topology_callbacks.h

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/*
 * Copyright (c) 2015:  G-CSC, Goethe University Frankfurt
 * Author: Sebastian Reiter
 * 
 * This file is part of UG4.
 * 
 * UG4 is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License version 3 (as published by the
 * Free Software Foundation) with the following additional attribution
 * requirements (according to LGPL/GPL v3 §7):
 * 
 * (1) The following notice must be displayed in the Appropriate Legal Notices
 * of covered and combined works: "Based on UG4 (www.ug4.org/license)".
 * 
 * (2) The following notice must be displayed at a prominent place in the
 * terminal output of covered works: "Based on UG4 (www.ug4.org/license)".
 * 
 * (3) The following bibliography is recommended for citation and must be
 * preserved in all covered files:
 * "Reiter, S., Vogel, A., Heppner, I., Rupp, M., and Wittum, G. A massively
 *   parallel geometric multigrid solver on hierarchically distributed grids.
 *   Computing and visualization in science 16, 4 (2013), 151-164"
 * "Vogel, A., Reiter, S., Rupp, M., Nägel, A., and Wittum, G. UG4 -- a novel
 *   flexible software system for simulating pde based models on high performance
 *   computers. Computing and visualization in science 16, 4 (2013), 165-179"
 * 
 * This program 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.
 */
 
#ifndef __H__UG_topology_callbacks
#define __H__UG_topology_callbacks
 
#include "lib_grid/algorithms/geom_obj_util/vertex_util.h"
#include "element_callback_interface.h"
 
namespace ug{
 
class IsOnBoundary : public ElementCallback
{
  public:
    IsOnBoundary(Grid& g) :
      m_grid(g) {}
 
    bool operator() (Vertex* v) const {return callback(v);}
    bool operator() (Edge* e) const   {return callback(e);}
    bool operator() (Face* f) const   {return callback(f);}
    bool operator()	(Volume*) const   {return false;}
 
  private:
    template <class TElem>
    bool callback(TElem* e)  const    {return LiesOnBoundary(m_grid, e);}
 
  private:
    Grid& m_grid;
};
 
class IsNotOnBoundary : public ElementCallback
{
  public:
    IsNotOnBoundary(Grid& g) :
      m_grid(g) {}
 
    bool operator() (Vertex* v) const {return callback(v);}
    bool operator() (Edge* e) const   {return callback(e);}
    bool operator() (Face* f) const   {return callback(f);}
    bool operator()	(Volume*) const   {return true;}
  private:
    template <class TElem>
    bool callback(TElem* e) const   {return !LiesOnBoundary(m_grid, e);}
 
  private:
    Grid& m_grid;
};
 
 
class IsBoundaryOrManifodFace : public ElementCallback
{
  public:
    IsBoundaryOrManifodFace(Grid& g) :
      m_grid(g) {}
 
    bool operator() (Vertex* v) const {return false;}
    bool operator() (Edge* e) const   {return false;}
    bool operator() (Face* f) const   {return callback(f);}
    bool operator()	(Volume*) const   {return true;}
 
  private:
    template <class TElem>
    bool callback(TElem* e) const 
    {
    //todo: mutex?
    //todo: m_grid.num_associated_elements<Volume>(e)...
      const_cast<Grid&>(m_grid).associated_elements(
        const_cast<IsBoundaryOrManifodFace*>(this)->m_tmpVols, e);
      return m_tmpVols.size() < 2;
    }
 
  private:
    Grid& m_grid;
    Grid::volume_traits::secure_container m_tmpVols;// optimization for single-thread
};
 
class IsNotBoundaryOrManifodFace : public ElementCallback
{
  public:
    IsNotBoundaryOrManifodFace(Grid& g) :
      m_callback(g) {}
 
    bool operator() (Vertex* v) const {return !m_callback(v);}
    bool operator() (Edge* e) const   {return !m_callback(e);}
    bool operator() (Face* f) const   {return !m_callback(f);}
    bool operator()	(Volume* v) const {return !m_callback(v);}
 
  private:
    IsBoundaryOrManifodFace m_callback;
}; //lib_grid_element_callbacks
 
}// end of namespace
 
#endif  //__H__UG_topology_callbacks