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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
   
   




