# UsesCase_MEDmesh_8.c

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    00001 /*  This file is part of MED.
    00002  *
    00003  *  COPYRIGHT (C) 1999 - 2011  EDF R&D, CEA/DEN
    00004  *  MED is free software: you can redistribute it and/or modify
    00005  *  it under the terms of the GNU Lesser General Public License as published by
    00006  *  the Free Software Foundation, either version 3 of the License, or
    00007  *  (at your option) any later version.
    00008  *
    00009  *  MED is distributed in the hope that it will be useful,
    00010  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
    00011  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00012  *  GNU Lesser General Public License for more details.
    00013  *
    00014  *  You should have received a copy of the GNU Lesser General Public License
    00015  *  along with MED.  If not, see <http://www.gnu.org/licenses/>.
    00016  */
    00017
    00018 /*
    00019  *  Use case 8 : read a 2D unstructured mesh with coordinates nodes
    00020  *  modifications (generic approach)
    00021  */
    00022
    00023 #include <med.h>
    00024 #define MESGERR 1
    00025 #include <med_utils.h>
    00026
    00027 #include <string.h>
    00028
    00029 int main (int argc, char **argv) {
    00030   med_idt fid;
    00031   med_int nmesh;
    00032   char meshname[MED_NAME_SIZE+1]="";
    00033   char meshdescription[MED_COMMENT_SIZE+1]="";
    00034   med_int meshdim;
    00035   med_int spacedim;
    00036   med_sorting_type sortingtype;
    00037   med_int nstep;
    00038   med_mesh_type meshtype;
    00039   med_axis_type axistype;
    00040   char *axisname;
    00041   char *unitname;
    00042   char dtunit[MED_SNAME_SIZE+1]="";
    00043   med_float *coordinates = NULL;
    00044   med_int ngeo = 0;
    00045   med_int nnodes = 0;
    00046   med_int *connectivity = NULL;
    00047   med_bool coordinatechangement;
    00048   med_bool geotransformation;
    00049   int i, it, j;
    00050   med_int profilesize;
    00051   char profilename[MED_NAME_SIZE+1]="";
    00052   med_int numdt, numit;
    00053   med_float dt;
    00054   med_geometry_type geotype;
    00055   med_geometry_type *geotypes = MED_GET_CELL_GEOMETRY_TYPE;
    00056   int ret=-1;
    00057
    00058   /* open MED file with READ ONLY access mode */
    00059   fid = MEDfileOpen("UsesCase_MEDmesh_6.med",MED_ACC_RDONLY);
    00060   if (fid < 0) {
    00061     MESSAGE("ERROR : open file in READ ONLY ACCESS mode ...");
    00062     goto ERROR;
    00063   }
    00064
    00065
    00066   /* read how many mesh in the file */
    00067   if ((nmesh = MEDnMesh(fid)) < 0) {
    00068     MESSAGE("ERROR : read how many mesh ...");
    00069     goto ERROR;
    00070   }
    00071
    00072   for (i=0;i<nmesh;i++) {
    00073
    00074     /* read computation space dimension */
    00075     if ((spacedim = MEDmeshnAxis(fid, i+1)) < 0) {
    00076       MESSAGE("ERROR : read computation space dimension ...");
    00077       goto ERROR;
    00078     }
    00079
    00080     /* memory allocation */
    00081     if ((axisname  = (char*) malloc(MED_SNAME_SIZE*spacedim+1)) == NULL) {
    00082       MESSAGE("ERROR : memory allocation ...");
    00083       goto ERROR;
    00084     }
    00085     if ((unitname  = (char*) malloc(MED_SNAME_SIZE*spacedim+1)) == NULL) {
    00086       MESSAGE("ERROR : memory allocation ...");
    00087       goto ERROR;
    00088     }
    00089
    00090     /* read mesh informations : meshname, mesh dimension, mesh type ... */
    00091     if (MEDmeshInfo(fid, i+1, meshname, &spacedim, &meshdim, &meshtype, meshdescription,
