/usr/include/boost/geometry/algorithms/envelope.hpp is in libboost1.55-dev 1.55.0+dfsg-3.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 | // 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_ENVELOPE_HPP
#define BOOST_GEOMETRY_ALGORITHMS_ENVELOPE_HPP
#include <boost/range.hpp>
#include <boost/numeric/conversion/cast.hpp>
#include <boost/geometry/algorithms/assign.hpp>
#include <boost/geometry/algorithms/expand.hpp>
#include <boost/geometry/algorithms/not_implemented.hpp>
#include <boost/geometry/core/cs.hpp>
#include <boost/geometry/core/exterior_ring.hpp>
#include <boost/geometry/geometries/concepts/check.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace envelope
{
/// Calculate envelope of an 2D or 3D segment
struct envelope_expand_one
{
template<typename Geometry, typename Box>
static inline void apply(Geometry const& geometry, Box& mbr)
{
assign_inverse(mbr);
geometry::expand(mbr, geometry);
}
};
/// Iterate through range (also used in multi*)
template<typename Range, typename Box>
inline void envelope_range_additional(Range const& range, Box& mbr)
{
typedef typename boost::range_iterator<Range const>::type iterator_type;
for (iterator_type it = boost::begin(range);
it != boost::end(range);
++it)
{
geometry::expand(mbr, *it);
}
}
/// Generic range dispatching struct
struct envelope_range
{
/// Calculate envelope of range using a strategy
template <typename Range, typename Box>
static inline void apply(Range const& range, Box& mbr)
{
assign_inverse(mbr);
envelope_range_additional(range, mbr);
}
};
}} // namespace detail::envelope
#endif // DOXYGEN_NO_DETAIL
#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{
template
<
typename Geometry,
typename Tag = typename tag<Geometry>::type
>
struct envelope: not_implemented<Tag>
{};
template <typename Point>
struct envelope<Point, point_tag>
: detail::envelope::envelope_expand_one
{};
template <typename Box>
struct envelope<Box, box_tag>
: detail::envelope::envelope_expand_one
{};
template <typename Segment>
struct envelope<Segment, segment_tag>
: detail::envelope::envelope_expand_one
{};
template <typename Linestring>
struct envelope<Linestring, linestring_tag>
: detail::envelope::envelope_range
{};
template <typename Ring>
struct envelope<Ring, ring_tag>
: detail::envelope::envelope_range
{};
template <typename Polygon>
struct envelope<Polygon, polygon_tag>
: detail::envelope::envelope_range
{
template <typename Box>
static inline void apply(Polygon const& poly, Box& mbr)
{
// For polygon, inspecting outer ring is sufficient
detail::envelope::envelope_range::apply(exterior_ring(poly), mbr);
}
};
} // namespace dispatch
#endif
/*!
\brief \brief_calc{envelope}
\ingroup envelope
\details \details_calc{envelope,\det_envelope}.
\tparam Geometry \tparam_geometry
\tparam Box \tparam_box
\param geometry \param_geometry
\param mbr \param_box \param_set{envelope}
\qbk{[include reference/algorithms/envelope.qbk]}
\qbk{
[heading Example]
[envelope] [envelope_output]
}
*/
template<typename Geometry, typename Box>
inline void envelope(Geometry const& geometry, Box& mbr)
{
concept::check<Geometry const>();
concept::check<Box>();
dispatch::envelope<Geometry>::apply(geometry, mbr);
}
/*!
\brief \brief_calc{envelope}
\ingroup envelope
\details \details_calc{return_envelope,\det_envelope}. \details_return{envelope}
\tparam Box \tparam_box
\tparam Geometry \tparam_geometry
\param geometry \param_geometry
\return \return_calc{envelope}
\qbk{[include reference/algorithms/envelope.qbk]}
\qbk{
[heading Example]
[return_envelope] [return_envelope_output]
}
*/
template<typename Box, typename Geometry>
inline Box return_envelope(Geometry const& geometry)
{
concept::check<Geometry const>();
concept::check<Box>();
Box mbr;
dispatch::envelope<Geometry>::apply(geometry, mbr);
return mbr;
}
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_ENVELOPE_HPP
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