MySQL 8.0.30
Source Code Documentation
frechet_distance_functor.h
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1#ifndef GIS__FRECHET_DISTANCE_FUNCTOR_H_INCLUDED
2#define GIS__FRECHET_DISTANCE_FUNCTOR_H_INCLUDED
3
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25
26/// @file
27///
28/// This file declares the frechet_distance functor interface.
29///
30/// The functor is not intended for use directly by MySQL code. It should be
31/// used indirectly through the gis::frechet_distance() function.
32///
33/// @see gis::frechet_distance
34
35#include <memory> // std::unique_ptr
36
37#include <boost/geometry.hpp>
38#include "sql/gis/functor.h"
39#include "sql/gis/geometries.h"
40
41namespace gis {
42
43/// Frechet_distance functor that calls Boost.Geometry with the correct
44/// parameter types.
45///
46/// The functor throws exceptions and is therefore only intended used to
47/// implement frechet_distance or other geographic functions.
48/// It should not be used directly by other MySQL code.
49class Frechet_distance : public Functor<double> {
50 private:
51 std::unique_ptr<boost::geometry::strategy::distance::geographic<
52 boost::geometry::strategy::andoyer,
53 boost::geometry::srs::spheroid<double>>>
55
56 public:
57 Frechet_distance(double major, double minor);
58 double operator()(const Geometry *g1, const Geometry *g2) const override;
59
60 double eval(const Geometry *g1, const Geometry *g2) const;
61
62 double eval(const Geographic_linestring *g1,
63 const Geographic_linestring *g2) const;
64 double eval(const Cartesian_linestring *g1,
65 const Cartesian_linestring *g2) const;
66};
67
68} // namespace gis
69
70#endif // GIS__FRECHET_DISTANCE_FUNCTOR_H_INCLUDED
A Cartesian 2d linestring.
Definition: geometries_cs.h:70
Frechet_distance functor that calls Boost.Geometry with the correct parameter types.
Definition: frechet_distance_functor.h:49
std::unique_ptr< boost::geometry::strategy::distance::geographic< boost::geometry::strategy::andoyer, boost::geometry::srs::spheroid< double > > > m_geographic_strategy
Definition: frechet_distance_functor.h:54
double eval(const Geometry *g1, const Geometry *g2) const
Definition: frechet_distance.cc:57
Frechet_distance(double major, double minor)
Definition: frechet_distance.cc:46
double operator()(const Geometry *g1, const Geometry *g2) const override
Definition: frechet_distance.cc:52
The base class of all functors that takes two geometry arguments.
Definition: functor.h:164
A geographic (ellipsoidal) 2d linestring.
Definition: geometries_cs.h:124
Abstract superclass for all geometric objects.
Definition: geometries.h:99
This file contains the superclasses for GIS functors.
This file declares the geometry class hierarchy used by the server as the internal representation of ...
Definition: area.cc:46
std::conditional_t< !std::is_array< T >::value, std::unique_ptr< T, detail::Deleter< T > >, std::conditional_t< detail::is_unbounded_array_v< T >, std::unique_ptr< T, detail::Array_deleter< std::remove_extent_t< T > > >, void > > unique_ptr
The following is a common type that is returned by all the ut::make_unique (non-aligned) specializati...
Definition: ut0new.h:2436