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API > API/Runtime > API/Runtime/Chaos > API/Runtime/Chaos/IRewindCallback
Description
Called before each rewind step. This is to give user code the opportunity to trigger other code before each rewind step Usually to simulate external systems that ran in lock step with the physics sim
| Name | PreResimStep_Internal |
| Type | function |
| Header File | /Engine/Source/Runtime/Experimental/Chaos/Public/RewindData.h |
| Include Path | #include "RewindData.h" |
virtual void PreResimStep_Internal
(
int32 PhysicsStep,
bool bFirstStep
)