KeyFrameReducer に分ける

Assets/ArtNet/Editor/DmxRecorder/TimelineConverter.cs

@@ -182,40 +182,10 @@ public void ThinOutUnchangedFrames()
             for (var i = 0; i < ChannelDmxFrameData.Length; i++)
             {
                 var dmxFrameData = ChannelDmxFrameData[i];
-                if (dmxFrameData.Count == 0) continue;
-
-                var latest = dmxFrameData[0];
-                var newDmxFrameData = new List<KeyFrameData> { dmxFrameData[0] };
-
-                for (var j = 1; j < dmxFrameData.Count - 1; j++)
-                {
-                    var current = dmxFrameData[j];
-                    var next = dmxFrameData[j + 1];
-                    if (IsOmittedFrame(latest, current, next)) continue;
-
-                    latest = current;
-                    newDmxFrameData.Add(dmxFrameData[j]);
-                }
-
-                newDmxFrameData.Add(dmxFrameData[^1]);
-                ChannelDmxFrameData[i] = newDmxFrameData;
+                ChannelDmxFrameData[i] = KeyFrameReducer.Reduce(dmxFrameData);
             }
         }
 
-        private static bool IsOmittedFrame(
-            KeyFrameData prev,
-            KeyFrameData current,
-            KeyFrameData next,
-            float tolerance = 0.01f)
-        {
-            var prevDiff = current.Value - prev.Value;
-            var nextDiff = next.Value - current.Value;
-            var prevDiffTime = current.Time - prev.Time;
-            var nextDiffTime = next.Time - current.Time;
-
-            return Math.Abs(prevDiff / prevDiffTime - nextDiff / nextDiffTime) <= tolerance;
-        }
-
         public IEnumerable<UniverseData> ToUniverseData()
         {
             var universeData = new List<UniverseData>();

Assets/ArtNet/Editor/KeyFrameReducer.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Collections.Generic;
+
+namespace ArtNet.Editor
+{
+    public static class KeyFrameReducer
+    {
+        public static List<KeyFrameData> Reduce(List<KeyFrameData> keyFrameData)
+        {
+            if (keyFrameData.Count <= 2) return keyFrameData;
+
+            var newDmxFrameData = new List<KeyFrameData> { keyFrameData[0] };
+            var latest = keyFrameData[0];
+
+            for (var i = 1; i < keyFrameData.Count - 1; i++)
+            {
+                var current = keyFrameData[i];
+                var next = keyFrameData[i + 1];
+                if (IsOmittedFrame(latest, current, next)) continue;
+
+                newDmxFrameData.Add(current);
+                latest = current;
+            }
+
+            newDmxFrameData.Add(keyFrameData[^1]);
+            return newDmxFrameData;
+        }
+
+        private static bool IsOmittedFrame(
+            KeyFrameData prev,
+            KeyFrameData current,
+            KeyFrameData next,
+            float tolerance = 0.01f)
+        {
+            var prevDiffValue = current.Value - prev.Value;
+            var prevDiffTime = current.Time - prev.Time;
+            var nextDiffValue = next.Value - current.Value;
+            var nextDiffTime = next.Time - current.Time;
+
+            return Math.Abs(prevDiffValue / prevDiffTime - nextDiffValue / nextDiffTime) <= tolerance;
+        }
+    }
+}