[vtkusers] Re: progressive tetrahedral mesh

[Toon Huysmans]

Hi Matthias,

        in that post I was looking for something different, a progressive
"tetrahedral" mesh. My
        mesh consisted out of tetrahedrons instead of triangles and
vtkDecimatePro does not
        support that.

        For your question: Since you want access to each step in the
progressive transition, i
        suppose you want to do some processing on the mesh.  In that case
you have to keep
        in mind that vtk is a visualization toolkit and that processing of
your data should be done
        in your own class-library, once the processing is done you can pass
the result to vtk
        and visualize it.

        There are some libs available for progressive meshes, for example
OpenMesh (which I use):

            http://www.openmesh.org

        Writing a filter that converts a OpenMesh-mesh to  vtkPolyData is
easy....

        Hope this helped

Toon.

----- Original Message ----- 
From: "matthias specht" <specht at ifi.unizh.ch>
To: <denhuys at hotmail.com>
Sent: Friday, October 01, 2004 11:36 AM
Subject: progressive tetrahedral mesh


> hi toon,
> I saw you (old) post on the vtkusers list and was wondering how you
> solved the problem since I'm looking for the same thing.
> I understood that vtkDecimatePro does the steps to create a progressive
> mesh; however it only lets you access the decimated mesh, without the
> sequence of edce collapses.
>
> So I guess one could "hack" that code to output the whole progressive
> mesh data structure...
>
> If you found a solution, would you give me (and/or the whole vtk
> comunity) access to the source code?
>
> regards
> matthias
>
>
> [vtkusers] Progressive Tetrahedral mesh
>
> *Toon Huysmans* denhuys at hotmail.com
>
<mailto:vtkusers%40vtk.org?Subject=%5Bvtkusers%5D%20Progressive%20Tetrahedra
l%20mesh&In-Reply-To=>
> /Mon May 3 06:11:10 EDT 2004/
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> ------------------------------------------------------------------------
>
> Hi all,
>
>     I`m looking for a multi-resolution tetrahedral mesh class, which uses
vertex-split and edge-collapse operations for obtaining different
resolutions.  I plan to use it together with vtk, maybe subclass
vtkUnstructuredGrid.
>
> Does anyone know of such a class in vtk or would like to share his
implementation of such a class?  Otherwise does anyone know of a library
outside of vtk, which does the same?
>
> Thanks,
>
> Toon.
>
> -- 
> matthias specht
> | mailto:specht at ifi.unizh.ch  http://www.ifi.unizh.ch/staff/specht
> office
> | multimedia lab, computer science department, university of zurich
> | winterthurerstr. 190, 8057 zurich, switzerland
> | phone +41-1-635-4565 fax +41-1-635-6809
>
>