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

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

// This file was modified by Oracle on 2015.
// Modifications copyright (c) 2015 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_STRATEGIES_INTERSECTION_RESULT_HPP
#define BOOST_GEOMETRY_STRATEGIES_INTERSECTION_RESULT_HPP

#if defined(HAVE_MATRIX_AS_STRING)
#include <string>
#endif

#include <cstddef>



namespace boost { namespace geometry
{

template <typename SegmentRatio>
struct fraction_type
{
    SegmentRatio robust_ra; // TODO this can be renamed now to "ra"
    SegmentRatio robust_rb;

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

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

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

};

//
/*!
\brief return-type for segment-intersection
\note Set in intersection_points.hpp, from segment_intersection_info
*/
template <typename Point, typename SegmentRatio>
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)
    {}
};

// All assigned in cart_intersect, passed to intersection_points
template <typename CoordinateType, typename PromotedType, typename SegmentRatio>
struct segment_intersection_info
{
    typedef PromotedType promoted_type;

    CoordinateType dx_a, dy_a;
    CoordinateType dx_b, dy_b;
    SegmentRatio robust_ra;
    SegmentRatio robust_rb;
};


}} // namespace boost::geometry


#endif // BOOST_GEOMETRY_STRATEGIES_INTERSECTION_RESULT_HPP
