慕课网看到的，只是自己敲了一遍。
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <canvas id="canvas" style="border:1px solid #ccc;display:block;"> 当前浏览器不支持canvas，请更换浏览器后在试。 </canvas> <script> var tangram = [ {p:[{x:0,y:0},{x:800,y:0},{x:400,y:400}],color:‘#caff67‘}, {p:[{x:0,y:0},{x:400,y:400},{x:0,y:800}],color:‘#67becf‘}, {p:[{x:800,y:0},{x:800,y:400},{x:600,y:600},{x:600,y:200}],color:‘#ef3d61‘}, {p:[{x:600,y:200},{x:600,y:600},{x:400,y:400}],color:‘#f9f51a‘}, {p:[{x:400,y:400},{x:600,y:600},{x:400,y:800},{x:200,y:600}],color:‘#a594c0‘}, {p:[{x:200,y:600},{x:400,y:800},{x:0,y:800}],color:‘#fa8ecc‘}, {p:[{x:800,y:400},{x:800,y:800},{x:400,y:800}],color:‘#f6ca29‘} ]; window.onload = function () { var canvas = document.getElementById(‘canvas‘); var context = canvas.getContext(‘2d‘); canvas.width = 800; canvas.height = 800; for (var i = 0; i < tangram.length; i++) draw( tangram[i], context); } function draw(price, cxt) { cxt.beginPath(); cxt.moveTo(price.p[0].x, price.p[0].y); for (var i = 1; i < price.p.length; i++) cxt.lineTo(price.p[i].x, price.p[i].y); cxt.closePath(); cxt.fillStyle = price.color; cxt.fill(); } </script> </body> </html>
如下图所示：
原文：http://www.cnblogs.com/baixc/p/4834550.html