Tributary inlet

_.md

[ Launch: Tributary inlet ] 5098103 by hemulin

config.json

{"description":"Tributary inlet","endpoint":"","display":"svg","public":true,"require":[],"fileconfigs":{"inlet.js":{"default":true,"vim":false,"emacs":false,"fontSize":12},"data.css":{"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}

data.css

.node {
  stroke: #fff;
  stroke-width: 2px;
}

.link {
  fill: none;
  stroke: #000;
}

inlet.js

var width = 960,
    height = 500;

var tree = d3.layout.tree()
    .size([width - 20, height - 20]);

var root = {},
    nodes = tree(root);

root.parent = root;
root.px = root.x;
root.py = root.y;

var diagonal = d3.svg.diagonal();

var svg = d3.select("svg").append("svg")
    .attr("width", width)
    .attr("height", height)
  .append("g")
    .attr("transform", "translate(10,10)");

var node = svg.selectAll(".node"),
    link = svg.selectAll(".link");

var duration = 250,
    timer = setInterval(update, duration);

function update() {
  if (nodes.length >= 500) return clearInterval(timer);

  // Add a new node to a random parent.
  var n = {id: nodes.length},
      p = nodes[Math.random() * nodes.length | 0];
  if (p.children) p.children.push(n); else p.children = [n];
  nodes.push(n);

  // Recompute the layout and data join.
  node = node.data(tree.nodes(root), function(d) { return d.id; });
  link = link.data(tree.links(nodes), function(d) { return d.source.id + "-" + d.target.id; });

  // Add entering nodes in the parent’s old position.
  node.enter().append("circle")
      .attr("class", "node")
      .attr("r", 4)
      .attr("cx", function(d) { return d.parent.px; })
      .attr("cy", function(d) { return d.parent.py; });

  // Add entering links in the parent’s old position.
  link.enter().insert("path", ".node")
      .attr("class", "link")
      .attr("d", function(d) {
        var o = {x: d.source.px, y: d.source.py};
        return diagonal({source: o, target: o});
      });

  // Transition nodes and links to their new positions.
  var t = svg.transition()
      .duration(duration);

  t.selectAll(".link")
      .attr("d", diagonal);

  t.selectAll(".node")
      .attr("cx", function(d) { return d.px = d.x; })
      .attr("cy", function(d) { return d.py = d.y; });
}