JavaScript特效之图片特效放大，缩小，旋转

效果图如下：

效果代码如下：

<!doctype html>
<html lang="en">
 <head>
  <meta charset="UTF-8">
  <meta name="Generator" content="EditPlus®">
  <meta name="Author" content="">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
  <title>Document</title>

<style type="text/css">
    html {
        overflow: hidden;
    }
    body {
        position: absolute;
        margin: 0px;
        padding: 0px;
        background: #111;
        width: 100%;
        height: 100%;
    }
    #screen {
        position: absolute;
        left: 10%;
        top: 10%;
        width: 80%;
        height: 80%;
        background: #000;
    }
    #screen img {
        position: absolute;
        cursor: pointer;
        visibility: hidden;
        width: 0px;
        height: 0px;
    }
    #screen .tvover {
        border: solid #876;
        opacity: 1;
        filter: alpha(opacity=100);
    }
    #screen .tvout {
        border: solid #fff;
        opacity: 0.7;
    }
    #bankImages {
        display: none;
    }
</style>

<script type="text/javascript">
var Library = {};
Library.ease = function () {
    this.target = 0;
    this.position = 0;
    this.move = function (target, speed)
    {
        this.position += (target - this.position) * speed;
    }
}

var tv = {
    O : [],
    screen : {},
    grid : {
        size       : 4,
        borderSize : 6,
        zoomed     : false
    },
    angle : {
        x : new Library.ease(),
        y : new Library.ease()
    },
    camera : {
        x    : new Library.ease(),
        y    : new Library.ease(),
        zoom : new Library.ease(),
        focalLength : 750
    },

