104 lines
3.0 KiB
C++
104 lines
3.0 KiB
C++
// 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
|