0.9.9/api/a00188_source.html

 #pragma once


 // Dependency:

 #include "../glm.hpp"

 #include "../gtc/epsilon.hpp"

 #include "../gtx/quaternion.hpp"

 #include "../gtx/rotate_vector.hpp"


 #if GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)

 #       ifndef GLM_ENABLE_EXPERIMENTAL

 #               pragma message("GLM: GLM_GTX_vector_angle is an experimental extension and may change in the future. Use #define GLM_ENABLE_EXPERIMENTAL before including it, if you really want to use it.")

 #       else

 #               pragma message("GLM: GLM_GTX_vector_angle extension included")

 #       endif

 #endif


 namespace glm

 {


         template<length_t L, typename T, qualifier Q>

         GLM_FUNC_DECL T angle(vec<L, T, Q> const& x, vec<L, T, Q> const& y);


         template<typename T, qualifier Q>

         GLM_FUNC_DECL T orientedAngle(vec<2, T, Q> const& x, vec<2, T, Q> const& y);


         template<typename T, qualifier Q>

         GLM_FUNC_DECL T orientedAngle(vec<3, T, Q> const& x, vec<3, T, Q> const& y, vec<3, T, Q> const& ref);


 }// namespace glm


 #include "vector_angle.inl"

glm::orientedAngle
GLM_FUNC_DECL T orientedAngle(vec< 3, T, Q > const &x, vec< 3, T, Q > const &y, vec< 3, T, Q > const &ref)
Returns the oriented angle between two 3d vectors based from a reference axis.

glm::angle
GLM_FUNC_DECL T angle(vec< L, T, Q > const &x, vec< L, T, Q > const &y)
Returns the absolute angle between two vectors.

glm
Definition: common.hpp:20