// Created by: Julia GERASIMOVA
// Copyright (c) 2015 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

#ifndef _BlendFunc_GenChamfer_HeaderFile
#define _BlendFunc_GenChamfer_HeaderFile

#include "Adaptor3d_Surface.hxx"
#include "Blend_Function.hxx"
#include "math_Vector.hxx"
#include "NCollection_Array1.hxx"
#include "GeomAbs_Shape.hxx"
#include "Standard_Integer.hxx"
#include "gp_Pnt.hxx"
#include "gp_Vec.hxx"
#include "gp_Pnt2d.hxx"
#include "gp_Vec2d.hxx"

class math_Matrix;
class gp_Lin;
class Blend_Point;

//! Deferred class for a function used to compute a general chamfer
class BlendFunc_GenChamfer : public Blend_Function
{
public:
  DEFINE_STANDARD_ALLOC

  Standard_EXPORT BlendFunc_GenChamfer(const occ::handle<Adaptor3d_Surface>& S1,
                                       const occ::handle<Adaptor3d_Surface>& S2,
                                       const occ::handle<Adaptor3d_Curve>&   CG);

  //! returns the number of equations of the function.
  Standard_EXPORT int NbEquations() const override;

  //! returns the values <F> of the functions and the derivatives
  //! <D> for the variable <X>.
  //! Returns True if the computation was done successfully,
  //! False otherwise.
  Standard_EXPORT bool Values(const math_Vector& X, math_Vector& F, math_Matrix& D) override;

  //! Sets the value of the parameter along the guide line.
  //! This determines the plane in which the solution has
  //! to be found.
  Standard_EXPORT void Set(const double Param) override = 0;

  //! Sets the bounds of the parametric interval on
  //! the guide line.
  //! This determines the derivatives in these values if the
  //! function is not Cn.
  Standard_EXPORT void Set(const double First, const double Last) override;

  Standard_EXPORT void GetTolerance(math_Vector& Tolerance, const double Tol) const override;

  Standard_EXPORT void GetBounds(math_Vector& InfBound, math_Vector& SupBound) const override;

  //! Returns the minimal Distance between two
  //! extremities of calculated sections.
  Standard_EXPORT double GetMinimalDistance() const override;

  //! Sets the distances and the "quadrant".
  Standard_EXPORT virtual void Set(const double Dist1, const double Dist2, const int Choix) = 0;

  //! Returns False
  Standard_EXPORT bool IsRational() const override;

  //! Compute the minimal value of weight for each poles
  //! of all sections.
  Standard_EXPORT void GetMinimalWeight(NCollection_Array1<double>& Weigths) const override;

  //! Returns the number of intervals for continuity
  //! <S>. May be one if Continuity(me) >= <S>
  Standard_EXPORT int NbIntervals(const GeomAbs_Shape S) const override;

  //! Stores in <T> the parameters bounding the intervals
  //! of continuity <S>.
  //!
  //! The array must provide enough room to accommodate
  //! for the parameters. i.e. T.Length() > NbIntervals()
  //! raises
  //! OutOfRange from Standard
  Standard_EXPORT void Intervals(NCollection_Array1<double>& T,
                                 const GeomAbs_Shape         S) const override;

  Standard_EXPORT void GetShape(int& NbPoles, int& NbKnots, int& Degree, int& NbPoles2d) override;

  //! Returns the tolerance to reach in approximation
  //! to respect
  //! BoundTol error at the Boundary
  //! AngleTol tangent error at the Boundary
  //! SurfTol error inside the surface.
  Standard_EXPORT void GetTolerance(const double BoundTol,
                                    const double SurfTol,
                                    const double AngleTol,
                                    math_Vector& Tol3d,
                                    math_Vector& Tol1D) const override;

  Standard_EXPORT void Knots(NCollection_Array1<double>& TKnots) override;

  Standard_EXPORT void Mults(NCollection_Array1<int>& TMults) override;

  //! Obsolete method
  Standard_EXPORT void Section(const double Param,
                               const double U1,
                               const double V1,
                               const double U2,
                               const double V2,
                               double&      Pdeb,
                               double&      Pfin,
                               gp_Lin&      C);

  //! Used for the first and last section
  Standard_EXPORT bool Section(const Blend_Point&            P,
                               NCollection_Array1<gp_Pnt>&   Poles,
                               NCollection_Array1<gp_Vec>&   DPoles,
                               NCollection_Array1<gp_Vec>&   D2Poles,
                               NCollection_Array1<gp_Pnt2d>& Poles2d,
                               NCollection_Array1<gp_Vec2d>& DPoles2d,
                               NCollection_Array1<gp_Vec2d>& D2Poles2d,
                               NCollection_Array1<double>&   Weigths,
                               NCollection_Array1<double>&   DWeigths,
                               NCollection_Array1<double>&   D2Weigths) override;

  //! Used for the first and last section
  Standard_EXPORT bool Section(const Blend_Point&            P,
                               NCollection_Array1<gp_Pnt>&   Poles,
                               NCollection_Array1<gp_Vec>&   DPoles,
                               NCollection_Array1<gp_Pnt2d>& Poles2d,
                               NCollection_Array1<gp_Vec2d>& DPoles2d,
                               NCollection_Array1<double>&   Weigths,
                               NCollection_Array1<double>&   DWeigths) override;

  Standard_EXPORT void Section(const Blend_Point&            P,
                               NCollection_Array1<gp_Pnt>&   Poles,
                               NCollection_Array1<gp_Pnt2d>& Poles2d,
                               NCollection_Array1<double>&   Weigths) override;

  Standard_EXPORT void Resolution(const int    IC2d,
                                  const double Tol,
                                  double&      TolU,
                                  double&      TolV) const override;

protected:
  occ::handle<Adaptor3d_Surface> surf1;
  occ::handle<Adaptor3d_Surface> surf2;
  occ::handle<Adaptor3d_Curve>   curv;
  int                            choix;
  double                         tol;
  double                         distmin;
};

#endif // _BlendFunc_GenChamfer_HeaderFile