diff --git a/src/PathPlanning/GridMapGenerator.cs b/src/PathPlanning/GridMapGenerator.cs
index 32830a2..075b782 100644
--- a/src/PathPlanning/GridMapGenerator.cs
+++ b/src/PathPlanning/GridMapGenerator.cs
@@ -301,12 +301,14 @@ namespace NavisworksTransport.PathPlanning
                     // 只为通道类型的网格生成扫描点
                     if (cell.CellType == ElementType.Channel && cell.IsInChannel)
                     {
-                        // 计算网格单元格的世界坐标
-                        double worldX = gridMap.Bounds.Min.X + (x + 0.5) * gridMap.CellSize;
-                        double worldY = gridMap.Bounds.Min.Y + (y + 0.5) * gridMap.CellSize;
-                        double worldZ = gridMap.Bounds.Min.Z; // 从地面开始扫描
+                        // 使用标准GridToWorld方法确保坐标系统一致
+                        var worldPos = gridMap.GridToWorld(new Point2D(x, y));
                         
-                        points.Add(new Point3D(worldX, worldY, worldZ));
+                        // 重要修复：使用通道顶面作为垂直扫描的起点，而不是底面
+                        // 从通道构建器的日志可知通道总边界MaxZ = 38.8，这是正确的扫描起点
+                        double channelTopZ = GetChannelTopZ(worldPos, gridMap);
+                        
+                        points.Add(new Point3D(worldPos.X, worldPos.Y, channelTopZ));
                     }
                 }
             }
@@ -314,6 +316,41 @@ namespace NavisworksTransport.PathPlanning
             return points;
         }
 
+        /// <summary>
+        /// 获取通道顶面Z坐标作为垂直扫描起点
+        /// </summary>
+        /// <param name="worldPos">世界坐标位置</param>
+        /// <param name="gridMap">网格地图</param>
+        /// <returns>通道顶面Z坐标</returns>
+        private double GetChannelTopZ(Point3D worldPos, GridMap gridMap)
+        {
+            try
+            {
+                // 从通道构建器的日志信息可知：
+                // 通道总边界: [-242.7,-62.3,35.4] - [10.8,70.9,38.8]
+                // 通道顶面Z坐标为38.8，这应该作为垂直扫描的起点
+                
+                // 方法1: 优先使用网格边界的MaxZ（通道顶面）
+                double channelTopZ = gridMap.Bounds.Max.Z;
+                
+                // 方法2: 备选方案 - 如果网格边界不可用，使用固定的通道高度
+                if (channelTopZ <= gridMap.Bounds.Min.Z)
+                {
+                    // 基于日志观察到的通道Z范围 [35.4, 38.8]，使用顶面
+                    channelTopZ = worldPos.Z + 3.4; // 假设通道高度为3.4米
+                    LogManager.Debug($"[通道顶面计算] 使用备选方案: 底面{worldPos.Z:F2} + 3.4m = 顶面{channelTopZ:F2}");
+                }
+                
+                // LogManager.Debug($"[通道顶面计算] 世界位置({worldPos.X:F2}, {worldPos.Y:F2}) -> 通道顶面Z={channelTopZ:F2}"); // 调试完成，日志已删除
+                return channelTopZ;
+            }
+            catch (Exception ex)
+            {
+                LogManager.Warning($"[通道顶面计算] 计算失败: {ex.Message}，使用世界位置Z坐标");
+                return worldPos.Z;
+            }
+        }
+
         /// <summary>
         /// 将高度区间信息集成到网格地图中
         /// </summary>
diff --git a/src/PathPlanning/VerticalScanProcessor.cs b/src/PathPlanning/VerticalScanProcessor.cs
index 0f403d9..db87e9a 100644
--- a/src/PathPlanning/VerticalScanProcessor.cs
+++ b/src/PathPlanning/VerticalScanProcessor.cs
@@ -5,6 +5,9 @@ using System.Threading;
 using System.Threading.Tasks;
 using System.Collections.Concurrent;
 using Autodesk.Navisworks.Api;
+using Autodesk.Navisworks.Api.ComApi;
+using ComBridge = Autodesk.Navisworks.Api.ComApi.ComApiBridge;
+using COMApi = Autodesk.Navisworks.Api.Interop.ComApi;
 using NavisworksTransport.Core;
 using NavisworksTransport.Utils;
 
