Sorry, I hit send too soon. It might be possible to use a PostProcessorScalar to extract the manifold ID from the cell that the post-processor is actively working on, and return that value as the outputted “computed_quantities". Then you don’t need to worry about any of the iterating yourself. But I’m not quite sure if you can get it to colour each face as a single manifold ID (as it might interpolate the values between adjacent faces). That said, I would be surprised if this were not somehow possible to do, since we allow the cell material ID to be output as a cell constant value.
Maybe someone else on the mailing list knows more about this class, and could provide more hints? > On 10 Apr 2020, at 00:45, Jean-Paul Pelteret <[email protected]> wrote: > > Hi Bruno, > > I haven’t used this class before, and admittedly haven’t gone digging too > deep for examples of where its used. But here are a few examples (one > tutorial and a couple from the test suite) that may be able to guide you in > the right direction. At first glance, its seems to work more-or-less like the > normal DataOut class. > https://www.dealii.org/developer/doxygen/deal.II/step_51.html > <https://www.dealii.org/developer/doxygen/deal.II/step_51.html> > https://github.com/dealii/dealii/blob/master/tests/data_out/data_out_faces_01.cc > > <https://github.com/dealii/dealii/blob/master/tests/data_out/data_out_faces_01.cc> > https://github.com/dealii/dealii/blob/master/tests/data_out/data_out_faces_postprocessor_scalar_02.cc > > <https://github.com/dealii/dealii/blob/master/tests/data_out/data_out_faces_postprocessor_scalar_02.cc> > > I hope that this helps you a little. > Best, > Jean-Paul > >> On 09 Apr 2020, at 03:39, Bruno Blais <[email protected] >> <mailto:[email protected]>> wrote: >> >> Dear all, >> I hope you are well. >> I am currently working extensively with adaptive mesh refinement and I feel >> the need to output the 2D boundary surface of my 3D mesh (thus a dim=2, >> spacedim=3 type of problem) >> I have realized there is an amazing Data out object that exists >> DataOutFaces<dim> which does exactly what I need. >> I have figured out how to attach data to it and how to write parallel vtu >> files with it. However, I would like to add a data to this DataOutFace that >> would give out the manifold number (or the boundary id) of my boundary >> condition. However, since this DataOutFace only contains face of the >> surface, I am really unsure how to iterate on this structure. >> I saw that there is a first_face() and next_face() function that should >> allow me to iterate over the face. However, this structure appears to be an >> std::pair and from this point I am confused as to how to use it. >> Could somebody point me in the right direction? I have looked online, but it >> seems this class is not used extensively. >> >> Thank you very much for your help, >> Bruno >> >> >> -- >> The deal.II project is located at http://www.dealii.org/ >> <http://www.dealii.org/> >> For mailing list/forum options, see >> https://groups.google.com/d/forum/dealii?hl=en >> <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 [email protected] >> <mailto:[email protected]>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/dealii/2effdbf6-a7e7-45f7-89cb-528865285460%40googlegroups.com >> >> <https://groups.google.com/d/msgid/dealii/2effdbf6-a7e7-45f7-89cb-528865285460%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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/13CA5B28-7FCD-4B51-93D6-9B07AE35B4DF%40gmail.com.
