<divid="div1">
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</div>
varradius = 120;
vardtr = Math.PI/180;
vard=300;
varmcList = [];
varactive =false;
varlasta = 1;
varlastb = 1;
vardistr =true;
vartspeed=10;
varsize=250;
varmouseX=0;
varmouseY=0;
varhowElliptical=1;
varaA=null;
varoDiv=null;
window.onload=function()
{
vari=0;
varoTag=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)
{
varoEvent=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);
};
functionupdate()
{
vara;
varb;
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;
}
varc=0;
sineCosine(a,b,c);
for(varj=0;j<mcList.length;j++)
{
varrx1=mcList[j].cx;
varry1=mcList[j].cy*ca+mcList[j].cz*(-sa);
varrz1=mcList[j].cy*sa+mcList[j].cz*ca;
varrx2=rx1*cb+rz1*sb;
varry2=ry1;
varrz2=rx1*(-sb)+rz1*cb;
varrx3=rx2*cc+ry2*(-sc);
varry3=rx2*sc+ry2*cc;
varrz3=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();
}
functiondepthSort()
{
vari=0;
varaTmp=[];
for(i=0;i<aA.length;i++)
{
aTmp.push(aA[i]);
}
aTmp.sort
(
function(vItem1, vItem2)
{
if(vItem1.cz>vItem2.cz)
{
return-1;
}
elseif(vItem1.cz<vItem2.cz)
{
return1;
}
else
{
return0;
}
}
);
for(i=0;i<aTmp.length;i++)
{
aTmp[i].style.zIndex=i;
}
}
functionpositionAll()
{
varphi=0;
vartheta=0;
varmax=mcList.length;
vari=0;
varaTmp=[];
varoFragment=document.createDocumentFragment();
//随机排序
for(i=0;i<aA.length;i++)
{
aTmp.push(aA[i]);
}
aTmp.sort
(
function()
{
returnMath.random()<0.5?1:-1;
}
);
for(i=0;i<aTmp.length;i++)
{
oFragment.appendChild(aTmp[i]);
}
oDiv.appendChild(oFragment);
for(vari=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';
}
}
functiondoPosition()
{
varl=oDiv.offsetWidth/2;
vart=oDiv.offsetHeight/2;
for(vari=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;
}
}
functionsineCosine( 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);
}