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83 lines
2.1 KiB
C++
83 lines
2.1 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
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// This file was modified by Oracle on 2017.
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// Modifications copyright (c) 2017 Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_RING_PROPERTIES_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_RING_PROPERTIES_HPP
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#include <boost/geometry/algorithms/area.hpp>
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#include <boost/geometry/algorithms/within.hpp>
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#include <boost/geometry/algorithms/detail/point_on_border.hpp>
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namespace boost { namespace geometry
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{
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#ifndef DOXYGEN_NO_DETAIL
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namespace detail { namespace overlay
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{
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template <typename Point, typename AreaType>
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struct ring_properties
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{
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typedef Point point_type;
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typedef AreaType area_type;
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bool valid;
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// Filled by "select_rings"
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Point point;
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area_type area;
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// Filled by "update_ring_selection"
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bool reversed;
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// Filled/used by "assign_rings"
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bool discarded;
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ring_identifier parent;
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area_type parent_area;
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std::vector<ring_identifier> children;
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inline ring_properties()
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: valid(false)
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, area(area_type())
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, reversed(false)
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, discarded(false)
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, parent_area(-1)
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{}
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template <typename RingOrBox, typename Strategy>
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inline ring_properties(RingOrBox const& ring_or_box, Strategy const& strategy)
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: reversed(false)
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, discarded(false)
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, parent_area(-1)
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{
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this->area = geometry::area(ring_or_box, strategy);
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valid = geometry::point_on_border(this->point, ring_or_box);
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}
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inline area_type get_area() const
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{
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return reversed ? -area : area;
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}
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};
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}} // namespace detail::overlay
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#endif // DOXYGEN_NO_DETAIL
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_RING_PROPERTIES_HPP
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