MySQL  8.0.28
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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 
41 namespace 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.
49 class 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:2430