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Pasi4K5 2022-06-22 16:49:07 +02:00
parent a912bcadf8
commit 2f1186d328
1 changed files with 6 additions and 0 deletions
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6
osu.Game.Rulesets.Osu/Utils/OsuHitObjectGenerationUtils.cs
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@ -210,10 +210,16 @@ namespace osu.Game.Rulesets.Osu.Utils
return (timeSinceTimingPoint + 1) % length < 2;
}
/// <summary>
/// Generates a random number from a normal distribution using the Box-Muller transform.
/// </summary>
public static float RandomGaussian(Random rng, float mean = 0, float stdDev = 1)
{
// Generate 2 random numbers in the interval (0,1].
// x1 must not be 0 since log(0) = undefined.
double x1 = 1 - rng.NextDouble();
double x2 = 1 - rng.NextDouble();
double stdNormal = Math.Sqrt(-2 * Math.Log(x1)) * Math.Sin(2 * Math.PI * x2);
return mean + stdDev * (float)stdNormal;
}