Subject: CGAL users discussion list
List archive
- From: Andreas Fabri <>
- To:
- Subject: Re: [cgal-discuss] Difference between Lazy_exact and Filtered_kernel?
- Date: Thu, 03 Jul 2008 18:44:09 +0200
Thomas Zangl - Home wrote:
Am Thu, 03 Jul 2008 15:21:43 +0200, schrieb "Andreas Fabri" <>:
Hi!
Another question which arise during testing:
in ftp://ftp-sop.inria.fr/geometrica/pion/publis/lazy-kernel.pdf you
make a comparison between different kernels. Now, I ask myself:
if I use:
typedef CGAL::Simple_cartesian<CGAL::Gmpq> K;
typedef CGAL::Gmpq dbl;
all predicates and operations are done exactly? Like if the
filter of the Filtered_Kernel always returns "NO_IDEA"?
The reason is, if I use the plain Exact_pred_exact_constr. kernel, my
test app does not produce any degenerate cases. If I use the kernel
typedef'd above, I get a lot of them. It seems, computation accuracy is
far worse with the Simple_cartesian<CGAL::Gmpq> in my case.
Can you give a minimalistic code example.
andreas
Any idea why this can happen? How can I clarify that all computations
are done using exact arithmetic like described in your paper?
TIA,
- [cgal-discuss] Difference between Lazy_exact and Filtered_kernel?, Thomas Zangl - Home, 07/02/2008
- Re: [cgal-discuss] Difference between Lazy_exact and Filtered_kernel?, Andreas Fabri, 07/03/2008
- Re:[cgal-discuss] Difference between Lazy_exact and Filtered_kernel?, Thomas Zangl - Home, 07/03/2008
- Re: [cgal-discuss] Difference between Lazy_exact and Filtered_kernel?, Andreas Fabri, 07/03/2008
- Re:[cgal-discuss] Difference between Lazy_exact and Filtered_kernel?, Thomas Zangl - Home, 07/03/2008
- Re: [cgal-discuss] Difference between Lazy_exact and Filtered_kernel?, Andreas Fabri, 07/03/2008
- Re:[cgal-discuss] Difference between Lazy_exact and Filtered_kernel?, Thomas Zangl - Home, 07/03/2008
- Re:[cgal-discuss] Difference between Lazy_exact and Filtered_kernel?, Thomas Zangl - Home, 07/03/2008
- Re: [cgal-discuss] Difference between Lazy_exact and Filtered_kernel?, Andreas Fabri, 07/03/2008
- Re: [cgal-discuss] Difference between Lazy_exact and Filtered_kernel?, Andreas Fabri, 07/03/2008
- Re:[cgal-discuss] Difference between Lazy_exact and Filtered_kernel?, Thomas Zangl - Home, 07/03/2008
- Re: [cgal-discuss] Difference between Lazy_exact and Filtered_kernel?, Andreas Fabri, 07/03/2008
- Re:[cgal-discuss] Difference between Lazy_exact and Filtered_kernel?, Thomas Zangl - Home, 07/03/2008
- Re: [cgal-discuss] Difference between Lazy_exact and Filtered_kernel?, Andreas Fabri, 07/03/2008
Archive powered by MHonArc 2.6.16.