intergrid_map.h

// ---------------------------------------------------------------------
//
// Copyright (C) 1999 - 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_intergrid_map_h
#define dealii_intergrid_map_h

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

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

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

#include <deal.II/grid/tria_accessor.h>
#include <deal.II/grid/tria_iterator.h>

DEAL_II_NAMESPACE_OPEN


template <class MeshType>
class InterGridMap : public Subscriptor
{
public:
  using cell_iterator = typename MeshType::cell_iterator;

  InterGridMap();

  void
  make_mapping(const MeshType &source_grid, const MeshType &destination_grid);

  cell_iterator operator[](const cell_iterator &source_cell) const;

  void
  clear();

  const MeshType &
  get_source_grid() const;

  const MeshType &
  get_destination_grid() const;

  std::size_t
  memory_consumption() const;

  DeclException1(ExcInvalidKey,
                 cell_iterator,
                 << "The iterator " << arg1 << " is not valid as key for "
                 << "this map.");
  DeclException0(ExcIncompatibleGrids);

private:
  std::vector<std::vector<cell_iterator>> mapping;

  SmartPointer<const MeshType, InterGridMap<MeshType>> source_grid;

  SmartPointer<const MeshType, InterGridMap<MeshType>> destination_grid;

  void
  set_mapping(const cell_iterator &src_cell, const cell_iterator &dst_cell);

  void
  set_entries_to_cell(const cell_iterator &src_cell,
                      const cell_iterator &dst_cell);
};


DEAL_II_NAMESPACE_CLOSE

#endif