原创。效果见： http://runjs.cn/detail/9qhedgen 1. [图片] Polygon7.png 2. [代码] [JavaScript]代码 htmlheadmeta charset="utf-8" /title多边形组成的旋转图案/titlescriptvar x=new Array(4, 4, 46, 46, 139,139);var y=new Arra
http://runjs.cn/detail/9qhedgen
1. [图片] Polygon7.png
2. [代码][JavaScript]代码
<html>
<head>
<meta charset="utf-8" />
<title>多边形组成的旋转图案</title>
<script>
var x=new Array(4, 4, 46, 46, 139,139);
var y=new Array(-1,-158,-140,-28, 26, 76);
var degree=0;
function drawCanvas(){
var canvas= document.getElementById("myCanvas");
var g = canvas.getContext("2d");
g.clearRect(0,0,canvas.width, canvas.height);
g.save();
g.translate(200,200);
g.rotate(Math.PI/180*degree++);
g.fillStyle="green";
for (var j=0;j<3;j++){
g.beginPath();
g.moveTo(x[0],y[0]);
for (var i=1;i<x.length;i++)
g.lineTo(x[i],y[i]);
g.closePath();
g.fill();
g.rotate(Math.PI/180*120);
}
g.restore();
}
</script>
</head>
<body onLoad="setInterval('drawCanvas()',200);">
<canvas id="myCanvas" width="600" height="600" >
<p>Your browser does not support the canvas element!</p>
</canvas>
</body>
</html>