Move spm calculation into counter.

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableSpinner.cs

@@ -1,7 +1,6 @@
 // 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.Linq;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
@@ -14,7 +13,6 @@
 using osu.Framework.Allocation;
 using osu.Game.Rulesets.Osu.Judgements;
 using osu.Game.Screens.Ranking;
-using osu.Game.Graphics.Sprites;
 
 namespace osu.Game.Rulesets.Osu.Objects.Drawables
 {
@@ -184,7 +182,7 @@ protected override void UpdateAfterChildren()
 
             circle.Rotation = disc.Rotation;
             ticks.Rotation = disc.Rotation;
-            spmText.Text = Math.Truncate(disc.SpinsPerMinute).ToString(@"#0");
+            spmCounter.SetRotation(disc.RotationAbsolute);
 
             float relativeCircleScale = spinner.Scale * circle.DrawHeight / mainContainer.DrawHeight;
             disc.ScaleTo(relativeCircleScale + (1 - relativeCircleScale) * Progress, 200, Easing.OutQuint);

osu.Game.Rulesets.Osu/Objects/Drawables/Pieces/SpinnerDisc.cs

@@ -2,7 +2,6 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System;
-using System.Collections.Generic;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Input;
@@ -78,17 +77,6 @@ protected override bool OnMouseMove(InputState state)
         private float lastAngle;
         private float currentRotation;
         public float RotationAbsolute;
-        public double SpinsPerMinute;
-
-        private struct RotationRecord
-        {
-            public float Rotation;
-            public double Time;
-        }
-
-        private readonly Queue<RotationRecord> records = new Queue<RotationRecord>();
-        private const double spm_count_duration = 595; // not using hundreds to avoid frame rounding issues
-
         private int completeTick;
 
         private bool updateCompleteTick() => completeTick != (completeTick = (int)(RotationAbsolute / 360));
@@ -121,14 +109,6 @@ protected override void Update()
             }
 
             lastAngle = thisAngle;
-            if (records.Count > 0)
-            {
-                var record = records.Peek();
-                while (Time.Current - records.Peek().Time > spm_count_duration)
-                    record = records.Dequeue();
-                SpinsPerMinute = (RotationAbsolute - record.Rotation) / (Time.Current - record.Time) * 1000 * 60 / 360;
-            }
-            records.Enqueue(new RotationRecord { Rotation = RotationAbsolute, Time = Time.Current });
 
             if (Complete && updateCompleteTick())
             {

osu.Game.Rulesets.Osu/Objects/Drawables/Pieces/SpinnerSpmCounter.cs

@@ -3,9 +3,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Game.Graphics.Sprites;
@@ -38,5 +35,39 @@ public SpinnerSpmCounter()
                 }
             };
         }
+
+        private double spm;
+        public double SpinsPerMinute
+        {
+            get { return spm; }
+            private set
+            {
+                if (value == spm) return;
+                spm = value;
+                spmText.Text = Math.Truncate(value).ToString(@"#0");
+            }
+        }
+
+        private struct RotationRecord
+        {
+            public float Rotation;
+            public double Time;
+        }
+
+        private readonly Queue<RotationRecord> records = new Queue<RotationRecord>();
+        private const double spm_count_duration = 595; // not using hundreds to avoid frame rounding issues
+
+
+        public void SetRotation(float currentRotation)
+        {
+            if (records.Count > 0)
+            {
+                var record = records.Peek();
+                while (Time.Current - records.Peek().Time > spm_count_duration)
+                    record = records.Dequeue();
+                SpinsPerMinute = (currentRotation - record.Rotation) / (Time.Current - record.Time) * 1000 * 60 / 360;
+            }
+            records.Enqueue(new RotationRecord { Rotation = currentRotation, Time = Time.Current });
+        }
     }
 }