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UsesCase_MEDfield_4.c
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1 /* This file is part of MED.
2  *
3  * COPYRIGHT (C) 1999 - 2023 EDF R&D, CEA/DEN
4  * MED is free software: you can redistribute it and/or modify
5  * it under the terms of the GNU Lesser General Public License as published by
6  * the Free Software Foundation, either version 3 of the License, or
7  * (at your option) any later version.
8  *
9  * MED is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public License
15  * along with MED. If not, see <http://www.gnu.org/licenses/>.
16  */
17 
18 /*
19  * Field use case 4 : write a field with computing steps
20  */
21 
22 
23 #include <med.h>
24 #define MESGERR 1
25 #include <med_utils.h>
26 
27 #include <string.h>
28 
29 
30 int main (int argc, char **argv) {
31  med_idt fid;
32  const char meshname[MED_NAME_SIZE+1] = "2D unstructured mesh";
33  const char fieldname[MED_NAME_SIZE+1] = "TEMPERATURE_FIELD";
34  const med_int ncomponent = 1;
35  const char componentname[MED_SNAME_SIZE+1] = "TEMPERATURE";
36  const char componentunit[MED_SNAME_SIZE+1] = "C";
37  const med_int ntria3 = 8;
38  const med_int nquad4 = 4;
39  const med_float tria3values_step1[8] = {1000., 2000., 3000., 4000.,
40  5000., 6000., 7000., 8000.};
41  const med_float quad4values_step1[4] = {10000., 20000., 30000., 4000.};
42  const med_float tria3values_step2[8] = {1500., 2500., 3500., 4500.,
43  5500., 6500., 7500., 8500.};
44  const med_float quad4values_step2[4] = {15000., 25000., 35000., 45000.};
45  int ret=-1;
46 
47  /* file creation */
48  fid = MEDfileOpen("UsesCase_MEDfield_4.med",MED_ACC_CREAT);
49  if (fid < 0) {
50  MESSAGE("ERROR : file creation ...");
51  goto ERROR;
52  }
53 
54  /* create mesh link */
55  if (MEDlinkWr(fid,meshname,"./UsesCase_MEDmesh_1.med") < 0) {
56  MESSAGE("ERROR : create mesh link ...");
57  goto ERROR;
58  }
59 
60  /* field creation : temperature field : 1 component in celsius degree
61  * the mesh is the 2D unstructured mesh of UsescaseMEDmesh_1.c
62  * use case. Computation step unit in 'ms'
63  */
64  if (MEDfieldCr(fid, fieldname, MED_FLOAT64,
65  ncomponent, componentname, componentunit,"ms", meshname) < 0) {
66  MESSAGE("ERROR : create field");
67  goto ERROR;
68  }
69 
70  /* two computation steps :
71  * - first on meshname MED_NO_DT,MED_NO_IT mesh computation step
72  * - second on meshname 1,3 mesh computation step */
73  /* write values at cell centers : 8 MED_TRIA3 and 4 MED_QUAD4 */
74 
75  /* STEP 1 : dt1 = 5.5, it = 1*/
76  /* MED_TRIA3 */
77  if (MEDfieldValueWr(fid, fieldname, 1, 1, 5.5, MED_CELL, MED_TRIA3, MED_FULL_INTERLACE,
78  MED_ALL_CONSTITUENT, ntria3, (unsigned char*) tria3values_step1) < 0) {
79  MESSAGE("ERROR : write field values on MED_TRIA3");
80  goto ERROR;
81  }
82  /* MED_QUAD4 */
83  if (MEDfieldValueWr(fid, fieldname, 1, 1, 5.5, MED_CELL,MED_QUAD4, MED_FULL_INTERLACE,
84  MED_ALL_CONSTITUENT, nquad4, (unsigned char*) quad4values_step1) < 0) {
85  MESSAGE("ERROR : write field values on MED_QUAD4 ");
86  goto ERROR;
87  }
88 
89  /* STEP 2 : dt2 = 8.9, it = 1*/
90  /* MED_TRIA3 */
91  if (MEDfieldValueWr(fid, fieldname, 2 , 1 , 8.9 , MED_CELL, MED_TRIA3, MED_FULL_INTERLACE,
92  MED_ALL_CONSTITUENT, ntria3, (unsigned char*)tria3values_step2) < 0) {
93  MESSAGE("ERROR : write field values on MED_TRIA3");
94  goto ERROR;
95  }
96 
97  /* MED_QUAD4 */
98  if (MEDfieldValueWr(fid, fieldname, 2, 1, 8.9, MED_CELL, MED_QUAD4, MED_FULL_INTERLACE,
99  MED_ALL_CONSTITUENT, nquad4, (unsigned char*)quad4values_step2) < 0) {
100  MESSAGE("ERROR : write field values on MED_QUAD4 ");
101  goto ERROR;
102  }
103 
104  /* Write associated mesh computation step */
105  if ( MEDfieldComputingStepMeshWr(fid, fieldname, 2, 1,
106  1, 3 ) < 0 ) {
107  MESSAGE("ERROR : write field mesh computation step error ");
108  goto ERROR;
109  }
110 
111  ret=0;
112  ERROR:
113 
114  /* close file */
115  if (MEDfileClose(fid) < 0) {
116  MESSAGE("ERROR : close file ...");
117  ret=-1;
118  }
119 
120  return ret;
121 }
122 
MED_TRIA3
#define MED_TRIA3
Definition: med.h:205
MED_SNAME_SIZE
#define MED_SNAME_SIZE
Definition: med.h:84
med_idt
hid_t med_idt
Definition: med.h:333
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
MESSAGE
#define MESSAGE(chaine)
Definition: med_utils.h:324
MED_FULL_INTERLACE
Definition: med.h:98
med_int
int med_int
Definition: med.h:344
med_float
double med_float
Definition: med.h:338
MEDfileClose
MEDC_EXPORT med_err MEDfileClose(med_idt fid)
Fermeture d'un fichier MED.
Definition: MEDfileClose.c:30
main
int main(int argc, char **argv)
Definition: UsesCase_MEDfield_4.c:30
MED_FLOAT64
Definition: med.h:168
MED_CELL
Definition: med.h:145
MED_NAME_SIZE
#define MED_NAME_SIZE
Definition: med.h:83
MED_ALL_CONSTITUENT
#define MED_ALL_CONSTITUENT
Definition: med.h:301
med_utils.h
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.h
MEDfileOpen
MEDC_EXPORT med_idt MEDfileOpen(const char *const filename, const med_access_mode accessmode)
Ouverture d'un fichier MED.
Definition: MEDfileOpen.c:42
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:125
MED_QUAD4
#define MED_QUAD4
Definition: med.h:206
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