Dear all, <div><br></div><div>I am trying to compute vorticity from separated velocity vectors, but pre-installed filter of paraview seems to require 3-components vector as an input. Then, I have tried to use the "Python Calculator" filter to construct it. I put "hstack([VelocityX, VelocityY, VelocityZ])" into the "Expression" field following the wiki. However, it created just a copy of VelocityX instead of 3-components vector. How can I construct 3-components array form separated velocity vectors? </div>
<div><br></div><div>I have also tried to use the "Programmable Filter". But, it has been really difficult for me and I could not just extract the vector from the input. The vectors live in vtkUnstructuredGrid in a vtkMultiBlockDataSet and there are no function to extract Point Data form it. </div>
<div><br></div><div>Regards, </div><div><br></div><div>Makoto</div><div><br></div>