CGAL users discussion list

[Peter Hachenberger <>]

On Tue, 2008-02-05 at 23:24 +0800, Max wrote:
> After applying your code update, I've run 3 test cases with the 
> following test code:
> 
>       Nef_polyhedron N_1(Plane_3( 1, 0, 0,-1), Nef_polyhedron::INCLUDED);
>       Nef_polyhedron N_2(Plane_3( 1, 0, 0,-1), Nef_polyhedron::EXCLUDED);
>       Nef_polyhedron N_pl = N_1 - N_2;                // a plane slice
>       Nef_polyhedron N_empty(Nef_polyhedron::EMPTY);
> 
>       CGAL_assertion(N_1.interior() == N_2);
>       CGAL_assertion(N_2.interior() == N_2);
>       CGAL_assertion(N_pl.interior() == N_empty);
>       CGAL_assertion(N_1.closure() == N_1);
>       CGAL_assertion(N_2.closure() == N_1);
>       CGAL_assertion(N_pl.closure() == N_pl);
>       CGAL_assertion(N_1.boundary() == N_pl);
>       CGAL_assertion(N_2.boundary() == N_pl);
>       CGAL_assertion(N_pl.boundary() == N_pl);
> 
> 1) 
> typedef Extended_homogeneous<CGAL::Gmpz> Kernel;
> typedef CGAL::Nef_polyhedron_3<Kernel>  Nef_polyhedron; 
> 
> Result: all passed.
> 
> 2)
> typedef Extended_homogeneous<CGAL::Gmpzf> Kernel;
> typedef CGAL::Nef_polyhedron_3<Kernel>  Nef_polyhedron; 
> 
> Result: all passed.
> 
> 3)
> typedef Extended_homogeneous<CGAL::Gmpzf> Kernel;
> typedef CGAL::Nef_polyhedron_3<Kernel, CGAL::SNC_indexed_items>  
> Nef_polyhedron; 
> 
> Result: compile failed. The cause is "CGAL_error_msg(in SNC_simplify.h) not 
> defined"
> 
> From another mail I just recieved, I was told: 
> 
> "Both extended kernels do not work together with SNC_indexed_items, and
> therefore also not with Gmpzf."
> 
> So. according to your opinion, this case may not be necessary. However, the
> "CGAL_error_msg not defined" problem seems to be dealt with.

The CGAL_error_msg is a new mechanism and not defined in CGAL 3.3.1. I
already expected problems here, but you can, as you already did, just
remove these lines, or replace them by CGAL_assertion_msg(false,
"--message in here--");

Peter