CGAL users discussion list

so.. the edge-uses, are they data-typed as shalfedges? if so, then these are
"shalfedges" which are not on the spheremap, no? 

Quoting Peter Hachenberger 
<>:

> Hi Amir,
> you got that a bit wrong. Every shalfedge is on a sphere map. SHalfedges
> occurr
> in two types of cycles in cycles around sfaces on a sphere map and in
> halffacet cycles.
> In the latter case we call the traversing of the shalfedges an edge-use.
> 
> Peter
> 
> -----"Amir Vaxman" 
> <>
>  wrote: -----
> 
> To: 
> <>
> From: "Amir Vaxman" 
> <>
> Date: 03/11/2009 02:17PM
> Subject: [cgal-discuss] Another question regardin Nef polyhedra - shalfedges
> 
> 
> 
> 
> 
> 
> 
> 
> 
> Hello,
> 
>  
> 
> If I understand correctly, when I traverse a halffacet
> cycle, I get a cyclic list of shalfedges. I gatherd that every other
> shalfedge
> is on the spheremap of a vertex (and the others are what is called
> â€&#65533;oriented
> edge-useâ€&#65533;). How do I know which is which?
> 
>  
> 
> Amir.
> 
> 
> 
>