UsesCase_MEDmesh_9.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  *  How to create an unstructured mesh 
00020  *
00021  *  Use case 9 : a 2D unstructured mesh with moving grid
00022  *  transformation   
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 unstructured 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   const med_float initial_coordinates[30] = { 2.,1.,  7.,1.,  12.,1.,  17.,1.,  22.,1.,
00039                                               2.,6.,  7.,6.,  12.,6.,  17.,6.,  22.,6.,
00040                                               2.,11., 7.,11., 12.,11., 17.,11., 22.,11.};
00041   const med_int nnodes = 15;
00042   const med_int triaconnectivity[24] = { 1,7,6,   2,7,1,  3,7,2,   8,7,3,   
00043                                    13,7,8, 12,7,13, 11,7,12, 6,7,11 };
00044   const med_int ntria3 = 8;
00045   const med_int quadconnectivity[16] = {3,4,9,8,    4,5,10,9, 
00046                                         15,14,9,10, 13,8,9,14};
00047   const med_int nquad4 = 4;
00048   /* matrix transformation (step 1) : rotation about the Y-axis : 45 degrees */
00049   const med_float tansfMatrix_step1 [7] = { 0.0, 0.0, 0.0, 0.92388, 0.0, 0.38268, 0.0 };
00050   /* matrix transformation (step 2) : rotation about the Y-axis : 90 degrees */
00051   const med_float tansfMatrix_step2 [7] = { 0.0, 0.0, 0.0, 0.707,   0.0, 0.707,   0.0 };
00052   int ret=-1;
00053   
00054   /* open MED file */
00055   fid = MEDfileOpen("UsesCase_MEDmesh_9.med",MED_ACC_CREAT);
00056   if (fid < 0) {
00057     MESSAGE("ERROR : file creation ...");
00058     goto ERROR;
00059   }
00060 
00061   /* write a comment in the file */
00062   if (MEDfileCommentWr(fid,"A 2D unstructured mesh : 15 nodes, 12 cells") < 0) {
00063     MESSAGE("ERROR : write file description ...");
00064     goto ERROR;
00065   }
00066 
00067   /* mesh creation : a 2D unstructured mesh */
00068   if (MEDmeshCr(fid, meshname, spacedim, meshdim, MED_UNSTRUCTURED_MESH, 
00069                 "A 2D structured mesh","",MED_SORT_DTIT,MED_CARTESIAN, axisname, unitname) < 0) {
00070     MESSAGE("ERROR : mesh creation ...");
00071     goto ERROR;
00072   }
00073 
00074   /* nodes coordinates in a cartesian axis in full interlace mode 
00075      (X1,Y1, X2,Y2, X3,Y3, ...) with no iteration and computation step 
00076   */
00077   if (MEDmeshNodeCoordinateWithProfileWr(fid, meshname, MED_NO_DT, MED_NO_IT, 0.0,
00078                                          MED_COMPACT_PFLMODE, MED_NO_PROFILE,
00079                                          MED_FULL_INTERLACE, MED_ALL_CONSTITUENT,
00080                                          nnodes, initial_coordinates) < 0) {
00081     MESSAGE("ERROR : nodes coordinates ...");
00082     goto ERROR;
00083   }
00084 
00085   /* cells connectiviy is defined in nodal mode */
00086   if (MEDmeshElementConnectivityWithProfileWr(fid, meshname, MED_NO_DT, MED_NO_IT, 0.0,
00087                                               MED_CELL, MED_TRIA3, MED_NODAL, 
00088                                               MED_COMPACT_PFLMODE, MED_NO_PROFILE,
00089                                               MED_FULL_INTERLACE, MED_ALL_CONSTITUENT, 
00090                                               ntria3, triaconnectivity) < 0) {
00091     MESSAGE("ERROR : triangular cells connectivity ...");
00092     goto ERROR;
00093   }
00094 
00095   if (MEDmeshElementConnectivityWithProfileWr(fid, meshname, MED_NO_DT, MED_NO_IT, 0.0,
00096                                               MED_CELL, MED_QUAD4, MED_NODAL, 
00097                                               MED_COMPACT_PFLMODE, MED_NO_PROFILE,
00098                                               MED_FULL_INTERLACE, MED_ALL_CONSTITUENT,  
00099                                               nquad4, quadconnectivity) < 0) {
00100     MESSAGE("ERROR : quadrangular cells connectivity ..."); 
00101     goto ERROR;
00102   }
00103 
00104   /* 
00105    * Mesh deformation (nodes coordinates) in 2 steps 
00106    * A rotation by step for each node
00107    */ 
00108   /* STEP 1 : dt1 = 5.5, it = 1*/
00109   if ( MEDmeshNodeCoordinateTrsfWr(fid, meshname, 1, 1, 5.5, tansfMatrix_step1) < 0) {
00110     MESSAGE("Erreur a l'ecriture de la transformation géométrique n°1");
00111     goto ERROR;
00112   }
00113 
00114   /* STEP 2 : dt2 = 8.9, it = 1*/
00115   if ( MEDmeshNodeCoordinateTrsfWr(fid, meshname, 2, 2, 8.9, tansfMatrix_step2 ) < 0) {
00116     MESSAGE("Erreur a l'ecriture de la transformation géométrique n°1");
00117     goto ERROR;
00118   }
00119 
00120   /* create family 0 : by default, all mesh entities family number is 0 */
00121   if (MEDfamilyCr(fid, meshname,MED_NO_NAME, 0, 0, MED_NO_GROUP) < 0) {
00122     MESSAGE("ERROR : create family ...");
00123     goto ERROR;
00124   }
00125   
00126   ret=0;
00127  ERROR:
00128 
00129   /* close MED file */
00130   if (MEDfileClose(fid)  < 0) {
00131     MESSAGE("ERROR : close file ...");
00132     ret=-1;
00133   }
00134 
00135   return ret;
00136 }

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