124 lines
3.6 KiB
C++
124 lines
3.6 KiB
C++
// Boost.Geometry
|
|
|
|
// Copyright (c) 2021, Oracle and/or its affiliates.
|
|
|
|
// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
|
|
|
|
// Licensed under the Boost Software License version 1.0.
|
|
// http://www.boost.org/users/license.html
|
|
|
|
#ifndef BOOST_GEOMETRY_STRATEGIES_CENTROID_CARTESIAN_HPP
|
|
#define BOOST_GEOMETRY_STRATEGIES_CENTROID_CARTESIAN_HPP
|
|
|
|
|
|
#include <boost/geometry/strategies/cartesian/centroid_average.hpp>
|
|
#include <boost/geometry/strategies/cartesian/centroid_bashein_detmer.hpp>
|
|
#include <boost/geometry/strategies/cartesian/centroid_weighted_length.hpp>
|
|
|
|
#include <boost/geometry/strategies/detail.hpp>
|
|
#include <boost/geometry/strategies/centroid/services.hpp>
|
|
|
|
#include <boost/geometry/util/type_traits.hpp>
|
|
|
|
|
|
namespace boost { namespace geometry
|
|
{
|
|
|
|
namespace strategies { namespace centroid
|
|
{
|
|
|
|
template <typename CalculationType = void>
|
|
struct cartesian
|
|
: public strategies::detail::cartesian_base
|
|
{
|
|
template <typename Geometry>
|
|
static auto centroid(Geometry const&,
|
|
std::enable_if_t
|
|
<
|
|
util::is_pointlike<Geometry>::value
|
|
> * = nullptr)
|
|
{
|
|
return strategy::centroid::average<>();
|
|
}
|
|
|
|
template <typename Geometry>
|
|
static auto centroid(Geometry const&,
|
|
std::enable_if_t
|
|
<
|
|
util::is_polylinear<Geometry>::value
|
|
> * = nullptr)
|
|
{
|
|
return strategy::centroid::weighted_length<void, void, CalculationType>();
|
|
}
|
|
|
|
template <typename Geometry>
|
|
static auto centroid(Geometry const&,
|
|
std::enable_if_t
|
|
<
|
|
util::is_polygonal<Geometry>::value
|
|
// TODO: This condition was used for the legacy default strategy
|
|
// && geometry::dimension<Geometry>::value == 2
|
|
> * = nullptr)
|
|
{
|
|
return strategy::centroid::bashein_detmer<void, void, CalculationType>();
|
|
}
|
|
|
|
// TODO: Box and Segment should have proper strategies.
|
|
template <typename Geometry, typename Point>
|
|
static auto centroid(Geometry const&, Point const&,
|
|
std::enable_if_t
|
|
<
|
|
util::is_segment<Geometry>::value
|
|
|| util::is_box<Geometry>::value
|
|
> * = nullptr)
|
|
{
|
|
return strategy::centroid::not_applicable_strategy();
|
|
}
|
|
};
|
|
|
|
|
|
namespace services
|
|
{
|
|
|
|
template <typename Geometry>
|
|
struct default_strategy<Geometry, cartesian_tag>
|
|
{
|
|
using type = strategies::centroid::cartesian<>;
|
|
};
|
|
|
|
|
|
template <typename PC, typename PG>
|
|
struct strategy_converter<strategy::centroid::average<PC, PG> >
|
|
{
|
|
static auto get(strategy::centroid::average<PC, PG> const&)
|
|
{
|
|
return strategies::centroid::cartesian<>();
|
|
}
|
|
};
|
|
|
|
template <typename PC, typename PG>
|
|
struct strategy_converter<strategy::centroid::weighted_length<PC, PG> >
|
|
{
|
|
static auto get(strategy::centroid::weighted_length<PC, PG> const&)
|
|
{
|
|
return strategies::centroid::cartesian<>();
|
|
}
|
|
};
|
|
|
|
template <typename PC, typename PG, typename CT>
|
|
struct strategy_converter<strategy::centroid::bashein_detmer<PC, PG, CT> >
|
|
{
|
|
static auto get(strategy::centroid::bashein_detmer<PC, PG, CT> const&)
|
|
{
|
|
return strategies::centroid::cartesian<CT>();
|
|
}
|
|
};
|
|
|
|
} // namespace services
|
|
|
|
}} // namespace strategies::centroid
|
|
|
|
}} // namespace boost::geometry
|
|
|
|
#endif // BOOST_GEOMETRY_STRATEGIES_CENTROID_CARTESIAN_HPP
|