[Paraview] ParticlePathlines filter with vtk time series

[Biddiscombe, John A.]

Utkarsh, 

sorry to contradict you, but actually the cells are irrelevant here. If you throw in a MaskPoints filter, with the create vertices option on, set mask to 1, and one point per cell, you see the points animate.
When you stick in a pathline filter, as Michael pointed out, the option to display the original point vars is gone. They get lost. I experimented by adding a calculator filter which did nothing except create a new point array and hey-presto - the point vars re-appear.

I didn't look into the pathline code, but it's just possible, that when there is only one scalar array, a bug manifests itself and you can't interpolate arrays. when there is >1 array, it works.

Probably when I implemented it originally, I assumed that one array was Ids and somehow mucked it up.

For a quick fix, throw a calculator filter in which just copied the TPART array with a new name to generate 2 arrays, then try again.

sorry also beacuse I had a look at this over the weekend and forgot completely to post my findings.

JB

-----Original Message-----
From: paraview-bounces at paraview.org [mailto:paraview-bounces at paraview.org] On Behalf Of Utkarsh Ayachit
Sent: 08 November 2010 15:53
To: Michael Müller
Cc: paraview at paraview.org
Subject: Re: [Paraview] ParticlePathlines filter with vtk time series

Michael,

Looks like your vtk file doesn't define any cell, just points. That's
the problem. Several filters iterate over points in cells and when
cells are missing may totally skip points (which why you see no
rendering when you load the vtk file). You need to define a vertices
cell for your polydata in the vtk file. Save out the
csv->table-to-points data as a ASCII vtk file to see how to define the
cells.

Utkarsh

On Sun, Nov 7, 2010 at 5:04 AM, Michael Müller
<Michael.Mueller at ifk.uni-stuttgart.de> wrote:
> Sorry, forgot to append the files...
>
> Von: Michael Müller
> Gesendet: Sonntag, 7. November 2010 11:00
> An: Utkarsh Ayachit
> Cc: paraview at paraview.org
> Betreff: AW: [Paraview] ParticlePathlines filter with vtk time series
>
> Utkarsh,
>
> here you can see my sample files (vtk & csv) each consisting of 4 time steps. The csv series works as expected, the vtk series doesn't...
>
> Thanks.
>
> Michael
>
> ________________________________________
> Von: Utkarsh Ayachit [utkarsh.ayachit at kitware.com]
> Gesendet: Freitag, 5. November 2010 21:20
> An: Michael Müller
> Cc: paraview at paraview.org
> Betreff: Re: [Paraview] ParticlePathlines filter with vtk time series
>
> Can you possible share the vtk file you  are having issue with? You
> can send it to me offline, if you cannot post it to the list.
>
> Thanks
> Utkarsh
>
> On Fri, Nov 5, 2010 at 6:36 AM, Michael Müller
> <Michael.Mueller at ifk.uni-stuttgart.de> wrote:
>> Hi,
>>
>> I got a question regarding the 'ParticlePathlines'-filter. What I want to do is, load particle time series follow its trajectories and colour the pathlines according to a certain variable...
>> If I load my time series of vtk-files (see below), apply the 'ParticlePathlines'-filter and skip through the time steps I can follow the particle trajectories. I may also choose the variable for the particles itself (TPART, see below). But for the pathlines the only options are 'Solid Color' and 'TrailId', so it's not possible to color the tracks acc. to for example TPART... Why that?
>> - Is sth wrong with my file?
>> - Do I need another paraview filter?
>>
>> I am currently using the downloaded version 3.8.1.
>>
>> And by the way, it is working properly using simple csv file series: after loading the series, applying TableToPoints & ParticlePathlines filter I may choose TPART for coloring the pathlines...
>>
>> Any hints on that?
>>
>> Thanks.
>> Michael
>>
>>
>> sample files:
>> ... vtk:
>> # vtk DataFile Version 3.0
>> Particles: at time step 1
>> ASCII
>> DATASET POLYDATA
>> POINTS      4 float
>>   1.00000e+00 1.00000e+00 0.00000e+00
>>   1.00000e+00 2.00000e+00 0.00000e+00
>>   2.00000e+00 2.00000e+00 0.00000e+00
>>   2.00000e+00 1.00000e+00 0.00000e+00
>> POINT_DATA  4
>> SCALARS TPART float 1
>> LOOKUP_TABLE DEFAULT
>>   3.00000e+02
>>   3.00000e+02
>>   3.00000e+02
>>   3.00000e+02
>>
>> ... csv:
>>   X,         Y,         Z,       TPART
>>  1.000,     1.000,     0.000,     300
>>  1.000,     2.000,     0.000,     300
>>  2.000,     2.000,     0.000,     300
>>  2.000,     1.000,     0.000,     300
>>
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