deletetetras.cpp

   1 //
   2 // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
   3 // +                                                                      +
   4 // + This file is part of enGrid.                                         +
   5 // +                                                                      +
   6 // + Copyright 2008,2009 Oliver Gloth                                     +
   7 // +                                                                      +
   8 // + enGrid is free software: you can redistribute it and/or modify       +
   9 // + it under the terms of the GNU General Public License as published by +
  10 // + the Free Software Foundation, either version 3 of the License, or    +
  11 // + (at your option) any later version.                                  +
  12 // +                                                                      +
  13 // + enGrid is distributed in the hope that it will be useful,            +
  14 // + but WITHOUT ANY WARRANTY; without even the implied warranty of       +
  15 // + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        +
  16 // + GNU General Public License for more details.                         +
  17 // +                                                                      +
  18 // + You should have received a copy of the GNU General Public License    +
  19 // + along with enGrid. If not, see <http://www.gnu.org/licenses/>.       +
  20 // +                                                                      +
  21 // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  22 //
  23 #include "deletetetras.h"
  24
  25 void DeleteTetras::operate()
  26 {
  27   cout << "deleting tetrahedral cells" << endl;
  28   EG_VTKSP(vtkUnstructuredGrid, new_grid);
  29   QVector<vtkIdType> tetras, cells, nodes, _nodes;
  30   getAllCellsOfType(VTK_TETRA, tetras, grid);
  31   getRestCells(grid, tetras, cells);
  32   getNodesFromCells(cells, nodes, grid);
  33   allocateGrid(new_grid, cells.size(), nodes.size());
  34   QVector<vtkIdType> old2new(grid->GetNumberOfPoints(), -1);
  35   {
  36     vtkIdType id_new = 0;
  37     foreach (vtkIdType id_node, nodes) {
  38       vec3_t x;
  39       grid->GetPoints()->GetPoint(id_node, x.data());
  40       new_grid ->GetPoints()->SetPoint(id_new, x.data());
  41       copyNodeData(grid, id_node, new_grid, id_new);
  42       old2new[id_node] = id_new;
  43       ++id_new;
  44     };
  45   };
  46   foreach (vtkIdType id_cell, cells) {
  47     vtkIdType *pts, N_pts;
  48     grid->GetCellPoints(id_cell, N_pts, pts);
  49     QVector<vtkIdType> new_pts(N_pts);
  50     for (int i = 0; i < N_pts; ++i) {
  51       new_pts[i] = old2new[pts[i]];
  52     };
  53     vtkIdType cellType = grid->GetCellType(id_cell);
  54     vtkIdType id_new = new_grid->InsertNextCell(cellType, N_pts, new_pts.data());
  55     copyCellData(grid, id_cell, new_grid, id_new);
  56   };
  57   makeCopy(new_grid, grid);
  58 };
  59