    00092                     dtunit, &sortingtype, &nstep,
    00093                     &axistype, axisname, unitname) < 0) {
    00094       MESSAGE("ERROR : mesh info ...")
    00095         free(axisname);
    00096       free(unitname);
    00097       goto ERROR;
    00098     }
    00099     free(axisname);
    00100     free(unitname);
    00101
    00102
    00103     /* read how many nodes in the mesh */
    00104     if ((nnodes = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT, MED_NODE, MED_NONE,
    00105                                  MED_COORDINATE, MED_NO_CMODE,&coordinatechangement,
    00106                                  &geotransformation)) < 0) {
    00107       MESSAGE("ERROR : number of nodes ...");
    00108       goto ERROR;
    00109     }
    00110
    00111     /* read mesh nodes coordinates */
    00112     if ((coordinates = (med_float*) malloc(sizeof(med_float)*nnodes*spacedim)) == NULL) {
    00113       MESSAGE("ERROR : memory allocation ...");
    00114       goto ERROR;
    00115     }
    00116
    00117     if (MEDmeshNodeCoordinateRd(fid, meshname, MED_NO_DT, MED_NO_IT, MED_FULL_INTERLACE,
    00118                                 coordinates) < 0) {
    00119       MESSAGE("ERROR : nodes coordinates ...");
    00120       free(coordinates);
    00121       goto ERROR;
    00122     }
    00123
    00124
    00125     /* read all MED geometry cell types */
    00126     for (it=1; it<=MED_N_CELL_FIXED_GEO; it++) {
    00127
    00128       geotype = geotypes[it];
    00129
    00130       if ((ngeo = MEDmeshnEntity(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,geotype,
    00131                                  MED_CONNECTIVITY, MED_NODAL, &coordinatechangement,
    00132                                  &geotransformation)) < 0) {
    00133         MESSAGE("ERROR : number of cell ...");
    00134         ISCRUTE(geotype);
    00135         goto ERROR;
    00136       }
    00137
    00138       if (ngeo) {
    00139         /* read cells connectivity in the mesh */
    00140         if ((connectivity = (med_int *) malloc(sizeof(med_int)*ngeo*(geotype%100))) == NULL) {
    00141           MESSAGE("ERROR : memory allocation ...");
    00142           goto ERROR;
    00143         }
    00144
    00145         if (MEDmeshElementConnectivityRd(fid, meshname, MED_NO_DT, MED_NO_IT, MED_CELL,
    00146                                          geotype, MED_NODAL, MED_FULL_INTERLACE, connectivity) < 0) {
    00147           MESSAGE("ERROR : cellconnectivity ...");
    00148           ISCRUTE(geotype);
    00149           free(connectivity);
    00150           goto ERROR;
    00151         }
    00152
    00153         /* memory deallocation */
    00154         free(connectivity);
    00155         connectivity = NULL;
    00156       }
    00157     }
    00158
    00159
    00160     /* read nodes coordinates changements step by step */
    00161     for (it=1;it<nstep;it++) {
    00162
    00163       if (MEDmeshComputationStepInfo(fid, meshname, it+1,
    00164                                      &numdt, &numit, &dt) < 0) {
    00165         MESSAGE("ERROR : Computing step info ...");
    00166         SSCRUTE(meshname);
    00167         goto ERROR;
    00168       }
    00169
    00170       /* test changement : for nodes coordinates */
    00171       if ((nnodes = MEDmeshnEntityWithProfile(fid, meshname, numdt, numit,
    00172                                               MED_NODE, MED_NONE,
    00173                                               MED_COORDINATE, MED_NO_CMODE,
    00174                                               MED_GLOBAL_PFLMODE, profilename, &profilesize,
    00175                                               &coordinatechangement, &geotransformation)) < 0) {
    00176         MESSAGE("ERROR : number of nodes ...");
    00177         goto ERROR;
    00178       }
    00179
    00180       /* if only coordinates have changed, then read the new coordinates */
    00181       /* to verify if there is a matrix transformation => UsesCase_MEDmesh12. */
    00182       if (coordinatechangement && geotransformation) {
    00183         if (MEDmeshNodeCoordinateWithProfileRd(fid, meshname, numdt, numit,
    00184                                                MED_GLOBAL_PFLMODE,profilename,
    00185                                                MED_FULL_INTERLACE,MED_ALL_CONSTITUENT,
    00186                                                coordinates) < 0) {
    00187           MESSAGE("ERROR : nodes coordinates ...");
    00188           free(coordinates);
    00189           goto ERROR;
    00190         }
    00191       }
    00192
    00193     }
    00194   }
    00195
    00196   free(coordinates);
    00197
    00198   ret=0;
    00199  ERROR:
    00200
    00201   /* close MED file */
    00202   if (MEDfileClose(fid) < 0) {
    00203     MESSAGE("ERROR : close file");
    00204     ret=-1;
    00205   }
    00206
    00207
    00208   return ret;
    00209 }
    00210