Pyglet flickering when rendering many objects

[obiwac]

Title; when rendering many objects, Pyglet flickers for some reason. A call to glFinish at the end of the draw function helps, although it doesn't fix the flickering completely (I suspect it just makes it better as it adds a bit of delay in the drawing process).

[abhra2020-smart]

Try lowering the FPS to something like 30. You won't see the difference. It will look like 60 FPS.

[obiwac]

You certainly will see the difference.

And that doesn't exactly solve the underlying issue 😛

[abhra2020-smart]

Ok, you might wanna add chunk loading and unloading.

Check if the camera can see the chunk, if not, hide it,
Similar to what you did to the blocks in ep. 10

EDIT: Sorry for late reply

[obiwac]

You mean frustum culling?

Yeah, I will end up making a video on optimizations like that.

Still though, that doesn't solve the underlying issue. I'd like to know exactly why it's flickering, it's not enough to just work around it 😄

To fix this issue, you can try to make it so that pyglet renders fewer objects. You can try to do this by rendering fewer vertices per block like only rendering vertices that the player can see and when a block is broken, then update vertices for the blocks around the block broken.

[obiwac]

That's already what I'm doing and that doesn't solve the underlying issue

I think I have a solution for the problem. In main.py, change pyglet.clock.schedule_interval(self.update, 1.0 / 10000) to pyglet.clock.schedule(update)

[drakeerv]

That only seems to be an issue on linux.

[obiwac]

FreeBSD exhibits the same behaviour. Perhaps a bug in NVIDIA's Unix drivers? Although I will say I've already had people say they experience this issue on Windows too so not entirely sure.

[drakeerv]

Could possibly be Nvidia drivers then.

[Jukitsu]

My guess is that the framebuffer somehow doesn't clean up properly or buffers doesn't swap correctly. You could try glFlush(), glFinish() or set vsync to true

[Jukitsu]

I will think its rather because buffer swapping is broken.