Merge pull request #24280 from tybug/stable-notelock

Correctly implement stable notelock in Classic mod

osu.Game.Rulesets.Osu.Tests/TestSceneHitCircle.cs

@@ -131,7 +131,7 @@ namespace osu.Game.Rulesets.Osu.Tests
 
             protected override void CheckForResult(bool userTriggered, double timeOffset)
             {
-                if (auto && !userTriggered && timeOffset > hitOffset && CheckHittable?.Invoke(this, Time.Current) != false)
+                if (auto && !userTriggered && timeOffset > hitOffset && CheckHittable?.Invoke(this, Time.Current, HitResult.Great) == ClickAction.Hit)
                 {
                     // force success
                     ApplyResult(r => r.Type = HitResult.Great);

osu.Game.Rulesets.Osu.Tests/TestSceneHitCircleLateFade.cs

@@ -204,7 +204,7 @@ namespace osu.Game.Rulesets.Osu.Tests
 
             protected override void CheckForResult(bool userTriggered, double timeOffset)
             {
-                if (shouldHit && !userTriggered && timeOffset >= 0 && CheckHittable?.Invoke(this, Time.Current) != false)
+                if (shouldHit && !userTriggered && timeOffset >= 0)
                 {
                     // force success
                     ApplyResult(r => r.Type = HitResult.Great);

osu.Game.Rulesets.Osu.Tests/TestSceneLegacyHitPolicy.cs

@@ -11,17 +11,21 @@ using NUnit.Framework;
 using osu.Framework.Extensions;
 using osu.Framework.Extensions.TypeExtensions;
 using osu.Framework.Screens;
+using osu.Framework.Testing;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Beatmaps.Formats;
 using osu.Game.Replays;
 using osu.Game.Rulesets.Judgements;
+using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Osu.Mods;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.Replays;
 using osu.Game.Rulesets.Osu.Scoring;
+using osu.Game.Rulesets.Osu.UI;
 using osu.Game.Rulesets.Replays;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Scoring;
@@ -32,7 +36,7 @@ using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Tests
 {
-    public partial class TestSceneObjectOrderedHitPolicy : RateAdjustedBeatmapTestScene
+    public partial class TestSceneLegacyHitPolicy : RateAdjustedBeatmapTestScene
     {
         private readonly OsuHitWindows referenceHitWindows;
 
@@ -43,7 +47,7 @@ namespace osu.Game.Rulesets.Osu.Tests
         /// </summary>
         private readonly string? exportLocation = null;
 
-        public TestSceneObjectOrderedHitPolicy()
+        public TestSceneLegacyHitPolicy()
         {
             referenceHitWindows = new OsuHitWindows();
             referenceHitWindows.SetDifficulty(0);
@@ -83,6 +87,7 @@ namespace osu.Game.Rulesets.Osu.Tests
             addJudgementAssert(hitObjects[1], HitResult.Miss);
             // note lock prevented the object from being hit, so the judgement offset should be very late.
             addJudgementOffsetAssert(hitObjects[0], referenceHitWindows.WindowFor(HitResult.Meh));
+            addClickActionAssert(0, ClickAction.Shake);
         }
 
         /// <summary>
@@ -119,6 +124,7 @@ namespace osu.Game.Rulesets.Osu.Tests
             addJudgementAssert(hitObjects[1], HitResult.Miss);
             // note lock prevented the object from being hit, so the judgement offset should be very late.
             addJudgementOffsetAssert(hitObjects[0], referenceHitWindows.WindowFor(HitResult.Meh));
+            addClickActionAssert(0, ClickAction.Shake);
         }
 
         /// <summary>
@@ -155,6 +161,7 @@ namespace osu.Game.Rulesets.Osu.Tests
             addJudgementAssert(hitObjects[1], HitResult.Miss);
             // note lock prevented the object from being hit, so the judgement offset should be very late.
             addJudgementOffsetAssert(hitObjects[0], referenceHitWindows.WindowFor(HitResult.Meh));
+            addClickActionAssert(0, ClickAction.Shake);
         }
 
