Hi all, I've been looking at <http://www.paraview.org/Wiki/Python_Programmable_Filter> to create a programmable filter, but I'm a bit lost as to whether or not I need GetPolyData, CopyAttributes,...
Essentially, I have an unstructured grid in an ExodusII file (like the attached file actually) with point data "psi" in it that has two components (X,Y). I can plot psi:X, psi:Y, and psi:magnitude alright with the default GUI options, but what I would really like to have plotted is X^2+Y^2 (no sqrt()) and something along the lines of arctan(Y/X). Is there simple code somewhere some that takes array data off of an unstructured grid, does something with it and returns the extra array from the filter? Cheers, Nico
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