private void initDisplay() {
		log.info("Initializing screen subsystem...");
		try {
			Display.setDisplayMode(new DisplayMode(x_res, y_res));
			Display.create();
			log.info("Screen initialized.");
		} catch (LWJGLException e) {
			log.error("Caught exception. Info: " + e.getMessage());
			e.printStackTrace();
			System.exit(1);
		}
	}