgroundColor: 'rgba(0,0,0,0.8)',
      top: 0,
      left: 0,
      display: 'none',
      zIndex: '1000',
      opacity: 0,
      WebkitTransition: 'opacity 0.2s linear'
    });

    dom.makeFullscreen(this.backgroundElement);
    this.backgroundElement.style.position = 'fixed';

    this.domElement = document.createElement('div');
    common.extend(this.domElement.style, {
      position: 'fixed',
      display: 'none',
      zIndex: '1001',
      opacity: 0,
      WebkitTransition: '-webkit-transform 0.2s ease-out, opacity 0.2s linear'
    });


    document.body.appendChild(this.backgroundElement);
    document.body.appendChild(this.domElement);

    var _this = this;
    dom.bind(this.backgroundElement, 'click', function() {
      _this.hide();
    });


  };

  CenteredDiv.prototype.show = function() {

    var _this = this;
    


    this.backgroundElement.style.display = 'block';

    this.domElement.style.display = 'block';
    this.domElement.style.opacity = 0;
//    this.domElement.style.top = '52%';
    this.domElement.style.webkitTransform = 'scale(1.1)';

    this.layout();

    common.defer(function() {
      _this.backgroundElement.style.opacity = 1;
      _this.domElement.style.opacity = 1;
      _this.domElement.style.webkitTransform = 'scale(1)';
    });

  };

  CenteredDiv.prototype.hide = function() {

    var _this = this;

    var hide = function() {

      _this.domElement.style.display = 'none';
      _this.backgroundElement.style.display = 'none';

      dom.unbind(_this.domElement, 'webkitTransitionEnd', hide);
      dom.unbind(_this.domElement, 'transitionend', hide);
      dom.unbind(_this.domElement, 'oTransitionEnd', hide);

    };

    dom.bind(this.domElement, 'webkitTransitionEnd', hide);
    dom.bind(this.domElement, 'transitionend', hide);
    dom.bind(this.domElement, 'oTransitionEnd', hide);

    this.backgroundElement.style.opacity = 0;
//    this.domElement.style.top = '48%';
    this.domElement.style.opacity = 0;
    this.domElement.style.webkitTransform = 'scale(1.1)';

  };

  CenteredDiv.prototype.layout = function() {
    this.domElement.style.left = window.innerWidth/2 - dom.getWidth(this.domElement) / 2 + 'px';
    this.domElement.style.top = window.innerHeight/2 - dom.getHeight(this.domElement) / 2 + 'px';
  };
  
  function lockScroll(e) {
    console.log(e);
  }

  return CenteredDiv;

})(dat.dom.dom,
dat.utils.common),
dat.dom.dom,
dat.utils.common);

google.html

<!doctype html><html><head><base href="http://www.google.com"><meta http-equiv="content-type" content="text/html; charset=UTF-8"><meta name="description" content="Search the world&#39;s information, including webpages, images, videos and more. Google has many special features to help you find exactly what you&#39;re looking for."><meta name="robots" content="noodp"><title>Google</title><script>window.google={kEI:"RzP1TsPtDaPA0QXo0sCnAQ",getEI:function(a){var b;while(a&&!(a.getAttribute&&(b=a.getAttribute("eid"))))a=a.parentNode;return b||google.kEI},https:function(){return window.location.protocol=="https:"},kEXPI:"17259,17311,24472,27147,30869,31396,33491,33523,33524,35213,35300,35387",kCSI:{e:"17259,17311,24472,27147,30869,31396,33491,33523,33524,35213,35300,35387",ei:"RzP1TsPtDaPA0QXo0sCnAQ"},authuser:0,
ml:function(){},pageState:"#",kHL:"en",time:function(){return(new Date).getTime()},log:function(a,b,c,e){var d=new Image,g=google,h=g.lc,f=g.li,j="";d.onerror=(d.onload=(d.onabort=function(){delete h[f]}));h[f]=d;if(!c&&b.search("&ei=")==-1)j="&ei="+google.getEI(e);var i=c||"/gen_204?atyp=i&ct="+a+"&cad="+b+j+"&zx="+google.time(),k=/^http:/i;if(k.test(i)&&google.https()){google.ml(new Error("GLMM"),false,{src:i});
delete h[f];return}d.src=i;g.li=f+1},lc:[],li:0,j:{en:1,l:function(){google.fl=true},e:function(){google.fl=true},b:location.hash&&location.hash!="#",bv:21,cf:"osb",pm:"p",pl:[],mc:0,sc:0.5,u:"c9c918f0"},Toolbelt:{},y:{},x:function(a,b){google.y[a.id]=
[a,b];return false}};(function(){var a=google.j;window.onpopstate=
function(){a.psc=1};for(var b=0,c;c=["ad","bc","inpr","is","p","pa","ac","pc","pah","ph","sa","sifp","slp","spf","spn","xx","zc","zz"][b++];)(function(e){a[e]=function(){a.pl.push([e,arguments])}})(c)})();if(!window.chrome)window.chrome={};window.chrome.sv=1.00;
window.google.sn="webhp";window.google.timers={};window.google.startTick=function(a,b){window.google.timers[a]={t:{start:(new Date).getTime()},bfr:!(!b)}};window.google.tick=function(a,b,c){if(!window.google.timers[a])google.startTick(a);window.google.timers[a].t[b]=c||(new Date).getTime()};google.startTick("load",true);try{window.google.pt=window.chrome&&window.chrome.csi&&Math.floor(window.chrome.csi().pageT);}catch(u){}
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.gbm{-moz-box-shadow:1px 1px 1px rgba(0,0,0,.2)}.gbto .gbm,.gbto #gbs{top:50px;visibility:visible}#gbz .gbm,#gbz #gbs{left:0}#gbg .gbm,#gbg #gbs{right:0}.gbxms{background-color:#ccc;display:block;position:absolute;z-index:1;top:-1px;left:-2px;right:-2px;bottom:-2px;opacity:.4;-moz-border-radius:3px;filter:progid:DXImageTransform.Microsoft.Blur(pixelradius=5);*opacity:1;*top:-2px;*left:-5px;*right:5px;*bottom:4px;-ms-filter:"progid:DXImageTransform.Microsoft.Blur(pixelradius=5)";opacity:1\0/;top:-4px\0/;left:-6px\0/;right:5px\0/;bottom:4px\0/}.gbma{position:relative;top:-1px;border-style:solid dashed dashed;border-color:transparent;border-top-color:#c0c0c0;display:-moz-inline-box;display:inline-block;font-size:0;height:0;line-height:0;width:0;border-width:3px 3px 0;padding-top:1px;left:4px}#gbztms1,#gbi4m1,#gbi4s,#gbi4t{zoom:1}.gbtc,.gbmc,.gbmcc{display:block;list-style:none;margin:0;padding:0}.gbmc{background:#fff;padding:10px 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#gbi4id{top:3px}.gbi4p{display:block;width:24px}#gbi4id,#gbmpid{background:url(//ssl.gstatic.com/gb/images/b_8d5afc09.png);_background:url(//ssl.gstatic.com/gb/images/b8_3615d64d.png)}#gbi4id{background-position:-29px -54px}#gbmpid{background-position:-58px 0px}#gbmpi,#gbmpid{border:none;display:inline-block;margin:10px 20px;height:48px;width:48px}#gbmpi,#gbmpid{*display:inline}#gbg5{font-size:0}#gbgs5{padding:5px !important}.gbto #gbgs5{padding:7px 5px 6px !important}#gbi5{background:url(//ssl.gstatic.com/gb/images/b_8d5afc09.png);_background:url(//ssl.gstatic.com/gb/images/b8_3615d64d.png);background-position:0 0;display:block;font-size:0;height:17px;width:16px}.gbto #gbi5{background-position:-6px -22px}#gbgf .gbmt,.gbn .gbmt,.gbn .gbmt:visited,.gbnd .gbmt,.gbnd .gbmt:visited{color:#dd8e27 !important}.gbf .gbmt,.gbf .gbmt:visited{color:#900 !important}.gbmt,.gbml1,.gbmt:visited,.gbml1:visited{color:#36c !important;text-decoration:none 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onclick=gbar.qs(this);gbar.logger.il(1,{t:10}); id=gb_10 href="http://books.google.com/bkshp?hl=en&tab=wp" class=gbmt><span style="background-position:-259px -267px" class=gbtb2></span><span class=gbts>Books</span></a></span><span class=gbmtc><a onclick=gbar.logger.il(1,{t:166}); id=gb_166 href="http://music.google.com/" class=gbmt><span style="background-position:0 -244px" class=gbtb2></span><span class=gbts>Music</span></a></span><span class=gbmtc><a onclick=gbar.logger.il(1,{t:172}); id=gb_172 href="https://www.google.com/offers" class=gbmt><span style="background-position:-222px -267px" class=gbtb2></span><span class=gbts>Offers</span></a></span><span class=gbmtc><a onclick=gbar.logger.il(1,{t:212}); id=gb_212 href="https://wallet.google.com/manage/" class=gbmt><span style="background-position:-30px -37px" class=gbtb2></span><span class=gbts>Wallet</span></a></span><span class=gbmtc><a onclick=gbar.qs(this);gbar.logger.il(1,{t:6}); id=gb_6 href="http://www.google.com/prdhp?hl=en&tab=wf" class=gbmt><span style="background-position:-229px -124px" class=gbtb2></span><span class=gbts>Shopping</span></a></span><span class=gbmtc><a onclick=gbar.logger.il(1,{t:30}); id=gb_30 href="http://www.blogger.com/?tab=wj" class=gbmt><span style="background-position:0 -207px" class=gbtb2></span><span class=gbts>Blogger</span></a></span><span class=gbmtc><a onclick=gbar.logger.il(1,{t:32}); id=gb_32 href="http://www.google.com/reader/?hl=en&tab=wy" class=gbmt><span style="background-position:-143px -74px" class=gbtb2></span><span class=gbts>Reader</span></a></span><span class=gbmtc><a onclick=gbar.qs(this);gbar.logger.il(1,{t:27}); id=gb_27 href="http://www.google.com/finance?tab=we" class=gbmt><span style="background-position:-74px -207px" class=gbtb2></span><span class=gbts>Finance</span></a></span><span class=gbmtc><a onclick=gbar.qs(this);gbar.logger.il(1,{t:31}); id=gb_31 href="http://picasaweb.google.com/home?hl=en&tab=wq" 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    // Add to world
    this.body = world.CreateBody(bodyDef);
    this.body.CreateFixture(fixDef);
  }
  Element.prototype.update = function () {};
  Element.prototype.draw = function () {
    var pos = this.body.GetPosition();
    var ang = this.body.GetAngle() * 180 / Math.PI;
    var origPos = this.origPos;

    this.$el.css('transform', 'translate3d(' + ~~(pos.x*SCALE - origPos.left  - origPos.width / 2) + 'px, ' + ~~(pos.y*SCALE - origPos.top - origPos.height / 2) + 'px, 0) rotate3d(0,0,1,' + ~~ang + 'deg)');
  };
  Real.Element = Element;

  function Joint(real, elA, elB) {
    elementA = real.findElement(elA);
    elementB = real.findElement(elB);

    if (!elementA || !elementB) {
      return;
    }

    var springDef;
    springDef = new b2DistanceJointDef();
    springDef.bodyA = elementA.body;
    springDef.bodyB = elementB.body;
    springDef.localAnchorA = springDef.bodyA.GetLocalCenter();
    springDef.localAnchorB = springDef.bodyB.GetLocalCenter();
    springDef.collideConnected = true;
    //springDef.dampingRatio = .2;
    //springDef.frequencyHz = .5
    springDef.length = (function () {
      var v = springDef.bodyB.GetWorldPoint(springDef.localAnchorB);
      v.Subtract(springDef.bodyA.GetWorldPoint(springDef.localAnchorA))
      return v.Length();
    }())

    real.world.CreateJoint(springDef)
  }
  Real.Joint = Joint;

  //
  // Ground
  //

  BallElement = (function(uber) {

    inherit(BallElement, uber);

    function BallElement() {
      BallElement.uber.constructor.apply(this, arguments);
    }
    BallElement.prototype.draw = function () {
      BallElement.uber.draw.call(this);

      function angleVV(v1, v2) {
        var n1 = v1.Length();
        var n2 = v2.Length();

        return Math.atan2(v1.y/n1, v1.x/n1) - Math.atan2(v2.y/n2, v2.x/n2);
      }
      var vel = this.body.GetLinearVelocityFromLocalPoint(new b2Vec2(0,0));
      this.$el.find('b')
        .parent().css('transform', 'rotate3d(0,0,1,' + ~~((-this.body.GetAngle() + angleVV(vel, new b2Vec2(0, 1)) - Math.PI / 2) * 180 / Math.PI) + 'deg)')
          .end()
        .css({
          width: vel.Length() * 10 + '%',
          opacity: vel.Length() / 10
        });
    };

    return BallElement;

  })(Element);

  var real = new Real();
  window.real = real;

  $('#hplogo, #gbqfq, #gbqfba, #gbqfbb').each(function (i, el) {
    real.addElement(new Real.Element(this, real.world));
  });


  //
  // MouseJoint
  //

  var mouse = new b2Vec2();
  $(window).mousemove(function (e) {
    mouse.Set(e.pageX / SCALE, e.pageY / SCALE);
  });
  window.mouse = mouse;

  (function (mouse) {
    var mouseJointDef = new b2MouseJointDef();
    mouseJointDef.target = mouse;
    mouseJointDef.bodyA = real.world.GetGroundBody();
    mouseJointDef.collideConnected = true;

    var mouseJoint;
    $('*').on({
      mousedown: function (e) {
        var element = real.findElement(this);
        var body = element && element.body;

        if (!body) {
          return;
        }

        mouseJointDef.bodyB = body;
        mouseJointDef.maxForce = 300 * body.GetMass();

        mouseJoint = real.world.CreateJoint(mouseJointDef);
        mouseJoint.SetTarget(mouse);

        function mouseup(e) {
          real.world.DestroyJoint(mouseJoint);
        }

        $(window).one('mouseup', mouseup);
      }
    });
  }(mouse));

  real.start();
  </script>

hammer.js

/*
 * Hammer.JS
 * version 0.6.1
 * author: Eight Media
 * https://github.com/EightMedia/hammer.js
 */
function Hammer(element, options, undefined)
{
    var self = this;

    var defaults = {
        // prevent the default event or not... might be buggy when false
        prevent_default    : false,
        css_hacks          : true,
        cancel_event       : true,

        swipe              : true,
        swipe_time         : 200,   // ms
        swipe_min_distance : 20, // pixels

        drag               : true,
        drag_vertical      : true,
        drag_horizontal    : true,
        // minimum distance before the drag event starts
        drag_min_distance  : 20, // pixels

        // pinch zoom and rotation
        transform          : true,
        scale_treshold     : 0.1,
        rotation_treshold  : 15, // degrees

        tap                : true,
        tap_double         : true,
        tap_max_interval   : 300,
        tap_max_distance   : 10,
        tap_double_distance: 20,

        hold               : true,
        hold_timeout       : 500
    };
    options = mergeObject(defaults, options);

    // some css hacks
    (function() {
        if(!options.css_hacks) {
            return false;
        }

        var vendors = ['webkit','moz','ms','o',''];
        var css_props = {
            "userSelect": "none",
            "touchCallout": "none",
            "userDrag": "none",
            "tapHighlightColor": "rgba(0,0,0,0)"
        };

        var prop = '';
        for(var i = 0; i < vendors.length; i++) {
            for(var p in css_props) {
                prop = p;
                if(vendors[i]) {
                    prop = vendors[i] + prop.substring(0, 1).toUpperCase() + prop.substring(1);
                }
                element.style[ prop ] = css_props[p];
            }
        }
    })();

    // holds the distance that has been moved
    var _distance = 0;

    // holds the exact angle that has been moved
    var _angle = 0;

    // holds the diraction that has been moved
    var _direction = 0;

    // holds position movement for sliding
    var _pos = { };

    // how many fingers are on the screen
    var _fingers = 0;

    var _first = false;

    var _gesture = null;
    var _prev_gesture = null;

    var _touch_start_time = null;
    var _prev_tap_pos = {x: 0, y: 0};
    var _prev_tap_end_time = null;

    var _hold_timer = null;

    var _offset = {};

    // keep track of the mouse status
    var _mousedown = false;

    var _event_start;
    var _event_move;
    var _event_end;

    var _has_touch = ('ontouchstart' in window);


    /**
     * option setter/getter
     * @param   string  key
     * @param   mixed   value
     * @return  mixed   value
     */
    this.option = function(key, val) {
        if(val != undefined) {
            options[key] = val;
        }

        return options[key];
    };


    /**
     * angle to direction define
     * @param  float    angle
     * @return string   direction
     */
    this.getDirectionFromAngle = function( angle )
    {
        var directions = {
            down: angle >= 45 && angle < 135, //90
            left: angle >= 135 || angle <= -135, //180
            up: angle < -45 && angle > -135, //270
            right: angle >= -45 && angle <= 45 //0
        };

        var direction, key;
        for(key in directions){
            if(directions[key]){
                direction = key;
                break;
            }
        }
        return direction;
    };


    /**
     * count the number of fingers in the event
     * when no fingers are detected, one finger is returned (mouse pointer)
     * @param  event
     * @return int  fingers
     */
    function countFingers( event )
    {
        // there is a bug on android (until v4?) that touches is always 1,
        // so no multitouch is supported, e.g. no, zoom and rotation...
        return event.touches ? event.touches.length : 1;
    }


    /**
     * get the x and y positions from the event object
     * @param  event
     * @return array  [{ x: int, y: int }]
     */
    function getXYfromEvent( event )
    {
        event = event || window.event;

        // no touches, use the event pageX and pageY
        if(!_has_touch) {
            var doc = document,
                body = doc.body;

            return [{
                x: event.pageX || event.clientX + ( doc && doc.scrollLeft || body && body.scrollLeft || 0 ) - ( doc && doc.clientLeft || body && doc.clientLeft || 0 ),
                y: event.pageY || event.clientY + ( doc && doc.scrollTop || body && body.scrollTop || 0 ) - ( doc && doc.clientTop || body && doc.clientTop || 0 )
            }];
        }
        // multitouch, return array with positions
        else {
            var pos = [], src, touches = event.touches.length > 0 ? event.touches : event.changedTouches;
            for(var t=0, len=touches.length; t<len; t++) {
                src = touches[t];
                pos.push({ x: src.pageX, y: src.pageY });
            }
            return pos;
        }
    }


    /**
     * calculate the angle between two points
     * @param   object  pos1 { x: int, y: int }
     * @param   object  pos2 { x: int, y: int }
     */
    function getAngle( pos1, pos2 )
    {
        return Math.atan2(pos2.y - pos1.y, pos2.x - pos1.x) * 180 / Math.PI;
    }


    /**
     * calculate the scale size between two fingers
     * @param   object  pos_start
     * @param   object  pos_move
     * @return  float   scale
     */
    function calculateScale(pos_start, pos_move)
    {
        if(pos_start.length == 2 && pos_move.length == 2) {
            var x, y;

            x = pos_start[0].x - pos_start[1].x;
            y = pos_start[0].y - pos_start[1].y;
            var start_distance = Math.sqrt((x*x) + (y*y));

            x = pos_move[0].x - pos_move[1].x;
            y = pos_move[0].y - pos_move[1].y;
            var end_distance = Math.sqrt((x*x) + (y*y));

            return end_distance / start_distance;
        }

        return 0;
    }


    /**
     * calculate the rotation degrees between two fingers
     * @param   object  pos_start
     * @param   object  pos_move
     * @return  float   rotation
     */
    function calculateRotation(pos_start, pos_move)
    {
        if(pos_start.length == 2 && pos_move.length == 2) {
            var x, y;

            x = pos_start[0].x - pos_start[1].x;
            y = pos_start[0].y - pos_start[1].y;
            var start_rotation = Math.atan2(y, x) * 180 / Math.PI;

            x = pos_move[0].x - pos_move[1].x;
            y = pos_move[0].y - pos_move[1].y;
            var end_rotation = Math.atan2(y, x) * 180 / Math.PI;

            return end_rotation - start_rotation;
        }

        return 0;
    }


    /**
     * trigger an event/callback by name with params
     * @param string name
     * @param array  params
     */
    function triggerEvent( eventName, params )
    {
        // return touches object
        params.touches = getXYfromEvent(params.originalEvent);
        params.type = eventName;

        // trigger callback
        if(isFunction(self["on"+ eventName])) {
            self["on"+ eventName].call(self, params);
        }
    }


    /**
     * cancel event
     * @param   object  event
     * @return  void
     */

    function cancelEvent(event)
    {
        if (!options.cancel_event) { return; };

        event = event || window.event;
        if(event.preventDefault){
            event.preventDefault();
            event.stopPropagation();
        }else{
            event.returnValue = false;
            event.cancelBubble = true;
        }
    }


    /**
     * reset the internal vars to the start values
     */
    function reset()
    {
        _pos = {};
        _first = false;
        _fingers = 0;
        _distance = 0;
        _angle = 0;
        _gesture = null;
    }


    var gestures = {
        // hold gesture
        // fired on touchstart
        hold : function(event)
        {
            // only when one finger is on the screen
            if(options.hold) {
                _gesture = 'hold';
                clearTimeout(_hold_timer);

                _hold_timer = setTimeout(function() {
                    if(_gesture == 'hold') {
                        triggerEvent("hold", {
                            originalEvent   : event,
                            position        : _pos.start
                        });
                    }
                }, options.hold_timeout);
            }
        },

        // swipe gesture
        // fired on touchend
        swipe : function(event)
        {
            if(!_pos.move) {
                return;
            }

            // get the distance we moved
            var _distance_x = _pos.move[0].x - _pos.start[0].x;
            var _distance_y = _pos.move[0].y - _pos.start[0].y;
            _distance = Math.sqrt(_distance_x*_distance_x + _distance_y*_distance_y);

            // compare the kind of gesture by time
            var now = new Date().getTime();
            var touch_time = now - _touch_start_time;

            if(options.swipe && (options.swipe_time > touch_time) && (_distance > options.swipe_min_distance)) {
                // calculate the angle
                _angle = getAngle(_pos.start[0], _pos.move[0]);
                _direction = self.getDirectionFromAngle(_angle);

                _gesture = 'swipe';

                var position = { x: _pos.move[0].x - _offset.left,
                    y: _pos.move[0].y - _offset.top };

                var event_obj = {
                    originalEvent   : event,
                    position        : position,
                    direction       : _direction,
                    distance        : _distance,
                    distanceX       : _distance_x,
                    distanceY       : _distance_y,
                    angle           : _angle
                };

                // normal slide event
                triggerEvent("swipe", event_obj);
            }
        },


        // drag gesture
        // fired on mousemove
        drag : function(event)
        {
            // get the distance we moved
            var _distance_x = _pos.move[0].x - _pos.start[0].x;
            var _distance_y = _pos.move[0].y - _pos.start[0].y;
            _distance = Math.sqrt(_distance_x * _distance_x + _distance_y * _distance_y);

            // drag
            // minimal movement required
            if(options.drag && (_distance > options.drag_min_distance) || _gesture == 'drag') {
                // calculate the angle
                _angle = getAngle(_pos.start[0], _pos.move[0]);
                _direction = self.getDirectionFromAngle(_angle);

                // check the movement and stop if we go in the wrong direction
                var is_vertical = (_direction == 'up' || _direction == 'down');
                if(((is_vertical && !options.drag_vertical) || (!is_vertical && !options.drag_horizontal))
                    && (_distance > options.drag_min_distance)) {
                    return;
                }

                var interim_angle = getAngle(_pos.interim || _pos.start[0], _pos.move[0]),
                    interim_direction = self.getDirectionFromAngle(interim_angle);
                _pos.interim = _pos.move[0];


                _gesture = 'drag';

                var position = { x: _pos.move[0].x - _offset.left,
                    y: _pos.move[0].y - _offset.top };

                var event_obj = {
                    originalEvent   : event,
                    position        : position,
                    direction       : _direction,
                    distance        : _distance,
                    distanceX       : _distance_x,
                    distanceY       : _distance_y,
                    angle           : _angle,
                    interim_angle: interim_angle,
                    interim_direction: interim_direction
                };

                // on the first time trigger the start event
                if(_first) {
                    triggerEvent("dragstart", event_obj);

                    _first = false;
                }

                // normal slide event
                triggerEvent("drag", event_obj);

                cancelEvent(event);
            }
        },


        // transform gesture
        // fired on touchmove
        transform : function(event)
        {
            if(options.transform) {
                if(countFingers(event) != 2) {
                    return false;
                }

                var rotation = calculateRotation(_pos.start, _pos.move);
                var scale = calculateScale(_pos.start, _pos.move);

                if(_gesture != 'drag' &&
                    (_gesture == 'transform' || Math.abs(1-scale) > options.scale_treshold || Math.abs(rotation) > options.rotation_treshold)) {
                    _gesture = 'transform';

                    _pos.center = {  x: ((_pos.move[0].x + _pos.move[1].x) / 2) - _offset.left,
                        y: ((_pos.move[0].y + _pos.move[1].y) / 2) - _offset.top };

                    var event_obj = {
                        originalEvent   : event,
                        position        : _pos.center,
                        scale           : scale,
                        rotation        : rotation
                    };

                    // on the first time trigger the start event
                    if(_first) {
                        triggerEvent("transformstart", event_obj);
                        _first = false;
                    }

                    triggerEvent("transform", event_obj);

                    cancelEvent(event);

                    return true;
                }
            }

            return false;
        },


        // tap and double tap gesture
        // fired on touchend
        tap : function(event)
        {
            // compare the kind of gesture by time
            var now = new Date().getTime();
            var touch_time = now - _touch_start_time;

            // dont fire when hold is fired
            if(options.hold && !(options.hold && options.hold_timeout > touch_time)) {
                return;
            }

            // when previous event was tap and the tap was max_interval ms ago
            var is_double_tap = (function(){
                if (_prev_tap_pos &&
                    options.tap_double &&
                    _prev_gesture == 'tap' &&
                    (_touch_start_time - _prev_tap_end_time) < options.tap_max_interval)
                {
                    var x_distance = Math.abs(_prev_tap_pos[0].x - _pos.start[0].x);
                    var y_distance = Math.abs(_prev_tap_pos[0].y - _pos.start[0].y);
                    return (_prev_tap_pos && _pos.start && Math.max(x_distance, y_distance) < options.tap_double_distance);
                }
                return false;
            })();

            if(is_double_tap) {
                _gesture = 'double_tap';
                _prev_tap_end_time = null;

                triggerEvent("doubletap", {
                    originalEvent   : event,
                    position        : _pos.start
                });
                cancelEvent(event);
            }

            // single tap is single touch
            else {
                var x_distance = (_pos.move) ? Math.abs(_pos.move[0].x - _pos.start[0].x) : 0;
                var y_distance =  (_pos.move) ? Math.abs(_pos.move[0].y - _pos.start[0].y) : 0;
                _distance = Math.max(x_distance, y_distance);

                if(_distance < options.tap_max_distance) {
                    _gesture = 'tap';
                    _prev_tap_end_time = now;
                    _prev_tap_pos = _pos.start;

                    if(options.tap) {
                        triggerEvent("tap", {
                            originalEvent   : event,
                            position        : _pos.start
                        });
                        cancelEvent(event);
                    }
                }
            }

        }

    };


    function handleEvents(event)
    {
        switch(event.type)
        {
            case 'mousedown':
            case 'touchstart':
                _pos.start = getXYfromEvent(event);
                _touch_start_time = new Date().getTime();
                _fingers = countFingers(event);
                _first = true;
                _event_start = event;

                // borrowed from jquery offset https://github.com/jquery/jquery/blob/master/src/offset.js
                var box = element.getBoundingClientRect();
                var clientTop  = element.clientTop  || document.body.clientTop  || 0;
                var clientLeft = element.clientLeft || document.body.clientLeft || 0;
                var scrollTop  = window.pageYOffset || element.scrollTop  || document.body.scrollTop;
                var scrollLeft = window.pageXOffset || element.scrollLeft || document.body.scrollLeft;

                _offset = {
                    top: box.top + scrollTop - clientTop,
                    left: box.left + scrollLeft - clientLeft
                };

                _mousedown = true;

                // hold gesture
                gestures.hold(event);

                if(options.prevent_default) {
                    cancelEvent(event);
                }
                break;

            case 'mousemove':
            case 'touchmove':
                if(!_mousedown) {
                    return false;
                }
                _event_move = event;
                _pos.move = getXYfromEvent(event);

                if(!gestures.transform(event)) {
                    gestures.drag(event);
                }
                break;

            case 'mouseup':
            case 'mouseout':
            case 'touchcancel':
            case 'touchend':
                if(!_mousedown || (_gesture != 'transform' && event.touches && event.touches.length > 0)) {
                    return false;
                }

                _mousedown = false;
                _event_end = event;
                
                var dragging = _gesture == 'drag';

                // swipe gesture
                gestures.swipe(event);


                // drag gesture
                // dragstart is triggered, so dragend is possible
                if(dragging) {
                    triggerEvent("dragend", {
                        originalEvent   : event,
                        direction       : _direction,
                        distance        : _distance,
                        angle           : _angle
                    });
                }

                // transform
                // transformstart is triggered, so transformed is possible
                else if(_gesture == 'transform') {
                    triggerEvent("transformend", {
                        originalEvent   : event,
                        position        : _pos.center,
                        scale           : calculateScale(_pos.start, _pos.move),
                        rotation        : calculateRotation(_pos.start, _pos.move)
                    });
                }
                else {
                    gestures.tap(_event_start);
                }

                _prev_gesture = _gesture;

                // trigger release event
                triggerEvent("release", {
                    originalEvent   : event,
                    gesture         : _gesture
                });

                // reset vars
                reset();
                break;
        }
    }


    // bind events for touch devices
    // except for windows phone 7.5, it doesnt support touch events..!
    if(_has_touch) {
        addEvent(element, "touchstart touchmove touchend touchcancel", handleEvents);
    }
    // for non-touch
    else {
        addEvent(element, "mouseup mousedown mousemove", handleEvents);
        addEvent(element, "mouseout", function(event) {
            if(!isInsideHammer(element, event.relatedTarget)) {
                handleEvents(event);
            }
        });
    }


    /**
     * find if element is (inside) given parent element
     * @param   object  element
     * @param   object  parent
     * @return  bool    inside
     */
    function isInsideHammer(parent, child) {
        // get related target for IE
        if(!child && window.event && window.event.toElement){
            child = window.event.toElement;
        }

        if(parent === child){
            return true;
        }

        // loop over parentNodes of child until we find hammer element
        if(child){
            var node = child.parentNode;
            while(node !== null){
                if(node === parent){
                    return true;
                };
                node = node.parentNode;
            }
        }
        return false;
    }


    /**
     * merge 2 objects into a new object
     * @param   object  obj1
     * @param   object  obj2
     * @return  object  merged object
     */
    function mergeObject(obj1, obj2) {
        var output = {};

        if(!obj2) {
            return obj1;
        }

        for (var prop in obj1) {
            if (prop in obj2) {
                output[prop] = obj2[prop];
            } else {
                output[prop] = obj1[prop];
            }
        }
        return output;
    }


    /**
     * check if object is a function
     * @param   object  obj
     * @return  bool    is function
     */
    function isFunction( obj ){
        return Object.prototype.toString.call( obj ) == "[object Function]";
    }


    /**
     * attach event
     * @param   node    element
     * @param   string  types
     * @param   object  callback
     */
    function addEvent(element, types, callback) {
        types = types.split(" ");
        for(var t= 0,len=types.length; t<len; t++) {
            if(element.addEventListener){
                element.addEventListener(types[t], callback, false);
            }
            else if(document.attachEvent){
                element.attachEvent("on"+ types[t], callback);
            }
        }
    }
}

index.css

html, body {height:100%;}

/*html {display:table; width:100%;}
body {display:table-cell; text-align:center; vertical-align:middle;}*/

html {overflow:hidden; -moz-touch-action:none;-webkit-touch-action:none;-ms-touch-action:none;touch-action:none;}

* {-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;-o-user-select:none;user-select:none; -webkit-user-drag:none;-moz-user-drag:none;-ms-user-drag:none;-o-user-drag:none;user-drag:none;}

*,
*:before,
*:after {-moz-box-sizing:border-box;-webkit-box-sizing:border-box;-ms-box-sizing:border-box;-o-box-sizing:border-box;box-sizing:border-box;}

body {font-size:250%; text-align:center; margin:0; padding-top:1em;}

.by {margin:0; position:absolute; bottom:1em; right:1em; font-size:50%; margin:1em;}

a.chromexperiment {margin:0; position:absolute; bottom:1em; left:1em; font-size:50%; margin:1em;}
a.chromexperiment img {vertical-align:bottom;}

.ball,
.ball b,
.crate,
.ground {vertical-align:bottom;}

.ball {display:inline-block; width:3em; height:3em; border-radius:100%; border:.4em solid; color:#dc3132; position:relative;}
.ball b {display:block; width:100%; border:.2em solid; border-radius:.2em;}

.ball {padding:.4em 0;}
.ball > div {width:100%; height:100%; position:relative;}
.ball b {position:absolute; left:100%; top:50%;margin-top:-.2em; margin-left:.45em;}
.ball b:first-child,
.ball b:last-child {margin-left:.3em;}
.ball b:first-child {top:0;}
.ball b:last-child {top:auto;margin-top:auto;bottom:0;margin-bottom:-.2em;}
.crate {display:inline-block; width:1em; height:1em; border:.13em solid #30aebf; border-radius:.05em;}
.ground {display:inline-block; width:12em; border:.2em solid; color:#8cc924; border-radius:.15em;}

