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
|
// Copyright (c) 2020, 2025, Oracle and/or its affiliates.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License, version 2.0,
// as published by the Free Software Foundation.
//
// This program is designed to work with certain software (including
// but not limited to OpenSSL) that is licensed under separate terms,
// as designated in a particular file or component or in included license
// documentation. The authors of MySQL hereby grant you an additional
// permission to link the program and your derivative works with the
// separately licensed software that they have either included with
// the program or referenced in the documentation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License, version 2.0, for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
/// @file
///
/// This file implements the discrete Frechet distance functor and function.
#include <cmath> // std::isfinite
#include <boost/geometry.hpp>
#include "my_inttypes.h" // MYF
#include "my_sys.h" // my_error
#include "mysqld_error.h" // Error codes
#include "sql/dd/types/spatial_reference_system.h" // dd::Spatial_reference_system
#include "sql/gis/frechet_distance.h"
#include "sql/gis/frechet_distance_functor.h"
#include "sql/gis/gc_utils.h"
#include "sql/gis/geometries.h"
#include "sql/gis/geometries_traits.h"
#include "sql/sql_exception_handler.h" // handle_gis_exception
namespace bg = boost::geometry;
namespace bgs = boost::geometry::srs;
namespace bgsd = boost::geometry::strategy::distance;
namespace gis {
Frechet_distance::Frechet_distance(double major, double minor)
: m_geographic_strategy(
new bgsd::geographic<boost::geometry::strategy::andoyer,
bgs::spheroid<double>>(
bgs::spheroid<double>(major, minor))) {}
double Frechet_distance::operator()(const Geometry *g1,
const Geometry *g2) const {
return apply(*this, g1, g2);
}
double Frechet_distance::eval(const Geometry *g1, const Geometry *g2) const {
throw not_implemented_exception::for_non_projected(*g1, *g2);
}
double Frechet_distance::eval(const Geographic_linestring *g1,
const Geographic_linestring *g2) const {
return bg::discrete_frechet_distance(*g1, *g2, *m_geographic_strategy);
}
double Frechet_distance::eval(const Cartesian_linestring *g1,
const Cartesian_linestring *g2) const {
return bg::discrete_frechet_distance(*g1, *g2);
}
/////////////////////////////////////////////////////////////////////////////
bool frechet_distance(const dd::Spatial_reference_system *srs,
const Geometry *g1, const Geometry *g2,
const char *func_name, double *frechet_distance,
bool *is_null) noexcept {
try {
assert(g1->coordinate_system() == g2->coordinate_system());
assert(srs == nullptr ||
((srs->is_cartesian() &&
g1->coordinate_system() == Coordinate_system::kCartesian) ||
(srs->is_geographic() &&
g1->coordinate_system() == Coordinate_system::kGeographic)));
if ((*is_null = (g1->is_empty() || g2->is_empty()))) return false;
Frechet_distance fd(srs ? srs->semi_major_axis() : 0.0,
srs ? srs->semi_minor_axis() : 0.0);
*frechet_distance = fd(g1, g2);
} catch (...) {
handle_gis_exception(func_name);
return true;
}
if (!std::isfinite(*frechet_distance) || *frechet_distance < 0.0) {
my_error(ER_DATA_OUT_OF_RANGE, MYF(0), "FrechetDistance", func_name);
return true;
}
return false;
}
} // namespace gis
|
