error_estimator.h

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// The libMesh Finite Element Library.
// Copyright (C) 2002-2014 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_ERROR_ESTIMATOR_H
#define LIBMESH_ERROR_ESTIMATOR_H

// Local Includes
#include "libmesh/libmesh_common.h"
#include "libmesh/parallel.h"
#include "libmesh/system_norm.h"

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

namespace libMesh
{

// Forward Declarations
class ErrorVector;
class EquationSystems;
class System;
template <typename T> class NumericVector;

class ErrorEstimator
{
public:

  ErrorEstimator() :
    error_norm()
  {}

  virtual ~ErrorEstimator() {}


  virtual void estimate_error (const System& system,
                               ErrorVector& error_per_cell,
                               const NumericVector<Number>* solution_vector = NULL,
                               bool estimate_parent_error = false) = 0;

  virtual void estimate_errors (const EquationSystems& equation_systems,
                                ErrorVector& error_per_cell,
                                const std::map<const System*, SystemNorm>& error_norms,
                                const std::map<const System*, const NumericVector<Number>* >* solution_vectors = NULL,
                                bool estimate_parent_error = false);

  typedef std::map<std::pair<const System*, unsigned int>, ErrorVector*> ErrorMap;

  virtual void estimate_errors (const EquationSystems& equation_systems,
                                ErrorMap& errors_per_cell,
                                const std::map<const System*, const NumericVector<Number>* >* solution_vectors = NULL,
                                bool estimate_parent_error = false);

  SystemNorm error_norm;

protected:

  void reduce_error (std::vector<float>& error_per_cell,
                     const Parallel::Communicator &comm
                     LIBMESH_CAN_DEFAULT_TO_COMMWORLD) const;
};


} // namespace libMesh

#endif // LIBMESH_ERROR_ESTIMATOR_H