[Paraview] Compute line between coordinates

[Dorian Pustina]

Hello everyone,

I am working on visualizing some brain imaging data. I have a bunch of
points in 3D space, which have two sets of coordinates: x1/y1/z1 and
x2/y2/z2. All I need is to show arrow glyphs starting from the first
coordinate and ending to the second coordinate. I currently import the data
as csv. I tried using the time series option, and I can loop through the
two time points, but can't find how to model a line or an arrow for each
point between the two times. I also tried to compute what is called
"velocity fields", that is a set of 3 scalar factors that if multiplied
with the original coordinates would yield the second coordinate (using
Calculator):
iHat*X snapped+jHat*Y snapped+kHat*Z snapped

Still, I don't get reasonable results. The problem looks trivial but I
couldn't find any solution online after hours of search. It is not even
clear to me what does the above formula do exactly.

Can someone help if this is possible?

Dorian
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