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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.
// Copyright (c) 2008-2015 Bruno Lalande, Paris, France.
// Copyright (c) 2009-2015 Mateusz Loskot, London, UK.
// Copyright (c) 2014-2015 Samuel Debionne, Grenoble, France.
// This file was modified by Oracle on 2015.
// Modifications copyright (c) 2015, Oracle and/or its affiliates.
// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_EXPAND_INDEXED_HPP
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_EXPAND_INDEXED_HPP
#include <cstddef>
#include <boost/geometry/core/access.hpp>
#include <boost/geometry/core/tags.hpp>
#include <boost/geometry/util/select_coordinate_type.hpp>
#include <boost/geometry/strategies/compare.hpp>
#include <boost/geometry/policies/compare.hpp>
#include <boost/geometry/algorithms/dispatch/expand.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace expand
{
template
<
typename StrategyLess, typename StrategyGreater,
std::size_t Index,
std::size_t Dimension, std::size_t DimensionCount
>
struct indexed_loop
{
template <typename Box, typename Geometry>
static inline void apply(Box& box, Geometry const& source)
{
typedef typename strategy::compare::detail::select_strategy
<
StrategyLess, 1, Box, Dimension
>::type less_type;
typedef typename strategy::compare::detail::select_strategy
<
StrategyGreater, -1, Box, Dimension
>::type greater_type;
typedef typename select_coordinate_type
<
Box,
Geometry
>::type coordinate_type;
less_type less;
greater_type greater;
coordinate_type const coord = get<Index, Dimension>(source);
if (less(coord, get<min_corner, Dimension>(box)))
{
set<min_corner, Dimension>(box, coord);
}
if (greater(coord, get<max_corner, Dimension>(box)))
{
set<max_corner, Dimension>(box, coord);
}
indexed_loop
<
StrategyLess, StrategyGreater,
Index, Dimension + 1, DimensionCount
>::apply(box, source);
}
};
template
<
typename StrategyLess, typename StrategyGreater,
std::size_t Index, std::size_t DimensionCount
>
struct indexed_loop
<
StrategyLess, StrategyGreater,
Index, DimensionCount, DimensionCount
>
{
template <typename Box, typename Geometry>
static inline void apply(Box&, Geometry const&) {}
};
// Changes a box such that the other box is also contained by the box
template
<
std::size_t Dimension, std::size_t DimensionCount,
typename StrategyLess, typename StrategyGreater
>
struct expand_indexed
{
template <typename Box, typename Geometry>
static inline void apply(Box& box, Geometry const& geometry)
{
indexed_loop
<
StrategyLess, StrategyGreater,
0, Dimension, DimensionCount
>::apply(box, geometry);
indexed_loop
<
StrategyLess, StrategyGreater,
1, Dimension, DimensionCount
>::apply(box, geometry);
}
};
}} // namespace detail::expand
#endif // DOXYGEN_NO_DETAIL
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_EXPAND_INDEXED_HPP
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