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Chaos Game
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| function chaosGame(width, height, numSamplesMax) { | |
| var corners = [ | |
| { | |
| x: width / 2, | |
| y: 0 | |
| }, | |
| { | |
| x: 0, | |
| y: height | |
| }, | |
| { | |
| x: width, | |
| y: height | |
| } | |
| ]; | |
| function midPoint(a,b) { | |
| return { | |
| x: (a.x + b.x) / 2, | |
| y: (a.y + b.y) / 2 | |
| }; | |
| } | |
| function randomCorner() { | |
| return corners[Math.floor(Math.random() * corners.length)]; | |
| } | |
| function theAlgorithm() { | |
| return currentPoint = midPoint(currentPoint, randomCorner()); | |
| } | |
| var numSamples = 0; | |
| var currentPoint = randomCorner(); | |
| return function() { | |
| if (++numSamples > numSamplesMax) return; | |
| return theAlgorithm(); | |
| }; | |
| } | |
| var width = 960, | |
| height = 500; | |
| var iterator = chaosGame(width, height, 20000); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| d3.timer(function() { | |
| for (var i = 0; i < 20; ++i) { | |
| var s = iterator(); | |
| if (!s) return true; | |
| svg.append("circle") | |
| .attr("cx", s.x) | |
| .attr("cy", s.y) | |
| .attr("r", 1); | |
| } | |
| }); | |
| </script> |
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