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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_ALGORITHMS_APPEND_HPP
#define BOOST_GEOMETRY_ALGORITHMS_APPEND_HPP
#include <boost/range.hpp>
#include <boost/geometry/core/access.hpp>
#include <boost/geometry/core/mutable_range.hpp>
#include <boost/geometry/core/point_type.hpp>
#include <boost/geometry/core/tags.hpp>
#include <boost/geometry/algorithms/num_interior_rings.hpp>
#include <boost/geometry/algorithms/detail/convert_point_to_point.hpp>
#include <boost/geometry/geometries/concepts/check.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace append
{
template <typename Geometry, typename Point>
struct append_no_action
{
static inline void apply(Geometry& , Point const& ,
int = 0, int = 0)
{
}
};
template <typename Geometry, typename Point>
struct append_point
{
static inline void apply(Geometry& geometry, Point const& point,
int = 0, int = 0)
{
typename geometry::point_type<Geometry>::type copy;
geometry::detail::conversion::convert_point_to_point(point, copy);
traits::push_back<Geometry>::apply(geometry, copy);
}
};
template <typename Geometry, typename Range>
struct append_range
{
typedef typename boost::range_value<Range>::type point_type;
static inline void apply(Geometry& geometry, Range const& range,
int = 0, int = 0)
{
for (typename boost::range_iterator<Range const>::type
it = boost::begin(range);
it != boost::end(range);
++it)
{
append_point<Geometry, point_type>::apply(geometry, *it);
}
}
};
template <typename Polygon, typename Point>
struct point_to_polygon
{
typedef typename ring_type<Polygon>::type ring_type;
static inline void apply(Polygon& polygon, Point const& point,
int ring_index, int = 0)
{
if (ring_index == -1)
{
append_point<ring_type, Point>::apply(
exterior_ring(polygon), point);
}
else if (ring_index < int(num_interior_rings(polygon)))
{
append_point<ring_type, Point>::apply(
interior_rings(polygon)[ring_index], point);
}
}
};
template <typename Polygon, typename Range>
struct range_to_polygon
{
typedef typename ring_type<Polygon>::type ring_type;
static inline void apply(Polygon& polygon, Range const& range,
int ring_index, int )
{
if (ring_index == -1)
{
append_range<ring_type, Range>::apply(
exterior_ring(polygon), range);
}
else if (ring_index < int(num_interior_rings(polygon)))
{
append_range<ring_type, Range>::apply(
interior_rings(polygon)[ring_index], range);
}
}
};
}} // namespace detail::append
#endif // DOXYGEN_NO_DETAIL
#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{
namespace splitted_dispatch
{
template <typename Tag, typename Geometry, typename Point>
struct append_point
: detail::append::append_no_action<Geometry, Point>
{};
template <typename Geometry, typename Point>
struct append_point<linestring_tag, Geometry, Point>
: detail::append::append_point<Geometry, Point>
{};
template <typename Geometry, typename Point>
struct append_point<ring_tag, Geometry, Point>
: detail::append::append_point<Geometry, Point>
{};
template <typename Polygon, typename Point>
struct append_point<polygon_tag, Polygon, Point>
: detail::append::point_to_polygon<Polygon, Point>
{};
template <typename Tag, typename Geometry, typename Range>
struct append_range
: detail::append::append_no_action<Geometry, Range>
{};
template <typename Geometry, typename Range>
struct append_range<linestring_tag, Geometry, Range>
: detail::append::append_range<Geometry, Range>
{};
template <typename Geometry, typename Range>
struct append_range<ring_tag, Geometry, Range>
: detail::append::append_range<Geometry, Range>
{};
template <typename Polygon, typename Range>
struct append_range<polygon_tag, Polygon, Range>
: detail::append::range_to_polygon<Polygon, Range>
{};
}
// Default: append a range (or linestring or ring or whatever) to any geometry
template
<
typename Geometry, typename RangeOrPoint,
typename TagRangeOrPoint = typename tag<RangeOrPoint>::type
>
struct append
: splitted_dispatch::append_range<typename tag<Geometry>::type, Geometry, RangeOrPoint>
{};
// Specialization for point to append a point to any geometry
template <typename Geometry, typename RangeOrPoint>
struct append<Geometry, RangeOrPoint, point_tag>
: splitted_dispatch::append_point<typename tag<Geometry>::type, Geometry, RangeOrPoint>
{};
} // namespace dispatch
#endif // DOXYGEN_NO_DISPATCH
/*!
\brief Appends one or more points to a linestring, ring, polygon, multi-geometry
\ingroup append
\tparam Geometry \tparam_geometry
\tparam RangeOrPoint Either a range or a point, fullfilling Boost.Range concept or Boost.Geometry Point Concept
\param geometry \param_geometry
\param range_or_point The point or range to add
\param ring_index The index of the ring in case of a polygon:
exterior ring (-1, the default) or interior ring index
\param multi_index Reserved for multi polygons or multi linestrings
\qbk{[include reference/algorithms/append.qbk]}
}
*/
template <typename Geometry, typename RangeOrPoint>
inline void append(Geometry& geometry, RangeOrPoint const& range_or_point,
int ring_index = -1, int multi_index = 0)
{
concept::check<Geometry>();
dispatch::append
<
Geometry,
RangeOrPoint
>::apply(geometry, range_or_point, ring_index, multi_index);
}
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_APPEND_HPP
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