Create "AutoGenerator" base class and interface.

osu.Game.Rulesets.Osu/Mods/OsuMod.cs

@@ -96,7 +96,7 @@ namespace osu.Game.Rulesets.Osu.Mods
 
         protected override Score CreateReplayScore(Beatmap<OsuHitObject> beatmap) => new Score
         {
-            Replay = new OsuAutoReplay(beatmap)
+            Replay = new OsuAutoGenerator(beatmap).Generate()
         };
     }
 

osu.Game.Rulesets.Osu/Replays/OsuAutoGenerator.cs

@@ -7,80 +7,82 @@ using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.Objects.Drawables;
 using System;
-using System.Collections.Generic;
 using System.Diagnostics;
 using osu.Framework.Graphics;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Replays;
-using osu.Game.Users;
 
 namespace osu.Game.Rulesets.Osu.Replays
 {
-    public class OsuAutoReplay : OsuAutoReplayBase
+    public class OsuAutoGenerator : OsuAutoGeneratorBase
     {
-        // Options
+        #region Parameters
 
         /// <summary>
         /// If delayed movements should be used, causing the cursor to stay on each hitobject for as long as possible.
         /// Mainly for Autopilot.
         /// </summary>
-        public readonly bool DelayedMovements; // ModManager.CheckActive(Mods.Relax2);
+        public bool DelayedMovements; // ModManager.CheckActive(Mods.Relax2);
 
+        #endregion
 
-        // Local constants
+        #region Constants
 
         /// <summary>
         /// The "reaction time" in ms between "seeing" a new hit object and moving to "react" to it.
         /// </summary>
-        private double reactionTime;
+        private readonly double reactionTime;
 
         /// <summary>
         /// What easing to use when moving between hitobjects
         /// </summary>
         private EasingTypes preferredEasing => DelayedMovements ? EasingTypes.InOutCubic : EasingTypes.Out;
 
+        #endregion
+
+        #region Construction / Initialisation
+
+        public OsuAutoGenerator(Beatmap<OsuHitObject> beatmap)
+            : base(beatmap)
+        {
+            // Already superhuman, but still somewhat realistic
+            reactionTime = applyModsToRate(100);
+        }
+
+        #endregion
+
+        #region Generator
+
         /// <summary>
         /// Which button (left or right) to use for the current hitobject.
         /// Even means LMB will be used to click, odd means RMB will be used.
         /// This keeps track of the button previously used for alt/singletap logic.
         /// </summary>
-
         private int buttonIndex;
 
-        public OsuAutoReplay(Beatmap<OsuHitObject> beatmap)
+        public override Replay Generate()
-            : base(beatmap)
-        {
-        }
-
-        protected override void Initialise()
-        {
-            base.Initialise();
-
-            // Already superhuman, but still somewhat realistic
-            reactionTime = applyModsToRate(100);
-        }
-
-        protected override void CreateAutoReplay()
         {
             buttonIndex = 0;
 
             addFrameToReplay(new ReplayFrame(-100000, 256, 500, ReplayButtonState.None));
-            addFrameToReplay(new ReplayFrame(beatmap.HitObjects[0].StartTime - 1500, 256, 500, ReplayButtonState.None));
+            addFrameToReplay(new ReplayFrame(Beatmap.HitObjects[0].StartTime - 1500, 256, 500, ReplayButtonState.None));
-            addFrameToReplay(new ReplayFrame(beatmap.HitObjects[0].StartTime - 1000, 256, 192, ReplayButtonState.None));
+            addFrameToReplay(new ReplayFrame(Beatmap.HitObjects[0].StartTime - 1000, 256, 192, ReplayButtonState.None));
 
 
-            for (int i = 0; i < beatmap.HitObjects.Count; i++)
+            for (int i = 0; i < Beatmap.HitObjects.Count; i++)
             {
-                OsuHitObject h = beatmap.HitObjects[i];
+                OsuHitObject h = Beatmap.HitObjects[i];
 
                 if (DelayedMovements && i > 0)
                 {
-                    OsuHitObject prev = beatmap.HitObjects[i - 1];
+                    OsuHitObject prev = Beatmap.HitObjects[i - 1];
                     addDelayedMovements(h, prev);
                 }
 
                 addHitObjectReplay(h);
             }
+
+            return Replay;
         }
 
         private void addDelayedMovements(OsuHitObject h, OsuHitObject prev)
@@ -119,9 +121,9 @@ namespace osu.Game.Rulesets.Osu.Replays
             {
                 calcSpinnerStartPosAndDirection(Frames[Frames.Count - 1].Position, out startPosition, out spinnerDirection);
 