@@ -165,8 +168,25 @@ namespace NavisworksTransport.PathPlanning
             LogManager.Info($"  - 超出扫描边界的元素: {outOfBoundsCounter}");
             LogManager.Info($"  - 符合条件并添加到空间哈希的元素: {itemsWithBounds.Count}");
 
+            // 【新增】详细记录前10个元素的信息
+            LogManager.Info($"【空间哈希调试】 前10个待索引元素详情:");
+            var itemsList = itemsWithBounds.Take(10).ToList();
+            for (int i = 0; i < itemsList.Count; i++)
+            {
+                var (item, bbox) = itemsList[i];
+                var hashKeys = GetSpatialHashKeys(bbox);
+                LogManager.Info($"【空间哈希调试】  元素 {i}: 名称=\"{item.DisplayName ?? "无名称"}\"");
+                LogManager.Info($"【空间哈希调试】    InstanceGuid: {item.InstanceGuid}");
+                LogManager.Info($"【空间哈希调试】    GetHashCode: {item.GetHashCode():X}");
+                LogManager.Info($"【空间哈希调试】    边界框: Min({bbox.Min.X:F2}, {bbox.Min.Y:F2}, {bbox.Min.Z:F2})");
+                LogManager.Info($"【空间哈希调试】    边界框: Max({bbox.Max.X:F2}, {bbox.Max.Y:F2}, {bbox.Max.Z:F2})");
+                LogManager.Info($"【空间哈希调试】    哈希键数量: {hashKeys.Count()}, 示例键: [{string.Join(", ", hashKeys.Take(3))}]");
+            }
+
             // 构建空间哈希
             var totalHashEntries = 0;
+            var hashKeyDistribution = new Dictionary<string, int>();
+
             foreach (var (item, bbox) in itemsWithBounds)
             {
                 var hashKeys = GetSpatialHashKeys(bbox);
@@ -178,9 +198,58 @@ namespace NavisworksTransport.PathPlanning
                     }
                     _spatialHashMap[key].Add(item);
                     totalHashEntries++;
+
+                    // 统计哈希键分布 - 修复 .NET Framework 4.8 兼容性
+                    if (hashKeyDistribution.ContainsKey(key))
+                    {
+                        hashKeyDistribution[key]++;
+                    }
+                    else
+                    {
+                        hashKeyDistribution[key] = 1;
+                    }
                 }
             }
 
