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RE: [cgal-discuss] Point location in tetrahedral meshes


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  • From: Püttmann, Andreas <>
  • To: "" <>
  • Subject: RE: [cgal-discuss] Point location in tetrahedral meshes
  • Date: Sat, 10 Dec 2011 10:07:15 +0100
  • Accept-language: en-US, de-DE
  • Acceptlanguage: en-US, de-DE

Thanks for your quick answer!
I will try your suggestions and mail again, if I run into troubles.
________________________________________
From: Sebastien Loriot (GeometryFactory)
[]
Sent: Friday, December 09, 2011 9:31 AM
To:

Subject: Re: [cgal-discuss] Point location in tetrahedral meshes

You can embedded your mesh into a Triangulation_3 and then use the
locate function. Note that you need to have a triangulate of the convex
hull of your domain (you can use a Cell type with info to have a
is_in_domain tag). All you need to do must be done at the TDS level. My
advice would be to look at how copy_tds is implemented to see how you
could modify it to import you own triangulation

http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Triangulation_3_ref/Class_Triangulation_3.html
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/TriangulationDS_3_ref/Concept_TriangulationDataStructure_3.html
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Triangulation_3_ref/Class_Triangulation_cell_base_with_info_3.html


Another solution is to use CGAL to generate the 3D mesh:
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Mesh_3/Chapter_main.html

Sebastien.

Andreas Puettmann wrote:
> Hi all!
>
> For CFD post processing, I want to interpolate Finite Element solutions
> from a purely tetrahedral 3D mesh to a new mesh of arbitrary elements.
>
> Hence, I am looking for an algorithm which can efficiently perform a
> point location search in 3D on tetrahedral meshes of *non-convex* domains.
>
> I'd appreciate very much, if anyone could point me to either a ready
> implementation for that or to how this could be realized with CGAL.
>
> Cheers,
> Andreas
>
> --
> Dipl.-Ing. Andreas Puettmann
>
> Institute of Bio- and Geosciences
> IBG-1: Biotechnology
> Research Center Juelich
>
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> Web www.fz-juelich.de/ibt/modsim
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