#include "../geometric.hpp" #include "../exponential.hpp" #include "../trigonometric.hpp" #include "../detail/type_vec1.hpp" #include <cstdlib> #include <ctime> #include <cassert> #include <cmath> namespace glm{ namespace detail { template <length_t L, typename T, qualifier Q> struct compute_rand { GLM_FUNC_QUALIFIER static vec<L, T, Q> call(); }; template <qualifier P> struct compute_rand<1, uint8, P> { GLM_FUNC_QUALIFIER static vec<1, uint8, P> call() { return vec<1, uint8, P>( std::rand() % std::numeric_limits<uint8>::max()); } }; template <qualifier P> struct compute_rand<2, uint8, P> { GLM_FUNC_QUALIFIER static vec<2, uint8, P> call() { return vec<2, uint8, P>( std::rand() % std::numeric_limits<uint8>::max(), std::rand() % std::numeric_limits<uint8>::max()); } }; template <qualifier P> struct compute_rand<3, uint8, P> { GLM_FUNC_QUALIFIER static vec<3, uint8, P> call() { return vec<3, uint8, P>( std::rand() % std::numeric_limits<uint8>::max(), std::rand() % std::numeric_limits<uint8>::max(), std::rand() % std::numeric_limits<uint8>::max()); } }; template <qualifier P> struct compute_rand<4, uint8, P> { GLM_FUNC_QUALIFIER static vec<4, uint8, P> call() { return vec<4, uint8, P>( std::rand() % std::numeric_limits<uint8>::max(), std::rand() % std::numeric_limits<uint8>::max(), std::rand() % std::numeric_limits<uint8>::max(), std::rand() % std::numeric_limits<uint8>::max()); } }; template <length_t L, qualifier Q> struct compute_rand<L, uint16, Q> { GLM_FUNC_QUALIFIER static vec<L, uint16, Q> call() { return (vec<L, uint16, Q>(compute_rand<L, uint8, Q>::call()) << static_cast<uint16>(8)) | (vec<L, uint16, Q>(compute_rand<L, uint8, Q>::call()) << static_cast<uint16>(0)); } }; template <length_t L, qualifier Q> struct compute_rand<L, uint32, Q> { GLM_FUNC_QUALIFIER static vec<L, uint32, Q> call() { return (vec<L, uint32, Q>(compute_rand<L, uint16, Q>::call()) << static_cast<uint32>(16)) | (vec<L, uint32, Q>(compute_rand<L, uint16, Q>::call()) << static_cast<uint32>(0)); } }; template <length_t L, qualifier Q> struct compute_rand<L, uint64, Q> { GLM_FUNC_QUALIFIER static vec<L, uint64, Q> call() { return (vec<L, uint64, Q>(compute_rand<L, uint32, Q>::call()) << static_cast<uint64>(32)) | (vec<L, uint64, Q>(compute_rand<L, uint32, Q>::call()) << static_cast<uint64>(0)); } }; template <length_t L, typename T, qualifier Q> struct compute_linearRand { GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& Min, vec<L, T, Q> const& Max); }; template<length_t L, qualifier Q> struct compute_linearRand<L, int8, Q> { GLM_FUNC_QUALIFIER static vec<L, int8, Q> call(vec<L, int8, Q> const& Min, vec<L, int8, Q> const& Max) { return (vec<L, int8, Q>(compute_rand<L, uint8, Q>::call() % vec<L, uint8, Q>(Max + static_cast<int8>(1) - Min))) + Min; } }; template<length_t L, qualifier Q> struct compute_linearRand<L, uint8, Q> { GLM_FUNC_QUALIFIER static vec<L, uint8, Q> call(vec<L, uint8, Q> const& Min, vec<L, uint8, Q> const& Max) { return (compute_rand<L, uint8, Q>::call() % (Max + static_cast<uint8>(1) - Min)) + Min; } }; template<length_t L, qualifier Q> struct compute_linearRand<L, int16, Q> { GLM_FUNC_QUALIFIER static vec<L, int16, Q> call(vec<L, int16, Q> const& Min, vec<L, int16, Q> const& Max) { return (vec<L, int16, Q>(compute_rand<L, uint16, Q>::call() % vec<L, uint16, Q>(Max + static_cast<int16>(1) - Min))) + Min; } }; template<length_t L, qualifier Q> struct compute_linearRand<L, uint16, Q> { GLM_FUNC_QUALIFIER static vec<L, uint16, Q> call(vec<L, uint16, Q> const& Min, vec<L, uint16, Q> const& Max) { return (compute_rand<L, uint16, Q>::call() % (Max + static_cast<uint16>(1) - Min)) + Min; } }; template<length_t L, qualifier Q> struct compute_linearRand<L, int32, Q> { GLM_FUNC_QUALIFIER static vec<L, int32, Q> call(vec<L, int32, Q> const& Min, vec<L, int32, Q> const& Max) { return (vec<L, int32, Q>(compute_rand<L, uint32, Q>::call() % vec<L, uint32, Q>(Max + static_cast<int32>(1) - Min))) + Min; } }; template<length_t L, qualifier Q> struct compute_linearRand<L, uint32, Q> { GLM_FUNC_QUALIFIER static