cube-game-plus-plus/common/utils/Random.cpp

#include <chrono>

#include "common/utils/Random.h"

Random::Random() : seed(std::chrono::steady_clock::now().time_since_epoch().count()) {
}

Random::Random(u64 seed) : seed(seed) {
}

u32 Random::next() {
    return nextSeed() >> 24;
}

u32 Random::next(uint bound) {
    return next() % bound;
}

float Random::nextFloat() {
    return next() * (1.0f / (0xFFFFFF + 1.0f));
}

float Random::nextFloat(float scale) {
    return (nextFloat() - 0.5f) * 2.0f * scale;
}

u64 Random::nextSeed() {
    seed = (seed * 0x5DEECE66DL + 0xBL) & 0xFFFFFFFFFFFF;
    return seed;
}