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55 lines
1.5 KiB
55 lines
1.5 KiB
///////////////////////////////////////////////////////////////////////////////////////////////////
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// OpenGL Mathematics Copyright (c) 2005 - 2013 G-Truc Creation (www.g-truc.net)
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Created : 2007-03-06
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// Updated : 2009-05-01
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// Licence : This source is under MIT License
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// File : glm/gtx/polar_coordinates.inl
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///////////////////////////////////////////////////////////////////////////////////////////////////
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namespace glm
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{
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template <typename T>
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GLM_FUNC_QUALIFIER detail::tvec3<T> polar
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(
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detail::tvec3<T> const & euclidean
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)
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{
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T const Length(length(euclidean));
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detail::tvec3<T> const tmp(euclidean / Length);
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T const xz_dist(sqrt(tmp.x * tmp.x + tmp.z * tmp.z));
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#ifdef GLM_FORCE_RADIANS
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return detail::tvec3<T>(
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atan(xz_dist, tmp.y), // latitude
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atan(tmp.x, tmp.z), // longitude
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xz_dist); // xz distance
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#else
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return detail::tvec3<T>(
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degrees(atan(xz_dist, tmp.y)), // latitude
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degrees(atan(tmp.x, tmp.z)), // longitude
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xz_dist); // xz distance
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#endif
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}
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template <typename T>
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GLM_FUNC_QUALIFIER detail::tvec3<T> euclidean
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(
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detail::tvec2<T> const & polar
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)
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{
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#ifdef GLM_FORCE_RADIANS
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T const latitude(polar.x);
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T const longitude(polar.y);
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#else
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T const latitude(radians(polar.x));
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T const longitude(radians(polar.y));
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#endif
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return detail::tvec3<T>(
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cos(latitude) * sin(longitude),
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sin(latitude),
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cos(latitude) * cos(longitude));
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}
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}//namespace glm
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