Add support for Rect tweens

Author: adamgraham

Runtime/Interpolation.cs

@@ -99,6 +99,16 @@ public static Quaternion Lerp(Quaternion a, Quaternion b, float t, bool snapping
             return snapping ? Snap(value) : value;
         }
 
+        /// <summary>
+        /// Linearly interpolates between a and b by t.
+        /// </summary>
+        public static Rect Lerp(Rect a, Rect b, float t, bool snapping = false)
+        {
+            Vector2 position = Lerp(a.position, b.position, t, snapping);
+            Vector2 size = Lerp(a.size, b.size, t, snapping);
+            return new Rect(position, size);
+        }
+
         /// <summary>
         /// Linearly interpolates between a and b by t.
         /// </summary>

Runtime/Tweening.cs

@@ -159,6 +159,13 @@ public static Tween To(TweenGetter<Vector4> getter, TweenSetter<Vector4> setter,
         public static Tween To(TweenGetter<Quaternion> getter, TweenSetter<Quaternion> setter, Quaternion endValue, float duration) =>
             To(Interpolation.Lerp, getter, setter, endValue, duration);
 
+        /// <summary>
+        /// Creates a tween that animates a parameter to a given end value over
+        /// a set duration.
+        /// </summary>
+        public static Tween To(TweenGetter<Rect> getter, TweenSetter<Rect> setter, Rect endValue, float duration) =>
+            To(Interpolation.Lerp, getter, setter, endValue, duration);
+
         /// <summary>
         /// Creates a tween that animates a parameter to a given end value over
         /// a set duration.
@@ -252,6 +259,13 @@ public static Tween From(TweenGetter<Vector4> getter, TweenSetter<Vector4> sette
         public static Tween From(TweenGetter<Quaternion> getter, TweenSetter<Quaternion> setter, Quaternion endValue, float duration) =>
             From(Interpolation.Lerp, getter, setter, endValue, duration);
 
+        /// <summary>
+        /// Creates a tween that animates a parameter from a given end value to
+        /// the current value over a set duration.
+        /// </summary>
+        public static Tween From(TweenGetter<Rect> getter, TweenSetter<Rect> setter, Rect endValue, float duration) =>
+            From(Interpolation.Lerp, getter, setter, endValue, duration);
+
         /// <summary>
         /// Creates a tween that animates a parameter from a given end value to
         /// the current value over a set duration.