boolean lit = true;
boolean filled = true;
boolean skeleton = true;
float theta = 0.0;
int res = 25;

void setup() {
  size(800, 800, P3D);  // need 3D render
}

void draw() {
  background(202);
  
  theta += 0.005;

  if (lit) {
    lights();
  } else {
    noLights();
  }

  if (filled) {
    fill(255);
  } else {
    noFill();
  }
  
  if (skeleton) {
    stroke(0);
  } else {
    noStroke();
  }

  translate(0.5*width, 0.5*height);
  rotateY(theta);
  sphere(0.375*width);
}

void keyPressed() {
  if (key == 'f') {
    filled = !filled;
  } else if (key == 'l') {
    lit = !lit;
  } else if (key == 's') {
    skeleton = !skeleton;
  } else if (key == CODED) {
    if (keyCode == UP) {
      res += 2;
    } else if (keyCode == DOWN && res >= 5) {
      res -= 2;
    }
    sphereDetail(res);
  }
}