PFont font;
int visMode = 1;

void setup() {
  size(500, 200);
  font = loadFont("Verdana-12.vlw");
}

void draw() {
  int t = ggt2(mouseX, mouseY);
  if (t == 0)
    return;
  if (visMode == 1)
      fliesen(mouseX, mouseY, t);
  else if (visMode == 2)
      balken(mouseX, mouseY, t);
  else
      schwingung(mouseX, mouseY, t);
}

void keyPressed() {
  switch(key) {
    case '1':
      visMode = 1;
      break;
    case '2':
      visMode = 2;
      break;
    case '3':
      visMode = 3;
  }
}