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153 lines
3.7 KiB
153 lines
3.7 KiB
// Boost.Geometry (aka GGL, Generic Geometry Library) |
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// Copyright (c) 2007-2011 Barend Gehrels, Amsterdam, the Netherlands. |
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// Copyright (c) 2008-2011 Bruno Lalande, Paris, France. |
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// Copyright (c) 2009-2011 Mateusz Loskot, London, UK. |
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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_UNIQUE_HPP |
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#define BOOST_GEOMETRY_ALGORITHMS_UNIQUE_HPP |
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#include <algorithm> |
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#include <boost/range.hpp> |
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#include <boost/typeof/typeof.hpp> |
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#include <boost/geometry/core/interior_rings.hpp> |
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#include <boost/geometry/core/mutable_range.hpp> |
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#include <boost/geometry/geometries/concepts/check.hpp> |
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#include <boost/geometry/policies/compare.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 unique |
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{ |
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template <typename Range, typename ComparePolicy> |
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struct range_unique |
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{ |
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static inline void apply(Range& range, ComparePolicy const& policy) |
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{ |
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typename boost::range_iterator<Range>::type it |
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= std::unique |
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( |
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boost::begin(range), |
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boost::end(range), |
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policy |
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); |
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traits::resize<Range>::apply(range, it - boost::begin(range)); |
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} |
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}; |
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template <typename Polygon, typename ComparePolicy> |
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struct polygon_unique |
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{ |
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static inline void apply(Polygon& polygon, ComparePolicy const& policy) |
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{ |
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typedef typename geometry::ring_type<Polygon>::type ring_type; |
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typedef range_unique<ring_type, ComparePolicy> per_range; |
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per_range::apply(exterior_ring(polygon), policy); |
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typename interior_return_type<Polygon>::type rings |
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= interior_rings(polygon); |
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for (BOOST_AUTO_TPL(it, boost::begin(rings)); it != boost::end(rings); ++it) |
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{ |
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per_range::apply(*it, policy); |
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} |
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} |
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}; |
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}} // namespace detail::unique |
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#endif // DOXYGEN_NO_DETAIL |
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#ifndef DOXYGEN_NO_DISPATCH |
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namespace dispatch |
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{ |
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template |
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< |
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typename Tag, |
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typename Geometry, |
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typename ComparePolicy |
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> |
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struct unique |
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{ |
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static inline void apply(Geometry&, ComparePolicy const& ) |
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{} |
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}; |
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template <typename Ring, typename ComparePolicy> |
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struct unique<ring_tag, Ring, ComparePolicy> |
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: detail::unique::range_unique<Ring, ComparePolicy> |
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{}; |
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template <typename LineString, typename ComparePolicy> |
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struct unique<linestring_tag, LineString, ComparePolicy> |
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: detail::unique::range_unique<LineString, ComparePolicy> |
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{}; |
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template <typename Polygon, typename ComparePolicy> |
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struct unique<polygon_tag, Polygon, ComparePolicy> |
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: detail::unique::polygon_unique<Polygon, ComparePolicy> |
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{}; |
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} // namespace dispatch |
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#endif |
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/*! |
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\brief \brief_calc{minimal set} |
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\ingroup unique |
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\details \details_calc{unique,minimal set (where duplicate consecutive points are removed)}. |
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\tparam Geometry \tparam_geometry |
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\param geometry \param_geometry which will be made unique |
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\qbk{[include reference/algorithms/unique.qbk]} |
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*/ |
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template <typename Geometry> |
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inline void unique(Geometry& geometry) |
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{ |
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concept::check<Geometry>(); |
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// Default strategy is the default point-comparison policy |
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typedef geometry::equal_to |
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< |
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typename geometry::point_type<Geometry>::type |
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> policy; |
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dispatch::unique |
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< |
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typename tag<Geometry>::type, |
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Geometry, |
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policy |
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>::apply(geometry, policy()); |
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} |
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}} // namespace boost::geometry |
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#endif // BOOST_GEOMETRY_ALGORITHMS_UNIQUE_HPP
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