Force-Directed Graph

This example demonstrates a force-directed graph computed using d3-force.

forked from mbostock's block: Force-Directed Graph

<!DOCTYPE html>
<meta charset="utf-8">
<canvas width="960" height="500"></canvas>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>

var canvas = document.querySelector("canvas"),
    context = canvas.getContext("2d"),
    width = canvas.width,
    height = canvas.height;

var simulation = d3.forceSimulation()
    .force("link", d3.forceLink().id(function(d) { return d.id; }))
    .force("charge", d3.forceManyBody())
    .force("center", d3.forceCenter());

d3.json("miserables.json", function(error, graph) {
  if (error) throw error;

simulation
      .nodes(graph.nodes)
      .on("tick", ticked);

simulation.force("link")
      .links(graph.links);

function ticked() {
    context.clearRect(0, 0, width, height);
    context.save();
    context.translate(width / 2, height / 2 + 40);

context.beginPath();
    graph.links.forEach(drawLink);
    context.strokeStyle = "#aaa";
    context.stroke();

context.beginPath();
    graph.nodes.forEach(drawNode);
    context.fill();
    context.strokeStyle = "#fff";
    context.stroke();

context.restore();
  }
});

function drawLink(d) {
  context.moveTo(d.source.x, d.source.y);
  context.lineTo(d.target.x, d.target.y);
}

function drawNode(d) {
  context.moveTo(d.x + 3, d.y);
  context.arc(d.x, d.y, 3, 0, 2 * Math.PI);
}

</script>

https://d3js.org/d3.v4.min.js