-                Vector2 spinCentreOffset = spinner_centre - Frames[Frames.Count - 1].Position;
+                Vector2 spinCentreOffset = SPINNER_CENTRE - Frames[Frames.Count - 1].Position;
 
-                if (spinCentreOffset.Length > spin_radius)
+                if (spinCentreOffset.Length > SPIN_RADIUS)
                 {
                     // If moving in from the outside, don't ease out (default eases out). This means auto will "start" spinning immediately after moving into position.
                     easing = EasingTypes.In;
@@ -139,19 +141,22 @@ namespace osu.Game.Rulesets.Osu.Replays
             addHitObjectClickFrames(h, startPosition, spinnerDirection);
         }
 
+        #endregion
+
+        #region Helper subroutines
 
         private static void calcSpinnerStartPosAndDirection(Vector2 prevPos, out Vector2 startPosition, out float spinnerDirection)
         {
-            Vector2 spinCentreOffset = spinner_centre - prevPos;
+            Vector2 spinCentreOffset = SPINNER_CENTRE - prevPos;
             float distFromCentre = spinCentreOffset.Length;
-            float distToTangentPoint = (float)Math.Sqrt(distFromCentre * distFromCentre - spin_radius * spin_radius);
+            float distToTangentPoint = (float)Math.Sqrt(distFromCentre * distFromCentre - SPIN_RADIUS * SPIN_RADIUS);
 
-            if (distFromCentre > spin_radius)
+            if (distFromCentre > SPIN_RADIUS)
             {
                 // Previous cursor position was outside spin circle, set startPosition to the tangent point.
 
                 // Angle between centre offset and tangent point offset.
-                float angle = (float)Math.Asin(spin_radius / distFromCentre);
+                float angle = (float)Math.Asin(SPIN_RADIUS / distFromCentre);
 
                 if (angle > 0)
                 {
@@ -176,13 +181,13 @@ namespace osu.Game.Rulesets.Osu.Replays
             else if (spinCentreOffset.Length > 0)
             {
                 // Previous cursor position was inside spin circle, set startPosition to the nearest point on spin circle.
-                startPosition = spinner_centre - spinCentreOffset * (spin_radius / spinCentreOffset.Length);
+                startPosition = SPINNER_CENTRE - spinCentreOffset * (SPIN_RADIUS / spinCentreOffset.Length);
                 spinnerDirection = 1;
             }
             else
             {
                 // Degenerate case where cursor position is exactly at the centre of the spin circle.
-                startPosition = spinner_centre + new Vector2(0, -spin_radius);
+                startPosition = SPINNER_CENTRE + new Vector2(0, -SPIN_RADIUS);
                 spinnerDirection = 1;
             }
         }
@@ -283,7 +288,7 @@ namespace osu.Game.Rulesets.Osu.Replays
             {
                 Spinner s = h as Spinner;
 
-                Vector2 difference = startPosition - spinner_centre;
+                Vector2 difference = startPosition - SPINNER_CENTRE;
 
                 float radius = difference.Length;
                 float angle = radius == 0 ? 0 : (float)Math.Atan2(difference.Y, difference.X);
@@ -294,12 +299,12 @@ namespace osu.Game.Rulesets.Osu.Replays
                 {
                     t = applyModsToTime(j - h.StartTime) * spinnerDirection;
 
-                    Vector2 pos = spinner_centre + circlePosition(t / 20 + angle, spin_radius);
+                    Vector2 pos = SPINNER_CENTRE + circlePosition(t / 20 + angle, SPIN_RADIUS);
                     addFrameToReplay(new ReplayFrame((int)j, pos.X, pos.Y, button));
                 }
 
                 t = applyModsToTime(s.EndTime - h.StartTime) * spinnerDirection;
-                Vector2 endPosition = spinner_centre + circlePosition(t / 20 + angle, spin_radius);
+                Vector2 endPosition = SPINNER_CENTRE + circlePosition(t / 20 + angle, SPIN_RADIUS);
 
                 addFrameToReplay(new ReplayFrame(s.EndTime, endPosition.X, endPosition.Y, button));
 
