CGAL users discussion list

[Andreas Fabri <>]

Either use a face iterator, to traverse all faces
Or go to neighbor faces: For a face you can get the
halfedges on its border, for each halfedge you
can get the twin halfedge, and from there the face.
Note that you might get the same neighbor face
several times.

best,

andreas


On 21/11/2016 09:09, sg wrote:
> Okk thanks. Its working now.
> One more thing I get a face handle from this code. I add some data to
> this face by set_data() method. Now i want to access next face from
> current handle. How can I do that ?
>
> On Mon, Nov 21, 2016 at 12:49 PM, andreas.fabri [via cgal-discuss]
> <[hidden email] </user/SendEmail.jtp?type=node&node=4662377&i=0>> wrote:
>
>     Well, it is not a static function.
>
>     If your arrangement object is called arr
>     you have to write
>
>     arr.non_const_handle(*f);
>
>     best,
>
>     andreas
>
>     On 20/11/2016 22:11, sg wrote:
>
>     > I am implementing some code in CGAL. I made an arrangement. Now I want 
> to add
>     > some data to every face in arrangement. So i access a face by below 
> method.
>     > It return const handle. So i try to convert this to non_const_handle. 
> But it
>     > show error that " cannot call member function without object."
>     >
>     >     const Face_const_handle* f;
>     >     if(f = boost::get<Face_const_handle>(&(it->second))){
>     >         Arrangement_2::Face_handle fh = 
> Arrangement_2::non_const_handle(*f);
>     > // ERROR HERE
>     >         for(int i=1;i<convexPts.size();i++){
>     >             CGAL::Gmpq temp =
>     > CGAL::squared_distance(convexPts[0],convexPts[i]);
>     >             if(temp>max){
>     >                 max = temp;
>     >                 fh->set_data(max);
>     >             }
>     >        }
>     >    }
>     >
>     >
>     >
>     >
>     >
>     > --
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>     >
>     --
>     Andreas Fabri, PhD
>     Chief Officer, GeometryFactory
>     Editor, The CGAL Project
>
>     phone: +33.492.954.912    skype: andreas.fabri
>
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--
Andreas Fabri, PhD
Chief Officer, GeometryFactory
Editor, The CGAL Project

phone: +33.492.954.912    skype: andreas.fabri