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UsesCase_MEDmesh_3.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 /*
20 * Use case 3 : read an unstructured mesh : generic approach
21 */
22
23
24 #include <med.h>
25 #define MESGERR 1
26 #include <med_utils.h>
27
28 #include <string.h>
29
30 int main (int argc, char **argv) {
31 med_idt fid;
32 char meshname[MED_NAME_SIZE+1]="";
33 char meshdescription[MED_COMMENT_SIZE+1]="";
34 med_int meshdim=0;
35 med_int spacedim=0;
36 med_sorting_type sortingtype;
37 med_int nstep;
38 med_mesh_type meshtype;
39 med_axis_type axistype;
40 char *axisname="";
41 char *unitname="";
42 char dtunit[MED_SNAME_SIZE+1]="";
43 med_float *coordinates = NULL;
44 med_int nnodes = 0;
45 med_int ngeo = 0;
46 med_int nelt=0;
47 med_int *connectivity = NULL;
48 med_bool coordinatechangement;
49 med_bool geotransformation;
50 med_int i, j, it, nmesh;
51 med_geometry_type geotype;
52 med_geometry_type *geotypes = MED_GET_CELL_GEOMETRY_TYPE;
53 char geotypename[MED_NAME_SIZE+1];
54 int ret=-1;
55
56
57 /* open MED file with READ ONLY access mode */
58 fid = MEDfileOpen("UsesCase_MEDmesh_1.med",MED_ACC_RDONLY);
59 if (fid < 0) {
60 MESSAGE("ERROR : open file in READ ONLY ACCESS mode ...");
61 goto ERROR;
62 }
63
64 /* read how many mesh in the file */
65 if ((nmesh = MEDnMesh(fid)) < 0) {
66 MESSAGE("ERROR : read how many mesh ...");
67 goto ERROR;
68 }
69
70 for (i=0;i<nmesh;i++) {
71
72 /* read computation space dimension */
73 if ((spacedim = MEDmeshnAxis(fid, i+1)) < 0) {
74 MESSAGE("ERROR : read computation space dimension ...");
75 goto ERROR;
76 }
77
78 /* memory allocation */
79 if ((axisname = (char*) malloc(MED_SNAME_SIZE*spacedim+1)) == NULL) {
80 MESSAGE("ERROR : memory allocation ...");
81 goto ERROR;
82 }
83 if ((unitname = (char*) malloc(MED_SNAME_SIZE*spacedim+1)) == NULL) {
84 MESSAGE("ERROR : memory allocation ...");
85 goto ERROR;
86 }
87
88 /* read mesh informations : meshname, mesh dimension, mesh type ... */
89 if (MEDmeshInfo(fid, i+1, meshname, &spacedim, &meshdim, &meshtype, meshdescription,
90 dtunit, &sortingtype, &nstep, &axistype, axisname, unitname) < 0) {
91 MESSAGE("ERROR : mesh info ...");
92 free(axisname); free(unitname);
93 goto ERROR;
94 }
95
96 free(axisname);
97 free(unitname);
98
99 /* read how many nodes in the mesh */
100 if ((nnodes = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT, MED_NODE, MED_NO_GEOTYPE,
101 MED_COORDINATE, MED_NO_CMODE,&coordinatechangement,
102 &geotransformation)) < 0) {
103 MESSAGE("ERROR : number of nodes ...");
104 goto ERROR;
105 }
106
107 /* read mesh nodes coordinates */
108 if ((coordinates = (med_float*) malloc(sizeof(med_float)*nnodes*spacedim)) == NULL) {
109 MESSAGE("ERROR : memory allocation ...");
110 goto ERROR;
111 }
112
113 if (MEDmeshNodeCoordinateRd(fid, meshname, MED_NO_DT, MED_NO_IT, MED_FULL_INTERLACE,
114 coordinates) < 0) {
115 MESSAGE("ERROR : nodes coordinates ...");
116 free(coordinates);
117 goto ERROR;
118 }
119
120 if (coordinates)
121 free(coordinates);
122
123 /* read number of geometrical types for cells */
124 if ((ngeo = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,MED_GEO_ALL,
125 MED_CONNECTIVITY, MED_NODAL,&coordinatechangement,
126 &geotransformation)) < 0) {
127 MESSAGE("ERROR : number of geo type ...");
128 ISCRUTE_int(geotype);
129 goto ERROR;
130 }
131
132 for (it=1; it<=ngeo; it++) {
133
134 /* get geometry type */
135 if (MEDmeshEntityInfo(fid, meshname, MED_NO_DT, MED_NO_IT,MED_CELL,it,
136 geotypename,&geotype) < 0) {
137 MESSAGE("ERROR : get geo type ...");
138 ISCRUTE(it);
139 goto ERROR;
140 }
141
142 /* how many cells of type geotype ? */
143 if ((nelt = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,geotype,
144 MED_CONNECTIVITY, MED_NODAL,&coordinatechangement,
145 &geotransformation)) < 0) {
146 MESSAGE("ERROR : number of cell ...");
147 goto ERROR;
148 }
149
150 /* read cells connectivity in the mesh */
151 if ((connectivity = (med_int *) malloc(sizeof(med_int)*nelt*(geotype%100))) == NULL) {
152 MESSAGE("ERROR : memory allocation ...");
153 goto ERROR;
154 }
155
156 if (MEDmeshElementConnectivityRd(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,
157 geotype, MED_NODAL, MED_FULL_INTERLACE, connectivity) < 0) {
158 MESSAGE("ERROR : cell connectivity ...");
159 ISCRUTE_int(geotype);
160 free(connectivity);
161 goto ERROR;
162 }
163
164 /* memory deallocation */
165 if (connectivity) {
166 free(connectivity);
167 connectivity = NULL;
168 }
169
170
171 }
172
173 }
174
175 /*
176 * ... we know that the family number of nodes and elements is 0, a real code would check ...
