CGAL users discussion list

[Hamid G <>]

Sascha,

Would you mind elaborating on what exactly you did? I have same
problem and using varying sizing field didn't help me either.

thanks in advance,

On Mon, Sep 17, 2012 at 3:37 PM, Sascha Zelzer
<>
 wrote:
> Hi,
>
> I was finally able to construct a suitable set of seed points and run the
> mesh generation step successfully.
>
> Many thanks for your hints!
>
> Before my first posting to this list, I have tried using a CGAL::SizingField
> and setting different values for the tet radii for the different
> sub-domains. That did obviously not work out and I now know it is because of
> an inappropriate default seed point set.
>
> Thanks,
>
> Sascha
>
>
> On 09/10/2012 09:57 AM, Mariette Yvinec wrote:
>
> Currently,
> the best way to ensure that small component are mot missed
> is to set initial points in them or on them boundary.
> Then you have to use refine_mesh_3 instead of
> make_mesh_3 for your initaial seeding points to be taken into account.
>
> Another way, if you know the area where the small components are supposed to
> be,
> is to define a  variable sizing field with a value locally similar to the
> size of the components
> to be meshed.
>
>
>
> Le 30/08/12 16:18, Sascha Zelzer a écrit :
>
> Hi,
>
> I have posted about my problem already here
> http://cgal-discuss.949826.n4.nabble.com/3D-volume-mesher-ignoring-small-subdomains-td4655756.html
> but thought I reformulate it:
>
> I have a labeled image as input to make_mesh_3 which contains a small
> sub-domain (label 2) inside a larger domain (label 1). Small meaning the its
> characteristic size is about two orders of magnitude smaller then the
> embedding domain.
>
> So my question is, what are the criteria for refining cells in the large
> domain to ensure that they do not "shadow" a complete small sub-domain? I
> would like to be able to set a large maximum cell size for the large domain
> and a suitable cell size for small sub-domain. When setting the cell and
> facet criteria in such a way, my small sub-domain is ignored however.
>
> Any tips would be highly appreciated.
>
> Thanks,
>
> Sascha
>
>
> --
> Mariette Yvinec
> Geometrica project team
> INRIA  Sophia-Antipolis
>
>
>