         /// <summary>
@@ -191,7 +198,9 @@ namespace osu.Game.Rulesets.Osu.Tests
             addJudgementAssert(hitObjects[0], HitResult.Meh);
             addJudgementAssert(hitObjects[1], HitResult.Meh);
             addJudgementOffsetAssert(hitObjects[0], -190); // time_first_circle - 190
-            addJudgementOffsetAssert(hitObjects[0], -90); // time_second_circle - first_circle_time - 90
+            addJudgementOffsetAssert(hitObjects[1], -190); // time_second_circle - first_circle_time - 90
+            addClickActionAssert(0, ClickAction.Hit);
+            addClickActionAssert(1, ClickAction.Hit);
         }
 
         /// <summary>
@@ -229,13 +238,15 @@ namespace osu.Game.Rulesets.Osu.Tests
             addJudgementAssert(hitObjects[1], HitResult.Ok);
             addJudgementOffsetAssert(hitObjects[0], -190); // time_first_circle - 190
             addJudgementOffsetAssert(hitObjects[1], -100); // time_second_circle - first_circle_time
+            addClickActionAssert(0, ClickAction.Hit);
+            addClickActionAssert(1, ClickAction.Hit);
         }
 
         /// <summary>
-        /// Tests clicking a future circle after a slider's start time, but hitting all slider ticks.
+        /// Tests clicking a future circle after a slider's start time, but hitting the slider head and all slider ticks.
         /// </summary>
         [Test]
-        public void TestMissSliderHeadAndHitAllSliderTicks()
+        public void TestHitCircleBeforeSliderHead()
         {
             const double time_slider = 1500;
             const double time_circle = 1510;
@@ -267,10 +278,12 @@ namespace osu.Game.Rulesets.Osu.Tests
                 new OsuReplayFrame { Time = time_slider + 10, Position = positionSlider, Actions = { OsuAction.RightButton } }
             });
 
-            addJudgementAssert(hitObjects[0], HitResult.Miss);
+            addJudgementAssert(hitObjects[0], HitResult.Great);
             addJudgementAssert(hitObjects[1], HitResult.Great);
             addJudgementAssert("slider head", () => ((Slider)hitObjects[1]).HeadCircle, HitResult.LargeTickHit);
             addJudgementAssert("slider tick", () => ((Slider)hitObjects[1]).NestedHitObjects[1] as SliderTick, HitResult.LargeTickHit);
+            addClickActionAssert(0, ClickAction.Hit);
+            addClickActionAssert(1, ClickAction.Hit);
         }
 
         /// <summary>
@@ -314,6 +327,8 @@ namespace osu.Game.Rulesets.Osu.Tests
             addJudgementAssert(hitObjects[1], HitResult.Great);
             addJudgementAssert("slider head", () => ((Slider)hitObjects[1]).HeadCircle, HitResult.LargeTickHit);
             addJudgementAssert("slider tick", () => ((Slider)hitObjects[1]).NestedHitObjects[1] as SliderTick, HitResult.LargeTickHit);
+            addClickActionAssert(0, ClickAction.Hit);
+            addClickActionAssert(1, ClickAction.Hit);
         }
 
         /// <summary>
@@ -353,6 +368,7 @@ namespace osu.Game.Rulesets.Osu.Tests
 
             addJudgementAssert(hitObjects[0], HitResult.Great);
             addJudgementAssert(hitObjects[1], HitResult.Meh);
+            addClickActionAssert(0, ClickAction.Hit);
         }
 
