Physics simulation fixed time step and enhanced determinism settings, pull request

[0lento]

@B1TZ3R0;716615

I’ve implemented, the possibility to activate fixed delta time of Physics simulation directly in the project editor.

As shown in the picture above:

The Pull Request to this feature is: https://github.com/EpicGames/UnrealEngine/pull/3632/files

The code written is an extension of Snowcrash5 work Using a fixed physics timestep in Unreal Engine, free the physics approach - World Creation - Epic Developer Community Forums

I’ve also implemented the possibility to activate the enhanced determinism directly using the project settings.

Pull Request: https://github.com/EpicGames/UnrealEngine/pull/3633

I reviewed the code and it did have issues. I’ve solved those mentioned things in past on my UE4 fork (https://github.com/0lento/UnrealEngine/tree/4.15-FixedTimestep/Engine). The reason I never made a PR for it was that I wasn’t happy with some of the approaches there (they worked good enough for the test project but wouldn’t have been clean enough code for epics codebase IMO). Just implementing interpolation itself is a huge task. I know your PR didn’t do it but I feel like feat like this should implement it as it’s crucial part of the feature.