// Created on: 1997-09-18
// Created by: Philippe MANGIN
// 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 _FEmTool_LinearTension_HeaderFile
#define _FEmTool_LinearTension_HeaderFile

#include "Standard.hxx"
#include "Standard_Type.hxx"

#include "math_Matrix.hxx"
#include "Standard_Integer.hxx"
#include "FEmTool_ElementaryCriterion.hxx"
#include "GeomAbs_Shape.hxx"
#include "NCollection_Array2.hxx"
#include "NCollection_HArray2.hxx"
#include "math_Vector.hxx"

//! Criterium of LinearTension To Hermit-Jacobi elements
class FEmTool_LinearTension : public FEmTool_ElementaryCriterion
{

public:
  Standard_EXPORT FEmTool_LinearTension(const int WorkDegree, const GeomAbs_Shape ConstraintOrder);

  Standard_EXPORT occ::handle<NCollection_HArray2<int>> DependenceTable() const override;

  Standard_EXPORT double Value() override;

  Standard_EXPORT void Hessian(const int Dimension1, const int Dimension2, math_Matrix& H) override;

  Standard_EXPORT void Gradient(const int Dimension, math_Vector& G) override;

  DEFINE_STANDARD_RTTIEXT(FEmTool_LinearTension, FEmTool_ElementaryCriterion)

private:
  math_Matrix RefMatrix;
  int         myOrder;
};

#endif // _FEmTool_LinearTension_HeaderFile