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D3DXConcatenateMeshes transform normal and tangent?

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The function D3DXConcatenateMeshes has parameter pGeomXForms, in sdk document, pGeomXForms: [optional] Each sub mesh is transformed by the corresponding matrix if this array is supplied. Now I dont know whether the vertex's normal and tangent are also transformed automatically by matrix pointed by pGeomXForms. Thank you. D3DXConcatenateMeshes( LPD3DXMESH *ppMeshes, UINT NumMeshes, DWORD Options, CONST D3DXMATRIX *pGeomXForms, CONST D3DXMATRIX *pTextureXForms, CONST D3DVERTEXELEMENT9 *pDecl, LPDIRECT3DDEVICE9 pD3DDevice, LPD3DXMESH *ppMeshOut);

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