Thanks, David! I have loaded in my local Paraview (v. 5.7.0) and I don't get any issues. You are using v. 5.9.0; so my best guess would be that Paraview has permuted the support points between the releases, what would be really annoying. Maybe you could check https://github.com/dealii/dealii/blob/e4171ed1729d09c842a6ee77c08bd7e669c5fd1c/source/base/data_out_base.cc#L774-L888 and compare it to the current implementation of VTK.
Peter On Wednesday, 24 February 2021 at 14:50:29 UTC+1 daschn...@googlemail.com wrote: > Hi Peter, > > >David, could you try out the following PR: > https://github.com/dealii/dealii/pull/11784 > > I tried it and the PR doesn't fix it for me. > > > Not sure if the issue there is related. If not, could you post a vtk/vtu > file and I'll read it with my Paraview version. > > Very good idea. I attached an affected file. > Can you reproduce the issue with your paraView version? > > Regards, > David > > Am Di., 23. Feb. 2021 um 16:08 Uhr schrieb peter rum <peterr...@gmail.com > >: > >> David, could you try out the following PR: >> https://github.com/dealii/dealii/pull/11784 >> Not sure if the issue there is related. If not, could you post a vtk/vtu >> file and I'll read it with my Paraview version. >> >> Peter >> >> On Tuesday, 23 February 2021 at 09:07:57 UTC+1 daschn...@googlemail.com >> wrote: >> >>> Hi Wolfgang, >>> >>> > I have to admit that I don't know how to address this because I don't >>> know nor >>> > use Paraview. As mentioned before, it would be useful to obtain the >>> smallest >>> > possible testcase that reproduces the problem -- minimal number of >>> processors, >>> > minimal number of cells. >>> >>> I already tried to answer this question above since Alexander asked the >>> same question (not sure why his message has been deleted): >>> >>> > Yes, I can reproduce it on 2 procs and I can also simplify the mesh to >>> a size of four cells on a rectangle. The problem vanishes if I select >>> linear shape functions or zero nonlinear subdivisions in paraView (which is >>> probably the same). >>> >>> [image: coarse_mesh_distorted.png] >>> >>> > If I increase the nonlinear subdivision setting in paraVIew to four >>> (as opposed to the default one), it looks as follows: >>> >>> [image: coarse_mesh_four_subd.png] >>> >>> >>> Does it help? >>> Regards, >>> David >>> >>> Wolfgang Bangerth schrieb am Montag, 22. Februar 2021 um 20:10:05 UTC+1: >>> >>>> On 2/18/21 6:39 AM, 'David' via deal.II User Group wrote: >>>> > >>>> > the problem here is independent of any data set. So, you can also see >>>> it in >>>> > paraView in the 'solid color' block. It seems to be an artificial >>>> curvature >>>> > within the element. >>>> > To my best knowledge it is not required to update any geometry >>>> related data. >>>> >>>> I have to admit that I don't know how to address this because I don't >>>> know nor >>>> use Paraview. As mentioned before, it would be useful to obtain the >>>> smallest >>>> possible testcase that reproduces the problem -- minimal number of >>>> processors, >>>> minimal number of cells. >>>> >>>> Best >>>> Wolfgang >>>> >>>> -- >>>> ------------------------------------------------------------------------ >>>> >>>> Wolfgang Bangerth email: bang...@colostate.edu >>>> www: http://www.math.colostate.edu/~bangerth/ >>>> >>>> -- >> The deal.II project is located at http://www.dealii.org/ >> For mailing list/forum options, see >> https://groups.google.com/d/forum/dealii?hl=en >> --- >> > You received this message because you are subscribed to a topic in the >> Google Groups "deal.II User Group" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/dealii/O059tF8sy3o/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> dealii+un...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/dealii/1d13c760-0972-450f-a553-b26f2b2fb7den%40googlegroups.com >> >> <https://groups.google.com/d/msgid/dealii/1d13c760-0972-450f-a553-b26f2b2fb7den%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/caacab7a-aa2d-4aa0-ba35-97eb2609b244n%40googlegroups.com.
