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87 lines
2.3 KiB
87 lines
2.3 KiB
/////////////////////////////////////////////////////////////////////////////////////////////////// |
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// OpenGL Mathematics Copyright (c) 2005 - 2013 G-Truc Creation (www.g-truc.net) |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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// Created : 2005-12-30 |
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// Updated : 2008-09-29 |
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// Licence : This source is under MIT License |
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// File : glm/gtx/vector_angle.inl |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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namespace glm |
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{ |
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template <typename genType> |
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GLM_FUNC_QUALIFIER genType angle |
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( |
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genType const & x, |
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genType const & y |
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) |
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{ |
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GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'angle' only accept floating-point inputs"); |
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#ifdef GLM_FORCE_RADIANS |
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return acos(dot(x, y)); |
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#else |
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return degrees(acos(dot(x, y))); |
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#endif |
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} |
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template <typename T, precision P, template <typename, precision> class vecType> |
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GLM_FUNC_QUALIFIER T angle |
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( |
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vecType<T, P> const & x, |
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vecType<T, P> const & y |
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) |
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{ |
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GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'angle' only accept floating-point inputs"); |
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#ifdef GLM_FORCE_RADIANS |
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return acos(dot(x, y)); |
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#else |
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return degrees(acos(dot(x, y))); |
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#endif |
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} |
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//! \todo epsilon is hard coded to 0.01 |
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template <typename T, precision P> |
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GLM_FUNC_QUALIFIER T orientedAngle |
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( |
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detail::tvec2<T, P> const & x, |
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detail::tvec2<T, P> const & y |
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) |
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{ |
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GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'orientedAngle' only accept floating-point inputs"); |
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#ifdef GLM_FORCE_RADIANS |
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T const Angle(acos(dot(x, y))); |
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#else |
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T const Angle(degrees(acos(dot(x, y)))); |
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#endif |
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detail::tvec2<T, P> const TransformedVector(glm::rotate(x, Angle)); |
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if(all(epsilonEqual(y, TransformedVector, T(0.01)))) |
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return Angle; |
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else |
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return -Angle; |
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} |
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template <typename T, precision P> |
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GLM_FUNC_QUALIFIER T orientedAngle |
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( |
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detail::tvec3<T, P> const & x, |
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detail::tvec3<T, P> const & y, |
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detail::tvec3<T, P> const & ref |
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) |
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{ |
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GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'orientedAngle' only accept floating-point inputs"); |
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#ifdef GLM_FORCE_RADIANS |
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T const Angle(acos(dot(x, y))); |
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#else |
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T const Angle(degrees(acos(dot(x, y)))); |
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#endif |
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if(dot(ref, cross(x, y)) < T(0)) |
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return -Angle; |
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else |
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return Angle; |
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} |
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}//namespace glm
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