Inseguimento del Mouse 2
Di Trantor

<HTML> <HEAD> <TITLE>Inseguimento del Mouse 2</TITLE> <link rel="stylesheet" href="../stili.css" type="text/css"> <style type="text/css"><!-- #dot0 {position:absolute} #dot1 {position:absolute} #dot2 {position:absolute} #dot3 {position:absolute} #dot4 {position:absolute} #dot5 {position:absolute} #dot6 {position:absolute} #dot7 {position:absolute} #dot8 {position:absolute} // --> </style> <script type="text/javascript"><!-- var nDots = 9; var Xpos = 0; var Ypos = 0; var DELTAT = .02; var SEGLEN = 10; var SPRINGK = 10; var MASS = 1; var GRAVITY = 10; var RESISTANCE = 10; var STOPVEL = 0.5; var STOPACC = 0.5; var DOTSIZE = 11; var BOUNCE = 0.75; var isNetscape = navigator.appName=="Netscape"; var followmouse = true; var dots = new Array(); function init() { for (var 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; } if (isNetscape) { startanimate(); } else { setTimeout("startanimate()", 100); } } function dot(i) { this.X = Xpos; this.Y = Ypos; this.dx = 0; this.dy = 0; if (isNetscape) { this.obj = eval("document.dot" + i); } else { this.obj = eval("dot" + i + ".style"); } } function startanimate() {setInterval("animate()", 20)} function MoveHandler(e) { Xpos = e.pageX; Ypos = e.pageY; return true; } function MoveHandlerIE() { Xpos = window.event.x + document.body.scrollLeft; Ypos = window.event.y + document.body.scrollTop; } 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 + document.scrollTop; width = window.innerWidth + document.scrollLeft; } else { height = document.body.clientHeight + document.body.scrollTop-5; width = document.body.clientWidth + document.body.scrollLeft-5; } if (dots[i].Y >= height - DOTSIZE - 1) { if (dots[i].dy > 0) {dots[i].dy = BOUNCE * -dots[i].dy} dots[i].Y = height - DOTSIZE - 1; } if (dots[i].X >= width - DOTSIZE) { if (dots[i].dx > 0) {dots[i].dx = BOUNCE * -dots[i].dx} dots[i].X = width - DOTSIZE - 1; } 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 = dots[i].X; dots[i].obj.top = dots[i].Y; } } if (isNetscape) { document.captureEvents(Event.MOUSEMOVE); document.onMouseMove = MoveHandler; } else { document.onmousemove = MoveHandlerIE; } // --> </script> </head> <BODY> <div id="titolo">Inseguimento del Mouse 2</div> <DIV id=dot0></DIV> <DIV id=dot1><IMG src="sfera.gif"></DIV> <DIV id=dot2><IMG src="sfera.gif"></DIV> <DIV id=dot3><IMG src="sfera.gif"></DIV> <DIV id=dot4><IMG src="sfera.gif"></DIV> <DIV id=dot5><IMG src="sfera.gif"></DIV> <DIV id=dot6><IMG src="sfera.gif"></DIV> <DIV id=dot7><IMG src="sfera.gif"></DIV> <DIV id=dot8><IMG src="sfera.gif"></DIV> <script type="text/javascript">init()</SCRIPT> <hr> <!-- DIV 728x90 IAM --> <div id="ad72890bottom" align="center"></div> <!-- START Digilander F --> <SCRIPT LANGUAGE="Javascript"> <!-- if ( typeof(bsl1_boot) != 'undefined' ) { setTimeout("bsl1_boot()",100); } var rs_DLR=1; var rs_DLRERR=0; //--> </SCRIPT> <SCRIPT LANGUAGE="Javascript" SRC="http://digilander.libero.it/_ad/digi_ad_13.js"> </SCRIPT> <!-- Begin Nielsen DCR SDK --> <script> if(window.location === window.parent.location){ // Static Queue Snippet ! function(t, n) { t[n] = t[n] || { nlsQ: function(e, o, c, r, s, i) { return s = t.document, r = s.createElement("script"), r.async = 1, r.src = ("http:" === t.location.protocol ? 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