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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.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: 100px; left: 100px;"> <canvas id="canvas" width="300" height="300"> </div> </body> </html> |
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