这里有新鲜出炉的 Javascript 教程,程序狗速度看过来!
Javascript 是一种由 Netscape 的 LiveScript 发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言,主要目的是为了解决服务器端语言,比如 Perl,遗留的速度问题,为客户提供更流畅的浏览效果。
这篇文章主要介绍了 JS 关键字球状旋转效果的实例代码。需要的朋友可以过来参考下,希望对大家有所帮助
有时上网查资料,看到别人的博客上有关键字旋转的效果,觉得蛮不错的。于是网上搜索了一下它的实现,好吧,自己动手写写。
html:
- <!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=gb2312" />
- <title>
- </title>
- <link rel="stylesheet" href="CSS/style.css" />
- <script type="text/javascript" src="js/lrtk.js">
- </script>
- </head>
- <body>
- <!-- 代码开始 -->
- <div id="div1">
- <a>
- Asp.net webform
- </a>
- <a>
- Asp.net mvc
- </a>
- <a>
- EF
- </a>
- <a>
- Castle
- </a>
- <a>
- Spring.net
- </a>
- <a>
- NHibernate
- </a>
- <a>
- WCF
- </a>
- <a>
- WPF
- </a>
- <a>
- AOP
- </a>
- <a>
- IoC
- </a>
- <a>
- SQL
- </a>
- <a>
- Javascript
- </a>
- <a>
- Jquery
- </a>
- <a>
- KendoUI
- </a>
- </div>
- </body>
- </html>
CSS:
- #div1 {
- height: 400px;
- width: 450px;
- position: relative;
- margin: 10px auto;
- } #div1 a {
- position: absolute;
- top: 0px;
- left: 0px;
- font - weight: bold;
- padding: 3px 6px;
- color: black;
- text - decoration: none;
- } #div1 a: hover {
- border: 1px solid#eee;
- background: #ccc;
- border - radius: 5px;
- }
既然是关键字,我觉得给他们加上不同的颜色才够酷。初始化一个数组存放颜色值,然后再随机分配给各个标签。
- var colors = ["#FF60AF","#9F35FF","#FF2D2D","#6C6C6C","#003D79","#00AEAE","#019858"];
- var rand = Math.ceil(Math.random()*6);
- aA[i].style.color=colors[rand];
JS:
- var radius = 100;
- var dtr = Math.PI/180;
- var d=300;
var mcList = [];var active = false;var lasta = 1;var lastb = 1;var distr = true;var tspeed=2;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 { var colors = ["#FF60AF","#9F35FF","#FF2D2D","#6C6C6C","#003D79","#00AEAE","#019858"]; var rand = Math.ceil(Math.random()*6); aA[i].style.color=colors[rand]; 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, 10);};
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 { 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 { aTmp.push(aA[i]); } aTmp.sort (function (vItem1, vItem2) {if(vItem1.cz>vItem2.cz) {return -1;} else if(vItem1.cz { return 1;} else {return 0;} } ); for(i=0;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 { aTmp.push(aA[i]); } aTmp.sort (function () {return Math.random()<0.5?1:-1;} ); for(i=0;i { oFragment.appendChild(aTmp[i]); } oDiv.appendChild(oFragment); for(var i=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 { 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);}
来源: http://www.phperz.com/article/17/0626/278114.html