t8_cmesh_readmshfile.h

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/*
  This file is part of t8code.
  t8code is a C library to manage a collection (a forest) of multiple
  connected adaptive space-trees of general element classes in parallel.
 
  Copyright (C) 2015 the developers
 
  t8code is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.
 
  t8code 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 General Public License for more details.
 
  You should have received a copy of the GNU General Public License
  along with t8code; if not, write to the Free Software Foundation, Inc.,
  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
 
#ifndef T8_CMESH_READMSHFILE_H
#define T8_CMESH_READMSHFILE_H
 
#include <t8.h>
#include <t8_eclass.h>
#include <t8_cmesh.h>
 
/* The supported .msh file versions.
 * Currently, we support gmsh's file version 2 and 4 in ASCII format.
 */
#define T8_CMESH_N_SUPPORTED_MSH_FILE_VERSIONS 2
 
/* *INDENT-OFF* */
const int
t8_cmesh_supported_msh_file_versions[T8_CMESH_N_SUPPORTED_MSH_FILE_VERSIONS] = 
{
  2, 4
};
/* *INDENT-ON* */
 
/* put typedefs here */
 
/* The nodes are stored in the .msh file in the format
 *
 * $Nodes
 * n_nodes     // The number of nodes
 * i x_i y_i z_i  // the node index and the node coordinates
 * j x_j y_j z_j
 * .....
 * $EndNodes
 *
 * The node indices do not need to be in consecutive order.
 * We thus use a hash table to read all node indices and coordinates.
 * The hash value is the node index modulo the number of nodes.
 */
typedef struct
{
  t8_locidx_t         index;
  double              coordinates[3];
} t8_msh_file_node_t;
 
typedef struct
{
  t8_locidx_t         index;
  double              coordinates[3];
  double              parameters[2];
  int                 parametric;
  int                 entity_dim;
  t8_locidx_t         entity_tag;
} t8_msh_file_node_parametric_t;
 
T8_EXTERN_C_BEGIN ();
 
/* put declarations here */
 
/* *INDENT-OFF* */
t8_cmesh_t
t8_cmesh_from_msh_file (const char *fileprefix, int partition,
                        sc_MPI_Comm comm, int dim, int master,
                        int use_occ_geometry);
/* *INDENT-ON* */
 
T8_EXTERN_C_END ();
 
#endif /* !T8_CMESH_READMSHFILE_H */