# usecases/c/UsesCase_MEDfield_17.c

    /*  This file is part of MED.
     *
     *  COPYRIGHT (C) 1999 - 2012  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/>.
     */

    /*
     * Field use case 17 : write a field in a MED file with
     *                     values defined on integration points
     *                     on struct elements
     */

    #include <med.h>
    #define MESGERR 1
    #include <med_utils.h>

    #include <string.h>

    int main (int argc, char **argv) {
      med_idt fid=0,mfid=0,sfid=0;
      const med_int spacedim = 3;
      const char meshname[MED_NAME_SIZE+1] = "COMPUT_MESH";
      const char fieldname[MED_NAME_SIZE+1] = "TEMPERATURE";
      const med_int ncomponent = 1;
      /*                                      1234567890123456123456*/
      const char componentname[MED_SNAME_SIZE+1] = "TEMP            ";
      const char componentunit[MED_SNAME_SIZE+1] = "CELSIUS         ";
      med_geometry_type geotype=MED_NONE;
      const med_int nbeam = 1;
      char structelementname[MED_NAME_SIZE+1];
      const med_float tempvalue[3*1*4] = { 1.1, 2.2, 3.3, 4.4,
                                           5.5, 6.6, 7.7, 8.8,
                                           9.9, 10.1,11.11, 12.12};
      const char localization[MED_NAME_SIZE+1] = "BEAM_INTEGRATION_POINTS";
      const char localization2[MED_NAME_SIZE+1] = "BEAM_INTEGRATION_TRANSF";
      const med_float elementcoordinate[3*3] = { 0.0,0.0,0.0,
                                                 0.0,0.0,0.0,
                                                 0.0,0.0,0.0,};
      const med_float ipointcoordinate[3*3] = { 0.0,0.0,2.5,
                                                0.0,0.0,3.5,
                                                0.0,0.0,4.5};
      const med_float weight[4] = {1.0/4, 1.0/4, 1.0/4, 1.0/4};
      const char beamsectionname[MED_NAME_SIZE+1]="BEAM_SECTION_MESH";
      const med_int nipoint = 3;
      char interpname[MED_NAME_SIZE+1] = "geometrical transformation";
      const med_int nvariable=2;
      const med_int maxdegree=1;
      const med_int nmaxcoefficient=3;
      const med_int         ncoefficient1_1 = 3;
      const med_int   const power1_1[]         = {0,0,1,0,0,1};
      const med_float const coefficient1_1[]   = {1,-1,-1};
      const med_int         ncoefficient1_2 = 1;
      const med_int   const power1_2[]         = {1,0};
      const med_float const coefficient1_2[]   = {1};
      const med_int         ncoefficient1_3 = 1;
      const med_int   const power1_3[]         = {0,1};
      const med_float const coefficient1_3[]   = {1};
      int ret=-1;

      /* Open file to write the field */
      fid = MEDfileOpen("UsesCase_MEDfield_17.med",MED_ACC_CREAT);
      if (fid < 0) {
        MESSAGE("ERROR : file creation ...");
        goto ERROR;
      }

      if (( mfid=MEDfileObjectsMount(fid,  "UsesCase_MEDstructElement_1.med",MED_MESH_SUPPORT)) < 0 ) {
        MESSAGE("ERROR : file mounting ...");
        goto ERROR;
      }

      if (( sfid=MEDfileObjectsMount(fid,  "UsesCase_MEDstructElement_1.med",MED_ELSTRUCT)) < 0 ) {
        MESSAGE("ERROR : file mounting ...");
        goto ERROR;
      }

      /* Create mesh link */
      if (MEDlinkWr(fid,meshname,"./UsesCase_MEDstructElement_1.med") < 0) {
        MESSAGE("ERROR : create mesh link ...");
        goto ERROR;
      }

      /*
       * Read struct element geometric type
       */
      strcpy(structelementname,MED_BEAM_NAME);
      geotype = MEDstructElementGeotype(fid,structelementname);

