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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
// Copyright (c) 2009-2012 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_STRATEGIES_AGNOSTIC_POINT_IN_BOX_BY_SIDE_HPP
#define BOOST_GEOMETRY_STRATEGIES_AGNOSTIC_POINT_IN_BOX_BY_SIDE_HPP
#include <boost/array.hpp>
#include <boost/geometry/core/access.hpp>
#include <boost/geometry/core/coordinate_dimension.hpp>
#include <boost/geometry/algorithms/assign.hpp>
#include <boost/geometry/strategies/covered_by.hpp>
#include <boost/geometry/strategies/within.hpp>
namespace boost { namespace geometry { namespace strategy
{
namespace within
{
struct decide_within
{
static inline bool apply(int side, bool& result)
{
if (side != 1)
{
result = false;
return false;
}
return true; // continue
}
};
struct decide_covered_by
{
static inline bool apply(int side, bool& result)
{
if (side != 1)
{
result = side >= 0;
return false;
}
return true; // continue
}
};
template <typename Point, typename Box, typename Decide = decide_within>
struct point_in_box_by_side
{
typedef typename strategy::side::services::default_strategy
<
typename cs_tag<Box>::type
>::type side_strategy_type;
static inline bool apply(Point const& point, Box const& box)
{
// Create (counterclockwise) array of points, the fifth one closes it
// Every point should be on the LEFT side (=1), or ON the border (=0),
// So >= 1 or >= 0
boost::array<typename point_type<Box>::type, 5> bp;
geometry::detail::assign_box_corners_oriented<true>(box, bp);
bp[4] = bp[0];
bool result = true;
side_strategy_type strategy;
boost::ignore_unused_variable_warning(strategy);
for (int i = 1; i < 5; i++)
{
int const side = strategy.apply(point, bp[i - 1], bp[i]);
if (! Decide::apply(side, result))
{
return result;
}
}
return result;
}
};
} // namespace within
#ifndef DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
namespace within { namespace services
{
template <typename Point, typename Box>
struct default_strategy
<
point_tag, box_tag,
point_tag, areal_tag,
spherical_tag, spherical_tag,
Point, Box
>
{
typedef within::point_in_box_by_side
<
Point, Box, within::decide_within
> type;
};
}} // namespace within::services
namespace covered_by { namespace services
{
template <typename Point, typename Box>
struct default_strategy
<
point_tag, box_tag,
point_tag, areal_tag,
spherical_tag, spherical_tag,
Point, Box
>
{
typedef within::point_in_box_by_side
<
Point, Box, within::decide_covered_by
> type;
};
}} // namespace covered_by::services
#endif // DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
}}} // namespace boost::geometry::strategy
#endif // BOOST_GEOMETRY_STRATEGIES_AGNOSTIC_POINT_IN_BOX_BY_SIDE_HPP
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