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A3DSurfEvaluateNormal
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.. c:function:: A3DStatus A3DSurfEvaluateNormal(const A3DSurfBase *pSurf, const A3DVector2dData *pUVParameter, A3DVector3dData *pNormal)

   .. rst-class:: sig-pretty-signature
   
      | :c:enum:`~A3DStatus` A3DSurfEvaluateNormal(*const* :c:type:`~A3DSurfBase`\ * **pSurf**\ , *const* :c:struct:`~A3DVector2dData`\ * **pUVParameter**\ , :c:struct:`~A3DVector3dData`\ * **pNormal**\ )
   
   Function to evaluate a normal on a surface. 
   
   **Parameters**
   
   
      **pSurf**\ : The input surface. 
   
      **pUVParameter**\ : The input UV point to evaluate the normal of the surface. 
   
      **pNormal**\ : The normal of the surface at the UV parameter. 
   
   
   **Returns**
   
   
      ``A3D_SUCCESS`` on success, or an error code on failure
   
   




