# UsesCase_MEDfield_4.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  * Field use case 4 : write a field with computing steps
    00020  */
    00021
    00022
    00023 #include <med.h>
    00024 #define MESGERR 1
    00025 #include <med_utils.h>
    00026
    00027 #include <string.h>
    00028
    00029
    00030 int main (int argc, char **argv) {
    00031   med_idt fid;
    00032   const char meshname[MED_NAME_SIZE+1] = "2D unstructured mesh";
    00033   const char fieldname[MED_NAME_SIZE+1] = "TEMPERATURE_FIELD";
    00034   const med_int ncomponent = 1;
    00035   const char componentname[MED_SNAME_SIZE+1] = "TEMPERATURE";
    00036   const char componentunit[MED_SNAME_SIZE+1] = "C";
    00037   const med_int ntria3 = 8;
    00038   const med_int nquad4 = 4;
    00039   const med_float tria3values_step1[8] = {1000., 2000., 3000., 4000.,
    00040                                           5000., 6000., 7000., 8000.};
    00041   const med_float quad4values_step1[4] = {10000., 20000., 30000., 4000.};
    00042   const med_float tria3values_step2[8] = {1500., 2500., 3500., 4500.,
    00043                                           5500., 6500., 7500., 8500.};
    00044   const med_float quad4values_step2[4] = {15000., 25000., 35000., 45000.};
    00045   int ret=-1;
    00046
    00047   /* file creation */
    00048   fid = MEDfileOpen("UsesCase_MEDfield_4.med",MED_ACC_CREAT);
    00049   if (fid < 0) {
    00050     MESSAGE("ERROR : file creation ...");
    00051     goto ERROR;
    00052   }
    00053
    00054   /* create mesh link */
    00055   if (MEDlinkWr(fid,meshname,"./UsesCase_MEDmesh_1.med") < 0) {
    00056     MESSAGE("ERROR : create mesh link ...");
    00057     goto ERROR;
    00058   }
    00059
    00060   /* field creation : temperature field  : 1 component in celsius degree
    00061    *                  the mesh is the 2D unstructured mesh of UsecaseMEDmesh_1.c
    00062    *                  use case. Computation step unit in 'ms'
    00063    */
    00064   if (MEDfieldCr(fid, fieldname, MED_FLOAT64,
    00065                  ncomponent, componentname, componentunit,"ms", meshname) < 0) {
    00066     MESSAGE("ERROR : create field");
    00067     goto ERROR;
    00068   }
    00069
    00070   /* two computation steps :
    00071    *  - first  on meshname MED_NO_DT,MED_NO_IT mesh computation step
    00072    *  - second on meshname 1,3 mesh computation step */
    00073   /* write values at cell centers : 8 MED_TRIA3 and 4 MED_QUAD4 */
    00074
    00075   /* STEP 1 : dt1 = 5.5, it = 1*/
    00076   /* MED_TRIA3 */
    00077   if (MEDfieldValueWr(fid, fieldname, 1, 1, 5.5, MED_CELL, MED_TRIA3, MED_FULL_INTERLACE,
    00078                       MED_ALL_CONSTITUENT, ntria3, (unsigned char*) tria3values_step1) < 0) {
    00079     MESSAGE("ERROR : write field values on MED_TRIA3");
    00080     goto ERROR;
    00081   }
    00082    /* MED_QUAD4 */
    00083   if (MEDfieldValueWr(fid, fieldname, 1, 1, 5.5, MED_CELL,MED_QUAD4, MED_FULL_INTERLACE,
    00084                       MED_ALL_CONSTITUENT, nquad4, (unsigned char*) quad4values_step1) < 0) {
    00085     MESSAGE("ERROR : write field values on MED_QUAD4 ");
    00086     goto ERROR;
    00087   }
    00088
    00089   /* STEP 2 : dt2 = 8.9, it = 1*/
    00090   /* MED_TRIA3 */
    00091   if (MEDfieldValueWr(fid, fieldname, 2 , 1 , 8.9 , MED_CELL, MED_TRIA3, MED_FULL_INTERLACE,
    00092                       MED_ALL_CONSTITUENT, ntria3,  (unsigned char*)tria3values_step2) < 0) {
    00093     MESSAGE("ERROR : write field values on MED_TRIA3");
    00094     goto ERROR;
    00095   }
    00096
    00097   /* MED_QUAD4 */
    00098   if (MEDfieldValueWr(fid, fieldname, 2, 1, 8.9, MED_CELL, MED_QUAD4, MED_FULL_INTERLACE,
    00099                       MED_ALL_CONSTITUENT, nquad4, (unsigned char*)quad4values_step2) < 0) {
    00100     MESSAGE("ERROR : write field values on MED_QUAD4 ");
    00101     goto ERROR;
    00102   }
    00103
    00104   /* Write associated mesh computation step */
    00105   if ( MEDfieldComputingStepMeshWr(fid, fieldname, 2, 1,
    00106                                    1, 3 ) < 0 ) {
    00107     MESSAGE("ERROR : write field mesh computation step error ");
    00108     goto ERROR;
    00109   }
    00110
    00111   ret=0;
    00112  ERROR:
    00113
    00114   /* close file */
    00115   if (MEDfileClose(fid) < 0) {
    00116     MESSAGE("ERROR : close file ...");
    00117     ret=-1;
    00118   }
    00119
    00120   return ret;
    00121 }
    00122