| 1 | #include "../exponential.hpp" |
| 2 | #include "../common.hpp" |
| 3 | |
| 4 | namespace glm{ |
| 5 | namespace detail |
| 6 | { |
| 7 | template<length_t L, typename T, qualifier Q, bool Aligned> |
| 8 | struct compute_length |
| 9 | { |
| 10 | GLM_FUNC_QUALIFIER static T call(vec<L, T, Q> const& v) |
| 11 | { |
| 12 | return sqrt(dot(v, v)); |
| 13 | } |
| 14 | }; |
| 15 | |
| 16 | template<length_t L, typename T, qualifier Q, bool Aligned> |
| 17 | struct compute_distance |
| 18 | { |
| 19 | GLM_FUNC_QUALIFIER static T call(vec<L, T, Q> const& p0, vec<L, T, Q> const& p1) |
| 20 | { |
| 21 | return length(p1 - p0); |
| 22 | } |
| 23 | }; |
| 24 | |
| 25 | template<typename V, typename T, bool Aligned> |
| 26 | struct compute_dot{}; |
| 27 | |
| 28 | template<typename T, qualifier Q, bool Aligned> |
| 29 | struct compute_dot<vec<1, T, Q>, T, Aligned> |
| 30 | { |
| 31 | GLM_FUNC_QUALIFIER GLM_CONSTEXPR static T call(vec<1, T, Q> const& a, vec<1, T, Q> const& b) |
| 32 | { |
| 33 | return a.x * b.x; |
| 34 | } |
| 35 | }; |
| 36 | |
| 37 | template<typename T, qualifier Q, bool Aligned> |
| 38 | struct compute_dot<vec<2, T, Q>, T, Aligned> |
| 39 | { |
| 40 | GLM_FUNC_QUALIFIER GLM_CONSTEXPR static T call(vec<2, T, Q> const& a, vec<2, T, Q> const& b) |
| 41 | { |
| 42 | vec<2, T, Q> tmp(a * b); |
| 43 | return tmp.x + tmp.y; |
| 44 | } |
| 45 | }; |
| 46 | |
| 47 | template<typename T, qualifier Q, bool Aligned> |
| 48 | struct compute_dot<vec<3, T, Q>, T, Aligned> |
| 49 | { |
| 50 | GLM_FUNC_QUALIFIER GLM_CONSTEXPR static T call(vec<3, T, Q> const& a, vec<3, T, Q> const& b) |
| 51 | { |
| 52 | vec<3, T, Q> tmp(a * b); |
| 53 | return tmp.x + tmp.y + tmp.z; |
| 54 | } |
| 55 | }; |
| 56 | |
| 57 | template<typename T, qualifier Q, bool Aligned> |
| 58 | struct compute_dot<vec<4, T, Q>, T, Aligned> |
| 59 | { |
| 60 | GLM_FUNC_QUALIFIER GLM_CONSTEXPR static T call(vec<4, T, Q> const& a, vec<4, T, Q> const& b) |
| 61 | { |
| 62 | // VS 17.7.4 generates longer assembly (~20 instructions vs 11 instructions) |
| 63 | #if defined(_MSC_VER) |
| 64 | return a.x * b.x + a.y * b.y + a.z * b.z + a.w * b.w; |
| 65 | #else |
| 66 | vec<4, T, Q> tmp(a * b); |
| 67 | return (tmp.x + tmp.y) + (tmp.z + tmp.w); |
| 68 | #endif |
| 69 | } |
| 70 | }; |
| 71 | |
| 72 | template<typename T, qualifier Q, bool Aligned> |
| 73 | struct compute_cross |
| 74 | { |
| 75 | GLM_FUNC_QUALIFIER GLM_CONSTEXPR static vec<3, T, Q> call(vec<3, T, Q> const& x, vec<3, T, Q> const& y) |
| 76 | { |
| 77 | static_assert(std::numeric_limits<T>::is_iec559, "'cross' accepts only floating-point inputs"); |
| 78 | |
| 79 | return vec<3, T, Q>( |
| 80 | x.y * y.z - y.y * x.z, |
| 81 | x.z * y.x - y.z * x.x, |
| 82 | x.x * y.y - y.x * x.y); |
| 83 | } |
| 84 | |
| 85 | GLM_FUNC_QUALIFIER GLM_CONSTEXPR static vec<4, T, Q> call(vec<4, T, Q> const& x, vec<4, T, Q> const& y) |
| 86 | { |
| 87 | static_assert(std::numeric_limits<T>::is_iec559, "'cross' accepts only floating-point inputs"); |
| 88 | |
| 89 | return vec<4, T, Q>( |
| 90 | x.y * y.z - y.y * x.z, |
| 91 | x.z * y.x - y.z * x.x, |
| 92 | x.x * y.y - y.x * x.y, |
| 93 | 0.0f); |
| 94 | } |
| 95 | }; |
| 96 | |
| 97 | template<length_t L, typename T, qualifier Q, bool Aligned> |
| 98 | struct compute_normalize |
| 99 | { |
| 100 | GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& v) |