         [Test]
@@ -391,6 +407,102 @@ namespace osu.Game.Rulesets.Osu.Tests
 
             addJudgementAssert(hitObjects[0], HitResult.Great);
             addJudgementAssert(hitObjects[1], HitResult.Great);
+            addClickActionAssert(0, ClickAction.Shake);
+            addClickActionAssert(1, ClickAction.Hit);
+            addClickActionAssert(2, ClickAction.Hit);
+        }
+
+        [Test]
+        public void TestOverlappingSliders()
+        {
+            const double time_first_slider = 1000;
+            const double time_second_slider = 1200;
+            Vector2 positionFirstSlider = new Vector2(100, 50);
+            Vector2 positionSecondSlider = new Vector2(100, 80);
+            var midpoint = (positionFirstSlider + positionSecondSlider) / 2;
+
+            var hitObjects = new List<OsuHitObject>
+            {
+                new Slider
+                {
+                    StartTime = time_first_slider,
+                    Position = positionFirstSlider,
+                    Path = new SliderPath(PathType.Linear, new[]
+                    {
+                        Vector2.Zero,
+                        new Vector2(25, 0),
+                    })
+                },
+                new Slider
+                {
+                    StartTime = time_second_slider,
+                    Position = positionSecondSlider,
+                    Path = new SliderPath(PathType.Linear, new[]
+                    {
+                        Vector2.Zero,
+                        new Vector2(25, 0),
+                    })
+                }
+            };
+
+            performTest(hitObjects, new List<ReplayFrame>
+            {
+                new OsuReplayFrame { Time = time_first_slider, Position = midpoint, Actions = { OsuAction.RightButton } },
+                new OsuReplayFrame { Time = time_first_slider + 25, Position = midpoint, Actions = { OsuAction.LeftButton, OsuAction.RightButton } },
+                new OsuReplayFrame { Time = time_first_slider + 50, Position = midpoint },
+                new OsuReplayFrame { Time = time_second_slider, Position = positionSecondSlider + new Vector2(0, 10), Actions = { OsuAction.LeftButton } },
+            });
+
+            addJudgementAssert(hitObjects[0], HitResult.Ok);
+            addJudgementAssert(hitObjects[1], HitResult.Great);
+            addClickActionAssert(0, ClickAction.Hit);
+            addClickActionAssert(1, ClickAction.Hit);
+        }
+
+        [Test]
+        public void TestStacksDoNotShake()
+        {
+            const double time_stack_start = 1000;
+            Vector2 position = new Vector2(80);
+
+            var hitObjects = Enumerable.Range(0, 20).Select(i => new HitCircle
+            {
+                StartTime = time_stack_start + i * 100,
+                Position = position
+            }).Cast<OsuHitObject>().ToList();
+
+            performTest(hitObjects, new List<ReplayFrame>
+            {
+                new OsuReplayFrame { Time = time_stack_start - 450, Position = new Vector2(55), Actions = { OsuAction.LeftButton } },
+            });
+
+            addClickActionAssert(0, ClickAction.Ignore);
+        }
+
+        [Test]
+        public void TestAutopilotReducesHittableRange()
+        {
+            const double time_circle = 1500;
+            Vector2 positionCircle = Vector2.Zero;
+
+            var hitObjects = new List<OsuHitObject>
+            {
+                new HitCircle
+                {
+                    StartTime = time_circle,
+                    Position = positionCircle
+                },
+            };
+
+            performTest(hitObjects, new List<ReplayFrame>
+            {
+                new OsuReplayFrame { Time = time_circle - 250, Position = positionCircle, Actions = { OsuAction.LeftButton } }
+            }, new Mod[] { new OsuModAutopilot() });
+
+            addJudgementAssert(hitObjects[0], HitResult.Miss);
+            // note lock prevented the object from being hit, so the judgement offset should be very late.
+            addJudgementOffsetAssert(hitObjects[0], referenceHitWindows.WindowFor(HitResult.Meh));
+            addClickActionAssert(0, ClickAction.Shake);
         }
 
         private void addJudgementAssert(OsuHitObject hitObject, HitResult result)
@@ -408,17 +520,30 @@ namespace osu.Game.Rulesets.Osu.Tests
         private void addJudgementOffsetAssert(OsuHitObject hitObject, double offset)
         {
             AddAssert($"({hitObject.GetType().ReadableName()} @ {hitObject.StartTime}) judged at {offset}",
-                () => judgementResults.Single(r => r.HitObject == hitObject).TimeOffset, () => Is.EqualTo(offset).Within(100));
+                () => judgementResults.Single(r => r.HitObject == hitObject).TimeOffset, () => Is.EqualTo(offset).Within(50));
         }
 
+        private void addClickActionAssert(int inputIndex, ClickAction action)
+            => AddAssert($"input #{inputIndex} resulted in {action}", () => testPolicy.ClickActions[inputIndex], () => Is.EqualTo(action));
+
         private ScoreAccessibleReplayPlayer currentPlayer = null!;
         private List<JudgementResult> judgementResults = null!;
+        private TestLegacyHitPolicy testPolicy = null!;
 
-        private void performTest(List<OsuHitObject> hitObjects, List<ReplayFrame> frames, [CallerMemberName] string testCaseName = "")
+        private void performTest(List<OsuHitObject> hitObjects, List<ReplayFrame> frames, IEnumerable<Mod>? extraMods = null, [CallerMemberName] string testCaseName = "")
         {
+            List<Mod> mods = null!;
             IBeatmap playableBeatmap = null!;
             Score score = null!;
 
