neighb3d.hh

// Copyright (C) 2007, 2008, 2009 EPITA Research and Development Laboratory (LRDE)
//
// This file is part of Olena.
//
// Olena is free software: you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation, version 2 of the License.
//
// Olena 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
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Olena.  If not, see <http://www.gnu.org/licenses/>.
//
// As a special exception, you may use this file as part of a free
// software project without restriction.  Specifically, if other files
// instantiate templates or use macros or inline functions from this
// file, or you compile this file and link it with other files to produce
// an executable, this file does not by itself cause the resulting
// executable to be covered by the GNU General Public License.  This
// exception does not however invalidate any other reasons why the
// executable file might be covered by the GNU General Public License.

#ifndef MLN_CORE_ALIAS_NEIGHB3D_HH
# define MLN_CORE_ALIAS_NEIGHB3D_HH



# include <cmath>
# include <mln/core/neighb.hh>
# include <mln/core/alias/window3d.hh>
# include <mln/win/sym.hh>
# include <mln/convert/from_to.hh>


namespace mln
{

  //
  typedef neighb<window3d> neighb3d;



  const neighb3d& c2_3d_sli();



  const neighb3d& c4_3d();


  const neighb3d& c8_3d();



  const neighb3d& c6();


  const neighb3d& c18();


  const neighb3d& c26();




  namespace convert
  {

    namespace over_load
    {

      template <unsigned S>
      void from_to_(const bool (&values)[S], neighb3d& nbh);

    } // end of namespace mln::convert::over_load

  } // end of namespace mln::convert



# ifndef MLN_INCLUDE_ONLY

  inline
  const neighb3d& c2_3d_sli()
  {
    static neighb3d it;
    if (it.size() == 0)
      {
        window3d& win = it.hook_win_();
        win
          .insert(-1, 0, 0)
          .insert(1, 0, 0);
      }
    return it;
  }


  inline
  const neighb3d& c4_3d()
  {
    static neighb3d it;
    if (it.size() == 0)
      {
        window3d& win = it.hook_win_();
        win
          .insert(0, 1, 0)
          .insert(0, 0, 1);
        win
          .insert(win::sym(win));
      }
    return it;
  }

  inline
  const neighb3d& c8_3d()
  {
    static neighb3d it;
    if (it.size() == 0)
      {
        static const bool vals[] = { 1, 1, 1,
                                     1, 0, 1,
                                     1, 1, 1 };
        convert::from_to(vals, it);
      }
    return it;
  }

  inline
  const neighb3d& c6()
  {
    static neighb3d it;
    if (it.size() == 0)
      {
        window3d& win = it.hook_win_();
        win
          .insert(1, 0, 0)
          .insert(0, 1, 0)
          .insert(0, 0, 1);
        win
          .insert(win::sym(win));
      }
    return it;
  }

  inline
  const neighb3d& c18()
  {
    static neighb3d it;
    if (it.size() == 0)
      {
        window3d& win = it.hook_win_();
        win
          .insert(1,  0,  1)
          .insert(1,  0, -1)
          .insert(0,  1,  1)
          .insert(0,  1, -1)
          .insert(1,  1,  0)
          .insert(1, -1,  0);
        win
          .insert(win::sym(win))
          .insert(c6().win());
      }
    return it;
  }

  inline
  const neighb3d& c26()
  {
    static neighb3d it;
    if (it.size() == 0)
      {
        window3d& win = it.hook_win_();
        win
          .insert(1,  1,  1)
          .insert(1,  1, -1)
          .insert(1, -1,  1)
          .insert(1, -1, -1);
        win
          .insert(win::sym(win))
          .insert(c18().win());
      }
    return it;
  }


  namespace convert
  {

    namespace over_load
    {

      template <unsigned S>
      void
      from_to_(const bool (&values)[S], neighb3d& nbh)
      {
# ifndef NDEBUG
        const int h = unsigned(std::pow(float(S), float(1. / 3.))) / 2;
        mln_precondition((2 * h + 1) * (2 * h + 1) * (2 * h + 1) == S);
# endif // ! NDEBUG
        window3d win;
        from_to_(values, win);
        mln_precondition(win.is_neighbable_());
        nbh.change_window(win);
      }

    } // end of namespace mln::convert::over_load

  } // end of namespace mln::convert

# endif // ! MLN_INCLUDE_ONLY

} // end of namespace mln


#endif // ! MLN_CORE_ALIAS_NEIGHB3D_HH