| 101 | { |
| 102 | static_assert(std::numeric_limits<T>::is_iec559, "'normalize' accepts only floating-point inputs"); |
| 103 | |
| 104 | return v * inversesqrt(dot(v, v)); |
| 105 | } |
| 106 | }; |
| 107 | |
| 108 | template<length_t L, typename T, qualifier Q, bool Aligned> |
| 109 | struct compute_faceforward |
| 110 | { |
| 111 | GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& N, vec<L, T, Q> const& I, vec<L, T, Q> const& Nref) |
| 112 | { |
| 113 | static_assert(std::numeric_limits<T>::is_iec559, "'normalize' accepts only floating-point inputs"); |
| 114 | |
| 115 | return dot(Nref, I) < static_cast<T>(0) ? N : -N; |
| 116 | } |
| 117 | }; |
| 118 | |
| 119 | template<length_t L, typename T, qualifier Q, bool Aligned> |
| 120 | struct compute_reflect |
| 121 | { |
| 122 | GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& I, vec<L, T, Q> const& N) |
| 123 | { |
| 124 | return I - N * dot(N, I) * static_cast<T>(2); |
| 125 | } |
| 126 | }; |
| 127 | |
| 128 | template<length_t L, typename T, qualifier Q, bool Aligned> |
| 129 | struct compute_refract |
| 130 | { |
| 131 | GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& I, vec<L, T, Q> const& N, T eta) |
| 132 | { |
| 133 | T const dotValue(dot(N, I)); |
| 134 | T const k(static_cast<T>(1) - eta * eta * (static_cast<T>(1) - dotValue * dotValue)); |
| 135 | vec<L, T, Q> const Result = |
| 136 | (k >= static_cast<T>(0)) ? (eta * I - (eta * dotValue + std::sqrt(k)) * N) : vec<L, T, Q>(0); |
| 137 | return Result; |
| 138 | } |
| 139 | }; |
| 140 | }//namespace detail |
| 141 | |
| 142 | // length |
| 143 | template<typename genType> |
| 144 | GLM_FUNC_QUALIFIER genType length(genType x) |
| 145 | { |
| 146 | static_assert(std::numeric_limits<genType>::is_iec559, "'length' accepts only floating-point inputs"); |
| 147 | |
| 148 | return abs(x); |
| 149 | } |
| 150 | |
| 151 | template<length_t L, typename T, qualifier Q> |
| 152 | GLM_FUNC_QUALIFIER T length(vec<L, T, Q> const& v) |
| 153 | { |
| 154 | static_assert(std::numeric_limits<T>::is_iec559, "'length' accepts only floating-point inputs"); |
| 155 | |
| 156 | return detail::compute_length<L, T, Q, detail::is_aligned<Q>::value>::call(v); |
| 157 | } |
| 158 | |
| 159 | // distance |
| 160 | template<typename genType> |
| 161 | GLM_FUNC_QUALIFIER genType distance(genType const& p0, genType const& p1) |
| 162 | { |
| 163 | static_assert(std::numeric_limits<genType>::is_iec559, "'distance' accepts only floating-point inputs"); |
| 164 | |
| 165 | return length(p1 - p0); |
| 166 | } |
| 167 | |
| 168 | template<length_t L, typename T, qualifier Q> |
| 169 | GLM_FUNC_QUALIFIER T distance(vec<L, T, Q> const& p0, vec<L, T, Q> const& p1) |
| 170 | { |
| 171 | return detail::compute_distance<L, T, Q, detail::is_aligned<Q>::value>::call(p0, p1); |
| 172 | } |
| 173 | |
| 174 | // dot |
| 175 | template<typename T> |
| 176 | GLM_FUNC_QUALIFIER GLM_CONSTEXPR T dot(T x, T y) |
| 177 | { |
| 178 | static_assert(std::numeric_limits<T>::is_iec559, "'dot' accepts only floating-point inputs"); |
| 179 | return x * y; |
| 180 | } |
| 181 | |
| 182 | template<length_t L, typename T, qualifier Q> |
| 183 | GLM_FUNC_QUALIFIER GLM_CONSTEXPR T dot(vec<L, T, Q> const& x, vec<L, T, Q> const& y) |
| 184 | { |
| 185 | static_assert(std::numeric_limits<T>::is_iec559, "'dot' accepts only floating-point inputs"); |
