Spine 4.3 limit animation FPS in multithreaded environment

linhan

Is there any way to lock down the animation frame rate when things are multithreaded by spine 4.3?

So the SkeletonAnimationFixedTimestep example only works on the main thread right now, which means we can't really limit the animation FPS in a multithreaded setup. Does the new version offer any solution for this?

Harald

@linhan I'm afraid to say that this is not as easy and cleanly possible currently with threading enabled.

What is basically required is:

Set updateMode to UpdateMode.Nothing on frames without a fixed-timestep update.
Restore the previous updateMode on update frames.
Use a cumulated delta time (frames * frameDeltaTime) at the threaded animation update.
Clear requiresMeshBufferAssignmentMainThread when worker mesh generation is skipped.

While the first two items can be set more easily from an external component, items 3 and 4 require at least a subclass of SkeletonRenderer and SkeletonAnimation, which is somewhat of an unclean solution especially just for resetting requiresMeshBufferAssignmentMainThread.

We will have a look at how we can improve the situation to allow for easier threaded update-skipping. We will get back to you once we have a solution to offer.