hp_coarsentest.h

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// The libMesh Finite Element Library.
// Copyright (C) 2002-2025 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner

// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.

// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA



#ifndef LIBMESH_HP_COARSENTEST_H
#define LIBMESH_HP_COARSENTEST_H

// Local Includes
#include "libmesh/dense_matrix.h"
#include "libmesh/dense_vector.h"
#include "libmesh/hp_selector.h"
#include "libmesh/id_types.h"
#include "libmesh/libmesh_common.h"
#include "libmesh/fe.h"         // MipsPro requires fe.h and quadrature.h
#include "libmesh/quadrature.h" // Required for inline deletion std::unique_ptrs<> in destructor

// C++ includes
#include <vector>
#include <memory>

#ifdef LIBMESH_ENABLE_AMR

namespace libMesh
{

// Forward Declarations
class Elem;
class Point;
class System;
template <typename T> class TensorValue;
template <typename T> class VectorValue;
typedef VectorValue<Real> RealVectorValue;
typedef TensorValue<Real> RealTensorValue;
typedef RealVectorValue RealGradient;
typedef RealTensorValue RealTensor;


class HPCoarsenTest : public HPSelector
{
public:

  HPCoarsenTest() : p_weight(1.0), _extra_order(1)
  {
    libmesh_experimental();
  }

  HPCoarsenTest (const HPCoarsenTest &) = delete;
  HPCoarsenTest & operator= (const HPCoarsenTest &) = delete;

  HPCoarsenTest (HPCoarsenTest &&) = default;
  HPCoarsenTest & operator= (HPCoarsenTest &&) = default;
  virtual ~HPCoarsenTest() = default;

  virtual void select_refinement (System & system) override;

  Real p_weight;

  void extra_quadrature_order (const int extraorder)
  { _extra_order = extraorder; }

protected:
  void add_projection(const System &, const Elem *, unsigned int var);

  Elem * coarse;

  std::vector<dof_id_type> dof_indices;

  std::unique_ptr<FEBase> fe, fe_coarse;

  const std::vector<std::vector<Real>> * phi, * phi_coarse;
  const std::vector<std::vector<RealGradient>> * dphi, * dphi_coarse;
  const std::vector<std::vector<RealTensor>> * d2phi, * d2phi_coarse;

  const std::vector<Real> * JxW;

  const std::vector<Point> * xyz_values;
  std::vector<Point> coarse_qpoints;

  std::unique_ptr<QBase> qrule;

  DenseMatrix<Number> Ke;
  DenseVector<Number> Fe;
  DenseVector<Number> Uc;
  DenseVector<Number> Up;

  int _extra_order;
};

} // namespace libMesh

#endif // #ifdef LIBMESH_ENABLE_AMR

#endif // LIBMESH_HP_COARSENTEST_H