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API > API/Runtime > API/Runtime/Chaos > API/Runtime/Chaos/FRigidClustering
Description
UnionClusterGroups Clusters that share a group index should be unioned into a single cluster prior to simulation. The GroupIndex should be set on creation, and never touched by the client again.
| Name | UnionClusterGroups |
| Type | function |
| Header File | /Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/PBDRigidClustering.h |
| Include Path | #include "Chaos/PBDRigidClustering.h" |
| Source | /Engine/Source/Runtime/Experimental/Chaos/Private/Chaos/PBDRigidClustering.cpp |
void UnionClusterGroups()