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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_RING_PROPERTIES_HPP
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_RING_PROPERTIES_HPP
#include <boost/geometry/algorithms/area.hpp>
#include <boost/geometry/algorithms/within.hpp>
#include <boost/geometry/algorithms/detail/point_on_border.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace overlay
{
template <typename Point, typename AreaType>
struct ring_properties
{
typedef Point point_type;
typedef AreaType area_type;
bool valid;
// Filled by "select_rings"
Point point;
area_type area;
// Filled by "update_ring_selection"
bool reversed;
// Filled/used by "assign_rings"
bool discarded;
ring_identifier parent;
area_type parent_area;
std::vector<ring_identifier> children;
inline ring_properties()
: valid(false)
, area(area_type())
, reversed(false)
, discarded(false)
, parent_area(-1)
{}
template <typename RingOrBox, typename AreaStrategy>
inline ring_properties(RingOrBox const& ring_or_box, AreaStrategy const& strategy)
: reversed(false)
, discarded(false)
, parent_area(-1)
{
this->area = geometry::area(ring_or_box, strategy);
valid = geometry::point_on_border(this->point, ring_or_box);
}
inline area_type get_area() const
{
return reversed ? -area : area;
}
};
}} // namespace detail::overlay
#endif // DOXYGEN_NO_DETAIL
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_RING_PROPERTIES_HPP
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