| 186 | return detail::compute_dot<vec<L, T, Q>, T, detail::is_aligned<Q>::value>::call(x, y); |
| 187 | } |
| 188 | |
| 189 | // cross |
| 190 | template<typename T, qualifier Q> |
| 191 | GLM_FUNC_QUALIFIER GLM_CONSTEXPR vec<3, T, Q> cross(vec<3, T, Q> const& x, vec<3, T, Q> const& y) |
| 192 | { |
| 193 | return detail::compute_cross<T, Q, detail::is_aligned<Q>::value>::call(x, y); |
| 194 | } |
| 195 | /* |
| 196 | // normalize |
| 197 | template<typename genType> |
| 198 | GLM_FUNC_QUALIFIER genType normalize(genType const& x) |
| 199 | { |
| 200 | static_assert(std::numeric_limits<genType>::is_iec559, "'normalize' accepts only floating-point inputs"); |
| 201 | |
| 202 | return x < genType(0) ? genType(-1) : genType(1); |
| 203 | } |
| 204 | */ |
| 205 | template<length_t L, typename T, qualifier Q> |
| 206 | GLM_FUNC_QUALIFIER vec<L, T, Q> normalize(vec<L, T, Q> const& x) |
| 207 | { |
| 208 | static_assert(std::numeric_limits<T>::is_iec559, "'normalize' accepts only floating-point inputs"); |
| 209 | |
| 210 | return detail::compute_normalize<L, T, Q, detail::is_aligned<Q>::value>::call(x); |
| 211 | } |
| 212 | |
| 213 | // faceforward |
| 214 | template<typename genType> |
| 215 | GLM_FUNC_QUALIFIER genType faceforward(genType const& N, genType const& I, genType const& Nref) |
| 216 | { |
| 217 | return dot(Nref, I) < static_cast<genType>(0) ? N : -N; |
| 218 | } |
| 219 | |
| 220 | template<length_t L, typename T, qualifier Q> |
| 221 | GLM_FUNC_QUALIFIER vec<L, T, Q> faceforward(vec<L, T, Q> const& N, vec<L, T, Q> const& I, vec<L, T, Q> const& Nref) |
| 222 | { |
| 223 | return detail::compute_faceforward<L, T, Q, detail::is_aligned<Q>::value>::call(N, I, Nref); |
| 224 | } |
| 225 | |
| 226 | // reflect |
| 227 | template<typename genType> |
| 228 | GLM_FUNC_QUALIFIER genType reflect(genType const& I, genType const& N) |
| 229 | { |
| 230 | return I - N * dot(N, I) * genType(2); |
| 231 | } |
| 232 | |
| 233 | template<length_t L, typename T, qualifier Q> |
| 234 | GLM_FUNC_QUALIFIER vec<L, T, Q> reflect(vec<L, T, Q> const& I, vec<L, T, Q> const& N) |
| 235 | { |
| 236 | return detail::compute_reflect<L, T, Q, detail::is_aligned<Q>::value>::call(I, N); |
| 237 | } |
| 238 | |
| 239 | // refract |
| 240 | template<typename genType> |
| 241 | GLM_FUNC_QUALIFIER genType refract(genType const& I, genType const& N, genType eta) |
| 242 | { |
| 243 | static_assert(std::numeric_limits<genType>::is_iec559, "'refract' accepts only floating-point inputs"); |
| 244 | genType const dotValue(dot(N, I)); |
| 245 | genType const k(static_cast<genType>(1) - eta * eta * (static_cast<genType>(1) - dotValue * dotValue)); |
| 246 | return (eta * I - (eta * dotValue + sqrt(k)) * N) * static_cast<genType>(k >= static_cast<genType>(0)); |
| 247 | } |
| 248 | |
| 249 | template<length_t L, typename T, qualifier Q> |
| 250 | GLM_FUNC_QUALIFIER vec<L, T, Q> refract(vec<L, T, Q> const& I, vec<L, T, Q> const& N, T eta) |
| 251 | { |
| 252 | static_assert(std::numeric_limits<T>::is_iec559, "'refract' accepts only floating-point inputs"); |
| 253 | return detail::compute_refract<L, T, Q, detail::is_aligned<Q>::value>::call(I, N, eta); |
| 254 | } |
| 255 | }//namespace glm |
| 256 | |
| 257 | #if GLM_CONFIG_SIMD == GLM_ENABLE |
| 258 | # include "func_geometric_simd.inl" |
| 259 | #endif |