一款超酷的js+css3实现的3D标签云特效兼容ie7/8/9

摘要：今天给大家带来一款超酷的js+css3实现的3D标签云特效，看惯了flash的，来试试这个吧。ie7，8，9兼容哦~html如下：超酷的js...

今天给大家带来一款超酷的js+css3实现的3D标签云特效，

看惯了flash的，来试试这个吧。

ie7，8，9兼容哦~

html如下：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>超酷的js+css3实现的3D标签云特效,前端爱好者www.250ba.com</title>

<style>

body{ font-family:"微软雅黑", Arial, sans-serif;} #main{border:none; background:none;}

body,ul,li,h1,h2,h3,p,form{margin:0;padding:0;}body{background:#fbfbfb;color:#444;font-size:14px;}</p> <p>a{color:#444;text-decoration:none;}a:hover{color:red;}</p> <p>#tagscloud{width:240px;height:250px;position:relative;font-size:12px;color:#333;margin:20px auto 0;text-align:center;}

#tagscloud a{position:absolute;top:0px;left:0px;color:#333;font-family:Arial;text-decoration:none;}

#tagscloud a:hover{color:#fff;padding:5px;display:block;background:#D02F53;}

#tagscloud a.tagc1{margin:0 10px 15px 0;line-height:18px;width:65px;text-align:center;font-size:12px;padding:1px 5px;white-space:nowrap;display:inline-block;border-radius:3px;background:#666;color:#fff;}

#tagscloud a.tagc2{margin:0 10px 15px 0;line-height:18px;width:60px;text-align:center;font-size:12px;padding:1px 5px;white-space:nowrap;display:inline-block;border-radius:3px;background:#F16E50;color:#fff;}

#tagscloud a.tagc5{margin:0 10px 15px 0;line-height:18px;width:70px;text-align:center;font-size:12px;padding:1px 5px;white-space:nowrap;display:inline-block;border-radius:3px;background:#006633;color:#fff;}

</style>

</head>

<body>

<div>超酷的js+css3实现的3D标签云特效

</center>

<a href="#" title="table插件">table插件(1)</a>

<a href="#" title="网友Adam">网友Adam(15)</a>

</div></p> <p><script src='tagscloud.js' language='javascript'></script>

</body>

</html>

js代码如下（tagscloud.js）：

var radius = 90;

var d = 200;

var dtr = Math.PI / 180;

var mcList = [];

var lasta = 1;

var lastb = 1;

var distr = true;

var tspeed = 11;

var size = 200;

var mouseX = 0;

var mouseY = 10;

var howElliptical = 1;

var aA = null;

var oDiv = null;

window.onload=function ()

{

var i=0;

var oTag=null;

oDiv=document.getElementById('tagscloud');

aA=oDiv.getElementsByTagName('a');

for(i=0;i<aA.length;i++)

{

oTag={};

aA[i].onmouseover = (function (obj) {

return function () {

obj.on = true;

this.style.zIndex = 9999;

this.style.color = '#fff';

this.style.background = '#0099ff';

this.style.padding = '5px 5px';

this.style.filter = "alpha(opacity=100)";

this.style.opacity = 1;

}

})(oTag)

aA[i].onmouseout = (function (obj) {

return function () {

obj.on = false;

this.style.zIndex = obj.zIndex;

this.style.color = '#fff';

this.style.background = '#9933FF';

this.style.padding = '5px';

this.style.filter = "alpha(opacity=" + 100 * obj.alpha + ")";

this.style.opacity = obj.alpha;

this.style.zIndex = obj.zIndex;

}

})(oTag)

oTag.offsetWidth = aA[i].offsetWidth;

oTag.offsetHeight = aA[i].offsetHeight;

mcList.push(oTag);

}

sineCosine( 0,0,0 );

positionAll();

(function () {

update();

setTimeout(arguments.callee, 40);

})();

};

function update()

{

var a, b, c = 0;

a = (Math.min(Math.max(-mouseY, -size), size) / radius) * tspeed;

b = (-Math.min(Math.max(-mouseX, -size), size) / radius) * tspeed;

lasta = a;

lastb = b;

if (Math.abs(a) <= 0.01 && Math.abs(b) <= 0.01) {

return;

