UsesCase_MEDmesh_6.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 6 : a 2D unstructured mesh with the following features 
00022  *  computin steps, profiles and nodes coordinates evolution.
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   /* new coordinates (step 1) for nodes 13, 14 and 15 */
00049   const med_float new_coordinates_step1 [6] = { 12.,15., 17.,15., 22.,15.};
00050   const char profile1name[MED_NAME_SIZE+1] = "UPPER_QUAD4_PROFILE";
00051   const med_int profile1[3] = {13, 14, 15}; 
00052   const med_int profile1size = 3;
00053   /* new coordinates (step 2) for nodes 8, 9 and 10 */
00054   const med_float new_coordinates_step2 [6] = { 12.,10., 17.,10., 22.,10.};
00055   const char profile2name[MED_NAME_SIZE+1] = "MIDDLE_QUAD4_PROFILE";
00056   const med_int profile2[3] = {8, 9, 10}; 
00057   const med_int profile2size = 3;
00058   int ret=-1;
00059   
00060   
00061   /* open MED file */
00062   fid = MEDfileOpen("UsesCase_MEDmesh_6.med",MED_ACC_CREAT);
00063   if (fid < 0) {
00064     MESSAGE("ERROR : file creation ...");
00065     goto ERROR;
00066   }
00067 
00068   /* write a comment in the file */
00069   if (MEDfileCommentWr(fid,"A 2D unstructured mesh : 15 nodes, 12 cells") < 0) {
00070     MESSAGE("ERROR : write file description ...");
00071     goto ERROR;
00072   }
00073 
00074   /* create the profiles in the file */
00075   if (MEDprofileWr(fid, profile1name, profile1size, profile1 ) < 0) {
00076     MESSAGE("ERROR : create profile ...");
00077     goto ERROR; 
00078   }
00079 
00080   if (MEDprofileWr(fid, profile2name, profile2size, profile2 ) < 0) {
00081     MESSAGE("ERROR : create profile ...");
00082     goto ERROR; 
00083   }
00084   
00085   /* mesh creation : a 2D unstructured mesh */
00086   if (MEDmeshCr(fid, meshname, spacedim, meshdim, MED_UNSTRUCTURED_MESH, 
00087                 "A 2D unstructured mesh","",MED_SORT_DTIT,MED_CARTESIAN, axisname, unitname) < 0) {
00088     MESSAGE("ERROR : mesh creation ...");
00089     goto ERROR;
00090   }
00091 
00092   /* initial nodes coordinates in a cartesian axis in full interlace mode 
00093      (X1,Y1, X2,Y2, X3,Y3, ...) 
00094   */
00095   if (MEDmeshNodeCoordinateWithProfileWr(fid, meshname, MED_NO_DT, MED_NO_IT, 0.0,
00096                                          MED_COMPACT_PFLMODE, MED_NO_PROFILE,
00097                                          MED_FULL_INTERLACE, MED_ALL_CONSTITUENT,
00098                                          nnodes, initial_coordinates) < 0) {
00099     MESSAGE("ERROR : nodes coordinates ...");
00100     goto ERROR;
00101   }
00102 
00103   /* cells connectiviy is defined in nodal mode */
00104   if (MEDmeshElementConnectivityWithProfileWr(fid, meshname, MED_NO_DT, MED_NO_IT, 0.0,
00105                                               MED_CELL, MED_TRIA3, MED_NODAL, 
00106                                               MED_COMPACT_PFLMODE, MED_NO_PROFILE,
00107                                               MED_FULL_INTERLACE, MED_ALL_CONSTITUENT, 
00108                                               ntria3, triaconnectivity) < 0) {
00109     MESSAGE("ERROR : triangular cells connectivity ...");
00110     goto ERROR;
00111   }
00112 
00113   if (MEDmeshElementConnectivityWithProfileWr(fid, meshname, MED_NO_DT, MED_NO_IT, 0.0,
00114                                               MED_CELL, MED_QUAD4, MED_NODAL, 
00115                                               MED_COMPACT_PFLMODE, MED_NO_PROFILE,
00116                                               MED_FULL_INTERLACE, MED_ALL_CONSTITUENT,  
00117                                               nquad4, quadconnectivity) < 0) {
00118     MESSAGE("ERROR : quadrangular cells connectivity ..."); 
00119     goto ERROR;
00120   }
00121 
00122   /* 
00123    * Mesh deformation (nodes coordinates) in 2 steps 
00124    * The nodes modified are identified by a profile 
00125    */ 
00126   /* STEP 1 : dt1 = 5.5, it = 1*/
00127   if (MEDmeshNodeCoordinateWithProfileWr(fid, meshname, 1, 1, 5.5,
00128                                          MED_COMPACT_PFLMODE, profile1name,
00129                                          MED_FULL_INTERLACE, MED_ALL_CONSTITUENT,
00130                                          nnodes, new_coordinates_step1 ) < 0) {
00131     MESSAGE("ERROR : nodes coordinates ...");
00132     goto ERROR;
00133   }
00134   /* STEP 2 : dt2 = 8.9, it = 1*/
00135   if (MEDmeshNodeCoordinateWithProfileWr(fid, meshname, 2, 1, 8.9,
00136                                          MED_COMPACT_PFLMODE, profile2name,
00137                                          MED_FULL_INTERLACE, MED_ALL_CONSTITUENT,
00138                                          nnodes, new_coordinates_step2 ) < 0) {
00139     MESSAGE("ERROR : nodes coordinates ...");
00140     goto ERROR;
00141   }
00142 
00143   /* create family 0 : by default, all mesh entities family number is 0 */
00144   if (MEDfamilyCr(fid, meshname,MED_NO_NAME, 0, 0, MED_NO_GROUP) < 0) {
00145     MESSAGE("ERROR : quadrangular cells connectivity ...");
00146     goto ERROR;
00147   }
00148   
00149   ret=0;
00150  ERROR:
00151   
00152   /* close MED file */
00153   if (MEDfileClose(fid)  < 0) {
00154     MESSAGE("ERROR : close file ...");
00155     ret=-1;
00156   }
00157 
00158   return ret;
00159 }

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