UsesCase_MEDfield_2.c

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00001 /*  This file is part of MED.
00002  *
00003  *  COPYRIGHT (C) 1999 - 2015  EDF R&D, CEA/DEN
00004  *  MED is free software: you can redistribute it and/or modify
00005  *  it under the terms of the GNU Lesser General Public License as published by
00006  *  the Free Software Foundation, either version 3 of the License, or
00007  *  (at your option) any later version.
00008  *
00009  *  MED is distributed in the hope that it will be useful,
00010  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  *  GNU Lesser General Public License for more details.
00013  *
00014  *  You should have received a copy of the GNU Lesser General Public License
00015  *  along with MED.  If not, see <http://www.gnu.org/licenses/>.
00016  */
00017 
00018 /* 
00019  * Field use case 2 : read the field of use case 1
00020  */
00021 
00022 
00023 #include <med.h>
00024 #define MESGERR 1
00025 #include <med_utils.h>
00026 
00027 #include <string.h>
00028 
00029 int main (int argc, char **argv) {
00030   med_idt fid;
00031   char meshname[MED_NAME_SIZE+1]="";
00032   med_bool localmesh;
00033   const char fieldname[MED_NAME_SIZE+1] = "TEMPERATURE_FIELD";
00034   med_field_type fieldtype;
00035   char componentname[MED_SNAME_SIZE+1]="";
00036   char componentunit[MED_SNAME_SIZE+1]="";
00037   char dtunit[MED_SNAME_SIZE+1]="";
00038   med_float *verticesvalues = NULL;
00039   med_float *tria3values = NULL;
00040   med_float *quad4values = NULL;
00041   med_int nstep, nvalues;
00042   const med_int ncomponent = 1;
00043   int ret=-1;
00044 
00045   /* file creation */
00046   fid = MEDfileOpen("UsesCase_MEDfield_1.med",MED_ACC_RDONLY);
00047   if (fid < 0) {
00048     MESSAGE("ERROR : open file ...");
00049     goto ERROR;
00050   }
00051 
00052   /* 
00053    * ... we know that the MED file has only one field with one component , 
00054    * a real code working would check ... 
00055    */
00056 
00057   /*
00058    * if you know the field name, direct access to field informations
00059    */
00060   if (MEDfieldInfoByName(fid, fieldname, meshname, &localmesh, &fieldtype,
00061                          componentname, componentunit, dtunit, &nstep) < 0) {
00062     MESSAGE("ERROR : Field info by name ...");
00063     goto ERROR;
00064   } 
00065   
00066   /* 
00067    * ... we know that the field values are defined on vertices and MED_TRIA3 
00068    * and MED_QUAD4 cells, a real code working would check ... 
00069    */
00070 
00071   /* MED_NODE */
00072   if ((nvalues = MEDfieldnValue(fid, fieldname, MED_NO_DT, MED_NO_IT, MED_NODE, MED_NONE)) < 0) {
00073     MESSAGE("ERROR : read number of values ...");
00074     goto ERROR;
00075   }
00076 
00077   if ((verticesvalues = (med_float *) malloc(sizeof(med_float)*nvalues*ncomponent)) == NULL) {
00078     MESSAGE("ERROR : memory allocation ...");
00079     goto ERROR;
00080   }
00081   if (MEDfieldValueRd(fid, fieldname, MED_NO_DT, MED_NO_IT, MED_NODE, MED_NONE,
00082                       MED_FULL_INTERLACE, MED_ALL_CONSTITUENT, (unsigned char*) verticesvalues) < 0) {
00083     MESSAGE("ERROR : read fields values on vertices ...");
00084     free(verticesvalues);
00085     goto ERROR;
00086   }
00087   free(verticesvalues);
00088   
00089   /* MED_TRIA3 */
00090   if ((nvalues = MEDfieldnValue(fid, fieldname, MED_NO_DT, MED_NO_IT, MED_CELL, 
00091                                 MED_TRIA3)) < 0) {
00092     MESSAGE("ERROR : read number of values ...");
00093     goto ERROR;
00094   }
00095   if ((tria3values = (med_float *) malloc(sizeof(med_float)*nvalues*ncomponent)) == NULL) {
00096     MESSAGE("ERROR : memory allocation ...");
00097     goto ERROR;
00098   }
00099   if (MEDfieldValueRd(fid, fieldname, MED_NO_DT, MED_NO_IT, MED_CELL, MED_TRIA3,
00100                       MED_FULL_INTERLACE, MED_ALL_CONSTITUENT, (unsigned char*) tria3values) < 0) {
00101     MESSAGE("ERROR : read fields values for MED_TRIA3 cells ...");
00102     free(tria3values);
00103     goto ERROR;
00104   }
00105   free(tria3values);
00106 
00107   /* MED_QUAD4 */
00108   if ((nvalues = MEDfieldnValue(fid, fieldname, MED_NO_DT, MED_NO_IT, MED_CELL, 
00109                                 MED_QUAD4)) < 0) {
00110     MESSAGE("ERROR : read number of values ...");
00111     goto ERROR;
00112   }
00113   if ((quad4values = (med_float *) malloc(sizeof(med_float)*nvalues*ncomponent)) == NULL) {
00114     MESSAGE("ERROR : memory allocation ...");
00115     goto ERROR;
00116   }
00117   if (MEDfieldValueRd(fid, fieldname, MED_NO_DT, MED_NO_IT, MED_CELL, MED_QUAD4,
00118                       MED_FULL_INTERLACE, MED_ALL_CONSTITUENT, (unsigned char*) quad4values) < 0) {
00119     MESSAGE("ERROR : read fields values for MED_QUAD4 cells ...");
00120     free(quad4values);
00121     goto ERROR;
00122   }  
00123   free(quad4values);
00124 
00125   ret=0;
00126  ERROR:
00127 
00128   /* close file */
00129   if (MEDfileClose(fid) < 0) {
00130     MESSAGE("ERROR : close file ...");
00131     ret=-1;
00132   } 
00133 
00134   return ret;
00135 }

Généré le Thu Oct 8 14:26:17 2015 pour MED fichier par  doxygen 1.6.1