UsesCase_MEDfield_11.c

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00001 /*  This file is part of MED.
00002  *
00003  *  COPYRIGHT (C) 1999 - 2015  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  * Field use case 11 : read a field in a MED file with computing steps,
00020  *                     profiles, integration points, interpolation families
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   char meshname[MED_NAME_SIZE+1]="";
00032   med_bool localmesh;
00033   const char fieldname[MED_NAME_SIZE+1] = "TEMPERATURE_FIELD";
00034   med_field_type fieldtype;
00035   char componentname[MED_SNAME_SIZE+1]="";
00036   char componentunit[MED_SNAME_SIZE+1]="";
00037   char dtunit[MED_SNAME_SIZE+1]="";
00038   med_float *values = NULL;
00039   med_int nstep, nvalues;
00040   med_int ncomponent = 1;
00041   med_int csit, numit, numdt, it;
00042   med_float dt;
00043   med_geometry_type geotype;
00044   med_geometry_type *geotypes = MED_GET_CELL_GEOMETRY_TYPE;
00045   med_int nprofile, pit, profilesize;
00046   char profilename[MED_NAME_SIZE+1]="";
00047   med_int nintegrationpoint;
00048   char localizationname[MED_NAME_SIZE+1]="";
00049   med_int ninterp=0;
00050   char interpname[MED_NAME_SIZE+1]="";
00051   int ret=-1;
00052 
00053   /* open file */
00054   fid = MEDfileOpen("UsesCase_MEDfield_10.med",MED_ACC_RDONLY);
00055   if (fid < 0) {
00056     MESSAGE("ERROR : open file ...");
00057     goto ERROR;
00058   }
00059 
00060   /* 
00061    * ... we know that the MED file has only one field with one component , 
00062    * a real code working would check ... 
00063    */
00064 
00065   /*
00066    * if you know the field name, direct access to field informations
00067    */
00068   if (MEDfieldInfoByName(fid, fieldname, meshname, &localmesh, &fieldtype,
00069                          componentname, componentunit, dtunit, &nstep) < 0) {
00070     MESSAGE("ERROR : Field info by name ...");
00071     goto ERROR;
00072   }
00073   
00074   /* 
00075    * Read how many interpolation family name for the field ?  
00076    */
00077   if ((ninterp = MEDfieldnInterp(fid, fieldname)) < 0) {
00078     MESSAGE("ERROR : Read how many interpolation functions for the field ...");
00079     goto ERROR;
00080   }
00081   /* - Read each interlolation family name 
00082    * - The way to read an interploation family and it's basis functions 
00083    *  is described in UsesCase_MEDinterp_2 and UsesCase_MEDinterp_3 uses case
00084    */
00085   for (it=0; it<ninterp; it++) {
00086     if (MEDfieldInterpInfo(fid,fieldname,it+1,interpname) < 0) {
00087       MESSAGE("ERROR : read interpolation family name ...");
00088       goto ERROR;
00089     }
00090   }
00091 
00092   /*
00093    * Read field values for each computing step
00094    */ 
00095   for (csit=0; csit<nstep; csit++) {
00096 
00097     if (MEDfieldComputingStepInfo(fid, fieldname, csit+1, &numdt, &numit, &dt) < 0) {
00098       MESSAGE("ERROR : Computing step info ...");
00099       goto ERROR;
00100     }
00101 
00102   /* 
00103    * ... In our case, we suppose that the field values are only defined on cells ... 
00104    */
00105     for (it=1; it<=MED_N_CELL_FIXED_GEO; it++) {
00106 
00107       geotype = geotypes[it];
00108       /*
00109        * How many profile for each geometry type ? 
00110        */
00111       if ((nprofile = MEDfieldnProfile(fid, fieldname, numdt, numit, MED_CELL, geotype,
00112                                        profilename, localizationname)) < 0) {
00113         MESSAGE("ERROR : read number of profile ");
00114         goto ERROR;
00115       }     
00116       
00117       /* 
00118        * Read values for each profile
00119        */
00120       for (pit=0; pit<nprofile; pit++) {
00121 
00122         if ((nvalues = MEDfieldnValueWithProfile(fid, fieldname, numdt, numit, MED_CELL, geotype,
00123                                                  pit+1, MED_COMPACT_PFLMODE, profilename, &profilesize,
00124                                                  localizationname, &nintegrationpoint)) < 0) {
00125           MESSAGE("ERROR : read number of values with a profile ...");
00126           goto ERROR;
00127         } 
00128 
00129         if (nvalues) {
00130           if ((values = (med_float *) malloc(sizeof(med_float)*nvalues*ncomponent*nintegrationpoint)) == NULL) {
00131             MESSAGE("ERROR : memory allocation ..."); 
00132             goto ERROR; 
00133           } 
00134           if (MEDfieldValueWithProfileRd(fid, fieldname, numdt, numit, MED_CELL, geotype, 
00135                                          MED_COMPACT_PFLMODE, profilename,   
00136                                          MED_FULL_INTERLACE, MED_ALL_CONSTITUENT,
00137                                          (unsigned char*) values) < 0) { 
00138             MESSAGE("ERROR : read fields values for cells ...");  
00139             free(values);
00140             goto ERROR;  
00141           }   
00142           free(values);
00143         }
00144       }
00145     }
00146   }
00147   
00148   ret=0;
00149  ERROR:
00150    
00151   /* close file */
00152   if (MEDfileClose(fid) < 0) {
00153     MESSAGE("ERROR : close file ...");             
00154     ret=-1; 
00155   } 
00156 
00157   return ret;
00158 }

Généré le Thu Oct 8 14:26:17 2015 pour MED fichier par  doxygen 1.6.1