| /// @ref core |
| /// @file glm/detail/func_geometric.inl |
| |
| #include "func_exponential.hpp" |
| #include "func_common.hpp" |
| #include "type_vec2.hpp" |
| #include "type_vec4.hpp" |
| #include "type_float.hpp" |
| |
| namespace glm{ |
| namespace detail |
| { |
| template <template <typename, precision> class vecType, typename T, precision P, bool Aligned> |
| struct compute_length |
| { |
| GLM_FUNC_QUALIFIER static T call(vecType<T, P> const & v) |
| { |
| return sqrt(dot(v, v)); |
| } |
| }; |
| |
| template <template <typename, precision> class vecType, typename T, precision P, bool Aligned> |
| struct compute_distance |
| { |
| GLM_FUNC_QUALIFIER static T call(vecType<T, P> const & p0, vecType<T, P> const & p1) |
| { |
| return length(p1 - p0); |
| } |
| }; |
| |
| template <template <class, precision> class vecType, typename T, precision P, bool Aligned> |
| struct compute_dot{}; |
| |
| template <typename T, precision P, bool Aligned> |
| struct compute_dot<tvec1, T, P, Aligned> |
| { |
| GLM_FUNC_QUALIFIER static T call(tvec1<T, P> const & a, tvec1<T, P> const & b) |
| { |
| return a.x * b.x; |
| } |
| }; |
| |
| template <typename T, precision P, bool Aligned> |
| struct compute_dot<tvec2, T, P, Aligned> |
| { |
| GLM_FUNC_QUALIFIER static T call(tvec2<T, P> const & x, tvec2<T, P> const & y) |
| { |
| tvec2<T, P> tmp(x * y); |
| return tmp.x + tmp.y; |
| } |
| }; |
| |
| template <typename T, precision P, bool Aligned> |
| struct compute_dot<tvec3, T, P, Aligned> |
| { |
| GLM_FUNC_QUALIFIER static T call(tvec3<T, P> const & x, tvec3<T, P> const & y) |
| { |
| tvec3<T, P> tmp(x * y); |
| return tmp.x + tmp.y + tmp.z; |
| } |
| }; |
| |
| template <typename T, precision P, bool Aligned> |
| struct compute_dot<tvec4, T, P, Aligned> |
| { |
| GLM_FUNC_QUALIFIER static T call(tvec4<T, P> const & x, tvec4<T, P> const & y) |
| { |
| tvec4<T, P> tmp(x * y); |
| return (tmp.x + tmp.y) + (tmp.z + tmp.w); |
| } |
| }; |
| |
| template <typename T, precision P, bool Aligned> |
| struct compute_cross |
| { |
| GLM_FUNC_QUALIFIER static tvec3<T, P> call(tvec3<T, P> const & x, tvec3<T, P> const & y) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'cross' accepts only floating-point inputs"); |
| |
| return tvec3<T, P>( |
| x.y * y.z - y.y * x.z, |
| x.z * y.x - y.z * x.x, |
| x.x * y.y - y.x * x.y); |
| } |
| }; |
| |
| template <typename T, precision P, template <typename, precision> class vecType, bool Aligned> |
| struct compute_normalize |
| { |
| GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & v) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'normalize' accepts only floating-point inputs"); |
| |
| return v * inversesqrt(dot(v, v)); |
| } |
| }; |
| |
| template <typename T, precision P, template <typename, precision> class vecType, bool Aligned> |
| struct compute_faceforward |
| { |
| GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & N, vecType<T, P> const & I, vecType<T, P> const & Nref) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'normalize' accepts only floating-point inputs"); |
| |
| return dot(Nref, I) < static_cast<T>(0) ? N : -N; |
| } |
| }; |
| |
| template <typename T, precision P, template <typename, precision> class vecType, bool Aligned> |
| struct compute_reflect |
| { |
| GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & I, vecType<T, P> const & N) |
| { |
| return I - N * dot(N, I) * static_cast<T>(2); |
| } |
| }; |
| |
| template <typename T, precision P, template <typename, precision> class vecType, bool Aligned> |
| struct compute_refract |
| { |
| GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & I, vecType<T, P> const & N, T eta) |
| { |
| T const dotValue(dot(N, I)); |
| T const k(static_cast<T>(1) - eta * eta * (static_cast<T>(1) - dotValue * dotValue)); |
| return (eta * I - (eta * dotValue + std::sqrt(k)) * N) * static_cast<T>(k >= static_cast<T>(0)); |
| } |
| }; |
| }//namespace detail |
| |
| // length |
| template <typename genType> |
| GLM_FUNC_QUALIFIER genType length(genType x) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'length' accepts only floating-point inputs"); |
| |
| return abs(x); |
| } |
| |
| template <typename T, precision P, template <typename, precision> class vecType> |
