mbostock chained transitions

_.md

[ Launch: Tributary inlet ] 5939835 by gelicia

config.json

{"description":"mbostock chained transitions","endpoint":"","display":"svg","public":true,"require":[],"fileconfigs":{"inlet.js":{"default":true,"vim":false,"emacs":false,"fontSize":12},"style.css":{"default":true,"vim":false,"emacs":false,"fontSize":12},"_.md":{"default":true,"vim":false,"emacs":false,"fontSize":12},"config.json":{"default":true,"vim":false,"emacs":false,"fontSize":12}},"fullscreen":false,"play":false,"loop":false,"restart":false,"autoinit":true,"pause":true,"loop_type":"period","bv":false,"nclones":15,"clone_opacity":0.4,"duration":3000,"ease":"linear","dt":0.01}

inlet.js

// copied from http://bl.ocks.org/mbostock/1125997
// this seems very useful!

var margin = {top: 40, right: 40, bottom: 40, left: 40},
    width = 500 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;
   
var y = d3.scale.ordinal()
    .domain(d3.range(50))
    .rangePoints([0, height]);

var z = d3.scale.linear()
    .domain([10, 0])
    .range(["hsl(62,100%,90%)", "hsl(228,30%,20%)"])
    .interpolate(d3.interpolateHcl);

var svg = d3.select("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

svg.selectAll("circle")
    .data(y.domain())
  .enter().append("circle")
    .attr("r", 25)
    .attr("cx", 0)
    .attr("cy", y)
    .style("fill", function(d) { return z(Math.abs(d % 20 - 10)); })
  .transition()
    .duration(2500)
    .delay(function(d) { return d * 40; })
    .each(slide);

function slide() {
  var circle = d3.select(this);
  
  (function repeat() {
    circle = circle.transition()
        .attr("cx", width)
      .transition()
        .attr("cx", 0)
        .each("start", repeat);
  })();
}

style.css

circle {
  fill: #000;
  stroke: #000;
  stroke-width: 1.5px;
}