Merge pull request #27341 from Hiviexd/taiko-constant-speed-mod

Add osu!taiko `Constant Speed` mod

osu.Game.Rulesets.Taiko/Edit/DrawableTaikoEditorRuleset.cs

@@ -26,12 +26,5 @@ protected override void LoadComplete()
 
             ShowSpeedChanges.BindValueChanged(showChanges => VisualisationMethod = showChanges.NewValue ? ScrollVisualisationMethod.Overlapping : ScrollVisualisationMethod.Constant, true);
         }
-
-        protected override double ComputeTimeRange()
-        {
-            // Adjust when we're using constant algorithm to not be sluggish.
-            double multiplier = ShowSpeedChanges.Value ? 1 : 4;
-            return base.ComputeTimeRange() / multiplier;
-        }
     }
 }

osu.Game.Rulesets.Taiko/Mods/TaikoModConstantSpeed.cs

@@ -0,0 +1,29 @@
+// 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.Framework.Graphics.Sprites;
+using osu.Framework.Localisation;
+using osu.Game.Configuration;
+using osu.Game.Rulesets.Taiko.Objects;
+using osu.Game.Rulesets.Taiko.UI;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.UI;
+
+namespace osu.Game.Rulesets.Taiko.Mods
+{
+    public class TaikoModConstantSpeed : Mod, IApplicableToDrawableRuleset<TaikoHitObject>
+    {
+        public override string Name => "Constant Speed";
+        public override string Acronym => "CS";
+        public override double ScoreMultiplier => 0.9;
+        public override LocalisableString Description => "No more tricky speed changes!";
+        public override IconUsage? Icon => FontAwesome.Solid.Equals;
+        public override ModType Type => ModType.Conversion;
+
+        public void ApplyToDrawableRuleset(DrawableRuleset<TaikoHitObject> drawableRuleset)
+        {
+            var taikoRuleset = (DrawableTaikoRuleset)drawableRuleset;
+            taikoRuleset.VisualisationMethod = ScrollVisualisationMethod.Constant;
+        }
+    }
+}

osu.Game.Rulesets.Taiko/TaikoRuleset.cs

@@ -150,6 +150,7 @@ public override IEnumerable<Mod> GetModsFor(ModType type)
                         new TaikoModClassic(),
                         new TaikoModSwap(),
                         new TaikoModSingleTap(),
+                        new TaikoModConstantSpeed(),
                     };
 
                 case ModType.Automation:

osu.Game.Rulesets.Taiko/UI/DrawableTaikoRuleset.cs

@@ -82,7 +82,12 @@ protected override void Update()
             TimeRange.Value = ComputeTimeRange();
         }
 
-        protected virtual double ComputeTimeRange() => PlayfieldAdjustmentContainer.ComputeTimeRange();
+        protected virtual double ComputeTimeRange()
+        {
+            // Adjust when we're using constant algorithm to not be sluggish.
+            double multiplier = VisualisationMethod == ScrollVisualisationMethod.Constant ? 4 * Beatmap.Difficulty.SliderMultiplier : 1;
+            return PlayfieldAdjustmentContainer.ComputeTimeRange() / multiplier;
+        }
 
         protected override void UpdateAfterChildren()
         {