    init : function ()
    {
        this.screen.obj = document.getElementById('screen');
        var img = document.getElementById('bankImages').getElementsByTagName('img');
        this.screen.obj.onselectstart = function () { return false; }
        this.screen.obj.ondrag = function () { return false; }
        var ni = 0;
        var n = (tv.grid.size / 2) - .5;
        for (var y = -n; y <= n; y++)
        {
            for (var x = -n; x <= n; x++)
            {
                var o = document.createElement('img');
                var i = img[(ni++) % img.length];
                o.className = 'tvout';
                o.src = i.src;
                tv.screen.obj.appendChild(o);
                o.point3D = {
                    x  : x,
                    y  : y,
                    z  : new Library.ease()
                };
                o.point2D = {};
                o.ratioImage = 1;
                tv.O.push(o);
                o.onmouseover = function ()
                {
                    if (!tv.grid.zoomed)
                    {
                        if (tv.o)
                        {
                            tv.o.point3D.z.target = 0;
                            tv.o.className = 'tvout';
                        }
                        this.className = 'tvover';
                        this.point3D.z.target = -.5;
                        tv.o = this;
                    }
                }
                o.onclick = function ()
                {
                    if (!tv.grid.zoomed)
                    {
                        tv.camera.x.target = this.point3D.x;
                        tv.camera.y.target = this.point3D.y;
                        tv.camera.zoom.target = tv.screen.w * 1.25;
                        tv.grid.zoomed = this;
                    } else {
                        if (this == tv.grid.zoomed){
                            tv.camera.x.target = 0;
                            tv.camera.y.target = 0;
                            tv.camera.zoom.target = tv.screen.w / (tv.grid.size + .1);
                            tv.grid.zoomed = false;
                        }
                    }
                }
                o.calc = function ()
                {
                    this.point3D.z.move(this.point3D.z.target, .5);
                    var x = (this.point3D.x - tv.camera.x.position) * tv.camera.zoom.position;
                    var y = (this.point3D.y - tv.camera.y.position) * tv.camera.zoom.position;
                    var z = this.point3D.z.position * tv.camera.zoom.position;
                    var xy = tv.angle.cx * y  - tv.angle.sx * z;
                    var xz = tv.angle.sx * y  + tv.angle.cx * z;
                    var yz = tv.angle.cy * xz - tv.angle.sy * x;
                    var yx = tv.angle.sy * xz + tv.angle.cy * x;
                    this.point2D.scale = tv.camera.focalLength / (tv.camera.focalLength + yz);
                    this.point2D.x = yx * this.point2D.scale;
                    this.point2D.y = xy * this.point2D.scale;
                    this.point2D.w = Math.round(
                                       Math.max(
                                         0,
                                         this.point2D.scale * tv.camera.zoom.position * .8
                                       )
                                     );
                    if (this.ratioImage > 1)
                        this.point2D.h = Math.round(this.point2D.w / this.ratioImage);
                    else
                    {
                        this.point2D.h = this.point2D.w;
                        this.point2D.w = Math.round(this.point2D.h * this.ratioImage);
                    }
                }
                o.draw = function ()
                {
                    if (this.complete)
                    {
                        if (!this.loaded)
                        {
                            if (!this.img)
                            {
                                this.img = new Image();
                                this.img.src = this.src;
                            }
                            if (this.img.complete)
                            {
                                this.style.visibility = 'visible';
                                this.ratioImage = this.img.width / this.img.height;
                                this.loaded = true;
                                this.img = false;
                            }
                        }
                        this.style.left = Math.round(
                                            this.point2D.x * this.point2D.scale +
                                            tv.screen.w - this.point2D.w * .5
                                          ) + 'px';
                        this.style.top  = Math.round(
                                            this.point2D.y * this.point2D.scale +
                                            tv.screen.h - this.point2D.h * .5
                                          ) + 'px';
                        this.style.width  = this.point2D.w + 'px';
                        this.style.height = this.point2D.h + 'px';
                        this.style.borderWidth = Math.round(
                                                   Math.max(
                                                     this.point2D.w,
                                                     this.point2D.h
                                                   ) * tv.grid.borderSize * .01
                                                 ) + 'px';
                        this.style.zIndex = Math.floor(this.point2D.scale * 100);
                    }
                }
            }
        }
        tv.resize();
        mouse.y = tv.screen.y + tv.screen.h;
        mouse.x = tv.screen.x + tv.screen.w;
        tv.run();
    },
    resize : function ()
    {
        var o = tv.screen.obj;
        tv.screen.w = o.offsetWidth / 2;
        tv.screen.h = o.offsetHeight / 2;
        tv.camera.zoom.target = tv.screen.w / (tv.grid.size + .1);
        for (tv.screen.x = 0, tv.screen.y = 0; o != null; o = o.offsetParent)
        {
            tv.screen.x += o.offsetLeft;
            tv.screen.y += o.offsetTop;
        }
    },

    run : function ()
    {
        tv.angle.x.move(-(mouse.y - tv.screen.h - tv.screen.y) * .0025, .1);
        tv.angle.y.move( (mouse.x - tv.screen.w - tv.screen.x) * .0025, .1);
        tv.camera.x.move(tv.camera.x.target, tv.grid.zoomed ? .25 : .025);
        tv.camera.y.move(tv.camera.y.target, tv.grid.zoomed ? .25 : .025);
        tv.camera.zoom.move(tv.camera.zoom.target, .05);
        tv.angle.cx = Math.cos(tv.angle.x.position);
        tv.angle.sx = Math.sin(tv.angle.x.position);
        tv.angle.cy = Math.cos(tv.angle.y.position);
        tv.angle.sy = Math.sin(tv.angle.y.position);
        for (var i = 0, o; o = tv.O[i]; i++)
        {
            o.calc();
            o.draw();
        }
        setTimeout(tv.run, 32);
    }
}

var mouse = {
    x : 0,
    y : 0
}
document.onmousemove = function(e)
{
    if (window.event) e = window.event;
    mouse.x = e.clientX;
    mouse.y = e.clientY;
    return false;
}

</script>
</head>
<body>
<div id="screen"></div>
<div id="bankImages">
<!--这里为了演示速度多，只调用了两张图片，用时候你可以加上你的图片-->

<img src="D:/Documents/Pictures/神祗.jpg" width="830" height="242" border="0" alt="">
</div>
<script type="text/javascript">
    onresize = tv.resize;
    tv.init();
</script>

 </body>
</html>