MED fichier: usecases/c/UsesCase_MEDmesh_4.c

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usecases/c/UsesCase_MEDmesh_4.c
/* This file is part of MED.
*
* COPYRIGHT (C) 1999 - 2019 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/>.
*/
/*
* How to create a structured mesh
*
* Use case 4 : write a 2D structured mesh (5x3 cartesian grid)
*/
#include <med.h>
#define MESGERR 1
#include <med_utils.h>
#include <string.h>
int main (int argc, char **argv) {
med_idt fid;
const char meshname[MED_NAME_SIZE+1] = "2D structured mesh";
const med_int spacedim = 2;
const med_int meshdim = 2;
const char axisname[2*MED_SNAME_SIZE+1] = "x y ";
const char unitname[2*MED_SNAME_SIZE+1] = "cm cm ";
med_int axis, size ;
const med_float cooXaxis[5] = {1.,2.,3.,4.,5.};
const med_float cooYaxis[3] = {1.,2.,3.};
const med_int nquad4 = 8;
/* 12345678901234561234567890123456123456789012345612345678901234561234567890123456123456789012345612345678901234561234567890123456 */
const char cellsnames[8*MED_SNAME_SIZE+1] = "CELL_1 CELL_2 CELL_3 CELL_4 CELL_5 CELL_6 CELL_7 CELL_8 ";
const char familyname [MED_NAME_SIZE+1] = "CART_GRID_QUAD_FAMILY";
const char groupname [MED_LNAME_SIZE+1] = "CART_GRID_GROUP";
const med_int familynumbers[8] = { -1, -1, -1, -1, -1, -1, -1, -1 };
int ret=-1;
/* MED file creation */
fid = MEDfileOpen("UsesCase_MEDmesh_4.med",MED_ACC_CREAT);
if (fid < 0) {
MESSAGE("ERROR : file creation ...");
goto ERROR;
}
/* create the structured mesh in the MED file */
if (MEDmeshCr(fid, meshname, spacedim, meshdim, MED_STRUCTURED_MESH,
"A 2D structured mesh","",MED_SORT_DTIT,
MED_CARTESIAN, axisname, unitname) < 0) {
MESSAGE("ERROR : mesh creation ...");
goto ERROR;
}
/* specify the grid type : MED_CARTESIAN_GRID */
if (MEDmeshGridTypeWr(fid,meshname, MED_CARTESIAN_GRID) < 0) {
MESSAGE("ERROR : write grid type ...");
goto ERROR;
}
/* write axis "X" and "Y" coordinates */
axis = 1;
size = 5;
if (MEDmeshGridIndexCoordinateWr(fid, meshname, MED_NO_DT, MED_NO_IT,0.0,
axis, size, cooXaxis) < 0) {
MESSAGE("ERROR : write of axis X coordinates ...");
goto ERROR;
}
axis++;
size = 3;
if (MEDmeshGridIndexCoordinateWr(fid, meshname, MED_NO_DT, MED_NO_IT,0.0,
axis, size, cooYaxis) < 0) {
MESSAGE("ERROR : write of axis Y coordinates ...");
goto ERROR;
}
/* optionnal : names for nodes or elements */
/* In this case, a name is given to the cells of the mesh */
if (MEDmeshEntityNameWr(fid, meshname, MED_NO_DT, MED_NO_IT,
MED_CELL, MED_QUAD4, nquad4, cellsnames) < 0) {
MESSAGE("ERROR : cells names ...");
goto ERROR;
}
/* We have to create family 0 : by default, all mesh entities family number is 0 */
if (MEDfamilyCr(fid, meshname, MED_NO_NAME, 0, 0, MED_NO_GROUP) < 0) {
MESSAGE("ERROR : family 0 creation ...");
goto ERROR;
}
/* We decide to create a family for boundary quad4 :
by convention a nodes family number is > 0 and an element family number is < 0 */
if (MEDfamilyCr(fid, meshname,familyname, 1, -1, groupname) < 0) {
MESSAGE("ERROR : family creation ...");
goto ERROR;
}
/* Then we write family number for quad4 */
if (MEDmeshEntityFamilyNumberWr(fid, meshname, MED_NO_DT, MED_NO_IT,
MED_CELL, MED_QUAD4, nquad4, familynumbers) < 0) {
MESSAGE("ERROR : nodes family numbers ...");
goto ERROR;
}
ret = 0;
ERROR:
/* close MED file */
if (MEDfileClose(fid) < 0) {
MESSAGE("ERROR : close file ...");
ret = -1;
}
return ret;
}