Tree Bundle

<!DOCTYPE html>
<meta charset="utf-8">
<style>

.node {
  font: 11px "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.link {
  stroke: red;
  stroke-opacity: 0.1;
  fill: none;
  stroke-width:1;
}

</style>
<body>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script>

var diameter = 660,
    radius = diameter / 2,
    innerRadius = radius - 120;

var cluster = d3.layout.cluster()
    .size([360, innerRadius])
    .sort(null)
    .value(function(d) { return d.size; });

var bundle = d3.layout.bundle();

var line = d3.svg.line.radial()
    .interpolate("bundle")
    .tension(0.85)
    .radius(function(d) { return d.y; })
    .angle(function(d) { return d.x / 180 * Math.PI; });

var svg = d3.select("body").append("svg")
    .attr("width", diameter)
    .attr("height", diameter)
  .append("g")
    .attr("transform", "translate(" + radius + "," + radius + ")");

d3.json("teams.json", function(error, classes) {
  var nodes = cluster.nodes(packageHierarchy(classes)),
      links = packageImports(nodes);

svg.selectAll(".link")
      .data(bundle(links))
    .enter().append("path")
      .attr("class", "link")
      .attr("d", line);

svg.selectAll(".node")
      .data(nodes.filter(function(n) { return !n.children; }))
    .enter().append("g")
      .attr("class", "node")
      .attr("transform", function(d) { return "rotate(" + (d.x - 90) + ")translate(" + d.y + ")"; })
    .append("text")
      .attr("dx", function(d) { return d.x < 180 ? 8 : -8; })
      .attr("dy", ".31em")
      .attr("text-anchor", function(d) { return d.x < 180 ? "start" : "end"; })
      .attr("transform", function(d) { return d.x < 180 ? null : "rotate(180)"; })
      .text(function(d) { return d.key; });
});

d3.select(self.frameElement).style("height", diameter + "px");

// Lazily construct the package hierarchy from class names.
function packageHierarchy(classes) {
  var map = {};

classes.forEach(function(d) {
    find(d.name, d);
  });

return map[""];
}

// Return a list of imports for the given array of nodes.
function packageImports(nodes) {
  var map = {},
      imports = [];

// Compute a map from name to node.
  nodes.forEach(function(d) {
    map[d.name] = d;
  });

// For each import, construct a link from the source to target node.
  nodes.forEach(function(d) {
    if (d.imports) d.imports.forEach(function(i) {
      imports.push({source: map[d.name], target: map[i]});
    });
  });

return imports;
}

</script>

Modified http://d3js.org/d3.v3.min.js to a secure url

https://d3js.org/d3.v3.min.js