Pyglet window contents flickering badly

[Mike Finister]

Trying to use Pyglet as a UI framework for an app I’m working on.  Already got Pygame working as a lightweight UI front end that takes all the co-ordinate, rotation data from my games engine.

Tried Pyglet and got sprites to show on screen but when using a batch to draw the contents flickers a lot and I mean a lot

Tried to set the background to be white using the .gl package but this meant it was flickering between black and white and I cannot see why.

The UI as I said is lightweight only and wanted to try Pyglet because smoother graphics then Pygame when it comes to rotating sprites

So looking for pointers - I’m subclassing Window, scheduling the update and drawing in on_draw with a self.clear first because I cannot see how to only clear the space of the sprite as Pygame does.

Any help very much appreciated 

[Charles M]

Can you post a simple example showing the issue? 

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[Mike Finister]

I've attached two video captures - first shows using Pygame as UI - second is Pyglet - basically got to creating and adding sprites to a batch and using the batch.draw method.

Can't understand why there is any flickering at all aside from having to use self.clear() to clear the window's contents - but still would have expected it to be smoother

Links to videos here (hope it works - don't use Google drive much anymore)

https://drive.google.com/open?id=1mDGoh6aec4nUcbgVJKDzEwJ0BwZckHxy

https://drive.google.com/open?id=1r7LRp_Nwl4KzgQyQqNtJHXDFPRkSAIge

On Thursday, 30 April 2020 21:28:16 UTC+1, Charles M wrote:

Can you post a simple example showing the issue? 

On Thu, Apr 30, 2020, 3:14 PM 'Mike Finister' via pyglet-users <pyglet...@googlegroups.com> wrote:

Trying to use Pyglet as a UI framework for an app I’m working on.  Already got Pygame working as a lightweight UI front end that takes all the co-ordinate, rotation data from my games engine.

Tried Pyglet and got sprites to show on screen but when using a batch to draw the contents flickers a lot and I mean a lot

Tried to set the background to be white using the .gl package but this meant it was flickering between black and white and I cannot see why.

The UI as I said is lightweight only and wanted to try Pyglet because smoother graphics then Pygame when it comes to rotating sprites

So looking for pointers - I’m subclassing Window, scheduling the update and drawing in on_draw with a self.clear first because I cannot see how to only clear the space of the sprite as Pygame does.

Any help very much appreciated 

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[Charles M]

Sorry, I should have been more specific. Can you post the code to cause this behavior? 

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