usecases/c/UsesCase_MEDfield_18.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/>.
 */

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

#include <string.h>

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

#include <string.h>

/* 
 * Field use case 18 : read a field (generic approach) in a MED file with
 *                     values defined on integration points on struct elements
 */


int main (int argc, char **argv) {
  med_idt fid,mfid,sfid,cmfid;
  med_idt nfield, i, j;
  char meshname[MED_NAME_SIZE+1]="";
  med_bool localmesh;
  char fieldname[MED_NAME_SIZE+1]="";
  med_field_type fieldtype;
  char *componentname = NULL;
  char *componentunit = NULL;
  char dtunit[MED_SNAME_SIZE+1]="";
  med_float *values = NULL;
  med_int nstep, nvalues;
  med_int ncomponent;
  med_int csit, numit, numdt, it;
  med_float dt;
  med_geometry_type *geotypes=NULL, geotype;
  med_int nmodels;
  med_int nprofile, pit, profilesize;
  char profilename[MED_NAME_SIZE+1]="";
  med_int nintegrationpoint;
  char localizationname[MED_NAME_SIZE+1]="";
  int k;
  char elementname[MED_NAME_SIZE+1]="";
  char supportmeshname[MED_NAME_SIZE+1]="";
  med_entity_type entitype;
  med_int elementdim;
  med_int nnode,ncell;
  med_geometry_type geocelltype;
  med_bool anyprofile=0;
  med_int nconstatt, *nvaratt=NULL;
  med_bool coordinatechangement;
  med_bool geotransformation;
  int ret=-1;


  /* open file */
  fid = MEDfileOpen("UsesCase_MEDfield_17.med",MED_ACC_RDWR);
  if (fid < 0) {
    MESSAGE("ERROR : open file ...");
    return -1;
  }

  if (( mfid=MEDfileObjectsMount(fid,  "UsesCase_MEDstructElement_1.med",MED_MESH_SUPPORT)) < 0 ) {
    MESSAGE("ERROR : file mounting ...");
    return -1;
  }

  if (( sfid=MEDfileObjectsMount(fid,  "UsesCase_MEDstructElement_1.med",MED_ELSTRUCT)) < 0 ) {
    MESSAGE("ERROR : file mounting ...");
    return -1;
  }

  if (( cmfid=MEDfileObjectsMount(fid,  "UsesCase_MEDstructElement_1.med",MED_MESH)) < 0 ) {
    MESSAGE("ERROR : file mounting ...");
    return -1;
  }


  /*
   * generic approach : how many fields in the file and identification
   * of each field.
   */
  if ((nfield = MEDnField(fid)) < 0) {
    MESSAGE("ERROR : How many fields in the file ...");
    return -1;
  }

  /*
   * read values for each field
   */
  for (i=0; i<nfield; i++) {

    if ((ncomponent = MEDfieldnComponent(fid,i+1)) < 0) {
      MESSAGE("ERROR : number of field component ...");
      return -1;
    }
    
    if ((componentname = (char *) malloc(ncomponent*MED_SNAME_SIZE+1)) == NULL) {
      MESSAGE("ERROR : memory allocation ...");
      return -1;
    }

    if ((componentunit = (char *) malloc(ncomponent*MED_SNAME_SIZE+1)) == NULL) {
      MESSAGE("ERROR : memory allocation ...");
      return -1;
    }

    if (MEDfieldInfo(fid, i+1, fieldname, meshname, &localmesh, &fieldtype,
                     componentname, componentunit, dtunit, &nstep) < 0) {
      MESSAGE("ERROR : Field info ...");
      free(componentname);
      free(componentunit);
      return -1;
    }

    free(componentname);
    free(componentunit);

    /* read how many struct element models in the mesh ? */
    if ((nmodels = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT, MED_STRUCT_ELEMENT, MED_GEO_ALL,
                                  MED_UNDEF_DATATYPE, MED_NO_CMODE,&coordinatechangement,
                                  &geotransformation)) < 0) {
      MESSAGE("ERROR : number of nodes ...");
      return -1;
    }
    geotypes = (med_geometry_type *) malloc(sizeof(med_geometry_type)*nmodels);
    nvaratt = (med_int *) malloc(sizeof(med_int)*nmodels);
    
    for (it=0; it<nmodels; it++) {
      if (MEDstructElementInfo(mfid, it+1, elementname, geotypes+it, &elementdim,
                               supportmeshname, &entitype, &nnode, &ncell,
                               &geocelltype, &nconstatt, &anyprofile, nvaratt+it) < 0) {
        MESSAGE("ERROR : struct element models information ...");
        return -1;
      }
    }


    /*
     * Read field values for each computing step 
     */ 
    for (csit=0; csit<nstep; csit++) {

      if (MEDfieldComputingStepInfo(fid, fieldname, csit+1, &numdt, &numit, &dt) < 0) {
        MESSAGE("ERROR : Computing step info ...");
        return -1;
      }

      /* 
       * ... In our case, we suppose that the field values are only defined on struct element ... 
       */
      for (it=0; it<nmodels; it++) {
        geotype = *(geotypes+it);
        
        /*
         * How many profile for each geometry type ? 
         */
        if ((nprofile = MEDfieldnProfile(fid, fieldname, numdt, numit, MED_STRUCT_ELEMENT, geotype,
                                         profilename, localizationname)) < 0) {
          MESSAGE("ERROR : read number of profile ");
          return -1;
        }

        /* 
         * Read values for each profile
         */
        for (pit=0; pit<nprofile; pit++) {
          
          if ((nvalues = MEDfieldnValueWithProfile(fid, fieldname, numdt, numit, MED_STRUCT_ELEMENT, geotype,
                                                   pit+1, MED_COMPACT_PFLMODE, profilename, &profilesize,
                                                   localizationname, &nintegrationpoint)) < 0) {
            MESSAGE("ERROR : read number of values with a profile ...");
            return -1;
          } 
          
          if (nvalues) {
            if ((values = (med_float *) malloc(sizeof(med_float)*nvalues*ncomponent*nintegrationpoint)) == NULL) {
              MESSAGE("ERROR : memory allocation ...");
              return -1;
            }
            if (MEDfieldValueWithProfileRd(fid, fieldname, numdt, numit, MED_STRUCT_ELEMENT, geotype,
                                           MED_COMPACT_PFLMODE, profilename,
                                           MED_FULL_INTERLACE, MED_ALL_CONSTITUENT, 
                                           (unsigned char*) values) < 0) {
              MESSAGE("ERROR : read fields values for cells ..."); 
              free(values);
              return -1; 
            }  
            free(values);
          }
        }
      }
    }

    ret=0;
  ERROR:
    if (nvaratt)
      free(nvaratt);
    if (geotypes)
      free(geotypes);

  }



  if ( MEDfileObjectsUnmount(fid, mfid, MED_MESH_SUPPORT) < 0 ) {
    MESSAGE("ERROR : file unmounting ...");
    ret=-1;
  }

  if ( MEDfileObjectsUnmount(fid, sfid, MED_ELSTRUCT) < 0 ) {
    MESSAGE("ERROR : file unmounting ...");
    ret=-1;
  }


  if ( MEDfileObjectsUnmount(fid, cmfid, MED_MESH) < 0 ) {
    MESSAGE("ERROR : file unmounting ...");
    ret=-1;
  }

  /* close 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