From 9327bc169b9449828373786f2a00afbc069a2c31 Mon Sep 17 00:00:00 2001
From: smoogipoo <smoogipoo@smgi.me>
Date: Mon, 2 Aug 2021 19:39:30 +0900
Subject: [PATCH] Make TaikoModClassic use classic-like scroll speed

---
 .../Mods/TaikoModClassic.cs                   | 22 ++++++++++++++++++-
 .../UI/DrawableTaikoRuleset.cs                |  5 ++++-
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/osu.Game.Rulesets.Taiko/Mods/TaikoModClassic.cs b/osu.Game.Rulesets.Taiko/Mods/TaikoModClassic.cs
index 5a4d18be98..6520517039 100644
--- a/osu.Game.Rulesets.Taiko/Mods/TaikoModClassic.cs
+++ b/osu.Game.Rulesets.Taiko/Mods/TaikoModClassic.cs
@@ -2,10 +2,30 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Taiko.Objects;
+using osu.Game.Rulesets.Taiko.UI;
+using osu.Game.Rulesets.UI;
 
 namespace osu.Game.Rulesets.Taiko.Mods
 {
-    public class TaikoModClassic : ModClassic
+    public class TaikoModClassic : ModClassic, IApplicableToDrawableRuleset<TaikoHitObject>, IUpdatableByPlayfield
     {
+        private DrawableTaikoRuleset drawableTaikoRuleset;
+
+        public void ApplyToDrawableRuleset(DrawableRuleset<TaikoHitObject> drawableRuleset)
+        {
+            drawableTaikoRuleset = (DrawableTaikoRuleset)drawableRuleset;
+        }
+
+        public void Update(Playfield playfield)
+        {
+            // Classic taiko scrolls at a constant 100px per 1000ms. More notes become visible as the playfield is lengthened.
+            const float scroll_rate = 10;
+
+            // Since the time range will depend on a positional value, it is referenced to the x480 pixel space.
+            float ratio = drawableTaikoRuleset.DrawHeight / 480;
+
+            drawableTaikoRuleset.TimeRange.Value = (playfield.HitObjectContainer.DrawWidth / ratio) * scroll_rate;
+        }
     }
 }
diff --git a/osu.Game.Rulesets.Taiko/UI/DrawableTaikoRuleset.cs b/osu.Game.Rulesets.Taiko/UI/DrawableTaikoRuleset.cs
index ed8e6859a2..650ce1f5a3 100644
--- a/osu.Game.Rulesets.Taiko/UI/DrawableTaikoRuleset.cs
+++ b/osu.Game.Rulesets.Taiko/UI/DrawableTaikoRuleset.cs
@@ -3,6 +3,7 @@
 
 using System.Collections.Generic;
 using osu.Framework.Allocation;
+using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Objects.Drawables;
@@ -24,12 +25,14 @@ namespace osu.Game.Rulesets.Taiko.UI
 {
     public class DrawableTaikoRuleset : DrawableScrollingRuleset<TaikoHitObject>
     {
-        private SkinnableDrawable scroller;
+        public new BindableDouble TimeRange => base.TimeRange;
 
         protected override ScrollVisualisationMethod VisualisationMethod => ScrollVisualisationMethod.Overlapping;
 
         protected override bool UserScrollSpeedAdjustment => false;
 
+        private SkinnableDrawable scroller;
+
         public DrawableTaikoRuleset(Ruleset ruleset, IBeatmap beatmap, IReadOnlyList<Mod> mods = null)
             : base(ruleset, beatmap, mods)
         {