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Wiggling Circles
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| <!doctype html> | |
| <meta charset="utf-8"> | |
| <script src="https://d3js.org/d3.v4.js"></script> | |
| <canvas id="painting" width=960 height=500></canvas> | |
| <script> | |
| var colorScale = d3.scaleOrdinal() | |
| //.range(["red", "green", "blue"]); | |
| .range(["#490A3D","#BD1550","#E97F02","#F8CA00","#8A9B0F"]); | |
| var canvas = d3.select("#painting").node(); | |
| var ctx = canvas.getContext("2d"); | |
| //ctx.globalAlpha = 0.3; | |
| ctx.globalCompositeOperation = "hard-light"; | |
| var data = d3.range(400) | |
| .map(function(d) { | |
| return { | |
| x: 960 * Math.random(), | |
| y: 500 * Math.random(), | |
| width: 7+50 * Math.random(), | |
| height: 7+50 * Math.random(), | |
| group: Math.floor(10 * Math.random()) | |
| } | |
| }) | |
| var render = function(arr) { | |
| ctx.clearRect(0,0,canvas.width,canvas.height); | |
| arr.forEach(function(d) { | |
| ctx.fillStyle = colorScale(d.group); | |
| ctx.beginPath(); | |
| ctx.arc(d.x, d.y, d.width/2, 0, 2*Math.PI); | |
| ctx.fill(); | |
| }); | |
| }; | |
| d3.timer(function(t) { | |
| data.forEach(function(d) { | |
| d.x += (2*Math.random() - 1); | |
| d.y += (2*Math.random() - 1); | |
| }); | |
| render(data); | |
| }); | |
| </script> |
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