MED fichier

UsesCase_MEDmesh_11.c
Aller à la documentation de ce fichier.
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 * Use case 11 : read a 2D unstructured mesh with 15 nodes, 8 triangular cells, 4 quadragular cells with
20 * nodes families
21 */
22
23 #include <med.h>
24 #define MESGERR 1
25 #include <med_utils.h>
26
27 #include <string.h>
28
29 int main (int argc, char **argv) {
30 med_idt fid;
31 const char meshname[MED_NAME_SIZE+1] = "2D unstructured mesh";
32 char meshdescription[MED_COMMENT_SIZE+1]="";
33 med_int meshdim;
34 med_int spacedim;
35 med_sorting_type sortingtype;
36 med_int nstep;
37 med_mesh_type meshtype;
38 med_axis_type axistype;
39 char axisname[2*MED_SNAME_SIZE+1]="";
40 char unitname[2*MED_SNAME_SIZE+1]="";
41 char dtunit[MED_SNAME_SIZE+1];
42 med_float *coordinates = NULL;
43 med_int nnodes = 0;
44 med_int *triaconnectivity = NULL;
45 med_int ntria3 = 0;
46 med_int *quadconnectivity = NULL;
47 med_int nquad4 = 0;
48 med_bool coordinatechangement;
49 med_bool geotransformation;
50 int i;
51 med_int nfamily, ngroup;
52 med_int familynumber;
53 char *groupname=NULL;
54 char familyname[MED_NAME_SIZE+1]="";
55 med_int *familynumbers = NULL;
56 med_int nfamilynumber = 0;
57 int ret=-1;
58
59 /* open MED file with READ ONLY access mode */
60 fid = MEDfileOpen("UsesCase_MEDmesh_10.med",MED_ACC_RDONLY);
61 if (fid < 0) {
62 MESSAGE("ERROR : open file in READ ONLY ACCESS mode ...");
63 goto ERROR;
64 }
65
66 /*
67 * ... we know that the MED file has only one mesh,
68 * a real code would check ...
69 */
70
71 /* read mesh informations : mesh dimension, space dimension ... */
72 if (MEDmeshInfoByName(fid, meshname, &spacedim, &meshdim, &meshtype, meshdescription,
73 dtunit, &sortingtype, &nstep, &axistype, axisname, unitname) < 0) {
74 MESSAGE("ERROR : mesh info ...");
75 goto ERROR;
76 }
77
78 /* read how many nodes in the mesh */
79 if ((nnodes = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT, MED_NODE, MED_NO_GEOTYPE,
80 MED_COORDINATE, MED_NO_CMODE,&coordinatechangement,
81 &geotransformation)) < 0) {
82 MESSAGE("ERROR : number of nodes ...");
83 goto ERROR;
84 }
85
86 /*
87 * ... we know that we only have MED_TRIA3 and MED_QUAD4 in the mesh,
88 * a real code would check all MED geometry cell types ...
89 */
90
91 /* read how many triangular cells in the mesh */
92 if ((ntria3 = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,MED_TRIA3,
93 MED_CONNECTIVITY, MED_NODAL,&coordinatechangement,
94 &geotransformation)) < 0) {
95 MESSAGE("ERROR : number of MED_TRIA3 ...");
96 goto ERROR;
97 }
98
99 /* read how many quadrangular cells in the mesh */
100 if ((nquad4 = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,MED_QUAD4,
101 MED_CONNECTIVITY, MED_NODAL, &coordinatechangement,
102 &geotransformation)) < 0) {
103 MESSAGE("ERROR : number of MED_QUAD4 ...");
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 free(coordinates);
121
122 /* read cells connectivity in the mesh */
123 if ((triaconnectivity = (med_int *) malloc(sizeof(med_int)*ntria3*3)) == NULL) {
124 MESSAGE("ERROR : memory allocation ...");
125 goto ERROR;
126 }
127 if (MEDmeshElementConnectivityRd(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,
128 MED_TRIA3, MED_NODAL, MED_FULL_INTERLACE, triaconnectivity) < 0) {
129 MESSAGE("ERROR : MED_TRIA3 connectivity ...");
130 free(triaconnectivity);
131 goto ERROR;
132 }
133 free(triaconnectivity);
134
135 if ((quadconnectivity = (med_int *) malloc(sizeof(med_int)*nquad4*4)) == NULL) {
136 MESSAGE("ERROR : memory allocation ...");
137 goto ERROR;
138 }
139 if (MEDmeshElementConnectivityRd(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,
140 MED_QUAD4, MED_NODAL, MED_FULL_INTERLACE, quadconnectivity) < 0) {
141 MESSAGE("ERROR : MED_QUAD4 connectivity ...");
142 free(quadconnectivity);
143 goto ERROR;
144 }
145 free(quadconnectivity);
146
147 /*
148 * read families of entities...
