OCCT

// Created on: 1997-08-22
// Created by: Jeannine PANCIATICI,  Sergey SOKOLOV
// Copyright (c) 1997-1999 Matra Datavision
// Copyright (c) 1999-2014 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 _Approx_CurvilinearParameter_HeaderFile
#define _Approx_CurvilinearParameter_HeaderFile

#include <Adaptor2d_Curve2d.hxx>
#include <Adaptor3d_Surface.hxx>
#include <GeomAbs_Shape.hxx>
#include <Standard_OStream.hxx>

//! Approximation of a Curve to make its parameter be its curvilinear abscissa.
//! If the curve is a curve on a surface S, C2D is the corresponding Pcurve,
//! we consider the curve is given by its representation
//! @code
//!   S(C2D(u))
//! @endcode
//! If the curve is a curve on 2 surfaces S1 and S2 and C2D1 C2D2 are the two corresponding Pcurve,
//! we consider the curve is given by its representation
//! @code
//!   1/2(S1(C2D1(u) + S2(C2D2(u)))
//! @endcode
class Approx_CurvilinearParameter
{
public:
  DEFINE_STANDARD_ALLOC

  //! case of a free 3D curve
  Standard_EXPORT Approx_CurvilinearParameter(const occ::handle<Adaptor3d_Curve>& C3D,
                                              const double                        Tol,
                                              const GeomAbs_Shape                 Order,
                                              const int                           MaxDegree,
                                              const int                           MaxSegments);

  //! case of a curve on one surface
  Standard_EXPORT Approx_CurvilinearParameter(const occ::handle<Adaptor2d_Curve2d>& C2D,
                                              const occ::handle<Adaptor3d_Surface>& Surf,
                                              const double                          Tol,
                                              const GeomAbs_Shape                   Order,
                                              const int                             MaxDegree,
                                              const int                             MaxSegments);

  //! case of a curve on two surfaces
  Standard_EXPORT Approx_CurvilinearParameter(const occ::handle<Adaptor2d_Curve2d>& C2D1,
                                              const occ::handle<Adaptor3d_Surface>& Surf1,
                                              const occ::handle<Adaptor2d_Curve2d>& C2D2,
                                              const occ::handle<Adaptor3d_Surface>& Surf2,
                                              const double                          Tol,
                                              const GeomAbs_Shape                   Order,
                                              const int                             MaxDegree,
                                              const int                             MaxSegments);

  Standard_EXPORT bool IsDone() const;

  Standard_EXPORT bool HasResult() const;

  //! returns the Bspline curve corresponding to the reparametrized 3D curve
  Standard_EXPORT occ::handle<Geom_BSplineCurve> Curve3d() const;

  //! returns the maximum error on the reparametrized 3D curve
  Standard_EXPORT double MaxError3d() const;

  //! returns the BsplineCurve representing the reparametrized 2D curve on the
  //! first surface (case of a curve on one or two surfaces)
  Standard_EXPORT occ::handle<Geom2d_BSplineCurve> Curve2d1() const;

  //! returns the maximum error on the first reparametrized 2D curve
  Standard_EXPORT double MaxError2d1() const;

  //! returns the BsplineCurve representing the reparametrized 2D curve on the
  //! second surface (case of a curve on two surfaces)
  Standard_EXPORT occ::handle<Geom2d_BSplineCurve> Curve2d2() const;

  //! returns the maximum error on the second reparametrized 2D curve
  Standard_EXPORT double MaxError2d2() const;

  //! print the maximum errors(s)
  Standard_EXPORT void Dump(Standard_OStream& o) const;

private:
  Standard_EXPORT static void ToleranceComputation(const occ::handle<Adaptor2d_Curve2d>& C2D,
                                                   const occ::handle<Adaptor3d_Surface>& S,
                                                   const int                             MaxNumber,
                                                   const double                          Tol,
                                                   double&                               TolV,
                                                   double&                               TolW);

private:
  int                              myCase;
  bool                             myDone;
  bool                             myHasResult;
  occ::handle<Geom_BSplineCurve>   myCurve3d;
  double                           myMaxError3d;
  occ::handle<Geom2d_BSplineCurve> myCurve2d1;
  double                           myMaxError2d1;
  occ::handle<Geom2d_BSplineCurve> myCurve2d2;
  double                           myMaxError2d2;
};

#endif // _Approx_CurvilinearParameter_HeaderFile