Standard_EXPORT Extrema_ExtPC2d();
+ //! It calculates all the distances.
+ //! The function F(u)=distance(P,C(u)) has an extremum
+ //! when g(u)=dF/du=0. The algorithm searchs all the
+ //! zeros inside the definition range of the curve.
+ //! Zeros are searched between uinf and usup.
+ //! Tol is used to decide to stop the
+ //! iterations according to the following condition:
+ //! if n is the number of iterations,
+ //! the algorithm stops when abs(F(Un)-F(Un-1)) < Tol.
Standard_EXPORT Extrema_ExtPC2d(const gp_Pnt2d& P, const Adaptor2d_Curve2d& C, const Standard_Real Uinf, const Standard_Real Usup, const Standard_Real TolF = 1.0e-10);
+ //! It calculates all the distances.
+ //! The function F(u)=distance(P,C(u)) has an extremum
+ //! when g(u)=dF/du=0. The algorithm searchs all the
+ //! zeros inside the definition range of the curve.
+ //! Tol is used to decide to stop the
+ //! iterations according to the following condition:
+ //! if n is the number of iterations,
+ //! the algorithm stops when abs(F(Un)-F(Un-1)) < Tol.
Standard_EXPORT Extrema_ExtPC2d(const gp_Pnt2d& P, const Adaptor2d_Curve2d& C, const Standard_Real TolF = 1.0e-10);
+ //! initializes the fields of the algorithm.
Standard_EXPORT void Initialize (const Adaptor2d_Curve2d& C, const Standard_Real Uinf, const Standard_Real Usup, const Standard_Real TolF = 1.0e-10);
+ //! An exception is raised if the fields have not been
+ //! initialized.
Standard_EXPORT void Perform (const gp_Pnt2d& P);
+ //! True if the distances are found.
Standard_EXPORT Standard_Boolean IsDone() const;
+ //! Returns the value of the <N>th extremum square distance.
Standard_EXPORT Standard_Real SquareDistance (const Standard_Integer N) const;
+ //! Returns the number of extremum distances.
Standard_EXPORT Standard_Integer NbExt() const;
+ //! Returns True if the <N>th extremum distance is a
+ //! minimum.
Standard_EXPORT Standard_Boolean IsMin (const Standard_Integer N) const;
+ //! Returns the point of the <N>th extremum distance.
Standard_EXPORT const Extrema_POnCurv2d& Point (const Standard_Integer N) const;
+ //! if the curve is a trimmed curve,
+ //! dist1 is a square distance between <P> and the point
+ //! of parameter FirstParameter <P1> and
+ //! dist2 is a square distance between <P> and the point
+ //! of parameter LastParameter <P2>.
Standard_EXPORT void TrimmedSquareDistances (Standard_Real& dist1, Standard_Real& dist2, gp_Pnt2d& P1, gp_Pnt2d& P2) const;