Fix clashing namespace.

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

@@ -0,0 +1,81 @@
+// 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.Drawables
+{
+    /// <summary>
+    /// A line that scrolls alongside hit objects in the playfield and visualises control points.
+    /// </summary>
+    public class DrawableBarLine : Container
+    {
+        /// <summary>
+        /// The width of the line tracker.
+        /// </summary>
+        private const float tracker_width = 2f;
+
+        /// <summary>
+        /// Fade out time calibrated to a pre-empt of 1000ms.
+        /// </summary>
+        private const float base_fadeout_time = 100f;
+
+        /// <summary>
+        /// The visual line tracker.
+        /// </summary>
+        protected Box Tracker;
+
+        /// <summary>
+        /// The bar line.
+        /// </summary>
+        protected readonly BarLine BarLine;
+
+        public DrawableBarLine(BarLine barLine)
+        {
+            BarLine = barLine;
+
+            Anchor = Anchor.CentreLeft;
+            Origin = Anchor.Centre;
+
+            RelativePositionAxes = Axes.X;
+            RelativeSizeAxes = Axes.Y;
+
+            Width = tracker_width;
+
+            Children = new[]
+            {
+                Tracker = new Box
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    RelativeSizeAxes = Axes.Both,
+                    EdgeSmoothness = new Vector2(0.5f, 0),
+                    Alpha = 0.75f
+                }
+            };
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            LifetimeStart = BarLine.StartTime - BarLine.PreEmpt * 2;
+            LifetimeEnd = BarLine.StartTime + BarLine.PreEmpt;
+
+            Delay(BarLine.StartTime - Time.Current);
+            FadeOut(base_fadeout_time * BarLine.PreEmpt / 1000);
+        }
+
+        private void updateScrollPosition(double time) => MoveToX((float)((BarLine.StartTime - time) / BarLine.PreEmpt));
+
+        protected override void Update()
+        {
+            base.Update();
+
+            updateScrollPosition(Time.Current);
+        }
+    }
+}