int biggestBlob() {
  Blob b;
  int bigdex = 0;
  float s=0, biggestS=0;
  for (int i=0; i<bd.getBlobNb(); i++) {
    b = bd.getBlob(i);
    s = b.w*b.h;
    if(s>biggestS) {
      biggestS = s;
      bigdex = i;
    }
  }
  return bigdex;
}

// way too much stuff happens here.    ...whatever
void drawOneAtOrigin(int which) {
  if(weSmooth) smooth();
  else noSmooth();
  pushMatrix();
  noFill();
  Blob b = bd.getBlob(which);
  EdgeVertex eA,eB;
  if (b!=null) {
    translate((0.5-(b.w)/2)*width, (0.5-(b.h)/2)*height);
    strokeWeight(1);
    stroke(255,0,0);
    rect(0,0, b.w*width, b.h*height);
    //synth.lpf.frequency.set(b.w*2000);
    synth.adjustFilter(b.w);
    synth.adjustFrequency(b.h);
    
    // draw the blob
    strokeWeight(2);
    int edgeCount = b.getEdgeNb();
    int per = edgeCount / (NUM_HARMONICS);
    //println("per "+per);
    int partial=1;
    double[] harmonics = new double[NUM_HARMONICS+1];
    for(int i=1; i<harmonics.length; i++) harmonics[i] = 0.0;
    
    for (int m=0;m<edgeCount;m++) {
      stroke(0,255,0);
      eA = b.getEdgeVertexA(m);
      eB = b.getEdgeVertexB(m);
      if (eA!=null && eB!=null) {
        line((eA.x-b.xMin)*width, (eA.y-b.yMin)*height,
             (eB.x-b.xMin)*width, (eB.y-b.yMin)*height);
      }
      if(per>1) {
        if(m % per == 0) {
          //println(m);
          stroke(0,0,255);
          line(b.w/2*width, b.h/2*height, (eA.x-b.xMin)*width, (eA.y-b.yMin)*height);
          r = constrain(dist(b.w/2*width, b.h/2*height, (eA.x-b.xMin)*width, (eA.y-b.yMin)*height)/(width/2),0,1);
          if(partial<NUM_HARMONICS) harmonics[partial] = r;
          partial++;
        }
      }
    }
    synth.setPartials(harmonics);
  }
  popMatrix();
}

void drawOne(int which) {
  noFill();
  Blob b = bd.getBlob(which);
  EdgeVertex eA,eB;
  if (b!=null) {
    if (drawEdges) {
      strokeWeight(2);
      stroke(0,255,0);
      for (int m=0;m<b.getEdgeNb();m++){
        eA = b.getEdgeVertexA(m);
        eB = b.getEdgeVertexB(m);
        if (eA !=null && eB !=null)
          line(eA.x*width, eA.y*height, eB.x*width, eB.y*height);
      }
    }

    if (drawBlobs) {
      strokeWeight(1);
      stroke(255,0,0);
      rect(b.xMin*width, b.yMin*height, b.w*width, b.h*height);
    }
  }
}

void drawBlobsAndEdges() {
  noFill();
  Blob b;
  EdgeVertex eA,eB;
  for (int n=0; n<bd.getBlobNb(); n++) {
    b=bd.getBlob(n);
    if (b!=null) {
      if (drawEdges) {
        strokeWeight(2);
        stroke(0,255,0);
        for (int m=0;m<b.getEdgeNb();m++){
          eA = b.getEdgeVertexA(m);
          eB = b.getEdgeVertexB(m);
          if (eA !=null && eB !=null)
            line(eA.x*width, eA.y*height, eB.x*width, eB.y*height);
        }
      }

      if (drawBlobs) {
        strokeWeight(1);
        stroke(255,0,0);
        rect(b.xMin*width, b.yMin*height, b.w*width, b.h*height);
      }
    }
  }
}