@@ -323,5 +328,7 @@ namespace osu.Game.Rulesets.Osu.Replays
             if (Frames[Frames.Count - 1].Time <= endFrame.Time)
                 addFrameToReplay(endFrame);
         }
+
+        #endregion
     }
 }

osu.Game.Rulesets.Osu/Replays/OsuAutoGeneratorBase.cs

@@ -2,70 +2,52 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using OpenTK;
-using osu.Framework.MathUtils;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Osu.Objects;
-using osu.Game.Rulesets.Osu.Objects.Drawables;
 using System;
 using System.Collections.Generic;
-using System.Diagnostics;
-using osu.Framework.Graphics;
-using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Replays;
 using osu.Game.Users;
 
 namespace osu.Game.Rulesets.Osu.Replays
 {
-    public abstract class OsuAutoReplayBase : Replay
+    public abstract class OsuAutoGeneratorBase : AutoGenerator<OsuHitObject>
     {
         #region Constants
 
         /// <summary>
         /// Constants (for spinners).
         /// </summary>
-        protected static readonly Vector2 spinner_centre = new Vector2(256, 192);
+        protected static readonly Vector2 SPINNER_CENTRE = new Vector2(256, 192);
-        protected const float spin_radius = 50;
+        protected const float SPIN_RADIUS = 50;
-
-        /// <summary>
-        /// The beatmap we're making a replay out of.
-        /// </summary>
-        protected readonly Beatmap<OsuHitObject> beatmap;
 
         /// <summary>
         /// The time in ms between each ReplayFrame.
         /// </summary>
-        protected double frameDelay;
+        protected readonly double frameDelay;
 
         #endregion
 
-        #region Construction
+        #region Construction / Initialisation
 
-        public OsuAutoReplayBase(Beatmap<OsuHitObject> beatmap)
+        protected Replay Replay;
+        protected List<ReplayFrame> Frames => Replay.Frames;
+
+        protected OsuAutoGeneratorBase(Beatmap<OsuHitObject> beatmap)
+            : base(beatmap)
         {
-            this.beatmap = beatmap;
+            Replay = new Replay
-            Initialise();
-            CreateAutoReplay();
-        }
-
-        /// <summary>
-        /// Initialise this instance. Called before CreateAutoReplay.
-        /// </summary>
-        protected virtual void Initialise()
             {
                 User = new User
                 {
                     Username = @"Autoplay",
+                }
             };
 
             // We are using ApplyModsToRate and not ApplyModsToTime to counteract the speed up / slow down from HalfTime / DoubleTime so that we remain at a constant framerate of 60 fps.
             frameDelay = applyModsToRate(1000.0 / 60.0);
         }
 
-        /// <summary>
-        /// Creates the auto replay. Every OsuAutoReplayBase subclass should implement this!
-        /// </summary>
-        protected abstract void CreateAutoReplay();
-
         #endregion
 
         #region Utilities

osu.Game.Rulesets.Osu/osu.Game.Rulesets.Osu.csproj

@@ -82,8 +82,8 @@
     <Compile Include="Objects\Spinner.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Mods\OsuMod.cs" />
-    <Compile Include="Replays\OsuAutoReplay.cs" />
+    <Compile Include="Replays\OsuAutoGenerator.cs" />
-    <Compile Include="Replays\OsuAutoReplayBase.cs" />
+    <Compile Include="Replays\OsuAutoGeneratorBase.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\osu-framework\osu.Framework\osu.Framework.csproj">

osu.Game.Rulesets.Taiko/Mods/TaikoMod.cs

@@ -72,7 +72,7 @@ namespace osu.Game.Rulesets.Taiko.Mods
         protected override Score CreateReplayScore(Beatmap<TaikoHitObject> beatmap) => new Score
         {
             User = new User { Username = "mekkadosu!" },
-            Replay = new TaikoAutoReplay(beatmap)
+            Replay = new TaikoAutoReplay(beatmap).Generate(),
         };
     }
 }

osu.Game.Rulesets.Taiko/Replays/TaikoAutoReplay.cs

@@ -1,7 +1,8 @@
-// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System;
+using System.Collections.Generic;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Taiko.Objects;
@@ -9,29 +10,28 @@ using osu.Game.Rulesets.Replays;
 
 namespace osu.Game.Rulesets.Taiko.Replays
 {
-    public class TaikoAutoReplay : Replay
+    public class TaikoAutoReplay : AutoGenerator<TaikoHitObject>
     {
         private const double swell_hit_speed = 50;
 
