MED fichier: usecases/c/UsesCase_MEDstructElement_2.c

MED fichier

usecases/c/UsesCase_MEDstructElement_2.c
/* This file is part of MED.
*
* COPYRIGHT (C) 1999 - 2023 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/>.
*/
#include <med.h>
#define MESGERR 1
#include <med_utils.h>
#include <string.h>
/*
* StructElement use case 2 : read struct element models in a file
* Classical iteration approach
* STEP 1 : read suppport mesh
* STEP 2 : read struct element model
* STEP 3 : read in a computation mesh
* A access from the computation mesh is defined in StructElement use case 3.
*/
int main (int argc, char **argv) {
med_idt fid;
med_int nmodels, nsmesh;
int i,j,k;
char elementname [MED_NAME_SIZE+1]="";
char supportmeshname[MED_NAME_SIZE+1]="";
const char computmeshname [MED_NAME_SIZE+1]="COMPUT_MESH";
med_geometry_type *geotype;
med_geometry_type geocelltype;
med_entity_type entitype;
med_int elementdim,nnode,ncell;
med_bool anyprofile=0;
med_int nconstatt, *nvaratt;
char attname [MED_NAME_SIZE+1]="";
char profilename[MED_NAME_SIZE+1]="";
med_attribute_type atttype;
med_int nattcomp;
med_entity_type attentitype;
med_int profilesize;
unsigned char *value;
med_int size=0;
med_int meshdim, spacedim;
char description[MED_COMMENT_SIZE+1]="";
char axisname [3*MED_SNAME_SIZE+1]="";
char axisunit [3*MED_SNAME_SIZE+1]="";
med_axis_type axistype;
med_float *coordinates;
med_bool coordinatechangement, geotransformation;
med_int nseg2, *seg2connectivity;
med_int nentities=0;
med_sorting_type sortingtype;
med_mesh_type meshtype;
med_int nstep;
char dtunit [MED_SNAME_SIZE+1]="";
char unitname[2*MED_SNAME_SIZE+1]="";
char tmp [MED_NAME_SIZE+1]="";
int ret=-1;
/* open file */
fid = MEDfileOpen("UsesCase_MEDstructElement_1.med",MED_ACC_RDONLY);
if (fid < 0) {
MESSAGE("ERROR : file creation ...");
goto ERROR;
}
/* STEP 1 */
/* how many support mesh in the file ? */
if ((nsmesh = MEDnSupportMesh(fid)) < 0 ) {
MESSAGE("ERROR : read number of support mesh ...");
goto ERROR;
}
/* read each support mesh */
for (i=0; i<nsmesh; i++) {
if ( MEDsupportMeshInfo(fid, i+1, supportmeshname, &spacedim, &meshdim, description,
&axistype, axisname, axisunit) < 0 ) {
MESSAGE("ERROR : read information about mesh support ...");
goto ERROR;
}
/* read how many nodes in the mesh */
if ((nnode = MEDmeshnEntity(fid, supportmeshname, MED_NO_DT, MED_NO_IT, MED_NODE, MED_NONE,
MED_COORDINATE, MED_NO_CMODE, &coordinatechangement,
&geotransformation)) < 0) {
MESSAGE("ERROR : read number of nodes ...");
goto ERROR;
}
/* read mesh nodes coordinates */
coordinates = (med_float*) malloc(sizeof(med_float)*nnode*spacedim);
if (MEDmeshNodeCoordinateRd(fid, supportmeshname, MED_NO_DT, MED_NO_IT, MED_FULL_INTERLACE,
coordinates) < 0) {
MESSAGE("ERROR : read nodes coordinates ...");
free(coordinates);
goto ERROR;
}
/* free memory */
free(coordinates);
/* ... In this case, we suppose that we have only MED_SEG2
* as cell elements in our support meshes
* a real code would check ... */
if ((nseg2 = MEDmeshnEntity(fid, supportmeshname, MED_NO_DT, MED_NO_IT, MED_CELL, MED_SEG2,
MED_CONNECTIVITY, MED_NODAL, &coordinatechangement,
&geotransformation)) < 0) {
MESSAGE("ERROR : number of MED_SEG2 ...");
goto ERROR;
}
/* read MED_SEG2 connectivity if necessary */
if (nseg2 > 0) {
seg2connectivity = (med_int *) malloc(sizeof(med_int)*nseg2*2);
if (MEDmeshElementConnectivityRd(fid, supportmeshname, MED_NO_DT, MED_NO_IT, MED_CELL,
MED_SEG2, MED_NODAL, MED_FULL_INTERLACE, seg2connectivity) < 0) {
MESSAGE("ERROR : MED_SEG2 connectivity ...");
free(seg2connectivity);
goto ERROR;
}
free(seg2connectivity);
}
}
/* STEP 2 */
/* how many struct element models ? */