+            AddStep("set up mods", () =>
+            {
+                mods = new List<Mod> { new OsuModClassic() };
+
+                if (extraMods != null)
+                    mods.AddRange(extraMods);
+            });
+
             AddStep("create beatmap", () =>
             {
                 var cpi = new ControlPointInfo();
@@ -461,7 +586,8 @@ namespace osu.Game.Rulesets.Osu.Tests
                     ScoreInfo =
                     {
                         Ruleset = new OsuRuleset().RulesetInfo,
-                        BeatmapInfo = playableBeatmap.BeatmapInfo
+                        BeatmapInfo = playableBeatmap.BeatmapInfo,
+                        Mods = mods.ToArray()
                     }
                 };
             });
@@ -495,7 +621,7 @@ namespace osu.Game.Rulesets.Osu.Tests
 
             AddStep("load player", () =>
             {
-                SelectedMods.Value = new[] { new OsuModClassic() };
+                SelectedMods.Value = mods.ToArray();
 
                 var p = new ScoreAccessibleReplayPlayer(score);
 
@@ -513,6 +639,12 @@ namespace osu.Game.Rulesets.Osu.Tests
 
             AddUntilStep("Beatmap at 0", () => Beatmap.Value.Track.CurrentTime == 0);
             AddUntilStep("Wait until player is loaded", () => currentPlayer.IsCurrentScreen());
+            AddStep("Substitute hit policy", () =>
+            {
+                var playfield = currentPlayer.ChildrenOfType<OsuPlayfield>().Single();
+                var currentPolicy = playfield.HitPolicy;
+                playfield.HitPolicy = testPolicy = new TestLegacyHitPolicy(currentPolicy);
+            });
             AddUntilStep("Wait for completion", () => currentPlayer.ScoreProcessor.HasCompleted.Value);
         }
 
@@ -540,5 +672,24 @@ namespace osu.Game.Rulesets.Osu.Tests
             {
             }
         }
+
+        private class TestLegacyHitPolicy : LegacyHitPolicy
+        {
+            private readonly IHitPolicy currentPolicy;
+
+            public TestLegacyHitPolicy(IHitPolicy currentPolicy)
+            {
+                this.currentPolicy = currentPolicy;
+            }
+
+            public List<ClickAction> ClickActions { get; } = new List<ClickAction>();
+
+            public override ClickAction CheckHittable(DrawableHitObject hitObject, double time, HitResult result)
+            {
+                var action = currentPolicy.CheckHittable(hitObject, time, result);
+                ClickActions.Add(action);
+                return action;
+            }
+        }
     }
 }

osu.Game.Rulesets.Osu/Mods/OsuModClassic.cs

@@ -11,6 +11,7 @@ using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Scoring;
 using osu.Game.Rulesets.Osu.UI;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Rulesets.UI;
@@ -57,7 +58,10 @@ namespace osu.Game.Rulesets.Osu.Mods
             var osuRuleset = (DrawableOsuRuleset)drawableRuleset;
 
             if (ClassicNoteLock.Value)
-                osuRuleset.Playfield.HitPolicy = new ObjectOrderedHitPolicy();
+            {
+                double hittableRange = OsuHitWindows.MISS_WINDOW - (drawableRuleset.Mods.OfType<OsuModAutopilot>().Any() ? 200 : 0);
+                osuRuleset.Playfield.HitPolicy = new LegacyHitPolicy(hittableRange);
+            }
 
             usingHiddenFading = drawableRuleset.Mods.OfType<OsuModHidden>().SingleOrDefault()?.OnlyFadeApproachCircles.Value == false;
         }

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableHitCircle.cs

@@ -18,6 +18,7 @@ using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Osu.Judgements;
 using osu.Game.Rulesets.Osu.Skinning;
 using osu.Game.Rulesets.Osu.Skinning.Default;
+using osu.Game.Rulesets.Osu.UI;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Skinning;
 using osuTK;
@@ -154,12 +155,13 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             }
 
             var result = ResultFor(timeOffset);
+            var clickAction = CheckHittable?.Invoke(this, Time.Current, result);
 
