CGAL users discussion list

[Dominik Szczerba <>]

Indeed, I am talking about generating tets from segmented images.

As I said, I am getting 12 orders of magnitude span in the element
sizes, which makes the resulting mesh unsuitable to some computations.
In particular, I am running out of numerical precision on such meshes
in some cases. Are there practical ways to prevent this from
happening?

Dominik

On Thu, Dec 2, 2010 at 10:44 AM, Laurent Rineau (GeometryFactory)
<>
 wrote:
> On Wednesday 01 December 2010 22:00:45 Dominik Szczerba wrote:
>> Hi
>>
>> I need to impose LOWER bound on element size. According to the latest
>> documentaiton:
>>
>> the radius bound: This parameter controls the size (edge length) of
>> mesh cells. Actually, it is an upper bound on the circumradii of the
>> mesh tetrahedra.
>>
>> I can only provide the UPPER bound. However, in my cases, the smallest
>> generated element is 10 orders of magnitude smaller than the biggest
>> one, resulting in numerical precision problems in subsequent
>> computations.
>>
>> Is there a way to specify the SMALLEST allowed element size or
>> otherwise control its size?
>
> My guess is that you are talking about one of the mesh generators of CGAL.
>
> Anyway, both the 2D-, surface-,or 3D- mesh generators of CGAL work the same
> way: you cannot specify a lower bound on the elements sizes.
>
> --
> Laurent Rineau, PhD
> R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
> Release Manager of the CGAL Project       http://www.cgal.org/
>
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