@Override
 public void render(GameContainer container, Graphics g) throws SlickException {
   // throw new UnsupportedOperationException("Not supported yet.");
   // g.drawString("Hello World", 100, 100);
   land.draw(0, 0);
   plane1.draw(
       (float) jugador1.getPosicion().getX(), (float) jugador1.getPosicion().getY(), 0.75f);
   plane2.draw(
       (float) jugador2.getPosicion().getX(), (float) jugador2.getPosicion().getY(), 0.75f);
 }
  @Override
  public void update(GameContainer container, int delta) throws SlickException {
    // throw new UnsupportedOperationException("Not supported yet.");
    Input input = container.getInput();

    // rotate quad
    double x1 = jugador1.getPosicion().getX();
    double y1 = jugador1.getPosicion().getY();

    if (Keyboard.isKeyDown(Keyboard.KEY_LEFT)) {
      plane1.rotate(-0.2f * delta);
    }
    if (Keyboard.isKeyDown(Keyboard.KEY_RIGHT)) {
      plane1.rotate(0.2f * delta);
    }

    if (Keyboard.isKeyDown(Keyboard.KEY_DOWN)) {
      float hip = 0.4f * delta;
      float rotation = plane1.getRotation();
      x1 -= hip * Math.sin(Math.toRadians(rotation));
      y1 += hip * Math.cos(Math.toRadians(rotation));
    }
    if (Keyboard.isKeyDown(Keyboard.KEY_UP)) {
      float hip = 0.4f * delta;
      float rotation = plane1.getRotation();
      x1 += hip * Math.sin(Math.toRadians(rotation));
      y1 -= hip * Math.cos(Math.toRadians(rotation));
    }

    // keep quad on the screen
    if (x1 < 10) {
      x1 = 10;
    }
    if (x1 > 790) {
      x1 = 790;
    }
    if (y1 < 10) {
      y1 = 10;
    }
    if (y1 > 590) {
      y1 = 590;
    }

    Vector posicion = jugador1.getPosicion();
    posicion.setX(x1);
    posicion.setY(y1);
    jugador1.setPosicion(posicion);

    // jugador 2
    if (Keyboard.isKeyDown(Keyboard.KEY_W)) lastSteering = 1;
    if (Keyboard.isKeyDown(Keyboard.KEY_A)) lastSteering = 2;
    if (Keyboard.isKeyDown(Keyboard.KEY_F)) lastSteering = 3;
    if (Keyboard.isKeyDown(Keyboard.KEY_S)) lastSteering = 4;
    /*
    switch(lastSteering) {
        case 1: jugador2.update(steeringW.getSteering(), delta);
            break;
        case 2: jugador2.update(steeringA.getSteering(), delta);
            break;
        case 3: jugador2.update(steeringF.getSteering(), delta);
            break;
        case 4: jugador2.update(steeringS.getSteering(), delta);
            break;
        default:
    }*/

    // plane2.rotate((float) jugador2.getOrientacion());

    if (input.isKeyPressed(Input.KEY_F1)) {
      Image target = new Image(container.getWidth(), container.getHeight());
      container.getGraphics().copyArea(target, 0, 0);
      ImageOut.write(target.getFlippedCopy(false, true), "screenshot.png", false);
      target.destroy();
    }
  }