usecases/c/UsesCase_MEDfield_4.c
/* This file is part of MED.
*
* COPYRIGHT (C) 1999 - 2021 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/>.
*/
/*
* Field use case 4 : write a field with computing steps
*/
#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 char fieldname[MED_NAME_SIZE+1] = "TEMPERATURE_FIELD";
const med_int ncomponent = 1;
const char componentname[MED_SNAME_SIZE+1] = "TEMPERATURE";
const char componentunit[MED_SNAME_SIZE+1] = "C";
const med_int ntria3 = 8;
const med_int nquad4 = 4;
const med_float tria3values_step1[8] = {1000., 2000., 3000., 4000.,
5000., 6000., 7000., 8000.};
const med_float quad4values_step1[4] = {10000., 20000., 30000., 4000.};
const med_float tria3values_step2[8] = {1500., 2500., 3500., 4500.,
5500., 6500., 7500., 8500.};
const med_float quad4values_step2[4] = {15000., 25000., 35000., 45000.};
int ret=-1;
/* file creation */
fid = MEDfileOpen("UsesCase_MEDfield_4.med",MED_ACC_CREAT);
if (fid < 0) {
MESSAGE("ERROR : file creation ...");
goto ERROR;
}
/* create mesh link */
if (MEDlinkWr(fid,meshname,"./UsesCase_MEDmesh_1.med") < 0) {
MESSAGE("ERROR : create mesh link ...");
goto ERROR;
}
/* field creation : temperature field : 1 component in celsius degree
* the mesh is the 2D unstructured mesh of UsescaseMEDmesh_1.c
* use case. Computation step unit in 'ms'
*/
if (MEDfieldCr(fid, fieldname, MED_FLOAT64,
ncomponent, componentname, componentunit,"ms", meshname) < 0) {
MESSAGE("ERROR : create field");
goto ERROR;
}
/* two computation steps :
* - first on meshname MED_NO_DT,MED_NO_IT mesh computation step
* - second on meshname 1,3 mesh computation step */
/* write values at cell centers : 8 MED_TRIA3 and 4 MED_QUAD4 */
/* STEP 1 : dt1 = 5.5, it = 1*/
/* MED_TRIA3 */
if (MEDfieldValueWr(fid, fieldname, 1, 1, 5.5, MED_CELL, MED_TRIA3, MED_FULL_INTERLACE,
MED_ALL_CONSTITUENT, ntria3, (unsigned char*) tria3values_step1) < 0) {
MESSAGE("ERROR : write field values on MED_TRIA3");
goto ERROR;
}
/* MED_QUAD4 */
if (MEDfieldValueWr(fid, fieldname, 1, 1, 5.5, MED_CELL,MED_QUAD4, MED_FULL_INTERLACE,
MED_ALL_CONSTITUENT, nquad4, (unsigned char*) quad4values_step1) < 0) {
MESSAGE("ERROR : write field values on MED_QUAD4 ");
goto ERROR;
}
/* STEP 2 : dt2 = 8.9, it = 1*/
/* MED_TRIA3 */
if (MEDfieldValueWr(fid, fieldname, 2 , 1 , 8.9 , MED_CELL, MED_TRIA3, MED_FULL_INTERLACE,
MED_ALL_CONSTITUENT, ntria3, (unsigned char*)tria3values_step2) < 0) {
MESSAGE("ERROR : write field values on MED_TRIA3");
goto ERROR;
}
/* MED_QUAD4 */
if (MEDfieldValueWr(fid, fieldname, 2, 1, 8.9, MED_CELL, MED_QUAD4, MED_FULL_INTERLACE,
MED_ALL_CONSTITUENT, nquad4, (unsigned char*)quad4values_step2) < 0) {
MESSAGE("ERROR : write field values on MED_QUAD4 ");
goto ERROR;
}
/* Write associated mesh computation step */
if ( MEDfieldComputingStepMeshWr(fid, fieldname, 2, 1,
1, 3 ) < 0 ) {
MESSAGE("ERROR : write field mesh computation step error ");
goto ERROR;
}
ret=0;
ERROR:
/* close file */
if (MEDfileClose(fid) < 0) {
MESSAGE("ERROR : close file ...");
ret=-1;
}
return ret;
}
MEDfieldCr
MEDC_EXPORT med_err MEDfieldCr(const med_idt fid, const char *const fieldname, const med_field_type fieldtype, const med_int ncomponent, const char *const componentname, const char *const componentunit, const char *const dtunit, const char *const meshname)
Cette fonction crée un champ dans un fichier.
Definition: MEDfieldCr.c:44
MED_TRIA3
#define MED_TRIA3
Definition: med.h:203
MED_FULL_INTERLACE
Definition: med.h:96
MEDfileOpen
MEDC_EXPORT med_idt MEDfileOpen(const char *const filename, const med_access_mode accessmode)
Ouverture d'un fichier MED.
Definition: MEDfileOpen.c:42
MED_SNAME_SIZE
#define MED_SNAME_SIZE
Definition: med.h:82
med_idt
hid_t med_idt
Definition: med.h:331
MED_CELL
Definition: med.h:143
MESSAGE
#define MESSAGE(chaine)
Definition: med_utils.h:324
MEDlinkWr
MEDC_EXPORT med_err MEDlinkWr(const med_idt fid, const char *const meshname, const char *const link)
Cette routine permet d'écrire un lien dans un fichier MED.
Definition: MEDlinkWr.c:36
med_int
int med_int
Definition: med.h:342
med.h
med_float
double med_float
Definition: med.h:336
MEDfieldComputingStepMeshWr
MEDC_EXPORT med_err MEDfieldComputingStepMeshWr(const med_idt fid, const char *const fieldname, const med_int numdt, const med_int numit, const med_int meshnumdt, const med_int meshnumit)
Cette fonction permet de définir l'étape de calcul ( meshnumdit , meshnumit ) à utiliser pour le mail...
Definition: MEDfieldComputingStepMeshWr.c:36
MED_ACC_CREAT
Definition: med.h:123
MED_NAME_SIZE
#define MED_NAME_SIZE
Definition: med.h:81
MEDfileClose
MEDC_EXPORT med_err MEDfileClose(med_idt fid)
Fermeture d'un fichier MED.
Definition: MEDfileClose.c:30
MED_ALL_CONSTITUENT
#define MED_ALL_CONSTITUENT
Definition: med.h:299
MED_FLOAT64
Definition: med.h:166
main
int main(int argc, char **argv)
Definition: 3.0.8/test10.c:50
med_utils.h
MEDfieldValueWr
MEDC_EXPORT med_err MEDfieldValueWr(const med_idt fid, const char *const fieldname, const med_int numdt, const med_int numit, const med_float dt, const med_entity_type entitype, const med_geometry_type geotype, const med_switch_mode switchmode, const med_int componentselect, const med_int nentity, const unsigned char *const value)
Cette fonction permet d'écrire les valeurs d'un champ définies sur des entités d'un maillage pour une...
Definition: MEDfieldValueWr.c:44
MED_QUAD4
#define MED_QUAD4
Definition: med.h:204