[Paraview] streamline tracer does not work on cut filter results

[Dominik Szczerba]

I load 'V' from that dataset, cut it in YZ or XZ plane, chose line 
source, and the streamlines do not make any sense, they are normal 
(sic!) to the cut plane. Strealining the original 3D dataset, however, 
makes sense. Can it confirm it works for you?

Here is my screenshot:

http://www.vision.ee.ethz.ch/~domi/tmp/snapshot7.png

CVS, several days old.

-- Dominik



Utkarsh Ayachit wrote:
> Can you try reproducing the issue using the disk_out_ref.ex2 data set 
> provided with in ParaViewData?
> 
> Utkarsh
> 
> Dominik Szczerba wrote:
>> Thanks for a hint, but no, applying SurfaceVectors prior to 
>> StreamTracer does not help. I made sure the line is in plane. I manage 
>> to get a few very short bits of streamlines but they die out quick. So 
>> indeed sounds like in-plane accuracy. I checked the range of my 
>> velocity and after SurfaceVectors the range in the plance normal 
>> direction is NOT zero. I used the Calculator to put it explicitly to 
>> zero, but it did not help either. BTW. I can correctly display 
>> velocity as glyphs on the cut. Anything else I can do to make sure it 
>> is not a bug?
>>
>> -- Dominik
>>
>> Utkarsh Ayachit wrote:
>>> Try using the "Surface Vectors" filter to project the vectors onto 
>>> the cut plane. Also, you have to ensure that the seed point is on the 
>>> surface (which may be tricky with a point clound, use the line source 
>>> instead for seeding streamlines).
>>>
>>> Utkarsh
>>>
>>> On Tue, Jun 17, 2008 at 9:02 AM, Dominik Szczerba 
>>> <domi at vision.ee.ethz.ch <mailto:domi at vision.ee.ethz.ch>> wrote:
>>>
>>>     I noticed that if I cut my tet mesh with cut filter I can no longer
>>>     plot streamlines. I tried finetuning the parameters -> no luck.
>>>     Works perfect on the original 3D dataset with no tweaks. Any ideas?
>>>     Thanks.
>>>     --     Dominik Szczerba, Ph.D.
>>>     Biomedical Simulation Group
>>>     Computer Vision Lab CH-8092 Zurich
>>>     http://www.vision.ee.ethz.ch/~domi
>>>     <http://www.vision.ee.ethz.ch/%7Edomi>
>>>     _______________________________________________
>>>     ParaView mailing list
>>>     ParaView at paraview.org <mailto:ParaView at paraview.org>
>>>     http://www.paraview.org/mailman/listinfo/paraview
>>>
>>>
>>

-- 
Dominik Szczerba, Ph.D.
Biomedical Simulation Group
Computer Vision Lab CH-8092 Zurich
http://www.vision.ee.ethz.ch/~domi