Rectify_Mesh.cpp

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#include <Rectify_Mesh.h>
#include <Domaine.h>
#include <Scatter.h>
#include <Synonyme_info.h>
 
 
Implemente_instanciable(Rectify_Mesh,"Rectify_Mesh",Interprete_geometrique_base) ;
Add_synonym(Rectify_Mesh,"Orienter_Simplexes");
// XD rectify_mesh interprete rectify_mesh INHERITS_BRACE Keyword to raffine a mesh
// XD attr domain_name ref_domaine domain_name REQ Name of domain.
 
Sortie& Rectify_Mesh::printOn(Sortie& os) const
{
  Interprete::printOn(os);
  return os;
}
 
Entree& Rectify_Mesh::readOn(Entree& is)
{
  Interprete::readOn(is);
  return is;
}
 
Entree& Rectify_Mesh::interpreter_(Entree& is)
{
  associer_domaine(is);
  apply();
  return is;
}
 
void Rectify_Mesh::apply()
{
  Cerr << "Rectifying domain " << domaine().le_nom() << finl;
 
  check_dimension();
  check_cell_type();
 
  if ( Objet_U::dimension == 2 )
    {
      apply_2D();
    }
  else
    {
      apply_3D();
    }
 
  Cerr << "Rectification... OK" << finl;
}
 
void Rectify_Mesh::check_dimension() const
{
  if ( ! ( (Objet_U::dimension == 2) || (Objet_U::dimension == 3) ) )
    {
      Cerr << "Error in 'Rectify_Mesh::check_dimension()':" << finl;
      Cerr << "  Invalid dimension: " << Objet_U::dimension << finl;
      Cerr << "  Rectify_Mesh can only deal 2D or 3D domains" << finl;
      Process::exit();
    }
}
 
void Rectify_Mesh::check_cell_type() const
{
  const Nom& cell_type = domaine().type_elem()->que_suis_je();
 
  if ( ! ( (cell_type == Motcle("Triangle")) || (cell_type == Motcle("Tetraedre")) ) )
    {
      Cerr << "Error in 'Rectify_Mesh::check_cell_type()':" << finl;
      Cerr << "  Invalid cell type: " << cell_type << finl;
      Cerr << "  Rectify_Mesh can only deal with triangles and tetrahedrons" << finl;
      Process::exit();
    }
}
 
void Rectify_Mesh::apply_2D()
{
  Domaine& domain = domaine();
  Scatter::uninit_sequential_domain(domain);
 
  assert( domain.type_elem()->que_suis_je() == Motcle("Triangle") );
 
  check_cell_orientation_2D();
 
  Scatter::init_sequential_domain(domain);
}
 
 
void Rectify_Mesh::apply_3D()
{
  Domaine& domain = domaine();
  Scatter::uninit_sequential_domain(domain);
 
  assert( domain.type_elem()->que_suis_je() == Motcle("Tetraedre") );
 
  check_cell_orientation_3D();
  check_cell_enumeration_3D();
 
  Scatter::init_sequential_domain(domain);
}
 
void Rectify_Mesh::check_cell_orientation_2D()
{
  const DoubleTab& nodes = domaine().les_sommets();
  IntTab&          cells = domaine().les_elems();
 
  const int nb_cells = cells.dimension(0);
 
  int nb_swaps = 0;
 
  for (int c=0; c<nb_cells; ++c)
    {
      const int n0 = cells(c,0);
      const int n1 = cells(c,1);
      const int n2 = cells(c,2);
 
      const double x0 = nodes(n0,0);
      const double x1 = nodes(n1,0);
      const double x2 = nodes(n2,0);
 
      const double y0 = nodes(n0,1);
      const double y1 = nodes(n1,1);
      const double y2 = nodes(n2,1);
 
      const double area = (x1-x0)*(y2-y0) - (x2-x0)*(y1-y0);
      if ( area < 0.)
        {
          swap_nodes(cells,c,1,2);
          ++nb_swaps;
        }
    }
 
