CGAL users discussion list

[Andreas Fabri <>]

Hello,

As it is "halfedges_begin" (plural form of halfedge)
it is also "vertices_begin" and not "vertex_begin".

andreas


Shi Yan wrote:
> i know this, but you know,
>
> there is no such thing like  hds.vertex_begin()
>
> i only find hds. faces_begin()  hds.halfedges_begin()
>
> so i was wondering, how to travel the whole vertex list with this hds????
>
> On Fri, Aug 22, 2008 at 2:25 AM, Peter Hachenberger
> <>
>  wrote:
> > Hi Shi,
> >
> > Polyhedron_3 offers an interface that allows enhancing its functionality.
> > Instead of
> > adding a function to the HDS, you write a class C that inherits from
> > Modifier_class<HDS>
> > an has a function delegate(HDS& hds), which implements the function you
> > need. Then
> > you can use this function on a polyhedron P by calling
> >
> > Polyhedron_3 P;
> > C c;
> > P.delegate(c).
> >
> > You can find more on this mechanism in
> >
> > http://www.cgal.org/Manual/3.3/doc_html/cgal_manual/Polyhedron/Chapter_main.html#Subsection_12.6.2
> >
> > Peter
> >
> > -----"Shi Yan" 
> > <>
> >  wrote: -----
> >
> > To: 
> >
> > From: "Shi Yan" 
> > <>
> > Date: 08/22/2008 03:14AM
> > Subject: [cgal-discuss] Re: how to remove a vertex from a polyhedron.
> >
> > so this is how i do vertex removal:
> >
> > i hacked the polyhedron_3.h and added this function
> >
> >      void eraseIsolatedVertex(Vertex_handle v)
> >      {
> >           HalfedgeDS_decorator<HDS> D(hds);
> >        CGAL_precondition(v->halfedge()==0);
> >
> >
> >
> >        D.vertices_erase(v);
> >      }
> >
> > i don't think this is the right way to do this. but this is the only
> > way i can think of.
> >
> > On Thu, Aug 21, 2008 at 4:43 PM, Shi Yan 
> > <>
> >  wrote:
> > > hello guys,
> > >
> > > i have some isolated vertices in my polyhedron model that link to no
> > > half-edges. now i want to remove them. but it seems that cgal has no
> > > vertex erase function. so how should i do that ? thank you very much.
> > --
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