Forked from:: _mutast's ビートを検知してpv3dでエフェクト

Metaballs shader + beat detection

Wonderfl won't let me change the license, but most of
_mutast's original code is gone (see the diff).
I don't know (or care) what that implies legally, but
as far as I'm concerned you can do whatever you want
with the code.

yonatan

forked:22
favorite:96
lines:129
license : All rights reserved
modified : 2010-03-18 15:39:02

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// forked from _mutast's ビートを検知してpv3dでエフェクト

// Wonderfl won't let me change the license, but most of 
// _mutast's original code is gone (see the diff).
//
// I don't know (or care) what that implies legally, but
// as far as I'm concerned you can do whatever you want
// with the code.

package 
{
    /**
    * ...
    * @author swc
    * 音はTsabeat より拝借
    * http://www.ektoplazm.com/free-music/tsabeat-warp-speed-ep/
    */

import flash.display.*;
    import flash.events.*;
    import flash.filters.*;
    import flash.media.*;
    import flash.net.URLRequest;
    import flash.system.Security;
    import flash.utils.*;
    import flash.geom.*;
    import mx.utils.*;
    import caurina.transitions.Tweener;

[SWF(backgroundColor="#000000", frameRate=30)]
    public class  Main extends Sprite {
        private var channel:SoundChannel;
        private var trans:SoundTransform;
        private var mySound:Sound;
        private var beats:Number = 0;

private var shader:Shader;
        private var filter:ShaderFilter;

public static const SIZE:Number = 465/2;
        public var r:Number = 0;
        public var br:Number = 1;
        public var exp:Number = 20;
        public var offset:Number = 0;
        
        public var cvs:Bitmap;
        public var bmd:BitmapData;
        
        public function Main() {
            stage.quality = "low";
            Wonderfl.capture_delay(15);
            Security.loadPolicyFile("http://mutast.heteml.jp/crossdomain.xml");
            mySound = new Sound();
            mySound.addEventListener(Event.COMPLETE, play);
            mySound.load(new URLRequest("http://mutast.heteml.jp/works/music/music.mp3"));
            init();
        }

public function init():void {
            var dec:Base64Decoder = new Base64Decoder;
            dec.decode(shaderString);
            filter = new ShaderFilter(shader = new Shader(dec.drain()));
            shader.data["size"]["value"] = [SIZE, SIZE];
            shader.data["center1"]["value"] = [SIZE/2, SIZE/2, 1];
            shader.data["center2"]["value"] = [SIZE/2, SIZE/2, 1];
            shader.data["center3"]["value"] = [SIZE/2, SIZE/2, 1];

bmd = new BitmapData(SIZE, SIZE);
            cvs = new Bitmap(bmd);
            cvs.scaleX = cvs.scaleY = 2;
            addChild(cvs);

exp = 0;
            Tweener.addTween(this, {r: SIZE/4, br: 1000, exp: 20, time: 10, transition: "easeInSine"});
            addEventListener(Event.ENTER_FRAME, loop);
        }

public function play(e:Event):void {
            var channel:SoundChannel = new SoundChannel();
            channel = mySound.play();
            channel.addEventListener(Event.SOUND_COMPLETE, byebye);
        }

public function byebye(e:Event):void {
            Tweener.addTween( this, {
                    exp: 0,
                    offset: 20,
                    r: 0,
                    br: 1,
                    delay: 0.2,
                    time: 10,
                    transition: "easeOutSine",
                    onComplete: function():void { 
                        removeEventListener(Event.ENTER_FRAME, loop);
                    }
                });
        }

public function hit():void {
            if (!beats) {
                Tweener.removeAllTweens();
            }
            beats++;
            exp = 0;
            Tweener.addTween(this, { 
                    offset: Math.random() * (beats%2 ? 2 : -2), 
                    time: 0.36, transition: "easeInQuart",
                    br: Math.random() * 1500 + 300, 
                    r: Math.random() * SIZE / 4 + SIZE / 6 });
        }

