vector_tools_point_gradient.h

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// ---------------------------------------------------------------------
//
// Copyright (C) 1998 - 2020 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>
class DoFHandler;
template <int dim, typename Number>
class Function;
template <int dim, int spacedim>
class Mapping;
template <int dim, typename Number>
class Point;
template <int rank_, int dim, typename Number>
class Tensor;
template <typename Number>
class Vector;
namespace hp
{
  template <int dim, int spacedim>
  class DoFHandler;
  template <int dim, int spacedim>
  class MappingCollection;
} // namespace hp

namespace VectorTools
{

  template <int dim, typename VectorType, int spacedim>
  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>
  void
  point_gradient(
    const hp::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>
  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>
  Tensor<1, spacedim, typename VectorType::value_type>
  point_gradient(const hp::DoFHandler<dim, spacedim> &dof,
                 const VectorType &                   fe_function,
                 const Point<spacedim, double> &      point);

  template <int dim, typename VectorType, int spacedim>
  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>
  void
  point_gradient(
    const hp::MappingCollection<dim, spacedim> &mapping,
    const hp::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>
  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>
  Tensor<1, spacedim, typename VectorType::value_type>
  point_gradient(const hp::MappingCollection<dim, spacedim> &mapping,
                 const hp::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