PlazaRefinementND.h

// Copyright (C) 2014 Chris Richardson
//
// This file is part of DOLFIN.
//
// DOLFIN 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 3 of the License, or
// (at your option) any later version.
//
// DOLFIN 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 DOLFIN. If not, see <http://www.gnu.org/licenses/>.
//

#ifndef __PLAZA_REFINEMENT_ND_H
#define __PLAZA_REFINEMENT_ND_H

namespace dolfin
{
  class Mesh;
  class MeshRelation;
  class ParallelRefinement;

  class PlazaRefinementND
  {
  public:

    static void refine(Mesh& new_mesh, const Mesh& mesh, bool redistribute,
                       bool calculate_parent_facets);

    static void refine(Mesh& new_mesh, const Mesh& mesh,
                       const MeshFunction<bool>& refinement_marker,
                       bool redistribute,
                       bool calculate_parent_facets);

    static void refine(Mesh& new_mesh, const Mesh& mesh,
                       const MeshFunction<bool>& refinement_marker,
                       bool calculate_parent_facets,
                       MeshRelation& mesh_relation);


    static void get_simplices
      (std::vector<std::size_t>& simplex_set,
       const std::vector<bool>& marked_edges,
       const std::vector<std::size_t>& longest_edge,
       std::size_t tdim, bool uniform);

  private:

    // Get the longest edge of each face (using local mesh index)
    static void face_long_edge(std::vector<unsigned int>& long_edge,
                               std::vector<bool>& edge_ratio_ok,
                               const Mesh& mesh);

    // 2D version of subdivision allowing for uniform subdivision (flag)
    static void get_triangles
      (std::vector<std::size_t>& tri_set,
       const std::vector<bool>& marked_edges,
       const std::size_t longest_edge,
       bool uniform);

    // 3D version of subdivision
    static void get_tetrahedra
      (std::vector<std::size_t>& tet_set,
       const std::vector<bool>& marked_edges,
       const std::vector<std::size_t>& longest_edge);

    // Convenient interface for both uniform and marker refinement
    static void do_refine(Mesh& new_mesh, const Mesh& mesh,
                          ParallelRefinement& p_ref,
                          const std::vector<unsigned int>& long_edge,
                          const std::vector<bool>& edge_ratio_ok,
                          bool redistribute,
                          bool calculate_parent_facets,
                          MeshRelation& mesh_relation);

    // Propagate edge markers according to rules (longest edge
    // of each face must be marked, if any edge of face is marked)
    static void enforce_rules(ParallelRefinement& p_ref,
                              const Mesh& mesh,
                              const std::vector<unsigned int>& long_edge);

    // Add parent facet markers to new mesh, based on new vertices
    // Only works in 2D at present
    static void set_parent_facet_markers(const Mesh& mesh, Mesh& new_mesh,
                  const std::map<std::size_t, std::size_t>& new_vertex_map);


  };

}

#endif