FM / algorithms

/usr/include/boost/geometry/algorithms

Name	Size	Mode	Actions
detail/	-	0755	rm
dispatch/	-	0755	rm
append.hpp	11493	0644	edit dl rm
area.hpp	10657	0644	edit dl rm
assign.hpp	10709	0644	edit dl rm
buffer.hpp	8656	0644	edit dl rm
centroid.hpp	19620	0644	edit dl rm
clear.hpp	5156	0644	edit dl rm
comparable_distance.hpp	1107	0644	edit dl rm
convert.hpp	17327	0644	edit dl rm
convex_hull.hpp	11589	0644	edit dl rm
correct.hpp	9956	0644	edit dl rm
correct_closure.hpp	5862	0644	edit dl rm
covered_by.hpp	1077	0644	edit dl rm
crosses.hpp	8478	0644	edit dl rm
densify.hpp	12472	0644	edit dl rm
difference.hpp	16591	0644	edit dl rm
discrete_frechet_distance.hpp	7844	0644	edit dl rm
discrete_hausdorff_distance.hpp	11281	0644	edit dl rm
disjoint.hpp	1191	0644	edit dl rm
distance.hpp	1110	0644	edit dl rm
envelope.hpp	1021	0644	edit dl rm
equals.hpp	1196	0644	edit dl rm
expand.hpp	1073	0644	edit dl rm
for_each.hpp	9831	0644	edit dl rm
intersection.hpp	806	0644	edit dl rm
intersects.hpp	1145	0644	edit dl rm
is_convex.hpp	6508	0644	edit dl rm
is_empty.hpp	4853	0644	edit dl rm
is_simple.hpp	575	0644	edit dl rm
is_valid.hpp	570	0644	edit dl rm
length.hpp	9341	0644	edit dl rm
line_interpolate.hpp	13054	0644	edit dl rm
make.hpp	5170	0644	edit dl rm
not_implemented.hpp	3839	0644	edit dl rm
num_geometries.hpp	3586	0644	edit dl rm
num_interior_rings.hpp	3756	0644	edit dl rm
num_points.hpp	5565	0644	edit dl rm
num_segments.hpp	4775	0644	edit dl rm
overlaps.hpp	1067	0644	edit dl rm
perimeter.hpp	7212	0644	edit dl rm
point_on_surface.hpp	13281	0644	edit dl rm
relate.hpp	642	0644	edit dl rm
relation.hpp	652	0644	edit dl rm
remove_spikes.hpp	9753	0644	edit dl rm
reverse.hpp	4386	0644	edit dl rm
simplify.hpp	22696	0644	edit dl rm
sym_difference.hpp	23169	0644	edit dl rm
touches.hpp	1127	0644	edit dl rm
transform.hpp	14105	0644	edit dl rm
union.hpp	21383	0644	edit dl rm
unique.hpp	4682	0644	edit dl rm
validity_failure_type.hpp	3684	0644	edit dl rm
within.hpp	1057	0644	edit dl rm

Edit: /usr/include/boost/geometry/algorithms/buffer.hpp (8656B)

// Boost.Geometry (aka GGL, Generic Geometry Library)

// This file was modified by Oracle on 2017, 2019.
// Modifications copyright (c) 2017, 2019 Oracle and/or its affiliates.
// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle

// 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_ALGORITHMS_BUFFER_HPP
#define BOOST_GEOMETRY_ALGORITHMS_BUFFER_HPP

#include <cstddef>

#include <boost/numeric/conversion/cast.hpp>

#include <boost/range.hpp>

#include <boost/variant/apply_visitor.hpp>
#include <boost/variant/static_visitor.hpp>
#include <boost/variant/variant_fwd.hpp>

#include <boost/geometry/algorithms/clear.hpp>
#include <boost/geometry/algorithms/envelope.hpp>
#include <boost/geometry/algorithms/is_empty.hpp>
#include <boost/geometry/algorithms/not_implemented.hpp>
#include <boost/geometry/arithmetic/arithmetic.hpp>
#include <boost/geometry/geometries/concepts/check.hpp>
#include <boost/geometry/geometries/box.hpp>
#include <boost/geometry/util/math.hpp>

#include <boost/geometry/algorithms/detail/buffer/buffer_box.hpp>
#include <boost/geometry/algorithms/detail/buffer/buffer_inserter.hpp>

namespace boost { namespace geometry
{

#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{

template
<
    typename Input,
    typename Output,
    typename TagIn = typename tag<Input>::type,
    typename TagOut = typename tag<Output>::type
>
struct buffer: not_implemented<TagIn, TagOut>
{};

template <typename BoxIn, typename BoxOut>
struct buffer<BoxIn, BoxOut, box_tag, box_tag>
{
    template <typename Distance>
    static inline void apply(BoxIn const& box_in, Distance const& distance,
                Distance const& , BoxOut& box_out)
    {
        detail::buffer::buffer_box(box_in, distance, box_out);
    }
};

