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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2014, Oracle and/or its affiliates.
// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
// Licensed under the Boost Software License version 1.0.
// http://www.boost.org/users/license.html
#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_MULTIPOINT_TO_GEOMETRY_HPP
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_MULTIPOINT_TO_GEOMETRY_HPP
#include <boost/range.hpp>
#include <boost/geometry/core/point_type.hpp>
#include <boost/geometry/core/tags.hpp>
#include <boost/geometry/strategies/distance.hpp>
#include <boost/geometry/strategies/tags.hpp>
#include <boost/geometry/algorithms/within.hpp>
#include <boost/geometry/algorithms/dispatch/distance.hpp>
#include <boost/geometry/algorithms/detail/check_iterator_range.hpp>
#include <boost/geometry/algorithms/detail/distance/range_to_geometry_rtree.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace distance
{
template <typename MultiPoint1, typename MultiPoint2, typename Strategy>
struct multipoint_to_multipoint
{
typedef typename strategy::distance::services::return_type
<
Strategy,
typename point_type<MultiPoint1>::type,
typename point_type<MultiPoint2>::type
>::type return_type;
static inline return_type apply(MultiPoint1 const& multipoint1,
MultiPoint2 const& multipoint2,
Strategy const& strategy)
{
if (boost::size(multipoint2) < boost::size(multipoint1))
{
return point_or_segment_range_to_geometry_rtree
<
typename boost::range_iterator<MultiPoint2 const>::type,
MultiPoint1,
Strategy
>::apply(boost::begin(multipoint2),
boost::end(multipoint2),
multipoint1,
strategy);
}
return point_or_segment_range_to_geometry_rtree
<
typename boost::range_iterator<MultiPoint1 const>::type,
MultiPoint2,
Strategy
>::apply(boost::begin(multipoint1),
boost::end(multipoint1),
multipoint2,
strategy);
}
};
template <typename MultiPoint, typename Linear, typename Strategy>
struct multipoint_to_linear
{
typedef typename strategy::distance::services::return_type
<
Strategy,
typename point_type<MultiPoint>::type,
typename point_type<Linear>::type
>::type return_type;
static inline return_type apply(MultiPoint const& multipoint,
Linear const& linear,
Strategy const& strategy)
{
return detail::distance::point_or_segment_range_to_geometry_rtree
<
typename boost::range_iterator<MultiPoint const>::type,
Linear,
Strategy
>::apply(boost::begin(multipoint),
boost::end(multipoint),
linear,
strategy);
}
static inline return_type apply(Linear const& linear,
MultiPoint const& multipoint,
Strategy const& strategy)
{
return apply(multipoint, linear, strategy);
}
};
template <typename MultiPoint, typename Areal, typename Strategy>
class multipoint_to_areal
{
private:
struct within_areal
{
within_areal(Areal const& areal)
: m_areal(areal)
{}
template <typename Point>
inline bool apply(Point const& point) const
{
return geometry::within(point, m_areal);
}
Areal const& m_areal;
};
public:
typedef typename strategy::distance::services::return_type
<
Strategy,
typename point_type<MultiPoint>::type,
typename point_type<Areal>::type
>::type return_type;
static inline return_type apply(MultiPoint const& multipoint,
Areal const& areal,
Strategy const& strategy)
{
within_areal predicate(areal);
if (check_iterator_range
<
within_areal, false
>::apply(boost::begin(multipoint),
boost::end(multipoint),
predicate))
{
return 0;
}
return detail::distance::point_or_segment_range_to_geometry_rtree
<
typename boost::range_iterator<MultiPoint const>::type,
Areal,
Strategy
>::apply(boost::begin(multipoint),
boost::end(multipoint),
areal,
strategy);
}
static inline return_type apply(Areal const& areal,
MultiPoint const& multipoint,
Strategy const& strategy)
{
return apply(multipoint, areal, strategy);
}
};
}} // namespace detail::distance
#endif // DOXYGEN_NO_DETAIL
#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{
template <typename MultiPoint1, typename MultiPoint2, typename Strategy>
struct distance
<
MultiPoint1, MultiPoint2, Strategy,
multi_point_tag, multi_point_tag,
strategy_tag_distance_point_point, false
> : detail::distance::multipoint_to_multipoint
<
MultiPoint1, MultiPoint2, Strategy
>
{};
template <typename MultiPoint, typename Linear, typename Strategy>
struct distance
<
MultiPoint, Linear, Strategy, multi_point_tag, linear_tag,
strategy_tag_distance_point_segment, false
> : detail::distance::multipoint_to_linear<MultiPoint, Linear, Strategy>
{};
template <typename Linear, typename MultiPoint, typename Strategy>
struct distance
<
Linear, MultiPoint, Strategy, linear_tag, multi_point_tag,
strategy_tag_distance_point_segment, false
> : detail::distance::multipoint_to_linear<MultiPoint, Linear, Strategy>
{};
template <typename MultiPoint, typename Areal, typename Strategy>
struct distance
<
MultiPoint, Areal, Strategy, multi_point_tag, areal_tag,
strategy_tag_distance_point_segment, false
> : detail::distance::multipoint_to_areal<MultiPoint, Areal, Strategy>
{};
template <typename Areal, typename MultiPoint, typename Strategy>
struct distance
<
Areal, MultiPoint, Strategy, areal_tag, multi_point_tag,
strategy_tag_distance_point_segment, false
> : detail::distance::multipoint_to_areal<MultiPoint, Areal, Strategy>
{};
} // namespace dispatch
#endif // DOXYGEN_NO_DISPATCH
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_MULTIPOINT_TO_GEOMETRY_HPP
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