From 8295fb908174b78cdf7803a28e5b5be4ae5346e9 Mon Sep 17 00:00:00 2001
From: smoogipoo <smoogipoo@smgi.me>
Date: Wed, 3 Feb 2021 16:28:22 +0900
Subject: [PATCH] Implement mania constant speed mod

---
 osu.Game.Rulesets.Mania/ManiaRuleset.cs       |  1 +
 .../Mods/ManiaModConstantSpeed.cs             | 35 +++++++++++++++++++
 .../UI/DrawableManiaRuleset.cs                |  5 +++
 .../UI/Scrolling/DrawableScrollingRuleset.cs  |  8 ++---
 4 files changed, 45 insertions(+), 4 deletions(-)
 create mode 100644 osu.Game.Rulesets.Mania/Mods/ManiaModConstantSpeed.cs

diff --git a/osu.Game.Rulesets.Mania/ManiaRuleset.cs b/osu.Game.Rulesets.Mania/ManiaRuleset.cs
index 59c766fd84..4c729fef83 100644
--- a/osu.Game.Rulesets.Mania/ManiaRuleset.cs
+++ b/osu.Game.Rulesets.Mania/ManiaRuleset.cs
@@ -238,6 +238,7 @@ namespace osu.Game.Rulesets.Mania
                         new ManiaModMirror(),
                         new ManiaModDifficultyAdjust(),
                         new ManiaModInvert(),
+                        new ManiaModConstantSpeed()
                     };
 
                 case ModType.Automation:
diff --git a/osu.Game.Rulesets.Mania/Mods/ManiaModConstantSpeed.cs b/osu.Game.Rulesets.Mania/Mods/ManiaModConstantSpeed.cs
new file mode 100644
index 0000000000..078394b1d8
--- /dev/null
+++ b/osu.Game.Rulesets.Mania/Mods/ManiaModConstantSpeed.cs
@@ -0,0 +1,35 @@
+// 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.Game.Configuration;
+using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Rulesets.Mania.UI;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.UI;
+
+namespace osu.Game.Rulesets.Mania.Mods
+{
+    public class ManiaModConstantSpeed : Mod, IApplicableToDrawableRuleset<ManiaHitObject>
+    {
+        public override string Name => "Constant Speed";
+
+        public override string Acronym => "CS";
+
+        public override double ScoreMultiplier => 1;
+
+        public override string Description => "No more tricky speed changes!";
+
+        public override IconUsage? Icon => FontAwesome.Solid.Equals;
+
+        public override ModType Type => ModType.Conversion;
+
+        public override bool Ranked => false;
+
+        public void ApplyToDrawableRuleset(DrawableRuleset<ManiaHitObject> drawableRuleset)
+        {
+            var maniaRuleset = (DrawableManiaRuleset)drawableRuleset;
+            maniaRuleset.ScrollMethod = ScrollVisualisationMethod.Constant;
+        }
+    }
+}
diff --git a/osu.Game.Rulesets.Mania/UI/DrawableManiaRuleset.cs b/osu.Game.Rulesets.Mania/UI/DrawableManiaRuleset.cs
index 941ac9816c..6b34dbfa09 100644
--- a/osu.Game.Rulesets.Mania/UI/DrawableManiaRuleset.cs
+++ b/osu.Game.Rulesets.Mania/UI/DrawableManiaRuleset.cs
@@ -11,6 +11,7 @@ using osu.Framework.Graphics;
 using osu.Framework.Input;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Configuration;
 using osu.Game.Input.Handlers;
 using osu.Game.Replays;
 using osu.Game.Rulesets.Mania.Beatmaps;
@@ -49,6 +50,10 @@ namespace osu.Game.Rulesets.Mania.UI
 
         protected new ManiaRulesetConfigManager Config => (ManiaRulesetConfigManager)base.Config;
 
+        public ScrollVisualisationMethod ScrollMethod = ScrollVisualisationMethod.Sequential;
+
+        protected override ScrollVisualisationMethod VisualisationMethod => ScrollMethod;
+
         private readonly Bindable<ManiaScrollingDirection> configDirection = new Bindable<ManiaScrollingDirection>();
         private readonly Bindable<double> configTimeRange = new BindableDouble();
 
diff --git a/osu.Game/Rulesets/UI/Scrolling/DrawableScrollingRuleset.cs b/osu.Game/Rulesets/UI/Scrolling/DrawableScrollingRuleset.cs
index 0955f32790..6ffdad211b 100644
--- a/osu.Game/Rulesets/UI/Scrolling/DrawableScrollingRuleset.cs
+++ b/osu.Game/Rulesets/UI/Scrolling/DrawableScrollingRuleset.cs
@@ -91,7 +91,11 @@ namespace osu.Game.Rulesets.UI.Scrolling
             scrollingInfo = new LocalScrollingInfo();
             scrollingInfo.Direction.BindTo(Direction);
             scrollingInfo.TimeRange.BindTo(TimeRange);
+        }
 
+        [BackgroundDependencyLoader]
+        private void load()
+        {
             switch (VisualisationMethod)
             {
                 case ScrollVisualisationMethod.Sequential:
@@ -106,11 +110,7 @@ namespace osu.Game.Rulesets.UI.Scrolling
                     scrollingInfo.Algorithm = new ConstantScrollAlgorithm();
                     break;
             }
-        }
 
-        [BackgroundDependencyLoader]
-        private void load()
-        {
             double lastObjectTime = Objects.LastOrDefault()?.GetEndTime() ?? double.MaxValue;
             double baseBeatLength = TimingControlPoint.DEFAULT_BEAT_LENGTH;