usecases/c/UsesCase_MEDmesh_3.c
/* This file is part of MED.
*
* COPYRIGHT (C) 1999 - 2021 EDF R&D, CEA/DEN
* MED is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* MED is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with MED. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Use case 3 : read an unstructured mesh : generic approach
*/
#include <med.h>
#define MESGERR 1
#include <med_utils.h>
#include <string.h>
int main (int argc, char **argv) {
med_idt fid;
char meshname[MED_NAME_SIZE+1]="";
char meshdescription[MED_COMMENT_SIZE+1]="";
med_int meshdim=0;
med_int spacedim=0;
med_sorting_type sortingtype;
med_int nstep;
med_mesh_type meshtype;
med_axis_type axistype;
char *axisname="";
char *unitname="";
char dtunit[MED_SNAME_SIZE+1]="";
med_float *coordinates = NULL;
med_int nnodes = 0;
med_int ngeo = 0;
med_int nelt=0;
med_int *connectivity = NULL;
med_bool coordinatechangement;
med_bool geotransformation;
med_int i, j, it, nmesh;
med_geometry_type geotype;
med_geometry_type *geotypes = MED_GET_CELL_GEOMETRY_TYPE;
char geotypename[MED_NAME_SIZE+1];
int ret=-1;
/* open MED file with READ ONLY access mode */
fid = MEDfileOpen("UsesCase_MEDmesh_1.med",MED_ACC_RDONLY);
if (fid < 0) {
MESSAGE("ERROR : open file in READ ONLY ACCESS mode ...");
goto ERROR;
}
/* read how many mesh in the file */
if ((nmesh = MEDnMesh(fid)) < 0) {
MESSAGE("ERROR : read how many mesh ...");
goto ERROR;
}
for (i=0;i<nmesh;i++) {
/* read computation space dimension */
if ((spacedim = MEDmeshnAxis(fid, i+1)) < 0) {
MESSAGE("ERROR : read computation space dimension ...");
goto ERROR;
}
/* memory allocation */
if ((axisname = (char*) malloc(MED_SNAME_SIZE*spacedim+1)) == NULL) {
MESSAGE("ERROR : memory allocation ...");
goto ERROR;
}
if ((unitname = (char*) malloc(MED_SNAME_SIZE*spacedim+1)) == NULL) {
MESSAGE("ERROR : memory allocation ...");
goto ERROR;
}
/* read mesh informations : meshname, mesh dimension, mesh type ... */
if (MEDmeshInfo(fid, i+1, meshname, &spacedim, &meshdim, &meshtype, meshdescription,
dtunit, &sortingtype, &nstep, &axistype, axisname, unitname) < 0) {
MESSAGE("ERROR : mesh info ...");
free(axisname); free(unitname);
goto ERROR;
}
free(axisname);
free(unitname);
/* read how many nodes in the mesh */
if ((nnodes = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT, MED_NODE, MED_NO_GEOTYPE,
MED_COORDINATE, MED_NO_CMODE,&coordinatechangement,
&geotransformation)) < 0) {
MESSAGE("ERROR : number of nodes ...");
goto ERROR;
}
/* read mesh nodes coordinates */
if ((coordinates = (med_float*) malloc(sizeof(med_float)*nnodes*spacedim)) == NULL) {
MESSAGE("ERROR : memory allocation ...");
goto ERROR;
}
if (MEDmeshNodeCoordinateRd(fid, meshname, MED_NO_DT, MED_NO_IT, MED_FULL_INTERLACE,
coordinates) < 0) {
MESSAGE("ERROR : nodes coordinates ...");
free(coordinates);
goto ERROR;
}
if (coordinates)
free(coordinates);
/* read number of geometrical types for cells */
if ((ngeo = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,MED_GEO_ALL,
MED_CONNECTIVITY, MED_NODAL,&coordinatechangement,
&geotransformation)) < 0) {
MESSAGE("ERROR : number of geo type ...");
ISCRUTE_int(geotype);
goto ERROR;
}
for (it=1; it<=ngeo; it++) {
/* get geometry type */
if (MEDmeshEntityInfo(fid, meshname, MED_NO_DT, MED_NO_IT,MED_CELL,it,
geotypename,&geotype) < 0) {
MESSAGE("ERROR : get geo type ...");
ISCRUTE(it);
goto ERROR;
}
/* how many cells of type geotype ? */
if ((nelt = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,geotype,
MED_CONNECTIVITY, MED_NODAL,&coordinatechangement,
&geotransformation)) < 0) {
MESSAGE("ERROR : number of cell ...");
goto ERROR;
}
/* read cells connectivity in the mesh */
if ((connectivity = (med_int *) malloc(sizeof(med_int)*nelt*(geotype%100))) == NULL) {
MESSAGE("ERROR : memory allocation ...");
goto ERROR;
}
if (MEDmeshElementConnectivityRd(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,
geotype, MED_NODAL, MED_FULL_INTERLACE, connectivity) < 0) {
MESSAGE("ERROR : cell connectivity ...");
ISCRUTE_int(geotype);
free(connectivity);
goto ERROR;
}
/* memory deallocation */
if (connectivity) {
free(connectivity);
connectivity = NULL;
}
}
}
/*
* ... we know that the family number of nodes and elements is 0, a real code would check ...
*/
ret=0;
ERROR:
/* close MED file */
if (MEDfileClose(fid) < 0) {
MESSAGE("ERROR : close file");
ret=-1;
}
return ret;
}
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_geometry_type
int med_geometry_type
Definition: med.h:194
MED_SNAME_SIZE
#define MED_SNAME_SIZE
Definition: med.h:82
MED_NODAL
Definition: med.h:255
ISCRUTE_int
#define ISCRUTE_int(entier)
Definition: med_utils.h:314
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
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_int
int med_int
Definition: med.h:342
MED_GET_CELL_GEOMETRY_TYPE
med_geometry_type MED_GET_CELL_GEOMETRY_TYPE[MED_N_CELL_FIXED_GEO+2]
Definition: MEDiterators.c:55
med.h
ISCRUTE
#define ISCRUTE(entier)
Definition: med_utils.h:313
med_bool
med_bool
Definition: med.h:260
med_float
double med_float
Definition: med.h:336
MED_GEO_ALL
#define MED_GEO_ALL
Definition: med.h:236
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
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
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_NAME_SIZE
#define MED_NAME_SIZE
Definition: med.h:81
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
MEDfileClose
MEDC_EXPORT med_err MEDfileClose(med_idt fid)
Fermeture d'un fichier MED.
Definition: MEDfileClose.c:30
med_axis_type
med_axis_type
Definition: med.h:258
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
MED_NO_IT
#define MED_NO_IT
Definition: med.h:321
MED_COORDINATE
Definition: med.h:149
main
int main(int argc, char **argv)
Definition: 3.0.8/test10.c:50
med_utils.h