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UsesCase_MEDmesh_10.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 * How to create an unstructured mesh
20 *
21 * Use case 10 : a 2D unstructured mesh with 15 nodes, 8 triangular cells, 4 triangular cells
22 * and families
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 const char meshname[MED_NAME_SIZE+1] = "2D unstructured mesh";
34 const med_int spacedim = 2;
35 const med_int meshdim = 2;
36 const char axisname[2*MED_SNAME_SIZE+1] = "x y ";
37 const char unitname[2*MED_SNAME_SIZE+1] = "cm cm ";
38 const 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 const med_int nnodes = 15;
42 const 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 const med_int ntria3 = 8;
45 const med_int quadconnectivity[16] = {3,4,9,8, 4,5,10,9,
46 15,14,9,10, 13,8,9,14};
47 const med_int nquad4 = 4;
48 const char familyname[MED_NAME_SIZE+1] = "BOUNDARY_VERTICES";
49 const char groupname[MED_LNAME_SIZE+1] = "MESH_BOUNDARY_VERTICES";
50 const med_int familynumbers[15] = { 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1 };
51 int ret=-1;
52
53 /* open MED file */
54 fid = MEDfileOpen("UsesCase_MEDmesh_10.med",MED_ACC_CREAT);
55 if (fid < 0) {
56 MESSAGE("ERROR : file creation ...");
57 goto ERROR;
58 }
59
60 /* write a comment in the file */
61 if (MEDfileCommentWr(fid,"A 2D unstructured mesh : 15 nodes, 12 cells") < 0) {
62 MESSAGE("ERROR : write file description ...");
63 goto ERROR;
64 }
65
66 /* mesh creation : a 2D unstructured mesh */
67 if (MEDmeshCr(fid, meshname, spacedim, meshdim, MED_UNSTRUCTURED_MESH,
68 "A 2D unstructured mesh","",MED_SORT_DTIT,MED_CARTESIAN, axisname, unitname) < 0) {
69 MESSAGE("ERROR : mesh creation ...");
70 goto ERROR;
71 }
72
73 /* nodes coordinates in a cartesian axis in full interlace mode
74 (X1,Y1, X2,Y2, X3,Y3, ...) with no iteration and computation step
75 */
76 if (MEDmeshNodeCoordinateWr(fid, meshname, MED_NO_DT, MED_NO_IT, 0.0,
77 MED_FULL_INTERLACE, nnodes, coordinates) < 0) {
78 MESSAGE("ERROR : nodes coordinates ...");
79 goto ERROR;
80 }
81
82 /* cells connectiviy is defined in nodal mode */
83 if (MEDmeshElementConnectivityWr(fid, meshname, MED_NO_DT, MED_NO_IT, 0.0, MED_CELL, MED_TRIA3,
84 MED_NODAL, MED_FULL_INTERLACE, ntria3, triaconnectivity) < 0) {
85 MESSAGE("ERROR : triangular cells connectivity ...");
86 goto ERROR;
87 }
88
89 if (MEDmeshElementConnectivityWr(fid, meshname, MED_NO_DT, MED_NO_IT, 0.0, MED_CELL, MED_QUAD4,
90 MED_NODAL, MED_FULL_INTERLACE, nquad4, quadconnectivity) < 0) {
91 MESSAGE("ERROR : quadrangular cells connectivity ...");
92 goto ERROR;
93 }
94
95 /* create family 0 : by default, all mesh entities family number is 0 */
96 if (MEDfamilyCr(fid, meshname,MED_NO_NAME, 0, 0, MED_NO_GROUP) < 0) {
97 MESSAGE("ERROR : family creation ...");
98 goto ERROR;
99 }
100
101 /* create a family for boundary vertices : by convention a nodes family number is > 0,
102 and an element family number is < 0 */
103 if (MEDfamilyCr(fid, meshname,familyname, 1, 1, groupname) < 0) {
104 MESSAGE("ERROR : family creation ...");
105 goto ERROR;
106 }
107
108 /* write family number for nodes */
109 if (MEDmeshEntityFamilyNumberWr(fid, meshname, MED_NO_DT, MED_NO_IT,
110 MED_NODE, MED_NONE, nnodes, familynumbers) < 0) {
111 MESSAGE("ERROR : nodes family numbers ...");
112 goto ERROR;
113 }
114
115 ret=0;
116 ERROR:
117
118 /* close MED file */
119 if (MEDfileClose(fid) < 0) {
120 MESSAGE("ERROR : close file ...");
121 ret=-1;
122 }
123
124 return ret;
125 }
MED_CARTESIAN
Definition: med.h:258
MED_NO_GROUP
#define MED_NO_GROUP
Definition: med.h:289
MED_TRIA3
#define MED_TRIA3
Definition: med.h:203
MED_FULL_INTERLACE
Definition: med.h:96
MED_SORT_DTIT
Definition: med.h:309
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
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_NODAL
Definition: med.h:255
med_idt
hid_t med_idt
Definition: med.h:331
MEDmeshEntityFamilyNumberWr
MEDC_EXPORT med_err MEDmeshEntityFamilyNumberWr(const med_idt fid, const char *const meshname, const med_int numdt, const med_int numit, const med_entity_type entitype, const med_geometry_type geotype, const med_int nentity, const med_int *const number)
Cette routine permet l'écriture des numéros de famille d'un type d'entité d'un maillage.
Definition: MEDmeshEntityFamilyNumberWr.c:39
MED_CELL
Definition: med.h:143
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
MESSAGE
#define MESSAGE(chaine)
Definition: med_utils.h:324
med_int
int med_int
Definition: med.h:342
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.h
med_float
double med_float
Definition: med.h:336
MED_NO_DT
#define MED_NO_DT
Definition: med.h:320
MED_NONE
#define MED_NONE
Definition: med.h:231
MED_NODE
Definition: med.h:143
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,...
Definition: MEDmeshNodeCoordinateWr.c:45
MED_ACC_CREAT
Definition: med.h:123
MED_LNAME_SIZE
#define MED_LNAME_SIZE
Definition: med.h:83
MED_NAME_SIZE
#define MED_NAME_SIZE
Definition: med.h:81
MED_UNSTRUCTURED_MESH
Definition: med.h:131
MEDfileClose
MEDC_EXPORT med_err MEDfileClose(med_idt fid)
Fermeture d'un fichier MED.
Definition: MEDfileClose.c:30
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
main
int main(int argc, char **argv)
Definition: UsesCase_MEDmesh_10.c:31
MED_NO_IT
#define MED_NO_IT
Definition: med.h:321
med_utils.h
MED_QUAD4
#define MED_QUAD4
Definition: med.h:204
MED_NO_NAME
#define MED_NO_NAME
Definition: med.h:268