149 */
150 if ((nfamily = MEDnFamily(fid,meshname)) < 0) {
151 MESSAGE("ERROR : read number of family ...");
152 goto ERROR;
153 }
154
155 for (i=0; i<nfamily ; i++) {
156
157 if ((ngroup = MEDnFamilyGroup(fid, meshname, i+1)) < 0) {
158 MESSAGE("ERROR : read number of group in a family ...");
159 goto ERROR;
160 }
161
162 if (ngroup > 0) {
163 if ((groupname = (char*) malloc(sizeof(char)*MED_LNAME_SIZE*ngroup+1)) == NULL) {
164 MESSAGE("ERROR : memory allocation ...");
165 goto ERROR;
166 }
167
168 if (MEDfamilyInfo(fid, meshname, i+1, familyname, &familynumber, groupname) < 0) {
169 MESSAGE("ERROR : family info ...");
170 free(groupname);
171 goto ERROR;
172 }
173 free(groupname);
174 }
175
176 }
177
178 /* check for family numbers */
179 /* By convention, if there is no numbers in the file, it means that 0 is the family
180 number of all nodes */
181 if ((nfamilynumber = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT,
182 MED_NODE, MED_NONE, MED_FAMILY_NUMBER, MED_NO_CMODE,
183 &coordinatechangement, &geotransformation)) < 0) {
184 MESSAGE("ERROR : check family numbers nodes ...");
185 goto ERROR;
186 }
187
188 if ((familynumbers = (med_int *) malloc(sizeof(med_int)*nnodes)) == NULL) {
189 MESSAGE("ERROR : memory allocation ...");
190 goto ERROR;
191 }
192
193 if (nfamilynumber > 0) {
194 /* read family numbers for nodes */
195 if (MEDmeshEntityFamilyNumberRd(fid, meshname, MED_NO_DT, MED_NO_IT,
196 MED_NODE, MED_NONE, familynumbers) < 0) {
197 MESSAGE("ERROR : read family numbers nodes ...");
198 goto ERROR;
199 }
200 } else
201 for (i=0; i<nnodes; i++) *(familynumbers+i) = 0;
202
203 for (i=0; i<nnodes; i++) {
204 printf(IFORMAT, *(familynumbers+i));
205 if (i+1 != nnodes)
206 printf(" - ");
207 else
208 printf("\n");
209 }
210
211 if (familynumbers)
212 free(familynumbers);
