D3 Examples - Squares ↔ Hexagons

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<!DOCTYPE html>
<meta charset="utf-8">
<style>
​
path {
  fill: none;
  stroke: #000;
  stroke-width: .6px;
}
​
</style>
<body>
<script src="https://d3js.org/d3.v2.min.js?2.9.3"></script>
<script>
​
var width = 960,
    height = 500,
    size = 100,
    offset = 0;
​
var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);
​
var g = svg.selectAll("g")
    .data(d3.geom.voronoi(vertices()))
  .enter().append("g");
​
var path = g.append("path")
    .attr("d", function(d) { return "M" + d.join("L") + "Z"; });
​
var circle = g.append("circle")
    .attr("transform", function(d) { return "translate(" + d + ")"; })
    .attr("r", 2);
​
d3.timer(function() {
  ++offset; if (offset > size) offset -= size;
  var data = vertices();
  path.data(d3.geom.voronoi(data)).attr("d", function(d) { return "M" + d.join("L") + "Z"; });
  circle.data(data).attr("transform", function(d) { return "translate(" + d + ")"; });
});
​
function vertices() {
  return d3.merge(d3.range(-size, width + size, size).map(function(x, i) {
    return d3.range(-size, height + size, size).map(function(y, j) {
      return [x + (j & 1 ? -offset : offset), y];
    });
  }));
}
​
</script>
​
    