-            if (result == HitResult.None || CheckHittable?.Invoke(this, Time.Current) == false)
+            if (clickAction == ClickAction.Shake)
-            {
                 Shake();
+
+            if (result == HitResult.None || clickAction != ClickAction.Hit)
                 return;
-            }
 
             ApplyResult(r =>
             {

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableOsuHitObject.cs

@@ -12,6 +12,8 @@ using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Osu.Judgements;
 using osu.Game.Rulesets.Osu.Scoring;
+using osu.Game.Rulesets.Osu.UI;
+using osu.Game.Rulesets.Scoring;
 using osuTK;
 using osuTK.Graphics;
 
@@ -30,10 +32,13 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
         protected override float SamplePlaybackPosition => CalculateDrawableRelativePosition(this);
 
         /// <summary>
-        /// Whether this <see cref="DrawableOsuHitObject"/> can be hit, given a time value.
+        /// What action this <see cref="DrawableOsuHitObject"/> should take in response to a
-        /// If non-null, judgements will be ignored (resulting in a shake) whilst the function returns false.
+        /// click at the given time value.
+        /// If non-null, judgements will be ignored for return values of <see cref="ClickAction.Ignore"/>
+        /// and <see cref="ClickAction.Shake"/>, and this hit object will be shaken for return values of
+        /// <see cref="ClickAction.Shake"/>.
         /// </summary>
-        public Func<DrawableHitObject, double, bool> CheckHittable;
+        public Func<DrawableHitObject, double, HitResult, ClickAction> CheckHittable;
 
         protected DrawableOsuHitObject(OsuHitObject hitObject)
             : base(hitObject)

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableSliderHead.cs

@@ -8,6 +8,7 @@ using System.Diagnostics;
 using JetBrains.Annotations;
 using osu.Framework.Bindables;
 using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Osu.UI;
 using osu.Game.Rulesets.Scoring;
 
 namespace osu.Game.Rulesets.Osu.Objects.Drawables
@@ -60,7 +61,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
             pathVersion.BindTo(DrawableSlider.PathVersion);
 
-            CheckHittable = (d, t) => DrawableSlider.CheckHittable?.Invoke(d, t) ?? true;
+            CheckHittable = (d, t, r) => DrawableSlider.CheckHittable?.Invoke(d, t, r) ?? ClickAction.Hit;
         }
 
         protected override void Update()

osu.Game.Rulesets.Osu/UI/AnyOrderHitPolicy.cs

@@ -1,9 +1,8 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Scoring;
 using osu.Game.Rulesets.UI;
 
 namespace osu.Game.Rulesets.Osu.UI
@@ -13,9 +12,9 @@ namespace osu.Game.Rulesets.Osu.UI
     /// </summary>
     public class AnyOrderHitPolicy : IHitPolicy
     {
-        public IHitObjectContainer HitObjectContainer { get; set; }
+        public IHitObjectContainer HitObjectContainer { get; set; } = null!;
 
-        public bool IsHittable(DrawableHitObject hitObject, double time) => true;
+        public ClickAction CheckHittable(DrawableHitObject hitObject, double time, HitResult result) => ClickAction.Hit;
 
         public void HandleHit(DrawableHitObject hitObject)
         {

osu.Game.Rulesets.Osu/UI/ClickAction.cs

@@ -0,0 +1,18 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+
+namespace osu.Game.Rulesets.Osu.UI
+{
+    /// <summary>
+    /// An action that an <see cref="IHitPolicy"/> recommends be taken in response to a click
+    /// on a <see cref="DrawableOsuHitObject"/>.
+    /// </summary>
+    public enum ClickAction
+    {
+        Ignore,
+        Shake,
+        Hit
+    }
+}

osu.Game.Rulesets.Osu/UI/IHitPolicy.cs

@@ -3,6 +3,7 @@
 
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Scoring;
 using osu.Game.Rulesets.UI;
 
 namespace osu.Game.Rulesets.Osu.UI
@@ -19,8 +20,9 @@ namespace osu.Game.Rulesets.Osu.UI
         /// </summary>
         /// <param name="hitObject">The <see cref="DrawableHitObject"/> to check.</param>
         /// <param name="time">The time to check.</param>
+        /// <param name="result">The result that the object would be judged with if hit.</param>
         /// <returns>Whether <paramref name="hitObject"/> can be hit at the given <paramref name="time"/>.</returns>
-        bool IsHittable(DrawableHitObject hitObject, double time);
+        ClickAction CheckHittable(DrawableHitObject hitObject, double time, HitResult result);
 
