grid_reordering.h

// ---------------------------------------------------------------------
//
// Copyright (C) 2000 - 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_grid_reordering_h
#define dealii_grid_reordering_h


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

#include <deal.II/grid/tria.h>

#include <vector>

DEAL_II_NAMESPACE_OPEN

DeclExceptionMsg(ExcMeshNotOrientable,
                 "The edges of the mesh are not consistently orientable.");


template <int dim, int spacedim = dim>
class GridReordering
{
public:
  static void
  reorder_cells(std::vector<CellData<dim>> &original_cells,
                const bool                  use_new_style_ordering = false);

  static void
  invert_all_cells_of_negative_grid(
    const std::vector<Point<spacedim>> &all_vertices,
    std::vector<CellData<dim>> &        original_cells);
};


// declaration of explicit specializations
template <>
void
GridReordering<2>::invert_all_cells_of_negative_grid(
  const std::vector<Point<2>> &all_vertices,
  std::vector<CellData<2>> &   cells);

template <>
void
GridReordering<2, 3>::invert_all_cells_of_negative_grid(
  const std::vector<Point<3>> &all_vertices,
  std::vector<CellData<2>> &   cells);

template <>
void
GridReordering<3>::invert_all_cells_of_negative_grid(
  const std::vector<Point<3>> &all_vertices,
  std::vector<CellData<3>> &   cells);

DEAL_II_NAMESPACE_CLOSE

#endif