Question RegisterPhysicsRuntimeSystemReadOnly clarifications

Hi

Can someone please explain how exactly this function works along with the write version?

How is this meant to be used when you have input and output dependencies inside the physics system group?

For example wait for the ExportPhysicsWorld to finish and before CopyPhysicsVelocityToSmoothing begins

 

If you look into RegisterPhysicsRuntimeSystemReadOnly it is just a singleton query.
So unity is just using the automatic dependency management.
If your system needs to read or write physics it is handled the same way as dependency sorting when multiple systems need to read/write the same component.

Using this...

Code (CSharp):

1. protected override void OnStartRunning()
2.     {
3.         this.RegisterPhysicsRuntimeSystemReadOnly();
4.     }

...

UpdateAfter(typeof(ExportPhysicsWorld))

and

UpdateBefore(typeof(CopyPhysicsVelocityToSmoothings))

should work in your case