         /// <summary>
         /// Handles a <see cref="HitObject"/> being hit.

osu.Game.Rulesets.Osu/UI/LegacyHitPolicy.cs

@@ -0,0 +1,72 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Linq;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Scoring;
+using osu.Game.Rulesets.Scoring;
+using osu.Game.Rulesets.UI;
+
+namespace osu.Game.Rulesets.Osu.UI
+{
+    /// <summary>
+    /// Ensures that <see cref="HitObject"/>s are hit in order of appearance. The classic note lock.
+    /// <remarks>
+    /// Hits will be blocked until the previous <see cref="HitObject"/>s have been judged.
+    /// </remarks>
+    /// </summary>
+    public class LegacyHitPolicy : IHitPolicy
+    {
+        public IHitObjectContainer? HitObjectContainer { get; set; }
+
+        private readonly double hittableRange;
+
+        public LegacyHitPolicy(double hittableRange = OsuHitWindows.MISS_WINDOW)
+        {
+            this.hittableRange = hittableRange;
+        }
+
+        public void HandleHit(DrawableHitObject hitObject)
+        {
+        }
+
+        public virtual ClickAction CheckHittable(DrawableHitObject hitObject, double time, HitResult result)
+        {
+            if (HitObjectContainer == null)
+                throw new InvalidOperationException($"{nameof(HitObjectContainer)} should be set before {nameof(CheckHittable)} is called.");
+
+            var aliveObjects = HitObjectContainer.AliveObjects.ToList();
+            int index = aliveObjects.IndexOf(hitObject);
+
+            if (index > 0)
+            {
+                var previousHitObject = (DrawableOsuHitObject)aliveObjects[index - 1];
+                if (previousHitObject.HitObject.StackHeight > 0 && !previousHitObject.AllJudged)
+                    return ClickAction.Ignore;
+            }
+
+            if (result == HitResult.None)
+                return ClickAction.Shake;
+
+            foreach (DrawableHitObject testObject in aliveObjects)
+            {
+                if (testObject.AllJudged)
+                    continue;
+
+                // if we found the object being checked, we can move on to the final timing test.
+                if (testObject == hitObject)
+                    break;
+
+                // for all other objects, we check for validity and block the hit if any are still valid.
+                // 3ms of extra leniency to account for slightly unsnapped objects.
+                if (testObject.HitObject.GetEndTime() + 3 < hitObject.HitObject.StartTime)
+                    return ClickAction.Shake;
+            }
+
+            return Math.Abs(hitObject.HitObject.StartTime - time) < hittableRange ? ClickAction.Hit : ClickAction.Shake;
+        }
+    }
+}

osu.Game.Rulesets.Osu/UI/ObjectOrderedHitPolicy.cs

@@ -1,56 +0,0 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
-// See the LICENCE file in the repository root for full licence text.
-
-#nullable disable
-
-using System.Collections.Generic;
-using System.Linq;
-using osu.Game.Rulesets.Objects;
-using osu.Game.Rulesets.Objects.Drawables;
-using osu.Game.Rulesets.Osu.Objects.Drawables;
-using osu.Game.Rulesets.UI;
-
-namespace osu.Game.Rulesets.Osu.UI
-{
-    /// <summary>
-    /// Ensures that <see cref="HitObject"/>s are hit in order of appearance. The classic note lock.
-    /// <remarks>
-    /// Hits will be blocked until the previous <see cref="HitObject"/>s have been judged.
-    /// </remarks>
-    /// </summary>
-    public class ObjectOrderedHitPolicy : IHitPolicy
-    {
-        public IHitObjectContainer HitObjectContainer { get; set; }
-
-        public bool IsHittable(DrawableHitObject hitObject, double time) => enumerateHitObjectsUpTo(hitObject.HitObject.StartTime).All(obj => obj.AllJudged);
-
-        public void HandleHit(DrawableHitObject hitObject)
-        {
-        }
-
-        private IEnumerable<DrawableHitObject> enumerateHitObjectsUpTo(double targetTime)
-        {
-            foreach (var obj in HitObjectContainer.AliveObjects)
-            {
-                if (obj.HitObject.StartTime >= targetTime)
-                    yield break;
-
-                switch (obj)
-                {
-                    case DrawableSpinner:
-                        continue;
-
-                    case DrawableSlider slider:
-                        yield return slider.HeadCircle;
-
-                        break;
-
-                    default:
-                        yield return obj;
-
-                        break;
-                }
-            }
-        }
-    }
-}

