public FusionneSommet(
     SommetDessin sommetDetruit, SommetDessin sommetGarde, int original_X, int original_Y) {
   this.sommetDetruit = sommetDetruit;
   this.sommetGarde = sommetGarde;
   aretesEntrantes = new Vector();
   aretesSortantes = new Vector();
   Enumeration e = sommetDetruit.getSommet().aretesEntrantes();
   while (e.hasMoreElements()) {
     this.aretesEntrantes.addElement(((Arete) e.nextElement()).getAreteDessin());
   }
   e = (sommetDetruit.getSommet()).aretesSortantes();
   while (e.hasMoreElements()) {
     this.aretesSortantes.addElement(((Arete) e.nextElement()).getAreteDessin());
   }
   this.original_X = original_X;
   this.original_Y = original_Y;
 }