[vtkusers] Time - varying vector field
Gerard Gorman
g.gorman at imperial.ac.uk
Fri Oct 10 11:22:53 EDT 2003
Can you give a non-committal estimate as to when this would be released.
If it was soonish it would save me from having to mess about with hdf5.
CHeers
g
Berk Geveci wrote:
> I understand your pain and don't worry help is coming :-)
> We have plans to add time support to at least the XML readers.
> We have already started prototyping ideas in ParaView.
> Currently, time is partially supported in ParaView's
> "pvd" file format. This consists of an XML based meta-file
> pointing to regular VTK data files. The readers has methods
> for selecting datasets based on a list of attributes (for example,
> time) specified in the meta-file. It is also possible to
> suppport things like multi-block and AMR datasets in this
> format. We have more work to do before this can be put in
> VTK.
>
> -Berk
>
> On Fri, 2003-10-10 at 04:02, Gerard Gorman wrote:
>
>>I have been tricking with time varying stuff in vtk for a while - mostly
>>for particle tracing. I have thought that is was a pity that the new vtk
>>XML format, which even has support for multiple partitions, did not also
>>add support for time. This poses a problem in terms of writing generic
>>applications that work with time varying data as the applications has to
>>be made aware of what files are in the time series, what order they are
>>in time, etc. I am considering using HDF5 for this instead (
>>http://hdf.ncsa.uiuc.edu/HDF5/papers/prototypes/mesh/). But this then
>>leads to the problem that I'd have to get my hands on a vtk reader for
>>this (there is a hdf4 reader out there but I haven't found hdf5) - ok
>>there is hdf5utils but if I'm going to start extracting instances of vtk
>>objects out of this when I might as well have stuck with the vtk format
>>in the first place. Even more on the down side, it worries me that the
>>API mentioned above is version 0.9 suggesting it's only beta - though
>>it's been around for a while.
>>
>>I realise that this is only a small part of the problem with time
>>varying visualisation but I think it's an important part when it comes
>>to implementing anything that will work for ones own data and some third
>>party who later tries to use your code for their data.
>>
>>Anyhow, that's my rant over - I'm really interested to hear any comments
>>on or off the list.
>>
>>Cheers
>>g
>>
>>Berk Geveci wrote:
>>
>>>Currently, VTK has no direct support for time dependent fields.
>>>The pipeline does not recognize time as a fourth dimension.
>>>There are no filters to compute particle traces or streaklines
>>>in unsteady fields. You have to write your own filters to
>>>handle time dependence. The streamtracer filter was written
>>>with time in mind, however. It is possible to modify it to
>>>handle time and integrate particle traces. Streaklines can
>>>then be generated using the particle integrator.
>>>
>>>-Berk
>>>
>>>On Thu, 2003-10-09 at 09:54, Uwe Köhler wrote:
>>>
>>>
>>>>-----BEGIN PGP SIGNED MESSAGE-----
>>>>Hash: SHA1
>>>>
>>>>Hi,
>>>>
>>>>I am looking for the best way to store time-varying vector data in a VTK data
>>>>structure. Has anyone got experience with that. So far, I only had to handle
>>>>steady vector fields. How do a visualize particle traces, streaklines?
>>>>
>>>>Any help would be greately appreciated
>>>>
>>>>Uwe
>>>>
>>>>- --
>>>>| |
>>>>- -+-----------------------------------------------------------------+-
>>>>| Dr. Uwe Köhler |
>>>>| D - Berlin |
>>>>| //// Germany |
>>>>| (@ @) Phone: +49 172 98 11 598 |
>>>>- -+-----oOO--(_)--OOo-----------------------------------------------+-
>>>>| <URL:http://www.ed.ac.uk/~ukoehler> <mailto:U.Koehler at gmx.de> |
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>>>>
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>
>
>
--
----------------------------------------------------------
Gerard Gorman (PhD Student)
Applied Modelling and Computation Group
Earth Science and Engineering
Imperial College
Prince Consort Road Tel. 00 44 +207 594 9323
London SW7 2BP Fax. 00 44 +207 594 9321
U.K. o~o A good slogan beats a good solution.
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