[Paraview] Track massive particles over time, particle ID is known

[timcfagan .]

I've tried to do the same thing Chenshu, this is how I ended up doing it:

open vtk particle file
generate ids (possibly apply it even if they already have ids)
extract entire dataset with particles through
threshold by generated ids for the particles you want
(This can be done multiple times to select multiple sets of points, then
append datasets to combine them to one)
Temporal particles to pathlines

Unfortunately I haven't found a better way to actually select the particles
other than through selecting them by particle ids. Just extracting a
selection doesn't work properly with the pathlines filter. But you can
extract a selection and view their ids in spreadsheet form. I was doing
this, writing it down and then applying the threshold. Also the generate
id's filter was applying them in layers in z, so you may find thresholding
for z>0 is easy as it might be one threshold in the id's. You just need to
find the right id number.

Maybe someone knows a better way though...

On Fri, Feb 6, 2015 at 1:17 AM, 303343023 <303343023 at qq.com> wrote:

> *Hi everyone*
> *   It troubles me for times. *
> *   I have a series of particles vtk files at different time step. And I
> want to track certain particles and extract them or color them with a
> uniform color. I tried to use "find data" and include the particle id with
> "is one of " option. However, it crashed due to overload of compute
> capacity. About 8 thousand particles is intended for tracking.*
> *   Furthermore, at the begining, the particles of interest located at the
> upper layer, coordinatesZ>0, for example. And I want to extract them from
> the whole.*
> *  Could any one help me? Thanks in advance!*
>
> Chenshu Hu
>
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