.wall {position:absolute; background-color:rgba(0,0,0,.1);}
.wall.left,
.wall.right {height:100%; width:.5em; top:0;}
.wall.top,
.wall.bottom {width:100%; height:.5em; left:0;}
.wall.left {left:0;}
.wall.top {top:0;}
.wall.right {right:0;}
.wall.bottom {bottom:0;}

.ball,
.ball+.crate,
.ground {display:block; margin:0 auto;}

/* Debug */
#stats {position:fixed; left:0; top:0;}
#stats + #stats {left:80px;}

@media (max-width:700px) {
	@-webkit-viewport {
	  orientation:portrait;
	}
	@viewport {
	  orientation:portrait;
	}
	.ball {font-size:50%}

	.dg {display:none;}
	.ground {width:4em;}

	a.chromexperiment img {height:3em;}
}

index.html

<!DOCTYPE html>
<html>
<head>
  <meta charset=utf-8>
  <meta name="viewport" content="width=device-width,minimum-scale=1,maximum-scale=1,initial-scale=1,user-scalable=no">
  <title>box2d</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <div class="ball">
    <div>
      <b></b>
      <b></b>
      <b></b>
    </div>
  </div>
  <div class="crate"></div>
  <div class="crate"></div><div class="crate"></div>
  <!--<div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div><div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div>-->
  
  <div class="ground"></div>

  <div class="wall left"></div>
  <div class="wall top"></div>
  <div class="wall right"></div>
  <div class="wall bottom"></div>

  <p class="by">
    — by <a href="http://abernier.name">abernier</a>
  </p>

  <a class="chromexperiment" href="http://www.chromeexperiments.com/detail/box2d-mobile/"><img src="http://1-ps.googleusercontent.com/x/s.chromexperiments-hrd.appspot.com/www.chromeexperiments.com/img/xbadge-black_white.png.pagespeed.ic.hWVg32DNYM.png" alt></a>

  <!--<script src="http://box2dweb.googlecode.com/svn/trunk/Box2D.js"></script>
  <script src="https://raw.github.com/gist/1579671/rAF.js"></script>
  <script src="https://raw.github.com/gist/3225993/loop.js"></script>
  <script src="http://code.jquery.com/jquery-latest.js"></script>
  <script src="http://dat-gui.googlecode.com/git/build/dat.gui.js"></script>-->
  <script src="Box2D.js"></script>
  <script src="rAF.js"></script>
  <script src="loop.js"></script>
  <script src="underscore.js"></script>
  <script src="backbone.js"></script>
  <script src="jquery-latest.js"></script>
  <script src="dat.gui.js"></script>
  <script src="stats.min.js"></script>
  <script src="jquery.hotkeys.js"></script>
  <script src="index.js"></script>

<script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','//www.google-analytics.com/analytics.js','ga');

ga('create', 'UA-13126287-1', 'abernier.name');
ga('send', 'pageview');
</script>
</body>
</html>

index.js

(function () {

// Flatten Box2d (ugly but handy!)
(function b2(o) {
  for (k in o) {
    if (o.hasOwnProperty(k)) {
      if ($.isPlainObject(o[k])) {
        b2(o[k]);
      } else if (/^b2/.test(k)) {
        window[k] = o[k];
      }
    }
  }
}(Box2D));

// Inheritance utility (see: http://coffeescript.org/#try:class%20A%0Aclass%20B%20extends%20A)
function inherit(child, parent) {
  for (var key in parent) {
    if (parent.hasOwnProperty(key)) {
      child[key] = parent[key];
    }
  }

  function ctor() {this.constructor = child;}
  ctor.prototype = parent.prototype;
  child.prototype = new ctor();
  child.uber = parent.prototype;

  return child;
};

//
// TODO Shims (to add)
//
// Function.prototype.bind
// Array.prototype.indexOf


var SCALE = 150;
function Real(options) {
  options || (options = {});

  options = $.extend(true, {
    debug: false
  }, options);

  this.clock = new Real.Timer();
  this.world = new b2World(
    new b2Vec2(0, 9.81), // gravity
    true                 // allow sleep
  );

  this.loop = new Loop(this.loop.bind(this)/*, 1000/10*/);
  //this.drawLoop = new Loop(this.drawLoop.bind(this));

  this.elements = [];

  // debug
  this.debug = !!options.debug;
  if (this.debug) {
    this.setDebugDraw();
  }

  this.updatePerf = new Stats();
  $('body').append(this.updatePerf.domElement);

  this.drawPerf = new Stats();
  $('body').append(this.drawPerf.domElement);
}
Real.prototype.setDebugDraw = function () {
  if ($('canvas.debugDraw').length > 0) return;

  var $window = $('html');
  var debugDraw = new b2DebugDraw();
  this.debugDraw = debugDraw;
  debugDraw.SetSprite($('<canvas class="debugDraw" width="' + ($window.width()) + '" height="' + ($window.height()) + '"/>').css({
    position: 'fixed',
    left: 0,
    top: 0,
    width: '100%',
    height: '100%',
    zIndex: -1
  }).appendTo('body').get(0).getContext("2d"));
  debugDraw.SetDrawScale(SCALE);
  debugDraw.SetFillAlpha(0.8);
  debugDraw.SetLineThickness(0.5);
  debugDraw.SetFlags(b2DebugDraw.e_shapeBit | b2DebugDraw.e_jointBit | b2DebugDraw.e_centerOfMassBit);
  this.world.SetDebugDraw(debugDraw);
};
Real.prototype.unsetDebugDraw = function () {
  real.world.SetDebugDraw(null);
  $('canvas.debugDraw').remove();
};
Real.prototype.step = function (dt) {
  this.updatePerf.begin();

  this.world.Step(
    dt / 1000, //frame-rate
    8,   //velocity iterations
    3    //position iterations
  );

  if (this.debug) {
    this.world.DrawDebugData();
  }

  var i = this.elements.length;
  while (i--) {
    this.elements[i].update();
  }

  this.updatePerf.end();
};
Real.prototype.draw = function (smooth) {
  this.drawPerf.begin();

  var i = this.elements.length;
  while (i--) {
    this.elements[i].draw(smooth);
  }

  this.drawPerf.end();
};
Real.prototype.start = function () {
  this.clock.start();
  this.loop.start();
  //this.drawLoop.start();
};
Real.prototype.loop = function () {
  // http://gafferongames.com/game-physics/fix-your-timestep/
  // http://www.koonsolo.com/news/dewitters-gameloop/
  // http://www.unagames.com/blog/daniele/2010/06/fixed-time-step-implementation-box2d
  // http://codeincomplete.com/posts/2011/10/25/javascript_boulderdash/
  // http://actionsnippet.com/swfs/qbox_FRIM.html
  // http://gamesfromwithin.com/casey-and-the-clearly-deterministic-contraptions
  
  this.clock.tick();
  while (this.clock.accumulator >= this.clock.dt) {

    //console.log('update');
    this.step(this.clock.dt);
    this.clock.subtick();
  }
  this.world.ClearForces();
  
  this.draw(true);
};
Real.prototype.stop = function () {
  this.loop.stop();
  this.clock.stop();
  //this.drawLoop.stop();
};
Real.prototype.addElement = function (element) {
  this.elements.push(element);

  return element;
};
Real.prototype.removeElement = function (element) {
  this.world.DestroyBody(this.elements[i].body);
  this.elements.splice(this.element.indexOf(element), 1);
};
Real.prototype.findElement = function (el) {
  var i = this.elements.length;
  while (i--) {
    if (this.elements[i].el === el) {
      return this.elements[i];
    }
  }
};

function Timer() {
  this.t = 0;
  this.dt = 1000/60; // Max FPS

  this.currentTime = void 0;
  this.accumulator = void 0;

  this.dtMax = 1000/4; // Min FPS
}
Timer.prototype.start = function () {
  if (this.currentTime) {
    return;
  }
  this.currentTime = new Date().getTime();
  this.accumulator = 0;

  return this;
};
Timer.prototype.stop = function () {
  if (!this.currentTime) {
    return;
  }
  this.currentTime = void 0;
  this.accumulator = void 0;

  return this;
};
Timer.prototype.tick = function () {
  if (!this.currentTime) {
    throw "Timer not started!";
  }
  var newTime = new Date().getTime();

  var frameTime = newTime - this.currentTime;
  frameTime = Math.min(frameTime, this.dtMax);

  this.currentTime = newTime;
  
  this.accumulator += frameTime;

  return this;
};
Timer.prototype.subtick = function () {
  this.t           += this.dt;
  this.accumulator -= this.dt;
};
Real.Timer = Timer;


function State() {
  this.set.apply(this, arguments);
}
State.prototype.set = function (x, y, a) {
  this.x = x;
  this.y = y;
  this.a = a;

  return this;
};

function Element(el, real, options) {
  options || (options = {});

  this.$el = $(el);
  this.el = this.$el[0];

  // Defaults
  options = $.extend(true, {
    body: {
      type: b2Body.b2_dynamicBody,
    },
    fixture: {
      density: 1,
      friction: 0.5,
      restitution: 0.2,
      shape: b2PolygonShape
    }
  }, options);

  this.$el.addClass('element');

  this.real = real;

  // Fixture
  var fixDef = new b2FixtureDef;
  fixDef.density = options.fixture.density;
  fixDef.friction = options.fixture.friction;
  fixDef.restitution = options.fixture.restitution;
  // Shape
  if (options.fixture.shape === b2PolygonShape) {
    fixDef.shape = new b2PolygonShape;
    fixDef.shape.SetAsBox(
      this.$el.outerWidth() / 2 / SCALE, //half width
      this.$el.outerHeight() / 2 / SCALE  //half height
    );
  } else {
    fixDef.shape = new b2CircleShape(this.$el.outerWidth() / 2 / SCALE);
  }

  // Body
  var bodyDef = new b2BodyDef;
  bodyDef.type = options.body.type;
  this.origPos = {
    left: this.$el.offset().left,
    top: this.$el.offset().top,
    width: this.$el.outerWidth(),
    height: this.$el.outerHeight()
  };
  bodyDef.position.x = (this.origPos.left + this.origPos.width / 2) / SCALE;
  bodyDef.position.y = (this.origPos.top + this.origPos.height / 2) / SCALE;

  // Add to world
  this.body = real.world.CreateBody(bodyDef);
  this.body.CreateFixture(fixDef);

  var pos = this.body.GetPosition();
  var ang = this.body.GetAngle();
  this.state = new State(pos.x, pos.y, ang);
}
Element.prototype.update = function () {
  var pos = this.body.GetPosition();
  var ang = this.body.GetAngle();

  var x = pos.x;
  var y = pos.y;
  var a = ang;

  this.previousState = this.state; // backup previous state
  this.state = new State(x, y, a);
};
Element.prototype.draw = function (smooth) {
  if (this.body.GetType() === b2Body.b2_staticBody) {
    return;
  }

  var state;

  // Interpolate with previous state
  if (false && smooth && this.previousState) {
    /*var accumulator = this.real.clock.accumulator/1000

    var v = this.body.GetLinearVelocity();
    var w = this.body.GetAngularVelocity();

    x += v.x * accumulator;
    y += v.y * accumulator;
    a += w * accumulator;*/

    var fixedTimestepAccumulatorRatio = this.real.clock.accumulator / this.real.clock.dt;
    var oneMinusRatio = 1 - fixedTimestepAccumulatorRatio;

    var x = this.state.x * fixedTimestepAccumulatorRatio + oneMinusRatio * this.previousState.x;
    var y = this.state.y * fixedTimestepAccumulatorRatio + oneMinusRatio * this.previousState.y;
    var a = this.state.a * fixedTimestepAccumulatorRatio + oneMinusRatio * this.previousState.a;

    state = new State(x, y, a);
  } else {
    state = this.state;
  }

  var origPos = this.origPos;

  this.$el.css('transform', 'translate3d(' + ~~(state.x*SCALE - origPos.left  - origPos.width / 2) + 'px, ' + ~~(state.y*SCALE - origPos.top - origPos.height / 2) + 'px, 0) rotate3d(0,0,1,' + ~~(state.a * 180 / Math.PI) + 'deg)');
  //this.el.style.webkitTransform = 'translate3d(' + ~~(state.x*SCALE - origPos.left  - origPos.width / 2) + 'px, ' + ~~(state.y*SCALE - origPos.top - origPos.height / 2) + 'px, 0) rotate3d(0,0,1,' + ~~(state.a * 180 / Math.PI) + 'deg)';
};
Real.Element = Element;

function Joint(real, elA, elB) {
  elementA = real.findElement(elA);
  elementB = real.findElement(elB);

  if (!elementA || !elementB) {
    return;
  }

  var springDef;
  springDef = new b2DistanceJointDef();
  springDef.bodyA = elementA.body;
  springDef.bodyB = elementB.body;
  springDef.localAnchorA = springDef.bodyA.GetLocalCenter();
  springDef.localAnchorB = springDef.bodyB.GetLocalCenter();
  springDef.collideConnected = true;
  //springDef.dampingRatio = .2;
  //springDef.frequencyHz = .5
  springDef.length = (function () {
    var v = springDef.bodyB.GetWorldPoint(springDef.localAnchorB);
    v.Subtract(springDef.bodyA.GetWorldPoint(springDef.localAnchorA))
    return v.Length();
  }())

  real.world.CreateJoint(springDef)
};
Real.Joint = Joint;

//
// Ground
//

BallElement = (function(uber) {

  inherit(BallElement, uber);

  function angleVV(v1, v2) {
    var n1 = v1.Length();
    var n2 = v2.Length();

    return Math.atan2(v1.y/n1, v1.x/n1) - Math.atan2(v2.y/n2, v2.x/n2);
  }

  function BallElement() {
    BallElement.uber.constructor.apply(this, arguments);
    this.$tails = this.$el.find('b');
    this.$tailsContainer = this.$tails.parent();
  }
  BallElement.prototype.draw = function (smooth) {
    BallElement.uber.draw.apply(this, arguments);

    var state = this.state;

    var vel = this.body.GetLinearVelocityFromLocalPoint(new b2Vec2(0,0));
    //$tails.parent().css('transform', 'rotate3d(0,0,1,' + ~~((-this.body.GetAngle() + angleVV(vel, new b2Vec2(0, 1)) - Math.PI / 2) * 180 / Math.PI) + 'deg)')
    this.$tailsContainer.css('transform', 'rotate3d(0,0,1,' + ((-state.a + angleVV(vel, new b2Vec2(0, 1)) - Math.PI / 2) * 180 / Math.PI) + 'deg)');
    //this.$tailsContainer[0].style.webkitTransform = 'rotate3d(0,0,1,' + ((-state.a + angleVV(vel, new b2Vec2(0, 1)) - Math.PI / 2) * 180 / Math.PI) + 'deg)';

    (function ($tails) {
      var i = $tails.length;
      var velocity = vel.Length();
      while (i--) {
        var tailStyle = $tails[i].style;

        tailStyle.width =  velocity * 10 + '%';
        tailStyle.opacity = velocity / 10;
      }

    }(this.$tails));

  };

  return BallElement;

})(Element);

var real = new Real();
window.real = real;

real.addElement(new Real.Element($('.ground'), real, {body: {type: b2Body.b2_staticBody}}));
real.addElement(new BallElement($('.ball'), real, {fixture: {shape: b2CircleShape}}, BallElement));
$('.crate').each(function () {
  real.addElement(new Real.Element(this, real));
});
$(document.body).on('click touchstart', function (e) {
  if (e.target !== document.body) return;

  e = (~e.type.indexOf('touch') ? e.originalEvent.targetTouches[0] : e);

  var $el = $('<div class="crate" style="position:absolute;left:' + e.pageX + 'px; top:' + e.pageY + 'px;"/>').appendTo('body');
  real.addElement(new Real.Element($el[0], real));
});
$('.wall').each(function () {
  real.addElement(new Real.Element(this, real, {body: {type: b2Body.b2_staticBody}}));
});
real.addElement(new Real.Element($('.by')[0], real));
real.addElement(new Real.Element($('.chromexperiment')[0], real));

//new Real.Joint(real, $('.crate').get(0), $('.crate').get(1));
//new Real.Joint(real, $('.crate').get(1), $('.crate').get(2));

//
// MouseJoint
//

var mouse = new b2Vec2();
window.mouse = mouse;
var mouseJointDef = new b2MouseJointDef();
mouseJointDef.target = mouse;
mouseJointDef.bodyA = real.world.GetGroundBody();
mouseJointDef.collideConnected = true;

var mouseJoint;
var $elements = $(real.elements.map(function (element) {
  return element.el;
}));

function setMouse(e) {
  e = (~e.type.indexOf('touch') ? e.originalEvent.targetTouches[0] : e);

  mouse.Set(e.pageX / SCALE, e.pageY / SCALE);
}

function mousedown(e) {
  setMouse(e);

  $(document.body).undelegate('.element', 'mousedown touchstart', mousedown);
  $(window).one('mouseup touchend', mouseup);

  var element = real.findElement(this);
  var body = element && element.body;

  mouseJointDef.bodyB = body;
  mouseJointDef.maxForce = 100 * body.GetMass();

  mouseJoint = real.world.CreateJoint(mouseJointDef);
  mouseJoint.SetTarget(mouse);

  $(document).on('mousemove touchmove', mousemove);
}

function mouseup(e) {
  if (mouseJoint) {
    real.world.DestroyJoint(mouseJoint);
  }
  
  $(document.body).delegate('.element', 'mousedown touchstart', mousedown);
  $(window).off('mousemove touchmove', mousemove);
}

function mousemove(e) {
  e.preventDefault(); // http://stackoverflow.com/questions/11204460/the-touchmove-event-on-android-system-transformer-prime

  setMouse(e);
  mouseJointDef.bodyB.SetAwake(true);
}

$(document.body).delegate('.element', 'mousedown touchstart', mousedown);

// 
$(window).load(function () {
  real.start();

  if (window.DeviceMotionEvent) {
    real.world.m_allowSleep = false;
    function ondevicemotion(e) {
      real.world.SetGravity(new b2Vec2(-e.accelerationIncludingGravity.x, e.accelerationIncludingGravity.y));
    }
    window.addEventListener('devicemotion', ondevicemotion, false);
  }

  // prevent scroll
  document.ontouchstart = function(e){ 
      e.preventDefault(); // http://stackoverflow.com/questions/2890361/disable-scrolling-in-an-iphone-web-application#answer-2890530
  }

  // GUI

  var gui = new dat.GUI;
  gui.add(real, 'debug').onChange(function(value) {
    if (value) {
      real.setDebugDraw();
    } else {
      real.unsetDebugDraw();
    }
  });

  $(window).bind('keydown', 'space', function () {
    console.log('space', real.started);
    if (real.loop.id) {
      real.stop();
    } else {
      real.start()
    }
  });
});

}(jQuery, Box2D));

index2.html

<!DOCTYPE html>
<html>
<head>
  <meta charset=utf-8>
  <title>box2d</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <div class="ball">
    <div>
      <b></b>
      <b></b>
      <b></b>
    </div>
  </div><br>
  <div class="crate"></div><br>
  <div class="crate"></div><div class="crate"></div><br>
  <!--<div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div><div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div> <div class="crate"></div><div class="crate"></div>-->
  
  <div class="ground"></div>

  <div class="wall left"></div>
  <div class="wall top"></div>
  <div class="wall right"></div>
  <div class="wall bottom"></div>

  <!--<script src="http://box2dweb.googlecode.com/svn/trunk/Box2D.js"></script>
  <script src="https://raw.github.com/gist/1579671/rAF.js"></script>
  <script src="https://raw.github.com/gist/3225993/loop.js"></script>
  <script src="http://code.jquery.com/jquery-latest.js"></script>
  <script src="http://dat-gui.googlecode.com/git/build/dat.gui.js"></script>-->
  <script src="Box2D.js"></script>
  <script src="rAF.js"></script>
  <script src="loop.js"></script>
  <script src="jquery-latest.js"></script>
  <script src="underscore.js"></script>
  <script src="backbone.js"></script>
  
  <script src="dat.gui.js"></script>
  <script src="stats.min.js"></script>
  <script src="jquery.hotkeys.js"></script>
  <script src="index2.js"></script>

</body>
</html>

index2.js

// Flatten Box2d (ugly but handy!)
(function b2(o) {
  for (k in o) {
    if (o.hasOwnProperty(k)) {
      if ($.isPlainObject(o[k])) {
        b2(o[k]);
      } else if (/^b2/.test(k)) {
        window[k] = o[k];
      }
    }
  }
}(Box2D));

// Inheritance utility
function inherit(child, parent) {
  for (var key in parent) {
    if (parent.hasOwnProperty(key)) {
      child[key] = parent[key];
    }
  }

  function ctor() {this.constructor = child;}
  ctor.prototype = parent.prototype;
  child.prototype = new ctor();
  child.uber = parent.prototype;

  return child;
};

var Real = {};

var State = Backbone.Model.extend({});

Real.Element = Backbone.View.extend({
	initialize: function () {
		var origPos = (function () {
			var $el = this.$el;
		    var offset = $el.offset();
			return {
	    		left: offset.left,
	    		top: offset.top,
	   	 		width: $el.outerWidth(),
	    		height: $el.outerHeight()
	  		};
	  	}).call(this);
	  	this.origPos = origPos;

		this.state = new State({
			x: origPos.left,
			y: origPos.top,
			a: 0
		});

		this.state.on('change', this.render.bind(this));
	},
	render: function () {
		var state = this.state;
		var origPos = this.origPos;

		this.el.style.webkitTransform = 'translate3d(' + ~~(state.get('x') - origPos.left  - origPos.width / 2) + 'px, ' + ~~(state.get('y') - origPos.top - origPos.height / 2) + 'px, 0) rotate3d(0,0,1,' + ~~(state.get('a') * 180 / Math.PI) + 'deg)';
	}
});

jquery-latest.js

/*!
 * jQuery JavaScript Library v1.8.0
 * http://jquery.com/
 *
 * Includes Sizzle.js
 * http://sizzlejs.com/
 *
 * Copyright 2012 jQuery Foundation and other contributors
 * Released under the MIT license
 * http://jquery.org/license
 *
 * Date: Thu Aug 09 2012 16:24:48 GMT-0400 (Eastern Daylight Time)
 */
(function( window, undefined ) {
var
	// A central reference to the root jQuery(document)
	rootjQuery,

	// The deferred used on DOM ready
	readyList,

	// Use the correct document accordingly with window argument (sandbox)
	document = window.document,
	location = window.location,
	navigator = window.navigator,

	// Map over jQuery in case of overwrite
	_jQuery = window.jQuery,

	// Map over the $ in case of overwrite
	_$ = window.$,

	// Save a reference to some core methods
	core_push = Array.prototype.push,
	core_slice = Array.prototype.slice,
	core_indexOf = Array.prototype.indexOf,
	core_toString = Object.prototype.toString,
	core_hasOwn = Object.prototype.hasOwnProperty,
	core_trim = String.prototype.trim,

	// Define a local copy of jQuery
	jQuery = function( selector, context ) {
		// The jQuery object is actually just the init constructor 'enhanced'
		return new jQuery.fn.init( selector, context, rootjQuery );
	},

	// Used for matching numbers
	core_pnum = /[\-+]?(?:\d*\.|)\d+(?:[eE][\-+]?\d+|)/.source,

	// Used for detecting and trimming whitespace
	core_rnotwhite = /\S/,
	core_rspace = /\s+/,

	// IE doesn't match non-breaking spaces with \s
	rtrim = core_rnotwhite.test("\xA0") ? (/^[\s\xA0]+|[\s\xA0]+$/g) : /^\s+|\s+$/g,

	// A simple way to check for HTML strings
	// Prioritize #id over <tag> to avoid XSS via location.hash (#9521)
	rquickExpr = /^(?:[^#<]*(<[\w\W]+>)[^>]*$|#([\w\-]*)$)/,

	// Match a standalone tag
	rsingleTag = /^<(\w+)\s*\/?>(?:<\/\1>|)$/,

	// JSON RegExp
	rvalidchars = /^[\],:{}\s]*$/,
	rvalidbraces = /(?:^|:|,)(?:\s*\[)+/g,
	rvalidescape = /\\(?:["\\\/bfnrt]|u[\da-fA-F]{4})/g,
	rvalidtokens = /"[^"\\\r\n]*"|true|false|null|-?(?:\d\d*\.|)\d+(?:[eE][\-+]?\d+|)/g,

	// Matches dashed string for camelizing
	rmsPrefix = /^-ms-/,
	rdashAlpha = /-([\da-z])/gi,

	// Used by jQuery.camelCase as callback to replace()
	fcamelCase = function( all, letter ) {
		return ( letter + "" ).toUpperCase();
	},

	// The ready event handler and self cleanup method
	DOMContentLoaded = function() {
		if ( document.addEventListener ) {
			document.removeEventListener( "DOMContentLoaded", DOMContentLoaded, false );
			jQuery.ready();
		} else if ( document.readyState === "complete" ) {
			// we're here because readyState === "complete" in oldIE
			// which is good enough for us to call the dom ready!
			document.detachEvent( "onreadystatechange", DOMContentLoaded );
			jQuery.ready();
		}
	},

	// [[Class]] -> type pairs
	class2type = {};

jQuery.fn = jQuery.prototype = {
	constructor: jQuery,
	init: function( selector, context, rootjQuery ) {
		var match, elem, ret, doc;

		// Handle $(""), $(null), $(undefined), $(false)
		if ( !selector ) {
			return this;
		}

		// Handle $(DOMElement)
		if ( selector.nodeType ) {
			this.context = this[0] = selector;
			this.length = 1;
			return this;
		}

		// Handle HTML strings
		if ( typeof selector === "string" ) {
			if ( selector.charAt(0) === "<" && selector.charAt( selector.length - 1 ) === ">" && selector.length >= 3 ) {
				// Assume that strings that start and end with <> are HTML and skip the regex check
				match = [ null, selector, null ];

			} else {
				match = rquickExpr.exec( selector );
			}

			// Match html or make sure no context is specified for #id
			if ( match && (match[1] || !context) ) {

				// HANDLE: $(html) -> $(array)
				if ( match[1] ) {
					context = context instanceof jQuery ? context[0] : context;
					doc = ( context && context.nodeType ? context.ownerDocument || context : document );

					// scripts is true for back-compat
					selector = jQuery.parseHTML( match[1], doc, true );
					if ( rsingleTag.test( match[1] ) && jQuery.isPlainObject( context ) ) {
						this.attr.call( selector, context, true );
					}

					return jQuery.merge( this, selector );

				// HANDLE: $(#id)
				} else {
					elem = document.getElementById( match[2] );

					// Check parentNode to catch when Blackberry 4.6 returns
					// nodes that are no longer in the document #6963
					if ( elem && elem.parentNode ) {
						// Handle the case where IE and Opera return items
						// by name instead of ID
						if ( elem.id !== match[2] ) {
							return rootjQuery.find( selector );
						}

						// Otherwise, we inject the element directly into the jQuery object
						this.length = 1;
						this[0] = elem;
					}

					this.context = document;
					this.selector = selector;
					return this;
				}

			// HANDLE: $(expr, $(...))
			} else if ( !context || context.jquery ) {
				return ( context || rootjQuery ).find( selector );

			// HANDLE: $(expr, context)
			// (which is just equivalent to: $(context).find(expr)
			} else {
				return this.constructor( context ).find( selector );
			}

		// HANDLE: $(function)
		// Shortcut for document ready
		} else if ( jQuery.isFunction( selector ) ) {
			return rootjQuery.ready( selector );
		}

		if ( selector.selector !== undefined ) {
			this.selector = selector.selector;
			this.context = selector.context;
		}

		return jQuery.makeArray( selector, this );
	},

	// Start with an empty selector
	selector: "",

	// The current version of jQuery being used
	jquery: "1.8.0",

	// The default length of a jQuery object is 0
	length: 0,

	// The number of elements contained in the matched element set
	size: function() {
		return this.length;
	},

	toArray: function() {
		return core_slice.call( this );
	},

	// Get the Nth element in the matched element set OR
	// Get the whole matched element set as a clean array
	get: function( num ) {
		return num == null ?

			// Return a 'clean' array
			this.toArray() :

			// Return just the object
			( num < 0 ? this[ this.length + num ] : this[ num ] );
	},

	// Take an array of elements and push it onto the stack
	// (returning the new matched element set)
	pushStack: function( elems, name, selector ) {

		// Build a new jQuery matched element set
		var ret = jQuery.merge( this.constructor(), elems );

		// Add the old object onto the stack (as a reference)
		ret.prevObject = this;

		ret.context = this.context;

		if ( name === "find" ) {
			ret.selector = this.selector + ( this.selector ? " " : "" ) + selector;
		} else if ( name ) {
			ret.selector = this.selector + "." + name + "(" + selector + ")";
		}

		// Return the newly-formed element set
		return ret;
	},

	// Execute a callback for every element in the matched set.
	// (You can seed the arguments with an array of args, but this is
	// only used internally.)
	each: function( callback, args ) {
		return jQuery.each( this, callback, args );
	},

	ready: function( fn ) {
		// Add the callback
		jQuery.ready.promise().done( fn );

		return this;
	},

	eq: function( i ) {
		i = +i;
		return i === -1 ?
			this.slice( i ) :
			this.slice( i, i + 1 );
	},

	first: function() {
		return this.eq( 0 );
	},

	last: function() {
		return this.eq( -1 );
	},

	slice: function() {
		return this.pushStack( core_slice.apply( this, arguments ),
			"slice", core_slice.call(arguments).join(",") );
	},

	map: function( callback ) {
		return this.pushStack( jQuery.map(this, function( elem, i ) {
			return callback.call( elem, i, elem );
		}));
	},

	end: function() {
		return this.prevObject || this.constructor(null);
	},

	// For internal use only.
	// Behaves like an Array's method, not like a jQuery method.
	push: core_push,
	sort: [].sort,
	splice: [].splice
};

// Give the init function the jQuery prototype for later instantiation
jQuery.fn.init.prototype = jQuery.fn;

jQuery.extend = jQuery.fn.extend = function() {
	var options, name, src, copy, copyIsArray, clone,
		target = arguments[0] || {},
		i = 1,
		length = arguments.length,
		deep = false;

	// Handle a deep copy situation
	if ( typeof target === "boolean" ) {
		deep = target;
		target = arguments[1] || {};
		// skip the boolean and the target
		i = 2;
	}

	// Handle case when target is a string or something (possible in deep copy)
	if ( typeof target !== "object" && !jQuery.isFunction(target) ) {
		target = {};
	}

	// extend jQuery itself if only one argument is passed
	if ( length === i ) {
		target = this;
		--i;
	}

	for ( ; i < length; i++ ) {
		// Only deal with non-null/undefined values
		if ( (options = arguments[ i ]) != null ) {
			// Extend the base object
			for ( name in options ) {
				src = target[ name ];
				copy = options[ name ];

				// Prevent never-ending loop
				if ( target === copy ) {
					continue;
				}

				// Recurse if we're merging plain objects or arrays
				if ( deep && copy && ( jQuery.isPlainObject(copy) || (copyIsArray = jQuery.isArray(copy)) ) ) {
					if ( copyIsArray ) {
						copyIsArray = false;
						clone = src && jQuery.isArray(src) ? src : [];

					} else {
						clone = src && jQuery.isPlainObject(src) ? src : {};
					}

					// Never move original objects, clone them
					target[ name ] = jQuery.extend( deep, clone, copy );

				// Don't bring in undefined values
				} else if ( copy !== undefined ) {
					target[ name ] = copy;
				}
			}
		}
	}

	// Return the modified object
	return target;
};

jQuery.extend({
	noConflict: function( deep ) {
		if ( window.$ === jQuery ) {
			window.$ = _$;
		}

		if ( deep && window.jQuery === jQuery ) {
			window.jQuery = _jQuery;
		}

		return jQuery;
	},

	// Is the DOM ready to be used? Set to true once it occurs.
	isReady: false,

	// A counter to track how many items to wait for before
	// the ready event fires. See #6781
	readyWait: 1,

	// Hold (or release) the ready event
	holdReady: function( hold ) {
		if ( hold ) {
			jQuery.readyWait++;
		} else {
			jQuery.ready( true );
		}
	},

	// Handle when the DOM is ready
	ready: function( wait ) {

		// Abort if there are pending holds or we're already ready
		if ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {
			return;
		}

		// Make sure body exists, at least, in case IE gets a little overzealous (ticket #5443).
		if ( !document.body ) {
			return setTimeout( jQuery.ready, 1 );
		}

		// Remember that the DOM is ready
		jQuery.isReady = true;

		// If a normal DOM Ready event fired, decrement, and wait if need be
		if ( wait !== true && --jQuery.readyWait > 0 ) {
			return;
		}

		// If there are functions bound, to execute
		readyList.resolveWith( document, [ jQuery ] );

		// Trigger any bound ready events
		if ( jQuery.fn.trigger ) {
			jQuery( document ).trigger("ready").off("ready");
		}
	},

	// See test/unit/core.js for details concerning isFunction.
	// Since version 1.3, DOM methods and functions like alert
	// aren't supported. They return false on IE (#2968).
	isFunction: function( obj ) {
		return jQuery.type(obj) === "function";
	},

	isArray: Array.isArray || function( obj ) {
		return jQuery.type(obj) === "array";
	},

	isWindow: function( obj ) {
		return obj != null && obj == obj.window;
	},

	isNumeric: function( obj ) {
		return !isNaN( parseFloat(obj) ) && isFinite( obj );
	},

	type: function( obj ) {
		return obj == null ?
			String( obj ) :
			class2type[ core_toString.call(obj) ] || "object";
	},

	isPlainObject: function( obj ) {
		// Must be an Object.
		// Because of IE, we also have to check the presence of the constructor property.
		// Make sure that DOM nodes and window objects don't pass through, as well
		if ( !obj || jQuery.type(obj) !== "object" || obj.nodeType || jQuery.isWindow( obj ) ) {
			return false;
		}

		try {
			// Not own constructor property must be Object
			if ( obj.constructor &&
				!core_hasOwn.call(obj, "constructor") &&
				!core_hasOwn.call(obj.constructor.prototype, "isPrototypeOf") ) {
				return false;
			}
		} catch ( e ) {
			// IE8,9 Will throw exceptions on certain host objects #9897
			return false;
		}

