CGAL users discussion list

[Monique Teillaud <>]

Hi

yes, 3D periodic alpha-shapes will be available in CGAL 3.6

        Monique Teillaud

Benjamin schwarz wrote:
> Just by curiosity, I wonder if an extension is considered for
> Periodic_3_alpha_shape_3 . Such a feature would, for instance, allow
> the extension of alpha_shape based pocket detection algorithms to
> problems subject to border constraints.
>
>    --Ben
>
> On Fri, Jan 8, 2010 at 8:28 PM, Bruno Chareyre
> <>
>  wrote:
> > Thank you Manuel.
> > I use regular triangulations for geometry analysis of (non-periodic) sphere
> > packings in DEM simulations (http://yade-dem.org).
> > We recently implemented periodic boundary conditions, and I'd like to
> > perform the same sort of analysis. It would have been awesome to do that
> > just by changing regular traits to regular_periodic!
> > I think the trick of duplicating shifted spheres will do the job.
> >
> > Bruno
> >
> >
> >
> >
> > Manuel Caroli a écrit :
> > > Dear Bruno,
> > >
> > > You are correct, unfortunately there is not even a
> > > Periodic_3_regular_triangulation_3 class. It would not be very hard to do
> > > but currently it is not planned. That is mainly because so far there was
> > > little interest in this from the user side. It would be very interesting
> > > though to know for what application you are planning to use the periodic
> > > triangulations.
> > >
> > > Best
> > >
> > > Manuel
> > >
> > > Bruno Chareyre wrote:
> > > > Hello,
> > > >
> > > > I saw the new CGAL package for periodic triangulations. If I'm correct
> > > > there are no Periodic_3_Regular_traits.
> > > > I was wondering if it would be hard (or if it was planned) to triangulate
> > > > periodic weighted points?
> > > >
> > > > Thanks.
> > > >
> > > > _______________
> > > > Bruno Chareyre
> > > > Associate Professor
> > > > Grenoble INP
> > > > Lab. 3SR
> > > > BP 53 - 38041, Grenoble cedex 9 - France
> > > > Tél : 33 4 56 52 86 21
> > > > Fax : 33 4 76 82 70 43
> > > > ________________
> >
> > --
> > _______________
> > Bruno Chareyre
> > Associate Professor
> > Grenoble INP
> > Lab. 3SR
> > BP 53 - 38041, Grenoble cedex 9 - France
> > Tél : 33 4 56 52 86 21
> > Fax : 33 4 76 82 70 43
> > ________________
> >
> >
> > --
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--
Monique Teillaud
INRIA Sophia Antipolis - Méditerranée
http://www.inria.fr/sophia/members/Monique.Teillaud/