45 lines
1.4 KiB
C++
45 lines
1.4 KiB
C++
/// @ref gtx_vector_angle
|
|
|
|
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<length_t L, typename T, qualifier Q>
|
|
GLM_FUNC_QUALIFIER T angle(vec<L, T, Q> const& x, vec<L, T, Q> 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, qualifier Q>
|
|
GLM_FUNC_QUALIFIER T orientedAngle(vec<2, T, Q> const& x, vec<2, T, Q> 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, qualifier Q>
|
|
GLM_FUNC_QUALIFIER T orientedAngle(vec<3, T, Q> const& x, vec<3, T, Q> const& y, vec<3, T, Q> 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
|