		// Own properties are enumerated firstly, so to speed up,
		// if last one is own, then all properties are own.

		var key;
		for ( key in obj ) {}

		return key === undefined || core_hasOwn.call( obj, key );
	},

	isEmptyObject: function( obj ) {
		var name;
		for ( name in obj ) {
			return false;
		}
		return true;
	},

	error: function( msg ) {
		throw new Error( msg );
	},

	// data: string of html
	// context (optional): If specified, the fragment will be created in this context, defaults to document
	// scripts (optional): If true, will include scripts passed in the html string
	parseHTML: function( data, context, scripts ) {
		var parsed;
		if ( !data || typeof data !== "string" ) {
			return null;
		}
		if ( typeof context === "boolean" ) {
			scripts = context;
			context = 0;
		}
		context = context || document;

		// Single tag
		if ( (parsed = rsingleTag.exec( data )) ) {
			return [ context.createElement( parsed[1] ) ];
		}

		parsed = jQuery.buildFragment( [ data ], context, scripts ? null : [] );
		return jQuery.merge( [],
			(parsed.cacheable ? jQuery.clone( parsed.fragment ) : parsed.fragment).childNodes );
	},

	parseJSON: function( data ) {
		if ( !data || typeof data !== "string") {
			return null;
		}

		// Make sure leading/trailing whitespace is removed (IE can't handle it)
		data = jQuery.trim( data );

		// Attempt to parse using the native JSON parser first
		if ( window.JSON && window.JSON.parse ) {
			return window.JSON.parse( data );
		}

		// Make sure the incoming data is actual JSON
		// Logic borrowed from http://json.org/json2.js
		if ( rvalidchars.test( data.replace( rvalidescape, "@" )
			.replace( rvalidtokens, "]" )
			.replace( rvalidbraces, "")) ) {

			return ( new Function( "return " + data ) )();

		}
		jQuery.error( "Invalid JSON: " + data );
	},

	// Cross-browser xml parsing
	parseXML: function( data ) {
		var xml, tmp;
		if ( !data || typeof data !== "string" ) {
			return null;
		}
		try {
			if ( window.DOMParser ) { // Standard
				tmp = new DOMParser();
				xml = tmp.parseFromString( data , "text/xml" );
			} else { // IE
				xml = new ActiveXObject( "Microsoft.XMLDOM" );
				xml.async = "false";
				xml.loadXML( data );
			}
		} catch( e ) {
			xml = undefined;
		}
		if ( !xml || !xml.documentElement || xml.getElementsByTagName( "parsererror" ).length ) {
			jQuery.error( "Invalid XML: " + data );
		}
		return xml;
	},

	noop: function() {},

	// Evaluates a script in a global context
	// Workarounds based on findings by Jim Driscoll
	// http://weblogs.java.net/blog/driscoll/archive/2009/09/08/eval-javascript-global-context
	globalEval: function( data ) {
		if ( data && core_rnotwhite.test( data ) ) {
			// We use execScript on Internet Explorer
			// We use an anonymous function so that context is window
			// rather than jQuery in Firefox
			( window.execScript || function( data ) {
				window[ "eval" ].call( window, data );
			} )( data );
		}
	},

	// Convert dashed to camelCase; used by the css and data modules
	// Microsoft forgot to hump their vendor prefix (#9572)
	camelCase: function( string ) {
		return string.replace( rmsPrefix, "ms-" ).replace( rdashAlpha, fcamelCase );
	},

	nodeName: function( elem, name ) {
		return elem.nodeName && elem.nodeName.toUpperCase() === name.toUpperCase();
	},

	// args is for internal usage only
	each: function( obj, callback, args ) {
		var name,
			i = 0,
			length = obj.length,
			isObj = length === undefined || jQuery.isFunction( obj );

		if ( args ) {
			if ( isObj ) {
				for ( name in obj ) {
					if ( callback.apply( obj[ name ], args ) === false ) {
						break;
					}
				}
			} else {
				for ( ; i < length; ) {
					if ( callback.apply( obj[ i++ ], args ) === false ) {
						break;
					}
				}
			}

		// A special, fast, case for the most common use of each
		} else {
			if ( isObj ) {
				for ( name in obj ) {
					if ( callback.call( obj[ name ], name, obj[ name ] ) === false ) {
						break;
					}
				}
			} else {
				for ( ; i < length; ) {
					if ( callback.call( obj[ i ], i, obj[ i++ ] ) === false ) {
						break;
					}
				}
			}
		}

		return obj;
	},

	// Use native String.trim function wherever possible
	trim: core_trim ?
		function( text ) {
			return text == null ?
				"" :
				core_trim.call( text );
		} :

		// Otherwise use our own trimming functionality
		function( text ) {
			return text == null ?
				"" :
				text.toString().replace( rtrim, "" );
		},

	// results is for internal usage only
	makeArray: function( arr, results ) {
		var type,
			ret = results || [];

		if ( arr != null ) {
			// The window, strings (and functions) also have 'length'
			// Tweaked logic slightly to handle Blackberry 4.7 RegExp issues #6930
			type = jQuery.type( arr );

			if ( arr.length == null || type === "string" || type === "function" || type === "regexp" || jQuery.isWindow( arr ) ) {
				core_push.call( ret, arr );
			} else {
				jQuery.merge( ret, arr );
			}
		}

		return ret;
	},

	inArray: function( elem, arr, i ) {
		var len;

		if ( arr ) {
			if ( core_indexOf ) {
				return core_indexOf.call( arr, elem, i );
			}

			len = arr.length;
			i = i ? i < 0 ? Math.max( 0, len + i ) : i : 0;

			for ( ; i < len; i++ ) {
				// Skip accessing in sparse arrays
				if ( i in arr && arr[ i ] === elem ) {
					return i;
				}
			}
		}

		return -1;
	},

	merge: function( first, second ) {
		var l = second.length,
			i = first.length,
			j = 0;

		if ( typeof l === "number" ) {
			for ( ; j < l; j++ ) {
				first[ i++ ] = second[ j ];
			}

		} else {
			while ( second[j] !== undefined ) {
				first[ i++ ] = second[ j++ ];
			}
		}

		first.length = i;

		return first;
	},

	grep: function( elems, callback, inv ) {
		var retVal,
			ret = [],
			i = 0,
			length = elems.length;
		inv = !!inv;

		// Go through the array, only saving the items
		// that pass the validator function
		for ( ; i < length; i++ ) {
			retVal = !!callback( elems[ i ], i );
			if ( inv !== retVal ) {
				ret.push( elems[ i ] );
			}
		}

		return ret;
	},

	// arg is for internal usage only
	map: function( elems, callback, arg ) {
		var value, key,
			ret = [],
			i = 0,
			length = elems.length,
			// jquery objects are treated as arrays
			isArray = elems instanceof jQuery || length !== undefined && typeof length === "number" && ( ( length > 0 && elems[ 0 ] && elems[ length -1 ] ) || length === 0 || jQuery.isArray( elems ) ) ;

		// Go through the array, translating each of the items to their
		if ( isArray ) {
			for ( ; i < length; i++ ) {
				value = callback( elems[ i ], i, arg );

				if ( value != null ) {
					ret[ ret.length ] = value;
				}
			}

		// Go through every key on the object,
		} else {
			for ( key in elems ) {
				value = callback( elems[ key ], key, arg );

				if ( value != null ) {
					ret[ ret.length ] = value;
				}
			}
		}

		// Flatten any nested arrays
		return ret.concat.apply( [], ret );
	},

	// A global GUID counter for objects
	guid: 1,

	// Bind a function to a context, optionally partially applying any
	// arguments.
	proxy: function( fn, context ) {
		var tmp, args, proxy;

		if ( typeof context === "string" ) {
			tmp = fn[ context ];
			context = fn;
			fn = tmp;
		}

		// Quick check to determine if target is callable, in the spec
		// this throws a TypeError, but we will just return undefined.
		if ( !jQuery.isFunction( fn ) ) {
			return undefined;
		}

		// Simulated bind
		args = core_slice.call( arguments, 2 );
		proxy = function() {
			return fn.apply( context, args.concat( core_slice.call( arguments ) ) );
		};

		// Set the guid of unique handler to the same of original handler, so it can be removed
		proxy.guid = fn.guid = fn.guid || proxy.guid || jQuery.guid++;

		return proxy;
	},

	// Multifunctional method to get and set values of a collection
	// The value/s can optionally be executed if it's a function
	access: function( elems, fn, key, value, chainable, emptyGet, pass ) {
		var exec,
			bulk = key == null,
			i = 0,
			length = elems.length;

		// Sets many values
		if ( key && typeof key === "object" ) {
			for ( i in key ) {
				jQuery.access( elems, fn, i, key[i], 1, emptyGet, value );
			}
			chainable = 1;

		// Sets one value
		} else if ( value !== undefined ) {
			// Optionally, function values get executed if exec is true
			exec = pass === undefined && jQuery.isFunction( value );

			if ( bulk ) {
				// Bulk operations only iterate when executing function values
				if ( exec ) {
					exec = fn;
					fn = function( elem, key, value ) {
						return exec.call( jQuery( elem ), value );
					};

				// Otherwise they run against the entire set
				} else {
					fn.call( elems, value );
					fn = null;
				}
			}

			if ( fn ) {
				for (; i < length; i++ ) {
					fn( elems[i], key, exec ? value.call( elems[i], i, fn( elems[i], key ) ) : value, pass );
				}
			}

			chainable = 1;
		}

		return chainable ?
			elems :

			// Gets
			bulk ?
				fn.call( elems ) :
				length ? fn( elems[0], key ) : emptyGet;
	},

	now: function() {
		return ( new Date() ).getTime();
	}
});

jQuery.ready.promise = function( obj ) {
	if ( !readyList ) {

		readyList = jQuery.Deferred();

		// Catch cases where $(document).ready() is called after the
		// browser event has already occurred.
		if ( document.readyState === "complete" || ( document.readyState !== "loading" && document.addEventListener ) ) {
			// Handle it asynchronously to allow scripts the opportunity to delay ready
			setTimeout( jQuery.ready, 1 );

		// Standards-based browsers support DOMContentLoaded
		} else if ( document.addEventListener ) {
			// Use the handy event callback
			document.addEventListener( "DOMContentLoaded", DOMContentLoaded, false );

			// A fallback to window.onload, that will always work
			window.addEventListener( "load", jQuery.ready, false );

		// If IE event model is used
		} else {
			// Ensure firing before onload, maybe late but safe also for iframes
			document.attachEvent( "onreadystatechange", DOMContentLoaded );

			// A fallback to window.onload, that will always work
			window.attachEvent( "onload", jQuery.ready );

			// If IE and not a frame
			// continually check to see if the document is ready
			var top = false;

			try {
				top = window.frameElement == null && document.documentElement;
			} catch(e) {}

			if ( top && top.doScroll ) {
				(function doScrollCheck() {
					if ( !jQuery.isReady ) {

						try {
							// Use the trick by Diego Perini
							// http://javascript.nwbox.com/IEContentLoaded/
							top.doScroll("left");
						} catch(e) {
							return setTimeout( doScrollCheck, 50 );
						}

						// and execute any waiting functions
						jQuery.ready();
					}
				})();
			}
		}
	}
	return readyList.promise( obj );
};

// Populate the class2type map
jQuery.each("Boolean Number String Function Array Date RegExp Object".split(" "), function(i, name) {
	class2type[ "[object " + name + "]" ] = name.toLowerCase();
});

// All jQuery objects should point back to these
rootjQuery = jQuery(document);
// String to Object options format cache
var optionsCache = {};

// Convert String-formatted options into Object-formatted ones and store in cache
function createOptions( options ) {
	var object = optionsCache[ options ] = {};
	jQuery.each( options.split( core_rspace ), function( _, flag ) {
		object[ flag ] = true;
	});
	return object;
}

/*
 * Create a callback list using the following parameters:
 *
 *	options: an optional list of space-separated options that will change how
 *			the callback list behaves or a more traditional option object
 *
 * By default a callback list will act like an event callback list and can be
 * "fired" multiple times.
 *
 * Possible options:
 *
 *	once:			will ensure the callback list can only be fired once (like a Deferred)
 *
 *	memory:			will keep track of previous values and will call any callback added
 *					after the list has been fired right away with the latest "memorized"
 *					values (like a Deferred)
 *
 *	unique:			will ensure a callback can only be added once (no duplicate in the list)
 *
 *	stopOnFalse:	interrupt callings when a callback returns false
 *
 */
jQuery.Callbacks = function( options ) {

	// Convert options from String-formatted to Object-formatted if needed
	// (we check in cache first)
	options = typeof options === "string" ?
		( optionsCache[ options ] || createOptions( options ) ) :
		jQuery.extend( {}, options );

	var // Last fire value (for non-forgettable lists)
		memory,
		// Flag to know if list was already fired
		fired,
		// Flag to know if list is currently firing
		firing,
		// First callback to fire (used internally by add and fireWith)
		firingStart,
		// End of the loop when firing
		firingLength,
		// Index of currently firing callback (modified by remove if needed)
		firingIndex,
		// Actual callback list
		list = [],
		// Stack of fire calls for repeatable lists
		stack = !options.once && [],
		// Fire callbacks
		fire = function( data ) {
			memory = options.memory && data;
			fired = true;
			firingIndex = firingStart || 0;
			firingStart = 0;
			firingLength = list.length;
			firing = true;
			for ( ; list && firingIndex < firingLength; firingIndex++ ) {
				if ( list[ firingIndex ].apply( data[ 0 ], data[ 1 ] ) === false && options.stopOnFalse ) {
					memory = false; // To prevent further calls using add
					break;
				}
			}
			firing = false;
			if ( list ) {
				if ( stack ) {
					if ( stack.length ) {
						fire( stack.shift() );
					}
				} else if ( memory ) {
					list = [];
				} else {
					self.disable();
				}
			}
		},
		// Actual Callbacks object
		self = {
			// Add a callback or a collection of callbacks to the list
			add: function() {
				if ( list ) {
					// First, we save the current length
					var start = list.length;
					(function add( args ) {
						jQuery.each( args, function( _, arg ) {
							if ( jQuery.isFunction( arg ) && ( !options.unique || !self.has( arg ) ) ) {
								list.push( arg );
							} else if ( arg && arg.length ) {
								// Inspect recursively
								add( arg );
							}
						});
					})( arguments );
					// Do we need to add the callbacks to the
					// current firing batch?
					if ( firing ) {
						firingLength = list.length;
					// With memory, if we're not firing then
					// we should call right away
					} else if ( memory ) {
						firingStart = start;
						fire( memory );
					}
				}
				return this;
			},
			// Remove a callback from the list
			remove: function() {
				if ( list ) {
					jQuery.each( arguments, function( _, arg ) {
						var index;
						while( ( index = jQuery.inArray( arg, list, index ) ) > -1 ) {
							list.splice( index, 1 );
							// Handle firing indexes
							if ( firing ) {
								if ( index <= firingLength ) {
									firingLength--;
								}
								if ( index <= firingIndex ) {
									firingIndex--;
								}
							}
						}
					});
				}
				return this;
			},
			// Control if a given callback is in the list
			has: function( fn ) {
				return jQuery.inArray( fn, list ) > -1;
			},
			// Remove all callbacks from the list
			empty: function() {
				list = [];
				return this;
			},
			// Have the list do nothing anymore
			disable: function() {
				list = stack = memory = undefined;
				return this;
			},
			// Is it disabled?
			disabled: function() {
				return !list;
			},
			// Lock the list in its current state
			lock: function() {
				stack = undefined;
				if ( !memory ) {
					self.disable();
				}
				return this;
			},
			// Is it locked?
			locked: function() {
				return !stack;
			},
			// Call all callbacks with the given context and arguments
			fireWith: function( context, args ) {
				args = args || [];
				args = [ context, args.slice ? args.slice() : args ];
				if ( list && ( !fired || stack ) ) {
					if ( firing ) {
						stack.push( args );
					} else {
						fire( args );
					}
				}
				return this;
			},
			// Call all the callbacks with the given arguments
			fire: function() {
				self.fireWith( this, arguments );
				return this;
			},
			// To know if the callbacks have already been called at least once
			fired: function() {
				return !!fired;
			}
		};

	return self;
};
jQuery.extend({

	Deferred: function( func ) {
		var tuples = [
				// action, add listener, listener list, final state
				[ "resolve", "done", jQuery.Callbacks("once memory"), "resolved" ],
				[ "reject", "fail", jQuery.Callbacks("once memory"), "rejected" ],
				[ "notify", "progress", jQuery.Callbacks("memory") ]
			],
			state = "pending",
			promise = {
				state: function() {
					return state;
				},
				always: function() {
					deferred.done( arguments ).fail( arguments );
					return this;
				},
				then: function( /* fnDone, fnFail, fnProgress */ ) {
					var fns = arguments;
					return jQuery.Deferred(function( newDefer ) {
						jQuery.each( tuples, function( i, tuple ) {
							var action = tuple[ 0 ],
								fn = fns[ i ];
							// deferred[ done | fail | progress ] for forwarding actions to newDefer
							deferred[ tuple[1] ]( jQuery.isFunction( fn ) ?
								function() {
									var returned = fn.apply( this, arguments );
									if ( returned && jQuery.isFunction( returned.promise ) ) {
										returned.promise()
											.done( newDefer.resolve )
											.fail( newDefer.reject )
											.progress( newDefer.notify );
									} else {
										newDefer[ action + "With" ]( this === deferred ? newDefer : this, [ returned ] );
									}
								} :
								newDefer[ action ]
							);
						});
						fns = null;
					}).promise();
				},
				// Get a promise for this deferred
				// If obj is provided, the promise aspect is added to the object
				promise: function( obj ) {
					return typeof obj === "object" ? jQuery.extend( obj, promise ) : promise;
				}
			},
			deferred = {};

		// Keep pipe for back-compat
		promise.pipe = promise.then;

		// Add list-specific methods
		jQuery.each( tuples, function( i, tuple ) {
			var list = tuple[ 2 ],
				stateString = tuple[ 3 ];

			// promise[ done | fail | progress ] = list.add
			promise[ tuple[1] ] = list.add;

			// Handle state
			if ( stateString ) {
				list.add(function() {
					// state = [ resolved | rejected ]
					state = stateString;

				// [ reject_list | resolve_list ].disable; progress_list.lock
				}, tuples[ i ^ 1 ][ 2 ].disable, tuples[ 2 ][ 2 ].lock );
			}

			// deferred[ resolve | reject | notify ] = list.fire
			deferred[ tuple[0] ] = list.fire;
			deferred[ tuple[0] + "With" ] = list.fireWith;
		});

		// Make the deferred a promise
		promise.promise( deferred );

		// Call given func if any
		if ( func ) {
			func.call( deferred, deferred );
		}

		// All done!
		return deferred;
	},

	// Deferred helper
	when: function( subordinate /* , ..., subordinateN */ ) {
		var i = 0,
			resolveValues = core_slice.call( arguments ),
			length = resolveValues.length,

			// the count of uncompleted subordinates
			remaining = length !== 1 || ( subordinate && jQuery.isFunction( subordinate.promise ) ) ? length : 0,

			// the master Deferred. If resolveValues consist of only a single Deferred, just use that.
			deferred = remaining === 1 ? subordinate : jQuery.Deferred(),

			// Update function for both resolve and progress values
			updateFunc = function( i, contexts, values ) {
				return function( value ) {
					contexts[ i ] = this;
					values[ i ] = arguments.length > 1 ? core_slice.call( arguments ) : value;
					if( values === progressValues ) {
						deferred.notifyWith( contexts, values );
					} else if ( !( --remaining ) ) {
						deferred.resolveWith( contexts, values );
					}
				};
			},

			progressValues, progressContexts, resolveContexts;

		// add listeners to Deferred subordinates; treat others as resolved
		if ( length > 1 ) {
			progressValues = new Array( length );
			progressContexts = new Array( length );
			resolveContexts = new Array( length );
			for ( ; i < length; i++ ) {
				if ( resolveValues[ i ] && jQuery.isFunction( resolveValues[ i ].promise ) ) {
					resolveValues[ i ].promise()
						.done( updateFunc( i, resolveContexts, resolveValues ) )
						.fail( deferred.reject )
						.progress( updateFunc( i, progressContexts, progressValues ) );
				} else {
					--remaining;
				}
			}
		}

		// if we're not waiting on anything, resolve the master
		if ( !remaining ) {
			deferred.resolveWith( resolveContexts, resolveValues );
		}

		return deferred.promise();
	}
});
jQuery.support = (function() {

	var support,
		all,
		a,
		select,
		opt,
		input,
		fragment,
		eventName,
		i,
		isSupported,
		clickFn,
		div = document.createElement("div");

	// Preliminary tests
	div.setAttribute( "className", "t" );
	div.innerHTML = "  <link/><table></table><a href='/a'>a</a><input type='checkbox'/>";

	all = div.getElementsByTagName("*");
	a = div.getElementsByTagName("a")[ 0 ];
	a.style.cssText = "top:1px;float:left;opacity:.5";

	// Can't get basic test support
	if ( !all || !all.length || !a ) {
		return {};
	}

	// First batch of supports tests
	select = document.createElement("select");
	opt = select.appendChild( document.createElement("option") );
	input = div.getElementsByTagName("input")[ 0 ];

	support = {
		// IE strips leading whitespace when .innerHTML is used
		leadingWhitespace: ( div.firstChild.nodeType === 3 ),

		// Make sure that tbody elements aren't automatically inserted
		// IE will insert them into empty tables
		tbody: !div.getElementsByTagName("tbody").length,

		// Make sure that link elements get serialized correctly by innerHTML
		// This requires a wrapper element in IE
		htmlSerialize: !!div.getElementsByTagName("link").length,

		// Get the style information from getAttribute
		// (IE uses .cssText instead)
		style: /top/.test( a.getAttribute("style") ),

		// Make sure that URLs aren't manipulated
		// (IE normalizes it by default)
		hrefNormalized: ( a.getAttribute("href") === "/a" ),

		// Make sure that element opacity exists
		// (IE uses filter instead)
		// Use a regex to work around a WebKit issue. See #5145
		opacity: /^0.5/.test( a.style.opacity ),

		// Verify style float existence
		// (IE uses styleFloat instead of cssFloat)
		cssFloat: !!a.style.cssFloat,

		// Make sure that if no value is specified for a checkbox
		// that it defaults to "on".
		// (WebKit defaults to "" instead)
		checkOn: ( input.value === "on" ),

		// Make sure that a selected-by-default option has a working selected property.
		// (WebKit defaults to false instead of true, IE too, if it's in an optgroup)
		optSelected: opt.selected,

		// Test setAttribute on camelCase class. If it works, we need attrFixes when doing get/setAttribute (ie6/7)
		getSetAttribute: div.className !== "t",

		// Tests for enctype support on a form(#6743)
		enctype: !!document.createElement("form").enctype,

		// Makes sure cloning an html5 element does not cause problems
		// Where outerHTML is undefined, this still works
		html5Clone: document.createElement("nav").cloneNode( true ).outerHTML !== "<:nav></:nav>",

		// jQuery.support.boxModel DEPRECATED in 1.8 since we don't support Quirks Mode
		boxModel: ( document.compatMode === "CSS1Compat" ),

		// Will be defined later
		submitBubbles: true,
		changeBubbles: true,
		focusinBubbles: false,
		deleteExpando: true,
		noCloneEvent: true,
		inlineBlockNeedsLayout: false,
		shrinkWrapBlocks: false,
		reliableMarginRight: true,
		boxSizingReliable: true,
		pixelPosition: false
	};

	// Make sure checked status is properly cloned
	input.checked = true;
	support.noCloneChecked = input.cloneNode( true ).checked;

	// Make sure that the options inside disabled selects aren't marked as disabled
	// (WebKit marks them as disabled)
	select.disabled = true;
	support.optDisabled = !opt.disabled;

	// Test to see if it's possible to delete an expando from an element
	// Fails in Internet Explorer
	try {
		delete div.test;
	} catch( e ) {
		support.deleteExpando = false;
	}

	if ( !div.addEventListener && div.attachEvent && div.fireEvent ) {
		div.attachEvent( "onclick", clickFn = function() {
			// Cloning a node shouldn't copy over any
			// bound event handlers (IE does this)
			support.noCloneEvent = false;
		});
		div.cloneNode( true ).fireEvent("onclick");
		div.detachEvent( "onclick", clickFn );
	}

	// Check if a radio maintains its value
	// after being appended to the DOM
	input = document.createElement("input");
	input.value = "t";
	input.setAttribute( "type", "radio" );
	support.radioValue = input.value === "t";

	input.setAttribute( "checked", "checked" );

	// #11217 - WebKit loses check when the name is after the checked attribute
	input.setAttribute( "name", "t" );

	div.appendChild( input );
	fragment = document.createDocumentFragment();
	fragment.appendChild( div.lastChild );

	// WebKit doesn't clone checked state correctly in fragments
	support.checkClone = fragment.cloneNode( true ).cloneNode( true ).lastChild.checked;

	// Check if a disconnected checkbox will retain its checked
	// value of true after appended to the DOM (IE6/7)
	support.appendChecked = input.checked;

	fragment.removeChild( input );
	fragment.appendChild( div );

	// Technique from Juriy Zaytsev
	// http://perfectionkills.com/detecting-event-support-without-browser-sniffing/
	// We only care about the case where non-standard event systems
	// are used, namely in IE. Short-circuiting here helps us to
	// avoid an eval call (in setAttribute) which can cause CSP
	// to go haywire. See: https://developer.mozilla.org/en/Security/CSP
	if ( div.attachEvent ) {
		for ( i in {
			submit: true,
			change: true,
			focusin: true
		}) {
			eventName = "on" + i;
			isSupported = ( eventName in div );
			if ( !isSupported ) {
				div.setAttribute( eventName, "return;" );
				isSupported = ( typeof div[ eventName ] === "function" );
			}
			support[ i + "Bubbles" ] = isSupported;
		}
	}

	// Run tests that need a body at doc ready
	jQuery(function() {
		var container, div, tds, marginDiv,
			divReset = "padding:0;margin:0;border:0;display:block;overflow:hidden;",
			body = document.getElementsByTagName("body")[0];

		if ( !body ) {
			// Return for frameset docs that don't have a body
			return;
		}

		container = document.createElement("div");
		container.style.cssText = "visibility:hidden;border:0;width:0;height:0;position:static;top:0;margin-top:1px";
		body.insertBefore( container, body.firstChild );

		// Construct the test element
		div = document.createElement("div");
		container.appendChild( div );

		// Check if table cells still have offsetWidth/Height when they are set
		// to display:none and there are still other visible table cells in a
		// table row; if so, offsetWidth/Height are not reliable for use when
		// determining if an element has been hidden directly using
		// display:none (it is still safe to use offsets if a parent element is
		// hidden; don safety goggles and see bug #4512 for more information).
		// (only IE 8 fails this test)
		div.innerHTML = "<table><tr><td></td><td>t</td></tr></table>";
		tds = div.getElementsByTagName("td");
		tds[ 0 ].style.cssText = "padding:0;margin:0;border:0;display:none";
		isSupported = ( tds[ 0 ].offsetHeight === 0 );

		tds[ 0 ].style.display = "";
		tds[ 1 ].style.display = "none";

		// Check if empty table cells still have offsetWidth/Height
		// (IE <= 8 fail this test)
		support.reliableHiddenOffsets = isSupported && ( tds[ 0 ].offsetHeight === 0 );

		// Check box-sizing and margin behavior
		div.innerHTML = "";
		div.style.cssText = "box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;padding:1px;border:1px;display:block;width:4px;margin-top:1%;position:absolute;top:1%;";
		support.boxSizing = ( div.offsetWidth === 4 );
		support.doesNotIncludeMarginInBodyOffset = ( body.offsetTop !== 1 );

		// NOTE: To any future maintainer, window.getComputedStyle was used here
		// instead of getComputedStyle because it gave a better gzip size.
		// The difference between window.getComputedStyle and getComputedStyle is
		// 7 bytes
		if ( window.getComputedStyle ) {
			support.pixelPosition = ( window.getComputedStyle( div, null ) || {} ).top !== "1%";
			support.boxSizingReliable = ( window.getComputedStyle( div, null ) || { width: "4px" } ).width === "4px";

			// Check if div with explicit width and no margin-right incorrectly
			// gets computed margin-right based on width of container. For more
			// info see bug #3333
			// Fails in WebKit before Feb 2011 nightlies
			// WebKit Bug 13343 - getComputedStyle returns wrong value for margin-right
			marginDiv = document.createElement("div");
			marginDiv.style.cssText = div.style.cssText = divReset;
			marginDiv.style.marginRight = marginDiv.style.width = "0";
			div.style.width = "1px";
			div.appendChild( marginDiv );
			support.reliableMarginRight =
				!parseFloat( ( window.getComputedStyle( marginDiv, null ) || {} ).marginRight );
		}

		if ( typeof div.style.zoom !== "undefined" ) {
			// Check if natively block-level elements act like inline-block
			// elements when setting their display to 'inline' and giving
			// them layout
			// (IE < 8 does this)
			div.innerHTML = "";
			div.style.cssText = divReset + "width:1px;padding:1px;display:inline;zoom:1";
			support.inlineBlockNeedsLayout = ( div.offsetWidth === 3 );

			// Check if elements with layout shrink-wrap their children
			// (IE 6 does this)
			div.style.display = "block";
			div.style.overflow = "visible";
			div.innerHTML = "<div></div>";
			div.firstChild.style.width = "5px";
			support.shrinkWrapBlocks = ( div.offsetWidth !== 3 );

			container.style.zoom = 1;
		}

		// Null elements to avoid leaks in IE
		body.removeChild( container );
		container = div = tds = marginDiv = null;
	});

	// Null elements to avoid leaks in IE
	fragment.removeChild( div );
	all = a = select = opt = input = fragment = div = null;

	return support;
})();
var rbrace = /^(?:\{.*\}|\[.*\])$/,
	rmultiDash = /([A-Z])/g;

jQuery.extend({
	cache: {},

	deletedIds: [],

	// Please use with caution
	uuid: 0,

	// Unique for each copy of jQuery on the page
	// Non-digits removed to match rinlinejQuery
	expando: "jQuery" + ( jQuery.fn.jquery + Math.random() ).replace( /\D/g, "" ),

	// The following elements throw uncatchable exceptions if you
	// attempt to add expando properties to them.
	noData: {
		"embed": true,
		// Ban all objects except for Flash (which handle expandos)
		"object": "clsid:D27CDB6E-AE6D-11cf-96B8-444553540000",
		"applet": true
	},

	hasData: function( elem ) {
		elem = elem.nodeType ? jQuery.cache[ elem[jQuery.expando] ] : elem[ jQuery.expando ];
		return !!elem && !isEmptyDataObject( elem );
	},

	data: function( elem, name, data, pvt /* Internal Use Only */ ) {
		if ( !jQuery.acceptData( elem ) ) {
			return;
		}

		var thisCache, ret,
			internalKey = jQuery.expando,
			getByName = typeof name === "string",

			// We have to handle DOM nodes and JS objects differently because IE6-7
			// can't GC object references properly across the DOM-JS boundary
			isNode = elem.nodeType,

			// Only DOM nodes need the global jQuery cache; JS object data is
			// attached directly to the object so GC can occur automatically
			cache = isNode ? jQuery.cache : elem,

			// Only defining an ID for JS objects if its cache already exists allows
			// the code to shortcut on the same path as a DOM node with no cache
			id = isNode ? elem[ internalKey ] : elem[ internalKey ] && internalKey;

		// Avoid doing any more work than we need to when trying to get data on an
		// object that has no data at all
		if ( (!id || !cache[id] || (!pvt && !cache[id].data)) && getByName && data === undefined ) {
			return;
		}

		if ( !id ) {
			// Only DOM nodes need a new unique ID for each element since their data
			// ends up in the global cache
			if ( isNode ) {
				elem[ internalKey ] = id = jQuery.deletedIds.pop() || ++jQuery.uuid;
			} else {
				id = internalKey;
			}
		}

		if ( !cache[ id ] ) {
			cache[ id ] = {};

			// Avoids exposing jQuery metadata on plain JS objects when the object
			// is serialized using JSON.stringify
			if ( !isNode ) {
				cache[ id ].toJSON = jQuery.noop;
			}
		}

		// An object can be passed to jQuery.data instead of a key/value pair; this gets
		// shallow copied over onto the existing cache
		if ( typeof name === "object" || typeof name === "function" ) {
			if ( pvt ) {
				cache[ id ] = jQuery.extend( cache[ id ], name );
			} else {
				cache[ id ].data = jQuery.extend( cache[ id ].data, name );
			}
		}

		thisCache = cache[ id ];

		// jQuery data() is stored in a separate object inside the object's internal data
		// cache in order to avoid key collisions between internal data and user-defined
		// data.
		if ( !pvt ) {
			if ( !thisCache.data ) {
				thisCache.data = {};
			}

			thisCache = thisCache.data;
		}

		if ( data !== undefined ) {
			thisCache[ jQuery.camelCase( name ) ] = data;
		}

		// Check for both converted-to-camel and non-converted data property names
		// If a data property was specified
		if ( getByName ) {

			// First Try to find as-is property data
			ret = thisCache[ name ];

