Added speed property to tween layer.

Author: DavidF-Dev

Runtime/Tween.cs

@@ -279,7 +279,7 @@ private Tween()
         ///     Whether the tween animation is able to update. Affected by pausing and time scale.
         /// </summary>
         [PublicAPI]
-        public bool IsAbleToUpdate => !IsPaused && !Layer.IsPaused && (IsUnscaled || Time.timeScale > 0f);
+        public bool IsAbleToUpdate => !IsPaused && !Layer.IsPaused && Layer.Speed > 0f && (IsUnscaled || Time.timeScale > 0f);
 
         /// <summary>
         ///     Whether the tween animation should use Time.unscaledDeltaTime.
@@ -470,7 +470,7 @@ private IEnumerator Update()
                 yield return null;
 
                 // Increment elapsed time
-                ElapsedTime += IsUnscaled ? Mathf.Clamp(Time.unscaledDeltaTime, 0f, 0.2f) : Time.deltaTime;
+                ElapsedTime += (IsUnscaled ? Mathf.Clamp(Time.unscaledDeltaTime, 0f, 0.2f) : Time.deltaTime) * Layer.Speed;
             }
 
             // Snap to the end value

Runtime/TweenLayer.cs

@@ -23,6 +23,8 @@ public sealed class TweenLayer : IReadOnlyList<Tween>
         [NotNull]
         private readonly HashSet<Tween> _tweens = new HashSet<Tween>();
 
+        private float _speed = 1f;
+
         #endregion
 
         #region Properties
@@ -32,6 +34,16 @@ public sealed class TweenLayer : IReadOnlyList<Tween>
         /// </summary>
         [PublicAPI]
         public bool IsPaused { get; set; }
+
+        /// <summary>
+        ///     Playback speed (time factor) of all tween animations on this layer.
+        /// </summary>
+        [PublicAPI]
+        public float Speed
+        {
+            get => _speed;
+            set => _speed = Mathf.Max(0f, value);
+        }
 
         [PublicAPI]
         public int Count => _tweens.Count;