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Colorcomb
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| license: gpl-3.0 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| margin: 0; | |
| } | |
| </style> | |
| <body> | |
| <script src="https://d3js.org/d3-color.v1.min.js"></script> | |
| <script src="https://d3js.org/d3-timer.v1.min.js"></script> | |
| <script src="https://d3js.org/d3-voronoi.v1.min.js"></script> | |
| <script> | |
| var canvas = document.body.appendChild(document.createElement("canvas")), | |
| width, | |
| height, | |
| context; | |
| var n = 400, | |
| particles = new Array(n), | |
| voronoi = d3.voronoi(); | |
| init(); | |
| d3.timer(function(elapsed) { | |
| for (var i = 0; i < n; ++i) { | |
| var p = particles[i]; | |
| p[0] += p.vx; if (p[0] < 0) p[0] += width; else if (p[0] > width) p[0] -= width; | |
| p[1] += p.vy; if (p[1] < 0) p[1] += height; else if (p[1] > height) p[1] -= height; | |
| p.vx += 0.2 * (Math.random() - .5) - 0.01 * p.vx; | |
| p.vy += 0.2 * (Math.random() - .5) - 0.01 * p.vy; | |
| } | |
| var cells = voronoi.polygons(particles); | |
| context.beginPath(); | |
| cells.forEach(drawCell); | |
| context.globalAlpha = 0.2; | |
| context.strokeStyle = "#000"; | |
| context.lineWidth = 3; | |
| context.stroke(); | |
| context.globalAlpha = 1.0; | |
| context.lineWidth = 1; | |
| cells.forEach(function(cell) { | |
| context.beginPath(); | |
| drawCell(cell); | |
| var c = d3.hcl(d3.lab(90, (cell.data[0] - width / 2) / width * 120, (cell.data[1] - height / 2) / width * 120)); | |
| c.h += elapsed * 0.1; | |
| context.strokeStyle = c + ""; | |
| context.stroke(); | |
| }); | |
| }); | |
| function init() { | |
| width = canvas.width = window.innerWidth; | |
| height = canvas.height = window.innerHeight; | |
| voronoi.size([width, height]); | |
| context = canvas.getContext("2d"); | |
| for (var i = 0; i < n; ++i) { | |
| particles[i] = { | |
| 0: Math.random() * width, | |
| 1: Math.random() * height, | |
| vx: 0, | |
| vy: 0 | |
| }; | |
| } | |
| } | |
| function drawCell(cell) { | |
| if (!cell[0]) return; | |
| context.moveTo(cell[0][0], cell[0][1]); | |
| for (var i = 1, n = cell.length; i < n; ++i) context.lineTo(cell[i][0], cell[i][1]); | |
| context.closePath(); | |
| } | |
| window.addEventListener("resize", init); | |
| </script> |
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