CGAL users discussion list

[Michel Audette <>]

Dear developers,

Mariette, your suggestion seems to have worked. I have a result in a
matter of seconds. Can you tell me if there is a converter for the
.mesh format to something like .vtk ? Equivalently, what do CGAL folks
use to visualize tetrahedral meshes?

Moreover, is there a way of ensuring that the tetrahedralization keeps
the surface triangle boundary faithfully? Although I have not
visualized the result yet, the tet count makes it seem unlikely that
the boundary was preserved.

Best wishes,

Michel

On Fri, Dec 10, 2010 at 4:23 PM, Michel Audette
<>
 wrote:
> Hi Mariette,
>
> thanks for your kind reply. I'll try it your way. Do the other
> parameters appear reasonable?
>
> Best wishes,
>
> Michel
>
> On Fri, Dec 10, 2010 at 4:14 PM, Mariette Yvinec
> <>
>  wrote:
>> your facet angle is too high. It is suppose to be
>> a lower bound for the minimum angle of each facet.
>> A reasonable value is between 20 and 30 degree.
>>
>> Michel Audette wrote:
>>
>> Thanks, Laurent.
>>
>> Seems to work. I'm trying to run the mesh creation with criteria as
>> follows... I'm seeing a high number of tetrahedra though... Higher
>> than I'm expecting.
>>
>> I want high-quality elements of roughly 10mm edges, to begin with. (I
>> would like 20mm later on if I can).
>>
>> Does something like this look reasonable? High facet angle, say 45
>> deg. Facet distance a=10mm. Is the facet size root(3)/4 x a^3 (=43.3),
>> and the cell size root(2)/12 x a^3 (=117.9)?
>>
>> Mesh_criteria criteria(facet_angle=45, facet_size=43, facet_distance=10.0,
>>                          cell_radius_edge=10.0, cell_size=118);
>>
>> Does that make sense, or not necessarily. I seem to be getting more
>> tets "to refine" than I expect.
>>
>> Michel
>>
>> On Fri, Dec 10, 2010 at 1:49 PM, Laurent Rineau (GeometryFactory)
>> <>
>>  wrote:
>>
>>
>> Le vendredi 10 décembre 2010 19:26:28, Michel Audette a écrit :
>>
>>
>> Dear CGAL developers,
>>
>> I'm launching an example based on the code in
>> examples/Mesh_3/mesh_polyhedral_domain.cpp
>>
>> but for the parameters that I gave, it seems to take a long time, and
>> provides no indication on the percent completion.
>>
>> Can the interface be tweaked to make it more verbose?
>> examples/Mesh_3/mesh_polyhedral_domain.cpp
>>
>>
>> Define the macro CGAL_MESH_3_VERBOSE to 1. It will not give you the percent
>> of
>> completion, because the number of vertices at the end of the meshing 
>> process
>> cannot be guessed, but it will show the size of the internal priority
>> queues.
>>
>> --
>> Laurent Rineau, PhD
>> Release Manager of the CGAL Project       http://www.cgal.org/
>> R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
>>
>> --
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>>
>>
>>
>>
>>
>>
>> --
>> Mariette Yvinec
>> Geometrica project team
>> INRIA  Sophia-Antipolis
>>
>>
>>
>
>
>
> --
> Michel Audette, Ph.D.
> R & D Engineer,
> Kitware Inc.,
> Chapel Hill, N.C.
>



-- 
Michel Audette, Ph.D.
R & D Engineer,
Kitware Inc.,
Chapel Hill, N.C.