AS3.0 사운드 스펙트럼을 이용한 비트맵 드로우

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(); } } }