			// Test for null|undefined property data
			if ( ret == null ) {

				// Try to find the camelCased property
				ret = thisCache[ jQuery.camelCase( name ) ];
			}
		} else {
			ret = thisCache;
		}

		return ret;
	},

	removeData: function( elem, name, pvt /* Internal Use Only */ ) {
		if ( !jQuery.acceptData( elem ) ) {
			return;
		}

		var thisCache, i, l,

			isNode = elem.nodeType,

			// See jQuery.data for more information
			cache = isNode ? jQuery.cache : elem,
			id = isNode ? elem[ jQuery.expando ] : jQuery.expando;

		// If there is already no cache entry for this object, there is no
		// purpose in continuing
		if ( !cache[ id ] ) {
			return;
		}

		if ( name ) {

			thisCache = pvt ? cache[ id ] : cache[ id ].data;

			if ( thisCache ) {

				// Support array or space separated string names for data keys
				if ( !jQuery.isArray( name ) ) {

					// try the string as a key before any manipulation
					if ( name in thisCache ) {
						name = [ name ];
					} else {

						// split the camel cased version by spaces unless a key with the spaces exists
						name = jQuery.camelCase( name );
						if ( name in thisCache ) {
							name = [ name ];
						} else {
							name = name.split(" ");
						}
					}
				}

				for ( i = 0, l = name.length; i < l; i++ ) {
					delete thisCache[ name[i] ];
				}

				// If there is no data left in the cache, we want to continue
				// and let the cache object itself get destroyed
				if ( !( pvt ? isEmptyDataObject : jQuery.isEmptyObject )( thisCache ) ) {
					return;
				}
			}
		}

		// See jQuery.data for more information
		if ( !pvt ) {
			delete cache[ id ].data;

			// Don't destroy the parent cache unless the internal data object
			// had been the only thing left in it
			if ( !isEmptyDataObject( cache[ id ] ) ) {
				return;
			}
		}

		// Destroy the cache
		if ( isNode ) {
			jQuery.cleanData( [ elem ], true );

		// Use delete when supported for expandos or `cache` is not a window per isWindow (#10080)
		} else if ( jQuery.support.deleteExpando || cache != cache.window ) {
			delete cache[ id ];

		// When all else fails, null
		} else {
			cache[ id ] = null;
		}
	},

	// For internal use only.
	_data: function( elem, name, data ) {
		return jQuery.data( elem, name, data, true );
	},

	// A method for determining if a DOM node can handle the data expando
	acceptData: function( elem ) {
		var noData = elem.nodeName && jQuery.noData[ elem.nodeName.toLowerCase() ];

		// nodes accept data unless otherwise specified; rejection can be conditional
		return !noData || noData !== true && elem.getAttribute("classid") === noData;
	}
});

jQuery.fn.extend({
	data: function( key, value ) {
		var parts, part, attr, name, l,
			elem = this[0],
			i = 0,
			data = null;

		// Gets all values
		if ( key === undefined ) {
			if ( this.length ) {
				data = jQuery.data( elem );

				if ( elem.nodeType === 1 && !jQuery._data( elem, "parsedAttrs" ) ) {
					attr = elem.attributes;
					for ( l = attr.length; i < l; i++ ) {
						name = attr[i].name;

						if ( name.indexOf( "data-" ) === 0 ) {
							name = jQuery.camelCase( name.substring(5) );

							dataAttr( elem, name, data[ name ] );
						}
					}
					jQuery._data( elem, "parsedAttrs", true );
				}
			}

			return data;
		}

		// Sets multiple values
		if ( typeof key === "object" ) {
			return this.each(function() {
				jQuery.data( this, key );
			});
		}

		parts = key.split( ".", 2 );
		parts[1] = parts[1] ? "." + parts[1] : "";
		part = parts[1] + "!";

		return jQuery.access( this, function( value ) {

			if ( value === undefined ) {
				data = this.triggerHandler( "getData" + part, [ parts[0] ] );

				// Try to fetch any internally stored data first
				if ( data === undefined && elem ) {
					data = jQuery.data( elem, key );
					data = dataAttr( elem, key, data );
				}

				return data === undefined && parts[1] ?
					this.data( parts[0] ) :
					data;
			}

			parts[1] = value;
			this.each(function() {
				var self = jQuery( this );

				self.triggerHandler( "setData" + part, parts );
				jQuery.data( this, key, value );
				self.triggerHandler( "changeData" + part, parts );
			});
		}, null, value, arguments.length > 1, null, false );
	},

	removeData: function( key ) {
		return this.each(function() {
			jQuery.removeData( this, key );
		});
	}
});

function dataAttr( elem, key, data ) {
	// If nothing was found internally, try to fetch any
	// data from the HTML5 data-* attribute
	if ( data === undefined && elem.nodeType === 1 ) {

		var name = "data-" + key.replace( rmultiDash, "-$1" ).toLowerCase();

		data = elem.getAttribute( name );

		if ( typeof data === "string" ) {
			try {
				data = data === "true" ? true :
				data === "false" ? false :
				data === "null" ? null :
				// Only convert to a number if it doesn't change the string
				+data + "" === data ? +data :
				rbrace.test( data ) ? jQuery.parseJSON( data ) :
					data;
			} catch( e ) {}

			// Make sure we set the data so it isn't changed later
			jQuery.data( elem, key, data );

		} else {
			data = undefined;
		}
	}

	return data;
}

// checks a cache object for emptiness
function isEmptyDataObject( obj ) {
	var name;
	for ( name in obj ) {

		// if the public data object is empty, the private is still empty
		if ( name === "data" && jQuery.isEmptyObject( obj[name] ) ) {
			continue;
		}
		if ( name !== "toJSON" ) {
			return false;
		}
	}

	return true;
}
jQuery.extend({
	queue: function( elem, type, data ) {
		var queue;

		if ( elem ) {
			type = ( type || "fx" ) + "queue";
			queue = jQuery._data( elem, type );

			// Speed up dequeue by getting out quickly if this is just a lookup
			if ( data ) {
				if ( !queue || jQuery.isArray(data) ) {
					queue = jQuery._data( elem, type, jQuery.makeArray(data) );
				} else {
					queue.push( data );
				}
			}
			return queue || [];
		}
	},

	dequeue: function( elem, type ) {
		type = type || "fx";

		var queue = jQuery.queue( elem, type ),
			fn = queue.shift(),
			hooks = jQuery._queueHooks( elem, type ),
			next = function() {
				jQuery.dequeue( elem, type );
			};

		// If the fx queue is dequeued, always remove the progress sentinel
		if ( fn === "inprogress" ) {
			fn = queue.shift();
		}

		if ( fn ) {

			// Add a progress sentinel to prevent the fx queue from being
			// automatically dequeued
			if ( type === "fx" ) {
				queue.unshift( "inprogress" );
			}

			// clear up the last queue stop function
			delete hooks.stop;
			fn.call( elem, next, hooks );
		}
		if ( !queue.length && hooks ) {
			hooks.empty.fire();
		}
	},

	// not intended for public consumption - generates a queueHooks object, or returns the current one
	_queueHooks: function( elem, type ) {
		var key = type + "queueHooks";
		return jQuery._data( elem, key ) || jQuery._data( elem, key, {
			empty: jQuery.Callbacks("once memory").add(function() {
				jQuery.removeData( elem, type + "queue", true );
				jQuery.removeData( elem, key, true );
			})
		});
	}
});

jQuery.fn.extend({
	queue: function( type, data ) {
		var setter = 2;

		if ( typeof type !== "string" ) {
			data = type;
			type = "fx";
			setter--;
		}

		if ( arguments.length < setter ) {
			return jQuery.queue( this[0], type );
		}

		return data === undefined ?
			this :
			this.each(function() {
				var queue = jQuery.queue( this, type, data );

				// ensure a hooks for this queue
				jQuery._queueHooks( this, type );

				if ( type === "fx" && queue[0] !== "inprogress" ) {
					jQuery.dequeue( this, type );
				}
			});
	},
	dequeue: function( type ) {
		return this.each(function() {
			jQuery.dequeue( this, type );
		});
	},
	// Based off of the plugin by Clint Helfers, with permission.
	// http://blindsignals.com/index.php/2009/07/jquery-delay/
	delay: function( time, type ) {
		time = jQuery.fx ? jQuery.fx.speeds[ time ] || time : time;
		type = type || "fx";

		return this.queue( type, function( next, hooks ) {
			var timeout = setTimeout( next, time );
			hooks.stop = function() {
				clearTimeout( timeout );
			};
		});
	},
	clearQueue: function( type ) {
		return this.queue( type || "fx", [] );
	},
	// Get a promise resolved when queues of a certain type
	// are emptied (fx is the type by default)
	promise: function( type, obj ) {
		var tmp,
			count = 1,
			defer = jQuery.Deferred(),
			elements = this,
			i = this.length,
			resolve = function() {
				if ( !( --count ) ) {
					defer.resolveWith( elements, [ elements ] );
				}
			};

		if ( typeof type !== "string" ) {
			obj = type;
			type = undefined;
		}
		type = type || "fx";

		while( i-- ) {
			if ( (tmp = jQuery._data( elements[ i ], type + "queueHooks" )) && tmp.empty ) {
				count++;
				tmp.empty.add( resolve );
			}
		}
		resolve();
		return defer.promise( obj );
	}
});
var nodeHook, boolHook, fixSpecified,
	rclass = /[\t\r\n]/g,
	rreturn = /\r/g,
	rtype = /^(?:button|input)$/i,
	rfocusable = /^(?:button|input|object|select|textarea)$/i,
	rclickable = /^a(?:rea|)$/i,
	rboolean = /^(?:autofocus|autoplay|async|checked|controls|defer|disabled|hidden|loop|multiple|open|readonly|required|scoped|selected)$/i,
	getSetAttribute = jQuery.support.getSetAttribute;

jQuery.fn.extend({
	attr: function( name, value ) {
		return jQuery.access( this, jQuery.attr, name, value, arguments.length > 1 );
	},

	removeAttr: function( name ) {
		return this.each(function() {
			jQuery.removeAttr( this, name );
		});
	},

	prop: function( name, value ) {
		return jQuery.access( this, jQuery.prop, name, value, arguments.length > 1 );
	},

	removeProp: function( name ) {
		name = jQuery.propFix[ name ] || name;
		return this.each(function() {
			// try/catch handles cases where IE balks (such as removing a property on window)
			try {
				this[ name ] = undefined;
				delete this[ name ];
			} catch( e ) {}
		});
	},

	addClass: function( value ) {
		var classNames, i, l, elem,
			setClass, c, cl;

		if ( jQuery.isFunction( value ) ) {
			return this.each(function( j ) {
				jQuery( this ).addClass( value.call(this, j, this.className) );
			});
		}

		if ( value && typeof value === "string" ) {
			classNames = value.split( core_rspace );

			for ( i = 0, l = this.length; i < l; i++ ) {
				elem = this[ i ];

				if ( elem.nodeType === 1 ) {
					if ( !elem.className && classNames.length === 1 ) {
						elem.className = value;

					} else {
						setClass = " " + elem.className + " ";

						for ( c = 0, cl = classNames.length; c < cl; c++ ) {
							if ( !~setClass.indexOf( " " + classNames[ c ] + " " ) ) {
								setClass += classNames[ c ] + " ";
							}
						}
						elem.className = jQuery.trim( setClass );
					}
				}
			}
		}

		return this;
	},

	removeClass: function( value ) {
		var removes, className, elem, c, cl, i, l;

		if ( jQuery.isFunction( value ) ) {
			return this.each(function( j ) {
				jQuery( this ).removeClass( value.call(this, j, this.className) );
			});
		}
		if ( (value && typeof value === "string") || value === undefined ) {
			removes = ( value || "" ).split( core_rspace );

			for ( i = 0, l = this.length; i < l; i++ ) {
				elem = this[ i ];
				if ( elem.nodeType === 1 && elem.className ) {

					className = (" " + elem.className + " ").replace( rclass, " " );

					// loop over each item in the removal list
					for ( c = 0, cl = removes.length; c < cl; c++ ) {
						// Remove until there is nothing to remove,
						while ( className.indexOf(" " + removes[ c ] + " ") > -1 ) {
							className = className.replace( " " + removes[ c ] + " " , " " );
						}
					}
					elem.className = value ? jQuery.trim( className ) : "";
				}
			}
		}

		return this;
	},

	toggleClass: function( value, stateVal ) {
		var type = typeof value,
			isBool = typeof stateVal === "boolean";

		if ( jQuery.isFunction( value ) ) {
			return this.each(function( i ) {
				jQuery( this ).toggleClass( value.call(this, i, this.className, stateVal), stateVal );
			});
		}

		return this.each(function() {
			if ( type === "string" ) {
				// toggle individual class names
				var className,
					i = 0,
					self = jQuery( this ),
					state = stateVal,
					classNames = value.split( core_rspace );

				while ( (className = classNames[ i++ ]) ) {
					// check each className given, space separated list
					state = isBool ? state : !self.hasClass( className );
					self[ state ? "addClass" : "removeClass" ]( className );
				}

			} else if ( type === "undefined" || type === "boolean" ) {
				if ( this.className ) {
					// store className if set
					jQuery._data( this, "__className__", this.className );
				}

				// toggle whole className
				this.className = this.className || value === false ? "" : jQuery._data( this, "__className__" ) || "";
			}
		});
	},

	hasClass: function( selector ) {
		var className = " " + selector + " ",
			i = 0,
			l = this.length;
		for ( ; i < l; i++ ) {
			if ( this[i].nodeType === 1 && (" " + this[i].className + " ").replace(rclass, " ").indexOf( className ) > -1 ) {
				return true;
			}
		}

		return false;
	},

	val: function( value ) {
		var hooks, ret, isFunction,
			elem = this[0];

		if ( !arguments.length ) {
			if ( elem ) {
				hooks = jQuery.valHooks[ elem.type ] || jQuery.valHooks[ elem.nodeName.toLowerCase() ];

				if ( hooks && "get" in hooks && (ret = hooks.get( elem, "value" )) !== undefined ) {
					return ret;
				}

				ret = elem.value;

				return typeof ret === "string" ?
					// handle most common string cases
					ret.replace(rreturn, "") :
					// handle cases where value is null/undef or number
					ret == null ? "" : ret;
			}

			return;
		}

		isFunction = jQuery.isFunction( value );

		return this.each(function( i ) {
			var val,
				self = jQuery(this);

			if ( this.nodeType !== 1 ) {
				return;
			}

			if ( isFunction ) {
				val = value.call( this, i, self.val() );
			} else {
				val = value;
			}

			// Treat null/undefined as ""; convert numbers to string
			if ( val == null ) {
				val = "";
			} else if ( typeof val === "number" ) {
				val += "";
			} else if ( jQuery.isArray( val ) ) {
				val = jQuery.map(val, function ( value ) {
					return value == null ? "" : value + "";
				});
			}

			hooks = jQuery.valHooks[ this.type ] || jQuery.valHooks[ this.nodeName.toLowerCase() ];

			// If set returns undefined, fall back to normal setting
			if ( !hooks || !("set" in hooks) || hooks.set( this, val, "value" ) === undefined ) {
				this.value = val;
			}
		});
	}
});

jQuery.extend({
	valHooks: {
		option: {
			get: function( elem ) {
				// attributes.value is undefined in Blackberry 4.7 but
				// uses .value. See #6932
				var val = elem.attributes.value;
				return !val || val.specified ? elem.value : elem.text;
			}
		},
		select: {
			get: function( elem ) {
				var value, i, max, option,
					index = elem.selectedIndex,
					values = [],
					options = elem.options,
					one = elem.type === "select-one";

				// Nothing was selected
				if ( index < 0 ) {
					return null;
				}

				// Loop through all the selected options
				i = one ? index : 0;
				max = one ? index + 1 : options.length;
				for ( ; i < max; i++ ) {
					option = options[ i ];

					// Don't return options that are disabled or in a disabled optgroup
					if ( option.selected && (jQuery.support.optDisabled ? !option.disabled : option.getAttribute("disabled") === null) &&
							(!option.parentNode.disabled || !jQuery.nodeName( option.parentNode, "optgroup" )) ) {

						// Get the specific value for the option
						value = jQuery( option ).val();

						// We don't need an array for one selects
						if ( one ) {
							return value;
						}

						// Multi-Selects return an array
						values.push( value );
					}
				}

				// Fixes Bug #2551 -- select.val() broken in IE after form.reset()
				if ( one && !values.length && options.length ) {
					return jQuery( options[ index ] ).val();
				}

				return values;
			},

			set: function( elem, value ) {
				var values = jQuery.makeArray( value );

				jQuery(elem).find("option").each(function() {
					this.selected = jQuery.inArray( jQuery(this).val(), values ) >= 0;
				});

				if ( !values.length ) {
					elem.selectedIndex = -1;
				}
				return values;
			}
		}
	},

	// Unused in 1.8, left in so attrFn-stabbers won't die; remove in 1.9
	attrFn: {},

	attr: function( elem, name, value, pass ) {
		var ret, hooks, notxml,
			nType = elem.nodeType;

		// don't get/set attributes on text, comment and attribute nodes
		if ( !elem || nType === 3 || nType === 8 || nType === 2 ) {
			return;
		}

		if ( pass && jQuery.isFunction( jQuery.fn[ name ] ) ) {
			return jQuery( elem )[ name ]( value );
		}

		// Fallback to prop when attributes are not supported
		if ( typeof elem.getAttribute === "undefined" ) {
			return jQuery.prop( elem, name, value );
		}

		notxml = nType !== 1 || !jQuery.isXMLDoc( elem );

		// All attributes are lowercase
		// Grab necessary hook if one is defined
		if ( notxml ) {
			name = name.toLowerCase();
			hooks = jQuery.attrHooks[ name ] || ( rboolean.test( name ) ? boolHook : nodeHook );
		}

		if ( value !== undefined ) {

			if ( value === null ) {
				jQuery.removeAttr( elem, name );
				return;

			} else if ( hooks && "set" in hooks && notxml && (ret = hooks.set( elem, value, name )) !== undefined ) {
				return ret;

			} else {
				elem.setAttribute( name, "" + value );
				return value;
			}

		} else if ( hooks && "get" in hooks && notxml && (ret = hooks.get( elem, name )) !== null ) {
			return ret;

		} else {

			ret = elem.getAttribute( name );

			// Non-existent attributes return null, we normalize to undefined
			return ret === null ?
				undefined :
				ret;
		}
	},

	removeAttr: function( elem, value ) {
		var propName, attrNames, name, isBool,
			i = 0;

		if ( value && elem.nodeType === 1 ) {

			attrNames = value.split( core_rspace );

			for ( ; i < attrNames.length; i++ ) {
				name = attrNames[ i ];

				if ( name ) {
					propName = jQuery.propFix[ name ] || name;
					isBool = rboolean.test( name );

					// See #9699 for explanation of this approach (setting first, then removal)
					// Do not do this for boolean attributes (see #10870)
					if ( !isBool ) {
						jQuery.attr( elem, name, "" );
					}
					elem.removeAttribute( getSetAttribute ? name : propName );

					// Set corresponding property to false for boolean attributes
					if ( isBool && propName in elem ) {
						elem[ propName ] = false;
					}
				}
			}
		}
	},

	attrHooks: {
		type: {
			set: function( elem, value ) {
				// We can't allow the type property to be changed (since it causes problems in IE)
				if ( rtype.test( elem.nodeName ) && elem.parentNode ) {
					jQuery.error( "type property can't be changed" );
				} else if ( !jQuery.support.radioValue && value === "radio" && jQuery.nodeName(elem, "input") ) {
					// Setting the type on a radio button after the value resets the value in IE6-9
					// Reset value to it's default in case type is set after value
					// This is for element creation
					var val = elem.value;
					elem.setAttribute( "type", value );
					if ( val ) {
						elem.value = val;
					}
					return value;
				}
			}
		},
		// Use the value property for back compat
		// Use the nodeHook for button elements in IE6/7 (#1954)
		value: {
			get: function( elem, name ) {
				if ( nodeHook && jQuery.nodeName( elem, "button" ) ) {
					return nodeHook.get( elem, name );
				}
				return name in elem ?
					elem.value :
					null;
			},
			set: function( elem, value, name ) {
				if ( nodeHook && jQuery.nodeName( elem, "button" ) ) {
					return nodeHook.set( elem, value, name );
				}
				// Does not return so that setAttribute is also used
				elem.value = value;
			}
		}
	},

	propFix: {
		tabindex: "tabIndex",
		readonly: "readOnly",
		"for": "htmlFor",
		"class": "className",
		maxlength: "maxLength",
		cellspacing: "cellSpacing",
		cellpadding: "cellPadding",
		rowspan: "rowSpan",
		colspan: "colSpan",
		usemap: "useMap",
		frameborder: "frameBorder",
		contenteditable: "contentEditable"
	},

	prop: function( elem, name, value ) {
		var ret, hooks, notxml,
			nType = elem.nodeType;

		// don't get/set properties on text, comment and attribute nodes
		if ( !elem || nType === 3 || nType === 8 || nType === 2 ) {
			return;
		}

		notxml = nType !== 1 || !jQuery.isXMLDoc( elem );

		if ( notxml ) {
			// Fix name and attach hooks
			name = jQuery.propFix[ name ] || name;
			hooks = jQuery.propHooks[ name ];
		}

		if ( value !== undefined ) {
			if ( hooks && "set" in hooks && (ret = hooks.set( elem, value, name )) !== undefined ) {
				return ret;

			} else {
				return ( elem[ name ] = value );
			}

		} else {
			if ( hooks && "get" in hooks && (ret = hooks.get( elem, name )) !== null ) {
				return ret;

			} else {
				return elem[ name ];
			}
		}
	},

	propHooks: {
		tabIndex: {
			get: function( elem ) {
				// elem.tabIndex doesn't always return the correct value when it hasn't been explicitly set
				// http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/
				var attributeNode = elem.getAttributeNode("tabindex");

				return attributeNode && attributeNode.specified ?
					parseInt( attributeNode.value, 10 ) :
					rfocusable.test( elem.nodeName ) || rclickable.test( elem.nodeName ) && elem.href ?
						0 :
						undefined;
			}
		}
	}
});

// Hook for boolean attributes
boolHook = {
	get: function( elem, name ) {
		// Align boolean attributes with corresponding properties
		// Fall back to attribute presence where some booleans are not supported
		var attrNode,
			property = jQuery.prop( elem, name );
		return property === true || typeof property !== "boolean" && ( attrNode = elem.getAttributeNode(name) ) && attrNode.nodeValue !== false ?
			name.toLowerCase() :
			undefined;
	},
	set: function( elem, value, name ) {
		var propName;
		if ( value === false ) {
			// Remove boolean attributes when set to false
			jQuery.removeAttr( elem, name );
		} else {
			// value is true since we know at this point it's type boolean and not false
			// Set boolean attributes to the same name and set the DOM property
			propName = jQuery.propFix[ name ] || name;
			if ( propName in elem ) {
				// Only set the IDL specifically if it already exists on the element
				elem[ propName ] = true;
			}

			elem.setAttribute( name, name.toLowerCase() );
		}
		return name;
	}
};

// IE6/7 do not support getting/setting some attributes with get/setAttribute
if ( !getSetAttribute ) {

	fixSpecified = {
		name: true,
		id: true,
		coords: true
	};

	// Use this for any attribute in IE6/7
	// This fixes almost every IE6/7 issue
	nodeHook = jQuery.valHooks.button = {
		get: function( elem, name ) {
			var ret;
			ret = elem.getAttributeNode( name );
			return ret && ( fixSpecified[ name ] ? ret.value !== "" : ret.specified ) ?
				ret.value :
				undefined;
		},
		set: function( elem, value, name ) {
			// Set the existing or create a new attribute node
			var ret = elem.getAttributeNode( name );
			if ( !ret ) {
				ret = document.createAttribute( name );
				elem.setAttributeNode( ret );
			}
			return ( ret.value = value + "" );
		}
	};

	// Set width and height to auto instead of 0 on empty string( Bug #8150 )
	// This is for removals
	jQuery.each([ "width", "height" ], function( i, name ) {
		jQuery.attrHooks[ name ] = jQuery.extend( jQuery.attrHooks[ name ], {
			set: function( elem, value ) {
				if ( value === "" ) {
					elem.setAttribute( name, "auto" );
					return value;
				}
			}
		});
	});

	// Set contenteditable to false on removals(#10429)
	// Setting to empty string throws an error as an invalid value
	jQuery.attrHooks.contenteditable = {
		get: nodeHook.get,
		set: function( elem, value, name ) {
			if ( value === "" ) {
				value = "false";
			}
			nodeHook.set( elem, value, name );
		}
	};
}


// Some attributes require a special call on IE
if ( !jQuery.support.hrefNormalized ) {
	jQuery.each([ "href", "src", "width", "height" ], function( i, name ) {
		jQuery.attrHooks[ name ] = jQuery.extend( jQuery.attrHooks[ name ], {
			get: function( elem ) {
				var ret = elem.getAttribute( name, 2 );
				return ret === null ? undefined : ret;
			}
		});
	});
}

if ( !jQuery.support.style ) {
	jQuery.attrHooks.style = {
		get: function( elem ) {
			// Return undefined in the case of empty string
			// Normalize to lowercase since IE uppercases css property names
			return elem.style.cssText.toLowerCase() || undefined;
		},
		set: function( elem, value ) {
			return ( elem.style.cssText = "" + value );
		}
	};
}

// Safari mis-reports the default selected property of an option
// Accessing the parent's selectedIndex property fixes it
if ( !jQuery.support.optSelected ) {
	jQuery.propHooks.selected = jQuery.extend( jQuery.propHooks.selected, {
		get: function( elem ) {
			var parent = elem.parentNode;

			if ( parent ) {
				parent.selectedIndex;

				// Make sure that it also works with optgroups, see #5701
				if ( parent.parentNode ) {
					parent.parentNode.selectedIndex;
				}
			}
			return null;
		}
	});
}

// IE6/7 call enctype encoding
if ( !jQuery.support.enctype ) {
	jQuery.propFix.enctype = "encoding";
}

// Radios and checkboxes getter/setter
if ( !jQuery.support.checkOn ) {
	jQuery.each([ "radio", "checkbox" ], function() {
		jQuery.valHooks[ this ] = {
			get: function( elem ) {
				// Handle the case where in Webkit "" is returned instead of "on" if a value isn't specified
				return elem.getAttribute("value") === null ? "on" : elem.value;
			}
		};
	});
}
jQuery.each([ "radio", "checkbox" ], function() {
	jQuery.valHooks[ this ] = jQuery.extend( jQuery.valHooks[ this ], {
		set: function( elem, value ) {
			if ( jQuery.isArray( value ) ) {
				return ( elem.checked = jQuery.inArray( jQuery(elem).val(), value ) >= 0 );
			}
		}
	});
});
var rformElems = /^(?:textarea|input|select)$/i,
	rtypenamespace = /^([^\.]*|)(?:\.(.+)|)$/,
	rhoverHack = /(?:^|\s)hover(\.\S+|)\b/,
	rkeyEvent = /^key/,
	rmouseEvent = /^(?:mouse|contextmenu)|click/,
	rfocusMorph = /^(?:focusinfocus|focusoutblur)$/,
	hoverHack = function( events ) {
		return jQuery.event.special.hover ? events : events.replace( rhoverHack, "mouseenter$1 mouseleave$1" );
	};

/*
 * Helper functions for managing events -- not part of the public interface.
 * Props to Dean Edwards' addEvent library for many of the ideas.
 */
jQuery.event = {

	add: function( elem, types, handler, data, selector ) {

		var elemData, eventHandle, events,
			t, tns, type, namespaces, handleObj,
			handleObjIn, handlers, special;

		// Don't attach events to noData or text/comment nodes (allow plain objects tho)
		if ( elem.nodeType === 3 || elem.nodeType === 8 || !types || !handler || !(elemData = jQuery._data( elem )) ) {
			return;
		}

		// Caller can pass in an object of custom data in lieu of the handler
		if ( handler.handler ) {
			handleObjIn = handler;
			handler = handleObjIn.handler;
			selector = handleObjIn.selector;
		}

		// Make sure that the handler has a unique ID, used to find/remove it later
		if ( !handler.guid ) {
			handler.guid = jQuery.guid++;
		}

		// Init the element's event structure and main handler, if this is the first
		events = elemData.events;
		if ( !events ) {
			elemData.events = events = {};
		}
		eventHandle = elemData.handle;
		if ( !eventHandle ) {
			elemData.handle = eventHandle = function( e ) {
				// Discard the second event of a jQuery.event.trigger() and
				// when an event is called after a page has unloaded
				return typeof jQuery !== "undefined" && (!e || jQuery.event.triggered !== e.type) ?
					jQuery.event.dispatch.apply( eventHandle.elem, arguments ) :
					undefined;
			};
			// Add elem as a property of the handle fn to prevent a memory leak with IE non-native events
			eventHandle.elem = elem;
		}

		// Handle multiple events separated by a space
		// jQuery(...).bind("mouseover mouseout", fn);
		types = jQuery.trim( hoverHack(types) ).split( " " );
		for ( t = 0; t < types.length; t++ ) {

			tns = rtypenamespace.exec( types[t] ) || [];
			type = tns[1];
			namespaces = ( tns[2] || "" ).split( "." ).sort();

			// If event changes its type, use the special event handlers for the changed type
			special = jQuery.event.special[ type ] || {};

			// If selector defined, determine special event api type, otherwise given type
			type = ( selector ? special.delegateType : special.bindType ) || type;

			// Update special based on newly reset type
			special = jQuery.event.special[ type ] || {};

			// handleObj is passed to all event handlers
			handleObj = jQuery.extend({
				type: type,
				origType: tns[1],
				data: data,
				handler: handler,
				guid: handler.guid,
				selector: selector,
				namespace: namespaces.join(".")
			}, handleObjIn );

			// Init the event handler queue if we're the first
			handlers = events[ type ];
			if ( !handlers ) {
				handlers = events[ type ] = [];
				handlers.delegateCount = 0;

				// Only use addEventListener/attachEvent if the special events handler returns false
				if ( !special.setup || special.setup.call( elem, data, namespaces, eventHandle ) === false ) {
					// Bind the global event handler to the element
					if ( elem.addEventListener ) {
						elem.addEventListener( type, eventHandle, false );

					} else if ( elem.attachEvent ) {
						elem.attachEvent( "on" + type, eventHandle );
					}
				}
			}

			if ( special.add ) {
				special.add.call( elem, handleObj );

				if ( !handleObj.handler.guid ) {
					handleObj.handler.guid = handler.guid;
				}
			}

			// Add to the element's handler list, delegates in front
			if ( selector ) {
				handlers.splice( handlers.delegateCount++, 0, handleObj );
			} else {
				handlers.push( handleObj );
			}

			// Keep track of which events have ever been used, for event optimization
			jQuery.event.global[ type ] = true;
		}

		// Nullify elem to prevent memory leaks in IE
		elem = null;
	},

	global: {},

	// Detach an event or set of events from an element
	remove: function( elem, types, handler, selector, mappedTypes ) {

		var t, tns, type, origType, namespaces, origCount,
			j, events, special, eventType, handleObj,
			elemData = jQuery.hasData( elem ) && jQuery._data( elem );

		if ( !elemData || !(events = elemData.events) ) {
			return;
		}

		// Once for each type.namespace in types; type may be omitted
		types = jQuery.trim( hoverHack( types || "" ) ).split(" ");
		for ( t = 0; t < types.length; t++ ) {
			tns = rtypenamespace.exec( types[t] ) || [];
			type = origType = tns[1];
			namespaces = tns[2];

			// Unbind all events (on this namespace, if provided) for the element
			if ( !type ) {
				for ( type in events ) {
					jQuery.event.remove( elem, type + types[ t ], handler, selector, true );
				}
				continue;
			}

			special = jQuery.event.special[ type ] || {};
			type = ( selector? special.delegateType : special.bindType ) || type;
			eventType = events[ type ] || [];
			origCount = eventType.length;
			namespaces = namespaces ? new RegExp("(^|\\.)" + namespaces.split(".").sort().join("\\.(?:.*\\.|)") + "(\\.|$)") : null;

			// Remove matching events
			for ( j = 0; j < eventType.length; j++ ) {
				handleObj = eventType[ j ];

				if ( ( mappedTypes || origType === handleObj.origType ) &&
					 ( !handler || handler.guid === handleObj.guid ) &&
					 ( !namespaces || namespaces.test( handleObj.namespace ) ) &&
					 ( !selector || selector === handleObj.selector || selector === "**" && handleObj.selector ) ) {
					eventType.splice( j--, 1 );

					if ( handleObj.selector ) {
						eventType.delegateCount--;
					}
					if ( special.remove ) {
						special.remove.call( elem, handleObj );
					}
				}
			}

			// Remove generic event handler if we removed something and no more handlers exist
			// (avoids potential for endless recursion during removal of special event handlers)
			if ( eventType.length === 0 && origCount !== eventType.length ) {
				if ( !special.teardown || special.teardown.call( elem, namespaces, elemData.handle ) === false ) {
					jQuery.removeEvent( elem, type, elemData.handle );
				}

				delete events[ type ];
			}
		}

		// Remove the expando if it's no longer used
		if ( jQuery.isEmptyObject( events ) ) {
			delete elemData.handle;

			// removeData also checks for emptiness and clears the expando if empty
			// so use it instead of delete
			jQuery.removeData( elem, "events", true );
		}
	},

	// Events that are safe to short-circuit if no handlers are attached.
	// Native DOM events should not be added, they may have inline handlers.
	customEvent: {
		"getData": true,
		"setData": true,
		"changeData": true
	},

	trigger: function( event, data, elem, onlyHandlers ) {
		// Don't do events on text and comment nodes
		if ( elem && (elem.nodeType === 3 || elem.nodeType === 8) ) {
			return;
		}

