Make taiko playfield scale by height.

osu.Desktop.VisualTests/Tests/TestCaseTaikoPlayfield.cs

@@ -61,17 +61,24 @@ namespace osu.Desktop.VisualTests.Tests
         {
             TaikoHitResult hitResult = RNG.Next(2) == 0 ? TaikoHitResult.Good : TaikoHitResult.Great;
 
-            playfield.OnJudgement(new DrawableTestHit(new Hit())
+            var h = new DrawableTestHit(new Hit())
             {
                 X = RNG.NextSingle(hitResult == TaikoHitResult.Good ? -0.1f : -0.05f, hitResult == TaikoHitResult.Good ? 0.1f : 0.05f),
                 Judgement = new TaikoJudgement
                 {
                     Result = HitResult.Hit,
                     TaikoResult = hitResult,
-                    TimeOffset = 0,
+                    TimeOffset = 0
-                    SecondHit = RNG.Next(10) == 0
+                }
+            };
+
+            playfield.OnJudgement(h);
+
+            if (RNG.Next(10) == 0)
+            {
+                h.Judgement.SecondHit = true;
+                playfield.OnJudgement(h);
             }
-            });
         }
 
         private void addMissJudgement()

osu.Game.Modes.Taiko/Objects/Drawables/DrawableDrumRoll.cs

@@ -49,7 +49,7 @@ namespace osu.Game.Modes.Taiko.Objects.Drawables
         protected override TaikoPiece CreateMainPiece() => new ElongatedCirclePiece(HitObject.IsStrong)
         {
             Length = (float)(HitObject.Duration / HitObject.ScrollTime),
-            PlayfieldLengthReference = () => Parent.DrawSize.X
+            PlayfieldLengthReference = () => Parent.DrawSize.X / DrawScale.X
         };
 
         [BackgroundDependencyLoader]

osu.Game.Modes.Taiko/Objects/Drawables/DrawableTaikoHitObject.cs

@@ -22,7 +22,7 @@ namespace osu.Game.Modes.Taiko.Objects.Drawables
         /// </summary>
         private readonly List<Key> validKeys = new List<Key>(new[] { Key.D, Key.F, Key.J, Key.K });
 
-        public override Vector2 OriginPosition => new Vector2(DrawHeight / 2);
+        public override Vector2 OriginPosition => new Vector2(bodyContainer.DrawHeight / 2f, DrawHeight / 2f);
 
         protected override Container<Drawable> Content => bodyContainer;
 
@@ -46,6 +46,8 @@ namespace osu.Game.Modes.Taiko.Objects.Drawables
 
             AddInternal(bodyContainer = new Container
             {
+                Anchor = Anchor.CentreLeft,
+                Origin = Anchor.CentreLeft,
                 AutoSizeAxes = Axes.Both,
                 Children = new[]
                 {

osu.Game.Modes.Taiko/UI/HitTarget.cs

@@ -37,7 +37,7 @@ namespace osu.Game.Modes.Taiko.UI
 
         public HitTarget()
         {
-            RelativeSizeAxes = Axes.Y;
+            Size = new Vector2(TaikoPlayfield.DEFAULT_PLAYFIELD_HEIGHT);
 
             Children = new Drawable[]
             {
@@ -47,7 +47,7 @@ namespace osu.Game.Modes.Taiko.UI
                     Anchor = Anchor.TopCentre,
                     Origin = Anchor.TopCentre,
                     Y = border_offset,
-                    Size = new Vector2(border_thickness, (TaikoPlayfield.PLAYFIELD_HEIGHT - strong_hit_diameter) / 2f - border_offset),
+                    Size = new Vector2(border_thickness, (TaikoPlayfield.DEFAULT_PLAYFIELD_HEIGHT - strong_hit_diameter) / 2f - border_offset),
                     Alpha = 0.1f
                 },
                 new CircularContainer
@@ -96,7 +96,7 @@ namespace osu.Game.Modes.Taiko.UI
                     Anchor = Anchor.BottomCentre,
                     Origin = Anchor.BottomCentre,
                     Y = -border_offset,
-                    Size = new Vector2(border_thickness, (TaikoPlayfield.PLAYFIELD_HEIGHT - strong_hit_diameter) / 2f - border_offset),
+                    Size = new Vector2(border_thickness, (TaikoPlayfield.DEFAULT_PLAYFIELD_HEIGHT - strong_hit_diameter) / 2f - border_offset),
                     Alpha = 0.1f
                 },
             };

