mirror of
https://github.com/g-truc/glm.git
synced 2024-11-27 10:44:34 +00:00
96 lines
2.5 KiB
C++
96 lines
2.5 KiB
C++
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// OpenGL Mathematics Copyright (c) 2005 - 2013 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 Dot = clamp(dot(x, y), genType(0), genType(1));
|
|
|
|
#ifdef GLM_FORCE_RADIANS
|
|
return acos(Dot);
|
|
#else
|
|
return degrees(acos(Dot));
|
|
#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 Dot = clamp(dot(x, y), T(0), T(1));
|
|
|
|
#ifdef GLM_FORCE_RADIANS
|
|
return acos(Dot);
|
|
#else
|
|
return degrees(acos(Dot));
|
|
#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 Dot = clamp(dot(x, y), T(0), T(1));
|
|
|
|
#ifdef GLM_FORCE_RADIANS
|
|
T const Angle(acos(Dot));
|
|
#else
|
|
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 Dot = clamp(dot(x, y), T(0), T(1));
|
|
|
|
#ifdef GLM_FORCE_RADIANS
|
|
T const Angle(acos(Dot));
|
|
#else
|
|
T const Angle(degrees(acos(Dot)));
|
|
#endif
|
|
|
|
if(dot(ref, cross(x, y)) < T(0))
|
|
return -Angle;
|
|
else
|
|
return Angle;
|
|
}
|
|
}//namespace glm
|