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Diffstat (limited to 'external/include/glm/gtc/random.inl')
| -rw-r--r-- | external/include/glm/gtc/random.inl | 350 |
1 files changed, 350 insertions, 0 deletions
diff --git a/external/include/glm/gtc/random.inl b/external/include/glm/gtc/random.inl new file mode 100644 index 0000000..ad5926e --- /dev/null +++ b/external/include/glm/gtc/random.inl @@ -0,0 +1,350 @@ +/// @ref gtc_random +/// @file glm/gtc/random.inl + +#include "../geometric.hpp" +#include "../exponential.hpp" +#include <cstdlib> +#include <ctime> +#include <cassert> + +namespace glm{ +namespace detail +{ + template <typename T, precision P, template <class, precision> class vecType> + struct compute_rand + { + GLM_FUNC_QUALIFIER static vecType<T, P> call(); + }; + + template <precision P> + struct compute_rand<uint8, P, tvec1> + { + GLM_FUNC_QUALIFIER static tvec1<uint8, P> call() + { + return tvec1<uint8, P>( + std::rand() % std::numeric_limits<uint8>::max()); + } + }; + + template <precision P> + struct compute_rand<uint8, P, tvec2> + { + GLM_FUNC_QUALIFIER static tvec2<uint8, P> call() + { + return tvec2<uint8, P>( + std::rand() % std::numeric_limits<uint8>::max(), + std::rand() % std::numeric_limits<uint8>::max()); + } + }; + + template <precision P> + struct compute_rand<uint8, P, tvec3> + { + GLM_FUNC_QUALIFIER static tvec3<uint8, P> call() + { + return tvec3<uint8, P>( + std::rand() % std::numeric_limits<uint8>::max(), + std::rand() % std::numeric_limits<uint8>::max(), + std::rand() % std::numeric_limits<uint8>::max()); + } + }; + + template <precision P> + struct compute_rand<uint8, P, tvec4> + { + GLM_FUNC_QUALIFIER static tvec4<uint8, P> call() + { + return tvec4<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 <precision P, template <class, precision> class vecType> + struct compute_rand<uint16, P, vecType> + { + GLM_FUNC_QUALIFIER static vecType<uint16, P> call() + { + return + (vecType<uint16, P>(compute_rand<uint8, P, vecType>::call()) << static_cast<uint16>(8)) | + (vecType<uint16, P>(compute_rand<uint8, P, vecType>::call()) << static_cast<uint16>(0)); + } + }; + + template <precision P, template <class, precision> class vecType> + struct compute_rand<uint32, P, vecType> + { + GLM_FUNC_QUALIFIER static vecType<uint32, P> call() + { + return + (vecType<uint32, P>(compute_rand<uint16, P, vecType>::call()) << static_cast<uint32>(16)) | + (vecType<uint32, P>(compute_rand<uint16, P, vecType>::call()) << static_cast<uint32>(0)); + } + }; + + template <precision P, template <class, precision> class vecType> + struct compute_rand<uint64, P, vecType> + { + GLM_FUNC_QUALIFIER static vecType<uint64, P> call() + { + return + (vecType<uint64, P>(compute_rand<uint32, P, vecType>::call()) << static_cast<uint64>(32)) | + (vecType<uint64, P>(compute_rand<uint32, P, vecType>::call()) << static_cast<uint64>(0)); + } + }; + + template <typename T, precision P, template <class, precision> class vecType> + struct compute_linearRand + { + GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & Min, vecType<T, P> const & Max); + }; + + template <precision P, template <class, precision> class vecType> + struct compute_linearRand<int8, P, vecType> + { + GLM_FUNC_QUALIFIER static vecType<int8, P> call(vecType<int8, P> const & Min, vecType<int8, P> const & Max) + { + return (vecType<int8, P>(compute_rand<uint8, P, vecType>::call() % vecType<uint8, P>(Max + static_cast<int8>(1) - Min))) + Min; + } + }; + + template <precision P, template <class, precision> class vecType> + struct compute_linearRand<uint8, P, vecType> + { + GLM_FUNC_QUALIFIER static vecType<uint8, P> call(vecType<uint8, P> const & Min, vecType<uint8, P> const & Max) + { + return (compute_rand<uint8, P, vecType>::call() % (Max + static_cast<uint8>(1) - Min)) + Min; + } + }; + + template <precision P, template <class, precision> class vecType> + struct