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Refactored code such that non-cs-specific code is moved to policies
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include/boost/geometry/extensions/random/policies/uniform_box.hpp
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| // Boost.Geometry (aka GGL, Generic Geometry Library) | ||
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| // Copyright (c) 2020 Tinko Bartels, Berlin, Germany. | ||
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| // Contributed and/or modified by Tinko Bartels, | ||
| // as part of Google Summer of Code 2019 program. | ||
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| // 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) | ||
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| #ifndef BOOST_GEOMETRY_EXTENSIONS_RANDOM_POLICIES_UNIFORM_BOX_HPP | ||
| #define BOOST_GEOMETRY_EXTENSIONS_RANDOM_POLICIES_UNIFORM_BOX_HPP | ||
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| #include <random> | ||
| #include <array> | ||
| #include <functional> | ||
| #include <algorithm> | ||
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| #include <boost/geometry/algorithms/equals.hpp> | ||
| #include <boost/geometry/algorithms/transform.hpp> | ||
| #include <boost/geometry/algorithms/within.hpp> | ||
| #include <boost/geometry/geometries/box.hpp> | ||
| #include <boost/geometry/core/point_type.hpp> | ||
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| #include <boost/geometry/extensions/random/policies/uniform_default_policy.hpp> | ||
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| #include <boost/geometry/extensions/random/strategies/cartesian/uniform_point_distribution_box.hpp> | ||
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| namespace boost { namespace geometry | ||
| { | ||
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| namespace policy { namespace uniform_point_distribution | ||
| { | ||
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| template | ||
| < | ||
| typename Point, | ||
| typename DomainGeometry, | ||
| typename BoxStrategy = void, | ||
| typename CalculationType = void | ||
| > | ||
| struct box | ||
| { | ||
| private: | ||
| typedef typename boost::mpl::if_ | ||
| < | ||
| boost::is_void<BoxStrategy>, | ||
| typename boost::geometry::strategy::uniform_point_distribution::services:: | ||
| default_box_strategy | ||
| < | ||
| Point, | ||
| DomainGeometry | ||
| >::type, | ||
| BoxStrategy | ||
| >::type box_strategy; | ||
| typedef typename boost::mpl::if_ | ||
| < | ||
| boost::is_void<CalculationType>, | ||
| typename select_most_precise | ||
| < | ||
| typename coordinate_type<Point>::type, | ||
| double | ||
| >::type, | ||
| CalculationType | ||
| >::type ct; | ||
| box_strategy m_box_strategy; | ||
| public: | ||
| box(DomainGeometry const& d, box_strategy const& b = box_strategy()) : m_box_strategy(b) {} | ||
| bool equals(DomainGeometry const& l_domain, | ||
| DomainGeometry const& r_domain, | ||
| box const& r_policy) const | ||
| { | ||
| return boost::geometry::equals(l_domain, r_domain); | ||
| } | ||
| template<typename Generator> | ||
| Point apply(Generator& g, DomainGeometry const& d) | ||
| { | ||
| typedef typename point_type<DomainGeometry>::type domain_point; | ||
| domain_point p; | ||
| std::array<ct, dimension<DomainGeometry>::value> fractions; | ||
| std::uniform_real_distribution<ct> dist(0, 1); | ||
| std::generate(fractions.begin(), fractions.end(), std::bind(dist, std::ref(g))); | ||
| p = m_box_strategy.template apply<>(d, fractions); | ||
| Point r; | ||
| boost::geometry::transform(p, r); | ||
| return r; | ||
| } | ||
| void reset(DomainGeometry const&) {}; | ||
| }; | ||
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| namespace services | ||
| { | ||
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| template | ||
| < | ||
| typename Point, | ||
| typename DomainGeometry, | ||
| int Dim, | ||
| typename CsTag | ||
| > | ||
| struct default_policy | ||
| < | ||
| Point, | ||
| DomainGeometry, | ||
| box_tag, | ||
| single_tag, | ||
| Dim, | ||
| CsTag | ||
| > | ||
| { | ||
| typedef box<Point, DomainGeometry> type; | ||
| }; | ||
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| } // namespace services | ||
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| }} // namespace policy::uniform_point_distribution | ||
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| }} // namespace boost::geometry | ||
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| #endif // BOOST_GEOMETRY_EXTENSIONS_RANDOM_POLICIES_UNIFORM_BOX_HPP |
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include/boost/geometry/extensions/random/policies/uniform_convex_hull_rejection.hpp
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| @@ -0,0 +1,129 @@ | ||
| // Boost.Geometry (aka GGL, Generic Geometry Library) | ||
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| // Copyright (c) 2020 Tinko Bartels, Berlin, Germany. | ||
|
|
||
| // Contributed and/or modified by Tinko Bartels, | ||
