D3 Examples - Grid Multi Foci Force Layout

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<!DOCTYPE html>
<meta charset="utf-8">
<style>
​
circle {
  stroke: #fff;
}
​
</style>
<body>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script type="text/javascript" src="https://code.jquery.com/jquery-1.8.2.min.js"></script>
<script>
​
// set parameters
var r         = 10,
    w         = $(window).width(),
    h         = $(window).height(),
    width     = w-100,
    height    = h-100,
    padding   = 6, // separation between nodes
    maxRadius = 20,
    n         = 200, // total number of nodes
    m         = 8; // number of distinct clusters
​
// color scale 
var color = d3.scale.category10()
    .domain(d3.range(m));
​
// ordinal x scale  
var x = d3.scale.ordinal()
    .domain(d3.range(m))
    .rangePoints([0, width], 1);
​
// main data
var data = [
  {"project":"Thomas Lee-Warren","status":"In Progress","cx":820,"cy":50,"radius":14},
  {"project":"Thomas Lee-Warren","status":"Initial Engagement","cx":280,"cy":50,"radius":8},
  {"project":"Thomas Lee-Warren","status":"In Progress","cx":820,"cy":50,"radius":18},
  {"project":"Peter Bassett","status":"Initial Engagement","cx":280,"cy":170,"radius":5},
  {"project":"Peter Bassett","status":"Initial Engagement","cx":280,"cy":170,"radius":10},
  {"project":"Nigel Hodges","status":"Suspect","cx":100,"cy":290,"radius":19},
  {"project":"Peter Bassett","status":"Suspect","cx":100,"cy":170,"radius":15},
  {"project":"Andy McMurtrie","status":"Initial Engagement","cx":280,"cy":410,"radius":20},
  {"project":"Thomas Lee-Warren","status":"In Progress","cx":820,"cy":50,"radius":14},
  {"project":"Unknown","status":"Rejected","cx":1180,"cy":650,"radius":20},
  {"project":"Nigel Hodges","status":"Initial Engagement","cx":280,"cy":290,"radius":12},
  {"project":"Thomas Lee-Warren","status":"In Progress","cx":820,"cy":50,"radius":20},
  {"project":"Nigel Hodges","status":"Initial Engagement","cx":280,"cy":290,"radius":17},
  {"project":"Nigel Hodges","status":"Initial Engagement","cx":280,"cy":290,"radius":19},
  {"project":"Peter Bassett","status":"Initial Engagement","cx":280,"cy":170,"radius":10},
  {"project":"Nigel Hodges","status":"Initial Engagement","cx":280,"cy":290,"radius":10},
  {"project":"Nigel Hodges","status":"Initial Engagement","cx":280,"cy":290,"radius":5},
  {"project":"Nigel Hodges","status":"Initial Engagement","cx":280,"cy":290,"radius":11},
  {"project":"Peter Simmonds","status":"Completed","cx":1000,"cy":530,"radius":15},
  {"project":"Andy McMurtrie","status":"Initial Engagement","cx":280,"cy":410,"radius":14},
  {"project":"Peter Bassett","status":"Initial Engagement","cx":280,"cy":170,"radius":12},
  {"project":"Thomas Lee-Warren","status":"Initial Engagement","cx":280,"cy":50,"radius":16},
  {"project":"Peter Bassett","status":"In Progress","cx":820,"cy":170,"radius":16},
  {"project":"Unknown","status":"Rejected","cx":1180,"cy":650,"radius":19},
  {"project":"Nigel Hodges","status":"Initial Engagement","cx":280,"cy":290,"radius":20},
  {"project":"Peter Bassett","status":"Suspect","cx":100,"cy":170,"radius":9},
  {"project":"Nigel Hodges","status":"Initial Engagement","cx":280,"cy":290,"radius":10},
  {"project":"Nigel Hodges","status":"Initial Engagement","cx":280,"cy":290,"radius":17},
  {"project":"Nigel Hodges","status":"Initial Engagement","cx":280,"cy":290,"radius":18},
  {"project":"Andy McMurtrie","status":"Initial Engagement","cx":280,"cy":410,"radius":8},
  {"project":"Peter Bassett","status":"Rejected","cx":1180,"cy":170,"radius":6},
  {"project":"Peter Bassett","status":"In Progress","cx":820,"cy":170,"radius":17},
  {"project":"Peter Bassett","status":"In Progress","cx":820,"cy":170,"radius":10},
  {"project":"Peter Bassett","status":"In Progress","cx":820,"cy":170,"radius":5},
  {"project":"Andy McMurtrie","status":"Initial Engagement","cx":280,"cy":410,"radius":20},
  {"project":"Andy McMurtrie","status":"Initial Engagement","cx":280,"cy":410,"radius":20},
  {"project":"Andy McMurtrie","status":"Qualified ","cx":460,"cy":410,"radius":9},
  {"project":"Andy McMurtrie","status":"In Progress","cx":820,"cy":410,"radius":14},
  {"project":"Andy McMurtrie","status":"In Progress","cx":820,"cy":410,"radius":14},
  {"project":"Andy McMurtrie","status":"Suspect","cx":100,"cy":410,"radius":12},
  {"project":"Andy McMurtrie","status":"Funding Sought","cx":640,"cy":410,"radius":12},
  {"project":"Thomas Lee-Warren","status":"Qualified ","cx":460,"cy":50,"radius":14},
  {"project":"Andy McMurtrie","status":"In Progress","cx":820,"cy":410,"radius":17},
  {"project":"Andy McMurtrie","status":"Initial Engagement","cx":280,"cy":410,"radius":12},
  {"project":"Andy McMurtrie","status":"Funding Sought","cx":640,"cy":410,"radius":10},
  {"project":"Nigel Hodges","status":"In Progress","cx":820,"cy":290,"radius":10},
  {"project":"Nigel Hodges","status":"Initial Engagement","cx":280,"cy":290,"radius":20},
  {"project":"Andy McMurtrie","status":"Initial Engagement","cx":280,"cy":410,"radius":12}
]
​
​
// status driven categorical x-axis
var xDomain  = ["Suspect","Initial Engagement","Qualified ","Funding Sought","In Progress","Completed","Rejected"];
​
var xScale = d3.scale.ordinal()
               .domain(xDomain)
               .rangeBands([50,800]);
​
// project driven categorical y-axis
var yDomain = ["Thomas Lee-Warren","Peter Bassett","Nigel Hodges","Andy McMurtrie","Peter Simmonds","Unknown"];
  
