| 1 | /// @ref gtx_polar_coordinates |
| 2 | |
| 3 | namespace glm |
| 4 | { |
| 5 | template<typename T, qualifier Q> |
| 6 | GLM_FUNC_QUALIFIER vec<3, T, Q> polar |
| 7 | ( |
| 8 | vec<3, T, Q> const& euclidean |
| 9 | ) |
| 10 | { |
| 11 | T const Length(length(euclidean)); |
| 12 | vec<3, T, Q> const tmp(euclidean / Length); |
| 13 | T const xz_dist(sqrt(tmp.x * tmp.x + tmp.z * tmp.z)); |
| 14 | |
| 15 | return vec<3, T, Q>( |
| 16 | asin(tmp.y), // latitude |
| 17 | atan(tmp.x, tmp.z), // longitude |
| 18 | xz_dist); // xz distance |
| 19 | } |
| 20 | |
| 21 | template<typename T, qualifier Q> |
| 22 | GLM_FUNC_QUALIFIER vec<3, T, Q> euclidean |
| 23 | ( |
| 24 | vec<2, T, Q> const& polar |
| 25 | ) |
| 26 | { |
| 27 | T const latitude(polar.x); |
| 28 | T const longitude(polar.y); |
| 29 | |
| 30 | return vec<3, T, Q>( |
| 31 | cos(latitude) * sin(longitude), |
| 32 | sin(latitude), |
| 33 | cos(latitude) * cos(longitude)); |
| 34 | } |
| 35 | |
| 36 | }//namespace glm |