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Code Issues Releases Wiki Activity

Make random implicitly null to avoid potential incorrect behaviour in randomBool

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This commit is contained in:
Dean Herbert 2022-09-09 17:55:29 +09:00
parent 5defb8b471
commit a2f96ea120
1 changed files with 10 additions and 14 deletions
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24
osu.Game.Rulesets.Osu/Mods/OsuModRandom.cs
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@ -27,7 +27,7 @@ namespace osu.Game.Rulesets.Osu.Mods
private static readonly float playfield_diagonal = OsuPlayfield.BASE_SIZE.LengthFast;
private Random? rng;
private Random random = null!;
public void ApplyToBeatmap(IBeatmap beatmap)
{
@ -36,7 +36,7 @@ namespace osu.Game.Rulesets.Osu.Mods
Seed.Value ??= RNG.Next();
rng = new Random((int)Seed.Value);
random = new Random((int)Seed.Value);
var positionInfos = OsuHitObjectGenerationUtils.GeneratePositionInfos(osuBeatmap.HitObjects);
@ -50,14 +50,14 @@ namespace osu.Game.Rulesets.Osu.Mods
{
if (shouldStartNewSection(osuBeatmap, positionInfos, i))
{
sectionOffset = OsuHitObjectGenerationUtils.RandomGaussian(rng, 0, 0.0008f);
sectionOffset = OsuHitObjectGenerationUtils.RandomGaussian(random, 0, 0.0008f);
flowDirection = !flowDirection;
}
if (i == 0)
{
positionInfos[i].DistanceFromPrevious = (float)(rng.NextDouble() * OsuPlayfield.BASE_SIZE.Y / 2);
positionInfos[i].RelativeAngle = (float)(rng.NextDouble() * 2 * Math.PI - Math.PI);
positionInfos[i].DistanceFromPrevious = (float)(random.NextDouble() * OsuPlayfield.BASE_SIZE.Y / 2);
positionInfos[i].RelativeAngle = (float)(random.NextDouble() * 2 * Math.PI - Math.PI);
}
else
{
@ -65,11 +65,11 @@ namespace osu.Game.Rulesets.Osu.Mods
float flowChangeOffset = 0;
// Offsets only the angle of the current hit object.
float oneTimeOffset = OsuHitObjectGenerationUtils.RandomGaussian(rng, 0, 0.002f);
float oneTimeOffset = OsuHitObjectGenerationUtils.RandomGaussian(random, 0, 0.002f);
if (shouldApplyFlowChange(positionInfos, i))
{
flowChangeOffset = OsuHitObjectGenerationUtils.RandomGaussian(rng, 0, 0.002f);
flowChangeOffset = OsuHitObjectGenerationUtils.RandomGaussian(random, 0, 0.002f);
flowDirection = !flowDirection;
}
@ -108,9 +108,9 @@ namespace osu.Game.Rulesets.Osu.Mods
bool previousObjectWasOnDownbeat = OsuHitObjectGenerationUtils.IsHitObjectOnBeat(beatmap, positionInfos[i - 1].HitObject, true);
bool previousObjectWasOnBeat = OsuHitObjectGenerationUtils.IsHitObjectOnBeat(beatmap, positionInfos[i - 1].HitObject);
return (previousObjectStartedCombo && randomBool(0.6f)) ||
return (previousObjectStartedCombo && random.NextDouble() < 0.6f) ||
previousObjectWasOnDownbeat ||
(previousObjectWasOnBeat && randomBool(0.4f));
(previousObjectWasOnBeat && random.NextDouble() < 0.4f);
}
/// <returns>Whether a flow change should be applied at the current <see cref="OsuHitObject"/>.</returns>
@ -120,11 +120,7 @@ namespace osu.Game.Rulesets.Osu.Mods
bool previousObjectStartedCombo = positionInfos[Math.Max(0, i - 2)].HitObject.IndexInCurrentCombo > 1 &&
positionInfos[i - 1].HitObject.NewCombo;
return previousObjectStartedCombo && randomBool(0.6f);
return previousObjectStartedCombo && random.NextDouble() < 0.6f;
}
/// <returns>true with a probability of <paramref name="probability"/>, false otherwise.</returns>
private bool randomBool(float probability) =>
rng?.NextDouble() < probability;
}
}