-        private readonly Beatmap<TaikoHitObject> beatmap;
-
         public TaikoAutoReplay(Beatmap<TaikoHitObject> beatmap)
+            : base(beatmap)
         {
-            this.beatmap = beatmap;
-
-            createAutoReplay();
         }
 
-        private void createAutoReplay()
+        protected Replay Replay;
+        protected List<ReplayFrame> Frames => Replay.Frames;
+
+        public override Replay Generate()
         {
             bool hitButton = true;
 
             Frames.Add(new ReplayFrame(-100000, null, null, ReplayButtonState.None));
-            Frames.Add(new ReplayFrame(beatmap.HitObjects[0].StartTime - 1000, null, null, ReplayButtonState.None));
+            Frames.Add(new ReplayFrame(Beatmap.HitObjects[0].StartTime - 1000, null, null, ReplayButtonState.None));
 
-            for (int i = 0; i < beatmap.HitObjects.Count; i++)
+            for (int i = 0; i < Beatmap.HitObjects.Count; i++)
             {
-                TaikoHitObject h = beatmap.HitObjects[i];
+                TaikoHitObject h = Beatmap.HitObjects[i];
 
                 ReplayButtonState button;
 
@@ -105,15 +105,17 @@ namespace osu.Game.Rulesets.Taiko.Replays
 
                 Frames.Add(new ReplayFrame(endTime + KEY_UP_DELAY, null, null, ReplayButtonState.None));
 
-                if (i < beatmap.HitObjects.Count - 1)
+                if (i < Beatmap.HitObjects.Count - 1)
                 {
-                    double waitTime = beatmap.HitObjects[i + 1].StartTime - 1000;
+                    double waitTime = Beatmap.HitObjects[i + 1].StartTime - 1000;
                     if (waitTime > endTime)
                         Frames.Add(new ReplayFrame(waitTime, null, null, ReplayButtonState.None));
                 }
 
                 hitButton = !hitButton;
             }
+
+            return Replay;
         }
     }
 }

osu.Game/Rulesets/Replays/AutoGenerator.cs

@@ -0,0 +1,36 @@
+using osu.Game.Rulesets.Objects;
+using osu.Game.Beatmaps;
+
+namespace osu.Game.Rulesets.Replays
+{
+    public abstract class AutoGenerator<T> : IAutoGenerator
+        where T : HitObject
+    {
+        /// <summary>
+        /// Creates the auto replay and returns it.
+        /// Every subclass of OsuAutoGeneratorBase should implement this!
+        /// </summary>
+        public abstract Replay Generate();
+
+        #region Parameters
+
+        /// <summary>
+        /// The beatmap we're making.
+        /// </summary>
+        protected Beatmap<T> Beatmap;
+
+        #endregion
+
+        public AutoGenerator(Beatmap<T> beatmap)
+        {
+            Beatmap = beatmap;
+        }
+
+        #region Constants
+
+        // Shared amongst all modes
+        protected const double KEY_UP_DELAY = 50;
+
+        #endregion
+    }
+}

osu.Game/Rulesets/Replays/IAutoGenerator.cs

@@ -0,0 +1,9 @@
+using osu.Game.Rulesets.Replays;
+
+namespace osu.Game
+{
+    public interface IAutoGenerator
+    {
+        Replay Generate();
+    }
+}

osu.Game/Rulesets/Replays/Replay.cs

@@ -8,8 +8,6 @@ namespace osu.Game.Rulesets.Replays
 {
     public class Replay
     {
-        protected const double KEY_UP_DELAY = 50;
-
         public User User;
 
         public List<ReplayFrame> Frames = new List<ReplayFrame>();

osu.Game/osu.Game.csproj

@@ -421,6 +421,8 @@
     <Compile Include="Screens\Select\BeatmapDetailArea.cs" />
     <Compile Include="Graphics\UserInterface\OsuTabControlCheckbox.cs" />
     <Compile Include="Screens\Select\BeatmapDetailAreaTabControl.cs" />
+    <Compile Include="Rulesets\Replays\IAutoGenerator.cs" />
+    <Compile Include="Rulesets\Replays\AutoGenerator.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="$(SolutionDir)\osu-framework\osu.Framework\osu.Framework.csproj">