You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and dots ('.'), can be up to 35 characters long. Letters must be lowercase.
103 lines
3.0 KiB
103 lines
3.0 KiB
// Boost.Geometry (aka GGL, Generic Geometry Library) |
|
|
|
// Copyright (c) 2007-2011 Barend Gehrels, Amsterdam, the Netherlands. |
|
// Copyright (c) 2008-2011 Bruno Lalande, Paris, France. |
|
// Copyright (c) 2009-2011 Mateusz Loskot, London, UK. |
|
|
|
// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library |
|
// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands. |
|
|
|
// 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) |
|
|
|
#ifndef BOOST_GEOMETRY_MULTI_ALGORITHMS_WITHIN_HPP |
|
#define BOOST_GEOMETRY_MULTI_ALGORITHMS_WITHIN_HPP |
|
|
|
|
|
#include <boost/range.hpp> |
|
|
|
#include <boost/geometry/algorithms/within.hpp> |
|
#include <boost/geometry/multi/core/closure.hpp> |
|
#include <boost/geometry/multi/core/point_order.hpp> |
|
#include <boost/geometry/multi/core/tags.hpp> |
|
|
|
namespace boost { namespace geometry |
|
{ |
|
|
|
#ifndef DOXYGEN_NO_DETAIL |
|
namespace detail { namespace within |
|
{ |
|
|
|
|
|
template |
|
< |
|
typename Geometry, |
|
typename MultiGeometry, |
|
typename Strategy, |
|
typename Policy |
|
> |
|
struct geometry_multi_within_code |
|
{ |
|
static inline int apply(Geometry const& geometry, |
|
MultiGeometry const& multi, |
|
Strategy const& strategy) |
|
{ |
|
for (typename boost::range_iterator<MultiGeometry const>::type it |
|
= boost::begin(multi); |
|
it != boost::end(multi); |
|
++it) |
|
{ |
|
// Geometry coding on multi: 1 (within) if within one of them; |
|
// 0 (touch) if on border of one of them |
|
int const code = Policy::apply(geometry, *it, strategy); |
|
if (code != -1) |
|
{ |
|
return code; |
|
} |
|
} |
|
return -1; |
|
} |
|
}; |
|
|
|
|
|
}} // namespace detail::within |
|
#endif // DOXYGEN_NO_DETAIL |
|
|
|
|
|
#ifndef DOXYGEN_NO_DISPATCH |
|
namespace dispatch |
|
{ |
|
|
|
template <typename Point, typename MultiPolygon, typename Strategy> |
|
struct within<point_tag, multi_polygon_tag, Point, MultiPolygon, Strategy> |
|
{ |
|
static inline bool apply(Point const& point, |
|
MultiPolygon const& multi_polygon, Strategy const& strategy) |
|
{ |
|
return detail::within::geometry_multi_within_code |
|
< |
|
Point, |
|
MultiPolygon, |
|
Strategy, |
|
detail::within::point_in_polygon |
|
< |
|
Point, |
|
typename boost::range_value<MultiPolygon>::type, |
|
order_as_direction |
|
< |
|
geometry::point_order<MultiPolygon>::value |
|
>::value, |
|
geometry::closure<MultiPolygon>::value, |
|
Strategy |
|
> |
|
>::apply(point, multi_polygon, strategy) == 1; |
|
} |
|
}; |
|
|
|
} // namespace dispatch |
|
#endif // DOXYGEN_NO_DISPATCH |
|
|
|
}} // namespace boost::geometry |
|
|
|
#endif // BOOST_GEOMETRY_MULTI_ALGORITHMS_WITHIN_HPP
|
|
|