feat: added engine member tween extensions

Engine.Systems/Tween/EngineExtensions/TweenShape2DExtensions.cs

@@ -0,0 +1,28 @@
+using System.Collections.Generic;
+using Syntriax.Engine.Core;
+
+namespace Syntriax.Engine.Systems.Tween;
+
+public static class TweenShape2DExtensions
+{
+    public static ITween TweenShape2D(this Shape2D shape, ITweenManager tweenManager, float duration, Shape2D targetShape2D)
+    {
+        List<Vector2D> initialVertices = new(shape.Vertices);
+        List<Vector2D> shapeVertices = new(shape.Vertices);
+
+        return tweenManager.StartTween(duration,
+                t =>
+                {
+                    shapeVertices.Clear();
+                    int count = Math.Lerp(initialVertices.Count, targetShape2D.Vertices.Count, t).RoundToInt();
+                    for (int i = 0; i < count; i++)
+                    {
+                        int initialIndex = i.Min(initialVertices.Count);
+                        int targetIndex = i.Min(targetShape2D.Vertices.Count);
+                        shapeVertices.Add(targetShape2D.Vertices[targetIndex].Lerp(initialVertices[initialIndex], 1f - t));
+                    }
+                    shape.Vertices = shapeVertices;
+                }
+            );
+    }
+}