class Buzzer{
  float x;
  float y;
  Buzzer[] otherBuzzers;
  FFT fft;
  BB_Simulation dad;
  float freq;
  float ampli;
  AudioOutput world;
SineWave voice;
  SineWave[] voicesHeard = new SineWave[totalBuzzers];
  AudioSignal ambientSignal;
  int historyLength = 1000;
  float[] freqHistory = new float[historyLength];
  float[] ampliHistory = new float[historyLength];
  float[] avgFreqHistory = new float[historyLength];
  float movingAveDFreq = 0f;
  BandPass bpf;
  int freqDenominator = 12;
  int freqMultiplier = freqDenominator;

  Buzzer(BB_Simulation d ){
    fft = new FFT(bufferSize, rate);
    bpf = new BandPass(2000, 1600, rate);

    freq = random(100, 200);
    ampli = random(.001,.01);
    voice = new SineWave(freq, ampli, rate);
    dad = d;
    x = random(tableWidth);
    y = random(tableHeight);
    world = minim.getLineOut(Minim.STEREO, bufferSize, rate);
    world.addSignal(dad.ambientSignal);
  }

  void init(){
    world.addEffect(bpf);
    world.mute();
    for (int i =0; i< historyLength; i++){
      freqHistory[i] = 0f;
      ampliHistory[i] = 0f;
      avgFreqHistory[i] = 0f;
    }
    for (int i = 0 ; i < dad.totalBuzzers ; i++){
      Buzzer b = dad.buzzers[i];
      if (b != this){
        float distSquared = (this.x-b.x)*(this.x-b.x)  +(this.y-b.y)*(this.y-b.y);
        voicesHeard[i]  = new SineWave(b.freq, b.ampli * .01/(1+distSquared), rate);
        world.addSignal(voicesHeard[i]);
      }
    }
  }

  void calc(){   
    world.clearSignals();
    world.addSignal(dad.ambientSignal);
    for (int i = 0 ; i < dad.totalBuzzers ; i++){
      Buzzer b = dad.buzzers[i];
      if (b != this){
        float distSquared = (this.x-b.x)*(this.x-b.x)  +(this.y-b.y)*(this.y-b.y);
        voicesHeard[i]  = new SineWave(b.freq, b.ampli * .01/(10 + distSquared), rate);
        world.addSignal(voicesHeard[i]);
      }
    }

    voice = new SineWave(freq, ampli, rate);
    fft.forward(world.mix);

    float drag = .5f;
    
    float ampliDrag = .1f/drag;
    float sum = 0f;
    float prodSum = 0f;
    for (int i=0; i<fft.specSize(); i++) {
      sum     += fft.getBand(i);
      prodSum += fft.getBand(i) * ((float)(i)/(float)bufferSize)*rate;
    }   

    float avgFreq = prodSum/sum ;
    freqMultiplier = max(round(freq*freqDenominator/avgFreq), freqDenominator/4);
    
    float newFreq = freqMultiplier*avgFreq/freqDenominator;
    freq = freq + drag*(newFreq - freq);
    
    float dFreq  = movingAveDFreq*(1-ampliDrag) + ampliDrag*(freq - newFreq)*(freq - newFreq);
    ampli = max(min(ampli * (0.99 + 0.08*atan(dFreq/100)/(PI/2)), 1), .1);

    System.arraycopy(freqHistory, 0, freqHistory, 1, historyLength-1);
    freqHistory[0] = freq;
    
    System.arraycopy(avgFreqHistory, 0, avgFreqHistory, 1, historyLength-1);
    avgFreqHistory[0] = avgFreq;
    
    System.arraycopy(ampliHistory, 0, ampliHistory, 1, historyLength-1);
    ampliHistory[0] = ampli;
    
    voice = new SineWave(freq, ampli, rate);
  }
}