[vtkusers] Delaunay surface triangulation in 3D

[Bill Lorensen]

vtkGeometryFilter will extract surface cells from a volumetric mesh.

On Fri, Oct 17, 2008 at 10:39 AM, Doug Hackworth
<doug.hackworth at vanderbilt.edu> wrote:
>
> Greetings.  I have a set of N points that reside on the surface of a sphere,
> and I'd like to create a triangular (not tetrahedral) mesh between these
> points via Delaunay triangulation.  Using vtkDelaunay2D is out because it
> does a different thing (ignoring the Z-coordinate during its triangulation).
>  And using vtkDelaunay3D only does part of the right thing -- it appears to
> triangulate the surface points nicely, but also creates (as its primary
> function) a tetrahedral mesh among all the points in 3 dimensions.
>
> How can I get a triangulated surface?  Just to be clear on what I want, the
> end result should be a hollow volume of triangles, rather like a geodesic
> dome.  That make sense?
>
> It seems as if using vtkDelaunay3D and then extracting the surface triangles
> only could be a promising course of action, but I have no idea how to do
> this (I'm also not sure that it's guaranteed to produce the right result).
>  Can someone offer some guidance on this?  Is there an alternative method
> that would be better?  Please, offer me your wisdom.  :-)
>
> Thanks,
> Doug
>
> _______________________________________________
> This is the private VTK discussion list.
> Please keep messages on-topic. Check the FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
>