Fix swell ticks having non-zero time offsets

osu.Game.Rulesets.Taiko.Tests/TestSceneSwellJudgements.cs

@@ -0,0 +1,74 @@
+// 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.Collections.Generic;
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Judgements;
+using osu.Game.Rulesets.Scoring;
+using osu.Game.Rulesets.Taiko.Judgements;
+using osu.Game.Rulesets.Taiko.Objects;
+using osu.Game.Screens.Play;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Rulesets.Taiko.Tests
+{
+    public class TestSceneSwellJudgements : PlayerTestScene
+    {
+        protected new TestPlayer Player => (TestPlayer)base.Player;
+
+        public TestSceneSwellJudgements()
+            : base(new TaikoRuleset())
+        {
+        }
+
+        [Test]
+        public void TestZeroTickTimeOffsets()
+        {
+            AddUntilStep("gameplay finished", () => Player.ScoreProcessor.HasCompleted);
+            AddAssert("all tick offsets are 0", () => Player.Results.Where(r => r.Judgement is TaikoSwellTickJudgement).All(r => r.TimeOffset == 0));
+        }
+
+        protected override bool Autoplay => true;
+
+        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset)
+        {
+            var beatmap = new Beatmap<TaikoHitObject>
+            {
+                BeatmapInfo = { Ruleset = new TaikoRuleset().RulesetInfo },
+                HitObjects =
+                {
+                    new Swell
+                    {
+                        StartTime = 1000,
+                        Duration = 1000,
+                    }
+                }
+            };
+
+            return beatmap;
+        }
+
+        protected override Player CreatePlayer(Ruleset ruleset) => new TestPlayer();
+
+        protected class TestPlayer : Player
+        {
+            public readonly List<JudgementResult> Results = new List<JudgementResult>();
+
+            public new ScoreProcessor ScoreProcessor => base.ScoreProcessor;
+
+            public TestPlayer()
+                : base(false, false)
+            {
+            }
+
+            [BackgroundDependencyLoader]
+            private void load()
+            {
+                ScoreProcessor.NewJudgement += r => Results.Add(r);
+            }
+        }
+    }
+}

osu.Game.Rulesets.Taiko/Objects/Drawables/DrawableSwellTick.cs

@@ -14,7 +14,11 @@ namespace osu.Game.Rulesets.Taiko.Objects.Drawables
         {
         }
 
-        public void TriggerResult(HitResult type) => ApplyResult(r => r.Type = type);
+        public void TriggerResult(HitResult type)
+        {
+            HitObject.StartTime = Time.Current;
+            ApplyResult(r => r.Type = type);
+        }
 
         protected override void CheckForResult(bool userTriggered, double timeOffset)
         {