一款超酷的js+css3实现的3D标签云特效兼容ie7/8/9

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：

复制代码代码如下:







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;}

a{color:#444;text-decoration:none;}a:hover{color:red;}

#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;}

js代码如下（tagscloud.js）：

复制代码代码如下:
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{
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;

var rx2 = rx1 * cb + rz1 * sb;
var ry2 = ry1;
var rz2 = rx1 * (-sb) + rz1 * cb;

var rx3 = rx2 * cc + ry2 * (-sc);
var ry3 = rx2 * sc + ry2 * cc;
var rz3 = rz2;

mcList[i].cx = rx3;
mcList[i].cy = ry3;
mcList[i].cz = rz3;

per = d / (d + rz3);

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{
aTmp.push(aA[i]);
}
aTmp.sort
(
function (vItem1, vItem2)
{
if(vItem1.cz>vItem2.cz)
{
return -1;
}
else if(vItem1.cz{
return 1;
}
else
{
return 0;
}
}
);
for(i=0;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);

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);
}