D3 Examples - Shiboronoi

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<!DOCTYPE html>
<meta charset="utf-8">
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>
​
var width = 960,
    height = 500,
    id = 0;
​
var voronoi = d3.geom.voronoi()
    .clipExtent([[-1, -1], [width + 1, height + 1]]);
​
var canvas = d3.select("body").append("canvas")
    .attr("width", width)
    .attr("height", height);
​
var context = canvas.node().getContext("2d");
​
d3.tsv("shibe.tsv", function(error, vertices) {
  if (error) throw error;
​
  var shibe = new Image;
  shibe.src = "shibe.jpg";
  shibe.onload = loaded;
​
  function loaded() {
    canvas.on("mousemove", mousemoved);
    render();
  }
​
  function mousemoved() {
    vertices[0] = d3.mouse(this);
    render();
  }
​
  function render() {
    var cells = voronoi(vertices);
​
    cells.forEach(function(cell) {
      context.save();
      path(cell);
      context.clip();
      context.drawImage(shibe, cell.point[0] - 90, cell.point[1] - 115);
      context.stroke();
      context.restore();
    });
  }
});
​
function path(cell) {
  context.beginPath();
  context.moveTo(cell[0][0], cell[0][1]);
  for (var i = 1, n = cell.length; i < n; ++i) context.lineTo(cell[i][0], cell[i][1]);
  context.closePath();
}
​
</script>
​
    