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UsesCase_MEDmesh_13.c
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1 /* This file is part of MED.
2  *
3  * COPYRIGHT (C) 1999 - 2023 EDF R&D, CEA/DEN
4  * MED is free software: you can redistribute it and/or modify
5  * it under the terms of the GNU Lesser General Public License as published by
6  * the Free Software Foundation, either version 3 of the License, or
7  * (at your option) any later version.
8  *
9  * MED is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public License
15  * along with MED. If not, see <http://www.gnu.org/licenses/>.
16  */
17 
18 /*
19  * Use case 13 : a 2D unstructured mesh with 10 nodes and 2 polygons
20  * poly1 : 1,4,7,9,6,3
21  * poly2 : 2,5,8,10,7,4
22  * 9 10
23  *
24  * 6 7 8
25  *
26  * 3 4 5
27  *
28  * 1 2
29  *
30 */
31 
32 #include <med.h>
33 #define MESGERR 1
34 #include <med_utils.h>
35 
36 #include <string.h>
37 
38 int main (int argc, char **argv) {
39  med_idt fid;
40  const char meshname[MED_NAME_SIZE+1] = "2D unstructured mesh";
41  const med_int spacedim = 2;
42  const med_int meshdim = 2;
43  /* 12345678901234561234567890123456 */
44  const char axisname[2*MED_SNAME_SIZE+1] = "x y ";
45  const char unitname[2*MED_SNAME_SIZE+1] = "cm cm ";
46  /* Dix noeuds dont deux communs aux deux polygones */
47  const med_float coordinates[2*10] = { 0.5, 0.,
48  1.5, 0.,
49  0., 0.5,
50  1., 0.5,
51  2., 0.5,
52  0., 1.,
53  1., 1.,
54  2., 1.,
55  0.5, 2.,
56  1.5, 2. };
57  const med_int nnodes = 10;
58  const med_int indexsize = 3;
59  const med_int index[3] = {1,7,13};
60  /* connectivity : 2 hexagons */
61  const med_int connectivity[12] = {1,4,7,9,6,3,
62  2,5,8,10,7,4};
63  int ret=-1;
64 
65  /* open MED file */
66  fid = MEDfileOpen("UsesCase_MEDmesh_13.med", MED_ACC_CREAT);
67  if (fid < 0) {
68  MESSAGE("ERROR : file creation ...");
69  goto ERROR;
70  }
71 
72  /* write a comment in the file */
73  if (MEDfileCommentWr(fid, "A 2D unstructured mesh : 12, 12 polygons") < 0)
74  { MESSAGE("ERROR : write file description ...");
75  goto ERROR;
76  }
77 
78  /* mesh creation : a 2D unstructured mesh */
79  if (MEDmeshCr(fid, meshname, spacedim, meshdim,
80  MED_UNSTRUCTURED_MESH, "A 2D mesh with 2 polygons",
81  "", MED_SORT_DTIT, MED_CARTESIAN, axisname, unitname) < 0)
82  { MESSAGE("ERROR : mesh creation ...");
83  goto ERROR;
84  }
85 
86  /* nodes coordinates in a cartesian axis in full interlace mode
87  (X1,Y1, X2,Y2, X3,Y3, ...) with no iteration and computation step
88  */
90  MED_FULL_INTERLACE, nnodes, coordinates) < 0)
91  { MESSAGE("ERROR : nodes coordinates ...");
92  goto ERROR;
93  }
94 
95  /* cells connectiviy is defined in nodal mode */
96  /* 2 polygons */
97  if (MEDmeshPolygonWr(fid, meshname, MED_NO_DT, MED_NO_IT, MED_UNDEF_DT,
98  MED_CELL, MED_NODAL, indexsize, index, connectivity) < 0)
99  { MESSAGE("ERROR : polygon connectivity ...");
100  goto ERROR;
101  }
102 
103 
104  /* create family 0 : by default, all mesh entities family number is 0 */
105  if (MEDfamilyCr(fid, meshname, MED_NO_NAME, 0, 0, MED_NO_GROUP) < 0)
106  { MESSAGE("ERROR : family 0 creation ...");