osu.Game.Rulesets.Osu/UI/OsuPlayfield.cs

@@ -89,7 +89,7 @@ namespace osu.Game.Rulesets.Osu.UI
 
         protected override void OnNewDrawableHitObject(DrawableHitObject drawable)
         {
-            ((DrawableOsuHitObject)drawable).CheckHittable = hitPolicy.IsHittable;
+            ((DrawableOsuHitObject)drawable).CheckHittable = hitPolicy.CheckHittable;
 
             Debug.Assert(!drawable.IsLoaded, $"Already loaded {nameof(DrawableHitObject)} is added to {nameof(OsuPlayfield)}");
             drawable.OnLoadComplete += onDrawableHitObjectLoaded;

osu.Game.Rulesets.Osu/UI/StartTimeOrderedHitPolicy.cs

@@ -1,13 +1,12 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using System;
 using System.Collections.Generic;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Rulesets.Scoring;
 using osu.Game.Rulesets.UI;
 
 namespace osu.Game.Rulesets.Osu.UI
@@ -22,11 +21,14 @@ namespace osu.Game.Rulesets.Osu.UI
     /// </summary>
     public class StartTimeOrderedHitPolicy : IHitPolicy
     {
-        public IHitObjectContainer HitObjectContainer { get; set; }
+        public IHitObjectContainer? HitObjectContainer { get; set; }
 
-        public bool IsHittable(DrawableHitObject hitObject, double time)
+        public ClickAction CheckHittable(DrawableHitObject hitObject, double time, HitResult _)
         {
-            DrawableHitObject blockingObject = null;
+            if (HitObjectContainer == null)
+                throw new InvalidOperationException($"{nameof(HitObjectContainer)} should be set before {nameof(CheckHittable)} is called.");
+
+            DrawableHitObject? blockingObject = null;
 
             foreach (var obj in enumerateHitObjectsUpTo(hitObject.HitObject.StartTime))
             {
@@ -36,22 +38,25 @@ namespace osu.Game.Rulesets.Osu.UI
 
             // If there is no previous hitobject, allow the hit.
             if (blockingObject == null)
-                return true;
+                return ClickAction.Hit;
 
             // A hit is allowed if:
             // 1. The last blocking hitobject has been judged.
             // 2. The current time is after the last hitobject's start time.
             // Hits at exactly the same time as the blocking hitobject are allowed for maps that contain simultaneous hitobjects (e.g. /b/372245).
-            return blockingObject.Judged || time >= blockingObject.HitObject.StartTime;
+            return (blockingObject.Judged || time >= blockingObject.HitObject.StartTime) ? ClickAction.Hit : ClickAction.Shake;
         }
 
         public void HandleHit(DrawableHitObject hitObject)
         {
+            if (HitObjectContainer == null)
+                throw new InvalidOperationException($"{nameof(HitObjectContainer)} should be set before {nameof(HandleHit)} is called.");
+
             // Hitobjects which themselves don't block future hitobjects don't cause misses (e.g. slider ticks, spinners).
             if (!hitObjectCanBlockFutureHits(hitObject))
                 return;
 
-            if (!IsHittable(hitObject, hitObject.HitObject.StartTime + hitObject.Result.TimeOffset))
+            if (CheckHittable(hitObject, hitObject.HitObject.StartTime + hitObject.Result.TimeOffset, hitObject.Result.Type) != ClickAction.Hit)
                 throw new InvalidOperationException($"A {hitObject} was hit before it became hittable!");
 
             // Miss all hitobjects prior to the hit one.
@@ -74,7 +79,7 @@ namespace osu.Game.Rulesets.Osu.UI
 
         private IEnumerable<DrawableHitObject> enumerateHitObjectsUpTo(double targetTime)
         {
-            foreach (var obj in HitObjectContainer.AliveObjects)
+            foreach (var obj in HitObjectContainer!.AliveObjects)
             {
                 if (obj.HitObject.StartTime >= targetTime)
                     yield break;