213
214 /* read family numbers for cells */
215
216 if ((nfamilynumber = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT,
217 MED_CELL, MED_TRIA3, MED_FAMILY_NUMBER, MED_NODAL,
218 &coordinatechangement, &geotransformation)) < 0) {
219 MESSAGE("ERROR : check family number tria3 ...")
220 goto ERROR;
221 }
222
223 if ((familynumbers = (med_int *) malloc(sizeof(med_int)*ntria3)) == NULL) {
224 MESSAGE("ERROR : memory allocation ...");
225 goto ERROR;
226 }
227
228 if (nfamilynumber > 0) {
229 if (MEDmeshEntityFamilyNumberRd(fid, meshname, MED_NO_DT, MED_NO_IT,
230 MED_CELL, MED_TRIA3, familynumbers) < 0) {
231 MESSAGE("ERROR : read family numbers tria3 ...");
232 }
233 } else
234 for (i=0; i<ntria3; i++) *(familynumbers+i) = 0;
235
236 free (familynumbers);
237
238 if ((nfamilynumber = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT,
239 MED_CELL, MED_QUAD4, MED_FAMILY_NUMBER, MED_NODAL,
240 &coordinatechangement, &geotransformation)) < 0) {
241 MESSAGE("ERROR : check family number quad4 ...");
242 goto ERROR;
243 }
244
245 if ((familynumbers = (med_int *) malloc(sizeof(med_int)*nquad4)) == NULL) {
246 MESSAGE("ERROR : memory allocation ...");
247 goto ERROR;
248 }
249
250 if (nfamilynumber > 0) {
251 if (MEDmeshEntityFamilyNumberRd(fid, meshname, MED_NO_DT, MED_NO_IT,
252 MED_CELL, MED_QUAD4, familynumbers) < 0) {
253 MESSAGE("ERROR : read family numbers quad4 ...");
254 goto ERROR;
255 }
256 } else
257 for (i=0; i<nquad4; i++) *(familynumbers+i) = 0;
258
259 free (familynumbers);
260
261 ret=0;
262 ERROR:
263
264 /* close MED file */
265 if (MEDfileClose(fid) < 0) {
266 MESSAGE("ERROR : close file");
267 ret= -1;
268 }
269
270 return ret;
271 }
MED_TRIA3
#define MED_TRIA3
Definition: med.h:203
MED_FULL_INTERLACE
Definition: med.h:96
MED_COMMENT_SIZE
#define MED_COMMENT_SIZE
Definition: med.h:79
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
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_NO_GEOTYPE
#define MED_NO_GEOTYPE
Definition: med.h:232
med_idt
hid_t med_idt
Definition: med.h:331
MED_ACC_RDONLY
Definition: med.h:120
med_sorting_type
med_sorting_type
Definition: med.h:309
MED_NO_CMODE
Definition: med.h:255
MED_CELL
Definition: med.h:143
MESSAGE
#define MESSAGE(chaine)
Definition: med_utils.h:324
med_int
int med_int
Definition: med.h:342
med.h
med_bool
med_bool
Definition: med.h:260
MED_FAMILY_NUMBER
Definition: med.h:149
med_float
double med_float
Definition: med.h:336
MEDnFamilyGroup
MEDC_EXPORT med_int MEDnFamilyGroup(const med_idt fid, const char *const meshname, const int famit)
Cette routine permet de lire le nombre de groupe dans une famille.
Definition: MEDnFamilyGroup.c:36
IFORMAT
#define IFORMAT
Definition: med_utils.h:145
MED_NO_DT
#define MED_NO_DT
Definition: med.h:320
MED_NONE
#define MED_NONE
Definition: med.h:231
MED_CONNECTIVITY
Definition: med.h:149
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
MED_NODE
Definition: med.h:143
med_mesh_type
med_mesh_type
Definition: med.h:131
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_LNAME_SIZE
#define MED_LNAME_SIZE
Definition: med.h:83
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
MEDnFamily
MEDC_EXPORT med_int MEDnFamily(const med_idt fid, const char *const meshname)
Cette routine permet de lire le nombre de famille dans un maillage.
Definition: MEDnFamily.c:35
MEDmeshInfoByName
MEDC_EXPORT med_err MEDmeshInfoByName(const med_idt fid, const 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 en précisant son nom.
Definition: MEDmeshInfoByName.c:42
med_axis_type
med_axis_type
Definition: med.h:258
MEDfamilyInfo
MEDC_EXPORT med_err MEDfamilyInfo(const med_idt fid, const char *const meshname, const int famit, char *const familyname, med_int *const familynumber, char *const groupname)
Cette routine permet de lire les informations relatives à une famille d'un maillage.
Definition: MEDfamilyInfo.c:39
MED_NO_IT
#define MED_NO_IT
Definition: med.h:321
main
int main(int argc, char **argv)
Definition: UsesCase_MEDmesh_11.c:29
MED_COORDINATE
Definition: med.h:149
MEDmeshEntityFamilyNumberRd
MEDC_EXPORT med_err MEDmeshEntityFamilyNumberRd(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, med_int *const number)
Cette routine permet la lecture des numéros de famille d'un type d'entité d'un maillage.
Definition: MEDmeshEntityFamilyNumberRd.c:39
med_utils.h
MED_QUAD4
#define MED_QUAD4
Definition: med.h:204