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
|
// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.
// Copyright (c) 2008-2015 Bruno Lalande, Paris, France.
// Copyright (c) 2009-2015 Mateusz Loskot, London, UK.
// This file was modified by Oracle on 2015, 2016.
// Modifications copyright (c) 2015-2016, Oracle and/or its affiliates.
// Contributed and/or modified by Vissarion Fysikopoulos, on behalf of Oracle
// Contributed and/or modified by Menelaos Karavelas, 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.
// Distributed under 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_DETAIL_ENVELOPE_IMPLEMENTATION_HPP
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_IMPLEMENTATION_HPP
#include <boost/geometry/core/exterior_ring.hpp>
#include <boost/geometry/core/interior_rings.hpp>
#include <boost/geometry/core/tags.hpp>
#include <boost/geometry/algorithms/is_empty.hpp>
#include <boost/geometry/algorithms/detail/envelope/box.hpp>
#include <boost/geometry/algorithms/detail/envelope/linear.hpp>
#include <boost/geometry/algorithms/detail/envelope/multipoint.hpp>
#include <boost/geometry/algorithms/detail/envelope/point.hpp>
#include <boost/geometry/algorithms/detail/envelope/range.hpp>
#include <boost/geometry/algorithms/detail/envelope/segment.hpp>
#include <boost/geometry/algorithms/dispatch/envelope.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace envelope
{
struct envelope_polygon
{
template <typename Polygon, typename Box, typename Strategy>
static inline void apply(Polygon const& polygon, Box& mbr, Strategy const& strategy)
{
typename ring_return_type<Polygon const>::type ext_ring
= exterior_ring(polygon);
if (geometry::is_empty(ext_ring))
{
// if the exterior ring is empty, consider the interior rings
envelope_multi_range
<
envelope_range
>::apply(interior_rings(polygon), mbr, strategy);
}
else
{
// otherwise, consider only the exterior ring
envelope_range::apply(ext_ring, mbr, strategy);
}
}
};
}} // namespace detail::envelope
#endif // DOXYGEN_NO_DETAIL
#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{
template <typename Ring>
struct envelope<Ring, ring_tag>
: detail::envelope::envelope_range
{};
template <typename Polygon>
struct envelope<Polygon, polygon_tag>
: detail::envelope::envelope_polygon
{};
template <typename MultiPolygon>
struct envelope<MultiPolygon, multi_polygon_tag>
: detail::envelope::envelope_multi_range
<
detail::envelope::envelope_polygon
>
{};
} // namespace dispatch
#endif // DOXYGEN_NO_DISPATCH
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_IMPLEMENTATION_HPP
|
