CGAL users discussion list

["Wonwoo Lee" <>]

Hi. I have questions about Nef_3 polyhedron.

Question 1 :
If I made a Nef_3 polyhedron with a plane (0,0,1,-20), a simple z=20,
what region does the polyhedron represent ?
Is it the upper region or the lower region of the plane ?

Following to the example about converting Polyhedron_3 to Nef_polyhedron_3,
I created a simple tetrahedron and converted it to Nef_polyhedron_3.

In this case, the region Nef_polyhedron_3 represents is inside of the
tethedron ?

Question 2 :
Let's assume that I create a triangular mesh model (for examle, a cube)
with Polyhedron_3 by using incremental builder and convert it to a
Nef_polyhedron_3.
If all the facets outward normal vector, what region the converted
Nef_polyhedron_3
represents, inside the mesh or outside ?