177 */
178 ret=0;
179 ERROR:
180
181 /* close MED file */
182 if (MEDfileClose(fid) < 0) {
183 MESSAGE("ERROR : close file");
184 ret=-1;
185 }
186
187 return ret;
188 }
189
MED_ACC_RDONLY
Definition: med.h:122
MED_COMMENT_SIZE
#define MED_COMMENT_SIZE
Definition: med.h:81
med_geometry_type
int med_geometry_type
Definition: med.h:196
MED_SNAME_SIZE
#define MED_SNAME_SIZE
Definition: med.h:84
ISCRUTE_int
#define ISCRUTE_int(entier)
Definition: med_utils.h:314
MEDnMesh
MEDC_EXPORT med_int MEDnMesh(const med_idt fid)
Cette routine permet de lire le nombre de maillages dans un fichier.
Definition: MEDnMesh.c:34
med_idt
hid_t med_idt
Definition: med.h:333
MED_NO_GEOTYPE
#define MED_NO_GEOTYPE
Definition: med.h:234
MEDmeshEntityInfo
MEDC_EXPORT med_err MEDmeshEntityInfo(const med_idt fid, const char *const meshname, const med_int numdt, const med_int numit, const med_entity_type entitype, const int geotypeit, char *const geotypename, med_geometry_type *const geotype)
Cette routine indique de façon itérative les types géométriques disponibles dans un maillage.
Definition: MEDmeshEntityInfo.c:41
med_sorting_type
med_sorting_type
Definition: med.h:311
MEDmeshInfo
MEDC_EXPORT med_err MEDmeshInfo(const med_idt fid, const int meshit, char *const meshname, med_int *const spacedim, med_int *const meshdim, med_mesh_type *const meshtype, char *const description, char *const dtunit, med_sorting_type *const sortingtype, med_int *const nstep, med_axis_type *const axistype, char *const axisname, char *const axisunit)
Cette routine permet de lire les informations relatives à un maillage dans un fichier.
Definition: MEDmeshInfo.c:43
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_GET_CELL_GEOMETRY_TYPE
med_geometry_type MED_GET_CELL_GEOMETRY_TYPE[MED_N_CELL_FIXED_GEO+2]
Definition: MEDiterators.c:55
ISCRUTE
#define ISCRUTE(entier)
Definition: med_utils.h:313
med_bool
med_bool
Definition: med.h:262
MEDmeshnEntity
MEDC_EXPORT med_int MEDmeshnEntity(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_data_type datatype, const med_connectivity_mode cmode, med_bool *const changement, med_bool *const transformation)
Cette routine permet de lire le nombre d'entités dans un maillage pour une étape de calcul donnée.
Definition: MEDmeshnEntity.c:44
med_float
double med_float
Definition: med.h:338
MED_COORDINATE
Definition: med.h:151
MED_NO_CMODE
Definition: med.h:257
MED_GEO_ALL
#define MED_GEO_ALL
Definition: med.h:238
MED_NO_DT
#define MED_NO_DT
Definition: med.h:322
MEDfileClose
MEDC_EXPORT med_err MEDfileClose(med_idt fid)
Fermeture d'un fichier MED.
Definition: MEDfileClose.c:30
med_mesh_type
med_mesh_type
Definition: med.h:133
MED_CELL
Definition: med.h:145
MED_NAME_SIZE
#define MED_NAME_SIZE
Definition: med.h:83
med_utils.h
MED_NODE
Definition: med.h:145
med_axis_type
med_axis_type
Definition: med.h:260
med.h
main
int main(int argc, char **argv)
Definition: UsesCase_MEDmesh_3.c:30
MED_CONNECTIVITY
Definition: med.h:151
MED_NO_IT
#define MED_NO_IT
Definition: med.h:323
MEDmeshnAxis
MEDC_EXPORT med_int MEDmeshnAxis(const med_idt fid, const int meshit)
Cette routine permet de lire dans un maillage le nombre d'axes du repère des coordonnées des noeuds.
Definition: MEDmeshnAxis.c:35
MEDfileOpen
MEDC_EXPORT med_idt MEDfileOpen(const char *const filename, const med_access_mode accessmode)
Ouverture d'un fichier MED.
Definition: MEDfileOpen.c:42
MEDmeshNodeCoordinateRd
MEDC_EXPORT med_err MEDmeshNodeCoordinateRd(const med_idt fid, const char *const meshname, const med_int numdt, const med_int numit, const med_switch_mode switchmode, med_float *const coordinates)
Cette routine permet de lire dans un maillage le tableau des coordonnées des noeuds,...
Definition: MEDmeshNodeCoordinateRd.c:37
MED_NODAL
Definition: med.h:257
MEDmeshElementConnectivityRd
MEDC_EXPORT med_err MEDmeshElementConnectivityRd(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_connectivity_mode cmode, const med_switch_mode switchmode, med_int *const connectivity)
Cette routine permet de lire dans un maillage le tableau des connectivités pour un type géométrique d...
Definition: MEDmeshElementConnectivityRd.c:40