107  goto ERROR;
108  }
109 
110  ret=0;
111  ERROR:
112 
113  /* close MED file */
114  if (MEDfileClose(fid) < 0) {
115  MESSAGE("ERROR : close file ...");
116  ret=-1;
117  }
118 
119  return ret;
120 }
MED_NO_GROUP
#define MED_NO_GROUP
Definition: med.h:291
MED_UNSTRUCTURED_MESH
Definition: med.h:133
MED_SNAME_SIZE
#define MED_SNAME_SIZE
Definition: med.h:84
med_idt
hid_t med_idt
Definition: med.h:333
MESSAGE
#define MESSAGE(chaine)
Definition: med_utils.h:324
MED_FULL_INTERLACE
Definition: med.h:98
med_int
int med_int
Definition: med.h:344
MED_SORT_DTIT
Definition: med.h:311
med_float
double med_float
Definition: med.h:338
MED_NO_DT
#define MED_NO_DT
Definition: med.h:322
MEDfileClose
MEDC_EXPORT med_err MEDfileClose(med_idt fid)
Fermeture d'un fichier MED.
Definition: MEDfileClose.c:30
MEDfamilyCr
MEDC_EXPORT med_err MEDfamilyCr(const med_idt fid, const char *const meshname, const char *const familyname, const med_int familynumber, const med_int ngroup, const char *const groupname)
Cette routine permet la création d'une famille portant sur les entités d'un maillage.
Definition: MEDfamilyCr.c:40
MEDmeshCr
MEDC_EXPORT med_err MEDmeshCr(const med_idt fid, const char *const meshname, const med_int spacedim, const med_int meshdim, const med_mesh_type meshtype, const char *const description, const char *const dtunit, const med_sorting_type sortingtype, const med_axis_type axistype, const char *const axisname, const char *const axisunit)
Cette routine permet de créer un maillage dans un fichier.
Definition: MEDmeshCr.c:45
MED_CELL
Definition: med.h:145
MED_NAME_SIZE
#define MED_NAME_SIZE
Definition: med.h:83
MED_CARTESIAN
Definition: med.h:260
med_utils.h
MEDmeshPolygonWr
MEDC_EXPORT med_err MEDmeshPolygonWr(const med_idt fid, const char *const meshname, const med_int numdt, const med_int numit, const med_float dt, const med_entity_type entitype, const med_connectivity_mode cmode, const med_int indexsize, const med_int *const polyindex, const med_int *const connectivity)
Cette routine permet l'écriture des connectivités de polygones.
Definition: MEDmeshPolygonWr.c:45
MED_UNDEF_DT
#define MED_UNDEF_DT
Definition: med.h:324
med.h
MED_NO_IT
#define MED_NO_IT
Definition: med.h:323
main
int main(int argc, char **argv)
Definition: UsesCase_MEDmesh_13.c:38
MEDfileCommentWr
MEDC_EXPORT med_err MEDfileCommentWr(const med_idt fid, const char *const comment)
Ecriture d'un descripteur dans un fichier MED.
Definition: MEDfileCommentWr.c:34
MEDfileOpen
MEDC_EXPORT med_idt MEDfileOpen(const char *const filename, const med_access_mode accessmode)
Ouverture d'un fichier MED.
Definition: MEDfileOpen.c:42
MEDmeshNodeCoordinateWr
MEDC_EXPORT med_err MEDmeshNodeCoordinateWr(const med_idt fid, const char *const meshname, const med_int numdt, const med_int numit, const med_float dt, const med_switch_mode switchmode, const med_int nentity, const med_float *const coordinates)
Cette routine permet d'écrire dans un maillage le tableau des coordonnées des noeuds,...
Definition: MEDmeshNodeCoordinateWr.c:45
MED_ACC_CREAT
Definition: med.h:125
MED_NO_NAME
#define MED_NO_NAME
Definition: med.h:270
MED_NODAL
Definition: med.h:257