Demonstration of unevenness of uniform random distributions for point scattering.
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August 29, 2015 14:03
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Uniform Random Point Distribution
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| background: rgb(255, 255, 255); | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500; | |
| var svg = d3.select("body") | |
| .append("svg") | |
| .attr({width: width, height: height}); | |
| var sample = uniformRandomSampler(width, height, 20000); | |
| d3.timer(function() { | |
| for(var i = 0; i < 100; i++) { | |
| var s = sample(); | |
| if(!s) return true; | |
| svg.append("circle") | |
| .attr({ | |
| r: 1.5, | |
| cx: s[0], | |
| cy: s[1], | |
| opacity: 0.0 | |
| }) | |
| .transition() | |
| .attr({ | |
| opacity: 1.0 | |
| }); | |
| } | |
| }); | |
| function uniformRandomSampler(width, height, maxSamples) { | |
| var samples = 0; | |
| return function() { | |
| if(++samples > maxSamples) return; | |
| return [ | |
| Math.random() * width, | |
| Math.random() * height | |
| ]; | |
| }; | |
| } | |
| </script> |
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