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超炫酷3D云标签JS特效

精选代码 Tomy 242次浏览 已收录 0个评论 扫描二维码
<!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <title>分享一款超酷的3D云标签JS特效</title>
    <style type="text/css">
        body { background: #24313d; }
        #tagsList { position: relative; width: 450px; height: 450px; margin: 150px auto 0; }
        #tagsList a { position: absolute; top: 0px; left: 0px; font-family: Microsoft YaHei; color: #fff; font-weight: bold; text-decoration: none; padding: 3px 6px; }
        #tagsList a:hover { color: #FF0000; letter-spacing: 2px; }
    </style>
    <script>
        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('tagsList');
            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>
</head>
<body>
<div id="tagsList">
    <a href="#/Article.aspx?kid=1" title="星级评分">星级评分</a>
    <a href="#/Article.aspx?kid=2" title="层特效">层特效</a>
    <a href="#/Article.aspx?kid=3" title="关键字">关键字</a>
    <a href="#/Article.aspx?kid=4" title="拖拽">拖拽</a>
    <a href="#/Article.aspx?kid=5" title="分页插件">分页插件</a>
    <a href="#/Article.aspx?kid=6" title="时间插件">时间插件</a>
    <a href="#/Article.aspx?kid=7" title="弹出层">弹出层</a>
    <a href="#/Article.aspx?kid=8" title="数据统计">数据统计</a>
    <a href="#/Article.aspx?kid=9" title="HTML5">HTML5</a>
    <a href="#/Article.aspx?kid=10" title="置顶特效">置顶特效</a>
    <a href="#/Article.aspx?kid=11" title="选项卡">选项卡</a>
    <a href="#/Article.aspx?kid=12" title="导航菜单">导航菜单</a>
    <a href="#/Article.aspx?kid=13" title="原创">原创</a>
    <a href="#/Article.aspx?kid=14" title="动画插件">动画插件</a>
    <a href="#/Article.aspx?kid=15" title="实用特效">实用特效</a>
    <a href="#/Article.aspx?kid=16" title="table插件">table插件</a>
    <a href="#/Article.aspx?kid=17" title="文字特效">文字特效</a>
    <a href="#/Article.aspx?kid=18" title="图片特效">图片特效</a>
    <a href="#/Article.aspx?kid=19" title="在线客服">在线客服</a>
    <a href="#/Article.aspx?kid=20" title="瀑布流">瀑布流</a>
    <a href="#/Article.aspx?kid=21" title="网友蘑菇">网友蘑菇</a>
</div>
</body>
</html>

代码演示
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