[Paraview] particletracer, vectors menu?

[John Biddiscombe]

Berk

Good point. I forgot all about that. We should add a check. The trouble 
is, how does the pv gui know that ParticleTracer needs time? Detecting 
the output is easy becuase the filter already exists and stesp can be 
queried, but the input is only declared in the XML as input <dataobject> 
- do we have to add an XML flag to say Input requirements point vectors, 
dataobject and Time steps?

I'll add the bug/feature request

JB

> John,
>
> Did you try what happens if you connect a source that doesn't support
> time? I didn't want to commit a fix without checking that. We should
> probably add support to paraview to detect a dataset that has time in
> it. This is already done for sources/readers and can be expanded to
> any algorithm. If you want, post a request in the bug tracker and I'll
> look into it in a few weeks.
>
> -berk
>
> On 2/15/08, John Biddiscombe <biddisco at cscs.ch> wrote:
>   
>> Berk wrote:
>>  > This is actually simple to fix. In the filters xml
>>  > (Servers/ServerManager/Resources/filters.xml), ParticleTracer says it
>>  > is expecting a vtkTemporalDataSet input. However, in some cases, the
>>  > input may look like a vtkUnstructuredGrid, for example. The input type
>>  > for ParticleTracer should be set to vtkDataObject to fix this. I am
>>  > attaching a patch. I am not sure this is the best way to fix this in
>>  > the main repository so I am not committing it yet.
>>  >
>>
>>
>> I don't know why I had trouble yesterday, but as Berk says, it should be
>>  vtkDataObject as input not vtkTemporalDataset - and when I put this in,
>>  I was able to do particle tracing on a volume (vtkImageData) dataset.
>>  (Didn't try the LEA one, but it's safe to assume it'll work).
>>
>>  For those that care - vtkTemporalDataset should not generally be
>>  imported directly by a filter, instead the filter should request
>>  multiple time steps and let the executive create the temporal wrapper.
>>  We have one use case (referred to in my xdmf post which causes trouble,
>>  but we'll fix that eventually).
>>
>>
>>  JB
>>
>>
>>     


-- 
John Biddiscombe,                            email:biddisco @ cscs.ch
http://www.cscs.ch/about/BJohn.php
CSCS, Swiss National Supercomputing Centre  | Tel:  +41 (91) 610.82.07
Via Cantonale, 6928 Manno, Switzerland      | Fax:  +41 (91) 610.82.82