baobob

baobob.js

(function () {

  var root = this,
      previousDollar = root["$"];

  var $ = function (it) {
    return document.getElementById(it);
  };

  root.baobob = root["$"] = $;
  $.noConflict = function () {
    root["$"] = previousDollar;
  };

  // Combinators

  var S, K, I, M, Y;

  $.comb = {
    // Starling                 \abc.ac(bc)
    S: (S = function (a) {
      return function (b) {
        return function (c) {
          return (a(c))(b(c));
        };
      };
    }),

    // Kestrel                  \ab.a
    K: (K = function (a) {
      return function (b) {
        return a;
      };
    }),

    // Idiot Bird               \a.a
    I: (I = S(K)(K)),

    // Mockingbird              \a.aa
    M: (M = S(I)(I)),

    // Why Bird                 \a.a(\a)
    Y: (Y = function (f) {
      return (function (x) {
        return f(function (v) {
          return x(x)(v);
        });
      })
      (function (x) {
        return f(function (v) {
          return x(x)(v);
        });
      });
    })
  };

  // DOM Manipulation

  $.ready = function(W,D){ // https://github.com/airportyh/onready
    function e(){f=!0;c(e);if(b){for(var a=0;a<b.length;a++)b[a]();b=null}}
    var d,c,E=W.addEventListener,R=W.removeEventListener,A=D.attachEvent,
    T=D.detachEvent,L="load",C="DOMContentLoaded",O="onreadystatechange";
    E?(d=function(a){E(C,a,!1);E(L,a,!1)},c=function(a){R(C,a,!1);R(L,a,!1)}
    ):A&&(d=function(a){A(O,a);A(L,a)},c=function(a){T(O,a);T(L,a)});
    var b=null,f=!1;return function(a){if(f)a();else{if(!b){b=[];d(e)}
    b.push(a)}}}(window,document);

  // chain.js <https://github.com/chriso/chain.js>
  // Copyright (c) 2010 Chris O'Hara <cohara87@gmail.com>. MIT Licensed
  (function(a){a=a||{};var b={},c,d;c=function(a,d,e){var f=a.halt=!1;a.error=function(a){throw a},a.next=function(c){c&&(f=!1);if(!a.halt&&d&&d.length){var e=d.shift(),g=e.shift();f=!0;try{b[g].apply(a,[e,e.length,g])}catch(h){a.error(h)}}return a};for(var g in b){if(typeof a[g]==="function")continue;(function(e){a[e]=function(){var g=Array.prototype.slice.call(arguments);if(e==="onError"){if(d){b.onError.apply(a,[g,g.length]);return a}var h={};b.onError.apply(h,[g,g.length]);return c(h,null,"onError")}g.unshift(e);if(!d)return c({},[g],e);a.then=a[e],d.push(g);return f?a:a.next()}})(g)}e&&(a.then=a[e]),a.call=function(b,c){c.unshift(b),d.unshift(c),a.next(!0)};return a.next()},d=a.addMethod=function(d){var e=Array.prototype.slice.call(arguments),f=e.pop();for(var g=0,h=e.length;g<h;g++)typeof e[g]==="string"&&(b[e[g]]=f);--h||(b["then"+d.substr(0,1).toUpperCase()+d.substr(1)]=f),c(a)},d("chain",function(a){var b=this,c=function(){if(!b.halt){if(!a.length)return b.next(!0);try{null!=a.shift().call(b,c,b.error)&&c()}catch(d){b.error(d)}}};c()}),d("run",function(a,b){var c=this,d=function(){c.halt||--b||c.next(!0)},e=function(a){c.error(a)};for(var f=0,g=b;!c.halt&&f<g;f++)null!=a[f].call(c,d,e)&&d()}),d("defer",function(a){var b=this;setTimeout(function(){b.next(!0)},a.shift())}),d("onError",function(a,b){var c=this;this.error=function(d){c.halt=!0;for(var e=0;e<b;e++)a[e].call(c,d)}})})($);


  var head = document.getElementsByTagName("head")[0] || document.documentElement;

