CGAL users discussion list

[Mael Rouxel-Labbé <>]

Hello,

Can you try to just add:

  #include <CGAL/Triangulation_face_base_with_info_2.h>

with the other includes at the top of file?

Best,
Mael

On 25/01/2021 14:09, Gianmarco Spera ( via cgal-discuss Mailing List) wrote:

Hello,

thanks a lot! I did it and it solves the three-dimensional example, thanks.

However, If I try the same with the two-dimensional example, it gives me a new error message ( The previous one is solved! )

It says that there is an error with Triangulation_face_base_with_info_2, I attached the file with the error message. It suggests switching to Triangulation_face_base_2 but I get always an error.

Thanks for your help.

Best,

Gianmarco

Il giorno lun 25 gen 2021 alle ore 08:58 Mael Rouxel-Labbé <> ha scritto:

Hello,

That would be my fault, I changed the default branch of my repository back to the 'master' branch and not the periodic branch once the reviewing process was over. You have to add the following line:

  git checkout -b Generic_Periodic_Triangulations origin/Generic_Periodic_Triangulations

in between the two following commands:

  git clone  /path/to/cgal
  cd /path/to/cgal/Periodic_3_triangulation_3/examples/Periodic_3_triangulation_3

Since you were on the master branch, the periodic code was missing hence your errors.

Let me know if you have any further issues.

Best,
Mael

On 24/01/2021 17:52, Gianmarco Spera ( via cgal-discuss Mailing List) wrote:

Hello,

sorry if it took me so much time to reply.

I have tried to compile the cgal examples in the repository but I have some errors and I can't understand why.

The error is described in the attached file, and it seems to be related to the absence of the library Periodic_2_Delaunay_triangulation_2_generic.h, which is not in my computer even if cgal is installed. I find a similar error for the three-dimensional example.

I can't find the library Periodic_2_Delaunay_triangulation_2_generic.h in CGAL 5.2 or in the cgal repository you linked me.

CGAL has only  Periodic_2_Delaunay_triangulation_2.h. However, if I compile it with this one,  I get a lot of other errors.

Sorry if the mistake might be silly but I am a newbie in cpp and cgal.

Thanks a lot for your help and your time.

Il giorno lun 14 dic 2020 alle ore 17:27 Mael Rouxel-Labbé <> ha scritto:

Hello,

There is a feature under development that adds support for periodic
triangulations of such domain. You can find a stable (but unfinished)
version here :
https://github.com/MaelRL/cgal/tree/Generic_Periodic_Triangulations
<https://github.com/MaelRL/cgal/tree/Generic_Periodic_Triangulations>.

In this new version of the package, the base domain that is periodically
duplicated is a Voronoi face, described by a lattice basis of vectors; 3
vectors in your 2D case. See the associated paper :
https://drops.dagstuhl.de/opus/volltexte/2020/12941/pdf/LIPIcs-ESA-2020-75.pdf
<https://drops.dagstuhl.de/opus/volltexte/2020/12941/pdf/LIPIcs-ESA-2020-75.pdf>
for more details, explanations on how it works, etc.

The code is developed in the existing package
"Periodic_2_triangulation_2" (and "Periodic_3_triangulation_3" for the
3D version). You should base your code on this example :
https://github.com/MaelRL/cgal/blob/Generic_Periodic_Triangulations/Periodic_2_triangulation_2/examples/Periodic_2_triangulation_2/generic_p2t2.cpp
<https://github.com/MaelRL/cgal/blob/Generic_Periodic_Triangulations/Periodic_2_triangulation_2/examples/Periodic_2_triangulation_2/generic_p2t2.cpp>.

Let me know if you encounter any issue or have any question.

Best,
Mael

On 14/12/2020 09:41, Giammi ( via cgal-discuss
Mailing List) wrote:
> Dear all,
>
> I am a newbie of cpp and cgal.
> I would like to write a code in which particles move in a 2D rectangular
> domain ( with periodic boundary conditions) and then interact with their
> neighbors in a Delaunay triangulation.
> Currently, I am working with a code that has the precondition that the
> domain must be a square and I can't find anything in the documentation that
> could help me in changing the size of the domain.
>
> Therefore, I would like to ask you if there is any package that lets me work
> on a rectangular domain?
>
> Thanks a lot for your help.
>
> Best,
>
> Gianmarco
>
>
>
> --
> Sent from: http://cgal-discuss.949826.n4.nabble.com/
>

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