Polygone_poly.cpp

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#include <Polygone_poly.h>
#include <Domaine.h>
#include <Poly_geom_base.h>
 
Implemente_instanciable( Polygone_poly, "Polygone_poly", Elem_poly_base ) ;
 
Sortie& Polygone_poly::printOn( Sortie& os ) const
{
  return os << que_suis_je() << finl;
}
 
Entree& Polygone_poly::readOn( Entree& is )
{
  Elem_poly_base::readOn( is );
  return is;
}
/*! @brief remplit le tableau face_normales dans le Domaine_poly
 *
 */
void Polygone_poly::normale(int num_Face,DoubleTab& Face_normales,
                            const  IntTab& Face_sommets,
                            const IntTab& Face_voisins,
                            const IntTab& elem_faces,
                            const Domaine& domaine_geom) const
{
  const DoubleTab& les_coords = domaine_geom.coord_sommets();
 
  double x1,y1;
  double nx,ny;
  int n0 = Face_sommets(num_Face,0);
  int n1 = Face_sommets(num_Face,1);
  x1 = les_coords(n0,0)-les_coords(n1,0);
  y1 = les_coords(n0,1)-les_coords(n1,1);
  nx = -y1;
  ny = x1;
 
 
 
  /* DoubleTab xp;
 
  domaine_geom.Domaine::calculer_centres_gravite(xp);
  */
  /*
      int no3;
  int f0;
 
  // Orientation de la normale de elem1 vers elem2
  // pour cela recherche du sommet de elem1 qui n'est pas sur la Face
  int elem1 = Face_voisins(num_Face,0);
  if ( (f0 = elem_faces(elem1,0)) == num_Face )
    f0 = elem_faces(elem1,1);
  if ( (no3 = Face_sommets(f0,0)) != n0 && no3 != n1 )
    ;
  else
    no3 = Face_sommets(f0,1);
 
  x1 = les_coords(no3,0) - les_coords(n0,0);
  y1 = les_coords(no3,1) - les_coords(n0,1);
 
  double dot=(nx*x1+ny*y1);
  */
  int elem1=Face_voisins(num_Face,0);
 
  DoubleVect xp;
  ref_cast(Poly_geom_base,domaine_geom.type_elem().valeur()).calculer_un_centre_gravite(elem1,xp);
  x1=xp(0)-les_coords(n0,0);
  y1=xp(1)-les_coords(n0,1);
 
  double dot=(nx*x1+ny*y1);
 
  double scale = 1.0;
  if (Objet_U::bidim_axi)
    {
      const double r0 = les_coords(n0,0);
      const double r1 = les_coords(n1,0);
      const double r_bar = 0.5*(r0 + r1);
      scale = 2.0 * M_PI * r_bar; // multiply edge-length normal by Δθ * r̄
    }
 
  if ( (dot) > 0 )
    {
      Face_normales(num_Face,0) = - nx * scale;
      Face_normales(num_Face,1) = - ny * scale;
    }
  else
    {
      assert(dot !=0);
      Face_normales(num_Face,0) = nx * scale;
      Face_normales(num_Face,1) = ny * scale;
    }
}