CSS3D--翻转

3D翻转
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        *{margin:0;padding:0}
        html,body{background: #333;}
        #box{
            width:133px;
            height:200px;
            position: relative;
            margin:200px auto;
            user-select: none;
            -webkit-user-select: none;
            transform-style: preserve-3d;
            transform: perspective(800px) rotateX(-20deg);
        }
        #box img{
            display: block;
            width:133px;
            height:200px;
            position: absolute;
            -webkit-box-reflect:below 10px -webkit-gradient(linear,0 0, 0 100%,from(rgba(0,0,0,0)), color-stop(.4, transparent), to(rgba(0,0,0,0.2)));
        }
    </style>
</head>
<body>
<div id="box">
    <img src="images/11.jpg">
    <img src="images/12.jpg">
    <img src="images/13.jpg">
    <img src="images/14.jpg">
    <img src="images/15.jpg">
    <img src="images/16.jpg">
    <img src="images/17.jpg">
    <img src="images/18.jpg">
    <img src="images/19.jpg">
    <img src="images/20.jpg">
</div>
<script>
    var box = document.getElementById('box');
    var length = document.getElementsByTagName('img').length;
    var imgs = document.getElementsByTagName('img');
    var r = 360/length;
    var mX = null;
    var mY = null;
    var stepX = null;
    var stepY = null;

    for(var i = 0;i < length;i++){
        var str = "rotateY("+r*i+"deg) translateZ(300px)";
        cssTransform(imgs[i],str);
    }
    document.ondragstart = function(){
        return false;
    };
    document.onmousedown = function(ev){
        var mosX = ev.clientX;
        var mosY = ev.clientY;
        document.onmousemove = function(ev){
            var mouseX = ev.clientX;
            var mouseY = ev.clientY;
           /*上下移动是Y,左右移动是X*/
            mX -= mouseY - mosY;
            mY += mouseX - mosX;

            stepX = mX * 0.2;
            stepY = mY * 0.2;
            var str = "perspective(800px) rotateX("+stepX+"deg) rotateY("+stepY+"deg)";
            cssTransform(box,str);
            mosX = mouseX;
            mosY = mouseY;
        }
    };
    document.onmouseup = function(){
        document.onmousemove = null;
    };
    function cssTransform(obj,str){
       var arr = ['webkit','moz','ms','o',''];
        for(var i = 0;i < arr.length;i++){
            obj.style[arr[i] + 'Transform'] = str;
        }
    }
</script>
</body>
</html>
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