vector_tools_point_gradient.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.
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#ifndef dealii_vector_tools_point_gradient_h
#define dealii_vector_tools_point_gradient_h
 
 
#include <deal.II/base/config.h>
 
#include <vector>
 
 
DEAL_II_NAMESPACE_OPEN
 
template <int dim, int spacedim>
DEAL_II_CXX20_REQUIRES((concepts::is_valid_dim_spacedim<dim, spacedim>))
class DoFHandler;
 
template <int dim, typename Number>
class Function;
template <int dim, int spacedim>
class Mapping;
 
template <int dim, typename Number>
DEAL_II_CXX20_REQUIRES(dim >= 0)
class Point;
 
template <int rank_, int dim, typename Number>
class Tensor;
template <typename Number>
class Vector;
namespace hp
{
  template <int dim, int spacedim>
  class MappingCollection;
} // namespace hp
 
namespace VectorTools
{
  template <int dim, typename VectorType, int spacedim>
  DEAL_II_CXX20_REQUIRES(concepts::is_dealii_vector_type<VectorType>)
  void point_gradient(
    const DoFHandler<dim, spacedim> &dof,
    const VectorType &               fe_function,
    const Point<spacedim, double> &  point,
    std::vector<Tensor<1, spacedim, typename VectorType::value_type>> &value);
 
  template <int dim, typename VectorType, int spacedim>
  DEAL_II_CXX20_REQUIRES(concepts::is_dealii_vector_type<VectorType>)
  void point_gradient(
    const DoFHandler<dim, spacedim> &dof,
    const VectorType &               fe_function,
    const Point<spacedim, double> &  point,
    std::vector<Tensor<1, spacedim, typename VectorType::value_type>> &value);
 
  template <int dim, typename VectorType, int spacedim>
  DEAL_II_CXX20_REQUIRES(concepts::is_dealii_vector_type<VectorType>)
  Tensor<1, spacedim, typename VectorType::value_type> point_gradient(
    const DoFHandler<dim, spacedim> &dof,
    const VectorType &               fe_function,
    const Point<spacedim, double> &  point);
 
  template <int dim, typename VectorType, int spacedim>
  DEAL_II_CXX20_REQUIRES(concepts::is_dealii_vector_type<VectorType>)
  Tensor<1, spacedim, typename VectorType::value_type> point_gradient(
    const DoFHandler<dim, spacedim> &dof,
    const VectorType &               fe_function,
    const Point<spacedim, double> &  point);
 
  template <int dim, typename VectorType, int spacedim>
  DEAL_II_CXX20_REQUIRES(concepts::is_dealii_vector_type<VectorType>)
  void point_gradient(
    const Mapping<dim, spacedim> &   mapping,
    const DoFHandler<dim, spacedim> &dof,
    const VectorType &               fe_function,
    const Point<spacedim, double> &  point,
    std::vector<Tensor<1, spacedim, typename VectorType::value_type>> &value);
 
  template <int dim, typename VectorType, int spacedim>
  DEAL_II_CXX20_REQUIRES(concepts::is_dealii_vector_type<VectorType>)
  void point_gradient(
    const hp::MappingCollection<dim, spacedim> &mapping,
    const DoFHandler<dim, spacedim> &           dof,
    const VectorType &                          fe_function,
    const Point<spacedim, double> &             point,
    std::vector<Tensor<1, spacedim, typename VectorType::value_type>> &value);
 
  template <int dim, typename VectorType, int spacedim>
  DEAL_II_CXX20_REQUIRES(concepts::is_dealii_vector_type<VectorType>)
  Tensor<1, spacedim, typename VectorType::value_type> point_gradient(
    const Mapping<dim, spacedim> &   mapping,
    const DoFHandler<dim, spacedim> &dof,
    const VectorType &               fe_function,
    const Point<spacedim, double> &  point);
 
  template <int dim, typename VectorType, int spacedim>
  DEAL_II_CXX20_REQUIRES(concepts::is_dealii_vector_type<VectorType>)
  Tensor<1, spacedim, typename VectorType::value_type> point_gradient(
    const hp::MappingCollection<dim, spacedim> &mapping,
    const DoFHandler<dim, spacedim> &           dof,
    const VectorType &                          fe_function,
    const Point<spacedim, double> &             point);
 
} // namespace VectorTools
 
DEAL_II_NAMESPACE_CLOSE
 
#endif // dealii_vector_tools_point_gradient_h