CSS3实现的线框球形旋转效果

CSS3实现的线框球形旋转效果

请使用现代浏览器，例如， chrome观看效果

<div class="ball">
  <div class="ball_box">
    <div class="x1"></div>
    <div class="x2"></div>
    <div class="x3"></div>
    <div class="x4"></div>
    <div class="x5"></div>
    <div class="x6"></div>
    <div class="x7"></div>
    <div class="x8"></div>
    <div class="x9"></div>
    
    <div class="y1"></div>
    <div class="y2"></div>
    <div class="y3"></div>
    <div class="y4"></div>
    <div class="y5"></div>
    <div class="y6"></div>
    <div class="y7"></div>
    <div class="y8"></div>
    <div class="y9"></div>
  </div>
</div>

<script src="http://cdn.gbtags.com/prefixfree/1.0.7/prefixfree.min.js"></script>

html, body {height:100%;}
body {padding:0;margin:0;background:#333;position:relative;}
.ball {height:500px;width:500px;position:absolute;top:50%;left:50%;
margin:-250px 0 0 -250px;transition:all .6s;}
.ball:hover {transform:scale(1.2);}
 
.ball_box {width:100%;height:100%;animation:rotate3d 20s infinite linear;}
.ball div {width:100%;height:100%;border-radius:100%;
border:solid 1px #fff;position:absolute;top:50%;left:50%;
margin:-50% 0 0 -50%;transform-style:preserve-3d;}
.ball .x1 {transform:rotateY(0)}
.ball .x2 {transform:rotateY(20deg)}
.ball .x3 {transform:rotateY(40deg)}
.ball .x4 {transform:rotateY(60deg)}
.ball .x5 {transform:rotateY(80deg)}
.ball .x6 {transform:rotateY(100deg)}
.ball .x7 {transform:rotateY(120deg)}
.ball .x8 {transform:rotateY(140deg)}
.ball .x9 {transform:rotateY(160deg)}
 
.ball .y1 {transform:rotateX(90deg) translateZ(200px) scale(0.60);}
.ball .y2 {transform:rotateX(90deg) translateZ(150px) scale(0.80);}
.ball .y3 {transform:rotateX(90deg) translateZ(100px) scale(0.92);}
.ball .y4 {transform:rotateX(90deg) translateZ(50px) scale(0.98);}
.ball .y5 {transform:rotateX(90deg) translateZ(0);}
.ball .y6 {transform:rotateX(90deg) translateZ(-50px) scale(0.98);}
.ball .y7 {transform:rotateX(90deg) translateZ(-100px) scale(0.92);}
.ball .y8 {transform:rotateX(90deg) translateZ(-150px) scale(0.80);}
.ball .y9 {transform:rotateX(90deg) translateZ(-200px) scale(0.60);}
 
@keyframes rotate3d {
	0% {transform:rotate(-20deg) rotateX(-20deg) rotateY(0)}
	100% {transform:rotate(-20deg) rotateX(-20deg) rotateY(360deg)}
}

.