distance_and_closest_point_geodesic.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_TRANSFORM_DISTANCE_AND_CLOSEST_POINT_GEODESIC_HH
# define MLN_TRANSFORM_DISTANCE_AND_CLOSEST_POINT_GEODESIC_HH


# include <mln/canvas/distance_geodesic.hh>
# include <mln/transform/internal/closest_point_functor.hh>

# include <mln/data/fill.hh>
# include <mln/util/couple.hh>


namespace mln
{

  namespace transform
  {

    template <typename I, typename N, typename D>
    util::couple<mln_ch_value(I,D), mln_ch_value(I,mln_psite(I))>
    distance_and_closest_point_geodesic(const Image<I>& input,
                                        const Neighborhood<N>& nbh,
                                        D max);


    template <typename P, typename N, typename D>
    util::couple<mln_image_from_grid(mln_grid(P),D),
                 mln_image_from_grid(mln_grid(P),unsigned)>
    distance_and_closest_point_geodesic(const p_array<P>& pset,
                                        const box<P>& closest_point_domain,
                                        const Neighborhood<N>& nbh,
                                        D max);


# ifndef MLN_INCLUDE_ONLY

    template <typename I, typename N, typename D>
    inline
    util::couple<mln_ch_value(I,D), mln_ch_value(I, mln_psite(I))>
    distance_and_closest_point_geodesic(const Image<I>& input,
                                        const Neighborhood<N>& nbh,
                                        D max)
    {
      trace::entering("transform::distance_closest_point_geodesic");

      mln_precondition(exact(input).is_valid());
      mln_precondition(exact(nbh).is_valid());

      internal::closest_point_functor_with_sites<I> f;
      mln_ch_value(I,D) dmap = mln::canvas::distance_geodesic(input, nbh,
                                                              max, f);

      trace::exiting("transform::distance_and_closest_point_geodesic");
      return make::couple(dmap, f.cp_ima);
    }

    template <typename P, typename N, typename D>
    inline
    util::couple<mln_image_from_grid(mln_grid(P),D), mln_image_from_grid(mln_grid(P),unsigned)>
    distance_and_closest_point_geodesic(const p_array<P>& pset,
                                        const box<P>& closest_point_domain,
                                        const Neighborhood<N>& nbh,
                                        D max)
    {
      trace::entering("transform::distance_and_closest_point_geodesic");

      mln_precondition(closest_point_domain.is_valid());
      mln_precondition(exact(nbh).is_valid());
      mln_precondition(geom::bbox(pset) <= closest_point_domain);

      typedef mln_image_from_grid(mln_grid(P), bool) I;
      internal::closest_point_functor_with_indexes<I> f(pset);

      I ima(closest_point_domain);
      data::fill(ima, false);
      data::fill((ima | pset).rw(), true);

      mln_ch_value(I,D) dmap = mln::canvas::distance_geodesic(ima, nbh, max, f);

      trace::exiting("transform::distance_and_closest_point_geodesic");
      return make::couple(dmap, f.cp_ima);
    }

# endif // ! MLN_INCLUDE_ONLY

  } // end of namespace mln::transform

} // end of namespace mln


#endif // ! MLN_TRANSFORM_DISTANCE_AND_CLOSEST_POINT_GEODESIC_HH