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UpdateTangents

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		Name	Description
	void	UpdateTangents ( const FMeshTangentsf* External..., bool bFastUpdateIfPossible )	Copy externally-calculated tangents into the internal tangets buffer.
	void	UpdateTangents ( const FMeshTangentsd* External..., bool bFastUpdateIfPossible )	Copy externally-calculated tangents into the internal tangets buffer.

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