[Paraview] delta between times

[Cory Quammen]

Alan,

One can use the Force Time filter to do this.

Load the csv files twice, and apply a Force Time filter to both. In
one Force Time filter, set the first time step (real time, not time
index) in the Forced Time property, and in the second set the Forced
Time to the next time step. Then select both Force Time filters in the
Pipeline Browser and add a Python Calculator. The expression you want
is

inputs[0].Points - inputs[1].Points

By default, the difference will be saved to a Point Data array with
the name in the "Array Name" property of the Python Calculator.

You might need to swap the 0 and 1 indices above based on how ParaView
orders the inputs into the Python Calculator. Unfortunately, that's
not well-defined right now.

Attached is a state file with an example using the can.ex2 file.

HTH,
Cory

On Thu, Nov 3, 2016 at 4:48 PM, Scott, W Alan <wascott at sandia.gov> wrote:
> From a user:
>
>
>
> If I have a time series with positions (It's a set of csv files, one time
> step per file, each file has the same set of points), is there a method of
> computing the delta position from the current time to the next time and
> using that as a glyph vector?
>
>
>
> Thanks,
>
> Alan
>
>
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-- 
Cory Quammen
Staff R&D Engineer
Kitware, Inc.
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