有时上网查资料，看到别人的博客上有关键字旋转的效果，觉得蛮不错的。于是网上搜索了一下它的实现，好吧，自己动手写写。
HTML:
复制代码 代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title></title>
<link href="https://www.jb51.net/css/style.css" />
<script type="text/javascript" src="https://www.jb51.net/js/lrtk.js"></script>
</head>
<body>
<!-- 代码开始 -->
<div>
<a >Asp.net webform</a>
<a >Asp.net mvc</a>
<a >EF</a>
<a >Castle</a>
<a >Spring.net</a>
<a >NHibernate</a>
<a >WCF</a>
<a >WPF</a>
<a >AOP</a>
<a >IoC</a>
<a >SQL</a>
<a >Javascript</a>
<a >Jquery</a>
<a >KendoUI</a>
</div>
</body>
</html>
CSS:
复制代码 代码如下:
#div1{height:400px;width:450px; position:relative; margin:10px auto;}
#div1 a{position:absolute;top:0px;left:0px;font-weight:bold;padding:3px 6px; color:black; text-decoration: none;}
#div1 a:hover{border:1px solid #eee;background:#ccc;border-radius:5px;}
既然是关键字，我觉得给他们加上不同的颜色才够酷。初始化一个数组存放颜色值，然后再随机分配给各个标签。
复制代码 代码如下:
var colors = ["#FF60AF","#9F35FF","#FF2D2D","#6C6C6C","#003D79","#00AEAE","#019858"];
var rand = Math.ceil(Math.random()*6);
aA[i].style.color=colors[rand];
JS：
复制代码 代码如下:
var radius = 100;
var dtr = Math.PI/180;
var d=300;
var mcList = [];
var active = false;
var lasta = 1;
var lastb = 1;
var distr = true;
var tspeed=2;
var size=250;
var mouseX=0;
var mouseY=0;
var howElliptical=1;
var aA=null;
var oDiv=null;
window.onload=function ()
{
var i=0;
var oTag=null;
oDiv=document.getElementById('div1');
aA=oDiv.getElementsByTagName('a');
for(i=0;i<aA.length;i++)
{
var colors = ["#FF60AF","#9F35FF","#FF2D2D","#6C6C6C","#003D79","#00AEAE","#019858"];
var rand = Math.ceil(Math.random()*6);
aA[i].style.color=colors[rand];
oTag={};
oTag.offsetWidth=aA[i].offsetWidth;
oTag.offsetHeight=aA[i].offsetHeight;
mcList.push(oTag);
}
sineCosine( 0,0,0 );
positionAll();
oDiv.onmouseover=function ()
{
active=true;
};
oDiv.onmouseout=function ()
{
active=false;
};
oDiv.onmousemove=function (ev)
{
var oEvent=window.event || ev;
mouseX=oEvent.clientX-(oDiv.offsetLeft+oDiv.offsetWidth/2);
mouseY=oEvent.clientY-(oDiv.offsetTop+oDiv.offsetHeight/2);
mouseX/=5;
mouseY/=5;
};
setInterval(update, 10);
};
function update()
{
var a;
var b;
if(active)
{
a = (-Math.min( Math.max( -mouseY, -size ), size ) / radius ) * tspeed;
b = (Math.min( Math.max( -mouseX, -size ), size ) / radius ) * tspeed;
}
else
{
a = lasta * 0.98;
b = lastb * 0.98;
}
lasta=a;
lastb=b;
if(Math.abs(a)<=0.01 && Math.abs(b)<=0.01)
{
return;
}
var c=0;
sineCosine(a,b,c);
for(var j=0;j<mcList.length;j++)
{
var rx1=mcList[j].cx;
var ry1=mcList[j].cy*ca+mcList[j].cz*(-sa);
var rz1=mcList[j].cy*sa+mcList[j].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[j].cx=rx3;
mcList[j].cy=ry3;
mcList[j].cz=rz3;
per=d/(d+rz3);
mcList[j].x=(howElliptical*rx3*per)-(howElliptical*2);
mcList[j].y=ry3*per;
mcList[j].scale=per;
mcList[j].alpha=per;
mcList[j].alpha=(mcList[j].alpha-0.6)*(10/6);
}
doPosition();
depthSort();
}