Re: [deal.II] determine global dof index of a point
There is also DoFTools::map_support_points_to_dofs, see https://www.dealii.org/current/doxygen/deal.II/namespaceDoFTools.html#a3540ceb577e65414bde1b6b14808da2c Best, Daniel On Thu, May 18, 2023 at 11:15 AM Wolfgang Bangerth wrote: > On 5/17/23 12:00, Mathieu wrote: > > > > I apologize for my simple question: > > Given a point, which is also a vertex (support point of FE_Q element), > in real > > coordinates, is there a function that allows me to query the global dof > index > > associated with that support point? > > > > I know all the cells at which these support point lives. > > One could then loop over the vertices of anyone of these cells, and call > > cell->vertex_dof_index(vertex,...) > > if vertex is the one that matches the support point. > > > > But I was wondering if there is a direct way to get the dof index of a > vertex > > based on the coordinates in real space. > > You can use DoFTools::map_dofs_to_support_points(). This gives you the map > "in > the wrong direction", but would probably still be useful for your case. > > Best > W. > > -- > > Wolfgang Bangerth email: bange...@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 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/78768f0a-b5a4-b689-adeb-e6a95e6da1a8%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 dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/CAOYDWbLt1EKRRu-H6T3Sxk2fYm5UZYquuBc_Mb_QuEJ_SvYw%2Bg%40mail.gmail.com.
Re: [deal.II] determine global dof index of a point
On 5/17/23 12:00, Mathieu wrote: I apologize for my simple question: Given a point, which is also a vertex (support point of FE_Q element), in real coordinates, is there a function that allows me to query the global dof index associated with that support point? I know all the cells at which these support point lives. One could then loop over the vertices of anyone of these cells, and call cell->vertex_dof_index(vertex,...) if vertex is the one that matches the support point. But I was wondering if there is a direct way to get the dof index of a vertex based on the coordinates in real space. You can use DoFTools::map_dofs_to_support_points(). This gives you the map "in the wrong direction", but would probably still be useful for your case. Best W. -- Wolfgang Bangerth email: bange...@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 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/78768f0a-b5a4-b689-adeb-e6a95e6da1a8%40colostate.edu.
[deal.II] determine global dof index of a point
Hello everyone, I apologize for my simple question: Given a point, which is also a vertex (support point of FE_Q element), in real coordinates, is there a function that allows me to query the global dof index associated with that support point? I know all the cells at which these support point lives. One could then loop over the vertices of anyone of these cells, and call cell->vertex_dof_index(vertex,...) if vertex is the one that matches the support point. But I was wondering if there is a direct way to get the dof index of a vertex based on the coordinates in real space. Thank you Math -- 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/798c8e5f-57d5-4636-931f-12d66d462631n%40googlegroups.com.
