OdGeSurface::evalPoint Method (OdGePoint2d&, int, OdGeVector3dArray&, OdGeVector3d&)

Syntax

C++

OdGePoint3d evalPoint(const OdGePoint2d& param, int numDeriv, OdGeVector3dArray& derivatives, OdGeVector3d& normal) const;

Parameters	Description
const OdGePoint2d& param	[in] The parameter pair to be evaluated.
int numDeriv	[in] The number of derivatives to be computed.
OdGeVector3dArray& derivatives	[out] Receives an array of derivatives at the point corresponding to param.
OdGeVector3d& normal	[out] Receives the normal at the point corresponding to param.

Returns the point corresponding to the parameter pair, as well as the derivatives and the normal at that point.

Derivatives are ordered as follows: du, dv, dudu, dvdv, dudv

By default this function throws exception "not Implemented". Should be implemented in derived classes.