重构并增加HitTest

Spine/Implementations/V34/Attachments/BoundingBoxAttachment34.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Spine.Implementations.V34;
+using Spine.Interfaces;
+using Spine.Interfaces.Attachments;
+using SpineRuntime34;
+
+namespace Spine.Implementations.V34.Attachments
+{
+    internal sealed class BoundingBoxAttachment34(BoundingBoxAttachment innerObject) : 
+        Attachment34(innerObject), 
+        IBoundingBoxAttachment
+    {
+        private readonly BoundingBoxAttachment _o = innerObject;
+
+        public override BoundingBoxAttachment InnerObject => _o;
+
+        public override int ComputeWorldVertices(ISlot slot, ref float[] worldVertices)
+        {
+            if (slot is Slot34 st)
+            {
+                var length = _o.WorldVerticesLength;
+                if (worldVertices.Length < length) worldVertices = new float[length];
+                _o.ComputeWorldVertices(st.InnerObject, worldVertices);
+                return length;
+            }
+            throw new ArgumentException($"Invalid slot type. Expected {nameof(Slot34)}, but received {slot.GetType().Name}", nameof(slot));
+        }
+    }
+}