[Paraview] Vorticity computation from separated velocity array
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
Re: [Paraview] Vorticity computation from separated velocity array
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 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
Re: [Paraview] Vorticity computation from separated velocity array
Makoto, Please see http://www.paraview.org/Wiki/Beginning_Filters#Calculator_filter and http://www.paraview.org/Wiki/Advanced_Tips_and_Tricks#Creating_vectors_from_2_or_3_scalars on how to combine velocity vector components into a 3-components vector. Karl 中田拓馬 wrote, On 24.10.2012 18:17: > 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
Re: [Paraview] Vorticity computation from separated velocity array
Karl, Thank you very much. The links really help me. Makoto 2012/10/25 Karl König > Makoto, > > Please see > http://www.paraview.org/Wiki/Beginning_Filters#Calculator_filter and > > http://www.paraview.org/Wiki/Advanced_Tips_and_Tricks#Creating_vectors_from_2_or_3_scalars > on how to combine velocity vector components into a 3-components vector. > > Karl > > > 中田拓馬 wrote, On 24.10.2012 18:17: > > 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
Re: [Paraview] Vorticity computation from separated velocity array
Andy, Today, I have tried again on 3.12.0. I don't know why but today both of the methods you mentioned work. Thank you. Makoto 2012/10/25 Andy Bauer > 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 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
