Add comments.

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

@@ -10,10 +10,24 @@ using osu.Game.Modes.Taiko.Objects;
 
 namespace osu.Game.Modes.Taiko.UI
 {
+    /// <summary>
+    /// A component that is displayed at the hit position in the taiko playfield.
+    /// </summary>
     internal class HitTarget : Container
     {
+        /// <summary>
+        /// Diameter of normal hit object circles.
+        /// </summary>
         private const float normal_diameter = TaikoHitObject.CIRCLE_RADIUS * 2 * TaikoPlayfield.PLAYFIELD_SCALE;
+        
+        /// <summary>
+        /// Diameter of finisher hit object circles.
+        /// </summary>
         private const float finisher_diameter = normal_diameter * 1.5f;
+
+        /// <summary>
+        /// The 1px inner border of the taiko playfield.
+        /// </summary>
         private const float border_offset = 1;
 
         public HitTarget()

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

@@ -15,6 +15,9 @@ using System.Collections.Generic;
 
 namespace osu.Game.Modes.Taiko.UI
 {
+    /// <summary>
+    /// A component of the playfield that captures input and displays input as a drum.
+    /// </summary>
     internal class InputDrum : Container
     {
         public InputDrum()
@@ -25,6 +28,8 @@ namespace osu.Game.Modes.Taiko.UI
             {
                 new TaikoHalfDrum(false)
                 {
+                    Name = "Left Half",
+
                     Anchor = Anchor.Centre,
                     Origin = Anchor.CentreRight,
 
@@ -34,6 +39,8 @@ namespace osu.Game.Modes.Taiko.UI
                 },
                 new TaikoHalfDrum(true)
                 {
+                    Name = "Right Half",
+
                     Anchor = Anchor.Centre,
                     Origin = Anchor.CentreLeft,
 
@@ -46,11 +53,16 @@ namespace osu.Game.Modes.Taiko.UI
             };
         }
 
+        /// <summary>
+        /// A half-drum. Contains one centre and one rim hit.
+        /// </summary>
         private class TaikoHalfDrum : Container
         {
             /// <summary>
-            /// Keys[0] -> Inner key
-            /// Keys[0] -> Outer key
+            /// A list of keys which this half-drum accepts.
+            /// <para>
+            /// [0] => Inner key, [1] => Outer key
+            /// </para>
             /// </summary>
             public List<Key> Keys = new List<Key>();
 

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

@@ -14,8 +14,14 @@ using osu.Game.Graphics;
 
 namespace osu.Game.Modes.Taiko.UI
 {
+    /// <summary>
+    /// Text that is shown as judgement when a hit object is hit or missed.
+    /// </summary>
     public class JudgementText : Container
     {
+        /// <summary>
+        /// The Judgement to display.
+        /// </summary>
         public TaikoJudgementInfo Judgement;
 
         private Container textContainer;

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

@@ -14,8 +14,14 @@ using osu.Game.Modes.Taiko.Objects;
 
 namespace osu.Game.Modes.Taiko.UI
 {
+    /// <summary>
+    /// A ring that explodes to indicate a judgement has occurred.
+    /// </summary>
     internal class RingExplosion : CircularContainer
     {
+        /// <summary>
+        /// The Judgement to display.
+        /// </summary>
         public TaikoJudgementInfo Judgement;
 
         private Box innerFill;