MED fichier
UsesCase_MEDmesh_7.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  * Use case 7 : read a 2D unstructured mesh with nodes coordinates modifications
20  */
21 
22 #include <med.h>
23 #define MESGERR 1
24 #include <med_utils.h>
25 
26 #include <string.h>
27 
28 int main (int argc, char **argv) {
29  med_idt fid;
30  const char meshname[MED_NAME_SIZE+1] = "2D unstructured mesh";
31  char meshdescription[MED_COMMENT_SIZE+1]="";
32  med_int meshdim;
33  med_int spacedim;
34  med_sorting_type sortingtype;
35  med_int nstep;
36  med_mesh_type meshtype;
37  med_axis_type axistype;
38  char axisname[2*MED_SNAME_SIZE+1]="";
39  char unitname[2*MED_SNAME_SIZE+1]="";
40  char dtunit[MED_SNAME_SIZE+1]="";
41  med_float *coordinates = NULL;
42  med_int nnodes = 0;
43  med_int *triaconnectivity = NULL;
44  med_int ntria3 = 0;
45  med_int *quadconnectivity = NULL;
46  med_int nquad4 = 0;
47  med_bool coordinatechangement;
48  med_bool geotransformation;
49  int i, it;
50  med_int profilesize;
51  char profilename[MED_NAME_SIZE+1]="";
52  med_int numdt, numit;
53  med_float dt;
54  int ret=-1;
55 
56  /* open MED file with READ ONLY access mode */
57  fid = MEDfileOpen("UsesCase_MEDmesh_6.med",MED_ACC_RDONLY);
58  if (fid < 0) {
59  MESSAGE("ERROR : open file in READ ONLY ACCESS mode ...");
60  goto ERROR;
61  }
62 
63  /*
64  * ... we know that the MED file has only one mesh,
65  * a real code would check ...
66  */
67 
68  /* read mesh informations : mesh dimension, space dimension ... */
69  if (MEDmeshInfoByName(fid, meshname, &spacedim, &meshdim, &meshtype, meshdescription,
70  dtunit, &sortingtype, &nstep, &axistype, axisname, unitname) < 0) {
71  MESSAGE("ERROR : mesh info ...");
72  goto ERROR;
73  }
74 
75  /* read how many nodes in the mesh */
76  if ((nnodes = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT, MED_NODE, MED_NO_GEOTYPE,
77  MED_COORDINATE, MED_NO_CMODE,&coordinatechangement,
78  &geotransformation)) < 0) {
79  MESSAGE("ERROR : number of nodes ...");
80  goto ERROR;
81  }
82 
83  /*
84  * ... we know that we only have MED_TRIA3 and MED_QUAD4 in the mesh,
85  * a real code would check all MED geometry cell types ...
86  */
87 
88  /* read how many triangular cells in the mesh */
89  if ((ntria3 = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,MED_TRIA3,
90  MED_CONNECTIVITY, MED_NODAL,&coordinatechangement,
91  &geotransformation)) < 0) {
92  MESSAGE("ERROR : number of MED_TRIA3 ...");
93  goto ERROR;
94  }
95 
96  /* read how many quadrangular cells in the mesh */
97  if ((nquad4 = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,MED_QUAD4,
98  MED_CONNECTIVITY, MED_NODAL, &coordinatechangement,
99  &geotransformation)) < 0) {
100  MESSAGE("ERROR : number of MED_QUAD4 ...");
101  goto ERROR;
102  }
103 
104  /* read mesh nodes coordinates in the initial mesh */
105  if ((coordinates = (med_float*) malloc(sizeof(med_float)*nnodes*spacedim)) == NULL) {
106  MESSAGE("ERROR : memory allocation ...");
107  goto ERROR;
108  }
109 
111  coordinates) < 0) {
112  MESSAGE("ERROR : nodes coordinates ...");
113  free(coordinates);
114  goto ERROR;
115  }
116 
117  /* read cells connectivity in the initial mesh */
118  if ((triaconnectivity = (med_int *) malloc(sizeof(med_int)*ntria3*3)) == NULL) {
119  MESSAGE("ERROR : memory allocation ...");
120  goto ERROR;
121  }
123  MED_TRIA3, MED_NODAL, MED_FULL_INTERLACE, triaconnectivity) < 0) {
124  MESSAGE("ERROR : MED_TRIA3 connectivity ...");
125  free(triaconnectivity);
126  goto ERROR;
127  }
128  free(triaconnectivity);
129 
130  if ((quadconnectivity = (med_int *) malloc(sizeof(med_int)*nquad4*4)) == NULL) {
131  MESSAGE("ERROR : memory allocation ...");
132  goto ERROR;
133  }
135  MED_QUAD4, MED_NODAL, MED_FULL_INTERLACE, quadconnectivity) < 0) {
136  MESSAGE("ERROR : MED_QUAD4 connectivity ...");
137  free(quadconnectivity);
138  goto ERROR;
139  }
140  free(quadconnectivity);
141 
142  /*
143  * ... we know that the family number of nodes and elements is 0, a real code would check ...
