AS3.0频谱-01

AS3.0频谱系列-01：

package fengzi.spectrum

{

	//import fengzi.colors.GetColor;

	import flash.display.Sprite;

	import flash.events.Event;

	import flash.events.TimerEvent;

	import flash.geom.Point;

	import flash.geom.Rectangle;

	import flash.media.SoundMixer;

	import flash.utils.ByteArray;

	import flash.utils.Timer;

	import flash.geom.Matrix;

	import flash.display.BitmapData;

	import flash.display.Bitmap;

	import flash.geom.ColorTransform;

	import flash.filters.BlurFilter;

	import flash.filters.DisplacementMapFilter;

	public class Spectrum_01 extends Sprite

	{

		private var _sprite:Sprite;

		private var timer:Timer;

		private var thisW:Number;

		private var thisH:Number;

		private var byteArray:ByteArray;

		var sDis:Number = 30;

		var lDis:Number = 100;

		var maxDis:Number;

		var bitmapData:BitmapData;

		private var bitmap:Bitmap;

		var colorTF:ColorTransform = new ColorTransform(0.90,1,1,0.90);

		var numArr:Array = [];

		private var onBg:Boolean;

		private var color:uint;

		/**

		 * Spectrum_01   构造函数（实例）

		 * @param        width           宽

		 * @param        height          高

		 * @param        _color          颜色

		 * @param        onBg            黑色背景的布尔值（默认false黑色背景，true透明）

		 */

		public function Spectrum_01(width:Number=550,height:Number=400,_color:uint=0xFF00FF,_onBg:Boolean=false)

		{

			thisW = width;

			thisH = height;

			color = _color;

			onBg = _onBg;

			maxDis = height / 4;

			byteArray = new ByteArray  ;

			_sprite = new Sprite  ;

			for (var i:int = 0; i < 256; ++i)

			{

				numArr[i] = 0;

			}

			bitmapData = new BitmapData(thisW,thisH,onBg,0);

			bitmap = addChild(new Bitmap(bitmapData)) as Bitmap;

			addChild(_sprite);

			timer = new Timer(30);

			timer.addEventListener(TimerEvent.TIMER,timerHandler);

			timer.start();

		}

		/**

		 * onStageReSize()

		 * Event.RESIZE时调用此方法，频谱随舞台缩放

		 */

		public function onStageReSize():void

		{

			thisW = stage.stageWidth;

			thisH = stage.stageHeight;

			maxDis = height / 4;

			if (bitmapData)

			{

				bitmapData.dispose();

			}

			bitmapData = new BitmapData(thisW,thisH,onBg,0);

			bitmap = addChild(new Bitmap(bitmapData)) as Bitmap;

		}

		private function timerHandler(event:TimerEvent):void

		{

			var aPower:Number = 3;

			var num:Number;

			SoundMixer.computeSpectrum(byteArray,false);

			aPower /=  2;

			_sprite.graphics.clear();

			_sprite.graphics.lineStyle(1,color);

			for (var i:int = 0; i < 128; i++)

			{

				num = Math.abs(byteArray.readFloat() + 0.1);

				numArr[i] +=  ((num - numArr[i]) * 0.25);

				num = numArr[i];

				_sprite.graphics.drawCircle(((thisW / 2) + Math.sin(((((i * 360) / 128) * Math.PI) / 180)) * (sDis + num * maxDis)),thisH / 2 + Math.cos(((((i * 360) / 128) * Math.PI) / 180)) * (sDis + num * maxDis),num * 20);

			}

			_sprite.graphics.beginFill(0xFF33FF,1);

			for (i = 0; i < 128; ++i)

			{

				num = Math.abs(byteArray.readFloat() + 0.1);

				numArr[i] +=  ((num - numArr[i]) * 0.25);

				_sprite.graphics.drawCircle(((thisW / 2) + Math.sin(((((i * 360) / 128) * Math.PI) / 180)) * (lDis + num * maxDis)),thisH / 2 + Math.cos(((((i * 360) / 128) * Math.PI) / 180)) * (lDis + num * maxDis),num * num * 10);

			}

			bitmapData.draw(_sprite);

			//bitmapData.fillRect( new Rectangle( 0,0, bitmapData.width, 1 ), 0 );

			//bitmapData.fillRect( new Rectangle( 0,0, 1, bitmapData.height ), 0 );

			//bitmapData.scroll( aPower *0, aPower *0);

			bitmapData.colorTransform(bitmapData.rect,colorTF);

			bitmapData.applyFilter(bitmapData,bitmapData.rect,new Point  ,new BlurFilter(2,2));

			bitmapData.applyFilter(bitmapData,bitmapData.rect,new Point  ,new DisplacementMapFilter(bitmapData,new Point  ,1,2,5,5,"clamp"));

		}

	}

}