if ((nmodels = MEDnStructElement(fid)) < 0) {
MESSAGE("ERROR : read number of struct element models ...");
goto ERROR;
}
geotype = (med_geometry_type *) malloc(sizeof(med_geometry_type)*nmodels);
nvaratt = (med_int *) malloc(sizeof(med_int)*nmodels);
/* read each model */
for (i=0; i<nmodels; i++) {
if (MEDstructElementInfo(fid, i+1, elementname, geotype+i, &elementdim,
supportmeshname, &entitype, &nnode, &ncell,
&geocelltype, &nconstatt, &anyprofile, nvaratt+i) < 0) {
MESSAGE("ERROR : struct element models information ...");
goto ERROR;
}
/* read constant attribute(s) */
for (j=0; j<nconstatt; j++) {
if ( MEDstructElementConstAttInfo(fid, elementname, j+1,
attname, &atttype, &nattcomp, &attentitype,
profilename, &profilesize) < 0) {
MESSAGE("ERROR : const attribute information ...");
goto ERROR;
}
/* memory allocation */
if (profilesize != 0)
size = profilesize*nattcomp*MEDstructElementAttSizeof(atttype);
else
if (entitype == MED_NODE)
size = nnode*nattcomp*MEDstructElementAttSizeof(atttype);
else
size = ncell*nattcomp*MEDstructElementAttSizeof(atttype);
if ( atttype == MED_ATT_NAME) ++size;
value = (unsigned char *) malloc(size);
/* read attribute(s) value(s) */
if ( MEDstructElementConstAttRd(fid, elementname, attname, (unsigned char *)value ) < 0 ) {
MESSAGE("ERROR : const attribute value ...");
free(value);
goto ERROR;
}
free(value);
}
/* read variable attribute(s) */
/* values must be read in a computation mesh => see STEP 3 */
}
/* STEP 3 */
/*
* ... In this case, 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, computmeshname, &spacedim, &meshdim, &meshtype, description,
dtunit, &sortingtype, &nstep, &axistype, axisname, unitname) < 0) {
MESSAGE("ERROR : mesh info ...");
goto ERROR;
}
/* Get dynamically struct element name for each struct element model,
then for each type read the connectivity if a support mesh exist and
finaly the variable(s) attribute(s) */
for (i=0;i<nmodels;i++) {
/* read how many MED_STRUCT_ELEMENT of type *(geotype+i) there is in the mesh */
if ((nentities = MEDmeshnEntity(fid, computmeshname, MED_NO_DT, MED_NO_IT, MED_STRUCT_ELEMENT,*(geotype+i),
MED_CONNECTIVITY, MED_NODAL, &coordinatechangement,
&geotransformation)) < 0) {
MESSAGE("ERROR : number of MED_STRUCT_ELEMENT ...");
goto ERROR;
}
if (MEDstructElementName(fid,*(geotype+i),elementname) < 0) {
MESSAGE("ERROR : get element name ...");
goto ERROR;
}
for (j=0; j<*(nvaratt+i); j++) {
/* read informations about each attribute */
if ( MEDstructElementVarAttInfo(fid, elementname, j+1,
attname, &atttype, &nattcomp) < 0) {
MESSAGE("ERROR : var attribute information ...");
goto ERROR;
}
/* memory allocation */
if (entitype == MED_NODE)
size = nattcomp*nentities*MEDstructElementAttSizeof(atttype);
else
size = nattcomp*nentities*MEDstructElementAttSizeof(atttype);
if ( atttype == MED_ATT_NAME) ++size;
value = (unsigned char *) malloc(size);
/* read attribute values */
if (MEDmeshStructElementVarAttRd(fid, computmeshname, MED_NO_DT, MED_NO_IT,
*(geotype+i), attname, value ) < 0) {
MESSAGE("ERROR : read variable attributes values ...");
free(value);
goto ERROR;
}
/*TODO : Lire les connectivit�s des �l�ments de structures */
free(value);
}
}
ret=0;
ERROR:
free(geotype);
free(nvaratt);
/* close file */
if (MEDfileClose(fid) < 0) {
MESSAGE("ERROR : file closing ...");
ret=-1;
}
return ret;
}
MEDmeshStructElementVarAttRd
MEDC_EXPORT med_err MEDmeshStructElementVarAttRd(const med_idt fid, const char *const meshname, const med_int numdt, const med_int numit, const med_geometry_type mgeotype, const char *const varattname, void *const value)
Cette routine lit les valeurs d'un attribut caractéristique variable sur les éléments de structure d'...
