CGAL users discussion list

[Andreas Fabri <>]

On 29/11/2011 11:13, Gillian Ng wrote:
> I've been looking into the Nef_Polyhedron_3 class, but I don't quite
> understand how to populate it with data. The data I have consists of indices
> and vertices. This would work alright with Polyhedron_3, but Nef seems
> different. I have considered writing it to an OBJ and then reading that OBJ
> into the Nef, as it seems to be the simplest way, but I'm not sure.

You can construct a Nef_polyhedron from a Polyhedron.

> The other thing I can't seem to find is, what does the following snippet
> mean? They're everywhere in the examples.
>
>      Nef_polyhedron_3 N;
>      std::cin>>  N; //<-- What's being cin'd?

A Nef_polyhedron_3 that has been written to a stream with cout << N;
It's an undocumented file format.

andreas

> Help? Thanks a lot guys.
>
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