// Created on: 1992-05-15
// Created by: Jacques GOUSSARD
// Copyright (c) 1992-1999 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 _IntSurf_InteriorPoint_HeaderFile
#define _IntSurf_InteriorPoint_HeaderFile

#include "Standard.hxx"
#include "Standard_DefineAlloc.hxx"

#include "gp_Pnt.hxx"
#include "gp_Vec.hxx"
#include "gp_Vec2d.hxx"

//! Definition of a point solution of the
//! intersection between an implicit an a
//! parametrised surface. These points are
//! passing points on the intersection lines,
//! or starting points for the closed lines
//! on the parametrised surface.
class IntSurf_InteriorPoint
{
public:
  DEFINE_STANDARD_ALLOC

  Standard_EXPORT IntSurf_InteriorPoint();

  Standard_EXPORT IntSurf_InteriorPoint(const gp_Pnt&   P,
                                        const double    U,
                                        const double    V,
                                        const gp_Vec&   Direc,
                                        const gp_Vec2d& Direc2d);

  Standard_EXPORT void SetValue(const gp_Pnt&   P,
                                const double    U,
                                const double    V,
                                const gp_Vec&   Direc,
                                const gp_Vec2d& Direc2d);

  //! Returns the 3d coordinates of the interior point.
  const gp_Pnt& Value() const;

  //! Returns the parameters of the interior point on the
  //! parametric surface.
  void Parameters(double& U, double& V) const;

  //! Returns the first parameter of the interior point on the
  //! parametric surface.
  double UParameter() const;

  //! Returns the second parameter of the interior point on the
  //! parametric surface.
  double VParameter() const;

  //! Returns the tangent at the intersection in 3d space
  //! associated to the interior point.
  const gp_Vec& Direction() const;

  //! Returns the tangent at the intersection in the parametric
  //! space of the parametric surface.
  const gp_Vec2d& Direction2d() const;

private:
  gp_Pnt   point;
  double   paramu;
  double   paramv;
  gp_Vec   direc;
  gp_Vec2d direc2d;
};

#include "IntSurf_InteriorPoint.lxx"

#endif // _IntSurf_InteriorPoint_HeaderFile