// Created on: 1992-04-13
// 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_Quadric_HeaderFile
#define _IntSurf_Quadric_HeaderFile

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

#include "gp_Ax3.hxx"
#include "gp_Lin.hxx"
#include "GeomAbs_SurfaceType.hxx"
#include "gp_Pln.hxx"
#include "gp_Sphere.hxx"
#include "gp_Cylinder.hxx"
#include "gp_Cone.hxx"
#include "gp_Torus.hxx"
#include "Standard_Integer.hxx"
class gp_Pln;
class gp_Cylinder;
class gp_Sphere;
class gp_Cone;
class gp_Torus;
class gp_Pnt;
class gp_Vec;

class IntSurf_Quadric
{
public:
  DEFINE_STANDARD_ALLOC

  Standard_EXPORT IntSurf_Quadric();

  Standard_EXPORT IntSurf_Quadric(const gp_Pln& P);

  Standard_EXPORT IntSurf_Quadric(const gp_Cylinder& C);

  Standard_EXPORT IntSurf_Quadric(const gp_Sphere& S);

  Standard_EXPORT IntSurf_Quadric(const gp_Cone& C);

  Standard_EXPORT IntSurf_Quadric(const gp_Torus& T);

  Standard_EXPORT void SetValue(const gp_Pln& P);

  Standard_EXPORT void SetValue(const gp_Cylinder& C);

  Standard_EXPORT void SetValue(const gp_Sphere& S);

  Standard_EXPORT void SetValue(const gp_Cone& C);

  Standard_EXPORT void SetValue(const gp_Torus& T);

  Standard_EXPORT double Distance(const gp_Pnt& P) const;

  Standard_EXPORT gp_Vec Gradient(const gp_Pnt& P) const;

  Standard_EXPORT void ValAndGrad(const gp_Pnt& P, double& Dist, gp_Vec& Grad) const;

  GeomAbs_SurfaceType TypeQuadric() const;

  gp_Pln Plane() const;

  gp_Sphere Sphere() const;

  gp_Cylinder Cylinder() const;

  gp_Cone Cone() const;

  gp_Torus Torus() const;

  Standard_EXPORT gp_Pnt Value(const double U, const double V) const;

  Standard_EXPORT void D1(const double U,
                          const double V,
                          gp_Pnt&      P,
                          gp_Vec&      D1U,
                          gp_Vec&      D1V) const;

  Standard_EXPORT gp_Vec DN(const double U, const double V, const int Nu, const int Nv) const;

  Standard_EXPORT gp_Vec Normale(const double U, const double V) const;

  Standard_EXPORT void Parameters(const gp_Pnt& P, double& U, double& V) const;

  Standard_EXPORT gp_Vec Normale(const gp_Pnt& P) const;

private:
  gp_Ax3              ax3;
  gp_Lin              lin;
  GeomAbs_SurfaceType typ;
  double              prm1;
  double              prm2;
  double              prm3;
  double              prm4;
  bool                ax3direc;
};

#include "IntSurf_Quadric.lxx"

#endif // _IntSurf_Quadric_HeaderFile