Line data    Source code

       1             : // The libMesh Finite Element Library.
       2             : // Copyright (C) 2002-2025 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
       3             : 
       4             : // This library is free software; you can redistribute it and/or
       5             : // modify it under the terms of the GNU Lesser General Public
       6             : // License as published by the Free Software Foundation; either
       7             : // version 2.1 of the License, or (at your option) any later version.
       8             : 
       9             : // This library is distributed in the hope that it will be useful,
      10             : // but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12             : // Lesser General Public License for more details.
      13             : 
      14             : // You should have received a copy of the GNU Lesser General Public
      15             : // License along with this library; if not, write to the Free Software
      16             : // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
      17             : 
      18             : 
      19             : 
      20             : #ifndef LIBMESH_TETGEN_IO_H
      21             : #define LIBMESH_TETGEN_IO_H
      22             : 
      23             : // Local includes
      24             : #include "libmesh/libmesh_common.h"
      25             : #include "libmesh/mesh_input.h"
      26             : #include "libmesh/mesh_output.h"
      27             : 
      28             : // C++ includes
      29             : #include <cstddef>
      30             : #include <map>
      31             : 
      32             : namespace libMesh
      33             : {
      34             : 
      35             : // Forward declarations
      36             : class MeshBase;
      37             : 
      38             : 
      39             : /**
      40             :  * This class implements reading and writing meshes in the TetGen format.
      41             :  * Format description:
      42             :  * cf. <a href="http://tetgen.berlios.de/">TetGen home page</a>.
      43             :  *
      44             :  * \author Benjamin S. Kirk
      45             :  * \date 2004
      46             :  */
      47             : class TetGenIO : public MeshInput<MeshBase>,
      48             :                  public MeshOutput<MeshBase>
      49             : {
      50             : public:
      51             : 
      52             :   /**
      53             :    * Constructor.  Takes a writable reference to a mesh object.
      54             :    * This is the constructor required to read a mesh.
      55             :    */
      56             :   explicit
      57             :   TetGenIO (MeshBase & mesh);
      58             : 
      59             :   /**
      60             :    * Constructor.  Takes a read-only reference to a mesh object.
      61             :    * This is the constructor required to write a mesh.
      62             :    */
      63             :   explicit
      64             :   TetGenIO (const MeshBase & mesh);
      65             : 
      66             :   /**
      67             :    * This method implements reading a mesh from a specified file
      68             :    * in TetGen format.
      69             :    */
      70             :   virtual void read (const std::string &) override;
      71             : 
      72             :   /**
      73             :    * This method implements writing a mesh to a specified ".poly" file.
      74             :    * ".poly" files defines so called Piecewise Linear Complex (PLC).
      75             :    */
      76             :   virtual void write (const std::string &) override;
      77             : 
      78             :   /**
      79             :    * Data structure to hold node attributes read in from file.
      80             :    * What you do with these is up to you!
      81             :    */
      82             :   std::vector<std::vector<Real>> node_attributes;
      83             : 
      84             : private:
      85             : 
      86             : 
      87             :   //-------------------------------------------------------------
      88             :   // read support methods
      89             : 
      90             :   /**
      91             :    * Reads a mesh (nodes & elements) from the file
      92             :    * provided through \p node_stream and ele_stream.
      93             :    */
      94             :   void read_nodes_and_elem (std::istream & node_stream,
      95             :                             std::istream & ele_stream);
      96             : 
      97             :   /**
      98             :    * Method reads nodes from \p node_stream and stores them in
      99             :    * vector<Node *> \p nodes in the order they come in.
     100             :    * The original node labels are being stored in the
     101             :    * map \p _assign_nodes in order to assign the elements to
     102             :    * the right nodes later.
     103             :    */
     104             :   void node_in (std::istream & node_stream);
     105             : 
     106             :   /**
     107             :    * Method reads elements and stores them in
     108             :    * vector<Elem *> \p elements in the same order as they
     109             :    * come in. Within \p TetGenMeshInterface, element labels are
     110             :    * ignored.
     111             :    */
     112             :   void element_in (std::istream & ele_stream);
     113             : 
     114             :   //-------------------------------------------------------------
     115             :   // local data
     116             : 
     117             :   /**
     118             :    * stores new positions of nodes. Used when reading.
     119             :    */
     120             :   std::map<dof_id_type,dof_id_type> _assign_nodes;
     121             : 
     122             :   /**
     123             :    * total number of nodes. Primarily used when reading.
     124             :    */
     125             :   dof_id_type _num_nodes;
     126             : 
     127             :   /**
     128             :    * total number of elements. Primarily used when reading.
     129             :    */
     130             :   dof_id_type _num_elements;
     131             : };
     132             : 
     133             : 
     134             : 
     135             : // ------------------------------------------------------------
     136             : // TetGenIO inline members
     137             : inline
     138           0 : TetGenIO::TetGenIO (MeshBase & mesh) :
     139             :   MeshInput<MeshBase> (mesh),
     140           0 :   MeshOutput<MeshBase>(mesh)
     141             : {
     142           0 : }
     143             : 
     144             : 
     145             : 
     146             : inline
     147           0 : TetGenIO::TetGenIO (const MeshBase & mesh) :
     148           0 :   MeshOutput<MeshBase>(mesh)
     149             : {
     150           0 : }
     151             : 
     152             : 
     153             : } // namespace libMesh
     154             : 
     155             : 
     156             : #endif // LIBMESH_TETGEN_IO_H