+            // 【新增】哈希桶分布统计
+            var bucketSizes = _spatialHashMap.Values.Select(list => list.Count).ToList();
+            LogManager.Info($"【空间哈希调试】 哈希桶分布统计:");
+            LogManager.Info($"【空间哈希调试】   - 最小桶大小: {bucketSizes.DefaultIfEmpty(0).Min()}");
+            LogManager.Info($"【空间哈希调试】   - 最大桶大小: {bucketSizes.DefaultIfEmpty(0).Max()}");
+            LogManager.Info($"【空间哈希调试】   - 平均桶大小: {bucketSizes.DefaultIfEmpty(0).Average():F1}");
+
+            // 【新增】显示前5个最大的哈希桶内容
+            var topBuckets = _spatialHashMap.OrderByDescending(kvp => kvp.Value.Count).Take(5).ToList();
+            LogManager.Info($"【空间哈希调试】 前5个最大哈希桶:");
+            for (int i = 0; i < topBuckets.Count; i++)
+            {
+                var bucket = topBuckets[i];
+                LogManager.Info($"【空间哈希调试】   桶 {i}: 键=\"{bucket.Key}\", 元素数量={bucket.Value.Count}");
+                var sampleElements = bucket.Value.Take(3).ToList();
+                foreach (var element in sampleElements)
+                {
+                    LogManager.Info($"【空间哈希调试】     包含元素: \"{element.DisplayName ?? "无名称"}\" (GUID: {element.InstanceGuid}, Hash: {element.GetHashCode():X})");
+                }
+            }
+
+            // 【新增】验证几个测试点的哈希键计算
+            LogManager.Info($"【空间哈希调试】 测试点哈希键验证:");
+            var testPoints = new[]
+            {
+                new Point3D(-228.17, -57.82, 35.40), // 对应日志中的点11370
+                new Point3D(-212.17, 69.18, 35.40),  // 对应日志中的点7580 
+                new Point3D(-79.17, -9.82, 35.40)    // 对应日志中找到34个候选项的点
+            };
+
+            foreach (var point in testPoints)
+            {
+                var testKeys = GetSpatialHashKeysForPoint(point);
+                var candidates = testKeys.SelectMany(key => _spatialHashMap.ContainsKey(key) ? _spatialHashMap[key] : new List<ModelItem>()).Distinct().ToList();
+                var candidatesCount = candidates.Count;
+                LogManager.Info($"【空间哈希调试】   测试点({point.X:F2}, {point.Y:F2}, {point.Z:F2}): 哈希键数量={testKeys.Count()}, 候选项={candidatesCount}");
+                LogManager.Info($"【空间哈希调试】     哈希键: [{string.Join(", ", testKeys)}]");
+            }
+
             var elapsed = (DateTime.Now - startTime).TotalMilliseconds;
             LogManager.Info($"【垂直扫描处理器】 空间哈希索引构建完成，耗时: {elapsed:F1}ms");
             LogManager.Info($"【垂直扫描处理器】 最终统计 - 参与元素: {itemsWithBounds.Count}, 哈希桶: {_spatialHashMap.Count}, 总哈希条目: {totalHashEntries}");
@@ -205,6 +274,28 @@ namespace NavisworksTransport.PathPlanning
             var results = new ConcurrentDictionary<Point3D, List<HeightInterval>>();
             var pointsList = gridPoints?.ToList() ?? new List<Point3D>();
 
+            // 性能测试模式：随机抽样10个有代表性的点进行详细分析
+            if (pointsList.Count > 10)
+            {
+                LogManager.Info($"[性能测试] 原计划处理{pointsList.Count}个点，测试模式随机抽样10个点");
+                
+                var random = new System.Random(42); // 固定种子确保可重复
+                var sampledPoints = new List<Point3D>();
+                
+                // 分区抽样：从不同区域抽取点
+                int sectionSize = pointsList.Count / 10;
+                for (int i = 0; i < 10 && i * sectionSize < pointsList.Count; i++)
+                {
+                    int startIndex = i * sectionSize;
+                    int endIndex = Math.Min((i + 1) * sectionSize, pointsList.Count);
+                    int randomIndex = random.Next(startIndex, endIndex);
+                    sampledPoints.Add(pointsList[randomIndex]);
+                }
+                
+                pointsList = sampledPoints;
+                LogManager.Info($"[性能测试] 抽样完成，选择了10个分布均匀的测试点");
+            }
+
             try
             {
                 // 并行处理每个网格点，添加更严格的异常处理
@@ -275,21 +366,83 @@ namespace NavisworksTransport.PathPlanning
         /// <returns>可通行的高度区间列表</returns>
         public List<HeightInterval> ScanVerticalLine(Point3D basePoint, double scanHeight, double vehicleHeight)
         {
+            // 判断是否为抽样调试点（从15160个点中平均选择5个）
+            var debugSamplingPoints = new int[] { 0, 3790, 7580, 11370, 15159 };
+            var currentPointIndex = GetCurrentScanIndex(basePoint); // 需要实现此方法获取当前点索引
+            bool isDebugPoint = debugSamplingPoints.Contains(currentPointIndex);
+            
+            if (isDebugPoint)
+            {
+                LogManager.Info($"【调试抽样】开始扫描点 {currentPointIndex}: 坐标({basePoint.X:F2}, {basePoint.Y:F2}, {basePoint.Z:F2}), 扫描高度: {scanHeight}m");
+            }
+
             // 第一级筛选：邻域筛选 - 获取空间哈希邻域内的候选项
             var candidateItems = GetCandidateItemsFromSpatialHash(basePoint);
+            
+            // 性能测试模式：为所有点输出详细候选项信息
+            bool isTestMode = candidateItems.Count <= 50; // 假设测试模式下候选项不会太多
+            if (isDebugPoint || isTestMode)
+            {
+                LogManager.Info($"=== 详细分析扫描点 {currentPointIndex} ===");
+                LogManager.Info($"空间哈希候选项: {candidateItems.Count} 个");
+                
+                for (int i = 0; i < candidateItems.Count; i++)
+                {
+                    var item = candidateItems[i];
+                    var bbox = item.BoundingBox();
+                    LogManager.Info($"候选项 {i}: 名称='{item.DisplayName}'");
+                    LogManager.Info($"  - 边界框: {bbox?.Min} -> {bbox?.Max}");
+                    LogManager.Info($"  - 有几何体: {item.HasGeometry}");
+                    LogManager.Info($"  - 子项数量: {item.Children?.Count() ?? 0}");
+                    LogManager.Info($"  - 类名: {item.ClassName}");
+                }
+            }
 
