Boost C++ Libraries

boost/geometry/strategies/intersection_result.hpp

// Boost.Geometry (aka GGL, Generic Geometry Library)

// Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.

// This file was modified by Oracle on 2015-2024.
// Modifications copyright (c) 2015-2024 Oracle and/or its affiliates.
// Contributed and/or modified by Vissarion Fysikopoulos, on behalf of Oracle
// 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_STRATEGIES_INTERSECTION_RESULT_HPP
#define BOOST_GEOMETRY_STRATEGIES_INTERSECTION_RESULT_HPP

#include <cstddef>

#include <boost/geometry/core/coordinate_type.hpp>
#include <boost/geometry/policies/robustness/segment_ratio.hpp>

namespace boost { namespace geometry
{

template <typename SegmentRatio>
struct fraction_type
{
    SegmentRatio ra;
    SegmentRatio rb;

    bool initialized;
    inline fraction_type()
        : initialized(false)
    {}

    template <typename Info>
    inline void assign(Info const& info)
    {
        initialized = true;
        ra = info.ra;
        rb = info.rb;
    }

    inline void assign(SegmentRatio const& a, SegmentRatio const& b)
    {
        initialized = true;
        ra = a;
        rb = b;
    }

};

//
/*!
\brief return-type for segment-intersection
\note Set in intersection_points.hpp, from segment_intersection_info
*/
template
<
    typename Point,
    typename SegmentRatio = segment_ratio<coordinate_type_t<Point>>
>
struct segment_intersection_points
{
    std::size_t count; // The number of intersection points

    // TODO: combine intersections and fractions in one struct
    Point intersections[2];
    fraction_type<SegmentRatio> fractions[2];
    typedef Point point_type;

    segment_intersection_points()
        : count(0)
    {}
};

}} // namespace boost::geometry


#endif // BOOST_GEOMETRY_STRATEGIES_INTERSECTION_RESULT_HPP