CSS3学习笔记之立体线框球形动画

<div class="ball-box">
    <div class="ball">
        <div class="line-1"></div>
        <div class="line-2"></div>
        <div class="line-3"></div>
        <div class="line-4"></div>
        <div class="line-5"></div>
        <div class="line-6"></div>
    </div>
</div>

body{ 
    background-color: #333; 
}
.ball-box{ 
    position: absolute; width: 300px; height: 300px; left: 50%; top: 50%; margin: -150px 0 0 -150px;
    perspective:3000px; /*为子元素设置3D透视属性*/
    perspective-origin:50% 50%;
}
/*定义关键帧*/
@keyframes rotate3d{
    0%{ transform: rotateZ(-30deg) rotateY(0deg);}
    100%{ transform: rotateZ(-30deg) rotateY(360deg);}
}
.ball { 
    height: 100%; transform-style: preserve-3d; /*子元素按照3D空间展示属性*/
    animation: rotate3d 30s linear infinite;
}
/*通过after伪类方法在ball内部插入绿色中轴*/
.ball:after{
    content: ‘‘; display: block; position: absolute; width: 1px; height: 500px; 
    background-color: #00ff00; left: 0; top: 0; transform: translate(150px,-100px);
}
/*设置统一样式*/
.ball > div{
    width: 100%; height: 100%; border:1px solid #fff; border-radius: 50%; position: absolute;
}
/*为每一个圆设置旋转角度*/
.ball .line-1{ transform:rotateY(0deg);}
.ball .line-2{ transform:rotateY(30deg);}
.ball .line-3{ transform:rotateY(60deg);}
.ball .line-4{ transform:rotateY(90deg);}
.ball .line-5{ transform:rotateY(120deg);}
.ball .line-6{ transform:rotateY(150deg);}