// forked from bigfish's forked from: cellular automata #1 // forked from bigfish's cellular automata #1 package { import flash.display.Bitmap; import flash.display.BitmapData; import flash.geom.Rectangle; import flash.display.Sprite; import flash.events.Event; /** * if either neighbour is black --> make black * if both neighbours black --> white * else white */ public class CellularAutomata3 extends Sprite { private var bmd:BitmapData; private var canvas:Bitmap; private var rows:int = 400; private var cols:int = 400; private var left:int = cols + 1; private var right:int = cols - 1; private var rect:Rectangle = new Rectangle(0, 0, cols, rows); private var numPixels:int = rows*cols; private var pixelVector:Vector.<uint> = new Vector.<uint>(numPixels); public function CellularAutomata3() { init(); } /** * set up canvas */ private function init():void { bmd = new BitmapData(cols,rows,true,0xFFFFFFFF); //seed pixel bmd.setPixel(200,0,0xFF000000); canvas = new Bitmap(bmd); canvas.x = 20; canvas.y = 20; addChild(canvas); iterate(); //addEventListener(Event.ENTER_FRAME, iterate); } /** * apply rule to image (one iteration) */ //private function iterate(e:Event):void private function iterate():void { pixelVector = bmd.getVector(rect); for(var i:int = cols; i < numPixels; ++i) { //part 1 - if either neighbour is black --> black if(i%cols > 0 && ( pixelVector[i - left] == 0xFF000000 )){ pixelVector[i] = 0xFF000000; } else if(i%cols < right && pixelVector[i - right] == 0xFF000000) { pixelVector[i] = 0xFF000000; } else { pixelVector[i] = 0xFFFFFFFF; } //part two - if both neighbours are black --> make white if((i%cols > 0 && ( pixelVector[i - left] == 0xFF000000 )) && (i%cols < right && pixelVector[i - right] == 0xFF000000)) { pixelVector[i] = 0xFFFFFFFF; } } bmd.setVector(rect, pixelVector); } } }