CGAL users discussion list

[Hansjoerg Seybold <>]

hi,
thanks a lot for the email. Good to know that a clean periodic meshing
is already planned. By linking constraint edges i mean that i fix the number
of mesh nodes for each edge. In this way i can glue the two edge meshes together.

Thanks hj

On Thu, Aug 19, 2010 at 10:47 AM, Monique Teillaud <> wrote:

Hansjoerg Seybold wrote:

Hi,
I read a lot about periodic surface meshes and periodic 3d meshing, but is there a
capability to create  periodic meshes with the normal 2d mesh generator by linking
constraint edges?

Hi,

Currently, CGAL provides users with 3D periodic triangulations and 3D periodic alpha shapes only.
We have a prototype interface between surface/volume meshes and 3D periodic triangulations, that will allow to compute 3D periodic surface/volume meshes. I hope that it will be ready in CGAL 3.8, but there is no guarantee.

There is also work in progress on 2D periodic triangulations, which should at some point allow to compute 2D periodic meshes with CGAL.
No time schedule can be given yet.

I don't really understand what you mean by "linking constraint edges".
What you can probably do, waiting for a clean CGAL solution, is hack some periodic mesh by duplicating 9 times (3x3) your domain and your constraints and mesh the obtained data with the CGAL 2D mesher. Then the  mesh of the central domain can be used as the basic tile for a periodic mesh.

 thanks a lot.

By the way. Does anyone have a SIMPLE makefile for including the cgal library as it has been done in the old times
(e.g. cgal 3.3 where most of the stuff was done by including
 CGAL_MAKEFILE = /local/CGAL-3.3.1/make/makefile_x86-64_Linux-2.6_g++-4.2.3
include $(CGAL_MAKEFILE)
 sorry if i post tow different questions in one thread...

I suggest that you put the second question in another email with an appropriate title, it will increase the chances to get an answer.

Best regards,
       Monique Teillaud

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Monique Teillaud
INRIA Sophia Antipolis - Méditerranée
http://www.inria.fr/sophia/members/Monique.Teillaud/

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