vec<L, uint32, Q> call(vec<L, uint32, Q> const& Min, vec<L, uint32, Q> const& Max) { return (compute_rand<L, uint32, Q>::call() % (Max + static_cast<uint32>(1) - Min)) + Min; } }; template<length_t L, qualifier Q> struct compute_linearRand<L, int64, Q> { GLM_FUNC_QUALIFIER static vec<L, int64, Q> call(vec<L, int64, Q> const& Min, vec<L, int64, Q> const& Max) { return (vec<L, int64, Q>(compute_rand<L, uint64, Q>::call() % vec<L, uint64, Q>(Max + static_cast<int64>(1) - Min))) + Min; } }; template<length_t L, qualifier Q> struct compute_linearRand<L, uint64, Q> { GLM_FUNC_QUALIFIER static vec<L, uint64, Q> call(vec<L, uint64, Q> const& Min, vec<L, uint64, Q> const& Max) { return (compute_rand<L, uint64, Q>::call() % (Max + static_cast<uint64>(1) - Min)) + Min; } }; template<length_t L, qualifier Q> struct compute_linearRand<L, float, Q> { GLM_FUNC_QUALIFIER static vec<L, float, Q> call(vec<L, float, Q> const& Min, vec<L, float, Q> const& Max) { return vec<L, float, Q>(compute_rand<L, uint32, Q>::call()) / static_cast<float>(std::numeric_limits<uint32>::max()) * (Max - Min) + Min; } }; template<length_t L, qualifier Q> struct compute_linearRand<L, double, Q> { GLM_FUNC_QUALIFIER static vec<L, double, Q> call(vec<L, double, Q> const& Min, vec<L, double, Q> const& Max) { return vec<L, double, Q>(compute_rand<L, uint64, Q>::call()) / static_cast<double>(std::numeric_limits<uint64>::max()) * (Max - Min) + Min; } }; template<length_t L, qualifier Q> struct compute_linearRand<L, long double, Q> { GLM_FUNC_QUALIFIER static vec<L, long double, Q> call(vec<L, long double, Q> const& Min, vec<L, long double, Q> const& Max) { return vec<L, long double, Q>(compute_rand<L, uint64, Q>::call()) / static_cast<long double>(std::numeric_limits<uint64>::max()) * (Max - Min) + Min; } }; }//namespace detail template<typename genType> GLM_FUNC_QUALIFIER genType linearRand(genType Min, genType Max) { return detail::compute_linearRand<1, genType, highp>::call( vec<1, genType, highp>(Min), vec<1, genType, highp>(Max)).x; } template<length_t L, typename T, qualifier Q> GLM_FUNC_QUALIFIER vec<L, T, Q> linearRand(vec<L, T, Q> const& Min, vec<L, T, Q> const& Max) { return detail::compute_linearRand<L, T, Q>::call(Min, Max); } template<typename genType> GLM_FUNC_QUALIFIER genType gaussRand(genType Mean, genType Deviation) { genType w, x1, x2; do { x1 = linearRand(genType(-1), genType(1)); x2 = linearRand(genType(-1), genType(1)); w = x1 * x1 + x2 * x2; } while(w > genType(1)); return static_cast<genType>(x2 * Deviation * Deviation * sqrt((genType(-2) * log(w)) / w) + Mean); } template<length_t L, typename T, qualifier Q> GLM_FUNC_QUALIFIER vec<L, T, Q> gaussRand(vec<L, T, Q> const& Mean, vec<L, T, Q> const& Deviation) { return detail::functor2<vec, L, T, Q>::call(gaussRand, Mean, Deviation); } template<typename T> GLM_FUNC_QUALIFIER vec<2, T, defaultp> diskRand(T Radius) { assert(Radius > static_cast<T>(0)); vec<2, T, defaultp> Result(T(0)); T LenRadius(T(0)); do { Result = linearRand( vec<2, T, defaultp>(-Radius), vec<2, T, defaultp>(Radius)); LenRadius = length(Result); } while(LenRadius > Radius); return Result; } template<typename T> GLM_FUNC_QUALIFIER vec<3, T, defaultp> ballRand(T Radius) { assert(Radius > static_cast<T>(0)); vec<3, T, defaultp> Result(T(0)); T LenRadius(T(0)); do { Result = linearRand( vec<3, T, defaultp>(-Radius), vec<3, T, defaultp>(Radius)); LenRadius = length(Result); } while(LenRadius > Radius); return Result; } template<typename T> GLM_FUNC_QUALIFIER vec<2, T, defaultp> circularRand(T Radius) { assert(Radius > static_cast<T>(0)); T a = linearRand(T(0), static_cast<T>(6.283185307179586476925286766559)); return vec<2, T, defaultp>(glm::cos(a), glm::sin(a)) * Radius; } template<typename T> GLM_FUNC_QUALIFIER vec<3, T, defaultp> sphericalRand(T Radius) { assert(Radius > static_cast<T>(0)); T theta = linearRand(T(0), T(6.283185307179586476925286766559f)); T phi = std::acos(linearRand(T(-1.0f), T(1.0f))); T x = std::sin(phi) * std::cos(theta); T y = std::sin(phi) * std::sin(theta); T z = std::cos(phi); return vec<3, T, defaultp>(x, y, z) * Radius; } }//namespace glm