- HTML5 Canvas CSS3模拟实现旋转的太阳系动画，相当牛叉我觉得，以前有一个是CSS3写的，各这个差不多，有兴趣在本站网页特效栏目搜索“CSS3太阳系星球效果图”，各个星球围着太阳旋转，速度不一样，有运动轨迹线，学习Canvas动画的好范例。
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<!doctype html><html><head><title>html5旋转的太阳系动画</title><meta charset="utf-8"></head><body><canvas id="canvas" width="1000" height="1000" style="background:#000"> </canvas><script>var cxt=document.getElementById('canvas').getContext('2d')function draw(){for(var i=0;i<8;i++){cxt.beginPath();cxt.strokeStyle="gray";cxt.closePath();cxt.arc(500,500,(i+1)*50,0,360,false);cxt.closePath();cxt.stroke();}}draw();function Star(x,y,radius,cycle,scolor,ecolor){this.x=x;this.y=y;this.radius=radius;this.cycle=cycle;this.scolor=scolor;this.ecolor=ecolor;this.color=null;this.time=0;this.draw=function(){cxt.save();cxt.translate(500,500);cxt.rotate(this.time*(360/this.cycle)*Math.PI/180);cxt.beginPath();cxt.arc(this.x,this.y,this.radius,0,360,false);cxt.closePath();this.color=cxt.createRadialGradient(this.x,this.y,0,this.x,this.y,this.radius);this.color.addColorStop(0,this.scolor);this.color.addColorStop(1,this.ecolor);cxt.fillStyle=this.color;cxt.fill();cxt.restore();this.time+=1;}}function Sun(){Star.call(this,0,0,20,0,"#ff0000","#ff9900");}var sun=new Sun();function di(){Star.call(this,0,-50,10,87,"#A69697","#5C3E40");}var di=new di();function water(){Star.call(this,0,-100,10,224.701,"#C4BBAC","#1F1315");}var water=new water();function jin(){Star.call(this,0,-150,10,365.2422,"#78B1E8","#050C12");}var jin=new jin();function huo(){Star.call(this,0,-200,10,686.98,"#CEC9B6","#76422D");}var huo=new huo();function mu(){Star.call(this,0,-250,10,4332.589,"#C0A48E","#322222");}var mu=new mu();function tu(){Star.call(this,0,-300,10,10759.5,"#F7F9E3","#5C4533");}var tu=new tu();function hai(){Star.call(this,0,-350,10,30799.095,"#A7E1E5","#19243A");}var hai=new hai();function ming(){Star.call(this,0,-400,10,164.8*365,"#0661B2","#1E3B73");}var ming=new ming();function move(){cxt.clearRect(0,0,1000,1000)draw();ming.draw();sun.draw();di.draw();water.draw();jin.draw();huo.draw();mu.draw();tu.draw();hai.draw();}setInterval(move,10);</script></body></html>
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