[SOLVED] Issue with smooth game loop

Game Mechanics
#1

EDIT: Problem solved! Thanks so much to theagentd for helping me!

It’s been a while!

I’ve been dealing with a minor issue for a few days. I’d been having issues with consistency in screen scrolling and small screen tears, so I rewrote my game loop based on examples from ra4king and Eli. I’m still seeing small issues, though, and was wondering if I could have a few more pairs of eyes check it out.

Here’s a jar edit: updated to current version
Here’s the full source on BitBucket

Here’s the most relevant source

Game loop


@Override
	public void run() {
		createBufferStrategy(2);
		BufferStrategy bs = getBufferStrategy();

		init();

		while (running) {
			final double GAME_HERTZ = 60.0;
			final double TIME_BETWEEN_UPDATES = 1000000000 / GAME_HERTZ;
			final int MAX_UPDATES_BEFORE_RENDER = 1;
			double lastUpdateTime = System.nanoTime();
			double lastRenderTime = System.nanoTime();

			final double TARGET_FPS = 60;
			final double TARGET_TIME_BETWEEN_RENDERS = 1000000000 / TARGET_FPS;

			while (running) {
				double now = System.nanoTime();
				int updateCount = 0;

				if (!paused) {
					while (now - lastUpdateTime > TIME_BETWEEN_UPDATES && updateCount < MAX_UPDATES_BEFORE_RENDER) {
						tick();
						lastUpdateTime += TIME_BETWEEN_UPDATES;
						updateCount++;
					}

					render(bs);
					lastRenderTime = now;
					
					while (now - lastRenderTime < TARGET_TIME_BETWEEN_RENDERS && now - lastUpdateTime < TIME_BETWEEN_UPDATES) {
						Thread.yield();
						now = System.nanoTime();
					}
				}
			}
		}

		System.exit(0);
	}

Render function


private void render(BufferStrategy bs) {
		do {
			do {
				Graphics g = image.getGraphics();
				g.clearRect(0, 0, WIDTH, HEIGHT);

				game.draw(screen);

				g = bs.getDrawGraphics();
				g.drawImage(image, 0, 0, getWidth(), getHeight(), null);
				g.dispose();

			} while (bs.contentsRestored());

			bs.show();

		} while (bs.contentsLost());
	}

edit: added code tags

Thanks for taking the time to help me!

Nathan