compute_linearRand<int16, P, vecType> + { + GLM_FUNC_QUALIFIER static vecType<int16, P> call(vecType<int16, P> const & Min, vecType<int16, P> const & Max) + { + return (vecType<int16, P>(compute_rand<uint16, P, vecType>::call() % vecType<uint16, P>(Max + static_cast<int16>(1) - Min))) + Min; + } + }; + + template <precision P, template <class, precision> class vecType> + struct compute_linearRand<uint16, P, vecType> + { + GLM_FUNC_QUALIFIER static vecType<uint16, P> call(vecType<uint16, P> const & Min, vecType<uint16, P> const & Max) + { + return (compute_rand<uint16, P, vecType>::call() % (Max + static_cast<uint16>(1) - Min)) + Min; + } + }; + + template <precision P, template <class, precision> class vecType> + struct compute_linearRand<int32, P, vecType> + { + GLM_FUNC_QUALIFIER static vecType<int32, P> call(vecType<int32, P> const & Min, vecType<int32, P> const & Max) + { + return (vecType<int32, P>(compute_rand<uint32, P, vecType>::call() % vecType<uint32, P>(Max + static_cast<int32>(1) - Min))) + Min; + } + }; + + template <precision P, template <class, precision> class vecType> + struct compute_linearRand<uint32, P, vecType> + { + GLM_FUNC_QUALIFIER static vecType<uint32, P> call(vecType<uint32, P> const & Min, vecType<uint32, P> const & Max) + { + return (compute_rand<uint32, P, vecType>::call() % (Max + static_cast<uint32>(1) - Min)) + Min; + } + }; + + template <precision P, template <class, precision> class vecType> + struct compute_linearRand<int64, P, vecType> + { + GLM_FUNC_QUALIFIER static vecType<int64, P> call(vecType<int64, P> const & Min, vecType<int64, P> const & Max) + { + return (vecType<int64, P>(compute_rand<uint64, P, vecType>::call() % vecType<uint64, P>(Max + static_cast<int64>(1) - Min))) + Min; + } + }; + + template <precision P, template <class, precision> class vecType> + struct compute_linearRand<uint64, P, vecType> + { + GLM_FUNC_QUALIFIER static vecType<uint64, P> call(vecType<uint64, P> const & Min, vecType<uint64, P> const & Max) + { + return (compute_rand<uint64, P, vecType>::call() % (Max + static_cast<uint64>(1) - Min)) + Min; + } + }; + + template <template <class, precision> class vecType> + struct compute_linearRand<float, lowp, vecType> + { + GLM_FUNC_QUALIFIER static vecType<float, lowp> call(vecType<float, lowp> const & Min, vecType<float, lowp> const & Max) + { + return vecType<float, lowp>(compute_rand<uint8, lowp, vecType>::call()) / static_cast<float>(std::numeric_limits<uint8>::max()) * (Max - Min) + Min; + } + }; + + template <template <class, precision> class vecType> + struct compute_linearRand<float, mediump, vecType> + { + GLM_FUNC_QUALIFIER static vecType<float, mediump> call(vecType<float, mediump> const & Min, vecType<float, mediump> const & Max) + { + return vecType<float, mediump>(compute_rand<uint16, mediump, vecType>::call()) / static_cast<float>(std::numeric_limits<uint16>::max()) * (Max - Min) + Min; + } + }; + + template <template <class, precision> class vecType> + struct compute_linearRand<float, highp, vecType> + { + GLM_FUNC_QUALIFIER static vecType<float, highp> call(vecType<float, highp> const & Min, vecType<float, highp> const & Max) + { + return vecType<float, highp>(compute_rand<uint32, highp, vecType>::call()) / static_cast<float>(std::numeric_limits<uint32>::max()) * (Max - Min) + Min; + } + }; + + template <template <class, precision> class vecType> + struct compute_linearRand<double, lowp, vecType> + { + GLM_FUNC_QUALIFIER static vecType<double, lowp> call(vecType<double, lowp> const & Min, vecType<double, lowp> const & Max) + { + return vecType<double, lowp>(compute_rand<uint16, lowp, vecType>::call()) / static_cast<double>(std::numeric_limits<uint16>::max()) * (Max - Min) + Min; + } + }; + + template <template <class, precision> class vecType> + struct compute_linearRand<double, mediump, vecType> + { + GLM_FUNC_QUALIFIER static