CGAL users discussion list

["Shi Yan" <>]

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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-- 
Dept. of Computer Science
University of California, Davis
Homepage:http://wwwcsif.cs.ucdavis.edu/~yans/