  Cerr << "************************************************" << finl;
  Cerr << "Rectify_Mesh::check_cell_orientation_2D report :" << finl;
  Cerr << "  " << nb_swaps << " swap" << ((nb_swaps ==1) ? "" : "s") << " were performed" << finl;
  Cerr << "************************************************" << finl;
}
 
void Rectify_Mesh::check_cell_orientation_3D()
{
  const DoubleTab& nodes = domaine().les_sommets();
  IntTab&          cells = domaine().les_elems();
 
  const int nb_cells = cells.dimension(0);
 
  int nb_swaps = 0;
 
  for (int c=0; c<nb_cells; ++c)
    {
      const int n0 = cells(c,0);
      const int n1 = cells(c,1);
      const int n2 = cells(c,2);
      const int n3 = cells(c,3);
 
      const double x0 = nodes(n0,0);
      const double x1 = nodes(n1,0);
      const double x2 = nodes(n2,0);
      const double x3 = nodes(n3,0);
 
      const double y0 = nodes(n0,1);
      const double y1 = nodes(n1,1);
      const double y2 = nodes(n2,1);
      const double y3 = nodes(n3,1);
 
      const double z0 = nodes(n0,2);
      const double z1 = nodes(n1,2);
      const double z2 = nodes(n2,2);
      const double z3 = nodes(n3,2);
 
      const double volume =   (x1-x0) * (y2-y0) * (z3-z0)
                              + (x2-x0) * (y3-y0) * (z1-z0)
                              + (x3-x0) * (y1-y0) * (z2-z0)
                              - (z1-z0) * (y2-y0) * (x3-x0)
                              - (x2-x0) * (z3-z0) * (y1-y0)
                              - (y3-y0) * (x1-x0) * (z2-z0);
      if (volume < 0.)
        {
          swap_nodes(cells,c,2,3);
          ++nb_swaps;
        }
    }
 
  Cerr << "************************************************" << finl;
  Cerr << "Rectify_Mesh::check_cell_orientation_3D report :" << finl;
  Cerr << "  " << nb_swaps << " swap" << ((nb_swaps ==1) ? "" : "s") << " were performed" << finl;
  Cerr << "************************************************" << finl;
 
}
 
void Rectify_Mesh::check_cell_enumeration_3D()
{
  const DoubleTab& nodes = domaine().les_sommets();
  IntTab&          cells = domaine().les_elems();
 
  const int nb_cells = cells.dimension(0);
 
  ArrOfDouble lengths(3);
 
  int nb_swaps = 0;
 
  for (int c=0; c<nb_cells; ++c)
    {
      const int n0 = cells(c,0);
      const int n1 = cells(c,1);
      const int n2 = cells(c,2);
      const int n3 = cells(c,3);
 
      const double x0 = nodes(n0,0);
      const double x1 = nodes(n1,0);
      const double x2 = nodes(n2,0);
      const double x3 = nodes(n3,0);
 
      const double y0 = nodes(n0,1);
      const double y1 = nodes(n1,1);
      const double y2 = nodes(n2,1);
      const double y3 = nodes(n3,1);
 
      const double z0 = nodes(n0,2);
      const double z1 = nodes(n1,2);
      const double z2 = nodes(n2,2);
      const double z3 = nodes(n3,2);
 
      lengths[0] =   ((x0+x1)-(x2+x3))*((x0+x1)-(x2+x3))
                     + ((y0+y1)-(y2+y3))*((y0+y1)-(y2+y3))
                     + ((z0+z1)-(z2+z3))*((z0+z1)-(z2+z3));
 
      lengths[1] =   ((x0+x2)-(x1+x3))*((x0+x2)-(x1+x3))
                     + ((y0+y2)-(y1+y3))*((y0+y2)-(y1+y3))
                     + ((z0+z2)-(z1+z3))*((z0+z2)-(z1+z3));
 
      lengths[2] =   ((x0+x3)-(x1+x2))*((x0+x3)-(x1+x2))
                     + ((y0+y3)-(y1+y2))*((y0+y3)-(y1+y2))
                     + ((z0+z3)-(z1+z2))*((z0+z3)-(z1+z2));
 
      const int id = imin_array(lengths);
      //  const int id = imax_array(lengths);
 
      if ( (id == 0) && (lengths[0] < lengths[1]) )
        {
          swap_nodes(cells,c,1,2);
          swap_nodes(cells,c,1,3);
          ++nb_swaps;
        }
 
      if (id == 1)
        {
          // nothing to do
        }
 
      if ( (id == 2) && (lengths[2] < lengths[1]) )
        {
          swap_nodes(cells,c,2,3);
          swap_nodes(cells,c,1,3);
          ++nb_swaps;
        }
    }
 
  Cerr << "************************************************" << finl;
  Cerr << "Rectify_Mesh::check_cell_enumeration_3D report :" << finl;
  Cerr << "  " << nb_swaps << " swap" << ((nb_swaps ==1) ? "" : "s") << " were performed" << finl;
  Cerr << "************************************************" << finl;
 
}
 
void Rectify_Mesh::swap_nodes(IntTab& cells, int cell, int node0, int node1)
{
  const int tmp  = cells(cell,node0);
  cells(cell,node0) = cells(cell,node1);
  cells(cell,node1) = tmp;
}