Trianguler_H.cpp

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#include <Trianguler_H.h>
#include <Domaine.h>
 
Implemente_instanciable(Trianguler_H,"Trianguler_H",Triangulation_base);
// XD trianguler_h triangulate trianguler_h INHERITS_BRACE To achieve a triangular mesh from a mesh comprising
// XD_CONT rectangles (4 triangles per rectangle). Should be used in VEF discretization. Principle: NL2
// XD_CONT \includeimage{{triangulerh.jpeg}}
 
 
 
/*! @brief Simple appel a: Interprete::printOn(Sortie&)
 *
 * @param (Sortie& os) un flot de sortie
 * @return (Sortie&) le flot de sortie modifie
 */
Sortie& Trianguler_H::printOn(Sortie& os) const
{
  return Interprete::printOn(os);
}
 
 
/*! @brief Simple appel a: Interprete::readOn(Entree&)
 *
 * @param (Entree& is) un flot d'entree
 * @return (Entree&) le flot d'entree modifie
 */
Entree& Trianguler_H::readOn(Entree& is)
{
  return Interprete::readOn(is);
}
 
/*! @brief Triangule tous les element d'un domaine: transforme les elements goemetriques du domaine en triangles.
 *
 *     Pour l'instant on ne sait trianguler que des Rectangles
 *     (on les coupe en 2).
 *
 * @param (Domaine& domaine) le domaine dont on veut trianguler les elements
 */
void Trianguler_H::trianguler(Domaine& domaine) const
{
  Domaine& dom=domaine;
  IntTab& les_elems=domaine.les_elems();
  int oldsz=les_elems.dimension(0);
  DoubleTab& sommets=dom.les_sommets();
  int cpt=sommets.dimension(0);
  {
    DoubleTab sommets_ajoutes(oldsz, dimension);
    domaine.type_elem()->calculer_centres_gravite(sommets_ajoutes);
    sommets.resize(cpt+oldsz, dimension);
    for(int i=0; i<oldsz; i++)
      for(int j=0; j<dimension; j++)
        sommets(cpt+i,j)=sommets_ajoutes(i,j);
  }
  if ((domaine.type_elem()->que_suis_je() == "Rectangle")|| (domaine.type_elem()->que_suis_je() == "Quadrangle"))
    {
      domaine.typer("Triangle");
      IntTab new_elems(4*oldsz, 3);
      for(int i=0; i< oldsz; i++)
        {
          int i0=les_elems(i,0);
          int i1=les_elems(i,1);
          int i2=les_elems(i,2);
          int i3=les_elems(i,3);
 
          new_elems(i,0)=                  i+cpt;
          new_elems(i,1)=                  i0;
          new_elems(i,2)=                  i1;
 
          new_elems(i+oldsz,0)=                  i+cpt;
          new_elems(i+oldsz,1)=                  i0;
          new_elems(i+oldsz,2)=                  i2;
          mettre_a_jour_sous_domaine(domaine,i,i+oldsz,1);
 
          new_elems(i+2*oldsz,0)=          i+cpt;
          new_elems(i+2*oldsz,1)=          i1;
          new_elems(i+2*oldsz,2)=          i3;
          mettre_a_jour_sous_domaine(domaine,i,i+2*oldsz,1);
 
          new_elems(i+3*oldsz,0)=          i+cpt;
          new_elems(i+3*oldsz,1)=          i2;
          new_elems(i+3*oldsz,2)=          i3;
          mettre_a_jour_sous_domaine(domaine,i,i+3*oldsz,1);
        }
      les_elems.ref(new_elems);
    }
  else
    {
      Cerr << "We do not yet know how to Trianguler_h the "
           << domaine.type_elem()->que_suis_je() <<"s"<<finl;
    }
}