如何用html5 canvas画锯齿图

发布网友发布时间：2022-05-09 19:25

共1个回答

热心网友时间：2022-04-20 02:03

<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>锯齿图</title>
<script type="text/javascript">
window.addEventListener("load", eventWindowLoaded, false);
function eventWindowLoaded(){
var x,y;
var theCanvas = document.getElementById("canvas");
var context = theCanvas.getContext("2d");
//context.fillStyle = "#000000";
//context.fillStyle = '#EEEEEE';
//context.fillRect(0, 0, theCanvas.width, theCanvas.height);
//Box
context.strokeStyle = '#000000';
context.lineWidth=10;
context.strokeRect(0, 0, theCanvas.width-0, theCanvas.height-0);
context.fillStyle = "#000000";
for(x=5;x<=canvas.width;x=x+10){
context.beginPath();
context.arc(x,5,5,0,Math.PI*2,true);
context.arc(x,canvas.height-5,5,0,Math.PI*2,true);
context.closePath();
context.fill();
}
for(y=5;y<=canvas.height;y=y+10){
context.beginPath();
context.arc(5,y,5,0,Math.PI*2,true);
context.arc(canvas.width-5,y,5,0,Math.PI*2,true);
context.closePath();
context.fill();
}
}
</script>
</head>
<body>
<div style="position: absolute; top: 0px; left: 0px;">
<canvas id="canvas" width="200" height="200" top=50px; left=50px;>
</div>
</body>
</html>

代码运行出来就是
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