D3 Examples - Partner Allocation

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<!DOCTYPE html>
<head>
    <title>Partner Allocation</title>
    <meta charset="utf-8">
</head>
​
<body>
    
<div id="main-wrapper">
    <div id="chart"></div>
</div><!-- @end #main-wrapper -->
​
​
<script src="https://d3js.org/d3.v3.min.js"></script>
​
<script>
    
var margin = {top: 16, right: 0, bottom: 0, left: 0},
    width = 950 - margin.left - margin.right,
    height = 950 - margin.top - margin.bottom;
    
var node_radius = 5,
    padding = 1,
    cluster_padding = 10,
    num_nodes = 132;
​
var svg = d3.select("#chart").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
​
var foci = {
    "toppos": { x: 475, y: 100, color: "#99CC00" },
    "leftpos": { x: 225, y: 300, color: "#006699" },
    "rightpos": { x: 725, y: 300, color: "#808080" },
    "bottompos": { x: 475, y: 300, color: "#800080" },
};
​
var nodes = d3.range(0, num_nodes).map(function(o, i) {
    return {
        id: "node" + i,
        x: foci.toppos.x + Math.random(),
        y: foci.toppos.y + Math.random(),
        radius: node_radius,
        choice: "toppos",
    }
});
​
var force = d3.layout.force()
    .nodes(nodes)
    .size([width, height])
    .gravity(0)
    .charge(0.2)
    .friction(0.92)
    .on("tick", tick)
    .start();
    
var circle = svg.selectAll("circle")
    .data(nodes)
  .enter().append("circle")
    .attr("id", function(d) { return d.id; })
    .attr("class", "node"); 
​
​
circle.transition()
    .delay(function(d,i) { return i * 5; })
    .attrTween("r", function(d) {
        var i = d3.interpolate(0, d.radius);
        return function(t) { return d.radius = i(t); };
    });
​
​
svg.append("text")
        .attr("x", 230)             
        .attr("y", 375)
        .attr("text-anchor", "middle")  
        .style("font-size", "16px")
        .style("font-family","sans-serif")
        .text("Maths Tutoring");
​
svg.append("text")
        .attr("x", 475)             
        .attr("y", 375) 
        .attr("text-anchor", "middle")  
        .style("font-size", "16px")
        .style("font-family","sans-serif")
        .text("Counselling");
​
svg.append("text")
        .attr("x", 740)             
        .attr("y", 375)
        .attr("text-anchor", "middle")  
        .style("font-size", "16px")
        .style("font-family","sans-serif")
        .text("English tutoring");
​
svg.append("rect")
        .attr("x", 740)             
        .attr("y", 50)
        .attr("width", 10)
        .attr("height",10)
        .style("fill","#99CC00");
​
svg.append("text")
        .attr("x", 810)             
        .attr("y", 59)
        .attr("text-anchor", "middle")  
        .style("font-size", "10px")
        .style("font-family","sans-serif")
        .text("Needs light touch support")
​
svg.append("rect")
        .attr("x", 740)             
        .attr("y", 70)
        .attr("width", 10)
        .attr("height",10)
        .style("fill","#006699");
    
​
svg.append("text")
        .attr("x", 801)             
        .attr("y", 79)
        .attr("text-anchor", "middle")  
        .style("font-size", "10px")
        .style("font-family","sans-serif")
        .text("Needs Maths support")
​
    
svg.append("rect")
        .attr("x", 740)             
        .attr("y", 90)
        .attr("width", 10)
        .attr("height",10)
        .style("fill","#808080");
    
​
svg.append("text")
        .attr("x", 802)             
        .attr("y", 99)
        .attr("text-anchor", "middle")  
        .style("font-size", "10px")
        .style("font-family","sans-serif")
        .text("Needs English support")
​
    
svg.append("rect")
        .attr("x", 740)             
        .attr("y", 110)
        .attr("width", 10)
        .attr("height",10)
        .style("fill","#800080");
    
​
svg.append("text")
        .attr("x", 816)             
        .attr("y", 118)
        .attr("text-anchor", "middle")  
        .style("font-size", "10px")
        .style("font-family","sans-serif")
        .text("Needs mental health support")
​
var timeout;
function timer() {
    
    
    var choices = d3.keys(foci);
    var foci_index = Math.floor(Math.random() * choices.length );
    var choice = d3.keys(foci)[foci_index];
    
    
    var random_index = Math.floor( Math.random() * nodes.length );
    nodes[random_index].choice = choice;
    
    force.resume();
        
    timeout = setTimeout(timer, 100);
}
​
timeout = setTimeout(timer, 400);
​
​
function tick(e) {
  circle
    .each(gravity(.051 * e.alpha))
    .each(collide(.5))
    .style("fill", function(d) { return foci[d.choice].color; })
    .attr("cx", function(d) { return d.x; })
    .attr("cy", function(d) { return d.y; });
}
​
​
function gravity(alpha) {
  return function(d) {
    d.y += (foci[d.choice].y - d.y) * alpha;
    d.x += (foci[d.choice].x - d.x) * alpha;
  };
}
​
function collide(alpha) {
  var quadtree = d3.geom.quadtree(nodes);
  return function(d) {
      var r = d.radius + node_radius + Math.max(padding, cluster_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.choice === quad.point.choice ? padding : cluster_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;
    });
  };
};
​
    
</script>
​
​
</body>
​
    