# UsesCase_MEDmesh_9.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 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 }