标签：upper func 效果 his math color resize over 技术
代码：
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>JS文字球状放大效果DEMO演示</title> <style type="text/css"> body {cursor:crosshair;margin:0; padding:0; position:absolute; overflow:hidden; background:#000; left:0; top:0; width:100%; height:100%;} span {position:absolute;font-family: verdana; font-weight: bold;} </style> <script type="text/javascript"><!-- T = "WKTSB "; I = 0; o = new Array(); xm = -1000; ym = -1000; /////////////// rad = 100; dim = 600; /////////////// W = 0; H = 0; NX = 14; NY = 14; var nx; var ny; document.onmousemove = function(e){ if (window.event) e = window.event; xm = (e.x || e.clientX) - (nx * .5) + dim * .5; ym = (e.y || e.clientY) - (ny * .5) + dim * .5; } function resize() { nx = document.body.offsetWidth; ny = document.body.offsetHeight; } onresize = resize; function CObj(N,i,j,c){ this.obj = document.createElement("span"); this.obj.innerHTML = c; DOOT.appendChild(this.obj); this.N = N; this.To = 16; this.x0 = i*2*W; this.y0 = j*2*H; this.anim = true; this.mainloop = function(){ with (this) { dx = xm - x0; dy = ym - y0; dist = Math.sqrt(dx * dx + dy * dy); if (dist < rad) { anim = true; M = Math.cos(.5 * Math.PI * Math.abs(dist / rad)); c = Math.round(84 + M * 171); with(obj.style){ left = x0 - dx * M; top = y0 - dy * M; zIndex = Math.round(100 + M); fontSize = 8 + M * W * 2; color = "RGB("+c+","+c+","+c+")"; } } else { if(anim){ with(obj.style){ left = x0; top = y0; zIndex = 0; fontSize = 8; color = "RGB(88,88,88)"; } anim = false; } } } } } function run(){ for(i in o)o[i].mainloop(); setTimeout(run,16); } onload = function (){ DOOT = document.getElementById("doot"); with(DOOT.style){ left = -dim/2; top = -dim/2; width = dim; height = dim; } resize(); W = (dim / NX) / 2; H = (dim / NY) / 2; K = 0; for(var j=0;j<NY;j++){ for(var i=0;i<NX;i++){ c=T.charAt((I++)%T.length).toUpperCase(); if(c==" ")c="·"; o[K] = new CObj(K++,i,j,c); } } run(); } //--> </script> </head> <body> <span style="position:absolute;left:50%;top:50%"> <span id="doot"></span> </span> <div style="text-align:center;clear:both;"> <script src="/gg_bd_ad_720x90.js" type="text/javascript"></script> <script src="/follow.js" type="text/javascript"></script> </div> </body> </html>
截图：
标签：upper func 效果 his math color resize over 技术
原文地址：http://www.cnblogs.com/frankzone/p/7789114.html
