diff options
| -rw-r--r-- | src/core/random_func.hpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/core/random_func.hpp b/src/core/random_func.hpp index 82f751003..397e69667 100644 --- a/src/core/random_func.hpp +++ b/src/core/random_func.hpp @@ -108,7 +108,7 @@ static FORCEINLINE uint32 InteractiveRandomRange(uint16 max) * Checks if a given randomize-number is below a given probability. * * This function is used to check if the given probability by the fraction of (a/b) - * is greater than low 16 bits of the given randomize-number v. + * is greater than low 16 bits of the given randomize-number r. * * Do not use this function twice on the same random 16 bits as it will yield * the same result. One can use a random number for two calls to Chance16I, @@ -117,12 +117,12 @@ static FORCEINLINE uint32 InteractiveRandomRange(uint16 max) * @param a The numerator of the fraction * @param b The denominator of the fraction, must of course not be null * @param r The given randomize-number - * @return True if v is less or equals (a/b) + * @return True if the probability given by r is less or equal to (a/b) */ static FORCEINLINE bool Chance16I(const uint a, const uint b, const uint32 r) { assert(b != 0); - return (uint16)r < (uint16)(((a << 16) + b / 2) / b); + return (((uint16)r * b + b / 2) >> 16) < a; } /** |