osu.Game.Modes.Taiko/UI/InputDrum.cs

@@ -21,7 +21,7 @@ namespace osu.Game.Modes.Taiko.UI
     {
         public InputDrum()
         {
-            Size = new Vector2(TaikoPlayfield.PLAYFIELD_HEIGHT);
+            Size = new Vector2(TaikoPlayfield.DEFAULT_PLAYFIELD_HEIGHT);
 
             const float middle_split = 10;
 

osu.Game.Modes.Taiko/UI/TaikoPlayfield.cs

@@ -25,7 +25,7 @@ namespace osu.Game.Modes.Taiko.UI
         /// The play field height. This is relative to the size of hit objects
         /// such that the playfield is just a bit larger than strong hits.
         /// </summary>
-        public const float PLAYFIELD_HEIGHT = TaikoHitObject.CIRCLE_RADIUS * 2 * 2;
+        public const float DEFAULT_PLAYFIELD_HEIGHT = TaikoHitObject.CIRCLE_RADIUS * 2 * 2;
 
         /// <summary>
         /// The offset from <see cref="left_area_size"/> which the center of the hit target lies at.
@@ -53,7 +53,7 @@ namespace osu.Game.Modes.Taiko.UI
         public TaikoPlayfield()
         {
             RelativeSizeAxes = Axes.X;
-            Height = PLAYFIELD_HEIGHT;
+            Height = DEFAULT_PLAYFIELD_HEIGHT;
 
             AddInternal(new Drawable[]
             {
@@ -93,7 +93,8 @@ namespace osu.Game.Modes.Taiko.UI
                                 {
                                     Anchor = Anchor.CentreLeft,
                                     Origin = Anchor.Centre,
-                                    Size = new Vector2(TaikoHitObject.CIRCLE_RADIUS * 2),
+                                    Size = new Vector2(DEFAULT_PLAYFIELD_HEIGHT),
+                                    FillMode = FillMode.Fit,
                                     BlendingMode = BlendingMode.Additive
                                 },
                                 barLineContainer = new Container<DrawableBarLine>
@@ -104,6 +105,7 @@ namespace osu.Game.Modes.Taiko.UI
                                 {
                                     Anchor = Anchor.CentreLeft,
                                     Origin = Anchor.Centre,
+                                    FillMode = FillMode.Fit
                                 },
                                 hitObjectContainer = new Container
                                 {
@@ -111,7 +113,8 @@ namespace osu.Game.Modes.Taiko.UI
                                 },
                                 judgementContainer = new Container<DrawableTaikoJudgement>
                                 {
-                                    RelativeSizeAxes = Axes.Both,
+                                    Size = new Vector2(DEFAULT_PLAYFIELD_HEIGHT),
+                                    FillMode = FillMode.Fit,
                                     BlendingMode = BlendingMode.Additive
                                 },
                             },
@@ -120,7 +123,8 @@ namespace osu.Game.Modes.Taiko.UI
                 },
                 leftBackgroundContainer = new Container
                 {
-                    Size = new Vector2(left_area_size, PLAYFIELD_HEIGHT),
+                    RelativeSizeAxes = Axes.Y,
+                    Width = left_area_size,
                     BorderThickness = 1,
                     Children = new Drawable[]
                     {
@@ -134,6 +138,7 @@ namespace osu.Game.Modes.Taiko.UI
                             Origin = Anchor.Centre,
                             RelativePositionAxes = Axes.X,
                             Position = new Vector2(0.10f, 0),
+                            FillMode = FillMode.Fit,
                             Scale = new Vector2(0.9f)
                         },
                         new Box
@@ -164,6 +169,9 @@ namespace osu.Game.Modes.Taiko.UI
 
         public override void Add(DrawableHitObject<TaikoHitObject, TaikoJudgement> h)
         {
+            h.AutoSizeAxes = h.AutoSizeAxes & ~Axes.Y;
+            h.Height = DEFAULT_PLAYFIELD_HEIGHT;
+            h.FillMode = FillMode.Fit;
             h.Depth = (float)h.HitObject.StartTime;
 
             base.Add(h);