translation.hh

// Copyright (C) 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_FUN_P2P_TRANSLATION_HH
# define MLN_FUN_P2P_TRANSLATION_HH


# include <mln/core/concept/function.hh>
# include <mln/core/concept/gdpoint.hh>


namespace mln
{

  namespace fun
  {

    namespace p2p
    {

      template <typename P>
      struct translation_t : public Function_v2v< translation_t<P> >
      {
        typedef P result;

        translation_t(const mln_delta(P)& dp);

        P operator()(const P& p) const;
        P inverse(const P& p) const;

      protected:
        mln_delta(P) dp_;
      };


      template <typename D>
      translation_t<mln_site(D)>
      translation(const Gdpoint<D>& dp);



# ifndef MLN_INCLUDE_ONLY

      template <typename P>
      inline
      translation_t<P>::translation_t(const mln_delta(P)& dp)
        : dp_(dp)
      {
      }

      template <typename P>
      inline
      P
      translation_t<P>::operator()(const P& p) const
      {
        return p + dp_;
      }

      template <typename P>
      inline
      P
      translation_t<P>::inverse(const P& p) const
      {
        return p - dp_;
      }


      template <typename D>
      inline
      translation_t<mln_site(D)>
      translation(const Gdpoint<D>& dp)
      {
        translation_t<mln_site(D)> tmp(exact(dp));
        return tmp;
      }


# endif // ! MLN_INCLUDE_ONLY

    } // end of namespace mln::fun::p2p

  } // end of namespace mln::fun

} // end of namespace mln


#endif // ! MLN_FUN_P2P_TRANSLATION_HH