MED fichier
usecases/c/UsesCase_MEDmesh_6.c
/* This file is part of MED.
*
* COPYRIGHT (C) 1999 - 2016 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 an unstructured mesh
*
* Use case 6 : a 2D unstructured mesh with the following features
* computin steps, profiles and nodes coordinates evolution.
*/
#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 unstructured 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 ";
const med_float initial_coordinates[30] = { 2.,1., 7.,1., 12.,1., 17.,1., 22.,1.,
2.,6., 7.,6., 12.,6., 17.,6., 22.,6.,
2.,11., 7.,11., 12.,11., 17.,11., 22.,11.};
const med_int nnodes = 15;
const med_int triaconnectivity[24] = { 1,7,6, 2,7,1, 3,7,2, 8,7,3,
13,7,8, 12,7,13, 11,7,12, 6,7,11 };
const med_int ntria3 = 8;
const med_int quadconnectivity[16] = {3,4,9,8, 4,5,10,9,
15,14,9,10, 13,8,9,14};
const med_int nquad4 = 4;
/* new coordinates (step 1) for nodes 13, 14 and 15 */
const med_float new_coordinates_step1 [6] = { 12.,15., 17.,15., 22.,15.};
const char profile1name[MED_NAME_SIZE+1] = "UPPER_QUAD4_PROFILE";
const med_int profile1[3] = {13, 14, 15};
const med_int profile1size = 3;
/* new coordinates (step 2) for nodes 8, 9 and 10 */
const med_float new_coordinates_step2 [6] = { 12.,10., 17.,10., 22.,10.};
const char profile2name[MED_NAME_SIZE+1] = "MIDDLE_QUAD4_PROFILE";
const med_int profile2[3] = {8, 9, 10};
const med_int profile2size = 3;
int ret=-1;
/* open MED file */
fid = MEDfileOpen("UsesCase_MEDmesh_6.med",MED_ACC_CREAT);
if (fid < 0) {
MESSAGE("ERROR : file creation ...");
goto ERROR;
}
/* write a comment in the file */
if (MEDfileCommentWr(fid,"A 2D unstructured mesh : 15 nodes, 12 cells") < 0) {
MESSAGE("ERROR : write file description ...");
goto ERROR;
}
/* create the profiles in the file */
if (MEDprofileWr(fid, profile1name, profile1size, profile1 ) < 0) {
MESSAGE("ERROR : create profile ...");
goto ERROR;
}
if (MEDprofileWr(fid, profile2name, profile2size, profile2 ) < 0) {
MESSAGE("ERROR : create profile ...");
goto ERROR;
}
/* mesh creation : a 2D unstructured mesh */
if (MEDmeshCr(fid, meshname, spacedim, meshdim, MED_UNSTRUCTURED_MESH,
"A 2D unstructured mesh","",MED_SORT_DTIT,MED_CARTESIAN, axisname, unitname) < 0) {
MESSAGE("ERROR : mesh creation ...");
goto ERROR;
}
/* initial nodes coordinates in a cartesian axis in full interlace mode
(X1,Y1, X2,Y2, X3,Y3, ...)
*/
nnodes, initial_coordinates) < 0) {
MESSAGE("ERROR : nodes coordinates ...");
goto ERROR;
}
/* cells connectiviy is defined in nodal mode */
ntria3, triaconnectivity) < 0) {
MESSAGE("ERROR : triangular cells connectivity ...");
goto ERROR;
}
nquad4, quadconnectivity) < 0) {
MESSAGE("ERROR : quadrangular cells connectivity ...");
goto ERROR;
}
/*
* Mesh deformation (nodes coordinates) in 2 steps
* The nodes modified are identified by a profile
*/
/* STEP 1 : dt1 = 5.5, it = 1*/
if (MEDmeshNodeCoordinateWithProfileWr(fid, meshname, 1, 1, 5.5,
MED_COMPACT_STMODE, profile1name,
nnodes, new_coordinates_step1 ) < 0) {
MESSAGE("ERROR : nodes coordinates ...");
goto ERROR;
}
/* STEP 2 : dt2 = 8.9, it = 1*/
if (MEDmeshNodeCoordinateWithProfileWr(fid, meshname, 2, 1, 8.9,
MED_COMPACT_STMODE, profile2name,
nnodes, new_coordinates_step2 ) < 0) {
MESSAGE("ERROR : nodes coordinates ...");
goto ERROR;
}
/* 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 : quadrangular cells connectivity ...");
goto ERROR;
}
ret=0;
ERROR:
/* close MED file */
if (MEDfileClose(fid) < 0) {
MESSAGE("ERROR : close file ...");
ret=-1;
}
return ret;
}