日期:2014-05-17 浏览次数:20594 次
<!DOCTYPE HTML> <html> <head> <object id="WebBrowser" width=0 height=0 classid="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2"></object> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript"> (function(){ var canvas=null, context=null, angle=0; num=0; value=1; function resetCanvas(){ canvas=document.getElementById("simple"); canvas.width=window.innerWidth; canvas.height=window.innerHeight; context=canvas.getContext("2d"); } function animate(){ context.save(); try{ //清除画布 context.clearRect(0, 0, canvas.width, canvas.height); if(num==100){ value=-1; } else if(num==0) { value=1; } num +=value; context.scale(num*1/50,num*1/50) //设置原点 context.translate(canvas.width * 0.5, canvas.height * 0.5); //旋转角度 context.rotate(angle); //设置填充颜色 context.fillStyle = "#FF0000"; //绘制矩形 context.fillRect(0, 0, 100, 100); angle += 0.05 * Math.PI; } finally{ context.restore(); } } //当窗口改变时 $(window).bind("resize",resetCanvas).bind("reorient",resetCanvas); $(document).ready(function(){ window.scrollTo(0,1); resetCanvas(); setInterval(animate,40); }); })(); </script> </script> </head> <body> <canvas id="simple"></canvas> </body> </html>