CGAL users discussion list

[Rash <>]

Dear Readers,

I fail horribly at retrieving the primitive which causes the 
intersection. I calculate a hit:

                boost::optional<Primitive_id> hit = 
tree.first_intersected_primitive(rays[this->transformCoordinates(y,x)]);

Then check if a hit happened:

if(hit)

And then the chaos starts. There is simply no "getIntersectedPrimitive" 
member function of primitive id. What I am doing wrong? How can I do it 
right?

Currently I am getting an iterrator for faces (at least this is what I 
think what I am doing). Then I get the first face. This seems to be a 
pretty strange approach. How can I get the the normal of 
I_Polyhedron_facet and how do I get the intersection point?


CGAL::internal::In_place_list_iterator<CGAL::HalfedgeDS_in_place_list_face<CGAL::I_Polyhedron_facet<CGAL::HalfedgeDS_face_base<CGAL::HalfedgeDS_list_types<CGAL::Simple_cartesian<double>, 
CGAL::I_Polyhedron_derived_items_3<CGAL::Polyhedron_items_3>, 
std::allocator<int> >, CGAL::Boolean_tag<true>, 
CGAL::Plane_3<CGAL::Simple_cartesian<double> > > > >, 
std::allocator<CGAL::HalfedgeDS_in_place_list_face<CGAL::I_Polyhedron_facet<CGAL::HalfedgeDS_face_base<CGAL::HalfedgeDS_list_types<CGAL::Simple_cartesian<double>, 
CGAL::I_Polyhedron_derived_items_3<CGAL::Polyhedron_items_3>, 
std::allocator<int> >, CGAL::Boolean_tag<true>, 
CGAL::Plane_3<CGAL::Simple_cartesian<double> > > > > > > it = *hit;


CGAL::I_Polyhedron_facet<CGAL::HalfedgeDS_face_base<CGAL::HalfedgeDS_list_types<CGAL::Simple_cartesian<double>, 
CGAL::I_Polyhedron_derived_items_3<CGAL::Polyhedron_items_3>, 
std::allocator<int> >, CGAL::Boolean_tag<true>, 
CGAL::Plane_3<CGAL::Simple_cartesian<double> > > 
>::Halfedge_around_facet_circulator ipfacet = it->facet_begin();

Kind regards
Rashid