CGAL users discussion list

[Manuel Caroli <>]

Hi Andi,

edges are represented as a triple of a cell and two indices determining 
two vertices in this cell. Thus they don't contain any functionality on 
their own.

The easiest solution that comes to my mind is to get the two points from 
the edge:
Point p = (*it).first->vertex((*it).second)->point();
Point q = (*it).first->vertex((*it).third)->point();

and then output them in whatever format you want.

Hope this helps

Manuel



 wrote:
> Hello,
> I have a set of points and use alphashapes to get the boundary of these 
> points.
>
> as.get_alpha_shape_edges(std::back_inserter(edges),
>                            Alpha_shape_3::SINGULAR);
>
> But how can I write the edges into a file that I can have look on them in 
> grass
> gis for example?
>
>
> for(it = edges.begin(), it != edges.end(); ++it)
> {
> cout << *it << endl;
> }
>
> does not work.
>
> Does anybody know how to do it??
>
> Thanks
>
> Andi