144  */
145 
146  /* read nodes coordinates changements step by step */
147  for (it=1;it<nstep;it++) {
148 
149  if (MEDmeshComputationStepInfo(fid, meshname, it+1,
150  &numdt, &numit, &dt) < 0) {
151  MESSAGE("ERROR : Computing step info ...");
152  SSCRUTE(meshname);
153  goto ERROR;
154  }
155 
156  /* test changement : for nodes coordinates */
157  if ((nnodes = MEDmeshnEntityWithProfile(fid, meshname, numdt, numit,
160  MED_GLOBAL_STMODE, profilename, &profilesize,
161  &coordinatechangement, &geotransformation)) < 0) {
162  MESSAGE("ERROR : number of nodes ...");
163  goto ERROR;
164  }
165 
166  /* if coordinates have changed, then read the new coordinates */
167  if (coordinatechangement) {
168  if (MEDmeshNodeCoordinateWithProfileRd(fid, meshname, numdt, numit,
169  MED_GLOBAL_STMODE,profilename,
171  coordinates) < 0) {
172  MESSAGE("ERROR : nodes coordinates ...");
173  free(coordinates);
174  goto ERROR;
175  }
176  }
177 
178  }
179 
180  free(coordinates);
181 
182  ret=0;
183  ERROR:
184 
185  /* close MED file */
186  if (MEDfileClose(fid) < 0) {
187  MESSAGE("ERROR : close file");
188  ret=-1;
189  }
190 
191 
192  return ret;
193 }
194 
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
MEDmeshComputationStepInfo
MEDC_EXPORT med_err MEDmeshComputationStepInfo(const med_idt fid, const char *const meshname, const int csit, med_int *const numdt, med_int *const numit, med_float *const dt)
Cette routine permet de lire les informations relatives à une étape de calcul d'un maillage.
Definition: MEDmeshComputationStepInfo.c:38
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
main
int main(int argc, char **argv)
Definition: UsesCase_MEDmesh_7.c:28
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_float
double med_float
Definition: med.h:336
MED_NO_DT
#define MED_NO_DT
Definition: med.h:320
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
SSCRUTE
#define SSCRUTE(chaine)
Definition: med_utils.h:323
MED_GLOBAL_STMODE
Definition: med.h:109
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_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
MEDmeshnEntityWithProfile
MEDC_EXPORT med_int MEDmeshnEntityWithProfile(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, const med_storage_mode storagemode, char *const profilename, med_int *const profilesize, 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 et un prof...
Definition: MEDmeshnEntityWithProfile.c:47
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
MED_NO_IT
#define MED_NO_IT
Definition: med.h:321
MED_COORDINATE
Definition: med.h:149
MEDmeshNodeCoordinateWithProfileRd
MEDC_EXPORT med_err MEDmeshNodeCoordinateWithProfileRd(const med_idt fid, const char *const meshname, const med_int numdt, const med_int numit, const med_storage_mode storagemode, const char *const profilename, const med_switch_mode switchmode, const med_int dimselect, med_float *const coordinates)
Cette routine permet de lire dans un maillage le tableau des coordonnées des noeuds,...
Definition: MEDmeshNodeCoordinateWithProfileRd.c:40
med_utils.h
MED_QUAD4
#define MED_QUAD4
Definition: med.h:204