		// Event object or event type
		var cache, exclusive, i, cur, old, ontype, special, handle, eventPath, bubbleType,
			type = event.type || event,
			namespaces = [];

		// focus/blur morphs to focusin/out; ensure we're not firing them right now
		if ( rfocusMorph.test( type + jQuery.event.triggered ) ) {
			return;
		}

		if ( type.indexOf( "!" ) >= 0 ) {
			// Exclusive events trigger only for the exact event (no namespaces)
			type = type.slice(0, -1);
			exclusive = true;
		}

		if ( type.indexOf( "." ) >= 0 ) {
			// Namespaced trigger; create a regexp to match event type in handle()
			namespaces = type.split(".");
			type = namespaces.shift();
			namespaces.sort();
		}

		if ( (!elem || jQuery.event.customEvent[ type ]) && !jQuery.event.global[ type ] ) {
			// No jQuery handlers for this event type, and it can't have inline handlers
			return;
		}

		// Caller can pass in an Event, Object, or just an event type string
		event = typeof event === "object" ?
			// jQuery.Event object
			event[ jQuery.expando ] ? event :
			// Object literal
			new jQuery.Event( type, event ) :
			// Just the event type (string)
			new jQuery.Event( type );

		event.type = type;
		event.isTrigger = true;
		event.exclusive = exclusive;
		event.namespace = namespaces.join( "." );
		event.namespace_re = event.namespace? new RegExp("(^|\\.)" + namespaces.join("\\.(?:.*\\.|)") + "(\\.|$)") : null;
		ontype = type.indexOf( ":" ) < 0 ? "on" + type : "";

		// Handle a global trigger
		if ( !elem ) {

			// TODO: Stop taunting the data cache; remove global events and always attach to document
			cache = jQuery.cache;
			for ( i in cache ) {
				if ( cache[ i ].events && cache[ i ].events[ type ] ) {
					jQuery.event.trigger( event, data, cache[ i ].handle.elem, true );
				}
			}
			return;
		}

		// Clean up the event in case it is being reused
		event.result = undefined;
		if ( !event.target ) {
			event.target = elem;
		}

		// Clone any incoming data and prepend the event, creating the handler arg list
		data = data != null ? jQuery.makeArray( data ) : [];
		data.unshift( event );

		// Allow special events to draw outside the lines
		special = jQuery.event.special[ type ] || {};
		if ( special.trigger && special.trigger.apply( elem, data ) === false ) {
			return;
		}

		// Determine event propagation path in advance, per W3C events spec (#9951)
		// Bubble up to document, then to window; watch for a global ownerDocument var (#9724)
		eventPath = [[ elem, special.bindType || type ]];
		if ( !onlyHandlers && !special.noBubble && !jQuery.isWindow( elem ) ) {

			bubbleType = special.delegateType || type;
			cur = rfocusMorph.test( bubbleType + type ) ? elem : elem.parentNode;
			for ( old = elem; cur; cur = cur.parentNode ) {
				eventPath.push([ cur, bubbleType ]);
				old = cur;
			}

			// Only add window if we got to document (e.g., not plain obj or detached DOM)
			if ( old === (elem.ownerDocument || document) ) {
				eventPath.push([ old.defaultView || old.parentWindow || window, bubbleType ]);
			}
		}

		// Fire handlers on the event path
		for ( i = 0; i < eventPath.length && !event.isPropagationStopped(); i++ ) {

			cur = eventPath[i][0];
			event.type = eventPath[i][1];

			handle = ( jQuery._data( cur, "events" ) || {} )[ event.type ] && jQuery._data( cur, "handle" );
			if ( handle ) {
				handle.apply( cur, data );
			}
			// Note that this is a bare JS function and not a jQuery handler
			handle = ontype && cur[ ontype ];
			if ( handle && jQuery.acceptData( cur ) && handle.apply( cur, data ) === false ) {
				event.preventDefault();
			}
		}
		event.type = type;

		// If nobody prevented the default action, do it now
		if ( !onlyHandlers && !event.isDefaultPrevented() ) {

			if ( (!special._default || special._default.apply( elem.ownerDocument, data ) === false) &&
				!(type === "click" && jQuery.nodeName( elem, "a" )) && jQuery.acceptData( elem ) ) {

				// Call a native DOM method on the target with the same name name as the event.
				// Can't use an .isFunction() check here because IE6/7 fails that test.
				// Don't do default actions on window, that's where global variables be (#6170)
				// IE<9 dies on focus/blur to hidden element (#1486)
				if ( ontype && elem[ type ] && ((type !== "focus" && type !== "blur") || event.target.offsetWidth !== 0) && !jQuery.isWindow( elem ) ) {

					// Don't re-trigger an onFOO event when we call its FOO() method
					old = elem[ ontype ];

					if ( old ) {
						elem[ ontype ] = null;
					}

					// Prevent re-triggering of the same event, since we already bubbled it above
					jQuery.event.triggered = type;
					elem[ type ]();
					jQuery.event.triggered = undefined;

					if ( old ) {
						elem[ ontype ] = old;
					}
				}
			}
		}

		return event.result;
	},

	dispatch: function( event ) {

		// Make a writable jQuery.Event from the native event object
		event = jQuery.event.fix( event || window.event );

		var i, j, cur, jqcur, ret, selMatch, matched, matches, handleObj, sel, related,
			handlers = ( (jQuery._data( this, "events" ) || {} )[ event.type ] || []),
			delegateCount = handlers.delegateCount,
			args = [].slice.call( arguments ),
			run_all = !event.exclusive && !event.namespace,
			special = jQuery.event.special[ event.type ] || {},
			handlerQueue = [];

		// Use the fix-ed jQuery.Event rather than the (read-only) native event
		args[0] = event;
		event.delegateTarget = this;

		// Call the preDispatch hook for the mapped type, and let it bail if desired
		if ( special.preDispatch && special.preDispatch.call( this, event ) === false ) {
			return;
		}

		// Determine handlers that should run if there are delegated events
		// Avoid non-left-click bubbling in Firefox (#3861)
		if ( delegateCount && !(event.button && event.type === "click") ) {

			// Pregenerate a single jQuery object for reuse with .is()
			jqcur = jQuery(this);
			jqcur.context = this;

			for ( cur = event.target; cur != this; cur = cur.parentNode || this ) {

				// Don't process clicks (ONLY) on disabled elements (#6911, #8165, #xxxx)
				if ( cur.disabled !== true || event.type !== "click" ) {
					selMatch = {};
					matches = [];
					jqcur[0] = cur;
					for ( i = 0; i < delegateCount; i++ ) {
						handleObj = handlers[ i ];
						sel = handleObj.selector;

						if ( selMatch[ sel ] === undefined ) {
							selMatch[ sel ] = jqcur.is( sel );
						}
						if ( selMatch[ sel ] ) {
							matches.push( handleObj );
						}
					}
					if ( matches.length ) {
						handlerQueue.push({ elem: cur, matches: matches });
					}
				}
			}
		}

		// Add the remaining (directly-bound) handlers
		if ( handlers.length > delegateCount ) {
			handlerQueue.push({ elem: this, matches: handlers.slice( delegateCount ) });
		}

		// Run delegates first; they may want to stop propagation beneath us
		for ( i = 0; i < handlerQueue.length && !event.isPropagationStopped(); i++ ) {
			matched = handlerQueue[ i ];
			event.currentTarget = matched.elem;

			for ( j = 0; j < matched.matches.length && !event.isImmediatePropagationStopped(); j++ ) {
				handleObj = matched.matches[ j ];

				// Triggered event must either 1) be non-exclusive and have no namespace, or
				// 2) have namespace(s) a subset or equal to those in the bound event (both can have no namespace).
				if ( run_all || (!event.namespace && !handleObj.namespace) || event.namespace_re && event.namespace_re.test( handleObj.namespace ) ) {

					event.data = handleObj.data;
					event.handleObj = handleObj;

					ret = ( (jQuery.event.special[ handleObj.origType ] || {}).handle || handleObj.handler )
							.apply( matched.elem, args );

					if ( ret !== undefined ) {
						event.result = ret;
						if ( ret === false ) {
							event.preventDefault();
							event.stopPropagation();
						}
					}
				}
			}
		}

		// Call the postDispatch hook for the mapped type
		if ( special.postDispatch ) {
			special.postDispatch.call( this, event );
		}

		return event.result;
	},

	// Includes some event props shared by KeyEvent and MouseEvent
	// *** attrChange attrName relatedNode srcElement  are not normalized, non-W3C, deprecated, will be removed in 1.8 ***
	props: "attrChange attrName relatedNode srcElement altKey bubbles cancelable ctrlKey currentTarget eventPhase metaKey relatedTarget shiftKey target timeStamp view which".split(" "),

	fixHooks: {},

	keyHooks: {
		props: "char charCode key keyCode".split(" "),
		filter: function( event, original ) {

			// Add which for key events
			if ( event.which == null ) {
				event.which = original.charCode != null ? original.charCode : original.keyCode;
			}

			return event;
		}
	},

	mouseHooks: {
		props: "button buttons clientX clientY fromElement offsetX offsetY pageX pageY screenX screenY toElement".split(" "),
		filter: function( event, original ) {
			var eventDoc, doc, body,
				button = original.button,
				fromElement = original.fromElement;

			// Calculate pageX/Y if missing and clientX/Y available
			if ( event.pageX == null && original.clientX != null ) {
				eventDoc = event.target.ownerDocument || document;
				doc = eventDoc.documentElement;
				body = eventDoc.body;

				event.pageX = original.clientX + ( doc && doc.scrollLeft || body && body.scrollLeft || 0 ) - ( doc && doc.clientLeft || body && body.clientLeft || 0 );
				event.pageY = original.clientY + ( doc && doc.scrollTop  || body && body.scrollTop  || 0 ) - ( doc && doc.clientTop  || body && body.clientTop  || 0 );
			}

			// Add relatedTarget, if necessary
			if ( !event.relatedTarget && fromElement ) {
				event.relatedTarget = fromElement === event.target ? original.toElement : fromElement;
			}

			// Add which for click: 1 === left; 2 === middle; 3 === right
			// Note: button is not normalized, so don't use it
			if ( !event.which && button !== undefined ) {
				event.which = ( button & 1 ? 1 : ( button & 2 ? 3 : ( button & 4 ? 2 : 0 ) ) );
			}

			return event;
		}
	},

	fix: function( event ) {
		if ( event[ jQuery.expando ] ) {
			return event;
		}

		// Create a writable copy of the event object and normalize some properties
		var i, prop,
			originalEvent = event,
			fixHook = jQuery.event.fixHooks[ event.type ] || {},
			copy = fixHook.props ? this.props.concat( fixHook.props ) : this.props;

		event = jQuery.Event( originalEvent );

		for ( i = copy.length; i; ) {
			prop = copy[ --i ];
			event[ prop ] = originalEvent[ prop ];
		}

		// Fix target property, if necessary (#1925, IE 6/7/8 & Safari2)
		if ( !event.target ) {
			event.target = originalEvent.srcElement || document;
		}

		// Target should not be a text node (#504, Safari)
		if ( event.target.nodeType === 3 ) {
			event.target = event.target.parentNode;
		}

		// For mouse/key events, metaKey==false if it's undefined (#3368, #11328; IE6/7/8)
		event.metaKey = !!event.metaKey;

		return fixHook.filter? fixHook.filter( event, originalEvent ) : event;
	},

	special: {
		ready: {
			// Make sure the ready event is setup
			setup: jQuery.bindReady
		},

		load: {
			// Prevent triggered image.load events from bubbling to window.load
			noBubble: true
		},

		focus: {
			delegateType: "focusin"
		},
		blur: {
			delegateType: "focusout"
		},

		beforeunload: {
			setup: function( data, namespaces, eventHandle ) {
				// We only want to do this special case on windows
				if ( jQuery.isWindow( this ) ) {
					this.onbeforeunload = eventHandle;
				}
			},

			teardown: function( namespaces, eventHandle ) {
				if ( this.onbeforeunload === eventHandle ) {
					this.onbeforeunload = null;
				}
			}
		}
	},

	simulate: function( type, elem, event, bubble ) {
		// Piggyback on a donor event to simulate a different one.
		// Fake originalEvent to avoid donor's stopPropagation, but if the
		// simulated event prevents default then we do the same on the donor.
		var e = jQuery.extend(
			new jQuery.Event(),
			event,
			{ type: type,
				isSimulated: true,
				originalEvent: {}
			}
		);
		if ( bubble ) {
			jQuery.event.trigger( e, null, elem );
		} else {
			jQuery.event.dispatch.call( elem, e );
		}
		if ( e.isDefaultPrevented() ) {
			event.preventDefault();
		}
	}
};

// Some plugins are using, but it's undocumented/deprecated and will be removed.
// The 1.7 special event interface should provide all the hooks needed now.
jQuery.event.handle = jQuery.event.dispatch;

jQuery.removeEvent = document.removeEventListener ?
	function( elem, type, handle ) {
		if ( elem.removeEventListener ) {
			elem.removeEventListener( type, handle, false );
		}
	} :
	function( elem, type, handle ) {
		var name = "on" + type;

		if ( elem.detachEvent ) {

			// #8545, #7054, preventing memory leaks for custom events in IE6-8 –
			// detachEvent needed property on element, by name of that event, to properly expose it to GC
			if ( typeof elem[ name ] === "undefined" ) {
				elem[ name ] = null;
			}

			elem.detachEvent( name, handle );
		}
	};

jQuery.Event = function( src, props ) {
	// Allow instantiation without the 'new' keyword
	if ( !(this instanceof jQuery.Event) ) {
		return new jQuery.Event( src, props );
	}

	// Event object
	if ( src && src.type ) {
		this.originalEvent = src;
		this.type = src.type;

		// Events bubbling up the document may have been marked as prevented
		// by a handler lower down the tree; reflect the correct value.
		this.isDefaultPrevented = ( src.defaultPrevented || src.returnValue === false ||
			src.getPreventDefault && src.getPreventDefault() ) ? returnTrue : returnFalse;

	// Event type
	} else {
		this.type = src;
	}

	// Put explicitly provided properties onto the event object
	if ( props ) {
		jQuery.extend( this, props );
	}

	// Create a timestamp if incoming event doesn't have one
	this.timeStamp = src && src.timeStamp || jQuery.now();

	// Mark it as fixed
	this[ jQuery.expando ] = true;
};

function returnFalse() {
	return false;
}
function returnTrue() {
	return true;
}

// jQuery.Event is based on DOM3 Events as specified by the ECMAScript Language Binding
// http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html
jQuery.Event.prototype = {
	preventDefault: function() {
		this.isDefaultPrevented = returnTrue;

		var e = this.originalEvent;
		if ( !e ) {
			return;
		}

		// if preventDefault exists run it on the original event
		if ( e.preventDefault ) {
			e.preventDefault();

		// otherwise set the returnValue property of the original event to false (IE)
		} else {
			e.returnValue = false;
		}
	},
	stopPropagation: function() {
		this.isPropagationStopped = returnTrue;

		var e = this.originalEvent;
		if ( !e ) {
			return;
		}
		// if stopPropagation exists run it on the original event
		if ( e.stopPropagation ) {
			e.stopPropagation();
		}
		// otherwise set the cancelBubble property of the original event to true (IE)
		e.cancelBubble = true;
	},
	stopImmediatePropagation: function() {
		this.isImmediatePropagationStopped = returnTrue;
		this.stopPropagation();
	},
	isDefaultPrevented: returnFalse,
	isPropagationStopped: returnFalse,
	isImmediatePropagationStopped: returnFalse
};

// Create mouseenter/leave events using mouseover/out and event-time checks
jQuery.each({
	mouseenter: "mouseover",
	mouseleave: "mouseout"
}, function( orig, fix ) {
	jQuery.event.special[ orig ] = {
		delegateType: fix,
		bindType: fix,

		handle: function( event ) {
			var ret,
				target = this,
				related = event.relatedTarget,
				handleObj = event.handleObj,
				selector = handleObj.selector;

			// For mousenter/leave call the handler if related is outside the target.
			// NB: No relatedTarget if the mouse left/entered the browser window
			if ( !related || (related !== target && !jQuery.contains( target, related )) ) {
				event.type = handleObj.origType;
				ret = handleObj.handler.apply( this, arguments );
				event.type = fix;
			}
			return ret;
		}
	};
});

// IE submit delegation
if ( !jQuery.support.submitBubbles ) {

	jQuery.event.special.submit = {
		setup: function() {
			// Only need this for delegated form submit events
			if ( jQuery.nodeName( this, "form" ) ) {
				return false;
			}

			// Lazy-add a submit handler when a descendant form may potentially be submitted
			jQuery.event.add( this, "click._submit keypress._submit", function( e ) {
				// Node name check avoids a VML-related crash in IE (#9807)
				var elem = e.target,
					form = jQuery.nodeName( elem, "input" ) || jQuery.nodeName( elem, "button" ) ? elem.form : undefined;
				if ( form && !jQuery._data( form, "_submit_attached" ) ) {
					jQuery.event.add( form, "submit._submit", function( event ) {
						event._submit_bubble = true;
					});
					jQuery._data( form, "_submit_attached", true );
				}
			});
			// return undefined since we don't need an event listener
		},

		postDispatch: function( event ) {
			// If form was submitted by the user, bubble the event up the tree
			if ( event._submit_bubble ) {
				delete event._submit_bubble;
				if ( this.parentNode && !event.isTrigger ) {
					jQuery.event.simulate( "submit", this.parentNode, event, true );
				}
			}
		},

		teardown: function() {
			// Only need this for delegated form submit events
			if ( jQuery.nodeName( this, "form" ) ) {
				return false;
			}

			// Remove delegated handlers; cleanData eventually reaps submit handlers attached above
			jQuery.event.remove( this, "._submit" );
		}
	};
}

// IE change delegation and checkbox/radio fix
if ( !jQuery.support.changeBubbles ) {

	jQuery.event.special.change = {

		setup: function() {

			if ( rformElems.test( this.nodeName ) ) {
				// IE doesn't fire change on a check/radio until blur; trigger it on click
				// after a propertychange. Eat the blur-change in special.change.handle.
				// This still fires onchange a second time for check/radio after blur.
				if ( this.type === "checkbox" || this.type === "radio" ) {
					jQuery.event.add( this, "propertychange._change", function( event ) {
						if ( event.originalEvent.propertyName === "checked" ) {
							this._just_changed = true;
						}
					});
					jQuery.event.add( this, "click._change", function( event ) {
						if ( this._just_changed && !event.isTrigger ) {
							this._just_changed = false;
						}
						// Allow triggered, simulated change events (#11500)
						jQuery.event.simulate( "change", this, event, true );
					});
				}
				return false;
			}
			// Delegated event; lazy-add a change handler on descendant inputs
			jQuery.event.add( this, "beforeactivate._change", function( e ) {
				var elem = e.target;

				if ( rformElems.test( elem.nodeName ) && !jQuery._data( elem, "_change_attached" ) ) {
					jQuery.event.add( elem, "change._change", function( event ) {
						if ( this.parentNode && !event.isSimulated && !event.isTrigger ) {
							jQuery.event.simulate( "change", this.parentNode, event, true );
						}
					});
					jQuery._data( elem, "_change_attached", true );
				}
			});
		},

		handle: function( event ) {
			var elem = event.target;

			// Swallow native change events from checkbox/radio, we already triggered them above
			if ( this !== elem || event.isSimulated || event.isTrigger || (elem.type !== "radio" && elem.type !== "checkbox") ) {
				return event.handleObj.handler.apply( this, arguments );
			}
		},

		teardown: function() {
			jQuery.event.remove( this, "._change" );

			return rformElems.test( this.nodeName );
		}
	};
}

// Create "bubbling" focus and blur events
if ( !jQuery.support.focusinBubbles ) {
	jQuery.each({ focus: "focusin", blur: "focusout" }, function( orig, fix ) {

		// Attach a single capturing handler while someone wants focusin/focusout
		var attaches = 0,
			handler = function( event ) {
				jQuery.event.simulate( fix, event.target, jQuery.event.fix( event ), true );
			};

		jQuery.event.special[ fix ] = {
			setup: function() {
				if ( attaches++ === 0 ) {
					document.addEventListener( orig, handler, true );
				}
			},
			teardown: function() {
				if ( --attaches === 0 ) {
					document.removeEventListener( orig, handler, true );
				}
			}
		};
	});
}

jQuery.fn.extend({

	on: function( types, selector, data, fn, /*INTERNAL*/ one ) {
		var origFn, type;

		// Types can be a map of types/handlers
		if ( typeof types === "object" ) {
			// ( types-Object, selector, data )
			if ( typeof selector !== "string" ) { // && selector != null
				// ( types-Object, data )
				data = data || selector;
				selector = undefined;
			}
			for ( type in types ) {
				this.on( type, selector, data, types[ type ], one );
			}
			return this;
		}

		if ( data == null && fn == null ) {
			// ( types, fn )
			fn = selector;
			data = selector = undefined;
		} else if ( fn == null ) {
			if ( typeof selector === "string" ) {
				// ( types, selector, fn )
				fn = data;
				data = undefined;
			} else {
				// ( types, data, fn )
				fn = data;
				data = selector;
				selector = undefined;
			}
		}
		if ( fn === false ) {
			fn = returnFalse;
		} else if ( !fn ) {
			return this;
		}

		if ( one === 1 ) {
			origFn = fn;
			fn = function( event ) {
				// Can use an empty set, since event contains the info
				jQuery().off( event );
				return origFn.apply( this, arguments );
			};
			// Use same guid so caller can remove using origFn
			fn.guid = origFn.guid || ( origFn.guid = jQuery.guid++ );
		}
		return this.each( function() {
			jQuery.event.add( this, types, fn, data, selector );
		});
	},
	one: function( types, selector, data, fn ) {
		return this.on( types, selector, data, fn, 1 );
	},
	off: function( types, selector, fn ) {
		var handleObj, type;
		if ( types && types.preventDefault && types.handleObj ) {
			// ( event )  dispatched jQuery.Event
			handleObj = types.handleObj;
			jQuery( types.delegateTarget ).off(
				handleObj.namespace ? handleObj.origType + "." + handleObj.namespace : handleObj.origType,
				handleObj.selector,
				handleObj.handler
			);
			return this;
		}
		if ( typeof types === "object" ) {
			// ( types-object [, selector] )
			for ( type in types ) {
				this.off( type, selector, types[ type ] );
			}
			return this;
		}
		if ( selector === false || typeof selector === "function" ) {
			// ( types [, fn] )
			fn = selector;
			selector = undefined;
		}
		if ( fn === false ) {
			fn = returnFalse;
		}
		return this.each(function() {
			jQuery.event.remove( this, types, fn, selector );
		});
	},

	bind: function( types, data, fn ) {
		return this.on( types, null, data, fn );
	},
	unbind: function( types, fn ) {
		return this.off( types, null, fn );
	},

	live: function( types, data, fn ) {
		jQuery( this.context ).on( types, this.selector, data, fn );
		return this;
	},
	die: function( types, fn ) {
		jQuery( this.context ).off( types, this.selector || "**", fn );
		return this;
	},

	delegate: function( selector, types, data, fn ) {
		return this.on( types, selector, data, fn );
	},
	undelegate: function( selector, types, fn ) {
		// ( namespace ) or ( selector, types [, fn] )
		return arguments.length == 1? this.off( selector, "**" ) : this.off( types, selector || "**", fn );
	},

	trigger: function( type, data ) {
		return this.each(function() {
			jQuery.event.trigger( type, data, this );
		});
	},
	triggerHandler: function( type, data ) {
		if ( this[0] ) {
			return jQuery.event.trigger( type, data, this[0], true );
		}
	},

	toggle: function( fn ) {
		// Save reference to arguments for access in closure
		var args = arguments,
			guid = fn.guid || jQuery.guid++,
			i = 0,
			toggler = function( event ) {
				// Figure out which function to execute
				var lastToggle = ( jQuery._data( this, "lastToggle" + fn.guid ) || 0 ) % i;
				jQuery._data( this, "lastToggle" + fn.guid, lastToggle + 1 );

				// Make sure that clicks stop
				event.preventDefault();

				// and execute the function
				return args[ lastToggle ].apply( this, arguments ) || false;
			};

		// link all the functions, so any of them can unbind this click handler
		toggler.guid = guid;
		while ( i < args.length ) {
			args[ i++ ].guid = guid;
		}

		return this.click( toggler );
	},

	hover: function( fnOver, fnOut ) {
		return this.mouseenter( fnOver ).mouseleave( fnOut || fnOver );
	}
});

jQuery.each( ("blur focus focusin focusout load resize scroll unload click dblclick " +
	"mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave " +
	"change select submit keydown keypress keyup error contextmenu").split(" "), function( i, name ) {

	// Handle event binding
	jQuery.fn[ name ] = function( data, fn ) {
		if ( fn == null ) {
			fn = data;
			data = null;
		}

		return arguments.length > 0 ?
			this.on( name, null, data, fn ) :
			this.trigger( name );
	};

	if ( rkeyEvent.test( name ) ) {
		jQuery.event.fixHooks[ name ] = jQuery.event.keyHooks;
	}

	if ( rmouseEvent.test( name ) ) {
		jQuery.event.fixHooks[ name ] = jQuery.event.mouseHooks;
	}
});
/*!
 * Sizzle CSS Selector Engine
 *  Copyright 2012 jQuery Foundation and other contributors
 *  Released under the MIT license
 *  http://sizzlejs.com/
 */
(function( window, undefined ) {

var cachedruns,
	dirruns,
	sortOrder,
	siblingCheck,
	assertGetIdNotName,

	document = window.document,
	docElem = document.documentElement,

	strundefined = "undefined",
	hasDuplicate = false,
	baseHasDuplicate = true,
	done = 0,
	slice = [].slice,
	push = [].push,

	expando = ( "sizcache" + Math.random() ).replace( ".", "" ),

	// Regex

	// Whitespace characters http://www.w3.org/TR/css3-selectors/#whitespace
	whitespace = "[\\x20\\t\\r\\n\\f]",
	// http://www.w3.org/TR/css3-syntax/#characters
	characterEncoding = "(?:\\\\.|[-\\w]|[^\\x00-\\xa0])+",

	// Loosely modeled on CSS identifier characters
	// An unquoted value should be a CSS identifier (http://www.w3.org/TR/css3-selectors/#attribute-selectors)
	// Proper syntax: http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier
	identifier = characterEncoding.replace( "w", "w#" ),

	// Acceptable operators http://www.w3.org/TR/selectors/#attribute-selectors
	operators = "([*^$|!~]?=)",
	attributes = "\\[" + whitespace + "*(" + characterEncoding + ")" + whitespace +
		"*(?:" + operators + whitespace + "*(?:(['\"])((?:\\\\.|[^\\\\])*?)\\3|(" + identifier + ")|)|)" + whitespace + "*\\]",
	pseudos = ":(" + characterEncoding + ")(?:\\((?:(['\"])((?:\\\\.|[^\\\\])*?)\\2|((?:[^,]|\\\\,|(?:,(?=[^\\[]*\\]))|(?:,(?=[^\\(]*\\))))*))\\)|)",
	pos = ":(nth|eq|gt|lt|first|last|even|odd)(?:\\((\\d*)\\)|)(?=[^-]|$)",
	combinators = whitespace + "*([\\x20\\t\\r\\n\\f>+~])" + whitespace + "*",
	groups = "(?=[^\\x20\\t\\r\\n\\f])(?:\\\\.|" + attributes + "|" + pseudos.replace( 2, 7 ) + "|[^\\\\(),])+",

	// Leading and non-escaped trailing whitespace, capturing some non-whitespace characters preceding the latter
	rtrim = new RegExp( "^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" + whitespace + "+$", "g" ),

	rcombinators = new RegExp( "^" + combinators ),

	// All simple (non-comma) selectors, excluding insignifant trailing whitespace
	rgroups = new RegExp( groups + "?(?=" + whitespace + "*,|$)", "g" ),

	// A selector, or everything after leading whitespace
	// Optionally followed in either case by a ")" for terminating sub-selectors
	rselector = new RegExp( "^(?:(?!,)(?:(?:^|,)" + whitespace + "*" + groups + ")*?|" + whitespace + "*(.*?))(\\)|$)" ),

	// All combinators and selector components (attribute test, tag, pseudo, etc.), the latter appearing together when consecutive
	rtokens = new RegExp( groups.slice( 19, -6 ) + "\\x20\\t\\r\\n\\f>+~])+|" + combinators, "g" ),

	// Easily-parseable/retrievable ID or TAG or CLASS selectors
	rquickExpr = /^(?:#([\w\-]+)|(\w+)|\.([\w\-]+))$/,

	rsibling = /[\x20\t\r\n\f]*[+~]/,
	rendsWithNot = /:not\($/,

	rheader = /h\d/i,
	rinputs = /input|select|textarea|button/i,

	rbackslash = /\\(?!\\)/g,

	matchExpr = {
		"ID": new RegExp( "^#(" + characterEncoding + ")" ),
		"CLASS": new RegExp( "^\\.(" + characterEncoding + ")" ),
		"NAME": new RegExp( "^\\[name=['\"]?(" + characterEncoding + ")['\"]?\\]" ),
		"TAG": new RegExp( "^(" + characterEncoding.replace( "[-", "[-\\*" ) + ")" ),
		"ATTR": new RegExp( "^" + attributes ),
		"PSEUDO": new RegExp( "^" + pseudos ),
		"CHILD": new RegExp( "^:(only|nth|last|first)-child(?:\\(" + whitespace +
			"*(even|odd|(([+-]|)(\\d*)n|)" + whitespace + "*(?:([+-]|)" + whitespace +
			"*(\\d+)|))" + whitespace + "*\\)|)", "i" ),
		"POS": new RegExp( pos, "ig" ),
		// For use in libraries implementing .is()
		"needsContext": new RegExp( "^" + whitespace + "*[>+~]|" + pos, "i" )
	},

	classCache = {},
	cachedClasses = [],
	compilerCache = {},
	cachedSelectors = [],

	// Mark a function for use in filtering
	markFunction = function( fn ) {
		fn.sizzleFilter = true;
		return fn;
	},

	// Returns a function to use in pseudos for input types
	createInputFunction = function( type ) {
		return function( elem ) {
			// Check the input's nodeName and type
			return elem.nodeName.toLowerCase() === "input" && elem.type === type;
		};
	},

	// Returns a function to use in pseudos for buttons
	createButtonFunction = function( type ) {
		return function( elem ) {
			var name = elem.nodeName.toLowerCase();
			return (name === "input" || name === "button") && elem.type === type;
		};
	},

	// Used for testing something on an element
	assert = function( fn ) {
		var pass = false,
			div = document.createElement("div");
		try {
			pass = fn( div );
		} catch (e) {}
		// release memory in IE
		div = null;
		return pass;
	},

	// Check if attributes should be retrieved by attribute nodes
	assertAttributes = assert(function( div ) {
		div.innerHTML = "<select></select>";
		var type = typeof div.lastChild.getAttribute("multiple");
		// IE8 returns a string for some attributes even when not present
		return type !== "boolean" && type !== "string";
	}),

	// Check if getElementById returns elements by name
	// Check if getElementsByName privileges form controls or returns elements by ID
	assertUsableName = assert(function( div ) {
		// Inject content
		div.id = expando + 0;
		div.innerHTML = "<a name='" + expando + "'></a><div name='" + expando + "'></div>";
		docElem.insertBefore( div, docElem.firstChild );

		// Test
		var pass = document.getElementsByName &&
			// buggy browsers will return fewer than the correct 2
			document.getElementsByName( expando ).length ===
			// buggy browsers will return more than the correct 0
			2 + document.getElementsByName( expando + 0 ).length;
		assertGetIdNotName = !document.getElementById( expando );

		// Cleanup
		docElem.removeChild( div );

		return pass;
	}),

	// Check if the browser returns only elements
	// when doing getElementsByTagName("*")
	assertTagNameNoComments = assert(function( div ) {
		div.appendChild( document.createComment("") );
		return div.getElementsByTagName("*").length === 0;
	}),

	// Check if getAttribute returns normalized href attributes
	assertHrefNotNormalized = assert(function( div ) {
		div.innerHTML = "<a href='#'></a>";
		return div.firstChild && typeof div.firstChild.getAttribute !== strundefined &&
			div.firstChild.getAttribute("href") === "#";
	}),

	// Check if getElementsByClassName can be trusted
	assertUsableClassName = assert(function( div ) {
		// Opera can't find a second classname (in 9.6)
		div.innerHTML = "<div class='hidden e'></div><div class='hidden'></div>";
		if ( !div.getElementsByClassName || div.getElementsByClassName("e").length === 0 ) {
			return false;
		}

		// Safari caches class attributes, doesn't catch changes (in 3.2)
		div.lastChild.className = "e";
		return div.getElementsByClassName("e").length !== 1;
	});

var Sizzle = function( selector, context, results, seed ) {
	results = results || [];
	context = context || document;
	var match, elem, xml, m,
		nodeType = context.nodeType;

	if ( nodeType !== 1 && nodeType !== 9 ) {
		return [];
	}

	if ( !selector || typeof selector !== "string" ) {
		return results;
	}

	xml = isXML( context );

	if ( !xml && !seed ) {
		if ( (match = rquickExpr.exec( selector )) ) {
			// Speed-up: Sizzle("#ID")
			if ( (m = match[1]) ) {
				if ( nodeType === 9 ) {
					elem = context.getElementById( m );
					// Check parentNode to catch when Blackberry 4.6 returns
					// nodes that are no longer in the document #6963
					if ( elem && elem.parentNode ) {
						// Handle the case where IE, Opera, and Webkit return items
						// by name instead of ID
						if ( elem.id === m ) {
							results.push( elem );
							return results;
						}
					} else {
						return results;
					}
				} else {
					// Context is not a document
					if ( context.ownerDocument && (elem = context.ownerDocument.getElementById( m )) &&
						contains( context, elem ) && elem.id === m ) {
						results.push( elem );
						return results;
					}
				}

