void keyPressed() {
  switch(key){
  case ' ':
    // toggle the drawing flag - to lift the pen from the surface, virtually
    drawing = !drawing;
    break;
  case 'b':
  case 'B':
    // toggle the background flag
    drawBackground = !drawBackground;
    break;
  case 'f':
  case 'F':
    // toggle the frequency index display
    displayFrequencyIndex = !displayFrequencyIndex;
    break;
  case 'm':
  case 'M':
    // toggle mouse control
    mouseControl = !mouseControl;
    break;
  case 'l':
  case 'L':
    // toggle long lines
    longLines = !longLines;
    break;
  case 'h':
  case 'H':
    // toggle the help screen
    //displayHelp = !displayHelp;
    break;
  case 'c':
  case 'C':
    // toggle color drawing
    drawColor = !drawColor;
    break;
  case 'a':
  case 'A':
    // toggle autorotate
    autoRotate = !autoRotate;
    break;
    case 'r':
    case 'R':
    //recenter camera
    camera1.jump(width/2,height/2,-50);
      camera1.aim(0, 0, 0);
    
  } 
}

void mousePressed(){
  if(displayHelp){
    // if in the help mode, store a new value for the spectrum range
    int clickedBin = (int) map(mouseX,0,width,0,fftLog.avgSize());
    spectrumClickRange[0] = clickedBin;
  } 
  else {
    cameraControlPress(); 
  }


  println("history index: " + historyIndex);
}

void mouseReleased() {
  if(displayHelp){
    int clickedBin = (int) map(mouseX,0,width,0,fftLog.avgSize());
    spectrumClickRange[1] = clickedBin;

    // reset the range variable
    // make sure to keep the min-max correct
    int minVal = (int)min(spectrumClickRange);
    int maxVal = (int)max(spectrumClickRange);

    // also within bounds of the spectrum array
    minVal = max(0,minVal);
    maxVal = min(maxVal,bins);

    range[0] = minVal;
    range[1] = maxVal;

    println("spectrum range (bins): " + range[0] + " - " + range[1]);
  } 
  else {
    //cameraControlRelease();
  }
}

void mouseDragged() {
  if(!displayHelp){
    cameraControlDrag();
  }
}