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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
// This file was modified by Oracle on 2017.
// Modifications copyright (c) 2017 Oracle and/or its affiliates.
// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
// Use, modification and distribution is subject to 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_OVERLAY_GET_INTERSECTION_POINTS_HPP
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_GET_INTERSECTION_POINTS_HPP
#include <cstddef>
#include <boost/mpl/if.hpp>
#include <boost/range.hpp>
#include <boost/geometry/algorithms/convert.hpp>
#include <boost/geometry/algorithms/detail/overlay/get_turns.hpp>
#include <boost/geometry/geometries/segment.hpp>
#include <boost/geometry/policies/robustness/robust_point_type.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace get_intersection_points
{
template
<
typename Point1,
typename Point2,
typename TurnInfo
>
struct get_turn_without_info
{
template <typename Strategy, typename RobustPolicy, typename OutputIterator>
static inline OutputIterator apply(
Point1 const& pi, Point1 const& pj, Point1 const& /*pk*/,
Point2 const& qi, Point2 const& qj, Point2 const& /*qk*/,
bool /*is_p_first*/, bool /*is_p_last*/,
bool /*is_q_first*/, bool /*is_q_last*/,
TurnInfo const& ,
Strategy const& strategy,
RobustPolicy const& robust_policy,
OutputIterator out)
{
typedef typename TurnInfo::point_type turn_point_type;
typedef policies::relate::segments_intersection_points
<
segment_intersection_points
<
turn_point_type,
typename geometry::segment_ratio_type
<
turn_point_type, RobustPolicy
>::type
>
> policy_type;
typedef model::referring_segment<Point1 const> segment_type1;
typedef model::referring_segment<Point2 const> segment_type2;
segment_type1 p1(pi, pj);
segment_type2 q1(qi, qj);
typedef typename geometry::robust_point_type
<
Point1, RobustPolicy
>::type robust_point_type;
robust_point_type pi_rob, pj_rob, qi_rob, qj_rob;
geometry::recalculate(pi_rob, pi, robust_policy);
geometry::recalculate(pj_rob, pj, robust_policy);
geometry::recalculate(qi_rob, qi, robust_policy);
geometry::recalculate(qj_rob, qj, robust_policy);
typename policy_type::return_type result
= strategy.apply(p1, q1, policy_type(), robust_policy,
pi_rob, pj_rob, qi_rob, qj_rob);
for (std::size_t i = 0; i < result.count; i++)
{
TurnInfo tp;
geometry::convert(result.intersections[i], tp.point);
*out++ = tp;
}
return out;
}
};
}} // namespace detail::get_intersection_points
#endif // DOXYGEN_NO_DETAIL
template
<
typename Geometry1,
typename Geometry2,
typename RobustPolicy,
typename Turns,
typename Strategy
>
inline void get_intersection_points(Geometry1 const& geometry1,
Geometry2 const& geometry2,
RobustPolicy const& robust_policy,
Turns& turns,
Strategy const& strategy)
{
concepts::check_concepts_and_equal_dimensions<Geometry1 const, Geometry2 const>();
typedef detail::get_intersection_points::get_turn_without_info
<
typename point_type<Geometry1>::type,
typename point_type<Geometry2>::type,
typename boost::range_value<Turns>::type
> TurnPolicy;
detail::get_turns::no_interrupt_policy interrupt_policy;
boost::mpl::if_c
<
reverse_dispatch<Geometry1, Geometry2>::type::value,
dispatch::get_turns_reversed
<
typename tag<Geometry1>::type,
typename tag<Geometry2>::type,
Geometry1, Geometry2,
false, false,
TurnPolicy
>,
dispatch::get_turns
<
typename tag<Geometry1>::type,
typename tag<Geometry2>::type,
Geometry1, Geometry2,
false, false,
TurnPolicy
>
>::type::apply(
0, geometry1,
1, geometry2,
strategy,
robust_policy,
turns, interrupt_policy);
}
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_GET_INTERSECTION_POINTS_HPP
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