vector_tools_mean_value.h

Go to the documentation of this file.

// ------------------------------------------------------------------------
//
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2020 - 2023 by the deal.II authors
//
// This file is part of the deal.II library.
//
// Part of the source code is dual licensed under Apache-2.0 WITH
// LLVM-exception OR LGPL-2.1-or-later. Detailed license information
// governing the source code and code contributions can be found in
// LICENSE.md and CONTRIBUTING.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 <deal.II/lac/read_vector.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 <typename 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 Number, int spacedim>
  Number
  compute_mean_value(
    const hp::MappingCollection<dim, spacedim> &mapping_collection,
    const DoFHandler<dim, spacedim>            &dof,
    const hp::QCollection<dim>                 &q_collection,
    const ReadVector<Number>                   &v,
    const unsigned int                          component);
 
  template <int dim, typename Number, int spacedim>
  Number
  compute_mean_value(const Mapping<dim, spacedim>    &mapping,
                     const DoFHandler<dim, spacedim> &dof,
                     const Quadrature<dim>           &quadrature,
                     const ReadVector<Number>        &v,
                     const unsigned int               component);
 
  template <int dim, typename Number, int spacedim>
  Number
  compute_mean_value(const DoFHandler<dim, spacedim> &dof,
                     const Quadrature<dim>           &quadrature,
                     const ReadVector<Number>        &v,
                     const unsigned int               component);
} // namespace VectorTools
 
DEAL_II_NAMESPACE_CLOSE
 
#endif // dealii_vector_tools_mean_value_h