temp

_.md

[ Launch: Moving along path practice ] 6133585 by tarvaina
[ Launch: Tributary inlet ] 6133395 by tarvaina

config.json

{"description":"temp","endpoint":"","display":"svg","public":true,"require":[],"fileconfigs":{"inlet.js":{"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,"thumbnail":"http://i.imgur.com/agfRjl2.png"}

inlet.js

var data = [
  { x: 0, y: 50 },
  { x: 80, y: 0 },
  { x: 120, y: 70 },
  { x: 170, y: 80 },
  { x: 250, y: 50 }
]

var line = d3.svg.line()
  .x(function(v) { return v.x; })
  .y(function(v) { return v.y; });

var svg = d3.select("svg");
var group = svg.append("g")
  .attr("transform", "translate(" + [100, 100] + ")");

var path = group.selectAll("path").data([data]).enter()
  .append("path")
  .attr({
    d: line,
    fill: "none",
    stroke: "#FF0000"
  });

var pathFraction = 0.217654272;
var pathLength = path.node().getTotalLength();
var pointAlongPath = function(fraction) {
  return path.node().getPointAtLength(pathFraction * pathLength);
}


path.attr({
  "stroke-dasharray": 1.1 * pathLength + " " + 1.1 * pathLength,
  "stroke-dashoffset": pathLength * (1.1 - pathFraction)
});

var circle = group.append("circle")
  .attr({
    transform: "translate(0, 0)",
    r: 10
  })
  .transition().duration(2000)
    .attrTween("transform", function(d, i) {
      console.log("tweenOuter");
      return function(t) { 
        console.log("tweenInner");
        return "translate(" + [t * 100, 100] + ")";
      };
    });