Definition: MEDmeshStructElementVarAttRd.c:43
MEDstructElementName
MEDC_EXPORT med_err MEDstructElementName(const med_idt fid, const med_geometry_type mgeotype, char *const modelname)
Cette routine renvoie le nom du modèle d'éléments de structure associé au type mgeotype.
Definition: MEDstructElementName.c:37
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_ATT_NAME
Definition: med.h:177
MED_SNAME_SIZE
#define MED_SNAME_SIZE
Definition: med.h:84
MEDstructElementVarAttInfo
MEDC_EXPORT med_err MEDstructElementVarAttInfo(const med_idt fid, const char *const modelname, const int attit, char *const varattname, med_attribute_type *const varatttype, med_int *const ncomponent)
Cette routine décrit les caractéristiques d'un attribut variable de modèle d'élément de structure par...
Definition: MEDstructElementVarAttInfo.c:41
med_idt
hid_t med_idt
Definition: med.h:333
MEDstructElementInfo
MEDC_EXPORT med_err MEDstructElementInfo(const med_idt fid, const int mit, char *const modelname, med_geometry_type *const mgeotype, med_int *const modeldim, char *const supportmeshname, med_entity_type *const sentitytype, med_int *const snnode, med_int *const sncell, med_geometry_type *const sgeotype, med_int *const nconstantattribute, med_bool *const anyprofile, med_int *const nvariableattribute)
Cette routine décrit les caractéristiques d'un modèle d'élément de structure par itération.
Definition: MEDstructElementInfo.c:50
MED_SEG2
#define MED_SEG2
Definition: med.h:202
MEDsupportMeshInfo
MEDC_EXPORT med_err MEDsupportMeshInfo(const med_idt fid, const int meshit, char *const supportmeshname, med_int *const spacedim, med_int *const meshdim, char *const description, med_axis_type *const axistype, char *const axisname, char *const axisunit)
Cette routine permet de lire les informations relatives à un maillage support dans un fichier.
Definition: MEDsupportMeshInfo.c:39
med_sorting_type
med_sorting_type
Definition: med.h:311
med_entity_type
med_entity_type
Definition: med.h:145
MESSAGE
#define MESSAGE(chaine)
Definition: med_utils.h:324
MED_FULL_INTERLACE
Definition: med.h:98
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_int
int med_int
Definition: med.h:344
MED_STRUCT_ELEMENT
Definition: med.h:146
MEDstructElementConstAttRd
MEDC_EXPORT med_err MEDstructElementConstAttRd(const med_idt fid, const char *const modelname, const char *const constattname, void *const value)
Cette routine lit la valeur d'un attribut caractéristique constant d'un modèle d'éléments de structur...
Definition: MEDstructElementConstAttRd.c:42
MEDnStructElement
MEDC_EXPORT med_int MEDnStructElement(const med_idt fid)
Cette routine renvoie le nombre de modèles d'éléments de structure.
Definition: MEDnStructElement.c:35
med_attribute_type
med_attribute_type
Definition: med.h:175
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_NO_DT
#define MED_NO_DT
Definition: med.h:322
MED_NONE
#define MED_NONE
Definition: med.h:233
MEDstructElementAttSizeof
MEDC_EXPORT int MEDstructElementAttSizeof(const med_attribute_type atttype)
Cette routine renvoie la taille en octets du type élémentaire atttype.
Definition: MEDstructElementAttsizeof.c:27
MEDfileClose
MEDC_EXPORT med_err MEDfileClose(med_idt fid)
Fermeture d'un fichier MED.
Definition: MEDfileClose.c:30
MEDstructElementConstAttInfo
MEDC_EXPORT med_err MEDstructElementConstAttInfo(const med_idt fid, const char *const modelname, const int attit, char *const constattname, med_attribute_type *const constatttype, med_int *const ncomponent, med_entity_type *const sentitytype, char *const profilename, med_int *const profilesize)
Cette routine décrit les caractéristiques d'un attribut constant de modèle d'élément de structure par...
Definition: MEDstructElementConstAttInfo.c:45
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
MED_CONNECTIVITY
Definition: med.h:151
MED_NO_IT
#define MED_NO_IT
Definition: med.h:323
MEDfileOpen
MEDC_EXPORT med_idt MEDfileOpen(const char *const filename, const med_access_mode accessmode)
Ouverture d'un fichier MED.
Definition: MEDfileOpen.c:42
MEDnSupportMesh
MEDC_EXPORT med_int MEDnSupportMesh(const med_idt fid)
Cette routine permet de lire le nombre de maillages support dans un fichier.
Definition: MEDnSupportMesh.c:34
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
main
int main(int argc, char **argv)
Definition: 3.0.8/test10.c:50
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