# UsesCase_MEDmesh_6.c

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    00001 /*  This file is part of MED.
    00002  *
    00003  *  COPYRIGHT (C) 1999 - 2011  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 structured 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 }