UsesCase_MEDmesh_4.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 /*
00020  *  How to create a structured mesh 
00021  *
00022  *  Use case 4 :  write a 2D structured mesh (5x3 cartesian grid)
00023  */
00024 
00025 #include <med.h>
00026 #define MESGERR 1
00027 #include <med_utils.h>
00028 
00029 #include <string.h>
00030 
00031 int main (int argc, char **argv) {
00032   med_idt fid;
00033   const char meshname[MED_NAME_SIZE+1] = "2D structured mesh";
00034   const med_int spacedim = 2;
00035   const med_int meshdim = 2;
00036   const char axisname[2*MED_SNAME_SIZE+1] = "x               y               ";
00037   const char unitname[2*MED_SNAME_SIZE+1] = "cm              cm              ";
00038   med_int axis, size ;
00039   const med_float cooXaxis[5] = {1.,2.,3.,4.,5.};
00040   const med_float cooYaxis[3] = {1.,2.,3.};
00041   /*                    12345678901234561234567890123456123456789012345612345678901234561234567890123456123456789012345612345678901234561234567890123456 */
00042   const char cellsnames[8*MED_SNAME_SIZE+1] = "CELL_1          CELL_2          CELL_3          CELL_4          CELL_5          CELL_6          CELL_7          CELL_8          ";
00043   const med_int nquad4 = 8;
00044   int ret=-1;
00045 
00046   /* MED file creation */
00047   fid = MEDfileOpen("UsesCase_MEDmesh_4.med",MED_ACC_CREAT);
00048   if (fid < 0) {
00049     MESSAGE("ERROR : file creation ...");
00050     goto ERROR;
00051   }
00052 
00053   /* create the structured mesh in the MED file */
00054   if (MEDmeshCr(fid, meshname, spacedim, meshdim, MED_STRUCTURED_MESH,  
00055                 "A 2D structured mesh","",MED_SORT_DTIT,
00056                 MED_CARTESIAN, axisname, unitname) < 0) {
00057     MESSAGE("ERROR : mesh creation ...");
00058     goto ERROR;
00059   }
00060   
00061   /* specify the grid type : MED_CARTESIAN_GRID */
00062    if (MEDmeshGridTypeWr(fid,meshname, MED_CARTESIAN_GRID) < 0) {
00063     MESSAGE("ERROR : write grid type ...");
00064     goto ERROR;
00065   }
00066   
00067    /* write axis "X" and "Y" coordinates */ 
00068    axis = 1;
00069    size = 5;
00070    if (MEDmeshGridIndexCoordinateWr(fid, meshname, MED_NO_DT, MED_NO_IT,0.0, 
00071                                     axis, size, cooXaxis) < 0) {
00072      MESSAGE("ERROR : write of axis X coordinates ...");
00073      goto ERROR;
00074    }
00075   axis++;
00076   size = 3;
00077   if (MEDmeshGridIndexCoordinateWr(fid, meshname, MED_NO_DT, MED_NO_IT,0.0, 
00078                                    axis, size, cooYaxis) < 0) {
00079     MESSAGE("ERROR : write of axis Y coordinates ...");
00080     goto ERROR;
00081   }
00082 
00083   /* optionnal : names for nodes or elements */
00084   /* In this case, a name is given to the cells of the mesh */
00085   if (MEDmeshEntityNameWr(fid, meshname, MED_NO_DT, MED_NO_IT,
00086                           MED_CELL, MED_QUAD4, nquad4, 
00087                           cellsnames) < 0) {
00088     MESSAGE("ERROR : cells names  ...");
00089     goto ERROR;
00090   }
00091   
00092   /* create family 0 : by default, all mesh entities family number is 0 */
00093   if (MEDfamilyCr(fid, meshname,MED_NO_NAME, 0, 0, MED_NO_GROUP) < 0) {
00094     MESSAGE("ERROR : quadrangular cells connectivity ...");
00095     goto ERROR;
00096   }
00097   
00098   ret = 0;
00099  ERROR:
00100 
00101   /* close MED file  */
00102   if (MEDfileClose(fid) < 0) {
00103     MESSAGE("ERROR : close file ...");             
00104     ret = -1; 
00105   } 
00106 
00107   return ret;
00108 }
00109 

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