void CalculateVertexROI ( const [FBrushStampData](API\Runtime\InteractiveToolsFramework\BaseTools\FBrushStampData) & Stamp, [TArray](API\Runtime\Core\Containers\TArray)< [VertexIndex](API\Plugins\MeshModelingToolsEditorOnlyExp\SkeletalMesh\VertexIndex) > & VertexIDs, [TArray](API\Runtime\Core\Containers\TArray)< float > & VertexFalloffs )