Add barline drawables.

osu.Desktop.VisualTests/Tests/TestCaseTaikoPlayfield.cs

@@ -6,6 +6,7 @@ using osu.Framework.Screens.Testing;
 using osu.Game.Modes.Objects.Drawables;
 using osu.Game.Modes.Taiko.Judgements;
 using osu.Game.Modes.Taiko.Objects;
+using osu.Game.Modes.Taiko.Objects.Drawable;
 using osu.Game.Modes.Taiko.UI;
 
 namespace osu.Desktop.VisualTests.Tests

osu.Game.Modes.Taiko/Objects/Drawable/DrawableBarLine.cs

@@ -0,0 +1,73 @@
+// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Sprites;
+using osu.Game.Modes.Taiko.UI;
+using OpenTK;
+
+namespace osu.Game.Modes.Taiko.Objects.Drawable
+{
+    /// <summary>
+    /// A line that scrolls alongside hit objects in the playfield and visualises control points.
+    /// </summary>
+    public class DrawableBarLine : Container
+    {
+        /// <summary>
+        /// The line.
+        /// </summary>
+        protected Box Tracker;
+
+        /// <summary>
+        /// The 
+        /// </summary>
+        protected readonly BarLine BarLine;
+
+        public DrawableBarLine(BarLine barLine)
+        {
+            BarLine = barLine;
+
+            Anchor = Anchor.CentreLeft;
+            Origin = Anchor.Centre;
+
+            RelativePositionAxes = Axes.X;
+            RelativeSizeAxes = Axes.Y;
+
+            Width = 2f;
+
+            Children = new[]
+            {
+                Tracker = new Box
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+
+                    RelativeSizeAxes = Axes.Both,
+
+                    EdgeSmoothness = new Vector2(0.5f, 0),
+                    Alpha = 0.75f
+                }
+            };
+
+            LifetimeStart = BarLine.StartTime - BarLine.PreEmpt * 2;
+            LifetimeEnd = BarLine.StartTime + BarLine.PreEmpt;
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            Delay(BarLine.StartTime);
+            FadeOut(100 * BarLine.PreEmpt / 1000);
+        }
+
+        private void moveToTimeOffset(double time) => MoveToX((float)((BarLine.StartTime - time) / BarLine.PreEmpt));
+
+        protected override void Update()
+        {
+            base.Update();
+            moveToTimeOffset(Time.Current);
+        }
+    }
+}

osu.Game.Modes.Taiko/Objects/Drawable/DrawableMajorBarLine.cs

@@ -0,0 +1,55 @@
+// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Sprites;
+using OpenTK;
+
+namespace osu.Game.Modes.Taiko.Objects.Drawable
+{
+    public class DrawableMajorBarLine : DrawableBarLine
+    {
+        public DrawableMajorBarLine(BarLine barLine)
+            : base(barLine)
+        {
+            Add(new Container
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+
+                RelativeSizeAxes = Axes.Both,
+
+                Children = new[]
+                {
+                    new EquilateralTriangle
+                    {
+                        Name = "Top",
+
+                        Anchor = Anchor.TopCentre,
+                        Origin = Anchor.TopCentre,
+
+                        Position = new Vector2(0, -10),
+                        Size = new Vector2(-20),
+
+                        EdgeSmoothness = new Vector2(1),
+                    },
+                    new EquilateralTriangle
+                    {
+                        Name = "Bottom",
+
+                        Anchor = Anchor.BottomCentre,
+                        Origin = Anchor.TopCentre,
+
+                        Position = new Vector2(0, 10),
+                        Size = new Vector2(20),
+
+                        EdgeSmoothness = new Vector2(1),
+                    }
+                }
+            });
+
+            Tracker.Alpha = 1f;
+        }
+    }
+}

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

@@ -14,6 +14,7 @@ using osu.Game.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics.Primitives;
+using osu.Game.Modes.Taiko.Objects.Drawable;
 
 namespace osu.Game.Modes.Taiko.UI
 {
@@ -47,7 +48,7 @@ namespace osu.Game.Modes.Taiko.UI
         protected override Container<Drawable> Content => hitObjectContainer;
 
         private Container<RingExplosion> ringExplosionContainer;
-        //private Container<DrawableBarLine> barLineContainer;
+        private Container<DrawableBarLine> barLineContainer;
         private Container<JudgementText> judgementContainer;
 
         private Container hitObjectContainer;
@@ -105,10 +106,10 @@ namespace osu.Game.Modes.Taiko.UI
                                     Scale = new Vector2(PLAYFIELD_SCALE),
                                     BlendingMode = BlendingMode.Additive
                                 },
-                                //barLineContainer = new Container<DrawableBarLine>
+                                barLineContainer = new Container<DrawableBarLine>
-                                //{
+                                {
-                                //    RelativeSizeAxes = Axes.Both,
+                                    RelativeSizeAxes = Axes.Both,
-                                //},
+                                },
                                 new HitTarget
                                 {
                                     Anchor = Anchor.CentreLeft,

osu.Game.Modes.Taiko/osu.Game.Modes.Taiko.csproj

@@ -52,6 +52,8 @@
     <Compile Include="Judgements\TaikoJudgementInfo.cs" />
     <Compile Include="Judgements\TaikoScoreResult.cs" />
     <Compile Include="Objects\BarLine.cs" />
+    <Compile Include="Objects\Drawable\DrawableBarLine.cs" />
+    <Compile Include="Objects\Drawable\DrawableMajorBarLine.cs" />
     <Compile Include="TaikoDifficultyCalculator.cs" />
     <Compile Include="Objects\Drawable\DrawableTaikoHit.cs" />
     <Compile Include="Objects\TaikoHitObject.cs" />