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61 lines
2.6 KiB
61 lines
2.6 KiB
5 months ago
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// Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License, version 2.0,
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// as published by the Free Software Foundation.
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//
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// This program is also distributed with certain software (including
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// but not limited to OpenSSL) that is licensed under separate terms,
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// as designated in a particular file or component or in included license
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// documentation. The authors of MySQL hereby grant you an additional
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// permission to link the program and your derivative works with the
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// separately licensed software that they have included with MySQL.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License, version 2.0, for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/// @file
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///
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/// Interface for determining the aproximate distance between two geometries by
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/// assuming the world is a sphere.
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#ifndef SQL_GIS_DISTANCE_SPHERE_H_INCLUDED
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#define SQL_GIS_DISTANCE_SPHERE_H_INCLUDED
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#include "sql/dd/types/spatial_reference_system.h" // dd::Spatial_reference_system
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#include "sql/gis/geometries.h" // gis::Geometry
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namespace gis {
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/// Compute the approximate distance between two geometries by assuming the
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/// world is a sphere.
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///
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/// The coordinate system of the geometries must match the coordinate system of
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/// the SRID. It is the caller's responsibility to guarantee this.
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///
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/// @param[in] srs The spatial reference system.
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/// @param[in] g1 Geometry 1.
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/// @param[in] g2 Geometry 2.
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/// @param[in] func_name Function name used in error reporting.
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/// @param[in] sphere_radius Radius of sphere.
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/// @param[out] result Distance between g1 and g2. Invalid if `result_null`.
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/// @param[out] result_null Whether return value is `NULL` instead of `result`.
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///
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/// @retval false Success.
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/// @retval true An error has occurred. The error has been reported with
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/// my_error().
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bool distance_sphere(const dd::Spatial_reference_system *srs,
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const Geometry *g1, const Geometry *g2,
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const char *func_name, double sphere_radius,
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double *result, bool *result_null) noexcept;
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} // namespace gis
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#endif // include guard
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