hp_singular.C

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// The libMesh Finite Element Library.
// Copyright (C) 2002-2025 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner

// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.

// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

// C++ includes

// Local Includes
#include "libmesh/elem.h"
#include "libmesh/hp_singular.h"
#include "libmesh/libmesh_logging.h"
#include "libmesh/mesh_base.h"
#include "libmesh/system.h"

#ifdef LIBMESH_ENABLE_AMR

namespace libMesh
{

//-----------------------------------------------------------------
// HPSingularity implementations


void HPSingularity::select_refinement (System & system)
{
  LOG_SCOPE("select_refinement()", "HPSingularity");

  // The current mesh
  MeshBase & mesh = system.get_mesh();

  for (auto & elem : mesh.active_element_ptr_range())
    {
      // We're only checking elements that are already flagged for h
      // refinement
      if (elem->refinement_flag() != Elem::REFINE)
        continue;

      elem->set_p_refinement_flag(Elem::REFINE);
      elem->set_refinement_flag(Elem::DO_NOTHING);

      for (const auto & pt : singular_points)
        if (elem->contains_point(pt))
          {
            elem->set_p_refinement_flag(Elem::DO_NOTHING);
            elem->set_refinement_flag(Elem::REFINE);
            break;
          }
    }
}

} // namespace libMesh

#endif // #ifdef LIBMESH_ENABLE_AMR