flash on 2013-1-23

/**
 * Copyright mutantleg ( http://wonderfl.net/user/mutantleg )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/8ZqB
 */

package {
    import flash.text.TextField;
    import flash.events.Event;
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        
        public var psys:wPartSys;
        
        public static var deb:TextField;
        
        public function FlashTest() {
            
            deb = new TextField();
            addChild(deb);
            
            //deb.text = " debug ";
            
            psys = new wPartSys();
            
           // deb.text =" reach2";
            
            psys.initPart(64);
            
          //  deb.text = " reach1 ";
            
            stage.addEventListener(Event.ENTER_FRAME, onEnter);    
        }//ctor
        
        public var delw:int = 0; 
        
        public function onEnter(e:Event):void
        {
            //deb.text = " reach";
            delw += 1;
            if (delw >= 3)
            {
             psys.addPart(Math.random()*200+100, Math.random()*200+100, 0 );
             delw = 0;
            }//endif
            
            psys.update();
            psys.render();
            
            graphics.clear();
            graphics.lineStyle(1,0);
            
            var vf:Vector.<uint>;
            var vv:Vector.<Number>;
            
            var vec:Vector.<wPart>;
            var i:int;
            var num:int;
            var a:wPart;
            
            vec = psys.vecPart;
            num = vec.length;
            
            /*
            for (i = 0; i < num; i++)
            {
                a = vec[i];
                if (a.hp <= 0) { continue; }
                
                graphics.drawCircle(a.cx,a.cy, 4);
                
            }//nexti
            */
            
            var f:int;
            var f2:int;
            var f3:int;
            
            vf = psys.vecFace;
            vv = psys.vecVert;
            num = vf.length;
            
            for (i = 0; i < num; i+=3)
            {
                f = vf[i] * 3;
                f2 = vf[i+1] * 3;
                f3 = vf[i+2] * 3;
                
                graphics.moveTo(vv[f],vv[f+1]);
                graphics.lineTo(vv[f2],vv[f2+1]);
                graphics.lineTo(vv[f3],vv[f3+1]);
                graphics.lineTo(vv[f], vv[f+1]);
                
                
            }//nexti
            
            //deb.text = " " + num;
            
        }//onenter
        
    }//flashtest
}

internal class wPartSys
{
    public var vecPart:Vector.<wPart>;
    public var vecVert:Vector.<Number>;
    public var vecFace:Vector.<uint>;
    public var it:int = 0;
    public var numPart:int = 0;
    
    public function wPartSys()
    {
        
    }//ctor
    
    public function initPart(num:int):void
    {
        var k:int;
        var i:int;
        var numFace:int;
        
        if (num < 16) { num = 16;}
        if (num > 256) { num=256; }
        
        numPart = num;
        
       // FlashTest.deb.text = " reach2b";
        
        vecPart = new Vector.<wPart>(num,false);
        vecVert = new Vector.<Number>(num*3*4,false);
        vecFace = new Vector.<uint>(num*3*2,false);
        
        for (i = 0; i < num; i++)
        {
            vecPart[i] = new wPart();
        }//nexti
        
       // FlashTest.deb.text = " reach3";
      
        numFace = num*3*2;
        k = 0;
        
        for (i = 0; i < numFace; i +=6 )
        {
            vecFace[i] = 0+k;
            vecFace[i+1] = 1+k;
            vecFace[i+2] = 2+k;
            
            vecFace[i+3] = 1+k;
            vecFace[i+4] = 3+k;
            vecFace[i+5] = 2+k;

            k += 4;
        }//nexti
         
    }//initpart
    
    public function addPart(x:Number, y:Number, z:Number):void
    {
      var a:wPart;
      
      a = vecPart[it];

      a.hp = 90;
      a.cx = x;
      a.cy = y;
      a.cz = z;

      a.vx = Math.random() - Math.random();      
      a.vy = Math.random() - Math.random();      
      a.vz = Math.random() - Math.random();      
        
      it += 1;
      if (it >= numPart) { it = 0; }  
        
    }//addpart
    
    public function update():void
    {
      var a:wPart;
      var i:int;
      var num:int;
      
      num = vecPart.length;
      
      for (i =0; i < num; i+=1)
      {
          a = vecPart[i];
          if (a.hp <= 0) { continue; }

          a.hp -= 1;
          
          a.vy += 0.05;

          a.cx += a.vx;
          a.cy += a.vy;
          a.cz += a.vz;          
          
      }//nexti
        
    }//update
    
    
    public function render():void
    {
        var a:wPart;
        var i:int;
        var num:int;
        var k:int;
        var n:int;
        
        k = 0;
        num = vecPart.length;
        
        for (i = 0; i < num; i++)
        {
            a = vecPart[i];
            if (a.hp <= 0) { continue;}
            
            n = k * 12;
            
            vecVert[n] = a.cx - a.size;
            vecVert[n+1] = a.cy - a.size;
            vecVert[n+2] = a.cz;
            
            vecVert[n+3] = a.cx + a.size;
            vecVert[n+4] = a.cy - a.size;
            vecVert[n+5] = a.cz;

            vecVert[n+6] = a.cx - a.size;
            vecVert[n+7] = a.cy + a.size;
            vecVert[n+8] = a.cz;

            vecVert[n+9] = a.cx + a.size;
            vecVert[n+10] = a.cy + a.size;
            vecVert[n+11] = a.cz;
            
            
            k += 1;
        }//nexti
    }//render
    
}//wpartsys

internal class wPart
{
    public var size:Number = 4;
    public var cx:Number = 0;
    public var cy:Number = 0;
    public var cz:Number = 0;
    public var vx:Number = 0;
    public var vy:Number = 0;
    public var vz:Number = 0;
    public var hp:Number = 0;
    
    
    
}//classend