To add to what Wolfgang has already said, there’s this entry in our FAQ on this topic (well, the reverse mapping from vertex to DoF): https://github.com/dealii/dealii/wiki/Frequently-Asked-Questions#how-do-i-get-the-degree-of-freedom-indices-at-vertices <https://github.com/dealii/dealii/wiki/Frequently-Asked-Questions#how-do-i-get-the-degree-of-freedom-indices-at-vertices>
> On 16. Jul 2021, at 00:30, Wolfgang Bangerth <[email protected]> wrote: > > On 7/15/21 3:09 PM, Kaushik Das wrote: >> Is there a way to know which dof_index is located at which vertex. >> For example, I want to "map" a dof_index that I get from >> affine_constrains.get_constraint_entries(line); >> to a vertex index that are in the range of triangulation.begin_vertex() and >> triangulation.end_vertex(). > > Kaushik, > there is no such way in the library because, in general, DoFs need not be > located on vertices. That is only true for the Q1 element. > > But if you look at the implementation of the > DoFTools::map_dofs_to_support_points(), you can probably come up with a way > to get what you are looking, assuming you really are only using Q1 elements. > > Best > W. > > > -- > ------------------------------------------------------------------------ > Wolfgang Bangerth email: [email protected] > 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 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/b963d470-97f9-f79a-3ab8-4c31dbb70c94%40colostate.edu. -- 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/1AEDB596-AB45-45BD-B23A-847E077842EA%40gmail.com.
