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 at
// the top level of the deal.II distribution.
//
// ---------------------------------------------------------------------

#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