[vtkusers] connectivity filter and hull

[David Netherway]

Hello Lisa,

That worked.

Thanks, David

----- Original Message -----
From: "Lisa Avila" <lisa.avila at kitware.com>
To: "David Netherway" <david.netherway at adelaide.edu.au>;
<vtkusers at public.kitware.com>
Sent: Thursday, 23 May, 2002 5:56 AM
Subject: Re: [vtkusers] connectivity filter and hull


> Hello David,
>
> I suspect that vtkPolyDataConnectivityFilter is passing all the points
> through and vtkHull is working off of the points. You can through in a
> vtkCleanPolyData in between to clean out the unused points.
>
> Lisa
>
>
> At 01:42 AM 5/21/2002, David Netherway wrote:
> >Hello vtkusers,
> >
> >I am using the following:
> >
> >vtkImageData->vtkContourFilter->vtkPolyDataConnectivyFilter->vtkHull
> >
> >with the connectivity set using "SetExtractionModeToLargestRegion".
> >
> >The hull surrounds all of the isosurface not just the largest surface.
> >
> >If I set the connectivity to "SetExtractionModeToClosestPointRegion" and
set
> >the point near the largest surface then the hull surrounds just the
largest
> >surface as expected.
> >
> >If I use the following I get the expected behaviour:
> >
>
>vtkImageData->vtkContourFilter->vtkPolyDataConnectivyFilter->vtkDecimatePro
-
> > >vtkHull
> >
> >Does anyone get the expected behaviour for the first pipeline above or
know
> >of the problem?
> >
> >I am using vtk4.1.1 Revision 1.1215 from May 14, 2002 on a windows
platform.
> >
> >Thanks, David
> >
> >----- Original Message -----
> >From: "ady roman" <ady_roman at yahoo.com>
> >To: <vtkusers at public.kitware.com>
> >Sent: Tuesday, 21 May, 2002 1:26 AM
> >Subject: [vtkusers] DecimatePro and deciFranCut example
> >
> >
> > >
> > > Could some explain me how to use DecimatePro Filter?
> > > I don't quite understand what the deciFranCut example
> > > does :
> > >
> > > set topologies "On Off"
> > > set accumulates "On Off"
> > > foreach topology $topologies {
> > >   foreach accumulate $accumulates {
> > >     vtkDecimatePro deci$topology$accumulate
> > >       deci$topology$accumulate SetInput [fran
> > > GetOutput]
> > >       deci$topology$accumulate SetTargetReduction .95
> > >       deci$topology$accumulate
> > > PreserveTopology$topology
> > >       deci$topology$accumulate
> > > AccumulateError$accumulate
> > >     vtkPolyDataMapper mapper$topology$accumulate
> > >       mapper$topology$accumulate SetInput
> > > [deci$topology$accumulate GetOutput]
> > >     vtkActor fran$topology$accumulate
> > >       fran$topology$accumulate SetMapper
> > > mapper$topology$accumulate
> > >       fran$topology$accumulate SetTexture atext
> > >   }
> > > }
> > >
> > > How can I do this in C++?
> > >
> > > Regards,
> > > A.Roman
> > >
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