The Voronoi tesselation shows the closest point on the plane for a given set of points. This example updates the Voronoi diagram in response to mouse interaction! Colors by Cynthia Brewer; algorithm by Steven Fortune; implementation based on work by Nicolas Garcia Belmonte; interaction inspired by Raymond Hill.
Created
September 16, 2011 09:35
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Voronoi Tesselation
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| <!doctype html> | |
| <html lang=en> | |
| <head> | |
| <meta charset=utf-8> | |
| <title>Voronoi Tesselation</title> | |
| <link type="text/css" rel="stylesheet" href="style.css"/> | |
| </head> | |
| <body> | |
| <div id="chart"></div> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://raw.github.com/mbostock/d3/master/lib/colorbrewer/colorbrewer.js"></script> | |
| <script src="script.js"></script> | |
| </body> | |
| </html> |
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| (function() { | |
| var width = 960, | |
| height = 500; | |
| var vertices = d3.range(100).map(function(d) { | |
| return [Math.random() * width, Math.random() * height]; | |
| }); | |
| var svg = d3.select("#chart").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .attr("class", "RdYlBu") | |
| .on("mousemove", function() { vertices[0] = d3.mouse(this); update(); }); | |
| var path = svg.append("g").selectAll("path"); | |
| svg.selectAll("circle") | |
| .data(vertices.slice(1)) | |
| .enter().append("circle") | |
| .attr("transform", function(d) { return "translate(" + d + ")"; }) | |
| .attr("r", 2); | |
| update() | |
| function update() { | |
| path = path.data(d3.geom.voronoi(vertices).map(function(d) { return "M" + d.join("L") + "Z"; }), String); | |
| path.exit().remove(); | |
| path.enter().append("path").attr("class", function(d, i) { return "q" + (i % 9) + "-9"; }).attr("d", String); | |
| path.order(); | |
| } | |
| })() |
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| path { | |
| stroke: #000; | |
| stroke-width: .5px; | |
| } | |
| path:first-child { | |
| fill: #000 !important; | |
| } | |
| circle { | |
| fill: #fff; | |
| stroke: #000; | |
| stroke-width: .5px; | |
| pointer-events: none; | |
| } | |
| .RdYlBu .q0-9{fill:rgb(215,48,39)} | |
| .RdYlBu .q1-9{fill:rgb(244,109,67)} | |
| .RdYlBu .q2-9{fill:rgb(253,174,97)} | |
| .RdYlBu .q3-9{fill:rgb(254,224,144)} | |
| .RdYlBu .q4-9{fill:rgb(255,255,191)} | |
| .RdYlBu .q5-9{fill:rgb(224,243,248)} | |
| .RdYlBu .q6-9{fill:rgb(171,217,233)} | |
| .RdYlBu .q7-9{fill:rgb(116,173,209)} | |
| .RdYlBu .q8-9{fill:rgb(69,117,180)} |
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