usecases/c/UsesCase_MEDmesh_13.c

/*  This file is part of MED.
 *
 *  COPYRIGHT (C) 1999 - 2015  EDF R&D, CEA/DEN
 *  MED 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  MED 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 MED.  If not, see <http://www.gnu.org/licenses/>.
 */

/*
 *  Use case 13 : a 2D unstructured mesh with 10 nodes and 2 polygons
 * poly1 : 1,4,7,9,6,3
 * poly2 : 2,5,8,10,7,4
 *      9   10
 *
 *   6    7    8
 *
 *   3    4    5
 *
 *      1     2
 *
*/

#include <med.h>
#define MESGERR 1
#include <med_utils.h>

#include <string.h>

int main (int argc, char **argv) {
  med_idt fid;
  const char meshname[MED_NAME_SIZE+1] = "2D unstructured mesh";
  const med_int spacedim = 2;
  const med_int meshdim = 2;
  /*                                         12345678901234561234567890123456 */
  const char axisname[2*MED_SNAME_SIZE+1] = "x               y               ";
  const char unitname[2*MED_SNAME_SIZE+1] = "cm              cm              ";
  /* Dix noeuds dont deux communs aux deux polygones */
  const med_float coordinates[2*10] = { 0.5,   0.,
                                        1.5,   0.,
                                        0.,    0.5,
                                        1.,    0.5,
                                        2.,    0.5,
                                        0.,    1.,
                                        1.,    1.,
                                        2.,    1.,
                                        0.5,   2.,
                                        1.5,   2. };
  const med_int nnodes = 10;
  const med_int indexsize = 3;
  const med_int index[3] = {1,7,13};
  /* connectivity : 2 hexagons */
  const med_int connectivity[12] = {1,4,7,9,6,3,
                                    2,5,8,10,7,4};
  int ret=-1;

  /* open MED file */
  fid = MEDfileOpen("UsesCase_MEDmesh_13.med",
                    MED_ACC_CREAT);
  if (fid < 0) {
    MESSAGE("ERROR : file creation ...");
    goto ERROR;
  }

  /* write a comment in the file */
  if (MEDfileCommentWr(fid,
                       "A 2D unstructured mesh : 12, 12 polygons") < 0) {
    MESSAGE("ERROR : write file description ...");
    goto ERROR;
  }
  
  /* mesh creation : a 2D unstructured mesh */
  if (MEDmeshCr(fid, 
                meshname, 
                spacedim, 
                meshdim, 
                MED_UNSTRUCTURED_MESH, 
                "A 2D mesh with 2 polygons",
                "",
                MED_SORT_DTIT,
                MED_CARTESIAN, 
                axisname, 
                unitname) < 0) {
    MESSAGE("ERROR : mesh creation ...");
    goto ERROR;
  }

  /* nodes coordinates in a cartesian axis in full interlace mode 
     (X1,Y1, X2,Y2, X3,Y3, ...) with no iteration and computation step 
  */
  if (MEDmeshNodeCoordinateWr(fid, 
                              meshname, 
                              MED_NO_DT, 
                              MED_NO_IT, 
                              MED_UNDEF_DT,
                              MED_FULL_INTERLACE, 
                              nnodes, 
                              coordinates) < 0) {
    MESSAGE("ERROR : nodes coordinates ...");
    goto ERROR;
  }

  /* cells connectiviy is defined in nodal mode */
  /* 2 polygons */
  if (MEDmeshPolygonWr(fid,
                       meshname,
                       MED_NO_DT,
                       MED_NO_IT,
                       MED_UNDEF_DT,
                       MED_CELL,
                       MED_NODAL,
                       indexsize,
                       index,
                       connectivity) < 0) {
    MESSAGE("ERROR : polygon connectivity ...");
    goto ERROR;
  }


  /* create family 0 : by default, all mesh entities family number is 0 */
  if (MEDfamilyCr(fid, 
                  meshname,
                  MED_NO_NAME, 
                  0, 
                  0, 
                  MED_NO_GROUP) < 0) {
    MESSAGE("ERROR : family 0 creation ...");
    goto ERROR;
  }

  ret=0;
 ERROR:
  
  /* close MED file */
  if (MEDfileClose(fid)  < 0) {
    MESSAGE("ERROR : close file ...");
    ret=-1;
  }

  return ret;
}

Généré le Thu Oct 8 14:26:16 2015 pour MED fichier par  doxygen 1.6.1