feat: added sphere primitive

Engine.Systems/Tween/EngineExtensions/TweenSphere3DExtensions.cs

@@ -0,0 +1,31 @@
+using Engine.Core;
+
+namespace Engine.Systems.Tween;
+
+public static class TweenSphere3DExtensions
+{
+    private static readonly BoxedPool<Sphere3D> boxedSphere3DPool = new(2);
+
+    public static ITween TweenSphere3D(this Sphere3D initialSphere3D, ITweenManager tweenManager, float duration, Sphere3D targetSphere3D, System.Action<Sphere3D> setMethod)
+    {
+        Boxed<Sphere3D> boxedInitial = boxedSphere3DPool.Get(initialSphere3D);
+        Boxed<Sphere3D> boxedTarget = boxedSphere3DPool.Get(targetSphere3D);
+
+        ITween tween = tweenManager.StartTween(duration,
+            t => setMethod?.Invoke(
+                new Sphere3D(
+                    boxedInitial.Value.Center.Lerp(boxedTarget.Value.Center, t),
+                    boxedInitial.Value.Diameter.Lerp(boxedTarget.Value.Diameter, t)
+                )
+            )
+        );
+
+        tween.OnComplete(() =>
+        {
+            boxedSphere3DPool.Return(boxedInitial);
+            boxedSphere3DPool.Return(boxedTarget);
+        });
+
+        return tween;
+    }
+}