vector_tools_mean_value.h

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// ---------------------------------------------------------------------
//
// Copyright (C) 1998 - 2023 by the deal.II authors
//
// This file is part of the deal.II library.
//
// The deal.II library is free software; you can use it, 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.
// The full text of the license can be found in the file LICENSE.md at
// the top level directory of deal.II.
//
// ---------------------------------------------------------------------
 
#ifndef dealii_vector_tools_mean_value_h
#define dealii_vector_tools_mean_value_h
 
 
#include <deal.II/base/config.h>
 
#include <vector>
 
DEAL_II_NAMESPACE_OPEN
 
#ifndef DOXYGEN
// forward declarations
template <int dim, int spacedim>
DEAL_II_CXX20_REQUIRES((concepts::is_valid_dim_spacedim<dim, spacedim>))
class DoFHandler;
template <int dim, int spacedim>
class Mapping;
template <int dim>
class Quadrature;
namespace hp
{
  template <int dim, int spacedim>
  class MappingCollection;
  template <int dim>
  class QCollection;
} // namespace hp
#endif
 
namespace VectorTools
{
  template <typename VectorType>
  DEAL_II_CXX20_REQUIRES(concepts::is_writable_dealii_vector_type<VectorType>)
  void subtract_mean_value(VectorType &             v,
                           const std::vector<bool> &p_select = {});
 
  template <class VectorType, int dim, int spacedim = dim>
  DEAL_II_CXX20_REQUIRES(concepts::is_writable_dealii_vector_type<VectorType>)
  void add_constant(VectorType &                          solution,
                    const DoFHandler<dim, spacedim> &     dof_handler,
                    const unsigned int                    component,
                    const typename VectorType::value_type constant_adjustment);
 
  template <int dim, typename VectorType, int spacedim>
  DEAL_II_CXX20_REQUIRES(concepts::is_dealii_vector_type<VectorType>)
  typename VectorType::value_type compute_mean_value(
    const hp::MappingCollection<dim, spacedim> &mapping_collection,
    const DoFHandler<dim, spacedim> &           dof,
    const hp::QCollection<dim> &                q_collection,
    const VectorType &                          v,
    const unsigned int                          component);
 
  template <int dim, typename VectorType, int spacedim>
  DEAL_II_CXX20_REQUIRES(concepts::is_dealii_vector_type<VectorType>)
  typename VectorType::value_type
    compute_mean_value(const Mapping<dim, spacedim> &   mapping,
                       const DoFHandler<dim, spacedim> &dof,
                       const Quadrature<dim> &          quadrature,
                       const VectorType &               v,
                       const unsigned int               component);
 
  template <int dim, typename VectorType, int spacedim>
  DEAL_II_CXX20_REQUIRES(concepts::is_dealii_vector_type<VectorType>)
  typename VectorType::value_type
    compute_mean_value(const DoFHandler<dim, spacedim> &dof,
                       const Quadrature<dim> &          quadrature,
                       const VectorType &               v,
                       const unsigned int               component);
} // namespace VectorTools
 
DEAL_II_NAMESPACE_CLOSE
 
#endif // dealii_vector_tools_mean_value_h