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58 lines
1.5 KiB
58 lines
1.5 KiB
/// @ref gtx_vector_angle |
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/// @file glm/gtx/vector_angle.inl |
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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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return acos(clamp(dot(x, y), genType(-1), genType(1))); |
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} |
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template<length_t L, typename T, precision P, template<length_t, typename, precision> class vecType> |
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GLM_FUNC_QUALIFIER T angle |
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( |
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vecType<L, T, P> const& x, |
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vecType<L, 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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return acos(clamp(dot(x, y), T(-1), T(1))); |
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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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vec<2, T, P> const & x, |
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vec<2, 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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T const Angle(acos(clamp(dot(x, y), T(-1), T(1)))); |
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if(all(epsilonEqual(y, glm::rotate(x, Angle), T(0.0001)))) |
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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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vec<3, T, P> const & x, |
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vec<3, T, P> const & y, |
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vec<3, 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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T const Angle(acos(clamp(dot(x, y), T(-1), T(1)))); |
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return mix(Angle, -Angle, dot(ref, cross(x, y)) < T(0)); |
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} |
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}//namespace glm
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