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- /*
- * Copyright (C) 2021 Christopher J. Howard
- *
- * This file is part of Antkeeper source code.
- *
- * Antkeeper source code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Antkeeper source code is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
- */
-
- #ifndef ANTKEEPER_GEOM_CARTESIAN_HPP
- #define ANTKEEPER_GEOM_CARTESIAN_HPP
-
- #include "utility/fundamental-types.hpp"
- #include <cmath>
-
- namespace geom {
-
- /// Functions which operate on Cartesian (rectangular) coordinates.
- namespace cartesian {
-
- /**
- * Converts Cartesian (rectangular) coordinates to spherical coordinates.
- *
- * @param v Cartesian coordinates.
- * @return Spherical coordinates, in the ISO order of radial distance, polar angle (radians), and azimuthal angle (radians).
- *
- * @see geom::coordinates::spherical
- */
- template <class T>
- math::vector3<T> to_spherical(const math::vector3<T>& v);
-
- template <class T>
- math::vector3<T> to_spherical(const math::vector3<T>& v)
- {
- const T xx_yy = v.x * v.x + v.y * v.y;
-
- return math::vector3<T>
- {
- std::sqrt(xx_yy + v.z * v.z),
- std::atan2(v.z, std::sqrt(xx_yy)),
- std::atan2(v.y, v.x)
- };
- }
-
- } // namespace cartesian
- } // namespace geom
-
- #endif // ANTKEEPER_GEOM_CARTESIAN_HPP
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