What version of ParaView are you using? I was able to use "hstack([VelocityX, VelocityY, VelocityZ])" with the Python Calculator filter in v3.14.1. Alternatively you could try the Calculator filter with "iHat*VelocityX+jHat*VelocityY+kHat*VelocityZ".
Andy On Wed, Oct 24, 2012 at 12:17 PM, 中田拓馬 <uiro...@gmail.com> wrote: > Dear all, > > 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? > > 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. > > Regards, > > Makoto > > > _______________________________________________ > Powered by www.kitware.com > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Please keep messages on-topic and check the ParaView Wiki at: > http://paraview.org/Wiki/ParaView > > Follow this link to subscribe/unsubscribe: > http://www.paraview.org/mailman/listinfo/paraview > >
_______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview