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AS3.0 사운드 스펙트럼을 이용한 비트맵 드로우

AS3/ActionScript 2010/03/21 01:00 |

비트맵 드로울 이용한 사운드 스펙트럼입니다.

사운드 스펙트럼 부분은 자수님 올려주신 내용을 참고했습니다.

BGM 출처 : http://www.freebgm.net/v3/?mid=freebgm&category=33321&document_srl=107600

package {
	import flash.display.Bitmap;
	import flash.display.BitmapData;
	import flash.display.MovieClip;
	import flash.events.Event;
	import flash.events.MouseEvent;
	import flash.geom.Point;
	import flash.geom.Rectangle;
	import flash.media.Sound;
	import flash.media.SoundChannel;
	import flash.media.SoundMixer;
	import flash.net.URLRequest;
	import flash.utils.ByteArray;

public class BitmapCircle extends MovieClip{
		private var s:Sound;
		private var sc:SoundChannel;
		private var ba:ByteArray;

private var rightPeak:Number;
		private var leftPeak:Number;
				
		private var targetX:Number;
		private var targetY:Number;
		
		private var prevX:Number;
		private var prevY:Number;
		
		private var p1Speed:Number;
		private var p2Speed:Number;
		private var thicks:int;
		private var color:Number;
		private var bmpData:BitmapData;
		private var drawMc:MovieClip;
		private var bitmap:Bitmap;
		
		private var pointA:Point;
		private var pointB:Point;
		
		
		public function BitmapCircle() {
			// constructor code
			init();
			playGame();
		}
		private function init():void{
			s = new Sound();
			ba = new ByteArray();
			s.load(new URLRequest("bluenite.mp3"));
			
			targetX = 0;
			targetY = 0;
			
			prevX = 0;
			prevY = 0;
			
			p1Speed = 0.08;
			p2Speed = 0.09;
			thicks = 1;
			color = 0xffffff;
			bmpData = new BitmapData( 550, 400, false, 0x333333);
			drawMc = new MovieClip();
			bitmap = new Bitmap( bmpData );
			
			pointA = new Point( 0, 0 );
			pointB = new Point( 0, 0 );
			
			stage.addEventListener(MouseEvent.MOUSE_DOWN, stageDownHandler );
			addChild( bitmap );
		}
		private function stageDownHandler( e:MouseEvent ):void {
			bmpData.fillRect( new Rectangle(0, 0, 550, 400 ), 0x00333333 );
		}
		
		private function playGame():void {
			playSound();
			addEventListener( Event.ENTER_FRAME, enterFrameHandler );
		}
		
		private function stopGame():void {
			removeEventListener( Event.ENTER_FRAME, enterFrameHandler );
		}
		
		private function playSound():void {
			sc = s.play(0,1);
			
			this.addEventListener(Event.ENTER_FRAME, spectrum);
	
		}
		private function stopSound():void {
			sc.stop();
		}
		private function spectrum(event:Event):void {
	        var a:Number = 0;
	        SoundMixer.computeSpectrum(ba,true,0);
	        a = ba.readFloat();
	        rightPeak = a*70*sc.rightPeak;
			leftPeak = a*70*sc.leftPeak;
			
		}
		
		private function enterFrameHandler( e:Event ):void {
			prevX = pointB.x;
			prevY = pointB.y;
			
			var dx:int = pointA.x - prevX;
			var dy:int = pointA.y - prevY;
			var dv:int = Math.abs( dx );
			var dis:int = Math.sqrt( dv );
			drawMc.graphics.moveTo( prevX,prevY );
			drawMc.graphics.lineStyle( rightPeak / 9, color, 1 );
			
			
			if( rightPeak > 40 || leftPeak > 40 ){
				targetX = Math.random() * 550;
				targetY = Math.random() * 400;
				color =  0xffffff *  Math.random();
				
				
				drawMc.graphics.drawCircle( pointB.x + Math.random() * 35, pointB.y + Math.random() * 35, rightPeak / 2);
			}else
			{
				color =  0x222222;
				drawMc.graphics.drawCircle( pointB.x + Math.random() * 35, pointB.y + Math.random() * 35, rightPeak );
			}
			
			bmpData.draw( drawMc );
			
			
			
			
			pointB.x = pointB.x + p1Speed *( pointA.x - pointB.x );
			pointB.y = pointB.y + p1Speed *( pointA.y - pointB.y );
			
			pointA.x = pointA.x + p2Speed *( targetX - pointA.x );
			pointA.y = pointA.y + p2Speed *( targetY - pointA.y );
			
			drawMc.graphics.clear();
		}

}
	
}

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