//! compute the first derivative in v direction of the
//! section for v = param
- //! Warning : It used only for C1 or C2 aproximation
+ //! Warning : It used only for C1 or C2 approximation
Standard_EXPORT virtual Standard_Boolean D1 (const Standard_Real Param, TColgp_Array1OfPnt& Poles, TColgp_Array1OfVec& DPoles, TColStd_Array1OfReal& Weigths, TColStd_Array1OfReal& DWeigths);
//! compute the second derivative in v direction of the
//! section for v = param
- //! Warning : It used only for C2 aproximation
+ //! Warning : It used only for C2 approximation
Standard_EXPORT virtual Standard_Boolean D2 (const Standard_Real Param, TColgp_Array1OfPnt& Poles, TColgp_Array1OfVec& DPoles, TColgp_Array1OfVec& D2Poles, TColStd_Array1OfReal& Weigths, TColStd_Array1OfReal& DWeigths, TColStd_Array1OfReal& D2Weigths);
//! give if possible an bspline Surface, like iso-v are the
//! surface.
Standard_EXPORT virtual void GetTolerance (const Standard_Real BoundTol, const Standard_Real SurfTol, const Standard_Real AngleTol, TColStd_Array1OfReal& Tol3d) const = 0;
- //! Is usefull, if (me) have to run numerical
+ //! Is useful, if (me) have to run numerical
//! algorithm to perform D0, D1 or D2
//! The default implementation make nothing.
Standard_EXPORT virtual void SetTolerance (const Standard_Real Tol3d, const Standard_Real Tol2d);
//! Get the barycentre of Surface.
- //! An very poor estimation is sufficent.
- //! This information is usefull to perform well
+ //! An very poor estimation is sufficient.
+ //! This information is useful to perform well
//! conditioned rational approximation.
//! Warning: Used only if <me> IsRational
Standard_EXPORT virtual gp_Pnt BarycentreOfSurf() const;
//! Returns the length of the greater section. This
- //! information is usefull to G1's control.
+ //! information is useful to G1's control.
//! Warning: With an little value, approximation can be slower.
Standard_EXPORT virtual Standard_Real MaximalSection() const = 0;
//! Compute the minimal value of weight for each poles
//! in all sections.
- //! This information is usefull to control error
+ //! This information is useful to control error
//! in rational approximation.
//! Warning: Used only if <me> IsRational
Standard_EXPORT virtual void GetMinimalWeight (TColStd_Array1OfReal& Weigths) const;