			// Speed-up: Sizzle("TAG")
			} else if ( match[2] ) {
				push.apply( results, slice.call(context.getElementsByTagName( selector ), 0) );
				return results;

			// Speed-up: Sizzle(".CLASS")
			} else if ( (m = match[3]) && assertUsableClassName && context.getElementsByClassName ) {
				push.apply( results, slice.call(context.getElementsByClassName( m ), 0) );
				return results;
			}
		}
	}

	// All others
	return select( selector, context, results, seed, xml );
};

var Expr = Sizzle.selectors = {

	// Can be adjusted by the user
	cacheLength: 50,

	match: matchExpr,

	order: [ "ID", "TAG" ],

	attrHandle: {},

	createPseudo: markFunction,

	find: {
		"ID": assertGetIdNotName ?
			function( id, context, xml ) {
				if ( typeof context.getElementById !== strundefined && !xml ) {
					var m = context.getElementById( id );
					// Check parentNode to catch when Blackberry 4.6 returns
					// nodes that are no longer in the document #6963
					return m && m.parentNode ? [m] : [];
				}
			} :
			function( id, context, xml ) {
				if ( typeof context.getElementById !== strundefined && !xml ) {
					var m = context.getElementById( id );

					return m ?
						m.id === id || typeof m.getAttributeNode !== strundefined && m.getAttributeNode("id").value === id ?
							[m] :
							undefined :
						[];
				}
			},

		"TAG": assertTagNameNoComments ?
			function( tag, context ) {
				if ( typeof context.getElementsByTagName !== strundefined ) {
					return context.getElementsByTagName( tag );
				}
			} :
			function( tag, context ) {
				var results = context.getElementsByTagName( tag );

				// Filter out possible comments
				if ( tag === "*" ) {
					var elem,
						tmp = [],
						i = 0;

					for ( ; (elem = results[i]); i++ ) {
						if ( elem.nodeType === 1 ) {
							tmp.push( elem );
						}
					}

					return tmp;
				}
				return results;
			}
	},

	relative: {
		">": { dir: "parentNode", first: true },
		" ": { dir: "parentNode" },
		"+": { dir: "previousSibling", first: true },
		"~": { dir: "previousSibling" }
	},

	preFilter: {
		"ATTR": function( match ) {
			match[1] = match[1].replace( rbackslash, "" );

			// Move the given value to match[3] whether quoted or unquoted
			match[3] = ( match[4] || match[5] || "" ).replace( rbackslash, "" );

			if ( match[2] === "~=" ) {
				match[3] = " " + match[3] + " ";
			}

			return match.slice( 0, 4 );
		},

		"CHILD": function( match ) {
			/* matches from matchExpr.CHILD
				1 type (only|nth|...)
				2 argument (even|odd|\d*|\d*n([+-]\d+)?|...)
				3 xn-component of xn+y argument ([+-]?\d*n|)
				4 sign of xn-component
				5 x of xn-component
				6 sign of y-component
				7 y of y-component
			*/
			match[1] = match[1].toLowerCase();

			if ( match[1] === "nth" ) {
				// nth-child requires argument
				if ( !match[2] ) {
					Sizzle.error( match[0] );
				}

				// numeric x and y parameters for Expr.filter.CHILD
				// remember that false/true cast respectively to 0/1
				match[3] = +( match[3] ? match[4] + (match[5] || 1) : 2 * ( match[2] === "even" || match[2] === "odd" ) );
				match[4] = +( ( match[6] + match[7] ) || match[2] === "odd" );

			// other types prohibit arguments
			} else if ( match[2] ) {
				Sizzle.error( match[0] );
			}

			return match;
		},

		"PSEUDO": function( match ) {
			var argument,
				unquoted = match[4];

			if ( matchExpr["CHILD"].test( match[0] ) ) {
				return null;
			}

			// Relinquish our claim on characters in `unquoted` from a closing parenthesis on
			if ( unquoted && (argument = rselector.exec( unquoted )) && argument.pop() ) {

				match[0] = match[0].slice( 0, argument[0].length - unquoted.length - 1 );
				unquoted = argument[0].slice( 0, -1 );
			}

			// Quoted or unquoted, we have the full argument
			// Return only captures needed by the pseudo filter method (type and argument)
			match.splice( 2, 3, unquoted || match[3] );
			return match;
		}
	},

	filter: {
		"ID": assertGetIdNotName ?
			function( id ) {
				id = id.replace( rbackslash, "" );
				return function( elem ) {
					return elem.getAttribute("id") === id;
				};
			} :
			function( id ) {
				id = id.replace( rbackslash, "" );
				return function( elem ) {
					var node = typeof elem.getAttributeNode !== strundefined && elem.getAttributeNode("id");
					return node && node.value === id;
				};
			},

		"TAG": function( nodeName ) {
			if ( nodeName === "*" ) {
				return function() { return true; };
			}
			nodeName = nodeName.replace( rbackslash, "" ).toLowerCase();

			return function( elem ) {
				return elem.nodeName && elem.nodeName.toLowerCase() === nodeName;
			};
		},

		"CLASS": function( className ) {
			var pattern = classCache[ className ];
			if ( !pattern ) {
				pattern = classCache[ className ] = new RegExp( "(^|" + whitespace + ")" + className + "(" + whitespace + "|$)" );
				cachedClasses.push( className );
				// Avoid too large of a cache
				if ( cachedClasses.length > Expr.cacheLength ) {
					delete classCache[ cachedClasses.shift() ];
				}
			}
			return function( elem ) {
				return pattern.test( elem.className || (typeof elem.getAttribute !== strundefined && elem.getAttribute("class")) || "" );
			};
		},

		"ATTR": function( name, operator, check ) {
			if ( !operator ) {
				return function( elem ) {
					return Sizzle.attr( elem, name ) != null;
				};
			}

			return function( elem ) {
				var result = Sizzle.attr( elem, name ),
					value = result + "";

				if ( result == null ) {
					return operator === "!=";
				}

				switch ( operator ) {
					case "=":
						return value === check;
					case "!=":
						return value !== check;
					case "^=":
						return check && value.indexOf( check ) === 0;
					case "*=":
						return check && value.indexOf( check ) > -1;
					case "$=":
						return check && value.substr( value.length - check.length ) === check;
					case "~=":
						return ( " " + value + " " ).indexOf( check ) > -1;
					case "|=":
						return value === check || value.substr( 0, check.length + 1 ) === check + "-";
				}
			};
		},

		"CHILD": function( type, argument, first, last ) {

			if ( type === "nth" ) {
				var doneName = done++;

				return function( elem ) {
					var parent, diff,
						count = 0,
						node = elem;

					if ( first === 1 && last === 0 ) {
						return true;
					}

					parent = elem.parentNode;

					if ( parent && (parent[ expando ] !== doneName || !elem.sizset) ) {
						for ( node = parent.firstChild; node; node = node.nextSibling ) {
							if ( node.nodeType === 1 ) {
								node.sizset = ++count;
								if ( node === elem ) {
									break;
								}
							}
						}

						parent[ expando ] = doneName;
					}

					diff = elem.sizset - last;

					if ( first === 0 ) {
						return diff === 0;

					} else {
						return ( diff % first === 0 && diff / first >= 0 );
					}
				};
			}

			return function( elem ) {
				var node = elem;

				switch ( type ) {
					case "only":
					case "first":
						while ( (node = node.previousSibling) ) {
							if ( node.nodeType === 1 ) {
								return false;
							}
						}

						if ( type === "first" ) {
							return true;
						}

						node = elem;

						/* falls through */
					case "last":
						while ( (node = node.nextSibling) ) {
							if ( node.nodeType === 1 ) {
								return false;
							}
						}

						return true;
				}
			};
		},

		"PSEUDO": function( pseudo, argument, context, xml ) {
			// pseudo-class names are case-insensitive
			// http://www.w3.org/TR/selectors/#pseudo-classes
			// Prioritize by case sensitivity in case custom pseudos are added with uppercase letters
			var fn = Expr.pseudos[ pseudo ] || Expr.pseudos[ pseudo.toLowerCase() ];

			if ( !fn ) {
				Sizzle.error( "unsupported pseudo: " + pseudo );
			}

			// The user may set fn.sizzleFilter to indicate
			// that arguments are needed to create the filter function
			// just as Sizzle does
			if ( !fn.sizzleFilter ) {
				return fn;
			}

			return fn( argument, context, xml );
		}
	},

	pseudos: {
		"not": markFunction(function( selector, context, xml ) {
			// Trim the selector passed to compile
			// to avoid treating leading and trailing
			// spaces as combinators
			var matcher = compile( selector.replace( rtrim, "$1" ), context, xml );
			return function( elem ) {
				return !matcher( elem );
			};
		}),

		"enabled": function( elem ) {
			return elem.disabled === false;
		},

		"disabled": function( elem ) {
			return elem.disabled === true;
		},

		"checked": function( elem ) {
			// In CSS3, :checked should return both checked and selected elements
			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
			var nodeName = elem.nodeName.toLowerCase();
			return (nodeName === "input" && !!elem.checked) || (nodeName === "option" && !!elem.selected);
		},

		"selected": function( elem ) {
			// Accessing this property makes selected-by-default
			// options in Safari work properly
			if ( elem.parentNode ) {
				elem.parentNode.selectedIndex;
			}

			return elem.selected === true;
		},

		"parent": function( elem ) {
			return !Expr.pseudos["empty"]( elem );
		},

		"empty": function( elem ) {
			// http://www.w3.org/TR/selectors/#empty-pseudo
			// :empty is only affected by element nodes and content nodes(including text(3), cdata(4)),
			//   not comment, processing instructions, or others
			// Thanks to Diego Perini for the nodeName shortcut
			//   Greater than "@" means alpha characters (specifically not starting with "#" or "?")
			var nodeType;
			elem = elem.firstChild;
			while ( elem ) {
				if ( elem.nodeName > "@" || (nodeType = elem.nodeType) === 3 || nodeType === 4 ) {
					return false;
				}
				elem = elem.nextSibling;
			}
			return true;
		},

		"contains": markFunction(function( text ) {
			return function( elem ) {
				return ( elem.textContent || elem.innerText || getText( elem ) ).indexOf( text ) > -1;
			};
		}),

		"has": markFunction(function( selector ) {
			return function( elem ) {
				return Sizzle( selector, elem ).length > 0;
			};
		}),

		"header": function( elem ) {
			return rheader.test( elem.nodeName );
		},

		"text": function( elem ) {
			var type, attr;
			// IE6 and 7 will map elem.type to 'text' for new HTML5 types (search, etc)
			// use getAttribute instead to test this case
			return elem.nodeName.toLowerCase() === "input" &&
				(type = elem.type) === "text" &&
				( (attr = elem.getAttribute("type")) == null || attr.toLowerCase() === type );
		},

		// Input types
		"radio": createInputFunction("radio"),
		"checkbox": createInputFunction("checkbox"),
		"file": createInputFunction("file"),
		"password": createInputFunction("password"),
		"image": createInputFunction("image"),

		"submit": createButtonFunction("submit"),
		"reset": createButtonFunction("reset"),

		"button": function( elem ) {
			var name = elem.nodeName.toLowerCase();
			return name === "input" && elem.type === "button" || name === "button";
		},

		"input": function( elem ) {
			return rinputs.test( elem.nodeName );
		},

		"focus": function( elem ) {
			var doc = elem.ownerDocument;
			return elem === doc.activeElement && (!doc.hasFocus || doc.hasFocus()) && !!(elem.type || elem.href);
		},

		"active": function( elem ) {
			return elem === elem.ownerDocument.activeElement;
		}
	},

	setFilters: {
		"first": function( elements, argument, not ) {
			return not ? elements.slice( 1 ) : [ elements[0] ];
		},

		"last": function( elements, argument, not ) {
			var elem = elements.pop();
			return not ? elements : [ elem ];
		},

		"even": function( elements, argument, not ) {
			var results = [],
				i = not ? 1 : 0,
				len = elements.length;
			for ( ; i < len; i = i + 2 ) {
				results.push( elements[i] );
			}
			return results;
		},

		"odd": function( elements, argument, not ) {
			var results = [],
				i = not ? 0 : 1,
				len = elements.length;
			for ( ; i < len; i = i + 2 ) {
				results.push( elements[i] );
			}
			return results;
		},

		"lt": function( elements, argument, not ) {
			return not ? elements.slice( +argument ) : elements.slice( 0, +argument );
		},

		"gt": function( elements, argument, not ) {
			return not ? elements.slice( 0, +argument + 1 ) : elements.slice( +argument + 1 );
		},

		"eq": function( elements, argument, not ) {
			var elem = elements.splice( +argument, 1 );
			return not ? elements : elem;
		}
	}
};

// Deprecated
Expr.setFilters["nth"] = Expr.setFilters["eq"];

// Back-compat
Expr.filters = Expr.pseudos;

// IE6/7 return a modified href
if ( !assertHrefNotNormalized ) {
	Expr.attrHandle = {
		"href": function( elem ) {
			return elem.getAttribute( "href", 2 );
		},
		"type": function( elem ) {
			return elem.getAttribute("type");
		}
	};
}

// Add getElementsByName if usable
if ( assertUsableName ) {
	Expr.order.push("NAME");
	Expr.find["NAME"] = function( name, context ) {
		if ( typeof context.getElementsByName !== strundefined ) {
			return context.getElementsByName( name );
		}
	};
}

// Add getElementsByClassName if usable
if ( assertUsableClassName ) {
	Expr.order.splice( 1, 0, "CLASS" );
	Expr.find["CLASS"] = function( className, context, xml ) {
		if ( typeof context.getElementsByClassName !== strundefined && !xml ) {
			return context.getElementsByClassName( className );
		}
	};
}

// If slice is not available, provide a backup
try {
	slice.call( docElem.childNodes, 0 )[0].nodeType;
} catch ( e ) {
	slice = function( i ) {
		var elem, results = [];
		for ( ; (elem = this[i]); i++ ) {
			results.push( elem );
		}
		return results;
	};
}

var isXML = Sizzle.isXML = function( elem ) {
	// documentElement is verified for cases where it doesn't yet exist
	// (such as loading iframes in IE - #4833)
	var documentElement = elem && (elem.ownerDocument || elem).documentElement;
	return documentElement ? documentElement.nodeName !== "HTML" : false;
};

// Element contains another
var contains = Sizzle.contains = docElem.compareDocumentPosition ?
	function( a, b ) {
		return !!( a.compareDocumentPosition( b ) & 16 );
	} :
	docElem.contains ?
	function( a, b ) {
		var adown = a.nodeType === 9 ? a.documentElement : a,
			bup = b.parentNode;
		return a === bup || !!( bup && bup.nodeType === 1 && adown.contains && adown.contains(bup) );
	} :
	function( a, b ) {
		while ( (b = b.parentNode) ) {
			if ( b === a ) {
				return true;
			}
		}
		return false;
	};

/**
 * Utility function for retrieving the text value of an array of DOM nodes
 * @param {Array|Element} elem
 */
var getText = Sizzle.getText = function( elem ) {
	var node,
		ret = "",
		i = 0,
		nodeType = elem.nodeType;

	if ( nodeType ) {
		if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
			// Use textContent for elements
			// innerText usage removed for consistency of new lines (see #11153)
			if ( typeof elem.textContent === "string" ) {
				return elem.textContent;
			} else {
				// Traverse its children
				for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
					ret += getText( elem );
				}
			}
		} else if ( nodeType === 3 || nodeType === 4 ) {
			return elem.nodeValue;
		}
		// Do not include comment or processing instruction nodes
	} else {

		// If no nodeType, this is expected to be an array
		for ( ; (node = elem[i]); i++ ) {
			// Do not traverse comment nodes
			ret += getText( node );
		}
	}
	return ret;
};

Sizzle.attr = function( elem, name ) {
	var attr,
		xml = isXML( elem );

	if ( !xml ) {
		name = name.toLowerCase();
	}
	if ( Expr.attrHandle[ name ] ) {
		return Expr.attrHandle[ name ]( elem );
	}
	if ( assertAttributes || xml ) {
		return elem.getAttribute( name );
	}
	attr = elem.getAttributeNode( name );
	return attr ?
		typeof elem[ name ] === "boolean" ?
			elem[ name ] ? name : null :
			attr.specified ? attr.value : null :
		null;
};

Sizzle.error = function( msg ) {
	throw new Error( "Syntax error, unrecognized expression: " + msg );
};

// Check if the JavaScript engine is using some sort of
// optimization where it does not always call our comparision
// function. If that is the case, discard the hasDuplicate value.
//   Thus far that includes Google Chrome.
[0, 0].sort(function() {
	return (baseHasDuplicate = 0);
});


if ( docElem.compareDocumentPosition ) {
	sortOrder = function( a, b ) {
		if ( a === b ) {
			hasDuplicate = true;
			return 0;
		}

		return ( !a.compareDocumentPosition || !b.compareDocumentPosition ?
			a.compareDocumentPosition :
			a.compareDocumentPosition(b) & 4
		) ? -1 : 1;
	};

} else {
	sortOrder = function( a, b ) {
		// The nodes are identical, we can exit early
		if ( a === b ) {
			hasDuplicate = true;
			return 0;

		// Fallback to using sourceIndex (in IE) if it's available on both nodes
		} else if ( a.sourceIndex && b.sourceIndex ) {
			return a.sourceIndex - b.sourceIndex;
		}

		var al, bl,
			ap = [],
			bp = [],
			aup = a.parentNode,
			bup = b.parentNode,
			cur = aup;

		// If the nodes are siblings (or identical) we can do a quick check
		if ( aup === bup ) {
			return siblingCheck( a, b );

		// If no parents were found then the nodes are disconnected
		} else if ( !aup ) {
			return -1;

		} else if ( !bup ) {
			return 1;
		}

		// Otherwise they're somewhere else in the tree so we need
		// to build up a full list of the parentNodes for comparison
		while ( cur ) {
			ap.unshift( cur );
			cur = cur.parentNode;
		}

		cur = bup;

		while ( cur ) {
			bp.unshift( cur );
			cur = cur.parentNode;
		}

		al = ap.length;
		bl = bp.length;

		// Start walking down the tree looking for a discrepancy
		for ( var i = 0; i < al && i < bl; i++ ) {
			if ( ap[i] !== bp[i] ) {
				return siblingCheck( ap[i], bp[i] );
			}
		}

		// We ended someplace up the tree so do a sibling check
		return i === al ?
			siblingCheck( a, bp[i], -1 ) :
			siblingCheck( ap[i], b, 1 );
	};

	siblingCheck = function( a, b, ret ) {
		if ( a === b ) {
			return ret;
		}

		var cur = a.nextSibling;

		while ( cur ) {
			if ( cur === b ) {
				return -1;
			}

			cur = cur.nextSibling;
		}

		return 1;
	};
}

// Document sorting and removing duplicates
Sizzle.uniqueSort = function( results ) {
	var elem,
		i = 1;

	if ( sortOrder ) {
		hasDuplicate = baseHasDuplicate;
		results.sort( sortOrder );

		if ( hasDuplicate ) {
			for ( ; (elem = results[i]); i++ ) {
				if ( elem === results[ i - 1 ] ) {
					results.splice( i--, 1 );
				}
			}
		}
	}

	return results;
};

function multipleContexts( selector, contexts, results, seed ) {
	var i = 0,
		len = contexts.length;
	for ( ; i < len; i++ ) {
		Sizzle( selector, contexts[i], results, seed );
	}
}

function handlePOSGroup( selector, posfilter, argument, contexts, seed, not ) {
	var results,
		fn = Expr.setFilters[ posfilter.toLowerCase() ];

	if ( !fn ) {
		Sizzle.error( posfilter );
	}

	if ( selector || !(results = seed) ) {
		multipleContexts( selector || "*", contexts, (results = []), seed );
	}

	return results.length > 0 ? fn( results, argument, not ) : [];
}

function handlePOS( selector, context, results, seed, groups ) {
	var match, not, anchor, ret, elements, currentContexts, part, lastIndex,
		i = 0,
		len = groups.length,
		rpos = matchExpr["POS"],
		// This is generated here in case matchExpr["POS"] is extended
		rposgroups = new RegExp( "^" + rpos.source + "(?!" + whitespace + ")", "i" ),
		// This is for making sure non-participating
		// matching groups are represented cross-browser (IE6-8)
		setUndefined = function() {
			var i = 1,
				len = arguments.length - 2;
			for ( ; i < len; i++ ) {
				if ( arguments[i] === undefined ) {
					match[i] = undefined;
				}
			}
		};

	for ( ; i < len; i++ ) {
		// Reset regex index to 0
		rpos.exec("");
		selector = groups[i];
		ret = [];
		anchor = 0;
		elements = seed;
		while ( (match = rpos.exec( selector )) ) {
			lastIndex = rpos.lastIndex = match.index + match[0].length;
			if ( lastIndex > anchor ) {
				part = selector.slice( anchor, match.index );
				anchor = lastIndex;
				currentContexts = [ context ];

				if ( rcombinators.test(part) ) {
					if ( elements ) {
						currentContexts = elements;
					}
					elements = seed;
				}

				if ( (not = rendsWithNot.test( part )) ) {
					part = part.slice( 0, -5 ).replace( rcombinators, "$&*" );
				}

				if ( match.length > 1 ) {
					match[0].replace( rposgroups, setUndefined );
				}
				elements = handlePOSGroup( part, match[1], match[2], currentContexts, elements, not );
			}
		}

		if ( elements ) {
			ret = ret.concat( elements );

			if ( (part = selector.slice( anchor )) && part !== ")" ) {
				if ( rcombinators.test(part) ) {
					multipleContexts( part, ret, results, seed );
				} else {
					Sizzle( part, context, results, seed ? seed.concat(elements) : elements );
				}
			} else {
				push.apply( results, ret );
			}
		} else {
			Sizzle( selector, context, results, seed );
		}
	}

	// Do not sort if this is a single filter
	return len === 1 ? results : Sizzle.uniqueSort( results );
}

function tokenize( selector, context, xml ) {
	var tokens, soFar, type,
		groups = [],
		i = 0,

		// Catch obvious selector issues: terminal ")"; nonempty fallback match
		// rselector never fails to match *something*
		match = rselector.exec( selector ),
		matched = !match.pop() && !match.pop(),
		selectorGroups = matched && selector.match( rgroups ) || [""],

		preFilters = Expr.preFilter,
		filters = Expr.filter,
		checkContext = !xml && context !== document;

	for ( ; (soFar = selectorGroups[i]) != null && matched; i++ ) {
		groups.push( tokens = [] );

		// Need to make sure we're within a narrower context if necessary
		// Adding a descendant combinator will generate what is needed
		if ( checkContext ) {
			soFar = " " + soFar;
		}

		while ( soFar ) {
			matched = false;

			// Combinators
			if ( (match = rcombinators.exec( soFar )) ) {
				soFar = soFar.slice( match[0].length );

				// Cast descendant combinators to space
				matched = tokens.push({ part: match.pop().replace( rtrim, " " ), captures: match });
			}

			// Filters
			for ( type in filters ) {
				if ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||
					(match = preFilters[ type ]( match, context, xml )) ) ) {

					soFar = soFar.slice( match.shift().length );
					matched = tokens.push({ part: type, captures: match });
				}
			}

			if ( !matched ) {
				break;
			}
		}
	}

	if ( !matched ) {
		Sizzle.error( selector );
	}

	return groups;
}

function addCombinator( matcher, combinator, context ) {
	var dir = combinator.dir,
		doneName = done++;

	if ( !matcher ) {
		// If there is no matcher to check, check against the context
		matcher = function( elem ) {
			return elem === context;
		};
	}
	return combinator.first ?
		function( elem, context ) {
			while ( (elem = elem[ dir ]) ) {
				if ( elem.nodeType === 1 ) {
					return matcher( elem, context ) && elem;
				}
			}
		} :
		function( elem, context ) {
			var cache,
				dirkey = doneName + "." + dirruns,
				cachedkey = dirkey + "." + cachedruns;
			while ( (elem = elem[ dir ]) ) {
				if ( elem.nodeType === 1 ) {
					if ( (cache = elem[ expando ]) === cachedkey ) {
						return elem.sizset;
					} else if ( typeof cache === "string" && cache.indexOf(dirkey) === 0 ) {
						if ( elem.sizset ) {
							return elem;
						}
					} else {
						elem[ expando ] = cachedkey;
						if ( matcher( elem, context ) ) {
							elem.sizset = true;
							return elem;
						}
						elem.sizset = false;
					}
				}
			}
		};
}

function addMatcher( higher, deeper ) {
	return higher ?
		function( elem, context ) {
			var result = deeper( elem, context );
			return result && higher( result === true ? elem : result, context );
		} :
		deeper;
}

// ["TAG", ">", "ID", " ", "CLASS"]
function matcherFromTokens( tokens, context, xml ) {
	var token, matcher,
		i = 0;

	for ( ; (token = tokens[i]); i++ ) {
		if ( Expr.relative[ token.part ] ) {
			matcher = addCombinator( matcher, Expr.relative[ token.part ], context );
		} else {
			token.captures.push( context, xml );
			matcher = addMatcher( matcher, Expr.filter[ token.part ].apply( null, token.captures ) );
		}
	}

	return matcher;
}

function matcherFromGroupMatchers( matchers ) {
	return function( elem, context ) {
		var matcher,
			j = 0;
		for ( ; (matcher = matchers[j]); j++ ) {
			if ( matcher(elem, context) ) {
				return true;
			}
		}
		return false;
	};
}

var compile = Sizzle.compile = function( selector, context, xml ) {
	var tokens, group, i,
		cached = compilerCache[ selector ];

	// Return a cached group function if already generated (context dependent)
	if ( cached && cached.context === context ) {
		return cached;
	}

	// Generate a function of recursive functions that can be used to check each element
	group = tokenize( selector, context, xml );
	for ( i = 0; (tokens = group[i]); i++ ) {
		group[i] = matcherFromTokens( tokens, context, xml );
	}

	// Cache the compiled function
	cached = compilerCache[ selector ] = matcherFromGroupMatchers( group );
	cached.context = context;
	cached.runs = cached.dirruns = 0;
	cachedSelectors.push( selector );
	// Ensure only the most recent are cached
	if ( cachedSelectors.length > Expr.cacheLength ) {
		delete compilerCache[ cachedSelectors.shift() ];
	}
	return cached;
};

Sizzle.matches = function( expr, elements ) {
	return Sizzle( expr, null, null, elements );
};

Sizzle.matchesSelector = function( elem, expr ) {
	return Sizzle( expr, null, null, [ elem ] ).length > 0;
};

var select = function( selector, context, results, seed, xml ) {
	// Remove excessive whitespace
	selector = selector.replace( rtrim, "$1" );
	var elements, matcher, i, len, elem, token,
		type, findContext, notTokens,
		match = selector.match( rgroups ),
		tokens = selector.match( rtokens ),
		contextNodeType = context.nodeType;

	// POS handling
	if ( matchExpr["POS"].test(selector) ) {
		return handlePOS( selector, context, results, seed, match );
	}

	if ( seed ) {
		elements = slice.call( seed, 0 );

	// To maintain document order, only narrow the
	// set if there is one group
	} else if ( match && match.length === 1 ) {

		// Take a shortcut and set the context if the root selector is an ID
		if ( tokens.length > 1 && contextNodeType === 9 && !xml &&
				(match = matchExpr["ID"].exec( tokens[0] )) ) {

			context = Expr.find["ID"]( match[1], context, xml )[0];
			if ( !context ) {
				return results;
			}

			selector = selector.slice( tokens.shift().length );
		}

		findContext = ( (match = rsibling.exec( tokens[0] )) && !match.index && context.parentNode ) || context;

		// Get the last token, excluding :not
		notTokens = tokens.pop();
		token = notTokens.split(":not")[0];

		for ( i = 0, len = Expr.order.length; i < len; i++ ) {
			type = Expr.order[i];

			if ( (match = matchExpr[ type ].exec( token )) ) {
				elements = Expr.find[ type ]( (match[1] || "").replace( rbackslash, "" ), findContext, xml );

				if ( elements == null ) {
					continue;
				}

				if ( token === notTokens ) {
					selector = selector.slice( 0, selector.length - notTokens.length ) +
						token.replace( matchExpr[ type ], "" );

					if ( !selector ) {
						push.apply( results, slice.call(elements, 0) );
					}
				}
				break;
			}
		}
	}

	// Only loop over the given elements once
	// If selector is empty, we're already done
	if ( selector ) {
		matcher = compile( selector, context, xml );
		dirruns = matcher.dirruns++;

		if ( elements == null ) {
			elements = Expr.find["TAG"]( "*", (rsibling.test( selector ) && context.parentNode) || context );
		}
		for ( i = 0; (elem = elements[i]); i++ ) {
			cachedruns = matcher.runs++;
			if ( matcher(elem, context) ) {
				results.push( elem );
			}
		}
	}

	return results;
};

if ( document.querySelectorAll ) {
	(function() {
		var disconnectedMatch,
			oldSelect = select,
			rescape = /'|\\/g,
			rattributeQuotes = /\=[\x20\t\r\n\f]*([^'"\]]*)[\x20\t\r\n\f]*\]/g,
			rbuggyQSA = [],
			// matchesSelector(:active) reports false when true (IE9/Opera 11.5)
			// A support test would require too much code (would include document ready)
			// just skip matchesSelector for :active
			rbuggyMatches = [":active"],
			matches = docElem.matchesSelector ||
				docElem.mozMatchesSelector ||
				docElem.webkitMatchesSelector ||
				docElem.oMatchesSelector ||
				docElem.msMatchesSelector;

		// Build QSA regex
		// Regex strategy adopted from Diego Perini
		assert(function( div ) {
			div.innerHTML = "<select><option selected></option></select>";

			// IE8 - Some boolean attributes are not treated correctly
			if ( !div.querySelectorAll("[selected]").length ) {
				rbuggyQSA.push( "\\[" + whitespace + "*(?:checked|disabled|ismap|multiple|readonly|selected|value)" );
			}

			// Webkit/Opera - :checked should return selected option elements
			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
			// IE8 throws error here (do not put tests after this one)
			if ( !div.querySelectorAll(":checked").length ) {
				rbuggyQSA.push(":checked");
			}
		});

		assert(function( div ) {

			// Opera 10-12/IE9 - ^= $= *= and empty values
			// Should not select anything
			div.innerHTML = "<p test=''></p>";
			if ( div.querySelectorAll("[test^='']").length ) {
				rbuggyQSA.push( "[*^$]=" + whitespace + "*(?:\"\"|'')" );
			}

			// FF 3.5 - :enabled/:disabled and hidden elements (hidden elements are still enabled)
			// IE8 throws error here (do not put tests after this one)
			div.innerHTML = "<input type='hidden'>";
			if ( !div.querySelectorAll(":enabled").length ) {
				rbuggyQSA.push(":enabled", ":disabled");
			}
		});

		rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join("|") );

		select = function( selector, context, results, seed, xml ) {
			// Only use querySelectorAll when not filtering,
			// when this is not xml,
			// and when no QSA bugs apply
			if ( !seed && !xml && (!rbuggyQSA || !rbuggyQSA.test( selector )) ) {
				if ( context.nodeType === 9 ) {
					try {
						push.apply( results, slice.call(context.querySelectorAll( selector ), 0) );
						return results;
					} catch(qsaError) {}
				// qSA works strangely on Element-rooted queries
				// We can work around this by specifying an extra ID on the root
				// and working up from there (Thanks to Andrew Dupont for the technique)
				// IE 8 doesn't work on object elements
				} else if ( context.nodeType === 1 && context.nodeName.toLowerCase() !== "object" ) {
					var old = context.getAttribute("id"),
						nid = old || expando,
						newContext = rsibling.test( selector ) && context.parentNode || context;

					if ( old ) {
						nid = nid.replace( rescape, "\\$&" );
					} else {
						context.setAttribute( "id", nid );
					}

					try {
						push.apply( results, slice.call( newContext.querySelectorAll(
							selector.replace( rgroups, "[id='" + nid + "'] $&" )
						), 0 ) );
						return results;
					} catch(qsaError) {
					} finally {
						if ( !old ) {
							context.removeAttribute("id");
						}
					}
				}
			}

			return oldSelect( selector, context, results, seed, xml );
		};

		if ( matches ) {
			assert(function( div ) {
				// Check to see if it's possible to do matchesSelector
				// on a disconnected node (IE 9)
				disconnectedMatch = matches.call( div, "div" );

				// This should fail with an exception
				// Gecko does not error, returns false instead
				try {
					matches.call( div, "[test!='']:sizzle" );
					rbuggyMatches.push( Expr.match.PSEUDO );
				} catch ( e ) {}
			});

			// rbuggyMatches always contains :active, so no need for a length check
			rbuggyMatches = /* rbuggyMatches.length && */ new RegExp( rbuggyMatches.join("|") );

			Sizzle.matchesSelector = function( elem, expr ) {
				// Make sure that attribute selectors are quoted
				expr = expr.replace( rattributeQuotes, "='$1']" );

				// rbuggyMatches always contains :active, so no need for an existence check
				if ( !isXML( elem ) && !rbuggyMatches.test( expr ) && (!rbuggyQSA || !rbuggyQSA.test( expr )) ) {
					try {
						var ret = matches.call( elem, expr );

