From 351ab6e9bdc290714dd79bdbe1585099d239d090 Mon Sep 17 00:00:00 2001 From: smoogipoo Date: Mon, 7 Jan 2019 17:57:45 +0900 Subject: [PATCH] Shortcut O(n^2) calculation --- .../Beatmaps/OsuBeatmapProcessor.cs | 62 ++++++++++--------- 1 file changed, 32 insertions(+), 30 deletions(-) diff --git a/osu.Game.Rulesets.Osu/Beatmaps/OsuBeatmapProcessor.cs b/osu.Game.Rulesets.Osu/Beatmaps/OsuBeatmapProcessor.cs index d9640d51ce..c1a9d2bafe 100644 --- a/osu.Game.Rulesets.Osu/Beatmaps/OsuBeatmapProcessor.cs +++ b/osu.Game.Rulesets.Osu/Beatmaps/OsuBeatmapProcessor.cs @@ -41,42 +41,44 @@ namespace osu.Game.Rulesets.Osu.Beatmaps if (endIndex < 0) throw new ArgumentOutOfRangeException(nameof(endIndex), $"{nameof(endIndex)} cannot be < 0."); int extendedEndIndex = endIndex; - - // Extend the end index to include objects they are stacked on - for (int i = endIndex; i >= startIndex; i--) + if (endIndex < beatmap.HitObjects.Count - 1) { - int stackBaseIndex = i; - for (int n = stackBaseIndex + 1; n < beatmap.HitObjects.Count; n++) + // Extend the end index to include objects they are stacked on + for (int i = endIndex; i >= startIndex; i--) { - OsuHitObject stackBaseObject = beatmap.HitObjects[stackBaseIndex]; - if (stackBaseObject is Spinner) break; - - OsuHitObject objectN = beatmap.HitObjects[n]; - if (objectN is Spinner) - continue; - - double endTime = (stackBaseObject as IHasEndTime)?.EndTime ?? stackBaseObject.StartTime; - double stackThreshold = objectN.TimePreempt * beatmap.BeatmapInfo.StackLeniency; - - if (objectN.StartTime - endTime > stackThreshold) - //We are no longer within stacking range of the next object. - break; - - if (Vector2Extensions.Distance(stackBaseObject.Position, objectN.Position) < stack_distance - || stackBaseObject is Slider && Vector2Extensions.Distance(stackBaseObject.EndPosition, objectN.Position) < stack_distance) + int stackBaseIndex = i; + for (int n = stackBaseIndex + 1; n < beatmap.HitObjects.Count; n++) { - stackBaseIndex = n; + OsuHitObject stackBaseObject = beatmap.HitObjects[stackBaseIndex]; + if (stackBaseObject is Spinner) break; - // HitObjects after the specified update range haven't been reset yet - objectN.StackHeight = 0; + OsuHitObject objectN = beatmap.HitObjects[n]; + if (objectN is Spinner) + continue; + + double endTime = (stackBaseObject as IHasEndTime)?.EndTime ?? stackBaseObject.StartTime; + double stackThreshold = objectN.TimePreempt * beatmap.BeatmapInfo.StackLeniency; + + if (objectN.StartTime - endTime > stackThreshold) + //We are no longer within stacking range of the next object. + break; + + if (Vector2Extensions.Distance(stackBaseObject.Position, objectN.Position) < stack_distance + || stackBaseObject is Slider && Vector2Extensions.Distance(stackBaseObject.EndPosition, objectN.Position) < stack_distance) + { + stackBaseIndex = n; + + // HitObjects after the specified update range haven't been reset yet + objectN.StackHeight = 0; + } } - } - if (stackBaseIndex > extendedEndIndex) - { - extendedEndIndex = stackBaseIndex; - if (extendedEndIndex == beatmap.HitObjects.Count - 1) - break; + if (stackBaseIndex > extendedEndIndex) + { + extendedEndIndex = stackBaseIndex; + if (extendedEndIndex == beatmap.HitObjects.Count - 1) + break; + } } }