CGAL users discussion list

["Wesley Smith" <>]

Hi,
I'm starting to work with 3D Delaunay triangulations and am running
very basic tests to see how to use it.  In my initial test, I have the
following set of points:

(0, 0, 0)
(1, 0, 0)
(0, 1, 0)
(0, 0, 1)

I was expecting to get 1 finite cell from this, but I'm actually
getting 4 when calling dt.finite_cells_begin().  They look like this:

p0: 1.000000 0.000000 0.000000
p1: 0.000000 1.000000 0.000000
p2: 0.000000 0.000000 0.000000
p3: 0.000000 0.000000 0.000000
dual: 0.500000 0.500000 -0.000000

p0: 0.000000 0.000000 1.000000
p1: 1.000000 0.000000 0.000000
p2: 0.000000 0.000000 0.000000
p3: 0.000000 0.000000 0.000000
dual: inf -inf -inf

p0: 0.000000 1.000000 0.000000
p1: 0.000000 0.000000 1.000000
p2: 0.000000 0.000000 0.000000
p3: 0.000000 0.000000 0.000000
dual: -0.992669 0.500000 0.500000

p0: 0.000000 1.000000 0.000000
p1: 1.000000 0.000000 0.000000
p2: 0.000000 0.000000 1.000000
p3: 0.000000 0.000000 0.000000
dual: 0.500000 0.500000 0.500000


Is this expected?  If so, how can I prune this list to just give me
the non-degenerate 3D tetrahedron, which appears last in this list?

thanks,
wes