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Fix CalculateAverageHitError throwing if there are zero HitEvents

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This commit is contained in:
Dean Herbert 2022-03-01 16:02:48 +09:00
parent 350b0b488c
commit 7215f3f66b
1 changed files with 9 additions and 2 deletions
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11
osu.Game/Rulesets/Scoring/HitEventExtensions.cs
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@ -29,8 +29,15 @@ namespace osu.Game.Rulesets.Scoring
/// A non-null <see langword="double"/> value if unstable rate could be calculated,
/// and <see langword="null"/> if unstable rate cannot be calculated due to <paramref name="hitEvents"/> being empty.
/// </returns>
public static double? CalculateAverageHitError(this IEnumerable<HitEvent> hitEvents) =>
hitEvents.Where(affectsUnstableRate).Select(ev => ev.TimeOffset).Average();
public static double? CalculateAverageHitError(this IEnumerable<HitEvent> hitEvents)
{
double[] timeOffsets = hitEvents.Where(affectsUnstableRate).Select(ev => ev.TimeOffset).ToArray();
if (timeOffsets.Length == 0)
return null;
return timeOffsets.Average();
}
private static bool affectsUnstableRate(HitEvent e) => !(e.HitObject.HitWindows is HitWindows.EmptyHitWindows) && e.Result.IsHit();