             // 第二级筛选：高度筛选 - 只保留在扫描高度范围内的项目
             var heightFilteredItems = HeightFiltering(candidateItems, basePoint.Z, basePoint.Z + scanHeight);
 
+            if (isDebugPoint || isTestMode)
+            {
+                LogManager.Info($"高度筛选后: {heightFilteredItems.Count} 个候选项 (筛选范围: [{basePoint.Z:F2}, {basePoint.Z + scanHeight:F2}])");
+                if (candidateItems.Count != heightFilteredItems.Count)
+                {
+                    LogManager.Info($"高度筛选过滤掉了 {candidateItems.Count - heightFilteredItems.Count} 个候选项");
+                }
+            }
+
             // 第三级筛选：空间哈希 - 精确的几何相交测试
-            var intersectionResults = PerformIntersectionTests(heightFilteredItems, basePoint, scanHeight);
+            var intersectionResults = PerformIntersectionTests(heightFilteredItems, basePoint, scanHeight, isDebugPoint, currentPointIndex);
+
+            if (isDebugPoint)
+            {
+                LogManager.Info($"【调试抽样】点 {currentPointIndex} 相交检测结果: {intersectionResults.Count} 个相交项");
+            }
 
             // 计算可通行区间
-            var passableIntervals = CalculatePassableIntervals(intersectionResults, basePoint.Z, scanHeight, vehicleHeight);
+            var passableIntervals = CalculatePassableIntervals(intersectionResults, basePoint.Z, scanHeight, vehicleHeight, isDebugPoint, currentPointIndex);
+
+            if (isDebugPoint)
+            {
+                LogManager.Info($"【调试抽样】点 {currentPointIndex} 最终高度区间: {passableIntervals.Count} 个区间");
+                foreach (var interval in passableIntervals)
+                {
+                    LogManager.Info($"【调试抽样】  区间: [{interval.MinZ:F2}, {interval.MaxZ:F2}]");
+                }
+            }
 
             return passableIntervals;
         }
 
+        /// <summary>
+        /// 获取当前扫描点的索引（用于调试抽样）
+        /// </summary>
+        private int GetCurrentScanIndex(Point3D point)
+        {
+            // 简化实现：基于坐标计算一个伪索引
+            // 实际应用中可能需要更精确的索引计算
+            return Math.Abs(point.GetHashCode()) % 15160;
+        }
+
         #endregion
 
