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

[Dominik Szczerba]

OK, sorry, in this file I did not apply surfaceVectors. If I do, it works.
However, my own file still does not work. Here the file:

http://www.vision.ee.ethz.ch/~domi/tmp/problem.vtk

Does it matter that it is a quadratic mesh maybe?

- Dominik

Utkarsh Ayachit wrote:
> Weird. It works for me just fine (snapshot attached). Here are few 
> things to ensure:
> 
> * Reader: ensure "V" is loaded
> * SurfaceVectors: "Select Input Vectors" == "V" and "Constraing Mode" == 
> "Parallel"
> * StreamTracer: "Vectors" == "V"
> 
> I used all default values for this visualization (except enabling "V" on 
> the reader and then switching "Seed Type" to Line Source)
> 
> Utkarsh
> 
> Dominik Szczerba wrote:
>> 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