From 0e1ec703d33907268dbb2acc49f3e8e19318ae2b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bart=C5=82omiej=20Dach?= Date: Sun, 31 Jan 2021 17:56:03 +0100 Subject: [PATCH] Use IApplicableToRate in osu! auto generator --- .../Replays/OsuAutoGenerator.cs | 42 ++++++++++------- .../Replays/OsuAutoGeneratorBase.cs | 47 +++++++++++++++---- 2 files changed, 62 insertions(+), 27 deletions(-) diff --git a/osu.Game.Rulesets.Osu/Replays/OsuAutoGenerator.cs b/osu.Game.Rulesets.Osu/Replays/OsuAutoGenerator.cs index e4b6f6425d..693943a08a 100644 --- a/osu.Game.Rulesets.Osu/Replays/OsuAutoGenerator.cs +++ b/osu.Game.Rulesets.Osu/Replays/OsuAutoGenerator.cs @@ -35,11 +35,6 @@ namespace osu.Game.Rulesets.Osu.Replays #region Constants - /// - /// The "reaction time" in ms between "seeing" a new hit object and moving to "react" to it. - /// - private readonly double reactionTime; - private readonly HitWindows defaultHitWindows; /// @@ -54,9 +49,6 @@ namespace osu.Game.Rulesets.Osu.Replays public OsuAutoGenerator(IBeatmap beatmap, IReadOnlyList mods) : base(beatmap, mods) { - // Already superhuman, but still somewhat realistic - reactionTime = ApplyModsToRate(100); - defaultHitWindows = new OsuHitWindows(); defaultHitWindows.SetDifficulty(Beatmap.BeatmapInfo.BaseDifficulty.OverallDifficulty); } @@ -242,7 +234,7 @@ namespace osu.Game.Rulesets.Osu.Replays OsuReplayFrame lastFrame = (OsuReplayFrame)Frames[^1]; // Wait until Auto could "see and react" to the next note. - double waitTime = h.StartTime - Math.Max(0.0, h.TimePreempt - reactionTime); + double waitTime = h.StartTime - Math.Max(0.0, h.TimePreempt - getReactionTime(h.StartTime - h.TimePreempt)); if (waitTime > lastFrame.Time) { @@ -252,7 +244,7 @@ namespace osu.Game.Rulesets.Osu.Replays Vector2 lastPosition = lastFrame.Position; - double timeDifference = ApplyModsToTime(h.StartTime - lastFrame.Time); + double timeDifference = ApplyModsToTimeDelta(lastFrame.Time, h.StartTime); // Only "snap" to hitcircles if they are far enough apart. As the time between hitcircles gets shorter the snapping threshold goes up. if (timeDifference > 0 && // Sanity checks @@ -260,7 +252,7 @@ namespace osu.Game.Rulesets.Osu.Replays timeDifference >= 266)) // ... or the beats are slow enough to tap anyway. { // Perform eased movement - for (double time = lastFrame.Time + FrameDelay; time < h.StartTime; time += FrameDelay) + for (double time = lastFrame.Time + GetFrameDelay(lastFrame.Time); time < h.StartTime; time += GetFrameDelay(time)) { Vector2 currentPosition = Interpolation.ValueAt(time, lastPosition, targetPos, lastFrame.Time, h.StartTime, easing); AddFrameToReplay(new OsuReplayFrame((int)time, new Vector2(currentPosition.X, currentPosition.Y)) { Actions = lastFrame.Actions }); @@ -274,6 +266,14 @@ namespace osu.Game.Rulesets.Osu.Replays } } + /// + /// Calculates the "reaction time" in ms between "seeing" a new hit object and moving to "react" to it. + /// + /// + /// Already superhuman, but still somewhat realistic. + /// + private double getReactionTime(double timeInstant) => ApplyModsToRate(timeInstant, 100); + // Add frames to click the hitobject private void addHitObjectClickFrames(OsuHitObject h, Vector2 startPosition, float spinnerDirection) { @@ -343,17 +343,23 @@ namespace osu.Game.Rulesets.Osu.Replays float angle = radius == 0 ? 