利用javaScript+css实现图片跟随鼠标联动效果页面

以前做小型的项目的时候总想着可以做一个很炫酷的主页面来，以前做过一个汽车销售管理系统的主页面，觉得很不错。虽然写这个的人不是我，但是我们觉得可以保存下来以便日后使用和参考。先看一下效果图！这个是可以跟随鼠标动作移动的。

纯手工的css样式结构！

<style type="text/css">html {overflow: hidden;}body {position: absolute;margin: 0px;padding: 0px;background: #EDF3FF;width: 100%;height: 100%;}#screen {position: absolute;left: 10%;top: 10%;width: 80%;height: 80%;background: #EDF3FF;}#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>

然后是JavaScript也是核心的部分。

<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 = {/* ==== variables ==== */O : [],screen : {},grid : {size       : 4,  // 4x4 gridborderSize : 6,  // borders sizezoomed     : 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 // camera Focal Length},/* ==== init script ==== */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; }/* ==== create images grid ==== */var ni = 0;var n = (tv.grid.size / 2) - .5;for (var y = -n; y <= n; y++){for (var x = -n; x <= n; x++){/* ==== create HTML image element ==== */var o = document.createElement('img');var i = img[(ni++) % img.length];o.className = 'tvout';o.src = i.src;tv.screen.obj.appendChild(o);/* ==== 3D coordinates ==== */o.point3D = {x  : x,y  : y,z  : new Library.ease()};/* ==== push object ==== */o.point2D = {};o.ratioImage = 1;tv.O.push(o);/* ==== on mouse over event ==== */o.onmouseover = function (){if (!tv.grid.zoomed){if (tv.o){/* ==== mouse out ==== */tv.o.point3D.z.target = 0;tv.o.className = 'tvout';}/* ==== mouse over ==== */this.className = 'tvover';this.point3D.z.target = -.5;tv.o = this;}}/* ==== on click event ==== */o.onclick = function (){if (!tv.grid.zoomed){/* ==== zoom in ==== */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){/* ==== zoom out ==== */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;}}}/* ==== 3D transform function ==== */o.calc = function (){/* ==== ease mouseover ==== */this.point3D.z.move(this.point3D.z.target, .5);/* ==== assign 3D coords ==== */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;/* ==== perform rotations ==== */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;/* ==== 2D transformation ==== */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));/* ==== image size ratio ==== */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);}}/* ==== rendering ==== */o.draw = function (){if (this.complete){/* ==== paranoid image load ==== */if (!this.loaded){if (!this.img){/* ==== create internal image ==== */this.img = new Image();this.img.src = this.src;}if (this.img.complete){/* ==== get width / height ratio ==== */this.style.visibility = 'visible';this.ratioImage = this.img.width / this.img.height;this.loaded = true;this.img = false;}}/* ==== HTML rendering ==== */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);}}}}/* ==== start script ==== */tv.resize();mouse.y = tv.screen.y + tv.screen.h;mouse.x = tv.screen.x + tv.screen.w;tv.run();},/* ==== resize window ==== */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;}},/* ==== main loop ==== */run : function (){/* ==== motion ease ==== */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);/* ==== angles sin and cos ==== */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);/* ==== loop through all images ==== */for (var i = 0, o; o = tv.O[i]; i++){o.calc();o.draw();}/* ==== loop ==== */setTimeout(tv.run, 32);}
}/* ==== global mouse position ==== */
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>

页面的二结构就比较简单了。而图片也可以选择自己喜欢的图片。

<body><div id="screen"></div><div id="bankImages"><img src="data:images/carP/1.jpg" /><img src="data:images/carP/2.jpg" /><img src="data:images/carP/3.jpg" /><img src="data:images/carP/4.jpg" /><img src="data:images/carP/5.jpg" /><img src="data:images/carP/6.jpg" /><img src="data:images/carP/7.jpg" /><img src="data:images/carP/8.jpg" /><img src="data:images/carP/9.jpg" /><img src="data:images/carP/10.jpg" /><img src="data:images/carP/11.jpg" /><img src="data:images/carP/12.jpg" /><img src="data:images/carP/13.jpg" /><img src="data:images/carP/14.jpg" /><img src="data:images/carP/15.jpg" /><img src="data:images/carP/16.jpg" />
</div><script type="text/javascript">/* ==== start script ==== */onresize = tv.resize;tv.init();
</script></body>

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