[Paraview] [EXTERNAL] Re: visualise particle paths

Thu May 1 13:49:38 EDT 2014

It sounds like the particles you are extracting are different from one time step to the next. As you have probably guessed already, the Temporal Particles To Pathlines filter assumes that the particles are consistent from one time step to the next. If the number or order of particles changes, then the filter will draw lines between different points.

You need to make sure the particle pathlines filter can uniquely identify the particles from one step to the next. Try first running the Generate Ids filter before doing the extraction. Then in the properties for the particle pathlines filters, select the variable Ids for the Id Channel Array. That might do the trick.

-Ken

From: Timothy Charles Fagan <tcfag1 at student.monash.edu<mailto:tcfag1 at student.monash.edu>>
Date: Thursday, May 1, 2014 8:41 AM
To: ParaView Mailing List <paraview at paraview.org<mailto:paraview at paraview.org>>
Subject: Re: [Paraview] [EXTERNAL] Re: visualise particle paths

Thanks Ken! that is exactly what I'm looking for.

I've been playing around with it and it works very well when I apply the filter directly to my data set. But when I try to extract a region and then apply it, the particles are jumping around causing the pathlines to be incoherent. I guess that it's reading the wrong particle at the next step. I've been using the threshold and extract selection filters to get to the region I need. Is there a better way to look at a section of particles without this happening? The input data doesn't have a particle key/ID or anything, which may be some of the problem.

cheers

On 30 April 2014 02:46, Moreland, Kenneth <kmorel at sandia.gov<mailto:kmorel at sandia.gov>> wrote:
Try the Temporal Particles To Pathlines filter.

-Ken

From: Timothy Charles Fagan <tcfag1 at student.monash.edu<mailto:tcfag1 at student.monash.edu>>
Date: Tuesday, April 29, 2014 8:59 AM
To: ParaView Mailing List <paraview at paraview.org<mailto:paraview at paraview.org>>
Subject: [EXTERNAL] Re: [Paraview] visualise particle paths

Yes animating them is no problem. What I would like to see is the path that the particles take over time, visualized as a pathline. Visualizing the location of a particle at one point in time is not what I'm after, which is what I see with the animation...

On 30 April 2014 00:12, Berk Geveci <berk.geveci at kitware.com<mailto:berk.geveci at kitware.com>> wrote:
I am assuming you have a series of these files? Did you try naming them in a way that ParaView recognizes as file series and then animating them?

See this:

http://www.paraview.org/Wiki/ParaView/Users_Guide/Loading_Data

-berk

On Tue, Apr 29, 2014 at 8:43 AM, Timothy Charles Fagan <tcfag1 at student.monash.edu<mailto:tcfag1 at student.monash.edu>> wrote:
Dear Paraview Community,

I am trying to visualise pathlines for my particle data. I have a vtk file with point coordinates as input.

As an example this is one input file for just three particles. With a collection of these, is it possible to view the movement of these particles over time?

# vtk DataFile Version 4.2
Particle data from file output.0 at time 0 ms
ASCII
DATASET POLYDATA
POINTS 3 double
0 0 1
2 0 0
1 1 2

There's a few temporal filters, and I've had a play with them but they currently produce errors for me, resulting in nothing shown or paraview crashing. I have looked through the archives, and it seems there might have been a way to do this in an old version, but not right now?

Thanks
Tim

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