vecType<double, mediump> call(vecType<double, mediump> const & Min, vecType<double, mediump> const & Max) + { + return vecType<double, mediump>(compute_rand<uint32, mediump, vecType>::call()) / static_cast<double>(std::numeric_limits<uint32>::max()) * (Max - Min) + Min; + } + }; + + template <template <class, precision> class vecType> + struct compute_linearRand<double, highp, vecType> + { + GLM_FUNC_QUALIFIER static vecType<double, highp> call(vecType<double, highp> const & Min, vecType<double, highp> const & Max) + { + return vecType<double, highp>(compute_rand<uint64, highp, vecType>::call()) / static_cast<double>(std::numeric_limits<uint64>::max()) * (Max - Min) + Min; + } + }; + + template <template <class, precision> class vecType> + struct compute_linearRand<long double, lowp, vecType> + { + GLM_FUNC_QUALIFIER static vecType<long double, lowp> call(vecType<long double, lowp> const & Min, vecType<long double, lowp> const & Max) + { + return vecType<long double, lowp>(compute_rand<uint32, lowp, vecType>::call()) / static_cast<long double>(std::numeric_limits<uint32>::max()) * (Max - Min) + Min; + } + }; + + template <template <class, precision> class vecType> + struct compute_linearRand<long double, mediump, vecType> + { + GLM_FUNC_QUALIFIER static vecType<long double, mediump> call(vecType<long double, mediump> const & Min, vecType<long double, mediump> const & Max) + { + return vecType<long double, mediump>(compute_rand<uint64, mediump, vecType>::call()) / static_cast<long double>(std::numeric_limits<uint64>::max()) * (Max - Min) + Min; + } + }; + + template <template <class, precision> class vecType> + struct compute_linearRand<long double, highp, vecType> + { + GLM_FUNC_QUALIFIER static vecType<long double, highp> call(vecType<long double, highp> const & Min, vecType<long double, highp> const & Max) + { + return vecType<long double, highp>(compute_rand<uint64, highp, vecType>::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<genType, highp, tvec1>::call( + tvec1<genType, highp>(Min), + tvec1<genType, highp>(Max)).x; + } + + template <typename T, precision P, template <typename, precision> class vecType> + GLM_FUNC_QUALIFIER vecType<T, P> linearRand(vecType<T, P> const & Min, vecType<T, P> const & Max) + { + return detail::compute_linearRand<T, P, vecType>::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 x2 * Deviation * Deviation * sqrt((genType(-2) * log(w)) / w) + Mean; + } + + template <typename T, precision P, template <typename, precision> class vecType> + GLM_FUNC_QUALIFIER vecType<T, P> gaussRand(vecType<T, P> const & Mean, vecType<T, P> const & Deviation) + { + return detail::functor2<T, P, vecType>::call(gaussRand, Mean, Deviation); + } + + template <typename T> + GLM_FUNC_QUALIFIER tvec2<T, defaultp> diskRand(T Radius) + { + tvec2<T, defaultp> Result(T(0)); + T LenRadius(T(0)); + + do + { + Result = linearRand( + tvec2<T, defaultp>(-Radius), + tvec2<T, defaultp>(Radius)); + LenRadius = length(Result); + } + while(LenRadius > Radius); + + return Result; + } + + template <typename T> + GLM_FUNC_QUALIFIER tvec3<T, defaultp> ballRand(T Radius) + { + tvec3<T, defaultp> Result(T(0)); + T LenRadius(T(0)); + + do + { + Result = linearRand( + tvec3<T, defaultp>(-Radius), + tvec3<T, defaultp>(Radius)); + LenRadius = length(Result); + } + while(LenRadius > Radius); + + return Result; + } + + template <typename T> + GLM_FUNC_QUALIFIER tvec2<T, defaultp> circularRand(T Radius) + { + T a = linearRand(T(0), T(6.283185307179586476925286766559f)); + return tvec2<T, defaultp>(cos(a), sin(a)) * Radius; + } + + template <typename T> + GLM_FUNC_QUALIFIER tvec3<T, defaultp> sphericalRand(T Radius) + { + T z = linearRand(T(-1), T(1)); + T a = linearRand(T(0), T(6.283185307179586476925286766559f)); + + T r = sqrt(T(1) - z * z); + + T x = r * cos(a); + T y = r * sin(a); + + return tvec3<T, defaultp>(x, y, z) * Radius; + } +}//namespace glm |