Line Visualizer

音をグラフィックで表現する練習その2。
ファンがすごい回る。

by su8erlemon 14 Jul 2012

Embed

/**
 * Copyright su8erlemon ( http://wonderfl.net/user/su8erlemon )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/xjg6
 */

package  {
    import flash.display.Shape;
    import flash.display.Stage;
    import flash.events.Event;
    import flash.display.MovieClip;
    import flash.display.Sprite;
    import flash.geom.PerspectiveProjection;
    import flash.geom.Point;
    import flash.display.StageQuality;
    import flash.events.MouseEvent;
    import frocessing.color.ColorHSV;
    import flash.filters.BlurFilter;
    import flash.filters.GlowFilter;
    import flash.display.BlendMode;
    import frocessing.color.ColorHSL;
    import flash.utils.Timer;
    import flash.utils.getTimer;
    import flash.media.Sound;
    import flash.utils.ByteArray;
    import flash.net.URLRequest;
    import flash.media.SoundMixer;
    import flash.media.SoundChannel;
    import flash.system.Security;
    import flash.filters.ColorMatrixFilter;
    
    [SWF(width="465", height="465", frameRate="60", backgroundColor="0x000000")]
    public class Main extends MovieClip{

        private const SW:int = 465;
        private const SH:int = 465;
        
        private var st:Sprite = new Sprite();
        
        private var rl:Number = 0;
        
        private var circles:Array = [];
        private var lines:Array = [];
        
        private var sound:Sound = new Sound();
        
        private var spectBytes:ByteArray = new ByteArray();
        private var spectrum:Vector.<Number> = new Vector.<Number>(512, true);
        private var spectrumAverage:Number = 0.0;
        
        private var oldX:Number;
        private var oldY:Number;
        
        private var shake:int=1;
        private var tension:Number=0.5;

        public function Main() {
            Security.loadPolicyFile('http://su8erlemon.com/crossdomain.xml');
            sound.addEventListener(Event.COMPLETE, soundLoadCompleteHandler);
            sound.load(new URLRequest('http://su8erlemon.com/lab/music/music3.mp3'));
            
        }
        
        private function soundLoadCompleteHandler(e:Event):void{
            sound.removeEventListener(Event.COMPLETE, soundLoadCompleteHandler);
            init();
        }
        
        private function init():void{
            var bl:Shape = new Shape();
            bl.graphics.beginFill(0x000000,1);
            bl.graphics.drawRect(0,0,465,465);
            bl.graphics.endFill();
            addChild(bl);            
            
            st.graphics.beginFill(0x00ff00,0);
            st.graphics.drawRect(-100,-100,200,200);
            st.graphics.endFill();
            st.x = SW/2;
            st.y = SH/2;            
            addChild(st);
                                    
            addEventListener(Event.ENTER_FRAME,loop);

            var sc:SoundChannel = sound.play();
            sc.addEventListener(Event.SOUND_COMPLETE, soundCompleteHandler);
        }
        
        private function soundCompleteHandler(e:Event):void{
            var sc:SoundChannel = e.target as SoundChannel;
            
            sc.removeEventListener(Event.SOUND_COMPLETE, soundCompleteHandler);
            sc.stop();
            sc = sound.play();
            sc.addEventListener(Event.SOUND_COMPLETE, soundCompleteHandler);
        }
        
    
        private function loop(e:Event):void{            
            computeSpectrum();
            
            rl += tension-spectrumAverage*0.6;
            
            
            tension += (1 - (tension + spectrumAverage*1.5 ))/10;
            
            var www:int = int(spectrumAverage*80);
                            
            var line:Shape = new Shape();
            line.graphics.lineStyle(1,0xffffff);
            line.graphics.moveTo(oldX,oldY);
                
            var ww:int = (150 + int(shake)*www/2 - Math.random() * www/4)*Math.sin(rl*0.58);
            var hh:int = (150 + int(shake)*www/2 - Math.random() * www/4)*Math.cos(rl*0.58);
        
            var circle:Shape = new Shape();
            circle.graphics.beginFill(0xffffff,1);
            circle.graphics.drawCircle(ww,hh,3);
            circle.graphics.endFill();
            circles.push(circle);
            st.addChild(circle);
                
            line.graphics.lineTo(ww,hh);
            lines.push(line);
            st.addChild(line);
                
            oldX = ww;
            oldY = hh;
            
            var ll:int = circles.length;
            for(var i:uint = 0;i<ll;i++){
                circles[i].alpha += (0-circles[i].alpha)*(0.4 -  spectrumAverage*0.25);
                lines[i].alpha += (0-lines[i].alpha)*(0.4 -  spectrumAverage*0.25);
                if(circles[i].alpha <= 0){
                    if(circles[i].parent!=null)circles[i].parent.removeChild(circles[i]);
                    if(lines[i].parent!=null)lines[i].parent.removeChild(lines[i]);
                }
            }
            
            shake = shake * -1;
        }
        
        
        private function computeSpectrum():void{
            var bytes:ByteArray = spectBytes;
            bytes.position = 0;
            
            SoundMixer.computeSpectrum(bytes, false);
            
            var total:Number = 0;
            var plus:Number = 0;
            var pc:uint = 0.0001;
            var minus:Number = 0;
            var mc:uint =  0.0001;
            var numbers:Vector.<Number> = spectrum;
            for (var i:uint = 0; i < 512; ++i) {
                var n:Number = bytes.readFloat() * 2.0;
                total += Math.abs(n);
                if (n > 0) {
                    plus += n;
                    ++pc;
                }
                else if (n < 0) {
                    minus += n;
                    ++mc;
                }
                numbers[i] = n;
            }
            spectrumAverage = total / 512.0 * 2;
        }
    }
}