projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | // Boost.Geometry (aka GGL, Generic Geometry Library) |
| 2 | ||
| 3 | // Copyright (c) 2010-2012 Barend Gehrels, Amsterdam, the Netherlands. | |
| 4 | ||
| 5 | // Use, modification and distribution is subject to the Boost Software License, | |
| 6 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
| 7 | // http://www.boost.org/LICENSE_1_0.txt) | |
| 8 | ||
| 9 | #ifndef BOOST_GEOMETRY_GEOMETRIES_ADAPTED_BOOST_POLYGON_HOLE_ITERATOR_HPP | |
| 10 | #define BOOST_GEOMETRY_GEOMETRIES_ADAPTED_BOOST_POLYGON_HOLE_ITERATOR_HPP | |
| 11 | ||
| 12 | // Adapts Geometries from Boost.Polygon for usage in Boost.Geometry | |
| 13 | // boost::polygon::polygon_with_holes_data -> boost::geometry::polygon | |
| 14 | // hole_iterator -> returning ring_proxy's instead of normal polygon_data | |
| 15 | ||
| 16 | #include <boost/polygon/polygon.hpp> | |
| 17 | ||
| 18 | #include <boost/iterator.hpp> | |
| 19 | #include <boost/iterator/iterator_facade.hpp> | |
| 20 | ||
| 21 | ||
| 22 | namespace boost { namespace geometry | |
| 23 | { | |
| 24 | ||
| 25 | namespace adapt { namespace bp | |
| 26 | { | |
| 27 | ||
| 28 | ||
| 29 | template <typename Polygon, typename RingProxy> | |
| 30 | class hole_iterator | |
| 31 | : public ::boost::iterator_facade | |
| 32 | < | |
| 33 | hole_iterator<Polygon, RingProxy>, | |
| 34 | RingProxy, // value type | |
| 35 | boost::forward_traversal_tag, | |
| 36 | RingProxy // reference type | |
| 37 | > | |
| 38 | { | |
| 39 | public : | |
| 40 | typedef typename boost::polygon::polygon_with_holes_traits | |
| 41 | < | |
| 42 | Polygon | |
| 43 | >::iterator_holes_type ith_type; | |
| 44 | ||
| 45 | explicit inline hole_iterator(Polygon& polygon, ith_type const it) | |
| 46 | : m_polygon(polygon) | |
| 47 | , m_base(it) | |
| 48 | { | |
| 49 | } | |
| 50 | ||
| 51 | typedef std::ptrdiff_t difference_type; | |
| 52 | ||
| 53 | private: | |
| 54 | friend class boost::iterator_core_access; | |
| 55 | ||
| 56 | inline RingProxy dereference() const | |
| 57 | { | |
| 58 | return RingProxy(m_polygon, this->m_base); | |
| 59 | } | |
| 60 | ||
| 61 | inline void increment() { ++m_base; } | |
| 62 | inline void decrement() { --m_base; } | |
| 63 | inline void advance(difference_type n) | |
| 64 | { | |
| 65 | for (int i = 0; i < n; i++) | |
| 66 | { | |
| 67 | ++m_base; | |
| 68 | } | |
| 69 | } | |
| 70 | ||
| 71 | inline bool equal(hole_iterator<Polygon, RingProxy> const& other) const | |
| 72 | { | |
| 73 | return this->m_base == other.m_base; | |
| 74 | } | |
| 75 | ||
| 76 | Polygon& m_polygon; | |
| 77 | ith_type m_base; | |
| 78 | }; | |
| 79 | ||
| 80 | ||
| 81 | }}}} | |
| 82 | ||
| 83 | #endif // BOOST_GEOMETRY_GEOMETRIES_ADAPTED_BOOST_POLYGON_HOLE_ITERATOR_HPP | |
| 84 |