public void processInput() {
		if (Keyboard.isKeyDown(Keyboard.KEY_UP)) {
			schlange.setDirection(SchlangenKopf.DIRECTION_UP);
		} else if (Keyboard.isKeyDown(Keyboard.KEY_DOWN)) {
			schlange.setDirection(SchlangenKopf.DIRECTION_DOWN);
		} else if (Keyboard.isKeyDown(Keyboard.KEY_RIGHT)) {
			schlange.setDirection(SchlangenKopf.DIRECTION_RIGHT);
		} else if (Keyboard.isKeyDown(Keyboard.KEY_LEFT)) {
			schlange.setDirection(SchlangenKopf.DIRECTION_LEFT);
		}
	}