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UsesCase_MEDfield_4.c
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1 /* This file is part of MED.
2 *
3 * COPYRIGHT (C) 1999 - 2021 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
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
main
int main(int argc, char **argv)
Definition: UsesCase_MEDfield_4.c:30
MED_FLOAT64
Definition: med.h:166
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