diff --git a/osu.Game/Rulesets/UI/Scrolling/Algorithms/OverlappingScrollAlgorithm.cs b/osu.Game/Rulesets/UI/Scrolling/Algorithms/OverlappingScrollAlgorithm.cs index 54079c7895..ead893c0af 100644 --- a/osu.Game/Rulesets/UI/Scrolling/Algorithms/OverlappingScrollAlgorithm.cs +++ b/osu.Game/Rulesets/UI/Scrolling/Algorithms/OverlappingScrollAlgorithm.cs @@ -1,9 +1,7 @@ // Copyright (c) ppy Pty Ltd . Licensed under the MIT Licence. // See the LICENCE file in the repository root for full licence text. -#nullable disable - -using System; +using System.Diagnostics; using System.Linq; using osu.Framework.Lists; using osu.Game.Beatmaps.ControlPoints; @@ -40,29 +38,16 @@ namespace osu.Game.Rulesets.UI.Scrolling.Algorithms public double TimeAt(float position, double currentTime, double timeRange, float scrollLength) { - // Find the control point relating to the position. + Debug.Assert(controlPoints.Count > 0); + + // Iterate over control points and find the most relevant for the provided position. // Note: Due to velocity adjustments, overlapping control points will provide multiple valid time values for a single position // As such, this operation provides unexpected results by using the latter of the control points. + var relevantControlPoint = controlPoints.LastOrDefault(cp => PositionAt(cp.Time, currentTime, timeRange, scrollLength) <= position) ?? controlPoints.First(); - int i = 0; - float pos = 0; + float positionAtControlPoint = PositionAt(relevantControlPoint.Time, currentTime, timeRange, scrollLength); - for (; i < controlPoints.Count; i++) - { - float lastPos = pos; - pos = PositionAt(controlPoints[i].Time, currentTime, timeRange, scrollLength); - - if (pos > position) - { - i--; - pos = lastPos; - break; - } - } - - i = Math.Clamp(i, 0, controlPoints.Count - 1); - - return controlPoints[i].Time + (position - pos) * timeRange / controlPoints[i].Multiplier / scrollLength; + return relevantControlPoint.Time + (position - positionAtControlPoint) * timeRange / relevantControlPoint.Multiplier / scrollLength; } public void Reset()