double rand_chance(void) { return sfmtRand->Random() * 100.0; }
double rand_norm(void) { return sfmtRand->Random(); }
float frand(float min, float max) { return float(sfmtRand->Random() * (max - min) + min); }
float frand(float min, float max) { ASSERT(max >= min); return float(sfmtRand->Random() * (max - min) + min); }
float frand(float min, float max) { assert(max >= min); return float(sfmtRand->Random() * (max - min) + min); }