HTML5 Canvas锯齿图代码实例

建站知识 2021-07-02 23:00www.168986.cn长沙网站建设

效果图

提示把代码复制到一个html文件中并保存,直接打开即可看到效果。

实现代码

复制代码
代码如下:
<!doctype html>
<html lang="zh">
<head>
<meta charset="gbk">
<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");

//Box
context.strokeStyle = '#00f';
context.lineWidth=10;
context.strokeRect(0, 0, theCanvas.width-0, theCanvas.height-0);
context.fillStyle = "#00f";
for(x=5;x<=canvas.width;x=x+10){
context.beginPath();
context.arc(x,5,5,0,Math.PI,false);
context.closePath();
context.fill();
context.beginPath();
context.arc(x,canvas.height-5,5,0,Math.PI,true);
context.closePath();
context.fill();
}
for(y=5;y<=canvas.height;y=y+10){
context.beginPath();
context.arc(5,y,5,0,Math.PI2,true);
context.arc(canvas.width-5,y,5,0,Math.PI2,true);
context.closePath();
context.fill();
}
}
</script>
</head>
<body>
<div style="position: absolute; : 100px; left: 100px;">
<canvas id="canvas" width="300" height="300">
</div>
</body>
</html>

Copyright © 2016-2025 www.168986.cn 狼蚁网络 版权所有 Power by