d3.unconf 2016, v7 by sxywu

index.html

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.15.0/lodash.min.js"></script>
  <script src="https://npmcdn.com/babel-core@5.8.34/browser.min.js"></script>
  <script type="text/javascript" src="//gka.github.io/chroma.js/vendor/chroma-js/chroma.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    
    svg {
      width: 1000px;
      height: 1000px
    }
  </style>
</head>

<body>
  <svg></svg>
  <script>
var colors = chroma.cubehelix()
    .start(200)
    .rotations(-0.35)
    .gamma(0.7)
    .lightness([0.3, 0.8])
  .scale() // convert to chroma.scale
    .correctLightness()
    .colors(27);
var midpoint = -2/3;
var halfSide = Math.sqrt(1 / 3);
var favoritesScale = d3.scaleLinear()
	.domain([0, 27])
	.range([midpoint, -1]);
var versionScale = d3.scaleLinear()
	.domain([1, 4]).range([6, 3]);
var firstScale = d3.scaleOrdinal()
	.domain(_.range(27)).range(colors);
var triangle = [
  'M' + (-halfSide) + ',-1',
  'L' + (halfSide) + ',-1',
  'L0,0',
  'Z'
];

var hexSize = 75;
var hexData = {
  favorite: 12,
  version: 1,
  first: 23,
};
    
var svg = d3.select('svg').append('g');
var hex = svg.append('g')
	.datum(hexData)
	.attr('transform', 'translate(' + [hexSize * 2, hexSize * 2] + ')' +
        'scale(' + hexSize + ')');
    
var triangles = hex.selectAll('g')
	.data(d => {
    var start = _.random(6);
    return _.times(versionScale(d.version), i => {
      return {
        angle: ((i + start) % 6) * 60,
        midpoint: favoritesScale(d.favorite),
        color: firstScale(d.first),
      };
    });
  }).enter().append('g')
	.attr('transform', d => 'rotate(' + d.angle + ')');
    
triangles.append('path')
	.attr('d', triangle.join(' '))
	.attr('fill', d => d.color);
triangles.selectAll('.subtri')
	.data(d => _.times(3, i => {
  	return Object.assign({
      subangle: i * 120,
    }, d);
  })).enter().append('path')
	.classed('subtri', true)
	.attr('transform', d => 'rotate(' + d.subangle + ' 0 ' + midpoint + ')')
	.attr('d', d => {
  	return [
      'M' + (-halfSide) + ',-.99',
      'L0,' + d.midpoint,
      'L' + halfSide + ',-.99',
      'Z'
    ].join(' ');
  }).attr('fill', '#fff');
    

  </script>
</body>