						// IE 9's matchesSelector returns false on disconnected nodes
						if ( ret || disconnectedMatch ||
								// As well, disconnected nodes are said to be in a document
								// fragment in IE 9
								elem.document && elem.document.nodeType !== 11 ) {
							return ret;
						}
					} catch(e) {}
				}

				return Sizzle( expr, null, null, [ elem ] ).length > 0;
			};
		}
	})();
}

// Override sizzle attribute retrieval
Sizzle.attr = jQuery.attr;
jQuery.find = Sizzle;
jQuery.expr = Sizzle.selectors;
jQuery.expr[":"] = jQuery.expr.pseudos;
jQuery.unique = Sizzle.uniqueSort;
jQuery.text = Sizzle.getText;
jQuery.isXMLDoc = Sizzle.isXML;
jQuery.contains = Sizzle.contains;


})( window );
var runtil = /Until$/,
	rparentsprev = /^(?:parents|prev(?:Until|All))/,
	isSimple = /^.[^:#\[\.,]*$/,
	rneedsContext = jQuery.expr.match.needsContext,
	// methods guaranteed to produce a unique set when starting from a unique set
	guaranteedUnique = {
		children: true,
		contents: true,
		next: true,
		prev: true
	};

jQuery.fn.extend({
	find: function( selector ) {
		var i, l, length, n, r, ret,
			self = this;

		if ( typeof selector !== "string" ) {
			return jQuery( selector ).filter(function() {
				for ( i = 0, l = self.length; i < l; i++ ) {
					if ( jQuery.contains( self[ i ], this ) ) {
						return true;
					}
				}
			});
		}

		ret = this.pushStack( "", "find", selector );

		for ( i = 0, l = this.length; i < l; i++ ) {
			length = ret.length;
			jQuery.find( selector, this[i], ret );

			if ( i > 0 ) {
				// Make sure that the results are unique
				for ( n = length; n < ret.length; n++ ) {
					for ( r = 0; r < length; r++ ) {
						if ( ret[r] === ret[n] ) {
							ret.splice(n--, 1);
							break;
						}
					}
				}
			}
		}

		return ret;
	},

	has: function( target ) {
		var i,
			targets = jQuery( target, this ),
			len = targets.length;

		return this.filter(function() {
			for ( i = 0; i < len; i++ ) {
				if ( jQuery.contains( this, targets[i] ) ) {
					return true;
				}
			}
		});
	},

	not: function( selector ) {
		return this.pushStack( winnow(this, selector, false), "not", selector);
	},

	filter: function( selector ) {
		return this.pushStack( winnow(this, selector, true), "filter", selector );
	},

	is: function( selector ) {
		return !!selector && (
			typeof selector === "string" ?
				// If this is a positional/relative selector, check membership in the returned set
				// so $("p:first").is("p:last") won't return true for a doc with two "p".
				rneedsContext.test( selector ) ?
					jQuery( selector, this.context ).index( this[0] ) >= 0 :
					jQuery.filter( selector, this ).length > 0 :
				this.filter( selector ).length > 0 );
	},

	closest: function( selectors, context ) {
		var cur,
			i = 0,
			l = this.length,
			ret = [],
			pos = rneedsContext.test( selectors ) || typeof selectors !== "string" ?
				jQuery( selectors, context || this.context ) :
				0;

		for ( ; i < l; i++ ) {
			cur = this[i];

			while ( cur && cur.ownerDocument && cur !== context && cur.nodeType !== 11 ) {
				if ( pos ? pos.index(cur) > -1 : jQuery.find.matchesSelector(cur, selectors) ) {
					ret.push( cur );
					break;
				}
				cur = cur.parentNode;
			}
		}

		ret = ret.length > 1 ? jQuery.unique( ret ) : ret;

		return this.pushStack( ret, "closest", selectors );
	},

	// Determine the position of an element within
	// the matched set of elements
	index: function( elem ) {

		// No argument, return index in parent
		if ( !elem ) {
			return ( this[0] && this[0].parentNode ) ? this.prevAll().length : -1;
		}

		// index in selector
		if ( typeof elem === "string" ) {
			return jQuery.inArray( this[0], jQuery( elem ) );
		}

		// Locate the position of the desired element
		return jQuery.inArray(
			// If it receives a jQuery object, the first element is used
			elem.jquery ? elem[0] : elem, this );
	},

	add: function( selector, context ) {
		var set = typeof selector === "string" ?
				jQuery( selector, context ) :
				jQuery.makeArray( selector && selector.nodeType ? [ selector ] : selector ),
			all = jQuery.merge( this.get(), set );

		return this.pushStack( isDisconnected( set[0] ) || isDisconnected( all[0] ) ?
			all :
			jQuery.unique( all ) );
	},

	addBack: function( selector ) {
		return this.add( selector == null ?
			this.prevObject : this.prevObject.filter(selector)
		);
	}
});

jQuery.fn.andSelf = jQuery.fn.addBack;

// A painfully simple check to see if an element is disconnected
// from a document (should be improved, where feasible).
function isDisconnected( node ) {
	return !node || !node.parentNode || node.parentNode.nodeType === 11;
}

function sibling( cur, dir ) {
	do {
		cur = cur[ dir ];
	} while ( cur && cur.nodeType !== 1 );

	return cur;
}

jQuery.each({
	parent: function( elem ) {
		var parent = elem.parentNode;
		return parent && parent.nodeType !== 11 ? parent : null;
	},
	parents: function( elem ) {
		return jQuery.dir( elem, "parentNode" );
	},
	parentsUntil: function( elem, i, until ) {
		return jQuery.dir( elem, "parentNode", until );
	},
	next: function( elem ) {
		return sibling( elem, "nextSibling" );
	},
	prev: function( elem ) {
		return sibling( elem, "previousSibling" );
	},
	nextAll: function( elem ) {
		return jQuery.dir( elem, "nextSibling" );
	},
	prevAll: function( elem ) {
		return jQuery.dir( elem, "previousSibling" );
	},
	nextUntil: function( elem, i, until ) {
		return jQuery.dir( elem, "nextSibling", until );
	},
	prevUntil: function( elem, i, until ) {
		return jQuery.dir( elem, "previousSibling", until );
	},
	siblings: function( elem ) {
		return jQuery.sibling( ( elem.parentNode || {} ).firstChild, elem );
	},
	children: function( elem ) {
		return jQuery.sibling( elem.firstChild );
	},
	contents: function( elem ) {
		return jQuery.nodeName( elem, "iframe" ) ?
			elem.contentDocument || elem.contentWindow.document :
			jQuery.merge( [], elem.childNodes );
	}
}, function( name, fn ) {
	jQuery.fn[ name ] = function( until, selector ) {
		var ret = jQuery.map( this, fn, until );

		if ( !runtil.test( name ) ) {
			selector = until;
		}

		if ( selector && typeof selector === "string" ) {
			ret = jQuery.filter( selector, ret );
		}

		ret = this.length > 1 && !guaranteedUnique[ name ] ? jQuery.unique( ret ) : ret;

		if ( this.length > 1 && rparentsprev.test( name ) ) {
			ret = ret.reverse();
		}

		return this.pushStack( ret, name, core_slice.call( arguments ).join(",") );
	};
});

jQuery.extend({
	filter: function( expr, elems, not ) {
		if ( not ) {
			expr = ":not(" + expr + ")";
		}

		return elems.length === 1 ?
			jQuery.find.matchesSelector(elems[0], expr) ? [ elems[0] ] : [] :
			jQuery.find.matches(expr, elems);
	},

	dir: function( elem, dir, until ) {
		var matched = [],
			cur = elem[ dir ];

		while ( cur && cur.nodeType !== 9 && (until === undefined || cur.nodeType !== 1 || !jQuery( cur ).is( until )) ) {
			if ( cur.nodeType === 1 ) {
				matched.push( cur );
			}
			cur = cur[dir];
		}
		return matched;
	},

	sibling: function( n, elem ) {
		var r = [];

		for ( ; n; n = n.nextSibling ) {
			if ( n.nodeType === 1 && n !== elem ) {
				r.push( n );
			}
		}

		return r;
	}
});

// Implement the identical functionality for filter and not
function winnow( elements, qualifier, keep ) {

	// Can't pass null or undefined to indexOf in Firefox 4
	// Set to 0 to skip string check
	qualifier = qualifier || 0;

	if ( jQuery.isFunction( qualifier ) ) {
		return jQuery.grep(elements, function( elem, i ) {
			var retVal = !!qualifier.call( elem, i, elem );
			return retVal === keep;
		});

	} else if ( qualifier.nodeType ) {
		return jQuery.grep(elements, function( elem, i ) {
			return ( elem === qualifier ) === keep;
		});

	} else if ( typeof qualifier === "string" ) {
		var filtered = jQuery.grep(elements, function( elem ) {
			return elem.nodeType === 1;
		});

		if ( isSimple.test( qualifier ) ) {
			return jQuery.filter(qualifier, filtered, !keep);
		} else {
			qualifier = jQuery.filter( qualifier, filtered );
		}
	}

	return jQuery.grep(elements, function( elem, i ) {
		return ( jQuery.inArray( elem, qualifier ) >= 0 ) === keep;
	});
}
function createSafeFragment( document ) {
	var list = nodeNames.split( "|" ),
	safeFrag = document.createDocumentFragment();

	if ( safeFrag.createElement ) {
		while ( list.length ) {
			safeFrag.createElement(
				list.pop()
			);
		}
	}
	return safeFrag;
}

var nodeNames = "abbr|article|aside|audio|bdi|canvas|data|datalist|details|figcaption|figure|footer|" +
		"header|hgroup|mark|meter|nav|output|progress|section|summary|time|video",
	rinlinejQuery = / jQuery\d+="(?:null|\d+)"/g,
	rleadingWhitespace = /^\s+/,
	rxhtmlTag = /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([\w:]+)[^>]*)\/>/gi,
	rtagName = /<([\w:]+)/,
	rtbody = /<tbody/i,
	rhtml = /<|&#?\w+;/,
	rnoInnerhtml = /<(?:script|style|link)/i,
	rnocache = /<(?:script|object|embed|option|style)/i,
	rnoshimcache = new RegExp("<(?:" + nodeNames + ")[\\s/>]", "i"),
	rcheckableType = /^(?:checkbox|radio)$/,
	// checked="checked" or checked
	rchecked = /checked\s*(?:[^=]|=\s*.checked.)/i,
	rscriptType = /\/(java|ecma)script/i,
	rcleanScript = /^\s*<!(?:\[CDATA\[|\-\-)|[\]\-]{2}>\s*$/g,
	wrapMap = {
		option: [ 1, "<select multiple='multiple'>", "</select>" ],
		legend: [ 1, "<fieldset>", "</fieldset>" ],
		thead: [ 1, "<table>", "</table>" ],
		tr: [ 2, "<table><tbody>", "</tbody></table>" ],
		td: [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ],
		col: [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>" ],
		area: [ 1, "<map>", "</map>" ],
		_default: [ 0, "", "" ]
	},
	safeFragment = createSafeFragment( document ),
	fragmentDiv = safeFragment.appendChild( document.createElement("div") );

wrapMap.optgroup = wrapMap.option;
wrapMap.tbody = wrapMap.tfoot = wrapMap.colgroup = wrapMap.caption = wrapMap.thead;
wrapMap.th = wrapMap.td;

// IE6-8 can't serialize link, script, style, or any html5 (NoScope) tags,
// unless wrapped in a div with non-breaking characters in front of it.
if ( !jQuery.support.htmlSerialize ) {
	wrapMap._default = [ 1, "X<div>", "</div>" ];
}

jQuery.fn.extend({
	text: function( value ) {
		return jQuery.access( this, function( value ) {
			return value === undefined ?
				jQuery.text( this ) :
				this.empty().append( ( this[0] && this[0].ownerDocument || document ).createTextNode( value ) );
		}, null, value, arguments.length );
	},

	wrapAll: function( html ) {
		if ( jQuery.isFunction( html ) ) {
			return this.each(function(i) {
				jQuery(this).wrapAll( html.call(this, i) );
			});
		}

		if ( this[0] ) {
			// The elements to wrap the target around
			var wrap = jQuery( html, this[0].ownerDocument ).eq(0).clone(true);

			if ( this[0].parentNode ) {
				wrap.insertBefore( this[0] );
			}

			wrap.map(function() {
				var elem = this;

				while ( elem.firstChild && elem.firstChild.nodeType === 1 ) {
					elem = elem.firstChild;
				}

				return elem;
			}).append( this );
		}

		return this;
	},

	wrapInner: function( html ) {
		if ( jQuery.isFunction( html ) ) {
			return this.each(function(i) {
				jQuery(this).wrapInner( html.call(this, i) );
			});
		}

		return this.each(function() {
			var self = jQuery( this ),
				contents = self.contents();

			if ( contents.length ) {
				contents.wrapAll( html );

			} else {
				self.append( html );
			}
		});
	},

	wrap: function( html ) {
		var isFunction = jQuery.isFunction( html );

		return this.each(function(i) {
			jQuery( this ).wrapAll( isFunction ? html.call(this, i) : html );
		});
	},

	unwrap: function() {
		return this.parent().each(function() {
			if ( !jQuery.nodeName( this, "body" ) ) {
				jQuery( this ).replaceWith( this.childNodes );
			}
		}).end();
	},

	append: function() {
		return this.domManip(arguments, true, function( elem ) {
			if ( this.nodeType === 1 || this.nodeType === 11 ) {
				this.appendChild( elem );
			}
		});
	},

	prepend: function() {
		return this.domManip(arguments, true, function( elem ) {
			if ( this.nodeType === 1 || this.nodeType === 11 ) {
				this.insertBefore( elem, this.firstChild );
			}
		});
	},

	before: function() {
		if ( !isDisconnected( this[0] ) ) {
			return this.domManip(arguments, false, function( elem ) {
				this.parentNode.insertBefore( elem, this );
			});
		}

		if ( arguments.length ) {
			var set = jQuery.clean( arguments );
			return this.pushStack( jQuery.merge( set, this ), "before", this.selector );
		}
	},

	after: function() {
		if ( !isDisconnected( this[0] ) ) {
			return this.domManip(arguments, false, function( elem ) {
				this.parentNode.insertBefore( elem, this.nextSibling );
			});
		}

		if ( arguments.length ) {
			var set = jQuery.clean( arguments );
			return this.pushStack( jQuery.merge( this, set ), "after", this.selector );
		}
	},

	// keepData is for internal use only--do not document
	remove: function( selector, keepData ) {
		var elem,
			i = 0;

		for ( ; (elem = this[i]) != null; i++ ) {
			if ( !selector || jQuery.filter( selector, [ elem ] ).length ) {
				if ( !keepData && elem.nodeType === 1 ) {
					jQuery.cleanData( elem.getElementsByTagName("*") );
					jQuery.cleanData( [ elem ] );
				}

				if ( elem.parentNode ) {
					elem.parentNode.removeChild( elem );
				}
			}
		}

		return this;
	},

	empty: function() {
		var elem,
			i = 0;

		for ( ; (elem = this[i]) != null; i++ ) {
			// Remove element nodes and prevent memory leaks
			if ( elem.nodeType === 1 ) {
				jQuery.cleanData( elem.getElementsByTagName("*") );
			}

			// Remove any remaining nodes
			while ( elem.firstChild ) {
				elem.removeChild( elem.firstChild );
			}
		}

		return this;
	},

	clone: function( dataAndEvents, deepDataAndEvents ) {
		dataAndEvents = dataAndEvents == null ? false : dataAndEvents;
		deepDataAndEvents = deepDataAndEvents == null ? dataAndEvents : deepDataAndEvents;

		return this.map( function () {
			return jQuery.clone( this, dataAndEvents, deepDataAndEvents );
		});
	},

	html: function( value ) {
		return jQuery.access( this, function( value ) {
			var elem = this[0] || {},
				i = 0,
				l = this.length;

			if ( value === undefined ) {
				return elem.nodeType === 1 ?
					elem.innerHTML.replace( rinlinejQuery, "" ) :
					undefined;
			}

			// See if we can take a shortcut and just use innerHTML
			if ( typeof value === "string" && !rnoInnerhtml.test( value ) &&
				( jQuery.support.htmlSerialize || !rnoshimcache.test( value )  ) &&
				( jQuery.support.leadingWhitespace || !rleadingWhitespace.test( value ) ) &&
				!wrapMap[ ( rtagName.exec( value ) || ["", ""] )[1].toLowerCase() ] ) {

				value = value.replace( rxhtmlTag, "<$1></$2>" );

				try {
					for (; i < l; i++ ) {
						// Remove element nodes and prevent memory leaks
						elem = this[i] || {};
						if ( elem.nodeType === 1 ) {
							jQuery.cleanData( elem.getElementsByTagName( "*" ) );
							elem.innerHTML = value;
						}
					}

					elem = 0;

				// If using innerHTML throws an exception, use the fallback method
				} catch(e) {}
			}

			if ( elem ) {
				this.empty().append( value );
			}
		}, null, value, arguments.length );
	},

	replaceWith: function( value ) {
		if ( !isDisconnected( this[0] ) ) {
			// Make sure that the elements are removed from the DOM before they are inserted
			// this can help fix replacing a parent with child elements
			if ( jQuery.isFunction( value ) ) {
				return this.each(function(i) {
					var self = jQuery(this), old = self.html();
					self.replaceWith( value.call( this, i, old ) );
				});
			}

			if ( typeof value !== "string" ) {
				value = jQuery( value ).detach();
			}

			return this.each(function() {
				var next = this.nextSibling,
					parent = this.parentNode;

				jQuery( this ).remove();

				if ( next ) {
					jQuery(next).before( value );
				} else {
					jQuery(parent).append( value );
				}
			});
		}

		return this.length ?
			this.pushStack( jQuery(jQuery.isFunction(value) ? value() : value), "replaceWith", value ) :
			this;
	},

	detach: function( selector ) {
		return this.remove( selector, true );
	},

	domManip: function( args, table, callback ) {

		// Flatten any nested arrays
		args = [].concat.apply( [], args );

		var results, first, fragment, iNoClone,
			i = 0,
			value = args[0],
			scripts = [],
			l = this.length;

		// We can't cloneNode fragments that contain checked, in WebKit
		if ( !jQuery.support.checkClone && l > 1 && typeof value === "string" && rchecked.test( value ) ) {
			return this.each(function() {
				jQuery(this).domManip( args, table, callback );
			});
		}

		if ( jQuery.isFunction(value) ) {
			return this.each(function(i) {
				var self = jQuery(this);
				args[0] = value.call( this, i, table ? self.html() : undefined );
				self.domManip( args, table, callback );
			});
		}

		if ( this[0] ) {
			results = jQuery.buildFragment( args, this, scripts );
			fragment = results.fragment;
			first = fragment.firstChild;

			if ( fragment.childNodes.length === 1 ) {
				fragment = first;
			}

			if ( first ) {
				table = table && jQuery.nodeName( first, "tr" );

				// Use the original fragment for the last item instead of the first because it can end up
				// being emptied incorrectly in certain situations (#8070).
				// Fragments from the fragment cache must always be cloned and never used in place.
				for ( iNoClone = results.cacheable || l - 1; i < l; i++ ) {
					callback.call(
						table && jQuery.nodeName( this[i], "table" ) ?
							findOrAppend( this[i], "tbody" ) :
							this[i],
						i === iNoClone ?
							fragment :
							jQuery.clone( fragment, true, true )
					);
				}
			}

			// Fix #11809: Avoid leaking memory
			fragment = first = null;

			if ( scripts.length ) {
				jQuery.each( scripts, function( i, elem ) {
					if ( elem.src ) {
						if ( jQuery.ajax ) {
							jQuery.ajax({
								url: elem.src,
								type: "GET",
								dataType: "script",
								async: false,
								global: false,
								"throws": true
							});
						} else {
							jQuery.error("no ajax");
						}
					} else {
						jQuery.globalEval( ( elem.text || elem.textContent || elem.innerHTML || "" ).replace( rcleanScript, "" ) );
					}

					if ( elem.parentNode ) {
						elem.parentNode.removeChild( elem );
					}
				});
			}
		}

		return this;
	}
});

function findOrAppend( elem, tag ) {
	return elem.getElementsByTagName( tag )[0] || elem.appendChild( elem.ownerDocument.createElement( tag ) );
}

function cloneCopyEvent( src, dest ) {

	if ( dest.nodeType !== 1 || !jQuery.hasData( src ) ) {
		return;
	}

	var type, i, l,
		oldData = jQuery._data( src ),
		curData = jQuery._data( dest, oldData ),
		events = oldData.events;

	if ( events ) {
		delete curData.handle;
		curData.events = {};

		for ( type in events ) {
			for ( i = 0, l = events[ type ].length; i < l; i++ ) {
				jQuery.event.add( dest, type, events[ type ][ i ] );
			}
		}
	}

	// make the cloned public data object a copy from the original
	if ( curData.data ) {
		curData.data = jQuery.extend( {}, curData.data );
	}
}

function cloneFixAttributes( src, dest ) {
	var nodeName;

	// We do not need to do anything for non-Elements
	if ( dest.nodeType !== 1 ) {
		return;
	}

	// clearAttributes removes the attributes, which we don't want,
	// but also removes the attachEvent events, which we *do* want
	if ( dest.clearAttributes ) {
		dest.clearAttributes();
	}

	// mergeAttributes, in contrast, only merges back on the
	// original attributes, not the events
	if ( dest.mergeAttributes ) {
		dest.mergeAttributes( src );
	}

	nodeName = dest.nodeName.toLowerCase();

	if ( nodeName === "object" ) {
		// IE6-10 improperly clones children of object elements using classid.
		// IE10 throws NoModificationAllowedError if parent is null, #12132.
		if ( dest.parentNode ) {
			dest.outerHTML = src.outerHTML;
		}

		// This path appears unavoidable for IE9. When cloning an object
		// element in IE9, the outerHTML strategy above is not sufficient.
		// If the src has innerHTML and the destination does not,
		// copy the src.innerHTML into the dest.innerHTML. #10324
		if ( jQuery.support.html5Clone && (src.innerHTML && !jQuery.trim(dest.innerHTML)) ) {
			dest.innerHTML = src.innerHTML;
		}

	} else if ( nodeName === "input" && rcheckableType.test( src.type ) ) {
		// IE6-8 fails to persist the checked state of a cloned checkbox
		// or radio button. Worse, IE6-7 fail to give the cloned element
		// a checked appearance if the defaultChecked value isn't also set

		dest.defaultChecked = dest.checked = src.checked;

		// IE6-7 get confused and end up setting the value of a cloned
		// checkbox/radio button to an empty string instead of "on"
		if ( dest.value !== src.value ) {
			dest.value = src.value;
		}

	// IE6-8 fails to return the selected option to the default selected
	// state when cloning options
	} else if ( nodeName === "option" ) {
		dest.selected = src.defaultSelected;

	// IE6-8 fails to set the defaultValue to the correct value when
	// cloning other types of input fields
	} else if ( nodeName === "input" || nodeName === "textarea" ) {
		dest.defaultValue = src.defaultValue;

	// IE blanks contents when cloning scripts
	} else if ( nodeName === "script" && dest.text !== src.text ) {
		dest.text = src.text;
	}

	// Event data gets referenced instead of copied if the expando
	// gets copied too
	dest.removeAttribute( jQuery.expando );
}

jQuery.buildFragment = function( args, context, scripts ) {
	var fragment, cacheable, cachehit,
		first = args[ 0 ];

	// Set context from what may come in as undefined or a jQuery collection or a node
	context = context || document;
	context = (context[0] || context).ownerDocument || context[0] || context;

	// Ensure that an attr object doesn't incorrectly stand in as a document object
	// Chrome and Firefox seem to allow this to occur and will throw exception
	// Fixes #8950
	if ( typeof context.createDocumentFragment === "undefined" ) {
		context = document;
	}

	// Only cache "small" (1/2 KB) HTML strings that are associated with the main document
	// Cloning options loses the selected state, so don't cache them
	// IE 6 doesn't like it when you put <object> or <embed> elements in a fragment
	// Also, WebKit does not clone 'checked' attributes on cloneNode, so don't cache
	// Lastly, IE6,7,8 will not correctly reuse cached fragments that were created from unknown elems #10501
	if ( args.length === 1 && typeof first === "string" && first.length < 512 && context === document &&
		first.charAt(0) === "<" && !rnocache.test( first ) &&
		(jQuery.support.checkClone || !rchecked.test( first )) &&
		(jQuery.support.html5Clone || !rnoshimcache.test( first )) ) {

		// Mark cacheable and look for a hit
		cacheable = true;
		fragment = jQuery.fragments[ first ];
		cachehit = fragment !== undefined;
	}

	if ( !fragment ) {
		fragment = context.createDocumentFragment();
		jQuery.clean( args, context, fragment, scripts );

		// Update the cache, but only store false
		// unless this is a second parsing of the same content
		if ( cacheable ) {
			jQuery.fragments[ first ] = cachehit && fragment;
		}
	}

	return { fragment: fragment, cacheable: cacheable };
};

jQuery.fragments = {};

jQuery.each({
	appendTo: "append",
	prependTo: "prepend",
	insertBefore: "before",
	insertAfter: "after",
	replaceAll: "replaceWith"
}, function( name, original ) {
	jQuery.fn[ name ] = function( selector ) {
		var elems,
			i = 0,
			ret = [],
			insert = jQuery( selector ),
			l = insert.length,
			parent = this.length === 1 && this[0].parentNode;

		if ( (parent == null || parent && parent.nodeType === 11 && parent.childNodes.length === 1) && l === 1 ) {
			insert[ original ]( this[0] );
			return this;
		} else {
			for ( ; i < l; i++ ) {
				elems = ( i > 0 ? this.clone(true) : this ).get();
				jQuery( insert[i] )[ original ]( elems );
				ret = ret.concat( elems );
			}

			return this.pushStack( ret, name, insert.selector );
		}
	};
});

function getAll( elem ) {
	if ( typeof elem.getElementsByTagName !== "undefined" ) {
		return elem.getElementsByTagName( "*" );

	} else if ( typeof elem.querySelectorAll !== "undefined" ) {
		return elem.querySelectorAll( "*" );

	} else {
		return [];
	}
}

// Used in clean, fixes the defaultChecked property
function fixDefaultChecked( elem ) {
	if ( rcheckableType.test( elem.type ) ) {
		elem.defaultChecked = elem.checked;
	}
}

jQuery.extend({
	clone: function( elem, dataAndEvents, deepDataAndEvents ) {
		var srcElements,
			destElements,
			i,
			clone;

		if ( jQuery.support.html5Clone || jQuery.isXMLDoc(elem) || !rnoshimcache.test( "<" + elem.nodeName + ">" ) ) {
			clone = elem.cloneNode( true );

		// IE<=8 does not properly clone detached, unknown element nodes
		} else {
			fragmentDiv.innerHTML = elem.outerHTML;
			fragmentDiv.removeChild( clone = fragmentDiv.firstChild );
		}

		if ( (!jQuery.support.noCloneEvent || !jQuery.support.noCloneChecked) &&
				(elem.nodeType === 1 || elem.nodeType === 11) && !jQuery.isXMLDoc(elem) ) {
			// IE copies events bound via attachEvent when using cloneNode.
			// Calling detachEvent on the clone will also remove the events
			// from the original. In order to get around this, we use some
			// proprietary methods to clear the events. Thanks to MooTools
			// guys for this hotness.

			cloneFixAttributes( elem, clone );

			// Using Sizzle here is crazy slow, so we use getElementsByTagName instead
			srcElements = getAll( elem );
			destElements = getAll( clone );

			// Weird iteration because IE will replace the length property
			// with an element if you are cloning the body and one of the
			// elements on the page has a name or id of "length"
			for ( i = 0; srcElements[i]; ++i ) {
				// Ensure that the destination node is not null; Fixes #9587
				if ( destElements[i] ) {
					cloneFixAttributes( srcElements[i], destElements[i] );
				}
			}
		}

		// Copy the events from the original to the clone
		if ( dataAndEvents ) {
			cloneCopyEvent( elem, clone );

			if ( deepDataAndEvents ) {
				srcElements = getAll( elem );
				destElements = getAll( clone );

				for ( i = 0; srcElements[i]; ++i ) {
					cloneCopyEvent( srcElements[i], destElements[i] );
				}
			}
		}

		srcElements = destElements = null;

		// Return the cloned set
		return clone;
	},

	clean: function( elems, context, fragment, scripts ) {
		var j, safe, elem, tag, wrap, depth, div, hasBody, tbody, len, handleScript, jsTags,
			i = 0,
			ret = [];

		// Ensure that context is a document
		if ( !context || typeof context.createDocumentFragment === "undefined" ) {
			context = document;
		}

		// Use the already-created safe fragment if context permits
		for ( safe = context === document && safeFragment; (elem = elems[i]) != null; i++ ) {
			if ( typeof elem === "number" ) {
				elem += "";
			}

			if ( !elem ) {
				continue;
			}

			// Convert html string into DOM nodes
			if ( typeof elem === "string" ) {
				if ( !rhtml.test( elem ) ) {
					elem = context.createTextNode( elem );
				} else {
					// Ensure a safe container in which to render the html
					safe = safe || createSafeFragment( context );
					div = div || safe.appendChild( context.createElement("div") );

					// Fix "XHTML"-style tags in all browsers
					elem = elem.replace(rxhtmlTag, "<$1></$2>");

					// Go to html and back, then peel off extra wrappers
					tag = ( rtagName.exec( elem ) || ["", ""] )[1].toLowerCase();
					wrap = wrapMap[ tag ] || wrapMap._default;
					depth = wrap[0];
					div.innerHTML = wrap[1] + elem + wrap[2];

					// Move to the right depth
					while ( depth-- ) {
						div = div.lastChild;
					}

					// Remove IE's autoinserted <tbody> from table fragments
					if ( !jQuery.support.tbody ) {

						// String was a <table>, *may* have spurious <tbody>
						hasBody = rtbody.test(elem);
							tbody = tag === "table" && !hasBody ?
								div.firstChild && div.firstChild.childNodes :

								// String was a bare <thead> or <tfoot>
								wrap[1] === "<table>" && !hasBody ?
									div.childNodes :
									[];

						for ( j = tbody.length - 1; j >= 0 ; --j ) {
							if ( jQuery.nodeName( tbody[ j ], "tbody" ) && !tbody[ j ].childNodes.length ) {
								tbody[ j ].parentNode.removeChild( tbody[ j ] );
							}
						}
					}

					// IE completely kills leading whitespace when innerHTML is used
					if ( !jQuery.support.leadingWhitespace && rleadingWhitespace.test( elem ) ) {
						div.insertBefore( context.createTextNode( rleadingWhitespace.exec(elem)[0] ), div.firstChild );
					}

					elem = div.childNodes;

					// Remember the top-level container for proper cleanup
					div = safe.lastChild;
				}
			}

			if ( elem.nodeType ) {
				ret.push( elem );
			} else {
				ret = jQuery.merge( ret, elem );
			}
		}

		// Fix #11356: Clear elements from safeFragment
		if ( div ) {
			safe.removeChild( div );
			elem = div = safe = null;
		}

		// Reset defaultChecked for any radios and checkboxes
		// about to be appended to the DOM in IE 6/7 (#8060)
		if ( !jQuery.support.appendChecked ) {
			for ( i = 0; (elem = ret[i]) != null; i++ ) {
				if ( jQuery.nodeName( elem, "input" ) ) {
					fixDefaultChecked( elem );
				} else if ( typeof elem.getElementsByTagName !== "undefined" ) {
					jQuery.grep( elem.getElementsByTagName("input"), fixDefaultChecked );
				}
			}
		}

		// Append elements to a provided document fragment
		if ( fragment ) {
			// Special handling of each script element
			handleScript = function( elem ) {
				// Check if we consider it executable
				if ( !elem.type || rscriptType.test( elem.type ) ) {
					// Detach the script and store it in the scripts array (if provided) or the fragment
					// Return truthy to indicate that it has been handled
					return scripts ?
						scripts.push( elem.parentNode ? elem.parentNode.removeChild( elem ) : elem ) :
						fragment.appendChild( elem );
				}
			};

			for ( i = 0; (elem = ret[i]) != null; i++ ) {
				// Check if we're done after handling an executable script
				if ( !( jQuery.nodeName( elem, "script" ) && handleScript( elem ) ) ) {
					// Append to fragment and handle embedded scripts
					fragment.appendChild( elem );
					if ( typeof elem.getElementsByTagName !== "undefined" ) {
						// handleScript alters the DOM, so use jQuery.merge to ensure snapshot iteration
						jsTags = jQuery.grep( jQuery.merge( [], elem.getElementsByTagName("script") ), handleScript );

						// Splice the scripts into ret after their former ancestor and advance our index beyond them
						ret.splice.apply( ret, [i + 1, 0].concat( jsTags ) );
						i += jsTags.length;
					}
				}
			}
		}

		return ret;
	},

	cleanData: function( elems, /* internal */ acceptData ) {
		var data, id, elem, type,
			i = 0,
			internalKey = jQuery.expando,
			cache = jQuery.cache,
			deleteExpando = jQuery.support.deleteExpando,
			special = jQuery.event.special;

		for ( ; (elem = elems[i]) != null; i++ ) {

			if ( acceptData || jQuery.acceptData( elem ) ) {

				id = elem[ internalKey ];
				data = id && cache[ id ];

				if ( data ) {
					if ( data.events ) {
						for ( type in data.events ) {
							if ( special[ type ] ) {
								jQuery.event.remove( elem, type );

							// This is a shortcut to avoid jQuery.event.remove's overhead
							} else {
								jQuery.removeEvent( elem, type, data.handle );
							}
						}
					}

					// Remove cache only if it was not already removed by jQuery.event.remove
					if ( cache[ id ] ) {

						delete cache[ id ];

						// IE does not allow us to delete expando properties from nodes,
						// nor does it have a removeAttribute function on Document nodes;
						// we must handle all of these cases
						if ( deleteExpando ) {
							delete elem[ internalKey ];

						} else if ( elem.removeAttribute ) {
							elem.removeAttribute( internalKey );

