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94 lines
3.1 KiB
94 lines
3.1 KiB
#ifndef SQL_GIS_MBR_UTILS_H_INCLUDED
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#define SQL_GIS_MBR_UTILS_H_INCLUDED
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// Copyright (c) 2017, 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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/// This file declares the interface of various utility functions for
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/// geometrycollections. The functions may throw exceptions.
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#include <boost/geometry.hpp>
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#include "sql/gis/box.h"
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#include "sql/gis/geometries.h"
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#include "sql/gis/geometries_cs.h"
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namespace dd {
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class Spatial_reference_system;
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} // namespace dd
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namespace gis {
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/// Checks if two MBRs are equal.
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///
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/// Empty boxes are considered equal.
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///
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/// @param[in] mbr1 First MBR.
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/// @param[in] mbr2 Second MBR.
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/// @retval true The MBRs are equal.
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/// @retval false The MBRs are not equal.
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bool mbrs_are_equal(Box const &mbr1, Box const &mbr2);
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/// Checks if an MBR is empty.
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///
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/// By default, BG box coordinates are NaN. If a geometry is empty, its box will
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/// have all NaN coordinates.
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///
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/// @param[in] mbr MBR to check.
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/// @retval true The MBR is empty.
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/// @retval false The MBR is not empty.
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bool mbr_is_empty(Box const &mbr);
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/// Checks if an MBR represents a point.
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///
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/// Boxes around points collapse so that min_corner == max_corner.
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///
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/// @param[in] mbr MBR to check.
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/// @retval true The MBR is a point.
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/// @retval false The MBR is not a point.
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bool mbr_is_point(Box const &mbr);
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/// Checks if an MBR represents a line.
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///
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/// Boxes around vertical and horizontal lines collapse so that either the
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/// minimum and maximum X coordinate or Y coordinate are equal.
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///
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/// @param[in] mbr MBR to check.
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/// @retval true The MBR is a line.
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/// @retval false The MBR is not a line.
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bool mbr_is_line(Box const &mbr);
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/// Computes the envelope of a geometry.
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///
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/// The result may be a collapsed MBR.
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///
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/// @param[in] g The geometry.
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/// @param[in] srs The spatial reference system of the geometry.
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/// @param[out] mbr The envelope.
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void box_envelope(const Geometry *g, const dd::Spatial_reference_system *srs,
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Box *mbr);
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} // namespace gis
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#endif // SQL_GIS_MBR_UTILS_H_INCLUDED
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