CGAL users discussion list

[Peter Hachenberger <>]

> I'm curious on these questions:
> 
> - is there a nef_1 representation of a nef in 1 dimension?
>   (yes, it's just a combinition of any open or close ranges. What I mean is 
>   a universal representation as nef_3)

We don't have that in CGAL and it does not seem interesting to have.

> - is there a function to elevate the number of dimensions to higher 
> dimension,
>   e.g., convert a nef_2 into a nef_3?

Not yet.

> - is there a convenient way to perform some well-know geometric operation, 
> such as
>   glide, extrude, etc., with an existing nef_X?

Sorry to say, but I don't know glide and extrude.

> - is there a function to glide a nef_3 to get the swept nef_3?

if glide means to compute the area swept by a nef_3 moved along a
polygonal line, then you can do that with the Minkowski_sum_3 package
that hopefully will be in the next CGAL release.

> - is there a machanism to shift the kernel types of one nef_3 (and any 
> other 
>   CGAL data structure) at runtime?

No.

> - is there a function to incrementally build a (not necessarily 2-manifold) 
> nef_3?

No, I neither have an idea how it might work, nor the manpower to do
realize that at the moment.

Peter