Merge pull request #23372 from peppy/fix-slider-end-circle-appear-delay

Fix fade in delay for first slider end circle being incorrect when snaking disabled

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

@@ -15,6 +15,10 @@ using osuTK.Graphics;
 using osu.Game.Rulesets.Mods;
 using System.Linq;
 using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Extensions.ObjectExtensions;
+using osu.Framework.Testing;
 using osu.Game.Beatmaps.Legacy;
 using osu.Game.Graphics;
 using osu.Game.Graphics.Sprites;
@@ -22,6 +26,7 @@ using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Osu.Configuration;
 
 namespace osu.Game.Rulesets.Osu.Tests
 {
@@ -30,6 +35,27 @@ namespace osu.Game.Rulesets.Osu.Tests
     {
         private int depthIndex;
 
+        private readonly BindableBool snakingIn = new BindableBool();
+        private readonly BindableBool snakingOut = new BindableBool();
+
+        [SetUpSteps]
+        public void SetUpSteps()
+        {
+            AddToggleStep("toggle snaking", v =>
+            {
+                snakingIn.Value = v;
+                snakingOut.Value = v;
+            });
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            var config = (OsuRulesetConfigManager)RulesetConfigs.GetConfigFor(Ruleset.Value.CreateInstance()).AsNonNull();
+            config.BindWith(OsuRulesetSetting.SnakingInSliders, snakingIn);
+            config.BindWith(OsuRulesetSetting.SnakingOutSliders, snakingOut);
+        }
+
         [Test]
         public void TestVariousSliders()
         {

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

@@ -87,12 +87,15 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
         protected override void UpdateInitialTransforms()
         {
+            // When snaking in is enabled, the first end circle needs to be delayed until the snaking completes.
+            bool delayFadeIn = DrawableSlider.SliderBody?.SnakingIn.Value == true && HitObject.RepeatIndex == 0;
+
             animDuration = Math.Min(300, HitObject.SpanDuration);
 
-            this.Animate(
+            this
-                d => d.FadeIn(animDuration),
+                .FadeOut()
-                d => d.ScaleTo(0.5f).ScaleTo(1f, animDuration * 2, Easing.OutElasticHalf)
+                .Delay(delayFadeIn ? (Slider?.TimePreempt ?? 0) / 3 : 0)
-            );
+                .FadeIn(HitObject.RepeatIndex == 0 ? HitObject.TimeFadeIn : animDuration);
         }
 
         protected override void UpdateHitStateTransforms(ArmedState state)

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

@@ -91,7 +91,13 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
         {
             base.UpdateInitialTransforms();
 
-            CirclePiece.FadeInFromZero(HitObject.TimeFadeIn);
+            // When snaking in is enabled, the first end circle needs to be delayed until the snaking completes.
+            bool delayFadeIn = DrawableSlider.SliderBody?.SnakingIn.Value == true && HitObject.RepeatIndex == 0;
+
+            CirclePiece
+                .FadeOut()
+                .Delay(delayFadeIn ? (Slider?.TimePreempt ?? 0) / 3 : 0)
+                .FadeIn(HitObject.TimeFadeIn);
         }
 
         protected override void UpdateHitStateTransforms(ArmedState state)

osu.Game.Rulesets.Osu/Objects/SliderEndCircle.cs

@@ -39,11 +39,8 @@ namespace osu.Game.Rulesets.Osu.Objects
             }
             else
             {
-                // taken from osu-stable
-                const float first_end_circle_preempt_adjust = 2 / 3f;
-
                 // The first end circle should fade in with the slider.
-                TimePreempt = (StartTime - slider.StartTime) + slider.TimePreempt * first_end_circle_preempt_adjust;
+                TimePreempt += StartTime - slider.StartTime;
             }
         }