PhysicsProcessor ParentScene may be initialized to null

[manio143]

Release Type: GitHub

Version: master

Platform(s): N/A

Describe the bug

I'm not currently sure why or if always but on the below line the parentScene is not set, which results in later inability to display debug colliders in game.

stride/sources/engine/Stride.Physics/Engine/PhysicsProcessor.cs

Line 215 in 74b2b4a

parentScene = Services.GetSafeServiceAs<SceneSystem>()?.SceneInstance?.RootScene;

To Reproduce
Steps to reproduce the behavior:

1. Create a new project
2. Add a static collider to the ground
3. Add Debug physics shapes script
4. Launch game and press Ctrl+Shift+P

Expected behavior
Debug collider shapes are displayed.

Additional context
The issue can be easily mitigated by adding

SceneSystem.SceneInstance.GetProcessor<PhysicsProcessor>().ParentScene = Entity.Scene;

to the beginning of the debug script.

[kizilsum]

Hi! Is this still an issue? If so, I would like to take this one. @manio143 @Eideren

[Eideren]

@kizilsum Sure, go ahead !
Just to clarify, the help wanted message removed above is because anyone can now freely contribute to the engine. You can open PRs for any issue you want, right now the engine doesn't have a lot of traffic so you can just do so without notifying us first if you don't want to :)

[wrshield]

Hello, I'd like to try working on this issue and was wondering if anyone had some advice or ideas on where to start. Thanks!

[Doprez]

https://doc.stride3d.net/4.2/en/manual/engine/entity-component-system/index.html I assume this will be an issue within the Entity processor? I havent messed with Bullet too much but each of these physics shapes should be getting initialized in the EntityProcessor if it works like other systems.

I assume it should be around here where it gets set up.

[Eideren]

Fixed through #2262