CGAL users discussion list

[Mariette Yvinec <>]

Bernhard Reimar Hoefle wrote:

> Hi!
> Once again:
> How do I get easiest a Polygon_2 representing the outer boundary of an alpha
> shape?
>
> Bernhard
>  
You can get easily the set of edges on the boundary of the alpha complex
but these edges won't be ordered and belong to inner as well as outer 
boundaries.
The outer boundary of an alpha complex is not necessarily connected, 
anyway ....