CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

On 10/02/2013 01:55 PM, Matti Lehtonen wrote:
> Hi,
>
> are there any suggestions for the best way to construct curves (or
> ordered lists of vertices/points) of border line of Polyhedron_3?
>
> There are functions like   Halfedge_iterator P.border_halfedges_begin
> ()  or  Edge_iterator P.border_edges_begin(),   but documentation do not
> say anything about halfedge/edge order at border (or I missed that
> statement).
For each halfedge in the range of border halfedges, use next() while you 
are not back to the first one and use a set to collect already visited 
halfedge (to no do the walk again). You can also add an attribute in the 
halfedge.

Sebastien.

> Matti Lehtonen
> --
> Life is complex. It has real and imaginary parts.