Networked Physics with PhysX

[Blue_man]

@B1TZ3R0;705902

Ye perfectly!! but I’ve some few questions

Do you create the scene manually (I mean you add each actor static body of world) or you use a function already present in the engine that allow you to initialize the scene with all static actors?

Do you manage the execution of secondary scene using immediate API to execute all replay move back?

When you have the corrected transformation you don’t instantly set it to the main scene but you pass it to your smoothing algorithm, ok but how it works? because if you put some interpolation force (even for few frames) the scene not become out of sync again?

There is a class in the engine that creates the scene in the constructor ( FPhysScene ) but you have to manually transfer actors between scenes, also another thing to note is that you have to create a new UWorld for the tracing so it can use the new physics scene. Also PxActor can only exist in one PxScene so you have to transfer all static object just before the correction happens and transfer them back before the next tick/substep is called. You have to do it before the next tick because ue4 does a check for each BodyInstance to see in which scene it exists, if it is not in the main scene ue4 will crash. Not sure if there is a way to copy PxActor so I can have an identical copy of it.

I manually call simulate on that scene, PxScene::simulate(float DeltaTime).

I am not adding force, I’m directly setting the transform and velocity. If update rate is at 30Hz there is enough time to smoothly perform the corrections. I’m allowing a small percentage of error.