class Agent {

  // for data smoothing
  int SAMPLES = 20;
  int PERSISTENCE=10;
  int curr;
  int id;
  int lastseen;
  boolean avgcalcd;
  boolean finishflag;
  
  int[] sx = new int[SAMPLES];
  int[] sy = new int[SAMPLES];
  int[] sw = new int[SAMPLES];
  int[] sh = new int[SAMPLES];

  float ax, ay, aw, ah;

  Agent(int i, int x, int y, int w, int h) {
    fillAvg(x, y, w, h);
    id=i;
    curr=0;
    lastseen=PERSISTENCE;
    avgcalcd=false;
    finishflag=false;
  }
  
  void fillAvg(int x, int y, int w, int h) {
    for(int i=0;i<SAMPLES;i++) {
      sx[i]=x;
      sy[i]=y;
      sw[i]=w;
      sh[i]=h;
    }
  }

  void initializeAvg() {
    for(int i=0;i<SAMPLES;i++) {
      sx[i]=0;
      sy[i]=0;
      sw[i]=0;
      sh[i]=0;
    }
  }

  void calcAvg() {
    ax=0;
    ay=0;
    aw=0;
    ah=0;
    for(int i=0;i<SAMPLES;i++) {
      ax+=sx[i];
      ay+=sy[i];
      aw+=sw[i];
      ah+=sh[i];
    }
    ax/=SAMPLES;
    ay/=SAMPLES;
    aw/=SAMPLES;
    ah/=SAMPLES;
    avgcalcd=true;
  }

  void update(int x, int y, int w, int h) {
    curr++;
    if(curr>=SAMPLES)curr=0;
    sx[curr]=x;
    sy[curr]=y;
    sw[curr]=w;
    sh[curr]=h;
    calcAvg();
    lastseen=PERSISTENCE;
  }
  
  void drawAvg(int i) {
    if(!avgcalcd) calcAvg();
    stroke(0, 0, 255);
    rect( ax, ay, aw, ah);
    PImage face = frameimg.get(round(ax), round(ay), round(aw), round(ah));
    image(face, 750+225*(i/5), 225*(i%5), 200, 200);
    face.save(savePath(outpath+"/"+fname+"_"+id+"_"+str(myMovie.getCurrentFrameNumber())));
    fill(64, 64, 64);
    text(myMovie.time(), 800, 375);
    noFill();
  }

  void drawAvg() {
    drawAvg(0);
  }
  
  void relax() {
    lastseen--;
    if(lastseen<=0)
      finishflag=true;
  }

  boolean isFinished() {
    return finishflag;
  }
  
  float distance(int testx, int testy, int testw, int testh) {
    if(!avgcalcd) calcAvg();
    float tmp=dist(ax, ay, testx, testy);
    return tmp;
  }
}