On 02/19/2018 05:37 AM, luca.heltai wrote:
After you have created your coarse mesh, you could 
GridTools::flatten_triangulation it. This will create a brand new coarse 
triangulation, containing only all your active cells.


Alternatively, between the call to GridRefinement::refine_...() and Triangulation::execute_coarsening_and_refinement(), you can go over all cells and call
  if (cell->level() == 1
      &&
      cell->coarsen_flag_set())
  cell->clear_coarsen_flag()

This makes sure that once refined cells will never be coarsened again.

Best
 W.

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

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