mesh_tetgen_interface.h

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// The libMesh Finite Element Library.
// Copyright (C) 2002-2018 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner

// This library is free software; you can 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.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.

// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


#ifndef LIBMESH_MESH_TETGEN_INTERFACE_H
#define LIBMESH_MESH_TETGEN_INTERFACE_H

#include "libmesh/libmesh_config.h"
#ifdef LIBMESH_HAVE_TETGEN


// Local includes
#include "libmesh/mesh_serializer.h"
#include "libmesh/point.h" // used for specifying holes

// C++ includes
#include <cstddef>
#include <map>
#include <string>
#include <vector>

namespace libMesh
{
// Forward Declarations
class UnstructuredMesh;
class TetGenWrapper;
class Elem;

class TetGenMeshInterface
{
public:

  explicit
  TetGenMeshInterface (UnstructuredMesh & mesh);

  ~TetGenMeshInterface() {}

  void set_switches(const std::string &);

  void triangulate_pointset ();

  void pointset_convexhull ();

  void triangulate_conformingDelaunayMesh (double quality_constraint=0.,
                                           double volume_constraint=0.);

  void triangulate_conformingDelaunayMesh_carvehole (const std::vector<Point> & holes,
                                                     double quality_constraint=0.,
                                                     double volume_constraint=0.);



protected:
  void fill_pointlist(TetGenWrapper & wrapper);

  void assign_nodes_to_elem(unsigned * node_labels, Elem * elem);

  unsigned check_hull_integrity();

  void process_hull_integrity_result(unsigned result);

  void delete_2D_hull_elements();

  UnstructuredMesh & _mesh;

  std::vector<unsigned> _sequential_to_libmesh_node_map;

  MeshSerializer _serializer;

  std::string _switches;
};

} // namespace libMesh

#endif // LIBMESH_HAVE_TETGEN

#endif // LIBMESH_MESH_TETGEN_INTERFACE_H