var yScale = d3.scale.ordinal()
               .domain(yDomain)
               .rangeBands([50,800]);
  
// update data
data.forEach(function(d) {
  d.cx = xScale(d.status);
  d.cy = yScale(d.project);
});
    
// setup force layout  
var force = d3.layout.force()
    .nodes(data)
    .size([width, height])
    .gravity(0)
    .charge(0)
    .on("tick", tick)
    .start();
​
// container svg
var svg = d3.select("body").append("svg")
    .attr("width", width+80)
    .attr("height", height+80);
​
// draw initial circles  
var circle = svg.selectAll("circle")
    .data(data)
  .enter().append("circle")
    // radius
    .attr("r", function(d) { return d.radius; })
    // fill color
    .style("fill", function(d) { return color(d.project); })
    // stroke color
    .style("stroke","gray")
    // stoke width
        .style("stroke-width","1px")
    // enable drag option
    .call(force.drag); 
​
// tick function  
function tick(e) {
  circle
      .each(gravity(.2 * e.alpha))
      .each(collide(.5))
      .attr("cx", function(d) { return d.x; })
      .attr("cy", function(d) { return d.y; });
}
​
// move nodes toward cluster focus.
function gravity(alpha) {
  return function(d) {
    d.y += (d.cy - d.y) * alpha;
    d.x += (d.cx - d.x) * alpha;
  };
}
​
// resolve collisions between nodes.
function collide(alpha) {
  var quadtree = d3.geom.quadtree(data);
  return function(d) {
    var r = d.radius + maxRadius + 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;
    });
  };
}
  
circle.append("title").text(function(d) {return d.color ;});
​
</script>
    