334 lines
9.6 KiB
C++
334 lines
9.6 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2015 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2015 Mateusz Loskot, London, UK.
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// Copyright (c) 2013-2015 Adam Wulkiewicz, Lodz, Poland.
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// This file was modified by Oracle on 2013-2022.
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// Modifications copyright (c) 2013-2022, Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
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// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
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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_TOUCHES_INTERFACE_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_TOUCHES_INTERFACE_HPP
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#include <deque>
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#include <boost/geometry/core/reverse_dispatch.hpp>
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#include <boost/geometry/core/tag.hpp>
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#include <boost/geometry/core/tag_cast.hpp>
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#include <boost/geometry/core/tags.hpp>
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#include <boost/geometry/core/visit.hpp>
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#include <boost/geometry/geometries/adapted/boost_variant.hpp>
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#include <boost/geometry/geometries/concepts/check.hpp>
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#include <boost/geometry/strategies/default_strategy.hpp>
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#include <boost/geometry/strategies/detail.hpp>
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#include <boost/geometry/strategies/relate/services.hpp>
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namespace boost { namespace geometry
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{
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#ifndef DOXYGEN_NO_DISPATCH
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namespace dispatch {
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// TODO: Since CastedTags are used is Reverse needed?
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template
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<
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typename Geometry1,
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typename Geometry2,
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typename Tag1 = typename tag<Geometry1>::type,
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typename Tag2 = typename tag<Geometry2>::type,
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typename CastedTag1 = typename tag_cast<Tag1, pointlike_tag, linear_tag, areal_tag>::type,
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typename CastedTag2 = typename tag_cast<Tag2, pointlike_tag, linear_tag, areal_tag>::type,
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bool Reverse = reverse_dispatch<Geometry1, Geometry2>::type::value
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>
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struct touches
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: not_implemented<Tag1, Tag2>
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{};
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// If reversal is needed, perform it
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template
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<
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typename Geometry1, typename Geometry2,
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typename Tag1, typename Tag2,
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typename CastedTag1, typename CastedTag2
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>
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struct touches<Geometry1, Geometry2, Tag1, Tag2, CastedTag1, CastedTag2, true>
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: touches<Geometry2, Geometry1, Tag2, Tag1, CastedTag2, CastedTag1, false>
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{
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template <typename Strategy>
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static inline bool apply(Geometry1 const& g1, Geometry2 const& g2, Strategy const& strategy)
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{
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return touches<Geometry2, Geometry1>::apply(g2, g1, strategy);
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}
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};
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} // namespace dispatch
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#endif // DOXYGEN_NO_DISPATCH
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namespace resolve_strategy
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{
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template
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<
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typename Strategy,
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bool IsUmbrella = strategies::detail::is_umbrella_strategy<Strategy>::value
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>
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struct touches
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{
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template <typename Geometry1, typename Geometry2>
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static inline bool apply(Geometry1 const& geometry1,
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Geometry2 const& geometry2,
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Strategy const& strategy)
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{
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return dispatch::touches
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<
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Geometry1, Geometry2
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>::apply(geometry1, geometry2, strategy);
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}
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};
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template <typename Strategy>
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struct touches<Strategy, false>
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{
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template <typename Geometry1, typename Geometry2>
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static inline bool apply(Geometry1 const& geometry1,
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Geometry2 const& geometry2,
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Strategy const& strategy)
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{
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using strategies::relate::services::strategy_converter;
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return dispatch::touches
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<
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Geometry1, Geometry2
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>::apply(geometry1, geometry2,
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strategy_converter<Strategy>::get(strategy));
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}
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};
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template <>
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struct touches<default_strategy, false>
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{
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template <typename Geometry1, typename Geometry2>
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static inline bool apply(Geometry1 const& geometry1,
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Geometry2 const& geometry2,
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default_strategy)
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{
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typedef typename strategies::relate::services::default_strategy
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<
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Geometry1,
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Geometry2
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>::type strategy_type;
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return dispatch::touches
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<
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Geometry1, Geometry2
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>::apply(geometry1, geometry2, strategy_type());
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}
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};
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} // namespace resolve_strategy
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namespace resolve_dynamic {
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template
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<
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typename Geometry1, typename Geometry2,
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typename Tag1 = typename geometry::tag<Geometry1>::type,
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typename Tag2 = typename geometry::tag<Geometry2>::type
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>
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struct touches
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{
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template <typename Strategy>
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static bool apply(Geometry1 const& geometry1, Geometry2 const& geometry2,
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Strategy const& strategy)
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{
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concepts::check<Geometry1 const>();
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concepts::check<Geometry2 const>();
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return resolve_strategy::touches
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<
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Strategy
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>::apply(geometry1, geometry2, strategy);
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}
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};
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template <typename Geometry1, typename Geometry2, typename Tag2>
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struct touches<Geometry1, Geometry2, dynamic_geometry_tag, Tag2>
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{
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template <typename Strategy>
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static bool apply(Geometry1 const& geometry1, Geometry2 const& geometry2,
