mapping_q1_eulerian.h

// ---------------------------------------------------------------------
//
// Copyright (C) 2001 - 2018 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_mapping_q1_eulerian_h
#define dealii_mapping_q1_eulerian_h

#include <deal.II/base/config.h>

#include <deal.II/base/smartpointer.h>

#include <deal.II/dofs/dof_handler.h>

#include <deal.II/fe/mapping_q1.h>

#include <array>

DEAL_II_NAMESPACE_OPEN

template <typename>
class Vector;



template <int dim, typename VectorType = Vector<double>, int spacedim = dim>
class MappingQ1Eulerian : public MappingQGeneric<dim, spacedim>
{
public:
  MappingQ1Eulerian(const DoFHandler<dim, spacedim> &euler_dof_handler,
                    const VectorType &               euler_vector);

  virtual std::array<Point<spacedim>, GeometryInfo<dim>::vertices_per_cell>
  get_vertices(const typename Triangulation<dim, spacedim>::cell_iterator &cell)
    const override;

  virtual std::unique_ptr<Mapping<dim, spacedim>>
  clone() const override;

  virtual bool
  preserves_vertex_locations() const override;

  DeclException0(ExcInactiveCell);



protected:
  virtual CellSimilarity::Similarity
  fill_fe_values(
    const typename Triangulation<dim, spacedim>::cell_iterator &cell,
    const CellSimilarity::Similarity                            cell_similarity,
    const Quadrature<dim> &                                     quadrature,
    const typename Mapping<dim, spacedim>::InternalDataBase &   internal_data,
    internal::FEValuesImplementation::MappingRelatedData<dim, spacedim>
      &output_data) const override;

  virtual std::vector<Point<spacedim>>
  compute_mapping_support_points(
    const typename Triangulation<dim, spacedim>::cell_iterator &cell)
    const override;

  SmartPointer<const VectorType, MappingQ1Eulerian<dim, VectorType, spacedim>>
    euler_transform_vectors;

  SmartPointer<const DoFHandler<dim, spacedim>,
               MappingQ1Eulerian<dim, VectorType, spacedim>>
    shiftmap_dof_handler;
};

/*----------------------------------------------------------------------*/

#ifndef DOXYGEN

template <int dim, typename VectorType, int spacedim>
inline bool
MappingQ1Eulerian<dim, VectorType, spacedim>::preserves_vertex_locations() const
{
  return false;
}

#endif // DOXYGEN

DEAL_II_NAMESPACE_CLOSE

#endif