localmeshcoarsening.h

来自「Dolfin provide a high-performance linear」· C头文件 代码 · 共 57 行

// Copyright (C) 2006 Johan Hoffman.
// Licensed under the GNU LGPL Version 2.1.
//
// First added:  2006-11-01

#ifndef __LOCAL_MESH_COARSENING_H
#define __LOCAL_MESH_COARSENING_H

#include <dolfin/MeshFunction.h>

namespace dolfin
{

  class Mesh;
  class Edge;
  class Vertex;
  class MeshEditor;

  /// This class implements local mesh coarsening for different mesh types.

  class LocalMeshCoarsening
  {
  public:

    /// Coarsen simplicial mesh locally by edge collapse 
    static void coarsenMeshByEdgeCollapse(Mesh& mesh, 
                                          MeshFunction<bool>& cell_marker,
                                          bool coarsen_boundary = false); 

  private:
    
    /// Check that edge collapse is ok  
    static bool coarsenMeshOk(Mesh& mesh, uint edge_index, uint* edge_vertex, 
			      MeshFunction<bool>& vertex_forbidden);  

    /// Collapse edge by node deletion 
    static void collapseEdge(Mesh& mesh, Edge& edge, 
                             Vertex& vertex_to_remove, 
                             MeshFunction<bool>& cell_to_remove, 
                             Array<int>& old2new_vertex, 
			     Array<int>& old2new_cell,
                             MeshEditor& editor, 
                             uint& current_cell); 

    /// Coarsen simplicial cell by edge collapse 
    static bool coarsenCell(Mesh& mesh, Mesh& coarse_mesh,
			    int cell_id,
			    Array<int>& old2new_vertex,
			    Array<int>& old2new_cell,
			    bool coarsen_boundary = false);

  };

}

#endif