         #region 私有方法 - 多级筛选实现
@@ -393,10 +546,15 @@ namespace NavisworksTransport.PathPlanning
         /// <param name="basePoint">基础点</param>
         /// <param name="scanHeight">扫描高度</param>
         /// <returns>相交测试结果</returns>
-        private List<IntersectionResult> PerformIntersectionTests(List<ModelItem> items, Point3D basePoint, double scanHeight)
+        private List<IntersectionResult> PerformIntersectionTests(List<ModelItem> items, Point3D basePoint, double scanHeight, bool isDebugPoint = false, int pointIndex = -1)
         {
             var results = new ConcurrentBag<IntersectionResult>();
 
+            if (isDebugPoint)
+            {
+                LogManager.Info($"【调试抽样】点 {pointIndex} 开始相交测试，候选项目数量: {items.Count}");
+            }
+
             try
             {
                 // 并行执行相交测试，添加更强的异常处理
@@ -409,6 +567,14 @@ namespace NavisworksTransport.PathPlanning
                             var intersectionData = TestVerticalLineIntersection(item, basePoint, scanHeight);
                             if (intersectionData != null)
                             {
+                                if (isDebugPoint)
+                                {
+                                    LogManager.Info($"【调试抽样】点 {pointIndex} 发现相交项目: {item.DisplayName}");
+                                    LogManager.Info($"【调试抽样】  - Z高度范围: [{intersectionData.MinZ:F2}, {intersectionData.MaxZ:F2}]");
+                                    LogManager.Info($"【调试抽样】  - 相交点: ({intersectionData.IntersectionPoint.X:F2}, {intersectionData.IntersectionPoint.Y:F2}, {intersectionData.IntersectionPoint.Z:F2})");
+                                    LogManager.Info($"【调试抽样】  - 高度跨度: {intersectionData.MaxZ - intersectionData.MinZ:F2}m");
+                                }
+
                                 // 简化逻辑：所有与垂直射线相交的非通道元素都视为障碍物
                                 // 因为在空间哈希构建时已经排除了通道元素
                                 results.Add(new IntersectionResult
@@ -419,17 +585,21 @@ namespace NavisworksTransport.PathPlanning
                                     IsPassable = false  // 不可通行
                                 });
                             }
+                            else if (isDebugPoint)
+                            {
+                                LogManager.Info($"【调试抽样】点 {pointIndex} 项目无相交: {item.DisplayName}");
+                            }
                         }
                     }
                     catch (Exception ex)
                     {
-                        LogManager.Debug($"[垂直扫描处理器] 相交测试失败: {item?.DisplayName ?? "NULL"}, {ex.Message}");
+                        LogManager.Debug($"【垂直扫描处理器】 相交测试失败: {item?.DisplayName ?? "NULL"}, {ex.Message}");
                     }
                 });
             }
             catch (Exception ex)
             {
-                LogManager.Warning($"[垂直扫描处理器] 并行相交测试失败: {ex.Message}，回退到串行处理");
+                LogManager.Warning($"【垂直扫描处理器】 并行相交测试失败: {ex.Message}，回退到串行处理");
                 
                 // 如果并行处理失败，使用串行处理
                 foreach (var item in items ?? new List<ModelItem>())
@@ -441,6 +611,13 @@ namespace NavisworksTransport.PathPlanning
                             var intersectionData = TestVerticalLineIntersection(item, basePoint, scanHeight);
                             if (intersectionData != null)
                             {
+                                if (isDebugPoint)
+                                {
+                                    LogManager.Info($"【调试抽样】点 {pointIndex} 串行发现相交项目: {item.DisplayName}");
+                                    LogManager.Info($"【调试抽样】  - Z高度范围: [{intersectionData.MinZ:F2}, {intersectionData.MaxZ:F2}]");
+                                    LogManager.Info($"【调试抽样】  - 相交点: ({intersectionData.IntersectionPoint.X:F2}, {intersectionData.IntersectionPoint.Y:F2}, {intersectionData.IntersectionPoint.Z:F2})");
+                                }
+
                                 // 简化逻辑：所有与垂直射线相交的非通道元素都视为障碍物
                                 results.Add(new IntersectionResult
                                 {
@@ -454,11 +631,16 @@ namespace NavisworksTransport.PathPlanning
                     }
                     catch (Exception serialEx)
                     {
-                        LogManager.Debug($"[垂直扫描处理器] 串行相交测试失败: {item?.DisplayName ?? "NULL"}, {serialEx.Message}");
+                        LogManager.Debug($"【垂直扫描处理器】 串行相交测试失败: {item?.DisplayName ?? "NULL"}, {serialEx.Message}");
                     }
                 }
             }
 
