Move the slider to interpolate between a tree layout and a force-directed layout.
Based on Jim Vallandingham's talk, Abusing The Force.
Last active
December 16, 2015 21:13
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Tree-to-Force Interpolation
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <meta charset="utf-8"> | |
| </head> | |
| <body> | |
| <script src="script.js"></script> | |
| </body> | |
| </html> |
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| var width = window.innerWidth * 0.5, | |
| height = window.innerHeight * 0.5, | |
| margin = { top: 50, left: 50, bottom: 50, right: 50 }; | |
| var rangeScale = d3.scale.pow() | |
| .exponent(10) | |
| .clamp(true) | |
| d3.select("body").append("input") | |
| .attr({ type: "range", value: 0, min: 0, max: 1, step: 0.01 }) | |
| .on("input", function() { | |
| mix = rangeScale(this.value); | |
| force.start(); | |
| }); | |
| var g = d3.select("body") | |
| .append("svg") | |
| .attr({ | |
| width: width + margin.left + margin.right, | |
| height: height + margin.top + margin.bottom | |
| }) | |
| .append("g") | |
| .attr({ | |
| transform: "translate(" + [margin.left, margin.top] + ")" | |
| }); | |
| var hierarchyA = function() { | |
| return { | |
| name: "a", | |
| children: [ | |
| { | |
| name: "b", | |
| children: [ {name: "d"}, {name: "e"} ] | |
| }, | |
| { | |
| name: "c", | |
| children: [ | |
| {name: "f", children: [ {name:"t"}, {name:"u"} ] }, | |
| {name: "g"}, | |
| {name: "h"} | |
| ] | |
| }, | |
| { | |
| name: "k", | |
| children: [ | |
| {name: "j", children: [ | |
| {name:"x", children: [{name:"y"}]} | |
| ]} | |
| ] | |
| } | |
| ] | |
| }; | |
| }; | |
| var hierarchyB = function() { | |
| return { | |
| name: "a", | |
| children: [ | |
| { | |
| name: "b", | |
| children: [ {name: "d"}, {name: "e"} ] | |
| }, | |
| { | |
| name: "c", | |
| children: [ {name: "f"}, {name: "g"} ] | |
| }, | |
| { | |
| name: "k", | |
| children: [ {name: "j"} ] | |
| }, | |
| { | |
| name: "n", | |
| children: [ {name: "m"}, {name: "q"} ] | |
| } | |
| ] | |
| }; | |
| }; | |
| var hierarchy = hierarchyA(); | |
| var force = d3.layout.force() | |
| .size([ width, height ]) | |
| .charge(-100) | |
| .linkDistance(40) | |
| .on("tick", draw); | |
| var tree = d3.layout.tree() | |
| .size([ width, height ]); | |
| var newNodes = tree(hierarchy); | |
| var node = g.selectAll(".node"); | |
| var toggle = true; | |
| function update() { | |
| toggle = !toggle; | |
| hierarchy = (toggle) ? hierarchyB() : hierarchyA(); | |
| var oldNodes = node.data(); | |
| var newNodes = tree(hierarchy) | |
| .map(function(d) { | |
| d.treeX = d.x; d.treeY = d.y; | |
| var i = oldNodes.map(function(d) { return d.name; }).indexOf(d.name); | |
| if (i == -1) { | |
| d.x = width / 2 + Math.random(); | |
| d.y = height / 2 + Math.random(); | |
| return d; | |
| } | |
| d.x = oldNodes[i].x; | |
| d.y = oldNodes[i].y; | |
| return d; | |
| }); | |
| node = g.selectAll(".node").data(newNodes, function(d) { return d.name; }); | |
| node.enter().append("g").classed("node", true) | |
| .append("circle").attr({ r: 1 }) | |
| .style({ fill: "#999", stroke: "#444" }) | |
| .transition().duration(1000) | |
| .attr({ r: 10 }); | |
| node.exit().remove(); | |
| node.call(force.drag); | |
| var newLinks = tree.links(newNodes); | |
| link = g.selectAll(".link").data(newLinks); | |
| link.enter().insert("g", "g.node").classed("link", true) | |
| .append("line").style({ stroke: "#444" }); | |
| link.exit().remove(); | |
| force.nodes(node.data()).links(link.data()).start(); | |
| } | |
| update(); | |
| window.setInterval(update, 2000); | |
| var mix = 0; | |
| function draw(event) { | |
| node.each(function(d) { | |
| d.x += (d.treeX - d.x) * mix * event.alpha; | |
| d.y += (d.treeY - d.y) * mix * event.alpha; | |
| }); | |
| node.attr({ | |
| transform: function(d) { return "translate(" + d.x + "," + d.y + ")"; } | |
| }); | |
| link.select("line") | |
| .attr({ | |
| x1: function(d) { return d.source.x; }, | |
| x2: function(d) { return d.target.x; }, | |
| y1: function(d) { return d.source.y; }, | |
| y2: function(d) { return d.target.y; } | |
| }); | |
| } |
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