						} else {
							elem[ internalKey ] = null;
						}

						jQuery.deletedIds.push( id );
					}
				}
			}
		}
	}
});
// Limit scope pollution from any deprecated API
(function() {

var matched, browser;

// Use of jQuery.browser is frowned upon.
// More details: http://api.jquery.com/jQuery.browser
// jQuery.uaMatch maintained for back-compat
jQuery.uaMatch = function( ua ) {
	ua = ua.toLowerCase();

	var match = /(chrome)[ \/]([\w.]+)/.exec( ua ) ||
		/(webkit)[ \/]([\w.]+)/.exec( ua ) ||
		/(opera)(?:.*version|)[ \/]([\w.]+)/.exec( ua ) ||
		/(msie) ([\w.]+)/.exec( ua ) ||
		ua.indexOf("compatible") < 0 && /(mozilla)(?:.*? rv:([\w.]+)|)/.exec( ua ) ||
		[];

	return {
		browser: match[ 1 ] || "",
		version: match[ 2 ] || "0"
	};
};

matched = jQuery.uaMatch( navigator.userAgent );
browser = {};

if ( matched.browser ) {
	browser[ matched.browser ] = true;
	browser.version = matched.version;
}

// Deprecated, use jQuery.browser.webkit instead
// Maintained for back-compat only
if ( browser.webkit ) {
	browser.safari = true;
}

jQuery.browser = browser;

jQuery.sub = function() {
	function jQuerySub( selector, context ) {
		return new jQuerySub.fn.init( selector, context );
	}
	jQuery.extend( true, jQuerySub, this );
	jQuerySub.superclass = this;
	jQuerySub.fn = jQuerySub.prototype = this();
	jQuerySub.fn.constructor = jQuerySub;
	jQuerySub.sub = this.sub;
	jQuerySub.fn.init = function init( selector, context ) {
		if ( context && context instanceof jQuery && !(context instanceof jQuerySub) ) {
			context = jQuerySub( context );
		}

		return jQuery.fn.init.call( this, selector, context, rootjQuerySub );
	};
	jQuerySub.fn.init.prototype = jQuerySub.fn;
	var rootjQuerySub = jQuerySub(document);
	return jQuerySub;
};
	
})();
var curCSS, iframe, iframeDoc,
	ralpha = /alpha\([^)]*\)/i,
	ropacity = /opacity=([^)]*)/,
	rposition = /^(top|right|bottom|left)$/,
	rmargin = /^margin/,
	rnumsplit = new RegExp( "^(" + core_pnum + ")(.*)$", "i" ),
	rnumnonpx = new RegExp( "^(" + core_pnum + ")(?!px)[a-z%]+$", "i" ),
	rrelNum = new RegExp( "^([-+])=(" + core_pnum + ")", "i" ),
	elemdisplay = {},

	cssShow = { position: "absolute", visibility: "hidden", display: "block" },
	cssNormalTransform = {
		letterSpacing: 0,
		fontWeight: 400,
		lineHeight: 1
	},

	cssExpand = [ "Top", "Right", "Bottom", "Left" ],
	cssPrefixes = [ "Webkit", "O", "Moz", "ms" ],

	eventsToggle = jQuery.fn.toggle;

// return a css property mapped to a potentially vendor prefixed property
function vendorPropName( style, name ) {

	// shortcut for names that are not vendor prefixed
	if ( name in style ) {
		return name;
	}

	// check for vendor prefixed names
	var capName = name.charAt(0).toUpperCase() + name.slice(1),
		origName = name,
		i = cssPrefixes.length;

	while ( i-- ) {
		name = cssPrefixes[ i ] + capName;
		if ( name in style ) {
			return name;
		}
	}

	return origName;
}

function isHidden( elem, el ) {
	elem = el || elem;
	return jQuery.css( elem, "display" ) === "none" || !jQuery.contains( elem.ownerDocument, elem );
}

function showHide( elements, show ) {
	var elem, display,
		values = [],
		index = 0,
		length = elements.length;

	for ( ; index < length; index++ ) {
		elem = elements[ index ];
		if ( !elem.style ) {
			continue;
		}
		values[ index ] = jQuery._data( elem, "olddisplay" );
		if ( show ) {
			// Reset the inline display of this element to learn if it is
			// being hidden by cascaded rules or not
			if ( !values[ index ] && elem.style.display === "none" ) {
				elem.style.display = "";
			}

			// Set elements which have been overridden with display: none
			// in a stylesheet to whatever the default browser style is
			// for such an element
			if ( elem.style.display === "" && isHidden( elem ) ) {
				values[ index ] = jQuery._data( elem, "olddisplay", css_defaultDisplay(elem.nodeName) );
			}
		} else {
			display = curCSS( elem, "display" );

			if ( !values[ index ] && display !== "none" ) {
				jQuery._data( elem, "olddisplay", display );
			}
		}
	}

	// Set the display of most of the elements in a second loop
	// to avoid the constant reflow
	for ( index = 0; index < length; index++ ) {
		elem = elements[ index ];
		if ( !elem.style ) {
			continue;
		}
		if ( !show || elem.style.display === "none" || elem.style.display === "" ) {
			elem.style.display = show ? values[ index ] || "" : "none";
		}
	}

	return elements;
}

jQuery.fn.extend({
	css: function( name, value ) {
		return jQuery.access( this, function( elem, name, value ) {
			return value !== undefined ?
				jQuery.style( elem, name, value ) :
				jQuery.css( elem, name );
		}, name, value, arguments.length > 1 );
	},
	show: function() {
		return showHide( this, true );
	},
	hide: function() {
		return showHide( this );
	},
	toggle: function( state, fn2 ) {
		var bool = typeof state === "boolean";

		if ( jQuery.isFunction( state ) && jQuery.isFunction( fn2 ) ) {
			return eventsToggle.apply( this, arguments );
		}

		return this.each(function() {
			if ( bool ? state : isHidden( this ) ) {
				jQuery( this ).show();
			} else {
				jQuery( this ).hide();
			}
		});
	}
});

jQuery.extend({
	// Add in style property hooks for overriding the default
	// behavior of getting and setting a style property
	cssHooks: {
		opacity: {
			get: function( elem, computed ) {
				if ( computed ) {
					// We should always get a number back from opacity
					var ret = curCSS( elem, "opacity" );
					return ret === "" ? "1" : ret;

				}
			}
		}
	},

	// Exclude the following css properties to add px
	cssNumber: {
		"fillOpacity": true,
		"fontWeight": true,
		"lineHeight": true,
		"opacity": true,
		"orphans": true,
		"widows": true,
		"zIndex": true,
		"zoom": true
	},

	// Add in properties whose names you wish to fix before
	// setting or getting the value
	cssProps: {
		// normalize float css property
		"float": jQuery.support.cssFloat ? "cssFloat" : "styleFloat"
	},

	// Get and set the style property on a DOM Node
	style: function( elem, name, value, extra ) {
		// Don't set styles on text and comment nodes
		if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style ) {
			return;
		}

		// Make sure that we're working with the right name
		var ret, type, hooks,
			origName = jQuery.camelCase( name ),
			style = elem.style;

		name = jQuery.cssProps[ origName ] || ( jQuery.cssProps[ origName ] = vendorPropName( style, origName ) );

		// gets hook for the prefixed version
		// followed by the unprefixed version
		hooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];

		// Check if we're setting a value
		if ( value !== undefined ) {
			type = typeof value;

			// convert relative number strings (+= or -=) to relative numbers. #7345
			if ( type === "string" && (ret = rrelNum.exec( value )) ) {
				value = ( ret[1] + 1 ) * ret[2] + parseFloat( jQuery.css( elem, name ) );
				// Fixes bug #9237
				type = "number";
			}

			// Make sure that NaN and null values aren't set. See: #7116
			if ( value == null || type === "number" && isNaN( value ) ) {
				return;
			}

			// If a number was passed in, add 'px' to the (except for certain CSS properties)
			if ( type === "number" && !jQuery.cssNumber[ origName ] ) {
				value += "px";
			}

			// If a hook was provided, use that value, otherwise just set the specified value
			if ( !hooks || !("set" in hooks) || (value = hooks.set( elem, value, extra )) !== undefined ) {
				// Wrapped to prevent IE from throwing errors when 'invalid' values are provided
				// Fixes bug #5509
				try {
					style[ name ] = value;
				} catch(e) {}
			}

		} else {
			// If a hook was provided get the non-computed value from there
			if ( hooks && "get" in hooks && (ret = hooks.get( elem, false, extra )) !== undefined ) {
				return ret;
			}

			// Otherwise just get the value from the style object
			return style[ name ];
		}
	},

	css: function( elem, name, numeric, extra ) {
		var val, num, hooks,
			origName = jQuery.camelCase( name );

		// Make sure that we're working with the right name
		name = jQuery.cssProps[ origName ] || ( jQuery.cssProps[ origName ] = vendorPropName( elem.style, origName ) );

		// gets hook for the prefixed version
		// followed by the unprefixed version
		hooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];

		// If a hook was provided get the computed value from there
		if ( hooks && "get" in hooks ) {
			val = hooks.get( elem, true, extra );
		}

		// Otherwise, if a way to get the computed value exists, use that
		if ( val === undefined ) {
			val = curCSS( elem, name );
		}

		//convert "normal" to computed value
		if ( val === "normal" && name in cssNormalTransform ) {
			val = cssNormalTransform[ name ];
		}

		// Return, converting to number if forced or a qualifier was provided and val looks numeric
		if ( numeric || extra !== undefined ) {
			num = parseFloat( val );
			return numeric || jQuery.isNumeric( num ) ? num || 0 : val;
		}
		return val;
	},

	// A method for quickly swapping in/out CSS properties to get correct calculations
	swap: function( elem, options, callback ) {
		var ret, name,
			old = {};

		// Remember the old values, and insert the new ones
		for ( name in options ) {
			old[ name ] = elem.style[ name ];
			elem.style[ name ] = options[ name ];
		}

		ret = callback.call( elem );

		// Revert the old values
		for ( name in options ) {
			elem.style[ name ] = old[ name ];
		}

		return ret;
	}
});

// NOTE: To any future maintainer, we've used both window.getComputedStyle
// and getComputedStyle here to produce a better gzip size
if ( window.getComputedStyle ) {
	curCSS = function( elem, name ) {
		var ret, width, minWidth, maxWidth,
			computed = getComputedStyle( elem, null ),
			style = elem.style;

		if ( computed ) {

			ret = computed[ name ];
			if ( ret === "" && !jQuery.contains( elem.ownerDocument.documentElement, elem ) ) {
				ret = jQuery.style( elem, name );
			}

			// A tribute to the "awesome hack by Dean Edwards"
			// Chrome < 17 and Safari 5.0 uses "computed value" instead of "used value" for margin-right
			// Safari 5.1.7 (at least) returns percentage for a larger set of values, but width seems to be reliably pixels
			// this is against the CSSOM draft spec: http://dev.w3.org/csswg/cssom/#resolved-values
			if ( rnumnonpx.test( ret ) && rmargin.test( name ) ) {
				width = style.width;
				minWidth = style.minWidth;
				maxWidth = style.maxWidth;

				style.minWidth = style.maxWidth = style.width = ret;
				ret = computed.width;

				style.width = width;
				style.minWidth = minWidth;
				style.maxWidth = maxWidth;
			}
		}

		return ret;
	};
} else if ( document.documentElement.currentStyle ) {
	curCSS = function( elem, name ) {
		var left, rsLeft,
			ret = elem.currentStyle && elem.currentStyle[ name ],
			style = elem.style;

		// Avoid setting ret to empty string here
		// so we don't default to auto
		if ( ret == null && style && style[ name ] ) {
			ret = style[ name ];
		}

		// From the awesome hack by Dean Edwards
		// http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291

		// If we're not dealing with a regular pixel number
		// but a number that has a weird ending, we need to convert it to pixels
		// but not position css attributes, as those are proportional to the parent element instead
		// and we can't measure the parent instead because it might trigger a "stacking dolls" problem
		if ( rnumnonpx.test( ret ) && !rposition.test( name ) ) {

			// Remember the original values
			left = style.left;
			rsLeft = elem.runtimeStyle && elem.runtimeStyle.left;

			// Put in the new values to get a computed value out
			if ( rsLeft ) {
				elem.runtimeStyle.left = elem.currentStyle.left;
			}
			style.left = name === "fontSize" ? "1em" : ret;
			ret = style.pixelLeft + "px";

			// Revert the changed values
			style.left = left;
			if ( rsLeft ) {
				elem.runtimeStyle.left = rsLeft;
			}
		}

		return ret === "" ? "auto" : ret;
	};
}

function setPositiveNumber( elem, value, subtract ) {
	var matches = rnumsplit.exec( value );
	return matches ?
			Math.max( 0, matches[ 1 ] - ( subtract || 0 ) ) + ( matches[ 2 ] || "px" ) :
			value;
}

function augmentWidthOrHeight( elem, name, extra, isBorderBox ) {
	var i = extra === ( isBorderBox ? "border" : "content" ) ?
		// If we already have the right measurement, avoid augmentation
		4 :
		// Otherwise initialize for horizontal or vertical properties
		name === "width" ? 1 : 0,

		val = 0;

	for ( ; i < 4; i += 2 ) {
		// both box models exclude margin, so add it if we want it
		if ( extra === "margin" ) {
			// we use jQuery.css instead of curCSS here
			// because of the reliableMarginRight CSS hook!
			val += jQuery.css( elem, extra + cssExpand[ i ], true );
		}

		// From this point on we use curCSS for maximum performance (relevant in animations)
		if ( isBorderBox ) {
			// border-box includes padding, so remove it if we want content
			if ( extra === "content" ) {
				val -= parseFloat( curCSS( elem, "padding" + cssExpand[ i ] ) ) || 0;
			}

			// at this point, extra isn't border nor margin, so remove border
			if ( extra !== "margin" ) {
				val -= parseFloat( curCSS( elem, "border" + cssExpand[ i ] + "Width" ) ) || 0;
			}
		} else {
			// at this point, extra isn't content, so add padding
			val += parseFloat( curCSS( elem, "padding" + cssExpand[ i ] ) ) || 0;

			// at this point, extra isn't content nor padding, so add border
			if ( extra !== "padding" ) {
				val += parseFloat( curCSS( elem, "border" + cssExpand[ i ] + "Width" ) ) || 0;
			}
		}
	}

	return val;
}

function getWidthOrHeight( elem, name, extra ) {

	// Start with offset property, which is equivalent to the border-box value
	var val = name === "width" ? elem.offsetWidth : elem.offsetHeight,
		valueIsBorderBox = true,
		isBorderBox = jQuery.support.boxSizing && jQuery.css( elem, "boxSizing" ) === "border-box";

	if ( val <= 0 ) {
		// Fall back to computed then uncomputed css if necessary
		val = curCSS( elem, name );
		if ( val < 0 || val == null ) {
			val = elem.style[ name ];
		}

		// Computed unit is not pixels. Stop here and return.
		if ( rnumnonpx.test(val) ) {
			return val;
		}

		// we need the check for style in case a browser which returns unreliable values
		// for getComputedStyle silently falls back to the reliable elem.style
		valueIsBorderBox = isBorderBox && ( jQuery.support.boxSizingReliable || val === elem.style[ name ] );

		// Normalize "", auto, and prepare for extra
		val = parseFloat( val ) || 0;
	}

	// use the active box-sizing model to add/subtract irrelevant styles
	return ( val +
		augmentWidthOrHeight(
			elem,
			name,
			extra || ( isBorderBox ? "border" : "content" ),
			valueIsBorderBox
		)
	) + "px";
}


// Try to determine the default display value of an element
function css_defaultDisplay( nodeName ) {
	if ( elemdisplay[ nodeName ] ) {
		return elemdisplay[ nodeName ];
	}

	var elem = jQuery( "<" + nodeName + ">" ).appendTo( document.body ),
		display = elem.css("display");
	elem.remove();

	// If the simple way fails,
	// get element's real default display by attaching it to a temp iframe
	if ( display === "none" || display === "" ) {
		// Use the already-created iframe if possible
		iframe = document.body.appendChild(
			iframe || jQuery.extend( document.createElement("iframe"), {
				frameBorder: 0,
				width: 0,
				height: 0
			})
		);

		// Create a cacheable copy of the iframe document on first call.
		// IE and Opera will allow us to reuse the iframeDoc without re-writing the fake HTML
		// document to it; WebKit & Firefox won't allow reusing the iframe document.
		if ( !iframeDoc || !iframe.createElement ) {
			iframeDoc = ( iframe.contentWindow || iframe.contentDocument ).document;
			iframeDoc.write("<!doctype html><html><body>");
			iframeDoc.close();
		}

		elem = iframeDoc.body.appendChild( iframeDoc.createElement(nodeName) );

		display = curCSS( elem, "display" );
		document.body.removeChild( iframe );
	}

	// Store the correct default display
	elemdisplay[ nodeName ] = display;

	return display;
}

jQuery.each([ "height", "width" ], function( i, name ) {
	jQuery.cssHooks[ name ] = {
		get: function( elem, computed, extra ) {
			if ( computed ) {
				if ( elem.offsetWidth !== 0 || curCSS( elem, "display" ) !== "none" ) {
					return getWidthOrHeight( elem, name, extra );
				} else {
					return jQuery.swap( elem, cssShow, function() {
						return getWidthOrHeight( elem, name, extra );
					});
				}
			}
		},

		set: function( elem, value, extra ) {
			return setPositiveNumber( elem, value, extra ?
				augmentWidthOrHeight(
					elem,
					name,
					extra,
					jQuery.support.boxSizing && jQuery.css( elem, "boxSizing" ) === "border-box"
				) : 0
			);
		}
	};
});

if ( !jQuery.support.opacity ) {
	jQuery.cssHooks.opacity = {
		get: function( elem, computed ) {
			// IE uses filters for opacity
			return ropacity.test( (computed && elem.currentStyle ? elem.currentStyle.filter : elem.style.filter) || "" ) ?
				( 0.01 * parseFloat( RegExp.$1 ) ) + "" :
				computed ? "1" : "";
		},

		set: function( elem, value ) {
			var style = elem.style,
				currentStyle = elem.currentStyle,
				opacity = jQuery.isNumeric( value ) ? "alpha(opacity=" + value * 100 + ")" : "",
				filter = currentStyle && currentStyle.filter || style.filter || "";

			// IE has trouble with opacity if it does not have layout
			// Force it by setting the zoom level
			style.zoom = 1;

			// if setting opacity to 1, and no other filters exist - attempt to remove filter attribute #6652
			if ( value >= 1 && jQuery.trim( filter.replace( ralpha, "" ) ) === "" &&
				style.removeAttribute ) {

				// Setting style.filter to null, "" & " " still leave "filter:" in the cssText
				// if "filter:" is present at all, clearType is disabled, we want to avoid this
				// style.removeAttribute is IE Only, but so apparently is this code path...
				style.removeAttribute( "filter" );

				// if there there is no filter style applied in a css rule, we are done
				if ( currentStyle && !currentStyle.filter ) {
					return;
				}
			}

			// otherwise, set new filter values
			style.filter = ralpha.test( filter ) ?
				filter.replace( ralpha, opacity ) :
				filter + " " + opacity;
		}
	};
}

// These hooks cannot be added until DOM ready because the support test
// for it is not run until after DOM ready
jQuery(function() {
	if ( !jQuery.support.reliableMarginRight ) {
		jQuery.cssHooks.marginRight = {
			get: function( elem, computed ) {
				// WebKit Bug 13343 - getComputedStyle returns wrong value for margin-right
				// Work around by temporarily setting element display to inline-block
				return jQuery.swap( elem, { "display": "inline-block" }, function() {
					if ( computed ) {
						return curCSS( elem, "marginRight" );
					}
				});
			}
		};
	}

	// Webkit bug: https://bugs.webkit.org/show_bug.cgi?id=29084
	// getComputedStyle returns percent when specified for top/left/bottom/right
	// rather than make the css module depend on the offset module, we just check for it here
	if ( !jQuery.support.pixelPosition && jQuery.fn.position ) {
		jQuery.each( [ "top", "left" ], function( i, prop ) {
			jQuery.cssHooks[ prop ] = {
				get: function( elem, computed ) {
					if ( computed ) {
						var ret = curCSS( elem, prop );
						// if curCSS returns percentage, fallback to offset
						return rnumnonpx.test( ret ) ? jQuery( elem ).position()[ prop ] + "px" : ret;
					}
				}
			};
		});
	}

});

if ( jQuery.expr && jQuery.expr.filters ) {
	jQuery.expr.filters.hidden = function( elem ) {
		return ( elem.offsetWidth === 0 && elem.offsetHeight === 0 ) || (!jQuery.support.reliableHiddenOffsets && ((elem.style && elem.style.display) || curCSS( elem, "display" )) === "none");
	};

	jQuery.expr.filters.visible = function( elem ) {
		return !jQuery.expr.filters.hidden( elem );
	};
}

// These hooks are used by animate to expand properties
jQuery.each({
	margin: "",
	padding: "",
	border: "Width"
}, function( prefix, suffix ) {
	jQuery.cssHooks[ prefix + suffix ] = {
		expand: function( value ) {
			var i,

				// assumes a single number if not a string
				parts = typeof value === "string" ? value.split(" ") : [ value ],
				expanded = {};

			for ( i = 0; i < 4; i++ ) {
				expanded[ prefix + cssExpand[ i ] + suffix ] =
					parts[ i ] || parts[ i - 2 ] || parts[ 0 ];
			}

			return expanded;
		}
	};

	if ( !rmargin.test( prefix ) ) {
		jQuery.cssHooks[ prefix + suffix ].set = setPositiveNumber;
	}
});
var r20 = /%20/g,
	rbracket = /\[\]$/,
	rCRLF = /\r?\n/g,
	rinput = /^(?:color|date|datetime|datetime-local|email|hidden|month|number|password|range|search|tel|text|time|url|week)$/i,
	rselectTextarea = /^(?:select|textarea)/i;

jQuery.fn.extend({
	serialize: function() {
		return jQuery.param( this.serializeArray() );
	},
	serializeArray: function() {
		return this.map(function(){
			return this.elements ? jQuery.makeArray( this.elements ) : this;
		})
		.filter(function(){
			return this.name && !this.disabled &&
				( this.checked || rselectTextarea.test( this.nodeName ) ||
					rinput.test( this.type ) );
		})
		.map(function( i, elem ){
			var val = jQuery( this ).val();

			return val == null ?
				null :
				jQuery.isArray( val ) ?
					jQuery.map( val, function( val, i ){
						return { name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
					}) :
					{ name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
		}).get();
	}
});

//Serialize an array of form elements or a set of
//key/values into a query string
jQuery.param = function( a, traditional ) {
	var prefix,
		s = [],
		add = function( key, value ) {
			// If value is a function, invoke it and return its value
			value = jQuery.isFunction( value ) ? value() : ( value == null ? "" : value );
			s[ s.length ] = encodeURIComponent( key ) + "=" + encodeURIComponent( value );
		};

	// Set traditional to true for jQuery <= 1.3.2 behavior.
	if ( traditional === undefined ) {
		traditional = jQuery.ajaxSettings && jQuery.ajaxSettings.traditional;
	}

	// If an array was passed in, assume that it is an array of form elements.
	if ( jQuery.isArray( a ) || ( a.jquery && !jQuery.isPlainObject( a ) ) ) {
		// Serialize the form elements
		jQuery.each( a, function() {
			add( this.name, this.value );
		});

	} else {
		// If traditional, encode the "old" way (the way 1.3.2 or older
		// did it), otherwise encode params recursively.
		for ( prefix in a ) {
			buildParams( prefix, a[ prefix ], traditional, add );
		}
	}

	// Return the resulting serialization
	return s.join( "&" ).replace( r20, "+" );
};

function buildParams( prefix, obj, traditional, add ) {
	var name;

	if ( jQuery.isArray( obj ) ) {
		// Serialize array item.
		jQuery.each( obj, function( i, v ) {
			if ( traditional || rbracket.test( prefix ) ) {
				// Treat each array item as a scalar.
				add( prefix, v );

			} else {
				// If array item is non-scalar (array or object), encode its
				// numeric index to resolve deserialization ambiguity issues.
				// Note that rack (as of 1.0.0) can't currently deserialize
				// nested arrays properly, and attempting to do so may cause
				// a server error. Possible fixes are to modify rack's
				// deserialization algorithm or to provide an option or flag
				// to force array serialization to be shallow.
				buildParams( prefix + "[" + ( typeof v === "object" ? i : "" ) + "]", v, traditional, add );
			}
		});

	} else if ( !traditional && jQuery.type( obj ) === "object" ) {
		// Serialize object item.
		for ( name in obj ) {
			buildParams( prefix + "[" + name + "]", obj[ name ], traditional, add );
		}

	} else {
		// Serialize scalar item.
		add( prefix, obj );
	}
}
var // Document location
	ajaxLocation,
	// Document location segments
	ajaxLocParts,

	rhash = /#.*$/,
	rheaders = /^(.*?):[ \t]*([^\r\n]*)\r?$/mg, // IE leaves an \r character at EOL
	// #7653, #8125, #8152: local protocol detection
	rlocalProtocol = /^(?:about|app|app\-storage|.+\-extension|file|res|widget):$/,
	rnoContent = /^(?:GET|HEAD)$/,
	rprotocol = /^\/\//,
	rquery = /\?/,
	rscript = /<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi,
	rts = /([?&])_=[^&]*/,
	rurl = /^([\w\+\.\-]+:)(?:\/\/([^\/?#:]*)(?::(\d+)|)|)/,

	// Keep a copy of the old load method
	_load = jQuery.fn.load,

	/* Prefilters
	 * 1) They are useful to introduce custom dataTypes (see ajax/jsonp.js for an example)
	 * 2) These are called:
	 *    - BEFORE asking for a transport
	 *    - AFTER param serialization (s.data is a string if s.processData is true)
	 * 3) key is the dataType
	 * 4) the catchall symbol "*" can be used
	 * 5) execution will start with transport dataType and THEN continue down to "*" if needed
	 */
	prefilters = {},

	/* Transports bindings
	 * 1) key is the dataType
	 * 2) the catchall symbol "*" can be used
	 * 3) selection will start with transport dataType and THEN go to "*" if needed
	 */
	transports = {},

	// Avoid comment-prolog char sequence (#10098); must appease lint and evade compression
	allTypes = ["*/"] + ["*"];

// #8138, IE may throw an exception when accessing
// a field from window.location if document.domain has been set
try {
	ajaxLocation = location.href;
} catch( e ) {
	// Use the href attribute of an A element
	// since IE will modify it given document.location
	ajaxLocation = document.createElement( "a" );
	ajaxLocation.href = "";
	ajaxLocation = ajaxLocation.href;
}

// Segment location into parts
ajaxLocParts = rurl.exec( ajaxLocation.toLowerCase() ) || [];

// Base "constructor" for jQuery.ajaxPrefilter and jQuery.ajaxTransport
function addToPrefiltersOrTransports( structure ) {

	// dataTypeExpression is optional and defaults to "*"
	return function( dataTypeExpression, func ) {

		if ( typeof dataTypeExpression !== "string" ) {
			func = dataTypeExpression;
			dataTypeExpression = "*";
		}

		var dataType, list, placeBefore,
			dataTypes = dataTypeExpression.toLowerCase().split( core_rspace ),
			i = 0,
			length = dataTypes.length;

		if ( jQuery.isFunction( func ) ) {
			// For each dataType in the dataTypeExpression
			for ( ; i < length; i++ ) {
				dataType = dataTypes[ i ];
				// We control if we're asked to add before
				// any existing element
				placeBefore = /^\+/.test( dataType );
				if ( placeBefore ) {
					dataType = dataType.substr( 1 ) || "*";
				}
				list = structure[ dataType ] = structure[ dataType ] || [];
				// then we add to the structure accordingly
				list[ placeBefore ? "unshift" : "push" ]( func );
			}
		}
	};
}

// Base inspection function for prefilters and transports
function inspectPrefiltersOrTransports( structure, options, originalOptions, jqXHR,
		dataType /* internal */, inspected /* internal */ ) {

	dataType = dataType || options.dataTypes[ 0 ];
	inspected = inspected || {};

	inspected[ dataType ] = true;

	var selection,
		list = structure[ dataType ],
		i = 0,
		length = list ? list.length : 0,
		executeOnly = ( structure === prefilters );

	for ( ; i < length && ( executeOnly || !selection ); i++ ) {
		selection = list[ i ]( options, originalOptions, jqXHR );
		// If we got redirected to another dataType
		// we try there if executing only and not done already
		if ( typeof selection === "string" ) {
			if ( !executeOnly || inspected[ selection ] ) {
				selection = undefined;
			} else {
				options.dataTypes.unshift( selection );
				selection = inspectPrefiltersOrTransports(
						structure, options, originalOptions, jqXHR, selection, inspected );
			}
		}
	}
	// If we're only executing or nothing was selected
	// we try the catchall dataType if not done already
	if ( ( executeOnly || !selection ) && !inspected[ "*" ] ) {
		selection = inspectPrefiltersOrTransports(
				structure, options, originalOptions, jqXHR, "*", inspected );
	}
	// unnecessary when only executing (prefilters)
	// but it'll be ignored by the caller in that case
	return selection;
}

// A special extend for ajax options
// that takes "flat" options (not to be deep extended)
// Fixes #9887
function ajaxExtend( target, src ) {
	var key, deep,
		flatOptions = jQuery.ajaxSettings.flatOptions || {};
	for ( key in src ) {
		if ( src[ key ] !== undefined ) {
			( flatOptions[ key ] ? target : ( deep || ( deep = {} ) ) )[ key ] = src[ key ];
		}
	}
	if ( deep ) {
		jQuery.extend( true, target, deep );
	}
}

jQuery.fn.load = function( url, params, callback ) {
	if ( typeof url !== "string" && _load ) {
		return _load.apply( this, arguments );
	}

	// Don't do a request if no elements are being requested
	if ( !this.length ) {
		return this;
	}

	var selector, type, response,
		self = this,
		off = url.indexOf(" ");

	if ( off >= 0 ) {
		selector = url.slice( off, url.length );
		url = url.slice( 0, off );
	}

	// If it's a function
	if ( jQuery.isFunction( params ) ) {

		// We assume that it's the callback
		callback = params;
		params = undefined;

	// Otherwise, build a param string
	} else if ( typeof params === "object" ) {
		type = "POST";
	}

	// Request the remote document
	jQuery.ajax({
		url: url,

		// if "type" variable is undefined, then "GET" method will be used
		type: type,
		dataType: "html",
		data: params,
		complete: function( jqXHR, status ) {
			if ( callback ) {
				self.each( callback, response || [ jqXHR.responseText, status, jqXHR ] );
			}
		}
	}).done(function( responseText ) {

		// Save response for use in complete callback
		response = arguments;

		// See if a selector was specified
		self.html( selector ?

			// Create a dummy div to hold the results
			jQuery("<div>")

				// inject the contents of the document in, removing the scripts
				// to avoid any 'Permission Denied' errors in IE
				.append( responseText.replace( rscript, "" ) )

				// Locate the specified elements
				.find( selector ) :

			// If not, just inject the full result
			responseText );

	});

	return this;
};

// Attach a bunch of functions for handling common AJAX events
jQuery.each( "ajaxStart ajaxStop ajaxComplete ajaxError ajaxSuccess ajaxSend".split( " " ), function( i, o ){
	jQuery.fn[ o ] = function( f ){
		return this.on( o, f );
	};
});

jQuery.each( [ "get", "post" ], function( i, method ) {
	jQuery[ method ] = function( url, data, callback, type ) {
		// shift arguments if data argument was omitted
		if ( jQuery.isFunction( data ) ) {
			type = type || callback;
			callback = data;
			data = undefined;
		}

		return jQuery.ajax({
			type: method,
			url: url,
			data: data,
			success: callback,
			dataType: type
		});
	};
});

jQuery.extend({

	getScript: function( url, callback ) {
		return jQuery.get( url, undefined, callback, "script" );
	},

	getJSON: function( url, data, callback ) {
		return jQuery.get( url, data, callback, "json" );
	},

	// Creates a full fledged settings object into target
	// with both ajaxSettings and settings fields.
	// If target is omitted, writes into ajaxSettings.
	ajaxSetup: function( target, settings ) {
		if ( settings ) {
			// Building a settings object
			ajaxExtend( target, jQuery.ajaxSettings );
		} else {
			// Extending ajaxSettings
			settings = target;
			target = jQuery.ajaxSettings;
		}
		ajaxExtend( target, settings );
		return target;
	},

	ajaxSettings: {
		url: ajaxLocation,
		isLocal: rlocalProtocol.test( ajaxLocParts[ 1 ] ),
		global: true,
		type: "GET",
		contentType: "application/x-www-form-urlencoded; charset=UTF-8",
		processData: true,
		async: true,
		/*
		timeout: 0,
		data: null,
		dataType: null,
		username: null,
		password: null,
		cache: null,
		throws: false,
		traditional: false,
		headers: {},
		*/

		accepts: {
			xml: "application/xml, text/xml",
			html: "text/html",
			text: "text/plain",
			json: "application/json, text/javascript",
			"*": allTypes
		},

		contents: {
			xml: /xml/,
			html: /html/,
			json: /json/
		},

		responseFields: {
			xml: "responseXML",
			text: "responseText"
		},

		// List of data converters
		// 1) key format is "source_type destination_type" (a single space in-between)
		// 2) the catchall symbol "*" can be used for source_type
		converters: {

			// Convert anything to text
			"* text": window.String,

			// Text to html (true = no transformation)
			"text html": true,

			// Evaluate text as a json expression
			"text json": jQuery.parseJSON,

jquery.hotkeys.js

loop.js

rAF.js

stats.min.js

underscore.js

worker.js