MED fichier: Fichier source de MEDmesh_13.c

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MEDmesh_13.c
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1 /* This file is part of MED.
2 *
3 * COPYRIGHT (C) 1999 - 2017 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 * How to create an unstructured mesh
20 *
21 * Use case 1 : a 2D unstructured mesh with 15 nodes, 8 triangular cells, 4 triangular cells
22 * - Computation step : NO.
23 */
24
25 #include <med.h>
26 #define MESGERR 1
27 #include <med_utils.h>
28
29 #include <string.h>
30
31 int main (int argc, char **argv) {
32 med_idt fid;
33 char meshname[MED_NAME_SIZE+1] = "2D unstructured mesh";
34 med_int spacedim = 2;
35 med_int meshdim = 2;
36 char axisname[2*MED_SNAME_SIZE+1] = "x y ";
37 char unitname[2*MED_SNAME_SIZE+1] = "cm cm ";
38 med_float coordinates[30] = { 2.,1., 7.,1., 12.,1., 17.,1., 22.,1.,
39 2.,6., 7.,6., 12.,6., 17.,6., 22.,6.,
40 2.,11., 7.,11., 12.,11., 17.,11., 22.,11.};
41 med_int nnodes = 15;
42 med_int triaconnectivity[24] = { 1,7,6, 2,7,1, 3,7,2, 8,7,3,
43 13,7,8, 12,7,13, 11,7,12, 6,7,11 };
44 med_int ntria3 = 8;
45 med_int quadconnectivity[16] = {3,4,9,8, 4,5,10,9,
46 15,14,9,10, 13,8,9,14};
47 med_int nquad4 = 4;
48
49 /* open MED file */
50 fid = MEDfileOpen("UsesCase_MEDmesh_1.med",MED_ACC_CREAT);
51 if (fid < 0) {
52 MESSAGE("ERROR : file creation ...");
53 return -1;
54 }
55
56 /* write a comment in the file */
57 if (MEDfileCommentWr(fid,"A 2D unstructured mesh : 15 nodes, 12 cells") < 0) {
58 MESSAGE("ERROR : write file description ...");
59 return -1;
60 }
61
62 /* mesh creation : a 2D unstructured mesh */
63 if (MEDmeshCr(fid, meshname, spacedim, meshdim, MED_UNSTRUCTURED_MESH,
64 "A 2D unstructured mesh","",MED_SORT_DTIT,MED_CARTESIAN, axisname, unitname) < 0) {
65 MESSAGE("ERROR : mesh creation ...");
66 return -1;
67 }
68
69 /* nodes coordinates in a cartesian axis in full interlace mode
70 (X1,Y1, X2,Y2, X3,Y3, ...) with no iteration and computation step
71 */
72 if (MEDmeshNodeCoordinateWr(fid, meshname, MED_NO_DT, MED_NO_IT, 0.0,
73 MED_FULL_INTERLACE, nnodes, coordinates) < 0) {
74 MESSAGE("ERROR : nodes coordinates ...");
75 return -1;
76 }
77
78 /* cells connectiviy is defined in nodal mode */
79 if (MEDmeshElementConnectivityWr(fid, meshname, MED_NO_DT, MED_NO_IT, 0.0, MED_CELL, MED_TRIA3,
80 MED_NODAL, MED_FULL_INTERLACE, ntria3, triaconnectivity) < 0) {
81 MESSAGE("ERROR : triangular cells connectivity ...");
82 return -1;
83 }
84
85 if (MEDmeshElementConnectivityWr(fid, meshname, MED_NO_DT, MED_NO_IT, 0.0, MED_CELL, MED_QUAD4,
86 MED_NODAL, MED_FULL_INTERLACE, nquad4, quadconnectivity) < 0) {
87 MESSAGE("ERROR : quadrangular cells connectivity ...");
88 return -1;
89 }
90
91 /* create family 0 : by default, all mesh entities family number is 0 */
92 if (MEDfamilyCr(fid, meshname,"", 0, 0, "") < 0) {
93 MESSAGE("ERROR : quadrangular cells connectivity ...");
94 return -1;
95 }
96
97 /* close MED file */
98 if (MEDfileClose(fid) < 0) {
99 MESSAGE("ERROR : close file ...");
100 return -1;
101 }
102
103 return 0;
104 }
MED_QUAD4
#define MED_QUAD4
Definition: med.h:199
MEDfileClose
MEDC_EXPORT med_err MEDfileClose(med_idt fid)
Fermeture d'un fichier MED.