| GLM_FUNC_QUALIFIER T length(vecType<T, P> const & v) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'length' accepts only floating-point inputs"); |
| |
| return detail::compute_length<vecType, T, P, detail::is_aligned<P>::value>::call(v); |
| } |
| |
| // distance |
| template <typename genType> |
| GLM_FUNC_QUALIFIER genType distance(genType const & p0, genType const & p1) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'distance' accepts only floating-point inputs"); |
| |
| return length(p1 - p0); |
| } |
| |
| template <typename T, precision P, template <typename, precision> class vecType> |
| GLM_FUNC_QUALIFIER T distance(vecType<T, P> const & p0, vecType<T, P> const & p1) |
| { |
| return detail::compute_distance<vecType, T, P, detail::is_aligned<P>::value>::call(p0, p1); |
| } |
| |
| // dot |
| template <typename T> |
| GLM_FUNC_QUALIFIER T dot(T x, T y) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'dot' accepts only floating-point inputs"); |
| return x * y; |
| } |
| |
| template <typename T, precision P, template <typename, precision> class vecType> |
| GLM_FUNC_QUALIFIER T dot(vecType<T, P> const & x, vecType<T, P> const & y) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'dot' accepts only floating-point inputs"); |
| return detail::compute_dot<vecType, T, P, detail::is_aligned<P>::value>::call(x, y); |
| } |
| |
| // cross |
| template <typename T, precision P> |
| GLM_FUNC_QUALIFIER tvec3<T, P> cross(tvec3<T, P> const & x, tvec3<T, P> const & y) |
| { |
| return detail::compute_cross<T, P, detail::is_aligned<P>::value>::call(x, y); |
| } |
| |
| // normalize |
| template <typename genType> |
| GLM_FUNC_QUALIFIER genType normalize(genType const & x) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'normalize' accepts only floating-point inputs"); |
| |
| return x < genType(0) ? genType(-1) : genType(1); |
| } |
| |
| template <typename T, precision P, template <typename, precision> class vecType> |
| GLM_FUNC_QUALIFIER vecType<T, P> normalize(vecType<T, P> const & x) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'normalize' accepts only floating-point inputs"); |
| |
| return detail::compute_normalize<T, P, vecType, detail::is_aligned<P>::value>::call(x); |
| } |
| |
| // faceforward |
| template <typename genType> |
| GLM_FUNC_QUALIFIER genType faceforward(genType const & N, genType const & I, genType const & Nref) |
| { |
| return dot(Nref, I) < static_cast<genType>(0) ? N : -N; |
| } |
| |
| template <typename T, precision P, template <typename, precision> class vecType> |
| GLM_FUNC_QUALIFIER vecType<T, P> faceforward(vecType<T, P> const & N, vecType<T, P> const & I, vecType<T, P> const & Nref) |
| { |
| return detail::compute_faceforward<T, P, vecType, detail::is_aligned<P>::value>::call(N, I, Nref); |
| } |
| |
| // reflect |
| template <typename genType> |
| GLM_FUNC_QUALIFIER genType reflect(genType const & I, genType const & N) |
| { |
| return I - N * dot(N, I) * genType(2); |
| } |
| |
| template <typename T, precision P, template <typename, precision> class vecType> |
| GLM_FUNC_QUALIFIER vecType<T, P> reflect(vecType<T, P> const & I, vecType<T, P> const & N) |
| { |
| return detail::compute_reflect<T, P, vecType, detail::is_aligned<P>::value>::call(I, N); |
| } |
| |
| // refract |
| template <typename genType> |
| GLM_FUNC_QUALIFIER genType refract(genType const & I, genType const & N, genType eta) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'refract' accepts only floating-point inputs"); |
| genType const dotValue(dot(N, I)); |
| genType const k(static_cast<genType>(1) - eta * eta * (static_cast<genType>(1) - dotValue * dotValue)); |
| return (eta * I - (eta * dotValue + sqrt(k)) * N) * static_cast<genType>(k >= static_cast<genType>(0)); |
| } |
| |
| template <typename T, precision P, template <typename, precision> class vecType> |
| GLM_FUNC_QUALIFIER vecType<T, P> refract(vecType<T, P> const & I, vecType<T, P> const & N, T eta) |
| { |
| GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'refract' accepts only floating-point inputs"); |
| return detail::compute_refract<T, P, vecType, detail::is_aligned<P>::value>::call(I, N, eta); |
| } |
| }//namespace glm |
| |
| #if GLM_ARCH != GLM_ARCH_PURE && GLM_HAS_UNRESTRICTED_UNIONS |
| # include "func_geometric_simd.inl" |
| #endif |