[vtkusers] Update actor in realtime

[Matias Montroull]

Hi,

I have a set of points that I render in the screen and I also have a
function that modifies the position of those points in a for loop. Here's
my question:

Can I update the actor or the the render as the points move in each loop to
show where the points are after each iteration?

Thanks!

Matias.
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