[Paraview] display pressure on box

[Berk Geveci]

> E.g. I want to visualize the pressure data on a cubic
> obstacle in a channel flow. Which filter do I have to use?
> My idea was to create a box at the obstacle position and
> 'map' the data on it, but I have no idea how!?

You need to either cut or clip the dataset with a box. Unfortunately,
the cut filter (as it is in paraview) does not support box. Try
clipping with a box or cutting with a few planes.