      /* create a geometrical transformation fonction */
      if (MEDinterpCr(fid, interpname, geotype, MED_FALSE, nvariable, maxdegree, nmaxcoefficient) < 0) {
        MESSAGE("ERROR : interpolation family creation ...");
        goto ERROR;
      }
      /* Basis functions creation */
      if (MEDinterpBaseFunctionWr(fid,interpname,1,ncoefficient1_1,power1_1,coefficient1_1) < 0) {
        MESSAGE("ERROR : first base function creation ...");
        goto ERROR;
      }

      if (MEDinterpBaseFunctionWr(fid,interpname,2,ncoefficient1_2,power1_2,coefficient1_2) < 0) {
        MESSAGE("ERROR : second base function creation ...");
        goto ERROR;
      }

      if (MEDinterpBaseFunctionWr(fid,interpname,3,ncoefficient1_3,power1_3,coefficient1_3) < 0) {
        MESSAGE("ERROR : third base function creation ...");
        goto ERROR;
      }

      /* create the families of integration points
         for the struct element */
      if (MEDlocalizationWr(fid, localization, geotype, spacedim,
                            elementcoordinate, MED_FULL_INTERLACE,
                            nipoint, ipointcoordinate, weight,
                            MED_NO_INTERPOLATION, beamsectionname) < 0) {
        MESSAGE("ERROR : create famlily of integration points ...");
        goto ERROR;
      }

      if (MEDlocalizationWr(fid, localization2, geotype, spacedim,
                            elementcoordinate, MED_FULL_INTERLACE,
                            nipoint, ipointcoordinate, weight,
                            interpname, beamsectionname) < 0) {
        MESSAGE("ERROR : create famlily of integration points ...");
        goto ERROR;
      }

      /*
       * Temperature  field creation for beam struct element :
       * - 1 component, 3 integration points, 4 cells in the support mesh for each
       *   the section of each integration point
       * - mesh is the 3D computation mesh of UsesCase_MEDstructElement_1 use case.
       */
      if (MEDfieldCr(fid, fieldname, MED_FLOAT64,
                     ncomponent, componentname, componentunit,
                     "ms", meshname) < 0) {
        MESSAGE("ERROR : create field");
        goto ERROR;
      }

      if (MEDfieldValueWithProfileWr(fid, fieldname, MED_NO_DT, MED_NO_IT, MED_UNDEF_DT,
                                     MED_STRUCT_ELEMENT, geotype,
                                     MED_COMPACT_PFLMODE, MED_NO_PROFILE, localization,
                                     MED_FULL_INTERLACE, MED_ALL_CONSTITUENT,
                                     nbeam, (unsigned char*) tempvalue) < 0) {
        MESSAGE("ERROR : write field values on MED_BEAM ");
        goto ERROR;
      }

      if (MEDfieldValueWithProfileWr(fid, fieldname, MED_NO_DT, 1, MED_UNDEF_DT,
                                     MED_STRUCT_ELEMENT, geotype,
                                     MED_COMPACT_PFLMODE, MED_NO_PROFILE, localization2,
                                     MED_FULL_INTERLACE, MED_ALL_CONSTITUENT,
                                     nbeam, (unsigned char*) tempvalue) < 0) {
        MESSAGE("ERROR : write field values on MED_BEAM ");
        goto ERROR;
      }

      /* unmount file objects */

      if ( MEDfileObjectsUnmount(fid, mfid, MED_MESH_SUPPORT) < 0 ) {
        MESSAGE("ERROR : file unmounting ...");
        goto ERROR;
      }

      if ( MEDfileObjectsUnmount(fid, sfid, MED_ELSTRUCT) < 0 ) {
        MESSAGE("ERROR : file unmounting ...");
        goto ERROR;
      }

      ret=0;
     ERROR:

      /* close file */
      if (MEDfileClose(fid) < 0) {
        MESSAGE("ERROR : close file ...");
        ret=-1;
      }

      return ret;
    }