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.
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Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
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