0 : MathF.Atan2(difference.Y, difference.X); double t; + double previousFrame = h.StartTime; - for (double j = h.StartTime + FrameDelay; j < spinner.EndTime; j += FrameDelay) + for (double nextFrame = h.StartTime + GetFrameDelay(h.StartTime); nextFrame < spinner.EndTime; nextFrame += GetFrameDelay(nextFrame)) { - t = ApplyModsToTime(j - h.StartTime) * spinnerDirection; + t = ApplyModsToTimeDelta(previousFrame, nextFrame) * spinnerDirection; + angle += (float)t / 20; - Vector2 pos = SPINNER_CENTRE + CirclePosition(t / 20 + angle, SPIN_RADIUS); - AddFrameToReplay(new OsuReplayFrame((int)j, new Vector2(pos.X, pos.Y), action)); + Vector2 pos = SPINNER_CENTRE + CirclePosition(angle, SPIN_RADIUS); + AddFrameToReplay(new OsuReplayFrame((int)nextFrame, new Vector2(pos.X, pos.Y), action)); + + previousFrame = nextFrame; } - t = ApplyModsToTime(spinner.EndTime - h.StartTime) * spinnerDirection; - Vector2 endPosition = SPINNER_CENTRE + CirclePosition(t / 20 + angle, SPIN_RADIUS); + t = ApplyModsToTimeDelta(previousFrame, spinner.EndTime) * spinnerDirection; + angle += (float)t / 20; + + Vector2 endPosition = SPINNER_CENTRE + CirclePosition(angle, SPIN_RADIUS); AddFrameToReplay(new OsuReplayFrame(spinner.EndTime, new Vector2(endPosition.X, endPosition.Y), action)); @@ -361,7 +367,7 @@ namespace osu.Game.Rulesets.Osu.Replays break; case Slider slider: - for (double j = FrameDelay; j < slider.Duration; j += FrameDelay) + for (double j = GetFrameDelay(slider.StartTime); j < slider.Duration; j += GetFrameDelay(slider.StartTime + j)) { Vector2 pos = slider.StackedPositionAt(j / slider.Duration); AddFrameToReplay(new OsuReplayFrame(h.StartTime + j, new Vector2(pos.X, pos.Y), action)); diff --git a/osu.Game.Rulesets.Osu/Replays/OsuAutoGeneratorBase.cs b/osu.Game.Rulesets.Osu/Replays/OsuAutoGeneratorBase.cs index f88594a3ee..1cb3208c30 100644 --- a/osu.Game.Rulesets.Osu/Replays/OsuAutoGeneratorBase.cs +++ b/osu.Game.Rulesets.Osu/Replays/OsuAutoGeneratorBase.cs @@ -5,6 +5,7 @@ using osuTK; using osu.Game.Beatmaps; using System; using System.Collections.Generic; +using System.Linq; using osu.Game.Replays; using osu.Game.Rulesets.Mods; using osu.Game.Rulesets.Osu.UI; @@ -23,33 +24,61 @@ namespace osu.Game.Rulesets.Osu.Replays public const float SPIN_RADIUS = 50; - /// - /// The time in ms between each ReplayFrame. - /// - protected readonly double FrameDelay; - #endregion #region Construction / Initialisation protected Replay Replay; protected List Frames => Replay.Frames; + private readonly IReadOnlyList timeAffectingMods; protected OsuAutoGeneratorBase(IBeatmap beatmap, IReadOnlyList mods) : base(beatmap) { Replay = new Replay(); - // We are using ApplyModsToRate and not ApplyModsToTime to counteract the speed up / slow down from HalfTime / DoubleTime so that we remain at a constant framerate of 60 fps. - FrameDelay = ApplyModsToRate(1000.0 / 60.0); + timeAffectingMods = mods.OfType().ToList(); } #endregion #region Utilities - protected double ApplyModsToTime(double v) => v; - protected double ApplyModsToRate(double v) => v; + /// + /// Returns the real duration of time between and + /// after applying rate-affecting mods. + /// + /// + /// This method should only be used when and are very close. + /// That is because the track rate might be changing with time, + /// and the method used here is a rough instantaneous approximation. + /// + /// The start time of the time delta, in original track time. + /// The end time of the time delta, in original track time. + protected double ApplyModsToTimeDelta(double startTime, double endTime) + { + double delta = endTime - startTime; + + foreach (var mod in timeAffectingMods) + delta /= mod.ApplyToRate(startTime); + + return delta; + } + + protected double ApplyModsToRate(double time, double rate) + { + foreach (var mod in timeAffectingMods) + rate = mod.ApplyToRate(time, rate); + return rate; + } + + /// + /// Calculates the interval after which the next should be generated, + /// in milliseconds. + /// + /// The time of the previous frame. + protected double GetFrameDelay(double time) + => ApplyModsToRate(time, 1000.0 / 60); private class ReplayFrameComparer : IComparer {