diff options
Diffstat (limited to 'src/include/glm/detail/func_geometric.inl')
| -rw-r--r-- | src/include/glm/detail/func_geometric.inl | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/src/include/glm/detail/func_geometric.inl b/src/include/glm/detail/func_geometric.inl new file mode 100644 index 0000000..7689756 --- /dev/null +++ b/src/include/glm/detail/func_geometric.inl @@ -0,0 +1,243 @@ +#include "../exponential.hpp"
+#include "../common.hpp"
+
+namespace glm{
+namespace detail
+{
+ template<length_t L, typename T, qualifier Q, bool Aligned>
+ struct compute_length
+ {
+ GLM_FUNC_QUALIFIER static T call(vec<L, T, Q> const& v)
+ {
+ return sqrt(dot(v, v));
+ }
+ };
+
+ template<length_t L, typename T, qualifier Q, bool Aligned>
+ struct compute_distance
+ {
+ GLM_FUNC_QUALIFIER static T call(vec<L, T, Q> const& p0, vec<L, T, Q> const& p1)
+ {
+ return length(p1 - p0);
+ }
+ };
+
+ template<typename V, typename T, bool Aligned>
+ struct compute_dot{};
+
+ template<typename T, qualifier Q, bool Aligned>
+ struct compute_dot<vec<1, T, Q>, T, Aligned>
+ {
+ GLM_FUNC_QUALIFIER static T call(vec<1, T, Q> const& a, vec<1, T, Q> const& b)
+ {
+ return a.x * b.x;
+ }
+ };
+
+ template<typename T, qualifier Q, bool Aligned>
+ struct compute_dot<vec<2, T, Q>, T, Aligned>
+ {
+ GLM_FUNC_QUALIFIER static T call(vec<2, T, Q> const& a, vec<2, T, Q> const& b)
+ {
+ vec<2, T, Q> tmp(a * b);
+ return tmp.x + tmp.y;
+ }
+ };
+
+ template<typename T, qualifier Q, bool Aligned>
+ struct compute_dot<vec<3, T, Q>, T, Aligned>
+ {
+ GLM_FUNC_QUALIFIER static T call(vec<3, T, Q> const& a, vec<3, T, Q> const& b)
+ {
+ vec<3, T, Q> tmp(a * b);
+ return tmp.x + tmp.y + tmp.z;
+ }
+ };
+
+ template<typename T, qualifier Q, bool Aligned>
+ struct compute_dot<vec<4, T, Q>, T, Aligned>
+ {
+ GLM_FUNC_QUALIFIER static T call(vec<4, T, Q> const& a, vec<4, T, Q> const& b)
+ {
+ vec<4, T, Q> tmp(a * b);
+ return (tmp.x + tmp.y) + (tmp.z + tmp.w);
+ }
+ };
+
+ template<typename T, qualifier Q, bool Aligned>
+ struct compute_cross
+ {
+ GLM_FUNC_QUALIFIER static vec<3, T, Q> call(vec<3, T, Q> const& x, vec<3, T, Q> const& y)
+ {
+ GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'cross' accepts only floating-point inputs");
+
+ return vec<3, T, Q>(
+ 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<length_t L, typename T, qualifier Q, bool Aligned>
+ struct compute_normalize
+ {
+ GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& v)
+ {
+ GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'normalize' accepts only floating-point inputs");
+
+ return v * inversesqrt(dot(v, v));
+ }
+ };
+
+ template<length_t L, typename T, qualifier Q, bool Aligned>
+ struct compute_faceforward
+ {
+ 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)
+ {
+ 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<length_t L, typename T, qualifier Q, bool Aligned>
+ struct compute_reflect
+ {
+ GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& I, vec<L, T, Q> const& N)
+ {
+ return I - N * dot(N, I) * static_cast<T>(2);
+ }
+ };
+
+ template<length_t L, typename T, qualifier Q, bool Aligned>
+ struct compute_refract
+ {
+ GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& I, vec<L, T, Q> 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));
+ vec<L, T, Q> const Result =
+ (k >= static_cast<T>(0)) ? (eta * I - (eta * dotValue + std::sqrt(k)) * N) : vec<L, T, Q>(0);
+ return Result;
+ }
+ };
+}//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<length_t L, typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER T length(vec<L, T, Q> const& v)
+ {
+ GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'length' accepts only floating-point inputs");
+
+ return detail::compute_length<L, T, Q, detail::is_aligned<Q>::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<length_t L, typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER T distance(vec<L, T, Q> const& p0, vec<L, T, Q> const& p1)
+ {
+ return detail::compute_distance<L, T, Q, detail::is_aligned<Q>::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<length_t L, typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER T dot(vec<L, T, Q> const& x, vec<L, T, Q> const& y)
+ {
+ GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'dot' accepts only floating-point inputs");
+ return detail::compute_dot<vec<L, T, Q>, T, detail::is_aligned<Q>::value>::call(x, y);
+ }
+
+ // cross
+ template<typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<3, T, Q> cross(vec<3, T, Q> const& x, vec<3, T, Q> const& y)
+ {
+ return detail::compute_cross<T, Q, detail::is_aligned<Q>::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<length_t L, typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<L, T, Q> normalize(vec<L, T, Q> const& x)
+ {
+ GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'normalize' accepts only floating-point inputs");
+
+ return detail::compute_normalize<L, T, Q, detail::is_aligned<Q>::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<length_t L, typename T, qualifier Q>
+ 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)
+ {
+ return detail::compute_faceforward<L, T, Q, detail::is_aligned<Q>::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<length_t L, typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<L, T, Q> reflect(vec<L, T, Q> const& I, vec<L, T, Q> const& N)
+ {
+ return detail::compute_reflect<L, T, Q, detail::is_aligned<Q>::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<length_t L, typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<L, T, Q> refract(vec<L, T, Q> const& I, vec<L, T, Q> const& N, T eta)
+ {
+ GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'refract' accepts only floating-point inputs");
+ return detail::compute_refract<L, T, Q, detail::is_aligned<Q>::value>::call(I, N, eta);
+ }
+}//namespace glm
+
+#if GLM_CONFIG_SIMD == GLM_ENABLE
+# include "func_geometric_simd.inl"
+#endif
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