Definition: MEDfileClose.c:30
MED_TRIA3
#define MED_TRIA3
Definition: med.h:198
MED_CARTESIAN
Definition: med.h:253
MED_FULL_INTERLACE
Definition: med.h:92
MED_NO_IT
#define MED_NO_IT
Definition: med.h:314
MED_SORT_DTIT
Definition: med.h:304
MESSAGE
#define MESSAGE(chaine)
Definition: med_utils.h:316
med_float
double med_float
Definition: med.h:329
MED_CELL
Definition: med.h:139
MED_UNSTRUCTURED_MESH
Definition: med.h:127
med.h
MEDfamilyCr
MEDC_EXPORT med_err MEDfamilyCr(const med_idt fid, const char *const meshname, const char *const familyname, const med_int familynumber, const med_int ngroup, const char *const groupname)
Cette routine permet la création d'une famille portant sur les entités d'un maillage.
Definition: MEDfamilyCr.c:40
MED_NODAL
Definition: med.h:250
med_int
int med_int
Definition: med.h:335
MEDmeshElementConnectivityWr
MEDC_EXPORT med_err MEDmeshElementConnectivityWr(const med_idt fid, const char *const meshname, const med_int numdt, const med_int numit, const med_float dt, const med_entity_type entitype, const med_geometry_type geotype, const med_connectivity_mode cmode, const med_switch_mode switchmode, const med_int nentity, const med_int *const connectivity)
Cette routine permet d'écrire dans un maillage le tableau des connectivités pour un type géométrique ...
Definition: MEDmeshElementConnectivityWr.c:42
MEDmeshCr
MEDC_EXPORT med_err MEDmeshCr(const med_idt fid, const char *const meshname, const med_int spacedim, const med_int meshdim, const med_mesh_type meshtype, const char *const description, const char *const dtunit, const med_sorting_type sortingtype, const med_axis_type axistype, const char *const axisname, const char *const axisunit)
Cette routine permet de créer un maillage dans un fichier.
Definition: MEDmeshCr.c:45
main
int main(int argc, char **argv)
Definition: MEDmesh_13.c:31
MEDfileOpen
MEDC_EXPORT med_idt MEDfileOpen(const char *const filename, const med_access_mode accessmode)
Ouverture d'un fichier MED.
Definition: MEDfileOpen.c:41
MEDfileCommentWr
MEDC_EXPORT med_err MEDfileCommentWr(const med_idt fid, const char *const comment)
Ecriture d'un descripteur dans un fichier MED.
Definition: MEDfileCommentWr.c:34
med_idt
hid_t med_idt
Definition: med.h:324
MED_NO_DT
#define MED_NO_DT
Definition: med.h:313
MED_NAME_SIZE
#define MED_NAME_SIZE
Definition: med.h:77
med_utils.h
MED_SNAME_SIZE
#define MED_SNAME_SIZE
Definition: med.h:78
MED_ACC_CREAT
Definition: med.h:119
MEDmeshNodeCoordinateWr
MEDC_EXPORT med_err MEDmeshNodeCoordinateWr(const med_idt fid, const char *const meshname, const med_int numdt, const med_int numit, const med_float dt, const med_switch_mode switchmode, const med_int nentity, const med_float *const coordinates)
Cette routine permet d'écrire dans un maillage le tableau des coordonnées des noeuds, selon une séquence de calcul donnée.
Definition: MEDmeshNodeCoordinateWr.c:45