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js实现动态球形标签云

时间:2017-12-17 15:57:45      阅读:444      评论:0      收藏:0      [点我收藏+]

标签:element   osi   实现   ecos   pos   性感   logs   tran   jquer   

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原文演示地址:http://www.17sucai.com/pins/demoshow/8108

技术分享图片
<!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>
View Code
技术分享图片
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);
}
script.js

js实现动态球形标签云

标签:element   osi   实现   ecos   pos   性感   logs   tran   jquer   

原文地址:http://www.cnblogs.com/0bug/p/8052062.html

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