CGAL users discussion list

[Andreas Fabri <>]

There is probably space to improve the manual, but the notion of "Handle" IS 
documented, and
not only at obscure and hard to find places, but right in the beginning of 
the user manual of the
triangulation chapter.


25.4.1   Description

The class Triangulation_2<Traits,Tds> serves as a base class for the other 2D 
triangulations classes and implements the user interface to a triangulation.

The vertices and faces of the triangulations are accessed through handles, iterators and circulators. A handle is a model of the concept Handle which basically offers the 
two dereference operators * and -> . A circulator is a type devoted to visit circular sequences. Handles are used whenever the accessed element is not part of a sequence. 
Iterators and circulators are used to visit all or parts of the triangulation.

Source: 
http://www.cgal.org/Manual/3.3/doc_html/cgal_manual/Triangulation_2/Chapter_main.html


So I insist, please read the manual, and note that there is no need to read 
all pages.
The manual is broken down in parts, which are broken down in chapters, which 
consist
of a User Manual, many of them with examples, and a Reference Manual.

best regards,

andreas

Juan Pablo Carbajal wrote:
> Thanks a lot!
> Extremely useful!
>
> JPi
>
>
> On Tue, Oct 7, 2008 at 8:52 PM, Andreas Fabri
> <>
>  wrote:
> > Dennis Endt wrote:
> > > Andreas Fabri schrieb:
> > > > Dennis Endt wrote:
> > > > > Hi,
> > > > >
> > > > > thats my Problem:
> > > > > /typedef CGAL::Simple_cartesian<double> SK;
> > > > > typedef CGAL::Filtered_kernel<SK> FK;
> > > > > struct K : public FK {};
> > > > >
> > > > > typedef K::Point_3 dPoint;
> > > > > typedef CGAL::Delaunay_triangulation_3<K> Triangulation;
> > > > > typedef Triangulation::Vertex_handle Vertex_handle;
> > > > >
> > > > > Triangulation T;
> > > > >
> > > > > list<Vertex_handle> vertices; // vector to hold the points of the convex
> > > > > hull
> > > > > T.incident_vertices(T.infinite_vertex(), back_inserter(vertices)); //
> > > > > get the points from Delaunay/
> > > > >
> > > > > Can anyone plz tell how I get access to the points corresponding to the
> > > > > vertex_handles? It is very urgent.
> > > > >
> > > > > I tried everything so far...it cannot be so difficult ;)
> > > > >
> > > > > Best Dennis
> > > > for(list<Vertex_handle>::iterator it =  vertices.begin();
> > > >    it != vertices.end();
> > > >    ++it){
> > > >  std::cout (*it)->point() << std::endl;
> > > > }
> > > Thanks a lot! :)
> > >
> > > I only forgot to set the brackets. It can be so easy :)
> > >
> > > Best
> > > Dennis
> >
> > And here comes the "official" link
> > http://www.cgal.org/Manual/3.3/doc_html/cgal_manual/Handle_ref/Concept_Handle.html
> >
> > andreas
> > --
> > You are currently subscribed to cgal-discuss.
> > To unsubscribe or access the archives, go to
> > https://lists-sop.inria.fr/wws/info/cgal-discuss