game of life

'game of life'
todo: behavior near bitmap edge

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license : All rights reserved
modified : 2009-01-08 07:47:49

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/*
 'game of life'
todo: behavior near bitmap edge
*/
package {
 import flash.display.*;
 import flash.geom.*;
 import flash.filters.*;
 import flash.events.*;
 import flash.utils.Timer;

[SWF(width="400", height="400", backgroundColor="0xffffff", frameRate="15")]

/**
 * @author Matuesz Malczak (http://segfaultlabs.com)
 */
 public class Main extends MovieClip {                
    private var bd:BitmapData = new BitmapData( 200, 200, false );
    private var bd2:BitmapData = new BitmapData( bd.width, bd.height, bd.transparent );
    private var bd3:BitmapData = new BitmapData( bd.width, bd.height, bd.transparent );
    private var wr:Rectangle = new Rectangle(0,0,bd.width,bd.height );
    private var zp:Point = new Point(0,0);
    private var lock:Boolean = false;
    private var fil:ConvolutionFilter = new ConvolutionFilter(3,3,[ 1,1,1,
                                                            1,0.1,1,
        						    1,1,1 ], 1, 0 )

public function Main()
    {
      var bgl:Bitmap = new Bitmap(bd3);
      bgl.x = bgl.y = 0
      bgl.scaleX = 400 /bgl.width;
      bgl.scaleY = 400 /bgl.height;
      addChild(bgl);

bd3.fillRect( new Rectangle(0,0,bd.width,bd.height), 0x100000 );  
	/* game of life oscillator called 'crocodile' :) */
	bd3.setPixel( 13,11, 0x00ff00 );
	bd3.setPixel( 14,11, 0x00ff00 );
	bd3.setPixel( 15,11, 0x00ff00 );
	bd3.setPixel( 13,12, 0x00ff00 );
	bd3.setPixel( 15,12, 0x00ff00 );
	bd3.setPixel( 13,13, 0x00ff00 );
	bd3.setPixel( 14,13, 0x00ff00 );
	bd3.setPixel( 15,13, 0x00ff00 );
	
	bd3.setPixel( 13,14, 0x00ff00 );
	bd3.setPixel( 14,14, 0x00ff00 );
	bd3.setPixel( 15,14, 0x00ff00 );
	bd3.setPixel( 13,15, 0x00ff00 );
	bd3.setPixel( 14,15, 0x00ff00 );
	bd3.setPixel( 15,15, 0x00ff00 );
	
	bd3.setPixel( 13,16, 0x00ff00 );
	bd3.setPixel( 14,16, 0x00ff00 );
	bd3.setPixel( 15,16, 0x00ff00 );
	bd3.setPixel( 13,17, 0x00ff00 );
	bd3.setPixel( 15,17, 0x00ff00 );
	bd3.setPixel( 13,18, 0x00ff00 );
	bd3.setPixel( 14,18, 0x00ff00 );
	bd3.setPixel( 15,18, 0x00ff00 );
	/* random 40% */
	var xx:int, yy:int, i:int;
	for ( i=0; i < 0.4 * bd.width * bd.height; i+=1 )
	{
		xx = 20+Math.floor( (bd.width-20)*Math.random() )
		yy = 20+Math.floor( (bd.height-20)*Math.random() )		
		bd3.setPixel(xx,yy,0x00ff00);
	};

addEventListener( Event.ENTER_FRAME, updateGLdata );
      var t:Timer = new Timer(5000);
      t.addEventListener( TimerEvent.TIMER, addGlider );
      t.start();
    };

private function updateGLdata(evt:Event):void
    {
        if ( lock ) return;
     lock = true;
     bd.copyPixels( bd3, wr, zp );
     bd2.applyFilter( bd, wr, zp, fil );
     bd3.fillRect( wr, 0x100000 );
     /* game of life */
     bd3.threshold( bd2, wr, zp, "==", 0xff500000, 0xff00ff00, 0xffff0000, false );
     bd3.threshold( bd2, wr, zp, "==", 0xff510000, 0xff00ff00, 0xffff0000, false ); 
     bd3.threshold( bd2, wr, zp, "==", 0xff600000, 0xff00ff00, 0xffff0000, false );      
     lock = false;
    };
    
    /* single glider fired from bottom left corner */
    private function addGlider( evt:Event ):void
    {
        if ( lock ) return;
      lock = true; 
      var i:int = bd3.height-4;
      bd3.setPixel(1,i, 0x00ff00); bd3.setPixel(2,i, 0x00ff00); bd3.setPixel(3,i, 0x00ff00);
      bd3.setPixel(3,i+1, 0x00ff00    ); 
      bd3.setPixel(2,i+2, 0x00ff00);
      lock = false;
    };

}

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