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September 6, 2016 19:42
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layered voronoi relaxation
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| license: mit |
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; | |
| } | |
| svg { background: white; } | |
| .layer { fill: none; } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| (function() { | |
| var options = { | |
| width: 500, | |
| height: 500, | |
| points: 30, | |
| density: .5, | |
| iterations: 300, | |
| opacity: .1, | |
| colorScale: d3.interpolateRgb('black', 'black') | |
| }; | |
| var points = []; | |
| var width = options.width, height = options.height; | |
| var count = options.points; | |
| while(count-- > 0) { | |
| points.push([ | |
| Math.random() * width, | |
| Math.random() * height | |
| ]); | |
| }; | |
| var layers = [points]; | |
| var voronoi = d3.voronoi().size([width, height]); | |
| var iterations = options.iterations; | |
| while(iterations-- > 0) { | |
| points = voronoi.polygons(points).map(function(poly) { | |
| return d3.polygonCentroid(poly); | |
| }); | |
| layers.push(points); | |
| } | |
| var scale = d3.scaleSequential(options.colorScale).domain([0, options.relaxations]); | |
| var $svg = d3.select('body').append('svg') | |
| .attr('width', options.width) | |
| .attr('height',options.height); | |
| $svg.selectAll('.layer') | |
| .data(layers) | |
| .enter() | |
| .append('path') | |
| .attr('class', 'layer') | |
| .attr('stroke', function(l, i) { | |
| var color = d3.rgb(scale(i)); | |
| color.opacity = options.opacity; | |
| return color; | |
| }) | |
| .attr('d', function(points) { | |
| return voronoi.polygons(points).map(function(p) { | |
| return 'M' + p.map(function(p) { | |
| return p.join(','); | |
| }).join('L') + 'Z'; | |
| }).join(''); | |
| }); | |
| }()); | |
| </script> | |
| </body> |
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