API Reference > OdGe Classes > OdGeNurbSurface Class > OdGeNurbSurface Methods > OdGeNurbSurface::getDerivativesAt Method
OdGeNurbSurface::getDerivativesAt Method
Syntax
C++
bool getDerivativesAt(const OdGePoint2d& param, OdUInt32 numDeriv, VectorDerivArray derivatives) const;
Parameters 
Description 
const OdGePoint2d& param 
[in] Parameter to be evaluated.  
OdUInt32 numDeriv 
[in] Number of derivatives to be computed.  
VectorDerivArray derivatives 
[out] Receives an array of derivatives at the point corresponding to param. 

true if and only if derivatives were calculated successfully.

Retrieves the derivatives at the point specified by param. 

 

Not implemented. For third-party use only.

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