Awan teg sfera 3D yang sangat menarik serasi dengan petua IE8_javascript

Saya melihat awan teg yang sangat menarik, sfera 3D, serasi dengan IE 8, tersedia untuk ujian peribadi! Versi lain belum diuji. Saya fikir ia menarik, jadi saya merakamnya dan mengkaji alamat artikel yang saya baca akan disiarkan di bawah artikel ini
Seterusnya ialah kod, html css js, yang tidak berdasarkan jQuery, jadi tidak perlu memperkenalkannya Anda boleh melihat kesannya selepas menyalin kod:

<div id="div1">
<a href="http://www.cnblogs.com/ntt1219/" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >忘了滋味</a>
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</div>

body {background: #000 url(index.png) no-repeat center 230px;}
#div1 {position:relative; width:450px; height:450px; margin: 20px auto 0; }
#div1 a {position:absolute; top:0px; left:0px; font-family: Microsoft YaHei; color:#fff; font-weight:bold; text-decoration:none; padding: 3px 6px; }
#div1 a:hover {border: 1px solid #eee; background: #000; }
#div1 .blue {color:blue;}
#div1 .red {color:red;}
#div1 .yellow {color:yellow;}

var radius = 120;
var dtr = Math.PI/180;
var d=300;
var mcList = [];
var active = false;
var lasta = 1;
var lastb = 1;
var distr = true;
var tspeed=10;
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++)
{
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, 30);
};
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();
}
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;
var i=0;

var aTmp=[];
var oFragment=document.createDocumentFragment();

//随机排序
for(i=0;i<aA.length;i++)
{
aTmp.push(aA[i]);
}

aTmp.sort
(
function ()
{
return Math.random()<0.5&#63;1:-1;
}
);

for(i=0;i<aTmp.length;i++)
{
oFragment.appendChild(aTmp[i]);
}

oDiv.appendChild(oFragment);

for( var i=1; i<max+1; i++){
if( distr )
{
phi = Math.acos(-1+(2*i-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-1].cx = radius * Math.cos(theta)*Math.sin(phi);
mcList[i-1].cy = radius * Math.sin(theta)*Math.sin(phi);
mcList[i-1].cz = radius * Math.cos(phi);

aA[i-1].style.left=mcList[i-1].cx+oDiv.offsetWidth/2-mcList[i-1].offsetWidth/2+'px';
aA[i-1].style.top=mcList[i-1].cy+oDiv.offsetHeight/2-mcList[i-1].offsetHeight/2+'px';
}
}
function doPosition()
{
var l=oDiv.offsetWidth/2;
var t=oDiv.offsetHeight/2;
for(var i=0;i<mcList.length;i++)
{
aA[i].style.left=mcList[i].cx+l-mcList[i].offsetWidth/2+'px';
aA[i].style.top=mcList[i].cy+t-mcList[i].offsetHeight/2+'px';

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

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