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API > API/Runtime > API/Runtime/ClothingSystemRuntimeInterface > API/Runtime/ClothingSystemRuntimeInterface/IClothingSimulationInterface
Description
Called by the engine when external collisions are no longer necessary or when they need to be updated with some of the previous collisions removed. It is recommended in derived simulations to avoid freeing any allocations regarding external collisions as it is likely more will be added soon after this call
| Name | ClearExternalCollisions |
| Type | function |
| Header File | /Engine/Source/Runtime/ClothingSystemRuntimeInterface/Public/ClothingSimulationInterface.h |
| Include Path | #include "ClothingSimulationInterface.h" |
void ClearExternalCollisions()