[Paraview] Losing data when clip multi-block

[Eric E. Monson]

Hey Utkarsh,

No, I've never seen the clip lose data on one dataset by itself.

The other interesting thing is that I can't always get this data loss  
to happen if the data was generated as part of a source from the  
Sources menu. It's much more likely to disappear when the data was  
generated by a filter or brought in by a reader.

For example, if you generate a Box and a Wavelet source, grouping and  
clipping them won't lose any data, but if you run Generate IDs on one  
of them, then select GenerateIds1 second before grouping, then clip,  
the "Ids" point data disappears...

Thanks,
-Eric


On Feb 6, 2009, at 7:37 AM, Utkarsh Ayachit wrote:

> Eric,
>
> Does the loss of arrays happen even if you clip the orginal dataset by
> itself (without grouping it using the group filter)?
>
> Utkarsh
>
> On Wed, Feb 4, 2009 at 3:53 PM, Eric E. Monson <emonson at cs.duke.edu>  
> wrote:
>> Hello,
>>
>> I'm creating a multi-block data set using the group filter and then  
>> clipping
>> it. The results of the clip are always missing one of the scalars  
>> associated
>> with the second data set that I highlighted before applying the group
>> filter. This only seems to happen if one of the data sets has  
>> multiple
>> scalars or vectors associated with it -- if they each only have  
>> one, nothing
>> is lost in the clip. (ParaView 3.4 and CVS, OS X 10.5.6 and Windows  
>> XP
>> 32-bit, no MPI)
>>
>> I originally saw this with my own data, but I am able to easily  
>> replicate
>> this by creating two point sources. I apply the Elevation filter to  
>> the
>> first. Then, to the second I apply Brownian Vectors, plus a  
>> Calculator that
>> computes the magnitude of those vectors. If I highlight Elevation  
>> and then
>> Calculator, then Group and Clip, I lose the vector magnitude scalar  
>> at the
>> Clip stage. If I highlight the Calculator and then the Elevation,  
>> then Group
>> and Clip, I lose the elevation scalar.
>>
>> Please let me know if anyone has any ideas about where this could  
>> be coming
>> from.
>>
>> Thanks a lot,
>> -Eric
>>
>> ------------------------------------------------------
>> Eric E Monson
>> Duke Visualization Technology Group
>>
>>
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