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原文演示地址：http://www.17sucai.com/pins/demoshow/8108
<!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=utf-8" /><title>js标签云</title><style type="text/css">#tagbox{position:relative;margin:20px auto 0px;width:300px;height:250px;background:#3a4954;}#tagbox a{position:absolute;padding:3px 6px;font-family:Microsoft YaHei;color:#fff;TOP:0px;font-weight:bold;text-decoration:none;left:0px}#tagbox a:hover{border:#eee 1px solid;background:#000;}#tagbox .blue{color:blue}#tagbox .red{color:red}#tagbox .yellow{color:yellow}</style></head><body><script type="text/javascript" src="js/script.js"></script><div id="tagbox">http://www.cnblogs.com/0bug/tag/css/http://www.cnblogs.com/0bug/tag/python/http://www.cnblogs.com/0bug/tag/html/http://www.cnblogs.com/0bug/tag/JavaScript/http://www.cnblogs.com/0bug/tag/else/http://www.cnblogs.com/0bug/tag/jQuery/http://www.cnblogs.com/0bug/tag/Other/http://www.cnblogs.com/0bug/tag/Bootstrapt/http://www.cnblogs.com/0bug/tag/MySQL/http://www.cnblogs.com/0bug/tag/HTTP/http://www.cnblogs.com/0bug/tag/Markdown/http://www.cnblogs.com/0bug/tag/git/http://www.cnblogs.com/0bug/tag/ProcessOn/http://www.cnblogs.com/0bug/tag/pymysql/http://www.cnblogs.com/0bug/tag/计算机基础/http://www.cnblogs.com/0bug/tag/随笔/http://www.cnblogs.com/0bug/tag/IDE/ ???<a href="#">美女</a> ????<a class="red" href="#">写真</a> ????<a href="#">贴图</a> ????<a href="#">灌水</a> ????<a class="blue" href="#">大片</a> ????<a href="#">小说</a> ????<a class="red" href="#">欧美</a> ????<a class="yellow" href="#">日韩</a> ????<a href="#">诱人</a> ????<a class="red" href="#">搞笑</a> ????<a href="#">性感</a> ????<a class="blue" href="#">壁纸</a> ????<a class="blue" href="#">泳装</a> ???<a class="red" href="#">言情</a> ????<a class="yellow" href="#">浪漫</a> ???<a class="yellow" href="#">耽美</a> ????<a class="blue" href="#">爆笑</a> ???<a class="yellow" href="#">美眉</a> ???<a class="blue" href="#">同人</a> ????<a class="blue" href="#">武侠</a> ????<a class="red" href="#">魔幻</a> ????<a href="#">教案</a> ????<a href="#">论文</a> ????<a class="yellow" href="#">妩媚</a> ????<a href="#">黑丝</a> ????<a href="#">诱惑</a> ????<a class="blue" href="#">科幻</a> ????<a class="red" href="#">恐怖</a> ????<a class="red" href="#">性感</a> ????<a class="blue" href="#">TXT下载</a> ????<a href="#">音乐</a> ????<a class="blue" href="#">游戏</a> ????<a class="blue" href="#">CG资源</a> ????<a href="#">YunFile</a> ????<a href="#">课件</a> ????<a href="#">幽默</a> ????<a ref="#">波霸</a> ????<a href="#">私人照</a> ????<a href="#">名校</a> ????<a class="red" href="#">赚钱</a> ????<a class="yellow" href="#">千脑</a> ????<a class="yellow" href="#">清純</a> ????<a class="yellow" href="#">云电脑</a> </div></body></html>var radius = 100;var dtr = Math.PI/180;var d=200;var mcList = [];var active = false;var lasta = 1;var lastb = 1;var distr = true;var tspeed=5;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(‘tagbox‘); ???????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?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);}js实现动态球形标签云
原文地址：http://www.cnblogs.com/0bug/p/8052062.html