[Paraview] Particle tracer
Mohamad M. Nasr-Azadani
mmnasr at gmail.com
Thu Apr 19 16:38:56 EDT 2012
Thanks guys for your help.
Looking forward to hearing good news.
Cheers,
Mohamad
On Thu, Apr 19, 2012 at 1:29 PM, Berk Geveci <berk.geveci at kitware.com>wrote:
> Leo and I will have an answer for you guys soon. FYI we just started
> working on the particle tracker with the purpose of cleaning it up as well
> as making its interface easier to use.
>
> Best,
> -berk
>
>
> On Wed, Apr 18, 2012 at 4:08 PM, Mohamad M. Nasr-Azadani <mmnasr at gmail.com
> > wrote:
>
>> Hi Burlen,
>>
>> I am hoping that Utkarsh could help figure things out.
>> If you elaborate more on what you do and what happens, I could at least
>> share my experience.
>> I use *.vtr type files to generate particle trace and pathlines.
>> The problem I have/had is that as soon as I apply any Temporal Filter to
>> the *.vtr file series, it either gives me error message or crashes.
>> I was very very very lucky that I found out that for the same dataset, if
>> I use *.vtu format, no problems or crashing occurred. So, for now, I just
>> used a Clip filter to extract my data into a *.vtu format and rewrite them,
>> re-read them and do the ParticleTrace and ParticlePathlines.
>> That was my experience.
>>
>> Let me know if I could be of any help.
>> Good luck,
>> Mohamad
>>
>>
>>
>>
>> On Wed, Apr 18, 2012 at 11:15 AM, Burlen Loring <bloring at lbl.gov> wrote:
>>
>>> **
>>> Hi Mohamad,
>>>
>>> I've been quietly following this thread in hopes that your interest in
>>> particle tracing will spark a response from the developers. I was unable to
>>> generate pathlines in image data in vti format I beleive I was using 3.10.0
>>> at the time. It was not clear to me if there was a bug or if I had the
>>> pipeline built incorrectly out of my own ignorance on how this works in PV.
>>> I posted a question with test data hoping for some advise,
>>> http://paraview.markmail.org/message/ek67niwr7xagaajz?q=burlen+order:date-backward&page=15however I did not receive any reply.
>>>
>>> Burlen
>>>
>>>
>>> On 04/07/2012 05:28 AM, Mohamad M. Nasr-Azadani wrote:
>>>
>>> I apologize for some mistakes.
>>> The Powerpoint I was refering to can be found here.
>>>
>>> *paraview*.org/Wiki/images/2/20/IEEE08_*Time-In-ParaView*.ppt
>>>
>>>
>>> Best,
>>> Mohamad
>>>
>>> On Sat, Apr 7, 2012 at 5:22 AM, Mohamad M. Nasr-Azadani <
>>> mmnasr at gmail.com> wrote:
>>>
>>>> Hi all,
>>>>
>>>> This is what I doing:
>>>>
>>>> 1- Load the PVD file (which holds the real time information
>>>> associated with each *.vtr file)
>>>>
>>>> <?xml version="1.0"?>
>>>> <VTKFile type="Collection" version="0.1" byte_order="LittleEndian"
>>>> compressor="vtkZLibDataCompressor">
>>>> <Collection>
>>>> <DataSet timestep="0.0" group="" part="0" file="vel_vec_0.vtr"/>
>>>> <DataSet timestep="0.2" group="" part="0" file="vel_vec_1.vtr"/>
>>>> <DataSet timestep="0.4" group="" part="0" file="vel_vec_2.vtr"/>
>>>> <DataSet timestep="0.6" group="" part="0" file="vel_vec_3.vtr"/>
>>>> <DataSet timestep="0.8" group="" part="0" file="vel_vec_4.vtr"/>
>>>> <DataSet timestep="1.0" group="" part="0" file="vel_vec_5.vtr"/>
>>>> <DataSet timestep="1.2" group="" part="0" file="vel_vec_6.vtr"/>
>>>> <DataSet timestep="1.4" group="" part="0" file="vel_vec_7.vtr"/>
>>>> <DataSet timestep="1.6" group="" part="0" file="vel_vec_8.vtr"/>
>>>> <DataSet timestep="1.8" group="" part="0" file="vel_vec_9.vtr"/>
>>>> <DataSet timestep="2.0" group="" part="0" file="vel_vec_10.vtr"/>
>>>> </Collection>
>>>> </VTKFile>
>>>>
>>>>
>>>> 2- Click on my data and create a "Temporal Cache" with "Cache
>>>> Size=2".
>>>>
>>>> 3- From "Sources", I create a "Line".
>>>>
>>>> 4- Click on TemporalCache1 and create a ParticleTracer.
>>>> When the menu pops up, I choose
>>>> a) Input: TemporalCache1
>>>> b) Source: Line1
>>>> Right after I click Ok, this is the message I get (note that this
>>>> message is shown even before giving me the chance to change any flags on
>>>> the "Properties" section related to the "ParticleTracer1".
>>>>
>>>> /home/utkarsh/Kitware/superbuild/paraview/src/paraview/VTK/Filtering/vtkStreamingDemandDrivenPipeline.cxx,
>>>> line 934
>>>>
>>>> vtkPVPostFilterExecutive (0x4db4870): No maximum number of pieces has
>>>> been set in the information for output port 0 on algorithm
>>>> vtkPVPostFilter(0x4777fd0).
>>>>
>>>>
>>>> Luckily, Paraview does not crash and I can continue.
>>>> After doing some research, I am guessing that this has something to do
>>>> with the time conflicts (Pipeline fed into the filter and the animation
>>>> viewer time).
>>>>
>>>> *Observation:* Right after I create the ParticleTracer and receive
>>>> the error message, the time shown in the animation viewer is increased from
>>>> "0.0" to "0.2". Why?
>>>>
>>>> 5- Recommended by the powerpoint, I set
>>>> a) Time Step: True (1)
>>>> b) Ignore Pipeline Time: True (1)
>>>>
>>>>
>>>> 6- Now, I use "Animation View" as directed by the same powerpoint to
>>>> feed the time into the ParticleTracer1 filter.
>>>> a) Mode: Sequence
>>>> b) Create a keyframe for "ParticleTracer1". Double click on
>>>> the bar and set:
>>>> 1: time: 0.2, (interpolation ramp), value: 1
>>>> 2: time: 1.8, (), value: 9
>>>>
>>>> Note: I have varied all the combinations listed above to
>>>> include/exclude the last/first steps. No luck! Nothing really happening.
>>>>
>>>> 7- Play animation. Result: nothing happening? What is going on?
>>>>
>>>>
>>>> *Observation: Using Paraview 3.8, I could see the animation without
>>>> adjusting any parameters in the "Animation View" menu. Just the annoying
>>>> error message was shown. However, I could do the same thing with Paraview
>>>> 3.14, but it crashes after a few timesteps. *
>>>> *
>>>> *
>>>> Anybody could share some hints on how to go about this?
>>>>
>>>> Thanks,
>>>> Mohanad
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
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>>
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