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API > API/Runtime > API/Runtime/Chaos > API/Runtime/Chaos/FImplicitBVHObject
Description
The index of our most distant ancestor. I.e., the index in the root Union. This is used to map each object to a ShapeInstance.
| Name | GetRootObjectIndex |
| Type | function |
| Header File | /Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/ImplicitObjectBVH.h |
| Include Path | #include "Chaos/ImplicitObjectBVH.h" |
int32 GetRootObjectIndex() const