vector_tools_point_gradient.h

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// ------------------------------------------------------------------------
//
// 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_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