源自：2-2 绘制直线、多边形和七巧板
为啥显示不出来 求大神帮看看
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<link rel="stylesheet" type="text/css" href="reset.css">
</head>
<body>
<canvas id="canvas" style="border: 1px solid #aaa;display: block;margin:50px auto">
</canvas>
<script type="text/javascript">
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:60},{x:400,y:800},{x:0,y:800}],color:"#fa8ecc"},
{p:[{x:800,y:0},{x:400,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(piece,cxt) {
cxt.beginPath();
cxt.moveTo(piece.p[0].x,piece.p[0].y);
for( var i = 1 ;i<piece.length;i++){
cxt.lineTo( piece.p[i].x,piece.p[i].y);
}
cxt.closePath();
cxt.fillStyle = piece.color;
cxt.fill();
}
</script>
</body>
</html>
提问者：qq_佛祖也Crazy_0
2018-08-12 22:51