flash on 2010-1-5

/**
 * Copyright yama3 ( http://wonderfl.net/user/yama3 )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/radE
 */

package {
	import flash.display.Sprite;
	import flash.display.BitmapData;
	import flash.display.Bitmap;
	import flash.geom.Matrix;
	import flash.geom.ColorTransform;
	import flash.display.BlendMode;
	import flash.geom.Point;
	import flash.display.BitmapDataChannel;
	import flash.filters.DisplacementMapFilter;
	import flash.events.Event;
	import flash.events.MouseEvent;
	
	[SWF(width = 465, height = 465, backgroundColor = 0, frameRate = 30)]
	
	public class BitmapDataSample8 extends Sprite {
		private var bmpdata:BitmapData;
		private var sprite:Sprite;
		private var matrix:Matrix;
		private var colortrans:ColorTransform;
		private var filter:DisplacementMapFilter;
		
		public function BitmapDataSample8() {
			bmpdata = new BitmapData(465, 465, false, 0);
			addChild(new Bitmap(bmpdata));
			sprite = newFig(0, 0, 40, 0xffffff);
			matrix = new Matrix();
			colortrans = new ColorTransform();
			
			var mapBitmap:BitmapData = new BitmapData(465, 465, false, 0);
			var mapPoint:Point = mapBitmap.rect.topLeft;
			var componentX:uint = BitmapDataChannel.RED;
			var componentY:uint = BitmapDataChannel.GREEN;
			var scaleX:Number = 256;
			var scaleY:Number = 256;
			var r:uint = 128 + 2;
			var g:uint = 128 + 1;
			var b:uint = 128;
			var col:uint = r << 16 | g << 8 | b;
			mapBitmap.fillRect(mapBitmap.rect, col);
			filter = new DisplacementMapFilter(mapBitmap, mapPoint, componentX, componentY, scaleX, scaleY);
			addEventListener(Event.ENTER_FRAME, enterframe);
			stage.addEventListener(MouseEvent.CLICK, reset);
		}
		
		private function enterframe(e:Event):void {
			bmpdata.applyFilter(bmpdata, bmpdata.rect, bmpdata.rect.topLeft, filter);
			
			matrix.identity();
			var s:Number = Math.random() * 2;
			matrix.scale(s, s);
			matrix.rotate(Math.PI * Math.random());
			matrix.translate(mouseX, mouseY);
			
			colortrans.greenMultiplier = mouseX / 465;
			colortrans.blueMultiplier = mouseY / 465;
			colortrans.alphaMultiplier = Math.random();
			bmpdata.draw(sprite, matrix, colortrans, BlendMode.ADD);
		}
		
		private function reset(e:MouseEvent):void {
			bmpdata.fillRect(bmpdata.rect, 0xff000000);
		}
		
		private function newFig(cx:Number, cy:Number, size:Number, col:uint):Sprite {
			var shape:Sprite = new Sprite();
			shape.graphics.lineStyle(0, 0x000000, 0.3);
			shape.graphics.beginFill(col);
			shape.graphics.drawCircle(cx, cy, size * 0.5);
			shape.graphics.drawCircle(cx, cy, size * 0.4);
			var w:Number = size * 0.6;
			var h:Number = size * 0.15;
			shape.graphics.drawRect(cx - w / 2,cy - h / 2, w, h);
			shape.graphics.endFill();
			return shape;
		}
	}
}