virtual void CalcMorphTargetNormals ( int32 LOD, const [USkeletalMesh](API\Runtime\Engine\Engine\USkeletalMesh) * SkelMesh, int32 MorphTargetIndex, const [TArrayView](API\Runtime\Core\Containers\TArrayView)< const FVector3f > Deltas, const [TArrayView](API\Runtime\Core\Containers\TArrayView)< const FVector3f > BaseVertexPositions, const [TArrayView](API\Runtime\Core\Containers\TArrayView)< const FVector3f > BaseNormals, const [TArrayView](API\Runtime\Core\Containers\TArrayView)< const int32 > ImportedVertexToRenderVertexMapping, const [FColorVertexBuffer](API\Runtime\Engine\Rendering\FColorVertexBuffer) & ColorBuffer, [EMLDeformerMaskChannel](API\Plugins\MLDeformerFramework\EMLDeformerMaskChannel) MaskChannel, bool bInvertGlobalMaskChannel, [TArray](API\Runtime\Core\Containers\TArray)< FVector3f > & OutDeltaNormals )