D3 Examples - 2015 unconf registration

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
  <script src="sampler.js"></script>
</head>
<style>
  body {
    background-color: #02238A;
  }
</style>
​
​
<body>
<svg width=960 height=500>
  <g transform="translate(-50,0)"
    opacity=0>
    <path
      id="outer"
      fill="none"
      stroke="#000000"
      stroke-width="0.8"
      stroke-miterlimit="10"
      d="M174.7,85c-24.5,14-57,18-45.8,45.7 c9.5,23.4-28.2,15.1-45.8-25.7s20.5-65.8,45.8-65.8S196.7,72.5,174.7,85Z"/>
    <path
      id="inner"
      fill="none"
      stroke="#000000"
      stroke-width="0.8"
      stroke-miterlimit="10"
      d="M128.4,64.4c-1.9-0.1-5.9,6-5.9,6s-2.3-3.6-1-7.4 c1.4-3.8,3.4-3.5,5-3.1C128.3,60.2,141.8,65.1,128.4,64.4z"/>
  </g>
​
  <g id="output"></g>
</svg>
​
​
  <script>
    var svg = d3.select("svg");
    var inner = d3.select("#inner")
    var outer = d3.select("#outer")
    var numSamples = 45;
    var numLines = 40;
​
    var scale = 1;
    var xOffset = 150;
    var yOffset = 50;
​
​
​
    var line = d3.svg.line()
      .x(function(d) { return d.x })
      .y(function(d) { return d.y })
      .interpolate("linear-closed");
      //.interpolate("cardinal-closed")
      //.interpolate("basis-closed")
​
    var ins = Sampler.getSamples(inner.node(), numSamples);
    var outs = Sampler.getSamples(outer.node(), numSamples);
​
    var output = d3.select("#output")
​
​
    var lines = [];
    d3.range(numLines).forEach(function(index) {
      var samples = []
      var ratio = index;
      var i, x, y;
      for(i = 0; i < numSamples; i++) {
        x = ins[i].x * (1 - ratio) + outs[i].x * ratio;
        y = ins[i].y * (1 - ratio) + outs[i].y * ratio;
        samples.push({ x: x * scale + xOffset, y: y * scale + yOffset})
      }
      lines.push(samples)
    })
​
    var blended = output.selectAll("path.blend")
    .data(lines)
    blended
    .enter()
    .append("path").classed("blend", true)
    .attr({
      d: function(d) { return line(d) },
      fill: "none",
      stroke: "#ff005d",
      "stroke-width": 3,
    })
​
    var bbox = blended.node().getBoundingClientRect();
​
    var center = {
      x: bbox.left + bbox.width / 2 + 150,
      y: bbox.top + bbox.height / 2 - 5
    }
​
    blended.attr({
      transform: "rotate(0, " + [center.x, center.y] + ")"
    })
​
    output.append("circle")
    .attr({
      r: 5,
      cx: center.x,
      cy: center.y,
      //fill: "white"
      fill: "none"
    })
​
    function transition() {
      blended.transition()
        .ease("cubic")
        .duration(800)
        .delay(function(d,i) { return (numLines - i) * 100 })
        .attrTween("transform", function(d) {
          return function(t) {
            var deg = d3.interpolate(0, 180)(t)
            return "rotate(" + deg + "," + [center.x, center.y] + ")"
          }
        })
        .each("end", function(d,i) {
          if(i !== 0) return;
          blended//.filter(function(d,j) { return i === j })
            .transition()
            .ease("sin")
            .duration(600)
            .delay(function(d,j) { return (numLines - j) * 100 + 800 })
            .attrTween("transform", function(d) {
              return function(t) {
                var deg = d3.interpolate(180, 0)(t)
                return "rotate(" + deg + "," + [center.x, center.y] + ")"
              }
            })
            .each("end", function(d,k) {
              if(i === 0) {
                transition();
              }
            })
​
        })
​
    }
    transition()
​
​
​
​
​
  </script>
</body>
    