Here is an answer from Cory last summer, off list, to one of my customers:
On Tue, Jul 11, 2017 at 2:50 PM, Cory Quammen <cory.quam...@kitware.com> wrote: > Dear <redacted>, > > I think the Force Time filter will come in handy here for this use > case. It can be used to "freeze" a dataset at a certain timestep. > > * Load can.ex2 > * Add a Force Time filter. Set the timestep to the one whose > displacement you want to be zero. The output of this filter is the > can.ex2 dataset "frozen" at the chosen timestep. It will not change as > you advance through time. > * Select both can.ex2 and the ForceTime1 sources in the Pipeline > Browser. Note that the original can.ex2 source will update as the > timestep changes, but the ForceTime1 source will not change. > * Add a Python Calculator filter to subtract the displacement in the > "frozen" data set from the current timestep in can.ex2. Set the > expression to > > inputs[0].PointData['DISPL'] - inputs[1].PointData['DISPL'] > > The order of inputs into the Python Calculator is not well defined, so > you may need to swap the indices in inputs[0] and inputs[1] to get the > correct sign on the result, but this should work. > * Finally, add a Plot Selection over Time filter. This filter will run > over all time steps, subtracting the data from the current timestep > from the data in the "frozen" timestep produced by the Force Time > filter, and plot the result in a graph. The first timestep should have > a value of 0. > > Please let me know if this approach isn't clear or doesn't work. > > Best regards, > Cory > > > On Tue, Jul 11, 2017 at 1:27 PM, Scott, W Alan <wasc...@sandia.gov> wrote: >> Morning team, >> >> <redacted>, one of my customers, has been working on an issue for a while. >> Ken and Andy have replied, but I don’t think we understood, or >> answered, <redacted> problem. Here is what he is trying to do, using >> can.exo as an example. >> >> >> >> I assume this will require the Programmable Filter – if so, mind >> voodooing up the source? >> >> >> >> I believe that <redacted> basically wants to be able to subtract two >> timesteps from each other. I thought I had an example from a >> previous thread, but can’t find it. >> >> >> >> Thanks! >> >> >> >> Alan >> >> >> >> >> >> > -----Original Message----- > From: ParaView [mailto:paraview-boun...@paraview.org] On Behalf Of > Carolin Helbig > Sent: Wednesday, January 10, 2018 2:57 AM > To: paraview@paraview.org > Subject: [EXTERNAL] [Paraview] ParaView - Variables and different Time > Steps > > Dear ParaView team, > > I read a post at the ParaView website concerning variables and different time > steps (see https://public.kitware.com/pipermail/paraview/2014- > May/031054.html). I have a similar problem and I want to access values from > different time steps using the programmable filter with multiple inputs. I > unfortunately have no idea how to access other time steps using the > programmable filter. Could you give me some advice or a hint where I can > find detailed information about that issue? I would be very happy if you > could help me. > > Best regards, > Carolin. > > -- > Dr. Carolin Helbig > > Department Umweltinformatik > Helmholtz-Zentrum für Umweltforschung GmbH - UFZ Permoserstraße 15 I > 04318 Leipzig > Tel.: +49 341 235 - 1032 > Email: carolin.hel...@ufz.de > WWW: http://www.ufz.de > https://www.ufz.de/index.php?en=31616 > > > > Sitz der Gesellschaft > Registergericht: Amtsgericht Leipzig > Handelsregister Nr.: B 4703 > Vorsitzender des Aufsichtsrats: MinDirig Wilfried Kraus Wissenschaftlicher > Geschäftsführer: Prof. Dr. Dr. h.c. Georg Teutsch > Administrative Geschäftsführerin: Prof. Dr. Heike Graßmann > > _______________________________________________ > 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 > > Search the list archives at: http://markmail.org/search/?q=ParaView > > Follow this link to subscribe/unsubscribe: > https://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 Search the list archives at: http://markmail.org/search/?q=ParaView Follow this link to subscribe/unsubscribe: https://paraview.org/mailman/listinfo/paraview
