MED fichier: usecases/c/UsesCase_MEDmesh_9.c

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usecases/c/UsesCase_MEDmesh_9.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 an unstructured mesh
*
* Use case 9 : a 2D unstructured mesh with moving grid
* transformation
*/
#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;
/* matrix transformation (step 1) : rotation about the Y-axis : 45 degrees */
const med_float tansfMatrix_step1 [7] = { 0.0, 0.0, 0.0, 0.92388, 0.0, 0.38268, 0.0 };
/* matrix transformation (step 2) : rotation about the Y-axis : 90 degrees */
const med_float tansfMatrix_step2 [7] = { 0.0, 0.0, 0.0, 0.707, 0.0, 0.707, 0.0 };
int ret=-1;
/* open MED file */
fid = MEDfileOpen("UsesCase_MEDmesh_9.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;
}
/* mesh creation : a 2D unstructured mesh */
if (MEDmeshCr(fid, meshname, spacedim, meshdim, MED_UNSTRUCTURED_MESH,
"A 2D structured mesh","",MED_SORT_DTIT, MED_CARTESIAN, axisname, unitname) < 0) {
MESSAGE("ERROR : mesh creation ...");
goto ERROR;
}
/* nodes coordinates in a cartesian axis in full interlace mode
(X1,Y1, X2,Y2, X3,Y3, ...) with no iteration and computation step
*/
if (MEDmeshNodeCoordinateWithProfileWr(fid, meshname, MED_NO_DT, MED_NO_IT, 0.0,
MED_COMPACT_STMODE, MED_NO_PROFILE,
MED_FULL_INTERLACE, MED_ALL_CONSTITUENT,
nnodes, initial_coordinates) < 0) {
MESSAGE("ERROR : nodes coordinates ...");
goto ERROR;
}
/* cells connectiviy is defined in nodal mode */
if (MEDmeshElementConnectivityWithProfileWr(fid, meshname, MED_NO_DT, MED_NO_IT, 0.0,
MED_CELL, MED_TRIA3, MED_NODAL,
MED_COMPACT_STMODE, MED_NO_PROFILE,
MED_FULL_INTERLACE, MED_ALL_CONSTITUENT,
ntria3, triaconnectivity) < 0) {
MESSAGE("ERROR : triangular cells connectivity ...");
goto ERROR;
}
if (MEDmeshElementConnectivityWithProfileWr(fid, meshname, MED_NO_DT, MED_NO_IT, 0.0,
MED_CELL, MED_QUAD4, MED_NODAL,
MED_COMPACT_STMODE, MED_NO_PROFILE,
MED_FULL_INTERLACE, MED_ALL_CONSTITUENT,
nquad4, quadconnectivity) < 0) {
MESSAGE("ERROR : quadrangular cells connectivity ...");
goto ERROR;
}
/*
* Mesh deformation (nodes coordinates) in 2 steps
* A rotation by step for each node
*/
/* STEP 1 : dt1 = 5.5, it = 1*/
if ( MEDmeshNodeCoordinateTrsfWr(fid, meshname, 1, 1, 5.5, tansfMatrix_step1) < 0) {
MESSAGE("Erreur a l'ecriture de la transformation géométrique n°1");
goto ERROR;
}
/* STEP 2 : dt2 = 8.9, it = 1*/
if ( MEDmeshNodeCoordinateTrsfWr(fid, meshname, 2, 2, 8.9, tansfMatrix_step2 ) < 0) {
MESSAGE("Erreur a l'ecriture de la transformation géométrique n°2");
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 : create family ...");
goto ERROR;
}
ret=0;
ERROR:
/* close MED file */
if (MEDfileClose(fid) < 0) {
MESSAGE("ERROR : close file ...");
ret=-1;
}
return ret;
}