// slides ----------------------------------------------------------------------

int slide;
int slidenum = 2;


void slides(int _slide) {

  switch (_slide) {
  
    case 0:
      println("slide " + _slide);
      //
      rxnum = TWO_PI/36 * 6;
      rznum = TWO_PI/36 * 4;
      nmznum = -100;      
      //
      mode = 1;        
      fmode = 1; 
      colormode = 2;
      res = 10;
      dnum = 1;
      //
      autorotate = false;		
      showimage = true;  
      showbgimage = false;       
      showstage = true;       
      //showdisplay = false;	
      showfilter = false;		
      showmarker = false;    
      showoutline = false;   
      showfrequencies = true;
      //
      break;
      
    case 1:
      println("slide " + _slide);
      //
      rxnum = TWO_PI/36 * 10;
      rznum = 0;
      nmznum = 400;
      //
      nmx = width/2;
      nmy = 500;    
      //
      mode = 2;        
      fmode = 1; 
      colormode = 1;
      res = 5;
      dnum = 1;
      //
      autorotate = false;		
      showimage = false;  
      showbgimage = false;       
      showstage = false;       
      //showdisplay = true;	
      showfilter = false;		
      showmarker = false;    
      showoutline = false;   
      showfrequencies = true;
      //
      break;
      
    case 2:
      println("slide " + _slide);
      //
      rxnum = 0;
      rznum = 0;
      nmznum = 200;
      //
      nmx = width/2;
      nmy = height/2;    
      //
      mode = 2;        
      fmode = 1; 
      colormode = 1;
      res = 10;
      dnum = 1;
      //
      autorotate = false;		
      showimage = false;  
      showbgimage = false;       
      showstage = false;       
      //showdisplay = true;	
      showfilter = false;		
      showmarker = false;    
      showoutline = false;   
      showfrequencies = true;
      //
      break;

  
  }
}


// keyboard --------------------------------------------------------------------

void keyPressed() {
  
  switch (keyCode) {
    
    // rotation
    case UP: rxnum += TWO_PI/36; break;
    case DOWN: rxnum -= TWO_PI/36; break;
    case RIGHT: rznum -= TWO_PI/36; break;
    case LEFT: rznum += TWO_PI/36; break;
    
    // filter
    case ALT: showfilter = !showfilter; break;
      
    case 34: showfilter = true; if (offnum > 0) { offnum -= 5; } break;
    case 33: showfilter = true; if (offnum < 255 / 6 * 5) { offnum += 5; } break;
    
    // frequencies (F1)
    case 112: fmode = 1; break;
    
    // frequencies (F2)
    case 113: fmode = 2; break;
    
    // frequencies (F3)
    case 114: fmode = 3; break;
    
     // frequencies (F4)
    case 115: fmode = 4; break;
    
    // threshold
    case 36: threshold += 1; break;
    case 35: if (threshold > 0) { threshold -= 1; } break; 
    
        
    case 16: offset += 10; break;
    case 17: if (offset > 0) { offset -= 10; } break;
    
  }
  

  switch (key) {
    
    // slideshow controls
    case '\n': 
      if (slide < slidenum) { 
        slide += 1; 
      } else {
        slide = 0;
      }
      slides(slide);
      break;
    
    // visualisations
    case '1': mode = 1; break;
    case '2': mode = 2; break;
    case '3': mode = 3; break;
    case '4': mode = 4; break;
    case '5': mode = 5; break;
    case '6': mode = 6; break;
    case '7': mode = 7; break;
    case '8': mode = 8; break;
    case '9': mode = 9; break;

    // adjust resolution
    case '+': if (res > 1) { res -= 1; }
      println("resolution:\t" + res);
      break;

    case '-': if (res < 30) { res += 1; };
      println("resolution:\t" + res);
      break;
    
    case 'c': 
      if (colormode < 3) { 
        colormode += 1; 
      } else {
        colormode = 1;
      };
      println("colormode:\t" + colormode);
      break;
    
    // save Frame
    case 's': saveFrame(); break;
    
    // zoom in
    case '.': nmznum += 40; break;
    
    // zoom out
    case ',': nmznum -= 40; break;

    // amplitude
    case 'x': dnum += .2; break;
    case 'y': dnum -= .2; break;

    // autorotate
    case 'r': autorotate = !autorotate; break;

    // show / hide vimage
    case 'i': showimage = !showimage; break;
    
    // show / hide background vimage
    case 'w': showbgimage = !showbgimage; break;
    
    // show / hide frequencies
    case 'f': showfrequencies = !showfrequencies; break;
    
    // show / hide db markers   
    case 'm': showmarker = !showmarker; break;

    // change frequency (space)
    case ' ': if (count < img_num-1) { count += 1; } else { count = 0; }
      println("image:"  + count);
      break;

    // show / hide stage
    case 'b': showstage = !showstage; break;

    // show / hide display
    case 'd': showdisplay = !showdisplay; break;

    case 'k': showshortcuts = !showshortcuts;
  }

}