| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| // OpenGL Mathematics Copyright (c) 2005 - 2014 G-Truc Creation (www.g-truc.net) |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| // Created : 2005-12-30 |
| // Updated : 2008-09-29 |
| // Licence : This source is under MIT License |
| // File : glm/gtx/vector_angle.inl |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| namespace glm |
| { |
| template <typename genType> |
| GLM_FUNC_QUALIFIER genType angle |
| ( |
| genType const & x, |
| genType const & y |
| ) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'angle' only accept floating-point inputs"); |
| |
| genType const Angle(acos(clamp(dot(x, y), genType(-1), genType(1)))); |
| |
| #ifdef GLM_FORCE_RADIANS |
| return Angle; |
| #else |
| # pragma message("GLM: angle function returning degrees is deprecated. #define GLM_FORCE_RADIANS before including GLM headers to remove this message.") |
| return degrees(Angle); |
| #endif |
| } |
| |
| template <typename T, precision P, template <typename, precision> class vecType> |
| GLM_FUNC_QUALIFIER T angle |
| ( |
| vecType<T, P> const & x, |
| vecType<T, P> const & y |
| ) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'angle' only accept floating-point inputs"); |
| |
| T const Angle(acos(clamp(dot(x, y), T(-1), T(1)))); |
| |
| #ifdef GLM_FORCE_RADIANS |
| return Angle; |
| #else |
| # pragma message("GLM: angle function returning degrees is deprecated. #define GLM_FORCE_RADIANS before including GLM headers to remove this message.") |
| return degrees(Angle); |
| #endif |
| } |
| |
| //! \todo epsilon is hard coded to 0.01 |
| template <typename T, precision P> |
| GLM_FUNC_QUALIFIER T orientedAngle |
| ( |
| detail::tvec2<T, P> const & x, |
| detail::tvec2<T, P> const & y |
| ) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'orientedAngle' only accept floating-point inputs"); |
| |
| T const Dot = clamp(dot(x, y), T(-1), T(1)); |
| |
| #ifdef GLM_FORCE_RADIANS |
| T const Angle(acos(Dot)); |
| #else |
| # pragma message("GLM: orientedAngle function returning degrees is deprecated. #define GLM_FORCE_RADIANS before including GLM headers to remove this message.") |
| T const Angle(degrees(acos(Dot))); |
| #endif |
| detail::tvec2<T, P> const TransformedVector(glm::rotate(x, Angle)); |
| if(all(epsilonEqual(y, TransformedVector, T(0.01)))) |
| return Angle; |
| else |
| return -Angle; |
| } |
| |
| template <typename T, precision P> |
| GLM_FUNC_QUALIFIER T orientedAngle |
| ( |
| detail::tvec3<T, P> const & x, |
| detail::tvec3<T, P> const & y, |
| detail::tvec3<T, P> const & ref |
| ) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'orientedAngle' only accept floating-point inputs"); |
| |
| T const Dot = clamp(dot(x, y), T(-1), T(1)); |
| |
| #ifdef GLM_FORCE_RADIANS |
| T const Angle(acos(Dot)); |
| #else |
| # pragma message("GLM: orientedAngle function returning degrees is deprecated. #define GLM_FORCE_RADIANS before including GLM headers to remove this message.") |
| T const Angle(degrees(acos(Dot))); |
| #endif |
| |
| if(dot(ref, cross(x, y)) < T(0)) |
| return -Angle; |
| else |
| return Angle; |
| } |
| }//namespace glm |