perf: memory allocation improvements on ITween.Loop method

Engine.Systems/Tween/TweenExtensions.cs

@@ -4,23 +4,35 @@ namespace Engine.Systems.Tween;
 
 public static class TweenExtensions
 {
+    private static readonly System.Collections.Generic.Dictionary<ITween, int> loopDictionary = [];
+
     public static ITween Loop(this ITween tween, int count)
     {
-        Tween tweenConcrete = (Tween)tween;
+        if (!loopDictionary.TryAdd(tween, count))
-        int counter = count;
+            throw new($"Tween already has a loop in progress.");
 
-        tweenConcrete.OnCompleted.AddListener(_ =>
+        tween.OnCompleted.AddListener(looperDelegate);
-        {
+        tween.OnEnded.AddListener(looperEndDelegate);
-            if (counter-- <= 0)
-                return;
-
-            tweenConcrete.Reset();
-            tweenConcrete.State = TweenState.Playing;
-        });
 
         return tween;
     }
 
+    private static readonly Core.Event<ITween>.EventHandler looperEndDelegate = sender => loopDictionary.Remove(sender);
+    private static readonly Core.Event<ITween>.EventHandler looperDelegate = sender =>
+    {
+        int counter = loopDictionary[sender] = loopDictionary[sender] - 1;
+
+        if (counter <= 0)
+        {
+            loopDictionary.Remove(sender);
+            return;
+        }
+
+        Tween tweenConcrete = (Tween)sender;
+        tweenConcrete.Reset();
+        tweenConcrete.State = TweenState.Playing;
+    };
+
     public static ITween LoopInfinitely(this ITween tween)
     {
         tween.OnCompleted.AddListener(repeaterDelegate);