src/libengrid/surfacemesher.cpp

   1 // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
   2 // +                                                                      +
   3 // + This file is part of enGrid.                                         +
   4 // +                                                                      +
   5 // + Copyright 2008-2014 enGits GmbH                                      +
   6 // +                                                                      +
   7 // + enGrid is free software: you can redistribute it and/or modify       +
   8 // + it under the terms of the GNU General Public License as published by +
   9 // + the Free Software Foundation, either version 3 of the License, or    +
  10 // + (at your option) any later version.                                  +
  11 // +                                                                      +
  12 // + enGrid is distributed in the hope that it will be useful,            +
  13 // + but WITHOUT ANY WARRANTY; without even the implied warranty of       +
  14 // + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        +
  15 // + GNU General Public License for more details.                         +
  16 // +                                                                      +
  17 // + You should have received a copy of the GNU General Public License    +
  18 // + along with enGrid. If not, see <http://www.gnu.org/licenses/>.       +
  19 // +                                                                      +
  20 // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  21
  22 #include "surfacemesher.h"
  23 #include "guimainwindow.h"
  24 #include "meshqualityfaceorientation.h"
  25
  26 #include "laplacesmoother.h"
  27
  28 SurfaceMesher::SurfaceMesher() : SurfaceAlgorithm()
  29 {
  30   EG_TYPENAME;
  31   m_PerformGeometricTests = true;
  32   getSet("surface meshing", "use surface projection for smoothing", true,  m_UseProjectionForSmoothing);
  33   getSet("surface meshing", "use normal correction for smoothing",  false, m_UseNormalCorrectionForSmoothing);
  34   getSet("surface meshing", "allow feature edge swapping",          false, m_AllowFeatureEdgeSwapping);
  35   getSet("surface meshing", "correct curvature",                    false, m_CorrectCurvature);
  36   //m_EdgeAngle = m_FeatureAngle;
  37 }
  38
  39 void SurfaceMesher::operate()
  40 {
  41   if (!GuiMainWindow::pointer()->checkCadInterfaces()) {
  42     GuiMainWindow::pointer()->storeCadInterfaces();
  43   }
  44   prepare();
  45   //computeMeshDensity(); //!!
  46   //prepare(); //!!
  47   if (m_BoundaryCodes.size() == 0) {
  48     return;
  49   }
  50   EG_VTKDCN(vtkDoubleArray, characteristic_length_desired, m_Grid, "node_meshdensity_desired");
  51   for (vtkIdType id_node = 0; id_node < m_Grid->GetNumberOfPoints(); ++id_node) {
  52     characteristic_length_desired->SetValue(id_node, 1e-6);
  53   }
  54   updateNodeInfo();
  55   int num_inserted = 0;
  56   int num_deleted = 0;
  57   int iter = 0;
  58   bool done = (iter >= m_NumMaxIter);
  59   //int Nfull = 0;
  60   //int Nhalf = 0;
  61   while (!done) {
  62     ++iter;
  63     cout << "surface mesher iteration " << iter << ":" << endl;
  64     computeMeshDensity();
  65     //return;
  66     num_inserted = insertNodes();
  67     cout << "  inserted nodes : " << num_inserted << endl;
  68     updateNodeInfo();
  69     swap();
  70     //computeMeshDensity(); //!!
  71     updateNodeInfo();
  72     num_deleted = deleteNodes();
  73     cout << "  deleted nodes : " << num_deleted << endl;
  74     //computeMeshDensity(); // !!
  75     updateNodeInfo();
  76     for (int i = 0; i < m_NumSmoothSteps; ++i) {
  77       smooth(1, m_CorrectCurvature);
  78       swap();
  79     }
  80     //int N_crit = m_Grid->GetNumberOfPoints()/100;
  81     done = (iter >= m_NumMaxIter);
  82     cout << "  total nodes : " << m_Grid->GetNumberOfPoints() << endl;
  83     cout << "  total cells : " << m_Grid->GetNumberOfCells() << endl;
  84     double change_ratio = 0;
  85     double fluctuation_ratio = 0;
  86     {
  87       double N_new = m_Grid->GetNumberOfPoints();
  88       double N_chg = num_inserted - num_deleted;
  89       double N_max = max(num_inserted, num_deleted);
  90       double N_old = N_new - N_chg;
  91       change_ratio = 0.1*int(1000*N_chg/N_old);
  92       fluctuation_ratio = 0.1*int(1000*N_max/N_old);
  93     }
  94     cout << "  change ratio : " << change_ratio << "%" << endl;
  95     cout << "  fluctuation ratio : " << fluctuation_ratio << "%" << endl;
  96     /*
  97     if (!m_BCodeFeatureDefinition) {
  98       MeshQualityFaceOrientation quality1;
  99       quality1();
 100       quality1.printCellInfo(2);
 101     }
 102     */
 103   }
 104   createIndices(m_Grid);
 105   updateNodeInfo();
 106   //computeMeshDensity(); //!!
 107 }