} // namespace dispatch
#endif // DOXYGEN_NO_DISPATCH

namespace resolve_variant {

template <typename Geometry>
struct buffer
{
    template <typename Distance, typename GeometryOut>
    static inline void apply(Geometry const& geometry,
                             Distance const& distance,
                             Distance const& chord_length,
                             GeometryOut& out)
    {
        dispatch::buffer<Geometry, GeometryOut>::apply(geometry, distance, chord_length, out);
    }
};

template <BOOST_VARIANT_ENUM_PARAMS(typename T)>
struct buffer<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
{
    template <typename Distance, typename GeometryOut>
    struct visitor: boost::static_visitor<void>
    {
        Distance const& m_distance;
        Distance const& m_chord_length;
        GeometryOut& m_out;

visitor(Distance const& distance,
                Distance const& chord_length,
                GeometryOut& out)
        : m_distance(distance),
          m_chord_length(chord_length),
          m_out(out)
        {}

template <typename Geometry>
        void operator()(Geometry const& geometry) const
        {
            buffer<Geometry>::apply(geometry, m_distance, m_chord_length, m_out);
        }
    };

template <typename Distance, typename GeometryOut>
    static inline void apply(
        boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry,
        Distance const& distance,
        Distance const& chord_length,
        GeometryOut& out
    )
    {
        boost::apply_visitor(visitor<Distance, GeometryOut>(distance, chord_length, out), geometry);
    }
};

} // namespace resolve_variant

/*!
\brief \brief_calc{buffer}
\ingroup buffer
\details \details_calc{buffer, \det_buffer}.
\tparam Input \tparam_geometry
\tparam Output \tparam_geometry
\tparam Distance \tparam_numeric
\param geometry_in \param_geometry
\param geometry_out \param_geometry
\param distance The distance to be used for the buffer
\param chord_length (optional) The length of the chord's in the generated arcs around points or bends

\qbk{[include reference/algorithms/buffer.qbk]}
 */
template <typename Input, typename Output, typename Distance>
inline void buffer(Input const& geometry_in, Output& geometry_out,
            Distance const& distance, Distance const& chord_length = -1)
{
    concepts::check<Input const>();
    concepts::check<Output>();

resolve_variant::buffer<Input>::apply(geometry_in, distance, chord_length, geometry_out);
}

/*!
\brief \brief_calc{buffer}
\ingroup buffer
\details \details_calc{return_buffer, \det_buffer}. \details_return{buffer}.
\tparam Input \tparam_geometry
\tparam Output \tparam_geometry
\tparam Distance \tparam_numeric
\param geometry \param_geometry
\param distance The distance to be used for the buffer
\param chord_length (optional) The length of the chord's in the generated arcs
    around points or bends (RESERVED, NOT YET USED)
\return \return_calc{buffer}
 */
template <typename Output, typename Input, typename Distance>
Output return_buffer(Input const& geometry, Distance const& distance, Distance const& chord_length = -1)
{
    concepts::check<Input const>();
    concepts::check<Output>();

Output geometry_out;

resolve_variant::buffer<Input>::apply(geometry, distance, chord_length, geometry_out);

return geometry_out;
}

/*!
\brief \brief_calc{buffer}
\ingroup buffer
\details \details_calc{buffer, \det_buffer}.
\tparam GeometryIn \tparam_geometry
\tparam MultiPolygon \tparam_geometry{MultiPolygon}
\tparam DistanceStrategy A strategy defining distance (or radius)
\tparam SideStrategy A strategy defining creation along sides
\tparam JoinStrategy A strategy defining creation around convex corners
\tparam EndStrategy A strategy defining creation at linestring ends
\tparam PointStrategy A strategy defining creation around points
\param geometry_in \param_geometry
\param geometry_out output multi polygon (or std:: collection of polygons),
    will contain a buffered version of the input geometry
\param distance_strategy The distance strategy to be used
\param side_strategy The side strategy to be used
\param join_strategy The join strategy to be used
\param end_strategy The end strategy to be used
\param point_strategy The point strategy to be used

\qbk{distinguish,with strategies}
\qbk{[include reference/algorithms/buffer_with_strategies.qbk]}
 */
template
<
    typename GeometryIn,
    typename MultiPolygon,
    typename DistanceStrategy,
    typename SideStrategy,
    typename JoinStrategy,
    typename EndStrategy,
    typename PointStrategy
>
inline void buffer(GeometryIn const& geometry_in,
                MultiPolygon& geometry_out,
                DistanceStrategy const& distance_strategy,
                SideStrategy const& side_strategy,
                JoinStrategy const& join_strategy,
                EndStrategy const& end_strategy,
                PointStrategy const& point_strategy)
{
    typedef typename boost::range_value<MultiPolygon>::type polygon_type;
    concepts::check<GeometryIn const>();
    concepts::check<polygon_type>();

typedef typename point_type<GeometryIn>::type point_type;
    typedef typename rescale_policy_type
        <
            point_type,
            typename geometry::cs_tag<point_type>::type
        >::type rescale_policy_type;

geometry_out.clear();

if (geometry::is_empty(geometry_in))
    {
        // Then output geometry is kept empty as well
        return;
    }

model::box<point_type> box;
    geometry::envelope(geometry_in, box);
    geometry::buffer(box, box, distance_strategy.max_distance(join_strategy, end_strategy));

typename strategy::intersection::services::default_strategy
        <
            typename cs_tag<GeometryIn>::type
        >::type intersection_strategy;

rescale_policy_type rescale_policy
            = boost::geometry::get_rescale_policy<rescale_policy_type>(
                box, intersection_strategy);

detail::buffer::buffer_inserter<polygon_type>(geometry_in, range::back_inserter(geometry_out),
                distance_strategy,
                side_strategy,
                join_strategy,
                end_strategy,
                point_strategy,
                intersection_strategy,
                rescale_policy);
}

}} // namespace boost::geometry

#endif // BOOST_GEOMETRY_ALGORITHMS_BUFFER_HPP

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