Line data    Source code

       1             : // The libMesh Finite Element Library.
       2             : // Copyright (C) 2002-2025 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
       3             : 
       4             : // This library is free software; you can redistribute it and/or
       5             : // modify it under the terms of the GNU Lesser General Public
       6             : // License as published by the Free Software Foundation; either
       7             : // version 2.1 of the License, or (at your option) any later version.
       8             : 
       9             : // This library is distributed in the hope that it will be useful,
      10             : // but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12             : // Lesser General Public License for more details.
      13             : 
      14             : // You should have received a copy of the GNU Lesser General Public
      15             : // License along with this library; if not, write to the Free Software
      16             : // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
      17             : 
      18             : // Local Includes
      19             : #include "libmesh/libmesh_config.h"
      20             : 
      21             : #ifdef LIBMESH_ENABLE_PERIODIC
      22             : 
      23             : #include "libmesh/periodic_boundaries.h"
      24             : #include "libmesh/boundary_info.h"
      25             : #include "libmesh/elem.h"
      26             : #include "libmesh/mesh_base.h"
      27             : #include "libmesh/periodic_boundary.h"
      28             : #include "libmesh/point_locator_base.h"
      29             : #include "libmesh/remote_elem.h"
      30             : 
      31             : namespace libMesh
      32             : {
      33             : 
      34      223807 : PeriodicBoundaries::~PeriodicBoundaries() = default;
      35             : 
      36             : 
      37             : 
      38         513 : PeriodicBoundaryBase * PeriodicBoundaries::boundary(boundary_id_type id)
      39             : {
      40          22 :   iterator i = this->find(id);
      41         513 :   if (i == this->end())
      42          22 :     return nullptr;
      43           0 :   return i->second.get();
      44             : }
      45             : 
      46             : 
      47             : 
      48      275482 : const PeriodicBoundaryBase * PeriodicBoundaries::boundary(boundary_id_type id) const
      49             : {
      50       72570 :   const_iterator i = this->find(id);
      51      275482 :   if (i == this->end())
      52         812 :     return nullptr;
      53      266452 :   return i->second.get();
      54             : }
      55             : 
      56             : 
      57             : 
      58             : 
      59       61148 : const Elem * PeriodicBoundaries::neighbor(boundary_id_type boundary_id,
      60             :                                           const PointLocatorBase & point_locator,
      61             :                                           const Elem * e,
      62             :                                           unsigned int side,
      63             :                                           unsigned int * neigh_side) const
      64             : {
      65       61148 :   std::unique_ptr<const Elem> neigh_side_proxy;
      66             : 
      67             :   // Find a point on that side (and only that side)
      68       61148 :   Point p = e->build_side_ptr(side)->vertex_average();
      69             : 
      70       61148 :   const PeriodicBoundaryBase * b = this->boundary(boundary_id);
      71       25364 :   libmesh_assert (b);
      72       61148 :   p = b->get_corresponding_pos(p);
      73             : 
      74       50728 :   std::set<const Elem *> candidate_elements;
      75       61148 :   point_locator.operator()(p, candidate_elements);
      76             : 
      77             :   // We might have found multiple elements, e.g. if two distinct periodic
      78             :   // boundaries are overlapping (see systems_of_equations_ex9, for example).
      79             :   // As a result, we need to search for the element that has boundary_id.
      80       61148 :   const MeshBase & mesh = point_locator.get_mesh();
      81       63061 :   for(const Elem * elem_it : candidate_elements)
      82             :     {
      83             :       std::vector<unsigned int> neigh_sides =
      84       63061 :         mesh.get_boundary_info().sides_with_boundary_id(elem_it, b->pairedboundary);
      85             : 
      86       63187 :       for (auto ns : neigh_sides)
      87             :         {
      88       61274 :           if (neigh_side)
      89             :             {
      90       20190 :               elem_it->build_side_ptr(neigh_side_proxy, ns);
      91       20190 :               if (neigh_side_proxy->contains_point(p))
      92             :                 {
      93       20064 :                   *neigh_side = ns;
      94       39740 :                   return elem_it;
      95             :                 }
      96             :             }
      97             :           else
      98             :             // checking contains_point is too expensive if we don't
      99             :             // definitely need it to find neigh_side
     100       41084 :             return elem_it;
     101             :         }
     102             :     }
     103             : 
     104             :   // If we should have found a periodic neighbor but didn't then
     105             :   // either we're on a ghosted element with a remote periodic neighbor
     106             :   // or we're on a mesh with an inconsistent periodic boundary.
     107           0 :   libmesh_error_msg_if(mesh.is_serial() ||
     108             :                        (e->processor_id() == mesh.processor_id()),
     109             :                        "Periodic boundary neighbor not found");
     110             : 
     111           0 :   if (neigh_side)
     112           0 :     *neigh_side = libMesh::invalid_uint;
     113           0 :   return remote_elem;
     114       16848 : }
     115             : 
     116             : } // namespace libMesh
     117             : 
     118             : 
     119             : 
     120             : 
     121             : 
     122             : #endif // LIBMESH_ENABLE_PERIODIC