usecases/c/UsesCase_MEDmesh_4.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/>.
 */


/*
 *  How to create a structured mesh 
 *
 *  Use case 4 :  write a 2D structured mesh (5x3 cartesian grid)
 */

#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 structured mesh";
  const med_int spacedim = 2;
  const med_int meshdim = 2;
  const char axisname[2*MED_SNAME_SIZE+1] = "x               y               ";
  const char unitname[2*MED_SNAME_SIZE+1] = "cm              cm              ";
  med_int axis, size ;
  const med_float cooXaxis[5] = {1.,2.,3.,4.,5.};
  const med_float cooYaxis[3] = {1.,2.,3.};
  /*                    12345678901234561234567890123456123456789012345612345678901234561234567890123456123456789012345612345678901234561234567890123456 */
  const char cellsnames[8*MED_SNAME_SIZE+1] = "CELL_1          CELL_2          CELL_3          CELL_4          CELL_5          CELL_6          CELL_7          CELL_8          ";
  const med_int nquad4 = 8;
  int ret=-1;

  /* MED file creation */
  fid = MEDfileOpen("UsesCase_MEDmesh_4.med",MED_ACC_CREAT);
  if (fid < 0) {
    MESSAGE("ERROR : file creation ...");
    goto ERROR;
  }

  /* create the structured mesh in the MED file */
  if (MEDmeshCr(fid, meshname, spacedim, meshdim, MED_STRUCTURED_MESH,  
                "A 2D structured mesh","",MED_SORT_DTIT,
                MED_CARTESIAN, axisname, unitname) < 0) {
    MESSAGE("ERROR : mesh creation ...");
    goto ERROR;
  }
  
  /* specify the grid type : MED_CARTESIAN_GRID */
   if (MEDmeshGridTypeWr(fid,meshname, MED_CARTESIAN_GRID) < 0) {
    MESSAGE("ERROR : write grid type ...");
    goto ERROR;
  }
  
   /* write axis "X" and "Y" coordinates */ 
   axis = 1;
   size = 5;
   if (MEDmeshGridIndexCoordinateWr(fid, meshname, MED_NO_DT, MED_NO_IT,0.0, 
                                    axis, size, cooXaxis) < 0) {
     MESSAGE("ERROR : write of axis X coordinates ...");
     goto ERROR;
   }
  axis++;
  size = 3;
  if (MEDmeshGridIndexCoordinateWr(fid, meshname, MED_NO_DT, MED_NO_IT,0.0, 
                                   axis, size, cooYaxis) < 0) {
    MESSAGE("ERROR : write of axis Y coordinates ...");
    goto ERROR;
  }

  /* optionnal : names for nodes or elements */
  /* In this case, a name is given to the cells of the mesh */
  if (MEDmeshEntityNameWr(fid, meshname, MED_NO_DT, MED_NO_IT,
                          MED_CELL, MED_QUAD4, nquad4, 
                          cellsnames) < 0) {
    MESSAGE("ERROR : cells names  ...");
    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 : quadrangular cells connectivity ...");
    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