CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

Ben McWhorter wrote:
> Hi Sebastian,
>
> The reason that I test if they are disjoint before joining is because I 
> need each disjoint nef polyhedron to be output separately.
>
> Also, the problem that I was having is that when I would join them 
> together without the check, I would get resulting nef polyhedron that 
> were either not simple or not valid.
>
> Doing the join the way I do, gives me outputs that are all simple and 
> valid.  I don't believe that you will have a problem with those 3 
> examples I sent in particular, but simply joining all of my input 
> together in the manner you did gives me a result that is either not 
> simple or not valid.
>
> Does that make more sense?
>
> If you want me to show you an example of the join producing this invalid 
> output, I can find some example input that displays the problem.
Having the input that displays the problem would be nice

Sebastien.

[snip]