| // as part of Google Summer of Code 2019 program. | ||
|
|
||
| // 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) | ||
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| #ifndef BOOST_GEOMETRY_EXTENSIONS_RANDOM_POLICIES_UNIFORM_CONVEX_HULL_REJECTION_HPP | ||
| #define BOOST_GEOMETRY_EXTENSIONS_RANDOM_POLICIES_UNIFORM_CONVEX_HULL_REJECTION_HPP | ||
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| #include <random> | ||
| #include <vector> | ||
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| #include <boost/geometry/algorithms/equals.hpp> | ||
| #include <boost/geometry/algorithms/transform.hpp> | ||
| #include <boost/geometry/algorithms/within.hpp> | ||
| #include <boost/geometry/geometries/polygon.hpp> | ||
| #include <boost/geometry/algorithms/convex_hull.hpp> | ||
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| #include <boost/geometry/strategies/cartesian/area.hpp> | ||
| #include <boost/geometry/strategies/geographic/area.hpp> | ||
| #include <boost/geometry/strategies/spherical/area.hpp> | ||
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| #include <boost/geometry/strategies/cartesian/point_in_poly_winding.hpp> | ||
| #include <boost/geometry/strategies/spherical/point_in_poly_winding.hpp> | ||
| #include <boost/geometry/strategies/geographic/point_in_poly_winding.hpp> | ||
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| #include <boost/geometry/extensions/random/strategies/cartesian/uniform_point_distribution_triangle.hpp> | ||
| #include <boost/geometry/extensions/random/policies/uniform_convex_polygon.hpp> | ||
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| namespace boost { namespace geometry | ||
| { | ||
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| namespace policy { namespace uniform_point_distribution | ||
| { | ||
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| // The following strategy is suitable for geometries for which | ||
| // a Triangle sampling strategy can be provided | ||
| // a SideStrategy that computes the triangle area can be provided. | ||
| template | ||
| < | ||
| typename Point, | ||
| typename DomainGeometry, | ||
| typename TriangleStrategy = void, | ||
| typename AreaStrategy = void, | ||
| // typename ConvexHullStrategy | ||
| typename WithinStrategy = void | ||
| > | ||
| struct convex_hull_rejection | ||
| { | ||
| private: | ||
| typedef typename boost::mpl::if_ | ||
| < | ||
| boost::is_void<TriangleStrategy>, | ||
| typename boost::geometry::strategy::uniform_point_distribution::services | ||
| ::default_triangle_strategy | ||
| < | ||
| Point, typename point_type<DomainGeometry>::type | ||
| >::type, | ||
| TriangleStrategy | ||
| >::type triangle_strategy; | ||
| typedef typename boost::mpl::if_ | ||
| < | ||
| boost::is_void<AreaStrategy>, | ||
| typename boost::geometry::strategy::area::services::default_strategy | ||
| < | ||
| typename cs_tag<DomainGeometry>::type | ||
| >::type, | ||
| AreaStrategy | ||
| >::type area_strategy; | ||
| typedef typename boost::mpl::if_ | ||
| < | ||
| boost::is_void<WithinStrategy>, | ||
| typename boost::geometry::strategy::within::services::default_strategy | ||
| < | ||
| Point, | ||
| DomainGeometry | ||
| >::type, | ||
| WithinStrategy | ||
| >::type within_strategy; | ||
| typedef typename point_type<DomainGeometry>::type domain_point_type; | ||
| typedef boost::geometry::model::ring<domain_point_type> ring; | ||
| ring m_hull; | ||
| convex_polygon<Point, ring, triangle_strategy, area_strategy> m_policy; | ||
| within_strategy m_within_strategy; | ||
| public: | ||
| convex_hull_rejection(DomainGeometry const& d, | ||
| triangle_strategy const& t = triangle_strategy(), | ||
| area_strategy const& a = area_strategy(), | ||
| within_strategy const& w = within_strategy()) : m_within_strategy(w) | ||
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| { | ||
| boost::geometry::convex_hull(d, m_hull); | ||
| m_policy = convex_polygon | ||
| < | ||
| Point, | ||
| ring, | ||
| triangle_strategy, | ||
| area_strategy | ||
| >(m_hull, t, a); | ||
| } | ||
| bool equals(DomainGeometry const& l_domain, | ||
| DomainGeometry const& r_domain, | ||
| convex_hull_rejection const& r_policy) const | ||
| { | ||
| return boost::geometry::equals(l_domain, r_domain) | ||
| && m_policy.equals(l_domain, r_domain, r_policy.m_policy); | ||
| } | ||
| template<typename Generator> | ||
| Point apply(Generator& g, DomainGeometry const& d) | ||
| { | ||
| Point p; | ||
| do { | ||
| p = m_policy.apply(g, m_hull); | ||
| } while( !boost::geometry::within(p, d, m_within_strategy) ); | ||
| return p; | ||
| } | ||
| void reset(DomainGeometry const&) {}; | ||
| }; | ||
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| }} // namespace policy::uniform_point_distribution | ||
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| }} // namespace boost::geometry | ||
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| #endif // BOOST_GEOMETRY_EXTENSIONS_RANDOM_STRATEGIES_AGNOSTIC_UNIFORM_CONVEX_HULL_REJECTION_HPP |
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