[Paraview] Particle tracer

[Burlen Loring]

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=15 
however 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 <mailto: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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