distance_sphere.h

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/// @file
///
/// Interface for determining the approximate distance between two geometries by
/// assuming the world is a sphere.
 
#ifndef SQL_GIS_DISTANCE_SPHERE_H_INCLUDED
#define SQL_GIS_DISTANCE_SPHERE_H_INCLUDED
 
#include "sql/dd/types/spatial_reference_system.h"  // dd::Spatial_reference_system
#include "sql/gis/geometries.h"                     // gis::Geometry
 
namespace gis {
 
/// Compute the approximate distance between two geometries by assuming the
/// world is a sphere.
///
/// The coordinate system of the geometries must match the coordinate system of
/// the SRID. It is the caller's responsibility to guarantee this.
///
/// @param[in] srs The spatial reference system.
/// @param[in] g1 Geometry 1.
/// @param[in] g2 Geometry 2.
/// @param[in] func_name Function name used in error reporting.
/// @param[in] sphere_radius Radius of sphere.
/// @param[out] result Distance between g1 and g2. Invalid if `result_null`.
/// @param[out] result_null Whether return value is `NULL` instead of `result`.
///
/// @retval false Success.
/// @retval true An error has occurred. The error has been reported with
/// my_error().
bool distance_sphere(const dd::Spatial_reference_system *srs,
                     const Geometry *g1, const Geometry *g2,
                     const char *func_name, double sphere_radius,
                     double *result, bool *result_null) noexcept;
 
}  // namespace gis
 
#endif  // include guard