CGAL users discussion list

[Atul Thakur <>]

Hi,

Is it possible to build the Nef-polyhedra from some non-manifold dataset like a triangle-soup?

If yes, is there an example of Nef-polyhedron builder class like polyhedron builder.

Sorry for bringing up the question again. I was not sure if the question got noticed earlier.

thanks in anticipation,

-Atul

On Mon, Jun 15, 2009 at 9:07 PM, Joe C <> wrote:

I remember that the manual says the extended kernel could be used to handle non-manifold geometries. But I have no experience using that and there is no example code showing how to do that. I am also curious to know if there is a way to populate the Nef Polyhedron directly, for example, from triangle soup.

Thanks.
Joe

On Mon, Jun 15, 2009 at 4:58 PM, Atul Thakur <> wrote:

Hi all,
As far as my understanding goes about Nef Polyhedra, it is a kind of cellular model by which we can represent and operate upon the non-manifold geometries (please correct me if wrong).
Most of the CGAL examples that I have seen so far usually convert a simple Polyhedron into a Nef Polyhedron, which means that we always load manifold geometric data into a Nef Polyhedra.
If I need to operate upon a nonmanifold geometry like a sphere enclosed in a box, I am not sure how to load such data into Nef Polyhedra.

Is there a way to populate the Nef Polyhedron directly, using some kind of facet data? Can someone please point me to example code to do that?

thanks and regards,

-Atul