rb_eim_evaluation.h

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// rbOOmit: An implementation of the Certified Reduced Basis method.
// Copyright (C) 2009, 2010 David J. Knezevic

// This file is part of rbOOmit.

// rbOOmit 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.

// rbOOmit 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_RB_EIM_EVALUATION_H
#define LIBMESH_RB_EIM_EVALUATION_H

// libMesh includes
#include "libmesh/auto_ptr.h" // deprecated
#include "libmesh/point.h"
#include "libmesh/rb_evaluation.h"
#include "libmesh/replicated_mesh.h"
#include "libmesh/rb_theta_expansion.h"

// C++ includes
#include <memory>

namespace libMesh
{

class RBParameters;
class RBParametrizedFunction;
class Elem;
class RBTheta;

class RBEIMEvaluation : public RBEvaluation
{
public:

  RBEIMEvaluation (const libMesh::Parallel::Communicator & comm_in);

  virtual ~RBEIMEvaluation ();

  typedef RBEvaluation Parent;

  virtual void clear() override;

  virtual void resize_data_structures(const unsigned int Nmax,
                                      bool resize_error_bound_data=true) override;

  void attach_parametrized_function(RBParametrizedFunction * pf);


  unsigned int get_n_parametrized_functions() const;

  ReplicatedMesh & get_interpolation_points_mesh();

  Number evaluate_parametrized_function(unsigned int var_index,
                                        const Point & p,
                                        const Elem & elem);

  virtual Real rb_solve(unsigned int N) override;

  void rb_solve(DenseVector<Number> & EIM_rhs);

  virtual Real get_error_bound_normalization() override;

  void initialize_eim_theta_objects();

  std::vector<std::unique_ptr<RBTheta>> & get_eim_theta_objects();

  virtual std::unique_ptr<RBTheta> build_eim_theta(unsigned int index);

  virtual void legacy_write_offline_data_to_files(const std::string & directory_name = "offline_data",
                                                  const bool write_binary_data=true) override;

  virtual void legacy_read_offline_data_from_files(const std::string & directory_name = "offline_data",
                                                   bool read_error_bound_data=true,
                                                   const bool read_binary_data=true) override;

  //----------- PUBLIC DATA MEMBERS -----------//

  DenseMatrix<Number> interpolation_matrix;

  std::vector<Point> interpolation_points;

  std::vector<unsigned int> interpolation_points_var;

  std::vector<Elem *> interpolation_points_elem;

private:

  void legacy_write_out_interpolation_points_elem(const std::string & directory_name);

  void legacy_read_in_interpolation_points_elem(const std::string & directory_name);

  std::vector<RBParametrizedFunction *> _parametrized_functions;

  std::vector<std::unique_ptr<RBTheta>> _rb_eim_theta_objects;

  RBThetaExpansion _empty_rb_theta_expansion;

  RBParameters _previous_parameters;

  unsigned int _previous_N;

  Real _previous_error_bound;

  ReplicatedMesh _interpolation_points_mesh;

};

}

#endif // LIBMESH_RB_EIM_EVALUATION_H