D3 Examples - Circle Wave2.2

xxxxxxxxxx
 
<!DOCTYPE html>
<svg width="550" height="500"></svg>
<script src="https://d3js.org/d3.v5.min.js"></script>
<script>
​
var svg = d3.select("svg"),
    width = +svg.attr("width"),
    height = +svg.attr("height"),
    angles = d3.range(0, 2 * Math.PI, Math.PI / 200);
​
var path = svg.append("g")
    .attr("transform", "translate(" + width / 4 + "," + height / 4 + ")")
    .attr("fill", "none")
    .attr("stroke-width", 13)
    .attr("stroke-linejoin", "round")
  .selectAll("path")
  .data(["cornflowerblue", "aqua", "navy"])
//   .data(["red", "purple", "deeppink"])
  .enter().append("path")
    .attr("stroke", function(d) { return d; })
    .style("mix-blend-mode", "darken")
    .attr("fill", "lightcyan")
    .datum(function(d, i) {
      return d3.radialLine()
          .curve(d3.curveLinearClosed)
          .angle(function(a) { return a; })
          .radius(function(a) {
            var t = d3.now() / 3500;
            return 100 + Math.cos(a * 5 - i * 2 * Math.PI / 3 + t) * Math.pow((1 + Math.cos(a - t)) / 3, 2) * 30;
          });
    });
​
d3.timer(function() {
  path.attr("d", function(d) {
    return d(angles);
  });
});
​
</script>
​
    