[Paraview] Quadric Clustering on 3D Unstructured Grid (PV3.2)

[Randall Hand]

Quadric Clustering only applies to Polygonal datasets.  Volumetric Datasets
cannot be decimated via the Quadric Clustering algorithm.  Using the Extract
Surface simply extracts a polygonal outer surface from your volume which is
why you're then able to use it.


On Nov 13, 2007 8:10 AM, Simone Crippa <crippa at kth.se> wrote:

> Hi,
>
> OK, sorry I misread your post ... I obviously thought that you want to
> apply quadric clustering on a boundary grid.
> I hope somebody else can help you out on how to do it for a volume
> dataset, as I also didn't manage so far with it!
>
>
> /Simone
>
>
>
> Sylvester Gerardson wrote:
> > Hi Simone,
> >
> > Thank you for your answer.
> >
> > I am not sure I understand your suggestion. When I apply the 'Extract
> > Surface' filter only my (3D) surfaces remain and the Quadric
> > Clustering filter becomes available.
> >
> > But I need the volume cells, not the surfaces. Am I doing something
> wrong?
> >
> > regards,
> > Sylvester
> >
> >
> > On 11/13/07, Simone Crippa <crippa at kth.se> wrote:
> >> Hi,
> >>
> >> the way I do it is to extract first the surface of the unstructured
> grid
> >> (vtkDataSetSurfaceFilter), then it is possible to use quadric
> clustering.
> >>
> >>
> >> /Simone
> >>
> >>
> >>
> >>
> >> Sylvester Gerardson wrote:
> >>> Hi All,
> >>>
> >>> How do I apply the Quadric Clustering filter to a 3D Unstructured
> Grid? (it
> >>> is greyed out in the menu) Or is there another way to coarsen the
> mesh?
> >>> I've used it with great success on 2D cutplanes.
> >>>
> >>> A bit of coding and compiling is not a problem for me.
> >>>
> >>> Thank you.
> >>>
> >>> Sylvester
> >>>
> >>> _______________________________________________
> >>> ParaView mailing list
> >>> ParaView at paraview.org
> >>> http://www.paraview.org/mailman/listinfo/paraview
> >>
> >> --
> >> Simone Crippa
> >> Research assistant, Dipl.-Ing.
> >> Royal Institute of Technology (KTH)
> >> Aeronautical and Vehicle Engineering
> >> Division of Aerodynamics
> >> Teknikringen 8
> >> SE-10044 Stockholm, Sweden
> >> +46 (0)8 790 6465
> >>
>
>
> --
> Simone Crippa
> Research assistant, Dipl.-Ing.
> Royal Institute of Technology (KTH)
> Aeronautical and Vehicle Engineering
> Division of Aerodynamics
> Teknikringen 8
> SE-10044 Stockholm, Sweden
> +46 (0)8 790 6465
> _______________________________________________
> ParaView mailing list
> ParaView at paraview.org
> http://www.paraview.org/mailman/listinfo/paraview
>



-- 
----------------------------------------
Randall Hand
Visualization Scientist
ERDC MSRC-ITL
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