看效果：http://keleyi.com/keleyi/phtml/html5/7.htm 完整程式碼： 複製程式碼代碼如下: 用html5的canvas畫布繪製貝塞爾曲線 原文 <br />function draw(id) <br />{ <br />var canvas=document.getElementById(id); <br />if(canvas==null) <br />return false; <br />if(canvas==null) <br />return false; <br />if(canvas==null) <br />return false; <br />if(canvas==null) <br />return false; <br />if(canvas==null) <br />return false; var context=canvas.getContext('2d'); <br />context.fillStyle="#eeeeff"; <br />context.fillRect(0,0,400,300); <br />var n=0; <br />var dx= 150; <br />var dy=150; <br />var s=100; <br />context.beginPath(); <br />context.globalCompositeOperation='and'; <br />context.fillStyle=text.fillStyle=. '; <br />context.strokeStyle='rgb(0,0,100)'; <br />var x=Math.sin(0); <br />var y=Math.cos(0); <br />var dig= Math.PI/15*11; <br />for(var i=0;i<30;i ) <br />{ <br />var x=Math.sin(i*dig); <br />var y=Math .cos(i*dig); <br />context.bezierCurveTo(dx x*s,dy y*s-100,dx x*s 100,dy y*s,dx x*s,dy y*s); <br />} <br />context.closePath(); <br />context.fill(); context.stroke(); } draw("keleyi_com");