}

sineCosine(a, b, c);

for (var i = 0; i < mcList.length; i++) {

if (mcList[i].on) {

continue;

}

var rx1 = mcList[i].cx;

var ry1 = mcList[i].cy * ca + mcList[i].cz * (-sa);

var rz1 = mcList[i].cy * sa + mcList[i].cz * ca;</p> <p>var rx2 = rx1 * cb + rz1 * sb;

var ry2 = ry1;

var rz2 = rx1 * (-sb) + rz1 * cb;</p> <p>var rx3 = rx2 * cc + ry2 * (-sc);

var ry3 = rx2 * sc + ry2 * cc;

var rz3 = rz2;</p> <p>mcList[i].cx = rx3;

mcList[i].cy = ry3;

mcList[i].cz = rz3;</p> <p>per = d / (d + rz3);</p> <p>mcList[i].x = (howElliptical * rx3 * per) - (howElliptical * 2);

mcList[i].y = ry3 * per;

mcList[i].scale = per;

var alpha = per;

alpha = (alpha - 0.6) * (10 / 6);

mcList[i].alpha = alpha * alpha * alpha - 0.2;

mcList[i].zIndex = Math.ceil(100 - Math.floor(mcList[i].cz));

}

doPosition();

}

function depthSort()

{

var i=0;

var aTmp=[];

for(i=0;i<aA.length;i++)

{

aTmp.push(aA[i]);

}

aTmp.sort

(

function (vItem1, vItem2)

{

if(vItem1.cz>vItem2.cz)

{

return -1;

}

else if(vItem1.cz<vItem2.cz)

{

return 1;

}

else

{

return 0;

}

);

for(i=0;i<aTmp.length;i++)

{

aTmp[i].style.zIndex=i;

}

function positionAll()

{

var phi = 0;

var theta = 0;

var max = mcList.length;

for (var i = 0; i < max; i++) {

if (distr) {

phi = Math.acos(-1 + (2 * (i + 1) - 1) / max);

theta = Math.sqrt(max * Math.PI) * phi;

} else {

phi = Math.random() * (Math.PI);

theta = Math.random() * (2 * Math.PI);

}

//坐标变换

mcList[i].cx = radius * Math.cos(theta) * Math.sin(phi);

mcList[i].cy = radius * Math.sin(theta) * Math.sin(phi);

mcList[i].cz = radius * Math.cos(phi);</p> <p>aA[i].style.left = mcList[i].cx + oDiv.offsetWidth / 2 - mcList[i].offsetWidth / 2 + 'px';

aA[i].style.top = mcList[i].cy + oDiv.offsetHeight / 2 - mcList[i].offsetHeight / 2 + 'px';

}

function doPosition()

{

var l = oDiv.offsetWidth / 2;

var t = oDiv.offsetHeight / 2;

for (var i = 0; i < mcList.length; i++) {

if (mcList[i].on) {

continue;

}

var aAs = aA[i].style;

if (mcList[i].alpha > 0.1) {

if (aAs.display != '')

aAs.display = '';

} else {

if (aAs.display != 'none')

aAs.display = 'none';

continue;

}

aAs.left = mcList[i].cx + l - mcList[i].offsetWidth / 2 + 'px';

aAs.top = mcList[i].cy + t - mcList[i].offsetHeight / 2 + 'px';

//aAs.fontSize=Math.ceil(12*mcList[i].scale/2)+8+'px';

//aAs.filter="progid:DXImageTransform.Microsoft.Alpha(opacity="+100*mcList[i].alpha+")";

aAs.filter = "alpha(opacity=" + 100 * mcList[i].alpha + ")";

aAs.zIndex = mcList[i].zIndex;

aAs.opacity = mcList[i].alpha;

}

function sineCosine( a, b, c)

{

sa = Math.sin(a * dtr);

ca = Math.cos(a * dtr);

sb = Math.sin(b * dtr);

cb = Math.cos(b * dtr);

sc = Math.sin(c * dtr);

cc = Math.cos(c * dtr);

}