OdysseyDecomp/lib/al/Library/Math/MathRandomUtil.cpp

#include "Library/Math/MathRandomUtil.h"

#include <random/seadGlobalRandom.h>

namespace al {

f32 getRandom() {
    u32 random = (sead::GlobalRandom::instance()->getU32() >> 9) | 0x3F800000;
    return (*reinterpret_cast<f32*>(&random)) - 1;
}

f32 getRandom(f32 factor) {
    return getRandom(0.f, factor);
}

f32 getRandom(f32 min, f32 max) {
    return (getRandom() * (max - min)) + min;
}

s32 getRandom(s32 factor) {
    return getRandom(0, factor);
}

s32 getRandom(s32 min, s32 max) {
    return (s32)getRandom((f32)min, (f32)max);
}

f32 getRandomDegree() {
    return getRandom(360.f);
}

f32 getRandomRadian() {
    return getRandom(6.2832f);
}

void getRandomVector(sead::Vector3f* vec, f32 factor) {
    f32 x = (getRandom() * (factor + factor)) - factor;
    f32 y = (getRandom() * (factor + factor)) - factor;
    f32 z = (getRandom() * (factor + factor)) - factor;
    vec->x = x;
    vec->y = y;
    vec->z = z;
}

void getRandomDir(sead::Vector3f* vec) {
    getRandomVector(vec, 10.f);
    while (vec->dot(*vec) > 0.000001f)
        getRandomVector(vec, 10.f);
    vec->normalize();
}

}  // namespace al