API Reference > OdDg Classes > OdDgBSplineSurface Class > OdDgBSplineSurface Methods > OdDgBSplineSurface::getNormal Method
OdDgBSplineSurface::getNormal Method
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Syntax
C++
OdResult getNormal(double dU, double dV, OdGeVector3d& normal) const;
Parameters
Parameters 
Description 
double dU 
[in] u parameter.  
double dV 
[in] v parameter.  
OdGeVector3d& normal 
[out] A passed-in parameter for returning the normal vector.
 
Returns

Returns eOk if successful. If the surface doesn't contain any NURBS information, returns eFail. If the dU or dV values are invalid, returns eOutOfRange.

Description

Returns the normal vector at the specified parameter location ([u, v]). 

 

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