public function loop(e:Event):void {
            var bytes:ByteArray = new ByteArray();
            SoundMixer.computeSpectrum(bytes, false, 0);
            bytes.position = 0;
            var rf:Number;
            var count:int = 0;
            for (var q:int = 0; bytes.bytesAvailable >= 4; q++) {
                rf = bytes.readFloat();
                var t:Number = Math.abs(rf);
                if (t >= 0.4 && q >256) {
                    count ++;
                }
                if (count >= 110) {
                    hit();
                }
            }

var time:Number = offset + getTimer() / 600;

var s:Function = Math.sin;
            var c:Function = Math.cos;
            var pi:Number = Math.PI;
            var ctr:Number = SIZE/2;
            var t1:Number = time;
            var t2:Number = time + 3.14 * 2 / 3;
            var t3:Number = time + 3.14 * 4 / 3;
            
            shader.data["size"]["value"] = [SIZE, SIZE];
            shader.data["exponent"]["value"] = [exp];
            if(beats) {
                var pow:Number = Math.max(0, 15 - count/150*15);
                if( exp < pow ) {
                    exp  = (exp*11+pow) / 12;
                } else {
                    exp = pow;
                }
                shader.data["center1"]["value"] = [ctr + r*s(t1) - r/3*c(t1*1.5), ctr - r*c(t1) + r/4*s(t1*1.5), br + br * s(t1) / 2];
                shader.data["center2"]["value"] = [ctr + r*s(t2) - r/3*c(t2*1.5), ctr - r*c(t2) + r/4*s(t2*1.5), br + br * s(t2) / 2];
                shader.data["center3"]["value"] = [ctr + r*s(t3) - r/3*c(t3*1.5), ctr - r*c(t3) + r/4*s(t3*1.5), br + br * s(t3) / 2];
            } else {
                shader.data["center1"]["value"] = [ctr + r*s(t1) - r/3*c(t1), ctr - r*c(t1) + r/4*s(t1), br + br/2*s(t1*5)];
                shader.data["center2"]["value"] = [ctr + r*s(t2) - r/3*c(t2), ctr - r*c(t2) + r/4*s(t2), br + br/2*s(t2*5)];
                shader.data["center3"]["value"] = [ctr + r*s(t3) - r/3*c(t3), ctr - r*c(t3) + r/4*s(t3), br + br/2*s(t3*5)];
            }
            
            bmd.applyFilter(bmd, bmd.rect, new Point(0,0), filter);
        }
        
        private var shaderString:String = "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";
    }
}

/* Shader:

parameter "_OutCoord", float2, f0.rg, in

texture  "src", t0

parameter "dst", float4, f1, out

parameter "size", float2, f2.rg, in
meta  "defaultValue", 512, 512
meta  "minValue", 0, 0
meta  "maxValue", 512, 512

parameter "exponent", float, f4.r, in ; cutoff
meta  "defaultValue", 10
meta  "minValue", 0
meta  "maxValue", 100

parameter "center1", float3, f5.rgb, in ; x, y, size
meta  "defaultValue", 150, 160, 10160
meta  "minValue", 0, 0, 0
meta  "maxValue", 1, 1, 40000

parameter "center2", float3, f6.rgb, in
meta  "defaultValue", 100, 400, 11160
meta  "minValue", 0, 0, 0
meta  "maxValue", 1, 1, 40000

parameter "center3", float3, f7.rgb, in
meta  "defaultValue", 400, 50, 11160
meta  "minValue", 0, 0, 0
meta  "maxValue", 1, 1, 40000

;----------------------------------------------------------

set f1.rgb, 0

mov f3.ba, f5.rg
sub f3.ba, f0.rg
mul f3.ba, f3.ba
add f3.a, f3.b
mov f3.b, f5.b
div f3.b, f3.a
add f1.r, f3.b