| /// @ref gtx_vector_angle |
| /// @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"); |
| return acos(clamp(dot(x, y), genType(-1), genType(1))); |
| } |
| |
| 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"); |
| return acos(clamp(dot(x, y), T(-1), T(1))); |
| } |
| |
| //! \todo epsilon is hard coded to 0.01 |
| template <typename T, precision P> |
| GLM_FUNC_QUALIFIER T orientedAngle |
| ( |
| tvec2<T, P> const & x, |
| tvec2<T, P> const & y |
| ) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'orientedAngle' only accept floating-point inputs"); |
| T const Angle(acos(clamp(dot(x, y), T(-1), T(1)))); |
| |
| if(all(epsilonEqual(y, glm::rotate(x, Angle), T(0.0001)))) |
| return Angle; |
| else |
| return -Angle; |
| } |
| |
| template <typename T, precision P> |
| GLM_FUNC_QUALIFIER T orientedAngle |
| ( |
| tvec3<T, P> const & x, |
| tvec3<T, P> const & y, |
| tvec3<T, P> const & ref |
| ) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'orientedAngle' only accept floating-point inputs"); |
| |
| T const Angle(acos(clamp(dot(x, y), T(-1), T(1)))); |
| return mix(Angle, -Angle, dot(ref, cross(x, y)) < T(0)); |
| } |
| }//namespace glm |