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- From: "Laurent Rineau (GeometryFactory)" <>
- To:
- Subject: Re: [cgal-discuss] Re: Convert C3t3 to Polyhedron
- Date: Tue, 27 Mar 2012 18:08:07 +0200
- Organization: GeometryFactory
Le mardi 27 mars 2012 08:49:45 Zohar a écrit :
> I see, I look at the sources and the c3t3 facet iterator contains the
> triangulation iterator. I need to go over this material, thanks.
>
> Here is my bug report:
> http://cgal-discuss.949826.n4.nabble.com/Bug-report-Mesh-generation-with-c2t
> 3-fails-td4509196.html
>
> I'll to phrase my last question as a yes/no question:
>
> 1. I have poly S.
> 2. I execute c2t3 remesher (polyhedron demo) on S, and produce poly P1.
> 3. I execute c3t3 mesh tet (mesh demo) and then convert to poly P2.
> 4. Concerning the surface, I use the same parameters for both algorithms.
>
> Is P1 == P2 ?
No. Whatever parameters you have chosen for the steps 2 and 3 you described,
the two algorithms do not guarantee to produce the same surface meshes.
The Surface Mesh Generator generates triangulated surface meshes embedded in
3D Delaunay triangulations. Note that those surface meshes can be manifold of
not, depending on the input surfaces, and chosen parameters.
The 3D Mesh Generator generates tetrahedral meshes embedded in 3D regular
triangulations.
They are different implementations of a Delaunay triangulation refinement
algorithm.
> Explanation: I'm trying to understand what's the difference between the two
> algorithms (they both rely on [BO05] reference), and what are the additional
> volume parameters in the mesh demo.
Please compare the two sections "Design and Implementation History" of their
respective user manuals:
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Surface_mesher/Chapter_main.html#Section_47.7
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Mesh_3/Chapter_main.html#Section_50.1
The parameters used in the demo are described in the reference page for the
CGAL::Mesh_criteria_3 class template:
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Mesh_3_ref/Class_Mesh_criteria_3.html
If you still have questions after reading those sections or pages, I can
enter
details, but for the moment I cannot tell you more.
--
Laurent Rineau, PhD
R&D Engineer at GeometryFactory http://www.geometryfactory.com/
Release Manager of the CGAL Project http://www.cgal.org/
- Re: [cgal-discuss] Re: Convert C3t3 to Polyhedron, (continued)
- Re: [cgal-discuss] Re: Convert C3t3 to Polyhedron, Sebastien Loriot (GeometryFactory), 03/23/2012
- [cgal-discuss] Re: Convert C3t3 to Polyhedron, Zohar, 03/24/2012
- Re: [cgal-discuss] Re: Convert C3t3 to Polyhedron, Sebastien Loriot (GeometryFactory), 03/25/2012
- Re:Re: [cgal-discuss] Re: Convert C3t3 to Polyhedron, Yan Shijiang, 03/25/2012
- Re: [cgal-discuss] Re: Convert C3t3 to Polyhedron, Philipp Moeller, 03/25/2012
- Re:Re: [cgal-discuss] Re: Convert C3t3 to Polyhedron, Yan Shijiang, 03/25/2012
- Re: [cgal-discuss] Re: Convert C3t3 to Polyhedron, Sebastien Loriot (GeometryFactory), 03/25/2012
- Re: [cgal-discuss] Re: Convert C3t3 to Polyhedron, Sebastien Loriot (GeometryFactory), 03/23/2012
- [cgal-discuss] Re: Convert C3t3 to Polyhedron, Zohar, 03/25/2012
- Re: [cgal-discuss] Re: Convert C3t3 to Polyhedron, Sebastien Loriot (GeometryFactory), 03/26/2012
- [cgal-discuss] Re: Convert C3t3 to Polyhedron, Zohar, 03/27/2012
- Re: [cgal-discuss] Re: Convert C3t3 to Polyhedron, Laurent Rineau (GeometryFactory), 03/27/2012
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