jump_error_estimator.h

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// The libMesh Finite Element Library.
// Copyright (C) 2002-2018 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_JUMP_ERROR_ESTIMATOR_H
#define LIBMESH_JUMP_ERROR_ESTIMATOR_H

// Local Includes
#include "libmesh/auto_ptr.h" // deprecated
#include "libmesh/dense_vector.h"
#include "libmesh/error_estimator.h"
#include "libmesh/fem_context.h"

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

namespace libMesh
{

// Forward Declarations
class Point;
class Elem;

class JumpErrorEstimator : public ErrorEstimator
{
public:

  JumpErrorEstimator()
    : ErrorEstimator(),
      scale_by_n_flux_faces(false),
      integrate_boundary_sides(false),
      fine_context(),
      coarse_context(),
      fine_error(0),
      coarse_error(0) {}

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

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

  virtual void estimate_error (const System & system,
                               ErrorVector & error_per_cell,
                               const NumericVector<Number> * solution_vector = nullptr,
                               bool estimate_parent_error = false) override;

  bool scale_by_n_flux_faces;

protected:
  void reinit_sides();

  float coarse_n_flux_faces_increment();

  virtual void init_context(FEMContext & c);

  virtual void internal_side_integration() = 0;

  virtual bool boundary_side_integration() { return false; }

  bool integrate_boundary_sides;

  std::unique_ptr<FEMContext> fine_context, coarse_context;

  Real fine_error, coarse_error;

  unsigned int var;
};


} // namespace libMesh

#endif // LIBMESH_JUMP_ERROR_ESTIMATOR_H