Wave

forked:21
favorite:124
lines:109
license : MIT License
modified : 2008-12-25 18:27:22

package {
	
	import flash.display.Bitmap;
	import flash.display.BitmapData;
	import flash.display.Graphics;
	import flash.display.Shape;
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.MouseEvent;
	import flash.filters.BitmapFilter;
	import flash.filters.BitmapFilterQuality;
	import flash.filters.BlurFilter;
	import flash.filters.ColorMatrixFilter;
	import flash.filters.ConvolutionFilter;
	import flash.geom.Matrix;
	import flash.geom.Point;
	
	[SWF(width=465,height=465,backgroundColor=0x000000,frameRate=30)]

public class WaveTest extends Sprite {
		
		private static const SCALE:Number = 3;
		
		private static const ZERO_POINT:Point = new Point(0, 0);
		private static const ZERO_ARRAY:Array = new Array(256);
		
		private var _target:Sprite;
		private var _square:Shape;
		private var _canvas:BitmapData;
		private var _final:BitmapData;
		private var _drawMtx:Matrix;
		private var _filters:Array;
		private var _emboss:BitmapFilter;
		private var _waveMap:Array;
		private var _phongMap:Array;
		
		public function WaveTest() {
			this._canvas = new BitmapData(465 / SCALE, 465 / SCALE, false, 0x0);
			this._final = this._canvas.clone();
			var bm:Bitmap = this.addChild(new Bitmap(this._final)) as Bitmap;
			bm.scaleX = bm.scaleY = SCALE;
//			this._target = this.addChild(new Sprite()) as Sprite;
			this._target = new Sprite();
			var sh:Shape = this._target.addChild(new Shape()) as Shape;
			var g:Graphics = sh.graphics;
			g.beginFill(0xffffff);
//			g.drawRect(-50, -50, 100, 100);
			g.drawEllipse(-50, -50, 100, 100);
			g.endFill();
			sh.x = 320;
			sh.y = 240;
			sh.alpha = 1;
			this._square = sh;
			this._drawMtx = new Matrix(1 / SCALE, 0, 0, 1 / SCALE, 0, 0);
			
			this._filters = [];
			this._filters.push(new BlurFilter(16, 16, BitmapFilterQuality.LOW));
			var a:Number = 1;
			var b:Number = -0;
			this._filters.push(new ColorMatrixFilter([
				a, 0, 0, 0, b,
				0, a, 0, 0, b,
				0, 0, a, 0, b,
				0, 0, 0, 1, 0
			]));
			
			this._emboss = new ConvolutionFilter(3, 3, [
				2, 0, 0,
				0, -1, 0,
				0, 0, -1
			], 3, 0x80);

this._waveMap = [];
			var n:int = 256;
			var c:int;
			while (n--) {
				c = int((Math.sin(n / 256 * Math.PI * 6) + 1) * 0x7f);
				this._waveMap.push((c << 16) | (c << 8) | c);
			}
			
			this._phongMap = this._createPhongMap(0xffffff, 20, 0x00aaff, 0x00000);
			
			this.stage.addEventListener(Event.ENTER_FRAME, this._update);
		}
		
		private function _createPhongMap(specular:uint = 0xffffff, power:int = 50, diffuse:uint=0x808080, ambient:uint=0x000000):Array {
			var col:Array = [];
			const sr:int = (specular >> 16) & 0xff;
			const sg:int = (specular >> 8) & 0xff;
			const sb:int = specular & 0xff;
			const dr:int = (diffuse >> 16) & 0xff;
			const dg:int = (diffuse >> 8) & 0xff;
			const db:int = diffuse & 0xff;
			const ar:int = (ambient >> 16) & 0xff;
			const ag:int = (ambient >> 8) & 0xff;
			const ab:int = ambient & 0xff;
			var i:int = 256;
			var ks:Number, kd:Number;
			while (i--) {
				ks = Math.pow(Math.cos(i / 256 * Math.PI / 2), power);
				kd = 1 - (i / 256);
				col.push(
					(Math.min(0xff, ar + kd * dr + ks * sr) << 16) |
					(Math.min(0xff, ag + kd * dg + ks * sg) << 8) |
					(Math.min(0xff, ab + kd * db + ks * sb))
				);
			}
			return col;
		}
		
		private function _update(e:Event):void {
			this._square.x = this.mouseX;
			this._square.y = this.mouseY;
			this._canvas.draw(this._target, this._drawMtx);
			for each(var f:BitmapFilter in this._filters) {
				this._canvas.applyFilter(this._canvas, this._canvas.rect, ZERO_POINT, f);
			}
			this._final.draw(this._canvas);
			this._final.paletteMap(this._final, this._final.rect, ZERO_POINT, this._waveMap, ZERO_ARRAY, ZERO_ARRAY);
			var n:int = 3;	while (n--)	this._waveMap.push(this._waveMap.shift());
			this._final.applyFilter(this._final, this._final.rect, ZERO_POINT, this._emboss);
			this._final.paletteMap(this._final, this._final.rect, ZERO_POINT, this._phongMap, ZERO_ARRAY, ZERO_ARRAY);
		}
		
	}
	
}

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