跟随鼠标移动的流星

2024-09-05 12:22:23

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一款鼠标跟随特效，许多跟随鼠标移动的小星星组成一定的图案，十分漂亮，主要是运用JS技术实现的鼠标特效，DIV+CSS布局，符合WEB标准。

<!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><title>跟随鼠标移动的流星</title><meta http-equiv="content-type" content="text/html;charset=gb2312"><style type="text/css">html{	overflow:hidden;}body{	position:absolute;	height:100%;	width:100%;	margin:0;	padding:0;}#screen{	background:#000;	position:absolute;	width:100%;	height:100%;}#screen span{	background:#fff;	font-size:0;	overflow:hidden;	width:2px;	height:2px;}</style><script type="text/javascript"> var Follow = function () {	var $ = function (i) {return document.getElementById(i)},	addEvent = function (o, e, f) {o.addEventListener ? o.addEventListener(e, f, false) : o.attachEvent('on'+e, function(){f.call(o)})},	OBJ = [], sp, rs, N = 0, m;	var init = function (id, config) {		this.config = config || {};		this.obj = $(id);		sp = this.config.speed || 4;		rs = this.config.animR || 1;		m = {x: $(id).offsetWidth * .5, y: $(id).offsetHeight * .5};		this.setXY();		this.start();	}	init.prototype = {		setXY : function () {			var _this = this;			addEvent(this.obj, 'mousemove', function (e) {				e = e || window.event;				m.x = e.clientX;				m.y = e.clientY;			})		},		start : function () {			var k = 180 / Math.PI, OO, o, _this = this, fn = this.config.fn;			OBJ[N++] = OO = new CObj(null, 0, 0);			for(var i=0;i<360;i+=20){				var O = OO;				for(var j=10; j<35; j+=1){					var x = fn(i, j).x,					y = fn(i, j).y;					OBJ[N++] = o = new CObj(O , x, y);					O = o;				}			}			setInterval(function() {				for (var i = 0; i < N; i++) OBJ[i].run();			}, 16);		}	}	var CObj = function (p, cx, cy) {		var obj = document.createElement("span");		this.css = obj.style;		this.css.position = "absolute";		this.css.left = "-1000px";		this.css.zIndex = 1000 - N;		document.getElementById("screen").appendChild(obj);		this.ddx = 0;		this.ddy = 0;		this.PX = 0;		this.PY = 0;		this.x = 0;		this.y = 0;		this.x0 = 0;		this.y0 = 0;		this.cx = cx;		this.cy = cy;		this.parent = p;	}	CObj.prototype.run = function () {		if (!this.parent) {			this.x0 = m.x;			this.y0 = m.y;		} else {			this.x0 = this.parent.x;			this.y0 = this.parent.y;		}		this.x = this.PX += (this.ddx += ((this.x0 - this.PX - this.ddx) + this.cx) / rs) / sp;		this.y = this.PY += (this.ddy += ((this.y0 - this.PY - this.ddy) + this.cy) / rs) / sp;		this.css.left = Math.round(this.x) + 'px';		this.css.top = Math.round(this.y) + 'px';	}	return init;}();</script></head><body><div id="screen"></div><script type="text/javascript">new Follow('screen', {	speed: 4,	animR : 2,	fn : function (i, j) {		return {			x : j/4*Math.cos(i),			y : j/4*Math.sin(i)		}	}})</script></body></html>

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