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Strategy const& strategy)
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{
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bool result = false;
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traits::visit<Geometry1>::apply([&](auto const& g1)
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{
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result = touches
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<
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util::remove_cref_t<decltype(g1)>,
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Geometry2
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>::apply(g1, geometry2, strategy);
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}, geometry1);
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return result;
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}
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};
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template <typename Geometry1, typename Geometry2, typename Tag1>
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struct touches<Geometry1, Geometry2, Tag1, dynamic_geometry_tag>
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{
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template <typename Strategy>
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static bool apply(Geometry1 const& geometry1, Geometry2 const& geometry2,
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Strategy const& strategy)
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{
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bool result = false;
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traits::visit<Geometry2>::apply([&](auto const& g2)
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{
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result = touches
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<
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Geometry1,
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util::remove_cref_t<decltype(g2)>
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>::apply(geometry1, g2, strategy);
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}, geometry2);
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return result;
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}
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};
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template <typename Geometry1, typename Geometry2>
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struct touches<Geometry1, Geometry2, dynamic_geometry_tag, dynamic_geometry_tag>
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{
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template <typename Strategy>
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static bool apply(Geometry1 const& geometry1, Geometry2 const& geometry2,
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Strategy const& strategy)
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{
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bool result = false;
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traits::visit<Geometry1, Geometry2>::apply([&](auto const& g1, auto const& g2)
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{
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result = touches
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<
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util::remove_cref_t<decltype(g1)>,
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util::remove_cref_t<decltype(g2)>
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>::apply(g1, g2, strategy);
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}, geometry1, geometry2);
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return result;
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}
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};
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template <typename Geometry, typename Tag = typename geometry::tag<Geometry>::type>
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struct self_touches;
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template <typename Geometry>
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struct self_touches<Geometry, dynamic_geometry_tag>
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{
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static bool apply(Geometry const& geometry)
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{
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bool result = false;
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traits::visit<Geometry>::apply([&](auto const& g)
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{
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result = self_touches
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<
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util::remove_cref_t<decltype(g)>
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>::apply(g);
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}, geometry);
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return result;
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}
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};
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} // namespace resolve_dynamic
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/*!
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\brief \brief_check{has at least one touching point (self-tangency)}
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\note This function can be called for one geometry (self-tangency) and
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also for two geometries (touch)
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\ingroup touches
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\tparam Geometry \tparam_geometry
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\param geometry \param_geometry
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\return \return_check{is self-touching}
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\qbk{distinguish,one geometry}
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\qbk{[def __one_parameter__]}
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\qbk{[include reference/algorithms/touches.qbk]}
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\qbk{
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[heading Examples]
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[touches_one_geometry]
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[touches_one_geometry_output]
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}
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*/
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template <typename Geometry>
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inline bool touches(Geometry const& geometry)
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{
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return resolve_dynamic::self_touches<Geometry>::apply(geometry);
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}
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/*!
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\brief \brief_check2{have at least one touching point (tangent - non overlapping)}
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\ingroup touches
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\tparam Geometry1 \tparam_geometry
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\tparam Geometry2 \tparam_geometry
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\param geometry1 \param_geometry
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\param geometry2 \param_geometry
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\return \return_check2{touch each other}
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\qbk{distinguish,two geometries}
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\qbk{[include reference/algorithms/touches.qbk]}
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\qbk{
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[heading Examples]
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[touches_two_geometries]
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[touches_two_geometries_output]
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}
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*/
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template <typename Geometry1, typename Geometry2>
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inline bool touches(Geometry1 const& geometry1, Geometry2 const& geometry2)
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{
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return resolve_dynamic::touches
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<
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Geometry1, Geometry2
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>::apply(geometry1, geometry2, default_strategy());
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}
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/*!
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\brief \brief_check2{have at least one touching point (tangent - non overlapping)}
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\ingroup touches
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\tparam Geometry1 \tparam_geometry
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\tparam Geometry2 \tparam_geometry
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\tparam Strategy \tparam_strategy{Touches}
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\param geometry1 \param_geometry
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\param geometry2 \param_geometry
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\param strategy \param_strategy{touches}
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\return \return_check2{touch each other}
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\qbk{distinguish,with strategy}
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\qbk{[include reference/algorithms/touches.qbk]}
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*/
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template <typename Geometry1, typename Geometry2, typename Strategy>
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inline bool touches(Geometry1 const& geometry1,
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Geometry2 const& geometry2,
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Strategy const& strategy)
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{
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return resolve_dynamic::touches
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<
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Geometry1, Geometry2
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>::apply(geometry1, geometry2, strategy);
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}
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_TOUCHES_INTERFACE_HPP
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