[vtkusers] vtkStreamer and vtkFunctionSet

[Luca Antiga]

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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