[vtkusers] vtkStreamer and vtkFunctionSet

[Steve Aulenbach]

I'm interested in learning more about the netCDF and HDF readers as well.

Steve

On Fri, 21 Jun 2002, Randy Heiland wrote:

> So when can we begin to see/use this new XML format of which you speak?
>
> --Randy
>
>
> On Jun 21,  8:27am, Berk Geveci wrote:
> > Subject: Re: [vtkusers] vtkStreamer and vtkFunctionSet
> > Oh, did I not mention that we are working on a new (XML based) file
> > format ? :-) This doesn't mean that VTK shouldn't support HDF and
> > netCDF. I believe it should. We have experimented with both and
> > have some readers for specific versions of both. The main problem is
> > that they are very general and require additional information describing
> > which arrays correspond to geometry, which to data etc. Also, netCDF and
> > HDF readers would require additional libraries since we don't want
> > to distribute the libaries with VTK.
> >
> > -Berk
> >
> > On Fri, 2002-06-21 at 03:42, Luca Antiga wrote:
> > > Hi Prabhu,
> > > I agree with you as to file format. By now I use vtkFieldData to store
> > > velocity time steps as vtkFloatArray's (the improvement in data classes
> made
> > > with vtk4.0 was cool) and save the whole in a vtk file. To distinguish data
> > > arrays you can put them in order them or, better, name them, but a more
> > > hierarchical organization of information is needed (maybe making use of
> XML,
> > > so to conform once for all to that standard).
> > >
> > > Since this would mean re-designing some vtk features, I think we'd better
> > > wait for discussion with Berk and collegues.
> > > Hear you soon
> > >
> > > Luca
> > >
> > >
> > > >From: Prabhu Ramachandran <prabhu at aero.iitm.ernet.in>
> > > >To: "Luca Antiga" <lucantiga at hotmail.com>
> > > >CC: vtkusers at public.kitware.com
> > > >Subject: Re: [vtkusers] vtkStreamer and vtkFunctionSet
> > > >Date: Thu, 20 Jun 2002 22:49:58 +0530
> > > >
> > > > >>>>> "LA" == Luca Antiga <lucantiga at hotmail.com> writes:
> > > >
> > > >     LA> Hi Berk, (sorry for the repeated message, I wasn't sure about
> > > >     LA> mail delivery) I needed to track massless particles in a
> > > >     LA> time-varying pulsatile CFD simulation of blood vessels.  I did
> > > >     LA> it by first writing a vtkInterpolatedTransientVelocityField,
> > > >
> > > >[snip]
> > > >
> > > >     LA> vtkStreakLine class which slightly generalize their steady
> > > >     LA> couterparts.  If you want I can send you the code of the three
> > > >     LA> classes.  Thanks for consideration
> > > >
> > > >Sounds great!  Would be nice if this code were part of VTK.  Quite a
> > > >while ago there was talk of creating a more advanced data file format
> > > >for VTK that would support more features.  There was also talk of
> > > >streak lines etc.  Here are a few thoughts I've had.  They are still
> > > >thoughts and I'm not going to have time to implement anything either.
> > > >Effectively this is a wish list.  Just in case someone is listening.
> > > >
> > > >  1. A slightly more intelligent VTK file.  Maybe an additional file
> > > >  format that allows for a more flexible syntax with scope for multiple
> > > >  datasets, something like a #include  etc.
> > > >
> > > >  2. I guess Luca's classes handle integration over time.  So that
> > > >  should be already done.
> > > >
> > > >  3. The ablity to use zipped VTK files.  Would this be useful or are
> > > >  binary files good enough?  Now that zlib is distributed as part of
> > > >  VTK this should not be a problem to implement.
> > > >
> > > >
> > > >cheers,
> > > >prabhu
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