[vtkusers] Using filters

Amy Henderson amy.henderson at kitware.com
Fri Mar 14 11:39:55 EST 2003


At 11:24 AM 3/14/2003 -0500, Arun Nagarajan wrote:
>Ah, ok. That makes more sense. Another question. In the man page for
>ImageToPolyDataFilter class, there is a note saying:
>
>The input linear lookup table must be of the form of 3-component unsigned
>char
>
>What exactly is a 3-component unsigned char?

Each entry in the lookup table is made up of 3 unsigned chars -- to specify 
RGB colors.

>Thanks.
>
>Arun
>
>----- Original Message -----
>From: "Amy Henderson" <amy.henderson at kitware.com>
>To: "Arun Nagarajan" <arun at cis.jhu.edu>; <vtkusers at public.kitware.com>
>Sent: Friday, March 14, 2003 11:18 AM
>Subject: Re: [vtkusers] Using filters
>
>
> > Hi Arun,
> >
> > vtkStructuredPointsToPolyDataFilter is an abstract superclass for various
> > filters that take a vtkStructuredPoints as input and produce a vtkPolyData
> > as output.  You're probably looking for something like
> > vtkImageToPolyDataFilter (a concrete subclass of
> > vtkStructuredPointsToPolyDataFilter).
> >
> > - Amy
> >
> > At 11:07 AM 3/14/2003 -0500, Arun Nagarajan wrote:
> > >Hi,
> > >
> > >I am new to filters and I am trying to read in a structured points file
>and
> > >write it out as a polygonal data file. I am basically trying to use the
> > >StructuredPointsToPolyDataFilter class located at
> >
> >http://www.vtk.org/doc/nightly/html/classvtkStructuredPointsToPolyDataFilte
>r
> > >.html. There are no examples there and I was wondering if anyone can show
>me
> > >a basic skeleton of how a filter works.
> > >
> > >Thanks.
> > >
> > >Arun
> > >
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> >
> >
> >
>
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