DisplacementMapFilter

by cpu_t 17 Mar 2010

Embed

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

package {
	import flash.display.Bitmap;
	import flash.display.BitmapData;
	import flash.display.Loader;
    import flash.display.Sprite;
	import flash.events.Event;
	import flash.filters.DisplacementMapFilter;
	import flash.geom.Point;
	import flash.net.URLRequest;
	import flash.system.LoaderContext;
	import flash.text.StyleSheet;
	
	import net.hires.debug.Stats;
    public class FlashTest extends Sprite
	{
		private var mapFilter:DisplacementMapFilter;
		private var filterData:BitmapData;
		private var isLoadComp:Boolean = false;
		private var bmpdata:BitmapData;
		private var view:BitmapData;
		
        public function FlashTest()
		{
			stage.addChild(new Stats());
			
			var seed:int = int(Math.random() * 0xFFFFFF);
			var offsets:Array = new Array();
			offsets[0] = new Point(0, 0);
			offsets[1] = new Point(0, 0);
			filterData = new BitmapData(stage.stageWidth, stage.stageHeight);
			filterData.perlinNoise(stage.stageWidth / 2, stage.stageHeight / 2, 2, seed, false, false, 3, false, offsets);
			
			mapFilter = new DisplacementMapFilter(filterData, filterData.rect.topLeft, 1, 2);
			
			loadAndSet();
			addChild(new Bitmap(view));
			
			var count:Number = 0;
			addEventListener(Event.ENTER_FRAME, function(e:Event):void
			{
				if (!isLoadComp) return;
				view.applyFilter(bmpdata, bmpdata.rect, bmpdata.rect.topLeft, mapFilter);
				
				count++;
				offsets[1].x = (offsets[0].x += (Math.cos(count*Math.PI/180)-1) * 3) * .5;
				offsets[1].y = (offsets[0].y += (Math.cos(Math.PI+count*Math.PI/180)-1) * 3) * .5;
				filterData.perlinNoise(stage.stageWidth / 2, stage.stageHeight / 2, 2, seed, false, false, 3, false, offsets);
			});
        }
		
		private function loadAndSet():void
		{
			var loader:Loader = new Loader();
			var req:URLRequest = new URLRequest("http://wonderfl.net/static/tmp/related_images/8eb64931e696097e3df29d12e4a817c87a49fafdm");
			loader.load(req, new LoaderContext(true));
			loader.contentLoaderInfo.addEventListener(Event.INIT, function(e:Event):void
			{
				var l:Loader = new Loader();
				l.loadBytes(loader.contentLoaderInfo.bytes);
				l.contentLoaderInfo.addEventListener(Event.COMPLETE, function(e:Event):void
				{
					bmpdata = new BitmapData(l.width, l.height);
					view = new BitmapData(l.width, l.height);
					bmpdata.draw(l);
					addChild(new Bitmap(view)).x=70;
					mapFilter.scaleX = l.width / 2;
					mapFilter.scaleY = l.height / 2;
					isLoadComp = true;
				});
			});
		}
    }
}