1 package cn.d   2 {
     3     import flash.display.Sprite;   4     import flash.display.StageAlign;   5     import flash.display.StageScaleMode;   6     import flash.events.Event;   7   8     [SWF(height="800", width="1200")]   9     public class ClassName extends Sprite  10     {
    11         private var pars:Array=[];  12         private var numPar:int=200;  13  14         public function ClassName()  15         {
    16              17             stage.scaleMode=StageScaleMode.NO_SCALE;  18             stage.align=StageAlign.TOP_LEFT;  19              20             init();  21         }  22  23         private function init():void  24         {
    25             for (var i:int=0; i < numPar; i++)  26             {
    27                 var size:Number = Math.random() * 10 + 2;  28                 var par:Ball=new Ball(5);  29                 par.x=Math.random() * 1024;  30                 par.y=Math.random() * 900;  31                 par.mass=size;  32                 par.vx=Math.random()*6-3;  33                 par.vy=Math.random()*6-3;  34                  35                 this.addChild(par);  36                 pars.push(par);  37             }  38  39             this.addEventListener(Event.ENTER_FRAME, onEnterFrame);  40         }  41  42  43         private function onEnterFrame(e:Event):void  44         {
    45             graphics.clear();  46             var i:int=0;  47             for (i=0; i < numPar; i++)  48             {
    49                 var par:Ball=pars[i];  50                 par.x+=par.vx;  51                 par.y+=par.vy;  52                  53                  54                 if(par.x>=stage.stageWidth)  55                 {
    56                     par.x=0;  57                 }  58                 else if(par.x<=0)  59                 {
    60                     par.x=stage.stageWidth;  61                 }  62                  63                 if(par.y>=stage.stageHeight)  64                 {
    65                     par.y=0;  66                 }  67                 else if(par.y<=0)  68                 {
    69                     par.y=stage.stageHeight;  70                 }  71             }  72  73             for (i=0; i < numPar - 1; i++)  74             {
    75                 var parA:Ball=pars[i];  76                 for(var j:int=i+1;j