Reorienter_triangles.cpp

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#include <Reorienter_triangles.h>
#include <Scatter.h>
 
Implemente_instanciable_32_64(Reorienter_triangles_32_64,"Reorienter_triangles",Interprete_geometrique_base_32_64<_T_>);
// XD reorienter_triangles interprete reorienter_triangles INHERITS_BRACE not_set
// XD attr domain_name ref_domaine domain_name REQ Name of domain.
 
template <typename _SIZE_>
Sortie& Reorienter_triangles_32_64<_SIZE_>::printOn(Sortie& os) const
{
  return Interprete::printOn(os);
}
 
template <typename _SIZE_>
Entree& Reorienter_triangles_32_64<_SIZE_>::readOn(Entree& is)
{
  return Interprete::readOn(is);
}
 
template <typename _SIZE_>
Entree& Reorienter_triangles_32_64<_SIZE_>::interpreter_(Entree& is)
{
  Cerr << "Reorientation of triangles for either direct..." << finl;
  if (Objet_U::dimension != 2)
    {
      Cerr << "we can not reorientate (Reorienter) triangles in dimension " << Objet_U::dimension <<finl;
      Process::exit();
    }
  this->associer_domaine(is);
  Domaine_t& dom=this->domaine();
  Scatter::uninit_sequential_domain(dom);
  this->reorienter(dom);
  Scatter::init_sequential_domain(dom);
  Cerr << "Reorientation of triangles... OK" << finl;
  return is;
}
 
template <typename _SIZE_>
Sens_Orient Reorienter_triangles_32_64<_SIZE_>::test_orientation_triangle(IntTab_t& les_elems, int_t ielem, const DoubleTab_t& coord_sommets) const
{
  static const int SOM_Z = 0;
  static const int SOM_A = 1;
  static const int SOM_B = 2;
 
  const int_t som_Z = les_elems(ielem,SOM_Z);
  const int_t som_A = les_elems(ielem,SOM_A);
  const int_t som_B = les_elems(ielem,SOM_B);
 
  double ZA0 = coord_sommets(som_A,0) - coord_sommets(som_Z,0);
  double ZB0 = coord_sommets(som_B,0) - coord_sommets(som_Z,0);
  double ZA1 = coord_sommets(som_A,1) - coord_sommets(som_Z,1);
  double ZB1 = coord_sommets(som_B,1) - coord_sommets(som_Z,1);
 
  //compute cross product ZAxZB
  double pdtvect = ZA0*ZB1 - ZA1*ZB0;
 
  if (pdtvect<0.)
    {
      //the cross product is negative: this is a badly oriented triangle
#ifdef _AFFDEBUG
      {
        Process::Journal<<"  element "<<num_element<<"  indirect"<<finl;
      }
#endif
      return Sens_Orient::INDIRECT;
    }
#ifdef _AFFDEBUG
  {
    Process::Journal<<"  element "<<num_element<<"  direct"<<finl;
  }
#endif
 
  return Sens_Orient::DIRECT;
}
 
template <typename _SIZE_>
Sens_Orient Reorienter_triangles_32_64<_SIZE_>::reorienter_triangle(IntTab_t& les_elems, int_t num_element) const
{
  static const int SOM_A = 1;
  static const int SOM_B = 2;
 
  //to reorient the triangle, swap vertices 1 and 2
  int_t tmp;
  tmp = les_elems(num_element,SOM_A);
  les_elems(num_element,SOM_A) = les_elems(num_element,SOM_B);
  les_elems(num_element,SOM_B) = tmp;
  return Sens_Orient::DIRECT;
}
 
/*!
 * @brief This method reorients triangles to the direct (positive) orientation.
 * @param dom the domain whose triangles are to be reoriented
 */
template <typename _SIZE_>
void Reorienter_triangles_32_64<_SIZE_>::reorienter(Domaine_t& dom) const
{
  const DoubleTab_t& coord_sommets = dom.coord_sommets();
 
  if (dom.type_elem()->que_suis_je() == "Triangle" )
    {
      //domain of triangles
      IntTab_t& les_elems = dom.les_elems();
      int_t nb_elems = les_elems.dimension(0);
 
      //sweep over triangles
      for (int_t ielem=0 ; ielem<nb_elems ; ielem++)
        {
          if (test_orientation_triangle(les_elems, ielem, coord_sommets)==Sens_Orient::INDIRECT)
            {
              //triangle oriented in indirect sense -> needs reorienting
              reorienter_triangle(les_elems, ielem);
 
#ifdef _AFFDEBUG
              {
                Process::Journal<<"  #element reoriente "<<ielem<<finl;
                static const int SOM_Z = 0;
                static const int SOM_A = 1;
                static const int SOM_B = 2;
                const int som_Z = les_elems(ielem,SOM_Z);
                const int som_A = les_elems(ielem,SOM_A);
                const int som_B = les_elems(ielem,SOM_B);
                Process::Journal<<"    somZ= "<<som_Z<<"  coords= "<<coord_sommets(som_Z, 0)<<" "<<coord_sommets(som_Z, 1)<<finl;
                Process::Journal<<"    somA= "<<som_A<<"  coords= "<<coord_sommets(som_A, 0)<<" "<<coord_sommets(som_A, 1)<<finl;
                Process::Journal<<"    somB= "<<som_B<<"  coords= "<<coord_sommets(som_B, 0)<<" "<<coord_sommets(som_B, 1)<<finl;
              }
#endif
            }
        }
    }
}
 
 
template class Reorienter_triangles_32_64<int>;
#if INT_is_64_ == 2
template class Reorienter_triangles_32_64<trustIdType>;
#endif