[Paraview] Fwd: Particle tracer

[Dan Lipsa]

Leo,
Thank you very much. That was the problem.

I am also very happy to see that vtkParticleTracer, vtkParticlePathFilter
and vtkStreaklineFilter now have tests in the nightly build (it was not the
case for
vtkTemporalPathLineFilter in VTK 5.10 release).

Thank you very much for your answers and for the improvements in streamline
tracing.

Best,
Dan





On Tue, Nov 20, 2012 at 3:17 PM, Yuanxin Liu <leo.liu at kitware.com> wrote:

> For Pathline/Streakline filters, did you set the TerminationTime
> parameter? The default is zero. By the way, unlike the ParticleTracer,
> these two do not work immediately with the animation control. You must
> explicitly animate the TerminationTime parameter.
>
> Leo
>
>
> On Tue, Nov 20, 2012 at 5:43 AM, Dan Lipsa <dan.r.lipsa at gmail.com> wrote:
>
>> Leo,
>> Thanks for the suggestion with the calculator filter. I was able to use
>> it to increase the velocity and see the particles moving as they should
>> (ParticleTracer).
>> Just a small note here, I see an warning when I use the First Frame (0)
>> button. The warning does not seem to have any ill effects however.
>>
>>
>> Warning: In
>> /home/utkarsh/Dashboards/MyTests/NightlyMaster/ParaViewSuperbuild-Release/paraview/src/paraview/VTK/Filters/FlowPaths/vtkParticleTracerBase.cxx,
>> line 1372
>>
>> vtkPParticleTracer (0x6a93c50): Can't go backward
>>
>>
>>
>> I still had no luck with the ParticlePath filter. I follow the same steps
>> as for the ParticleTracer but the Information box shows me 'Number of
>> Cells': 0 and 'Number of Points': 7 and no points or traces are displayed.
>> Do you have any suggestions on what might be wrong with the ParticlePath
>> filter.
>>
>> For the StreakLine filter the number of cells is 7 and number of points
>> is 7 which seems correct. However no tracing of streaklines happens either.
>> Paraview goes very fast through the time steps when I press the Play button
>> (the same as for the ParticlePath filter). Do you have any suggestions for
>> the StreakLine filter?
>>
>> Dan
>>
>>
>>
>>
>> On Mon, Nov 19, 2012 at 9:06 PM, Yuanxin Liu <leo.liu at kitware.com> wrote:
>>
>>> Yes. Please try to put the source at the high velocity region.  You can
>>> also use the calculator filter to increase the velocity.
>>>
>>> Unlike the previous ParaView,  you don't attach another filter after
>>> ParticleTracer to get path lines/streak lines.  Just use ParticlePath
>>> filter / StreakLine filter.  You can find a summary these features on
>>> page of 11 the Kitware Source July issue<http://www.kitware.com/media/thesource/jul2012.html>.
>>>
>>>
>>>
>>> Leo
>>>
>>>  have recently made a number of changes to the particle tracing.  You
>>> can find a summary on page of 11 the Kitware Source July issue<http://www.kitware.com/media/thesource/jul2012.html>
>>> .
>>>
>>>
>>>
>>> On Mon, Nov 19, 2012 at 3:47 PM, Dan Lipsa <dan.r.lipsa at gmail.com>wrote:
>>>
>>>>
>>>>
>>>> ---------- Forwarded message ----------
>>>> From: Dan Lipsa <dan.r.lipsa at gmail.com>
>>>> Date: Mon, Nov 19, 2012 at 8:47 PM
>>>> Subject: Re: [Paraview] Particle tracer
>>>> To: Yuanxin Liu <leo.liu at kitware.com>
>>>>
>>>>
>>>> Yuanxin,
>>>> Thanks for your reply,
>>>>  When I press play, the particles seem to stay in the same place.
>>>>  However, they do change color as they are colored by velocity magnitude.
>>>> Maybe the velocity is very small and the particles don't move much - I
>>>> trace only 43 time steps. I will try to trace the particles in an region of
>>>> higher velocity tomorrow (is night here in UK). Do I need to apply another
>>>> filter to get a pathline?
>>>>
>>>> Thank you,
>>>> Dan
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On Mon, Nov 19, 2012 at 6:43 PM, Yuanxin Liu <leo.liu at kitware.com>wrote:
>>>>
>>>>> The particle tracer works with the animation time.  What happens when
>>>>> you press "play" in the animation control?
>>>>>
>>>>>
>>>>>
>>>>> On Mon, Nov 19, 2012 at 12:31 PM, Dan Lipsa <dan.r.lipsa at gmail.com>wrote:
>>>>>
>>>>>> Hi all,
>>>>>> I have found this thread after I tried unsuccessfully to trace
>>>>>> pathlines from a list of vti files using paraview 3.98.0-RC1-2-ge3fcf70
>>>>>> 64-bit on Linux.
>>>>>>
>>>>>> http://www.paraview.org/pipermail/paraview/2012-April/024587.html
>>>>>>
>>>>>> I execute the following steps:
>>>>>> 1. add the temporal, regular dataset (list of vti files)
>>>>>> 2. add a line source for seeds
>>>>>> 3. add a ParticleTracer filter with input my regular vector data and
>>>>>> seeds generated by the line.
>>>>>>
>>>>>> I only see the starting points, no tracing occurs.
>>>>>>
>>>>>> Any help would be greatly appreciated.
>>>>>>
>>>>>> Dan
>>>>>>
>>>>>>
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>>>>>
>>>>
>>>>
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>>
>
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