[Paraview] Why is PKdTree used for IMAGE Volume Rendering?

[Utkarsh Ayachit]

Kevin,

Attached is a patch. Can you verify that it works after applying the
patch? If so, I'll commit it to CVS.

Thanks
Utkarsh

On Thu, Feb 12, 2009 at 4:45 PM, Kevin H. Hobbs <hobbsk at ohiou.edu> wrote:
> On Thu, 2009-02-12 at 15:34 -0500, Utkarsh Ayachit wrote:
>> Ah and there's the bad news.
>> In case of image data for the "if" condition at vtkPKdTree.cxx:435,
>> I'd expect the condition to succeed and go to
>> this->ProcessUserDefinedCuts(..) however, it seems like that condition
>> is failing and it's going to this->MultiProcessBuildLocator(..) which
>> is used for unstructured datasets.
>>
>> Are you able to reproduce the behavior with a simpler dataset (say
>> wavelet) or something that;s already in ParaViewData, or some dataset
>> that I can try it with?
>
> Yes, I was able to reproduce the problem with the wavelet source data.
> and I got a new datum as well.
>
> It seems I have to load the large image from a .vti file for the error
> to occur.
>
> The error does not occur when I create a large image in parallel with
> the wavelet source.
>
>>  Also give me all the steps to reproduce the
>> problem (since I am not able to reproduce it with 5 procs using
>> Wavelet source).
>>
>> Utkarsh
>
> In paraview connected to the builtin server I created a wavelet source
> with extents 0 1958 0 1498 0 77 to match my file.
>
> I then saved that to a vti file.
>
> I then restarted paraview and started a 2 core server that the dialog
> runs with
>
>        mpirun -np 2 \
>                /home/kevin/kitware/ParaView3_Build/bin/pvserver \
>                --use-offscreen-rendering
>
> I loaded the image then selected volume rendering for the
> representation.
>
> Then BLAMO swap-death.
>
>
>
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