// Created on: 1995-06-06
// Created by: Jean Yves LEBEY
// Copyright (c) 1995-1999 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 _BRepApprox_ThePrmPrmSvSurfacesOfApprox_HeaderFile
#define _BRepApprox_ThePrmPrmSvSurfacesOfApprox_HeaderFile

#include <Standard.hxx>
#include <Standard_DefineAlloc.hxx>
#include <Standard_Handle.hxx>

#include <gp_Pnt2d.hxx>
#include <gp_Pnt.hxx>
#include <gp_Vec2d.hxx>
#include <gp_Vec.hxx>
#include <Standard_Boolean.hxx>
#include <BRepApprox_TheInt2SOfThePrmPrmSvSurfacesOfApprox.hxx>
#include <ApproxInt_SvSurfaces.hxx>
class BRepAdaptor_Surface;
class BRepApprox_SurfaceTool;
class BRepApprox_ApproxLine;
class BRepApprox_TheInt2SOfThePrmPrmSvSurfacesOfApprox;
class BRepApprox_TheFunctionOfTheInt2SOfThePrmPrmSvSurfacesOfApprox;
class gp_Pnt;
class gp_Vec;
class gp_Vec2d;

class BRepApprox_ThePrmPrmSvSurfacesOfApprox : public ApproxInt_SvSurfaces
{
public:
  DEFINE_STANDARD_ALLOC

  Standard_EXPORT BRepApprox_ThePrmPrmSvSurfacesOfApprox(const BRepAdaptor_Surface& Surf1,
                                                         const BRepAdaptor_Surface& Surf2);

  //! returns True if Tg,Tguv1 Tguv2 can be computed.
  Standard_EXPORT Standard_Boolean Compute(Standard_Real& u1,
                                           Standard_Real& v1,
                                           Standard_Real& u2,
                                           Standard_Real& v2,
                                           gp_Pnt&        Pt,
                                           gp_Vec&        Tg,
                                           gp_Vec2d&      Tguv1,
                                           gp_Vec2d&      Tguv2);

  Standard_EXPORT void Pnt(const Standard_Real u1,
                           const Standard_Real v1,
                           const Standard_Real u2,
                           const Standard_Real v2,
                           gp_Pnt&             P);

  Standard_EXPORT Standard_Boolean SeekPoint(const Standard_Real u1,
                                             const Standard_Real v1,
                                             const Standard_Real u2,
                                             const Standard_Real v2,
                                             IntSurf_PntOn2S&    Point);

  Standard_EXPORT Standard_Boolean Tangency(const Standard_Real u1,
                                            const Standard_Real v1,
                                            const Standard_Real u2,
                                            const Standard_Real v2,
                                            gp_Vec&             Tg);

  Standard_EXPORT Standard_Boolean TangencyOnSurf1(const Standard_Real u1,
                                                   const Standard_Real v1,
                                                   const Standard_Real u2,
                                                   const Standard_Real v2,
                                                   gp_Vec2d&           Tg);

  Standard_EXPORT Standard_Boolean TangencyOnSurf2(const Standard_Real u1,
                                                   const Standard_Real v1,
                                                   const Standard_Real u2,
                                                   const Standard_Real v2,
                                                   gp_Vec2d&           Tg);

protected:
private:
  gp_Pnt2d                                         MyParOnS1;
  gp_Pnt2d                                         MyParOnS2;
  gp_Pnt                                           MyPnt;
  gp_Vec2d                                         MyTguv1;
  gp_Vec2d                                         MyTguv2;
  gp_Vec                                           MyTg;
  Standard_Boolean                                 MyIsTangent;
  Standard_Boolean                                 MyHasBeenComputed;
  gp_Pnt2d                                         MyParOnS1bis;
  gp_Pnt2d                                         MyParOnS2bis;
  gp_Pnt                                           MyPntbis;
  gp_Vec2d                                         MyTguv1bis;
  gp_Vec2d                                         MyTguv2bis;
  gp_Vec                                           MyTgbis;
  Standard_Boolean                                 MyIsTangentbis;
  Standard_Boolean                                 MyHasBeenComputedbis;
  BRepApprox_TheInt2SOfThePrmPrmSvSurfacesOfApprox MyIntersectionOn2S;
};

#endif // _BRepApprox_ThePrmPrmSvSurfacesOfApprox_HeaderFile
