usecases/c/UsesCase_MEDmesh_7.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 7 : read a 2D unstructured mesh with nodes coordinates modifications
*/
#include <med.h>
#define MESGERR 1
#include <med_utils.h>
#include <string.h>
int main (int argc, char **argv) {
med_idt fid;
const char meshname[MED_NAME_SIZE+1] = "2D unstructured mesh";
char meshdescription[MED_COMMENT_SIZE+1]="";
med_int meshdim;
med_int spacedim;
med_sorting_type sortingtype;
med_int nstep;
med_mesh_type meshtype;
med_axis_type axistype;
char axisname[2*MED_SNAME_SIZE+1]="";
char unitname[2*MED_SNAME_SIZE+1]="";
char dtunit[MED_SNAME_SIZE+1]="";
med_float *coordinates = NULL;
med_int nnodes = 0;
med_int *triaconnectivity = NULL;
med_int ntria3 = 0;
med_int *quadconnectivity = NULL;
med_int nquad4 = 0;
med_bool coordinatechangement;
med_bool geotransformation;
int i, it;
med_int profilesize;
char profilename[MED_NAME_SIZE+1]="";
med_int numdt, numit;
med_float dt;
int ret=-1;
/* open MED file with READ ONLY access mode */
fid = MEDfileOpen("UsesCase_MEDmesh_6.med",MED_ACC_RDONLY);
if (fid < 0) {
MESSAGE("ERROR : open file in READ ONLY ACCESS mode ...");
goto ERROR;
}
/*
* ... we know that the MED file has only one mesh,
* a real code would check ...
*/
/* read mesh informations : mesh dimension, space dimension ... */
if (MEDmeshInfoByName(fid, meshname, &spacedim, &meshdim, &meshtype, meshdescription,
dtunit, &sortingtype, &nstep, &axistype, axisname, unitname) < 0) {
MESSAGE("ERROR : mesh info ...");
goto ERROR;
}
/* 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;
}
/*
* ... we know that we only have MED_TRIA3 and MED_QUAD4 in the mesh,
* a real code would check all MED geometry cell types ...
*/
/* read how many triangular cells in the mesh */
if ((ntria3 = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,MED_TRIA3,
MED_CONNECTIVITY, MED_NODAL,&coordinatechangement,
&geotransformation)) < 0) {
MESSAGE("ERROR : number of MED_TRIA3 ...");
goto ERROR;
}
/* read how many quadrangular cells in the mesh */
if ((nquad4 = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,MED_QUAD4,
MED_CONNECTIVITY, MED_NODAL, &coordinatechangement,
&geotransformation)) < 0) {
MESSAGE("ERROR : number of MED_QUAD4 ...");
goto ERROR;
}
/* read mesh nodes coordinates in the initial mesh */
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;
}
/* read cells connectivity in the initial mesh */
if ((triaconnectivity = (med_int *) malloc(sizeof(med_int)*ntria3*3)) == NULL) {
MESSAGE("ERROR : memory allocation ...");
goto ERROR;
}
if (MEDmeshElementConnectivityRd(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,
MED_TRIA3, MED_NODAL, MED_FULL_INTERLACE, triaconnectivity) < 0) {
MESSAGE("ERROR : MED_TRIA3 connectivity ...");
free(triaconnectivity);
goto ERROR;
}
free(triaconnectivity);
if ((quadconnectivity = (med_int *) malloc(sizeof(med_int)*nquad4*4)) == NULL) {
MESSAGE("ERROR : memory allocation ...");
goto ERROR;
}
if (MEDmeshElementConnectivityRd(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,
MED_QUAD4, MED_NODAL, MED_FULL_INTERLACE, quadconnectivity) < 0) {
MESSAGE("ERROR : MED_QUAD4 connectivity ...");
free(quadconnectivity);
goto ERROR;
}
free(quadconnectivity);
/*
* ... we know that the family number of nodes and elements is 0, a real code would check ...
*/
/* read nodes coordinates changements step by step */
for (it=1;it<nstep;it++) {
if (MEDmeshComputationStepInfo(fid, meshname, it+1,
&numdt, &numit, &dt) < 0) {
MESSAGE("ERROR : Computing step info ...");
SSCRUTE(meshname);
goto ERROR;
}
/* test changement : for nodes coordinates */
if ((nnodes = MEDmeshnEntityWithProfile(fid, meshname, numdt, numit,
MED_NODE, MED_NO_GEOTYPE,
MED_COORDINATE, MED_NO_CMODE,
MED_GLOBAL_STMODE, profilename, &profilesize,
&coordinatechangement, &geotransformation)) < 0) {
MESSAGE("ERROR : number of nodes ...");
goto ERROR;
}
/* if coordinates have changed, then read the new coordinates */
if (coordinatechangement) {
if (MEDmeshNodeCoordinateWithProfileRd(fid, meshname, numdt, numit,
MED_GLOBAL_STMODE,profilename,
MED_FULL_INTERLACE,MED_ALL_CONSTITUENT,
coordinates) < 0) {
MESSAGE("ERROR : nodes coordinates ...");
free(coordinates);
goto ERROR;
}
}
}
free(coordinates);
ret=0;
ERROR:
/* close MED file */
if (MEDfileClose(fid) < 0) {
MESSAGE("ERROR : close file");
ret=-1;
}
return ret;
}
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
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
main
int main(int argc, char **argv)
Definition: 3.0.8/test10.c:50
med_utils.h
MED_QUAD4
#define MED_QUAD4
Definition: med.h:204