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  <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <title>particle-4</title> <meta http-equiv="imagetoolbar" content="no"> <style type="text/css"> html { overflow: hidden; } body { margin: 0px; padding: 0px; background: #ccc; position: absolute; width: 100%; height: 100%; cursor: crosshair; } #SF { position: absolute; left: 15%; top: 15%; width: 70%; height: 70%; overflow: hidden; background: #fff; } #SF img { cursor: pointer; position: absolute; } #FPS { position: absolute; right: 5px; bottom: 5px; font-size: 10px; color: #666; font-family: courier; } </style> <script type="text/javascript"> // //////////////////////// var D = 150; var NB = 15; //////////////////////// var o = []; var xm = 0; var ym = 0; var R = 1 / (D * D); var fps = 0; var M = 0; document.onmousemove = function(e){ if(window.event) e=window.event; tg = (e.target) ? e.target : e.srcElement; if(tg.obj){ xm = tg.obj.x; ym = tg.obj.y; M = 10; } else M = 0; } function resize() { nx = document.getElementById("SF").offsetWidth; ny = document.getElementById("SF").offsetHeight; } onresize = resize; obZ = function() { this.x = Math.random() * nx; this.y = Math.random() * ny; this.vx = 0; this.vy = 0; this.O = new RotImg(this, document.getElementById("SF"), [ ["p1", 0,0], ["p2", 8,-30], ["p2", 8,30], ["p5", 20,180] ]); } function RotImg(parent, obj, param){ this.param = param; for(var i in param){ s = param[i]; m = document.createElement("img"); m.src = document.getElementById(s[0]).src; m.obj = parent; obj.appendChild(m); param[i][0] = m; param[i][3] = m.width * .5; param[i][4] = m.height * .5; param[i][2] *= Math.PI/180; } this.position = function (x,y, angle){ with (this) { for(var i in param){ a = ( angle + param[i][2]); r = param[i][1]; with(param[i][0].style){ left = Math.round(-param[i][3] + x + Math.cos(a) * r) + 'px'; top = Math.round(-param[i][4] + y + Math.sin(a) * r) + 'px'; } } } } } function mainloop(){ M--; fps++; for(var i=0; i<NB; i++){ with(o[i]){ for(var j=0; j<NB; j++){ B = o[j]; if(i != j){ dx = x - B.x; dy = y - B.y; d = (dx * dx + dy * dy); if(d < 2 * D * D){ w = Math.exp(-(dx * dx * R)) * Math.exp(-(dy * dy * R)); // cohesion vx -= 1.8 * w * dx; vy -= 1.8 * w * dy; // avoidance if(B.x<x) vx += 100 * w; else vx -= 100 * w; if(B.y<y) vy += 100 * w; else vy -= 100 * w; // alignment b = w * B.vx; if(Math.abs(b)>10)b = (b / Math.abs(b)) * 10; vx += b; b = w * B.vy; if(Math.abs(b)>10)b = (b / Math.abs(b)) * 10; vy += b; } } } if(M > 0){ dx = x - xm; dy = y - ym; w = Math.exp(-(dx * dx * R)) * Math.exp(-(dy * dy * R)); if(xm < x) ex = w; else ex = -w; if(ym < y) ey = w; else ey = -w; vx += 100 * NB * ex; vy += 100 * NB * ey; } vx *= .98; vy *= .98; x += vx / (NB * 100); y += vy / (NB * 100); if(x > nx + 10) x = -10; else if(x < -10) x = nx + 10; if(y > ny + 10) y = -10; else if(y < -10) y = ny + 10; O.position(x, y, Math.atan2(vy, vx)); } } setTimeout("mainloop();", 1); } onload = function(){ resize(); xm = 10000; ym = 10000; for(var i=0; i<NB; i++)o[i] = new obZ() mainloop(); setInterval("document.getElementById('FPS').innerHTML=fps+' fps';fps=0", 1000); } </script> </head> <body> <div class="wmvwfqqt" id="SF"></div> <div style="visibility: hidden"> <img id="p1" src="http://www.lanrentuku.com/down/js/images/12476486070.gif"> <img id="p2" src="http://www.lanrentuku.com/down/js/images/12476486071.gif"> <img id="p5" src="http://www.lanrentuku.com/down/js/images/12476486072.gif"> </div> <div class="wmvwfqqt" id="FPS"></span> </body> </html>

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