Mode -> Ruleset.

osu.Game.Rulesets.Taiko/Objects/DrumRollTick.cs

@@ -0,0 +1,24 @@
+// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+namespace osu.Game.Rulesets.Taiko.Objects
+{
+    public class DrumRollTick : TaikoHitObject
+    {
+        /// <summary>
+        /// Whether this is the first (initial) tick of the slider.
+        /// </summary>
+        public bool FirstTick;
+
+        /// <summary>
+        /// The length (in milliseconds) between this tick and the next.
+        /// <para>Half of this value is the hit window of the tick.</para>
+        /// </summary>
+        public double TickSpacing;
+
+        /// <summary>
+        /// The time allowed to hit this tick.
+        /// </summary>
+        public double HitWindow => TickSpacing / 2;
+    }
+}