# UsesCase_MEDinterp_2.c

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    00001 /*  This file is part of MED.
    00002  *
    00003  *  COPYRIGHT (C) 1999 - 2012  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  * Interp use case 2 : read an interpolation family with a direct access by name
    00020  * In this example, the interpolation family can be used with
    00021  * the TEMPERATURE field of UsesCase_MEDfield_10 use case
    00022  */
    00023
    00024 #include <med.h>
    00025 #define MESGERR 1
    00026 #include <med_utils.h>
    00027
    00028 #include <string.h>
    00029
    00030 int main (int argc, char **argv) {
    00031   med_idt fid;
    00032   const char interpname[MED_NAME_SIZE+1] = "MED_TRIA3 interpolation family";
    00033   med_geometry_type geotype                    =MED_NONE;
    00034   med_bool          cellnodes                  =MED_FALSE;
    00035   med_int           nbasisfunc              =0;
    00036   med_int           nvariable               =0;
    00037   med_int           maxdegree                  =0;
    00038   med_int           nmaxcoefficient            =0;
    00039   int               basisfuncit                =0;
    00040   int               powerit                    =0;
    00041   med_int           ncoefficient            =0;
    00042   med_int*          power                      =NULL;
    00043   med_float*        coefficient                =NULL;
    00044   int               coefficientit              =0;
    00045   int ret=-1;
    00046
    00047
    00048   /* file creation */
    00049   fid = MEDfileOpen("UsesCase_MEDinterp_1.med",MED_ACC_RDONLY);
    00050   if (fid < 0) {
    00051     MESSAGE("ERROR : file creation ...");
    00052     goto ERROR;
    00053   }
    00054
    00055   /* with direct access by the family name */
    00056   if (MEDinterpInfoByName(fid,interpname,&geotype,&cellnodes,&nbasisfunc,
    00057                           &nvariable,&maxdegree,&nmaxcoefficient) < 0) {
    00058     MESSAGE("ERROR : interpolation function information ...");
    00059     goto ERROR;
    00060   }
    00061
    00062   /* read each basis function */
    00063   for ( basisfuncit=1; basisfuncit<= nbasisfunc; ++basisfuncit) {
    00064
    00065     if ((ncoefficient = MEDinterpBaseFunctionCoefSize(fid,interpname,basisfuncit) ) <0 ) {
    00066       MESSAGE("ERROR : read number of coefficient in the base function ...");
    00067       goto ERROR;
    00068     }
    00069
    00070     coefficient = (med_float*) calloc(sizeof(med_float),ncoefficient);
    00071     power       = (med_int*)   calloc(sizeof(med_int),nvariable*ncoefficient);
    00072
    00073     if (MEDinterpBaseFunctionRd(fid,interpname,basisfuncit,&ncoefficient,power,coefficient) < 0) {
    00074       MESSAGE("ERROR : read base function ...");
    00075       free(coefficient); free(power);
    00076       goto ERROR;
    00077     }
    00078
    00079     free(coefficient);
    00080     free(power);
    00081   }
    00082
    00083   ret=0;
    00084  ERROR:
    00085
    00086
    00087   /* close file */
    00088   if (MEDfileClose(fid) < 0) {
    00089     MESSAGE("ERROR : close file ...");
    00090     ret=-1;
    00091   }
    00092
    00093   return ret;
    00094 }