Created
February 21, 2013 00:00
Spiral with Canvas Coordinate Transforms
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| <canvas id="picture" width=960 height=500></canvas> | |
| <script> | |
| var canvas = document.getElementById("picture"); | |
| var ctx = canvas.getContext("2d"); | |
| var width = canvas.width; | |
| var height = canvas.height; | |
| ctx.translate(width/2,height/2); | |
| ctx.globalAlpha = 0.4; | |
| for (var i = 0; i<100; i++) { | |
| ctx.fillStyle = "rgb(" + (2*i) + "," + i + ",0)"; | |
| ctx.translate(i*2/3,0); | |
| ctx.rotate(Math.PI/20); | |
| ctx.fillRect(40,40,2*i,i); | |
| } | |
| </script> | |
| <style> | |
| html, body { | |
| margin: 0; | |
| padding: 0; | |
| width: 100%; | |
| } | |
| </style> |
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