<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>图形的旋转</title>
<script>
function draw(id){
var c=document.getElementById('canvas');
if(c==null)
return false;
var cxt=c.getContext("2d");
cxt.fillStyle="aquamarine";
cxt.fillRect(0,0,400,300);
cxt.translate(200,50);
cxt.fillStyle="blue";
for(var i=0;i<500;i++){
cxt.rotate(Math.PI/15);//指定一个角度，改变画布座标
cxt.fillRect(0,0,100,50);
}
}
</script>
</head>
<body οnlοad="draw('canvas')">
<h1>图形的旋转</h1>
<canvas id="canvas" width="400" height="300" style="border:1px solid blue;"></canvas>
</body>
<html>
<head>
<meta charset="UTF-8">
<title>图形的旋转</title>
<script>
function draw(id){
var c=document.getElementById('canvas');
if(c==null)
return false;
var cxt=c.getContext("2d");
cxt.fillStyle="aquamarine";
cxt.fillRect(0,0,400,300);
cxt.translate(200,50);
cxt.fillStyle="blue";
for(var i=0;i<500;i++){
cxt.rotate(Math.PI/15);//指定一个角度，改变画布座标
cxt.fillRect(0,0,100,50);
}
}
</script>
</head>
<body οnlοad="draw('canvas')">
<h1>图形的旋转</h1>
<canvas id="canvas" width="400" height="300" style="border:1px solid blue;"></canvas>
</body>
</html>