  $.addMethod('load', function (args, argc) {
    for (var queue = [], i = 0; i < argc; i++) {
      (function (i) {
        queue.push(function (src) {
          return function (onload, onerror) {
            var script = document.createElement('script');
            script.type = 'text/javascript';
            script.src = src;
            script.onload = onload;
            script.onerror = onerror;
            script.onreadystatechange = function () {
              var state = this.readyState;
              if (state === 'loaded' || state === 'complete') {
                script.onreadystatechange = null;
                onload();
              }
            };
            head.insertBefore(script, head.firstChild);
          }
        }(args[i]));
      }(i));
    }
    this.call('run', queue);
  });

  $.addMethod('css', function (args, argc) {
    for (var queue = [], i = 0; i < argc; i++) {
      (function (i) {
        queue.push(function (href) {
          return function (onload, onerror) {
            var link = document.createElement('link');
            link.type = 'text/css';
            link.href = href;
            head.insertBefore(script, head.firstChild);
          }
        }(args[i]));
      }(i));
    }
    this.call('run', queue);
  });

  // HTMLCanvasElement

  $.animate = function (frameRate, callback) {
    var options = { frameRate: frameRate };

    Y(function (f) {
      return function (frame) {
        callback.call(options, frame) && setTimeout(function () {
          f.call(options, frame + 1);
        }, 1000 / options.frameRate);
      };
    })(1);
  };

  $.mousemove = function (canvas, callback) {
    return canvas.addEventListener("mousemove", function (event) {
      var totalOffset = { x: 0, y: 0 };

      do {
        totalOffset.x += canvas.offsetLeft;
        totalOffset.y += canvas.offsetTop;
      }
      while (canvas = canvas.offsetParent);

      callback(event.pageX - totalOffset.x, event.pageY - totalOffset.y);
    });
  };

  $.MousePos = function (canvas, startX, startY) {
    var self = this;

    this.canvas = canvas;
    this.x = (startX || 0);
    this.y = (startY || 0);

    Y(function (f) {
      $.mousemove(canvas, function (x, y) {
        self.x = x;
        self.y = y;

        f();
      });
    });
  };

  // Time helpers

  $.inAbout = function(n) {
    return {
      milliseconds: function(f) {
        return setTimeout(f, n);
      },
      seconds: function(f) {
        return setTimeout(f, n * 1000);
      }
    };
  };

  $.every = function(n) {
    return {
      milliseconds: function(f) {
        return setInterval(f, n);
      },
      seconds: function(f) {
        return setInterval(f, n * 1000);
      }
    };
  };

  // Vector Math

  $.Vector = (function () {

    function Vector (x, y, z) {
      this.x = (x || 0);
      this.y = (y || 0);
      this.z = (z || 0);
    };

    Vector.fromArray = function (arr) {
      return new Vector(arr[0], arr[1], arr[2]);
    };

    Vector.fromObject = function (obj) {
      return new Vector(obj.x, obj.y, obj.z);
    };

    var def = Vector.prototype;

    def.toString = function () {
      return "<" + this.x + ", " + this.y + ", " + this.z + ">";
    };

    def.toArray = function () {
      return [this.x, this.y, this.z];
    };

    def.equals = function (other) {
      var a = this.toArray(), b = other.toArray();
      return !(a<b || b<a);
    };

    def.plus = function (other) {
      return new Vector(this.x + other.x, this.y + other.y, this.z + other.z);
    };

    def.minus = function (other) {
      return this.plus(other.times(-1));
    };

    def.times = function (n) {
      return new Vector(this.x * n, this.y * n, this.z * n);
    };

    def.dot = function (other) {
      return (this.x * other.x) + (this.y * other.y) + (this.z * other.z);
    };

    def.magnitude = function () {
      return Math.sqrt(this.dot(this));
    };

    def.unit = function () {
      var magnitude = this.magnitude();
      return new Vector(this.x / magnitude, this.y / magnitude, this.z / magnitude);
    };

    def.cross = function (other) {
      var i = this.y * other.z - other.y * this.z;
      var j = this.z * other.x - other.z * this.x;
      var k = this.x * other.y - other.x * this.y;
      return new Vector(i, j, k);
    };

    def.angleBetween = function (other) {
      return Math.acos(this.dot(other) / (this.magnitude() * other.magnitude())); // radians
    };

    return Vector;

  })();

  $.V = function() { return $.Vector.fromArray(arguments); };

}).call(this);