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["Amir Vaxman" <>]

Ok, I got it: I need to use the Arrangement::halfedge in order to have this 
(and other) information at hand, and not the underlying dcel::halfedge. I 
still don't know why use target and not source, but I guess it doesn't 
matter...

Thanks,
Amir.

-----Original Message-----
From: Efraim Fogel 
[mailto:]
 
Sent: Wednesday, April 30, 2008 1:43 PM
To: 

Subject: Re: [cgal-discuss] "Target Vertex" in ArrangementDcelHalfedge

Amir Vaxman wrote:
> I still don't get something: it is written in the arrangement manual under 
> "Traversal Methods for an Arrangement Halfedge" (paragraph 2):
>
> "The source() and target() methods return handles to the halfedge source 
> and target vertices respectively"
>
> And the example there show usage of these methods. However, as mentioned, 
> they do not exist. What am I missing here?
>   
There is sufficient information in the underlying DCEL data-structure to
extract the source and target vertices, and all other incident
relations. What exactly are you missing?
> Amir.
>
>
>
> -----Original Message-----
> From: 
> 
>  
> [mailto:]
>  
> Sent: Tuesday, April 29, 2008 12:07 PM
> To: 
> 
> Subject: Re: [cgal-discuss] "Target Vertex" in ArrangementDcelHalfedge
>
> Quoting 
> :
>
>   
>> The documentation of Arrangement Halfedges, here:
>>
>> http://www.cgal.org/Manual/3.3/doc_html/cgal_manual/Arrangement_2_ref/Concept_ArrangementDcelHalfedge.html
>>
>> States the the function e->vertex() produces the target vertex.   
>> Don't DCEL structure usually produce the incident (source) vertex?
>>     
>
> No. You can get one from the other, as you probably know.
>
>   
>> is it an error of documentation?
>>     
>
> No
>
>   
>> Amir
>> --
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