首页
微信
安卓
接口
移动
前端
专题
文档库
工具
网址
§
ITPOW
>>
文档
>>
JavaScript
>>
鼠标键盘
有“弹性”的鼠标跟随
作者: 来源: 日期:2004-10-8
<SCRIPT language=JavaScript1.2> <!-- //-- GRANTEE ---------------------------------BiuBiu //-- 来自http://www.trueme.net/self/bb_rjtm.asp?welcome var nDots = 3; var Xpos = -86; var Ypos = 600; var DELTAT = .01; var SEGLEN = 10; var SPRINGK = 10; var MASS = 1; var GRAVITY = 50; var RESISTANCE = 10; var STOPVEL = 0.1; var STOPACC = 0.1; var DOTSIZE = 10; var BOUNCE = 0.75; var isNetscape = navigator.appName=="Netscape"; var followmouse = true; function BiuBiuNowDo() { var i = 0; dots = new Array(); for (i = 0; i <nDots; i++) { dots[i] = new dot(i); } for (i = 0; i <nDots; i++) { dots[i].obj.left = dots[i].X; dots[i].obj.top = dots[i].Y; } setTimeout("startanimate()", 2000); } function dot(i) { this.X = Xpos; this.Y = Ypos; this.dx = 0; this.dy = 0; if (isNetscape) { this.obj = eval("document.dot" + i); if(i>0) this.obj.visibility="show"; } else { this.obj = eval("dot" + i + ".style"); if(i>0) this.obj.visibility="visible"; } } function startanimate() { setInterval("animate()", 20); } function MoveHandler(e) { Xpos = e.pageX; Ypos = e.pageY; return true; } function MoveHandlerIE() { Xpos = window.event.x; Ypos = window.event.y; } if (isNetscape) { document.captureEvents(Event.MOUSEMOVE); document.onMouseMove = MoveHandler; } else { document.onmousemove = MoveHandlerIE; } function vec(X, Y) { this.X = X; this.Y = Y; } function springForce(i, j, spring) { var dx = (dots[i].X - dots[j].X); var dy = (dots[i].Y - dots[j].Y); var len = Math.sqrt(dx*dx + dy*dy); if (len > SEGLEN) { var springF = SPRINGK * (len - SEGLEN); spring.X += (dx / len) * springF; spring.Y += (dy / len) * springF; } } function animate() { var start = 0; if (followmouse) { dots[0].X = Xpos; dots[0].Y = Ypos; start = 1; } for (i = start ; i <nDots; i++ ) { var spring = new vec(0, 0); if (i > 0) { springForce(i-1, i, spring); } if (i <(nDots - 1)) { springForce(i+1, i, spring); } var resist = new vec(-dots[i].dx * RESISTANCE, -dots[i].dy * RESISTANCE); var accel = new vec((spring.X + resist.X)/ MASS, (spring.Y + resist.Y)/ MASS + GRAVITY); dots[i].dx += (DELTAT * accel.X); dots[i].dy += (DELTAT * accel.Y); if (Math.abs(dots[i].dx) <STOPVEL && Math.abs(dots[i].dy) <STOPVEL && Math.abs(accel.X) <STOPACC && Math.abs(accel.Y) <STOPACC) { dots[i].dx = 0; dots[i].dy = 0; } dots[i].X += dots[i].dx; dots[i].Y += dots[i].dy; var height, width; if (isNetscape) { height = window.innerHeight; width = window.innerWidth; } else { height = document.body.clientHeight; width = document.body.clientWidth; } if (dots[i].X <0) { if (dots[i].dx <0) { dots[i].dx = BOUNCE * -dots[i].dx; } dots[i].X = 0; } dots[i].obj.left =document.body.scrollLeft + dots[i].X; dots[i].obj.top =document.body.scrollTop + dots[i].Y; } } function writeBoules() { setTimeout("initBoules()",1000); } //--> </SCRIPT> <body onload="BiuBiuNowDo();"> <DIV id=dot0 style="HEIGHT: 19px; LEFT: 5px; POSITION: absolute; TOP: 661px; VISIBILITY: hidden; WIDTH: 200px"></DIV> <DIV id=dot1 style="POSITION: absolute; VISIBILITY: hidden"> <DD><br><IMG border=0 src="/upload/127/biubiu1.gif"></DD></DIV> <DIV id=dot2 style="POSITION: absolute; VISIBILITY: hidden"> <DD><IMG border=0 src="/upload/127/biubiu2.gif"></DD></DIV>
[Ctrl+A 全部选择 提示:你可先修改部分代码,再按运行]
相关文章
创建于2005年
渝ICP备05010272号-1
电邮:
cftea@126.com
即将跳转...