force layout lamp

_.md

[ Launch: force layout ] 5530496 by enjalot
[ Launch: force layout ] 5530308 by enjalot

config.json

{"description":"force layout lamp","endpoint":"","display":"svg","public":true,"require":[],"fileconfigs":{"inlet.js":{"default":true,"vim":false,"emacs":false,"fontSize":12},"style.css":{"default":true,"vim":false,"emacs":false,"fontSize":12},"_.md":{"default":true,"vim":false,"emacs":false,"fontSize":12},"config.json":{"default":true,"vim":false,"emacs":false,"fontSize":12}},"fullscreen":false,"play":true,"loop":false,"restart":true,"autoinit":true,"pause":true,"loop_type":"period","bv":false,"nclones":15,"clone_opacity":0.4,"duration":3000,"ease":"linear","dt":0.01}

inlet.js

/*
*
* working from:
* http://bl.ocks.org/mbostock/1748247
*/

var width = tributary.sw;
var height = tributary.sh;
var radius = d3.scale.sqrt().range([0, 12])
var padding = 6;


var xyGravity = [0, 1.5];

if(tributary.force) {
  tributary.force
    .gravity(0.1968)
    .charge(2.22)
    .friction(0.41762304)
}

tributary.init = function(g) {
  var n = tributary.n = 100;
  m = 10;
  var color = d3.scale.category10().domain(d3.range(m));
  
  tributary.nodes = d3.range(n).map(function() {
    var i = Math.floor(Math.random() * m);
    var v = (i + 1) / m * -Math.log(Math.random());
    var nx = 9
    var y = Math.floor(arguments[1]/nx) * height/nx;
    var x = (arguments[1] % nx) * width/nx;
    return {
      //px: Math.random() * width,
      //py: Math.random() * width,
      px: x,
      py: y,
      x: x,
      y: y,
      radius: radius(v),
      color: color(i)
    };
  });
  tributary.force = d3.layout.force()
    .size([width, height])
    .nodes(tributary.nodes)
    .start()
  //.stop();

  var circle = g.selectAll("circle")
      .data(tributary.nodes)
    .enter().append("circle")
      .attr("r", function(d) { return d.radius; })
      .style("fill", function(d) { return d.color; })
      .call(tributary.force.drag)
      .on("click", function(d) {
        d.rsvp = !d.rsvp
      })
 
}

var time = 0;
tributary.run = function(g,t) {
  //force.alpha(0.01);
  tributary.force.resume();
  tributary.force.tick()
  
  if(Math.floor(time) % 8 === 0) {
    var i = Math.sin(time * Math.PI) * (tributary.n-1);
    i = Math.abs(Math.floor(i));
    if(i < tributary.nodes.length)
      tributary.nodes[i].rsvp = !tributary.nodes[i].rsvp;
  }
  
  g.selectAll("circle")
    .each(gravity(xyGravity))
    .each(collide(0.1))
    .each(eventer)
    .attr("cx", function(d) { return d.x; })
    .attr("cy", function(d) { return d.y; });
  
  
  tributary.force.stop();

  time += t;
}

function eventer(d,i) {
  if(d.rsvp) {
    d.y -= 3.6
  }
}

function gravity(g) {
  return function(d) {
    d.x += g[0]
    d.y += g[1]
  }
}

// Resolves collisions between d and all other circles.
function collide(alpha) {
  var quadtree = d3.geom.quadtree(tributary.nodes);
  return function(d) {
    var r = d.radius + radius.domain()[1] + padding,
        nx1 = d.x - r,
        nx2 = d.x + r,
        ny1 = d.y - r,
        ny2 = d.y + r;
    quadtree.visit(function(quad, x1, y1, x2, y2) {
      if (quad.point && (quad.point !== d)) {
        var x = d.x - quad.point.x,
            y = d.y - quad.point.y,
            l = Math.sqrt(x * x + y * y),
            r = d.radius + quad.point.radius + (d.color !== quad.point.color) * padding;
        if (l < r) {
          l = (l - r) / l * alpha;
          d.x -= x *= l;
          d.y -= y *= l;
          quad.point.x += x;
          quad.point.y += y;
        }
      }
      return x1 > nx2
          || x2 < nx1
          || y1 > ny2
          || y2 < ny1;
    });
  };
}

// Move d to be adjacent to the cluster node.
function cluster(alpha) {
  var max = {};

  // Find the largest node for each cluster.
  nodes.forEach(function(d) {
    if (!(d.color in max) || (d.radius > max[d.color].radius)) {
      max[d.color] = d;
    }
  });

  return function(d) {
    var node = max[d.color],
        l,
        r,
        x,
        y,
        k = 1,
        i = -1;

    // For cluster nodes, apply custom gravity.
    if (node == d) {
      node = {x: width / 2, y: height / 2, radius: -d.radius};
      k = .1 * Math.sqrt(d.radius);
    }

    x = d.x - node.x;
    y = d.y - node.y;
    l = Math.sqrt(x * x + y * y);
    r = d.radius + node.radius;
    if (l != r) {
      l = (l - r) / l * alpha * k;
      d.x -= x *= l;
      d.y -= y *= l;
      node.x += x;
      node.y += y;
    }
  };
}

style.css

circle {
  stroke: #ffffff;
}