重构GeometryCacheManager以使用ModelItemAnalysisHelper获取ModelItem完整路径，移除冗余代码

src/Utils/GeometryCacheManager.cs

@@ -5,6 +5,7 @@ using System.Linq;
 using Autodesk.Navisworks.Api;
 using ComApi = Autodesk.Navisworks.Api.Interop.ComApi;
 using ComApiBridge = Autodesk.Navisworks.Api.ComApi.ComApiBridge;
+using NavisworksTransport.Utils;
 
 namespace NavisworksTransport.Utils
 {
@@ -192,8 +193,8 @@ namespace NavisworksTransport.Utils
             
             var result = new List<Triangle3D>();
             
-            // 获取ModelItem的所有路径
+            // 获取ModelItem的完整路径
-            var itemPaths = GetModelItemPaths(modelItem);
+            var itemPaths = ModelItemAnalysisHelper.GetModelItemIndexPaths(modelItem);
             
             // 收集所有路径下的片段
             foreach (var pathKey in itemPaths)
@@ -263,31 +264,6 @@ namespace NavisworksTransport.Utils
             return count;
         }
         
-        /// <summary>
-        /// 获取ModelItem的所有路径
-        /// </summary>
-        /// <param name="modelItem">模型项</param>
-        /// <returns>路径列表</returns>
-        private List<string> GetModelItemPaths(ModelItem modelItem)
-        {
-            var paths = new List<string>();
-            
-            // 转换为COM选择
-            var modelCollection = new ModelItemCollection();
-            modelCollection.Add(modelItem);
-            var comSelection = ComApiBridge.ToInwOpSelection(modelCollection);
-            
-            // 遍历所有路径
-            foreach (ComApi.InwOaPath3 path in comSelection.Paths())
-            {
-                var pathArray = ((Array)path.ArrayData).ToArray<int>();
-                var pathKey = string.Join(",", pathArray);
-                paths.Add(pathKey);
-            }
-            
-            return paths;
-        }
-        
         /// <summary>
         /// 获取指定路径下的所有片段
         /// </summary>

src/Utils/ModelItemAnalysisHelper.cs

@@ -2,6 +2,8 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using Autodesk.Navisworks.Api;
+using ComApi = Autodesk.Navisworks.Api.Interop.ComApi;
+using ComApiBridge = Autodesk.Navisworks.Api.ComApi.ComApiBridge;
 
 namespace NavisworksTransport.Utils
 {
@@ -14,6 +16,33 @@ namespace NavisworksTransport.Utils
 
         #region 辅助方法
 
+        /// <summary>
+        /// 获取ModelItem的完整路径
+        /// </summary>
+        /// <param name="modelItem">模型项</param>
+        /// <returns>路径列表</returns>
+        public static List<string> GetModelItemIndexPaths(ModelItem modelItem)
+        {
+            var paths = new List<string>();
+            
+            // 转换为COM选择
+            var modelCollection = new ModelItemCollection
+            {
+                modelItem
+            };
+            var comSelection = ComApiBridge.ToInwOpSelection(modelCollection);
+            
+            // 遍历完整路径
+            foreach (ComApi.InwOaPath3 path in comSelection.Paths())
+            {
+                var pathArray = ((Array)path.ArrayData).ToArray<int>();
+                var pathKey = string.Join(",", pathArray);
+                paths.Add(pathKey);
+            }
+            
+            return paths;
+        }
+
         /// <summary>
         /// 检查一个ModelItem是否是另一个ModelItem的子节点
         /// </summary>