// Created on: 1992-07-01
// Created by: Laurent BUCHARD
// 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 _IntAna_Quadric_HeaderFile
#define _IntAna_Quadric_HeaderFile

#include <Standard_DefineAlloc.hxx>
#include <NCollection_List.hxx>

//! This class provides a description of Quadrics by their
//! Coefficients in natural coordinate system.
class IntAna_Quadric 
{
public:

  DEFINE_STANDARD_ALLOC

  
  //! Empty Constructor
  Standard_EXPORT IntAna_Quadric();
  
  //! Creates a Quadric from a Pln
  Standard_EXPORT IntAna_Quadric(const gp_Pln& P);
  
  //! Creates a Quadric from a Sphere
  Standard_EXPORT IntAna_Quadric(const gp_Sphere& Sph);
  
  //! Creates a Quadric from a Cylinder
  Standard_EXPORT IntAna_Quadric(const gp_Cylinder& Cyl);
  
  //! Creates a Quadric from a Cone
  Standard_EXPORT IntAna_Quadric(const gp_Cone& Cone);
  
  //! Initializes the quadric with a Pln
  Standard_EXPORT void SetQuadric (const gp_Pln& P);
  
  //! Initialize the quadric with a Sphere
  Standard_EXPORT void SetQuadric (const gp_Sphere& Sph);
  
  //! Initializes the quadric with a Cone
  Standard_EXPORT void SetQuadric (const gp_Cone& Con);
  
  //! Initializes the quadric with a Cylinder
  Standard_EXPORT void SetQuadric (const gp_Cylinder& Cyl);
  
  //! Returns the coefficients of the polynomial equation
  //! which define the quadric:
  //! xCXX x**2 + xCYY y**2 + xCZZ z**2
  //! + 2 ( xCXY x y  + xCXZ x z  + xCYZ y z  )
  //! + 2 ( xCX x + xCY y + xCZ z )
  //! + xCCte
  Standard_EXPORT void Coefficients (Standard_Real& xCXX, Standard_Real& xCYY, Standard_Real& xCZZ, Standard_Real& xCXY, Standard_Real& xCXZ, Standard_Real& xCYZ, Standard_Real& xCX, Standard_Real& xCY, Standard_Real& xCZ, Standard_Real& xCCte) const;
  
  //! Returns the coefficients of the polynomial equation
  //! ( written in the natural coordinates system )
  //! in the local coordinates system defined by Axis
  Standard_EXPORT void NewCoefficients (Standard_Real& xCXX, Standard_Real& xCYY, Standard_Real& xCZZ, Standard_Real& xCXY, Standard_Real& xCXZ, Standard_Real& xCYZ, Standard_Real& xCX, Standard_Real& xCY, Standard_Real& xCZ, Standard_Real& xCCte, const gp_Ax3& Axis) const;

  //! Returns the list of special points (with singularities)
  const NCollection_List<gp_Pnt>& SpecialPoints() const
  {
    return mySpecialPoints;
  }


protected:





private:



  Standard_Real CXX;
  Standard_Real CYY;
  Standard_Real CZZ;
  Standard_Real CXY;
  Standard_Real CXZ;
  Standard_Real CYZ;
  Standard_Real CX;
  Standard_Real CY;
  Standard_Real CZ;
  Standard_Real CCte;
  NCollection_List<gp_Pnt> mySpecialPoints;

};







#endif // _IntAna_Quadric_HeaderFile