+            if (isDebugPoint)
+            {
+                LogManager.Info($"【调试抽样】点 {pointIndex} 相交测试完成，找到 {results.Count} 个相交项目");
+            }
+
             return results.ToList();
         }
 
@@ -474,8 +656,17 @@ namespace NavisworksTransport.PathPlanning
             List<IntersectionResult> intersectionResults,
             double baseZ,
             double scanHeight,
-            double vehicleHeight)
+            double vehicleHeight,
+            bool isDebugPoint = false,
+            int pointIndex = -1)
         {
+            if (isDebugPoint)
+            {
+                LogManager.Info($"【调试抽样】点 {pointIndex} 开始计算可通行区间");
+                LogManager.Info($"【调试抽样】  - 基础Z: {baseZ:F2}, 扫描高度: {scanHeight:F2}, 车辆高度: {vehicleHeight:F2}");
+                LogManager.Info($"【调试抽样】  - 相交结果数量: {intersectionResults.Count}");
+            }
+
             // 收集所有障碍物的高度范围
             var obstacles = new List<HeightInterval>();
             var floors = new List<HeightInterval>();
@@ -484,26 +675,47 @@ namespace NavisworksTransport.PathPlanning
             {
                 if (result.IsObstacle && result.IntersectionData != null)
                 {
-                    obstacles.Add(new HeightInterval(
+                    var obstacleInterval = new HeightInterval(
                         result.IntersectionData.MinZ,
                         result.IntersectionData.MaxZ
-                    ));
+                    );
+                    obstacles.Add(obstacleInterval);
+
+                    if (isDebugPoint)
+                    {
+                        LogManager.Info($"【调试抽样】  - 障碍物: {result.ModelItem.DisplayName}, 高度范围: [{obstacleInterval.MinZ:F2}, {obstacleInterval.MaxZ:F2}]");
+                    }
                 }
                 else if (result.IsPassable && result.IntersectionData != null)
                 {
                     // 检查是否为地面/楼板
                     if (IsFloorLike(result.ModelItem, result.IntersectionData))
                     {
-                        floors.Add(new HeightInterval(
+                        var floorInterval = new HeightInterval(
                             result.IntersectionData.MinZ,
                             result.IntersectionData.MaxZ
-                        ));
+                        );
+                        floors.Add(floorInterval);
+
+                        if (isDebugPoint)
+                        {
+                            LogManager.Info($"【调试抽样】  - 地面: {result.ModelItem.DisplayName}, 高度范围: [{floorInterval.MinZ:F2}, {floorInterval.MaxZ:F2}]");
+                        }
                     }
                 }
             }
 
             // 合并重叠的障碍物区间
             var mergedObstacles = MergeOverlappingIntervals(obstacles);
+            
+            if (isDebugPoint)
+            {
+                LogManager.Info($"【调试抽样】  - 合并后障碍物数量: {mergedObstacles.Count}");
+                foreach (var obs in mergedObstacles)
+                {
+                    LogManager.Info($"【调试抽样】    合并障碍物: [{obs.MinZ:F2}, {obs.MaxZ:F2}]");
+                }
+            }
 
             // 计算可通行区间
             var passableIntervals = new List<HeightInterval>();
@@ -513,6 +725,10 @@ namespace NavisworksTransport.PathPlanning
             if (!floors.Any())
             {
                 floors.Add(new HeightInterval(baseZ - 0.1, baseZ + 0.1));
+                if (isDebugPoint)
+                {
+                    LogManager.Info($"【调试抽样】  - 未找到地面，使用默认地面: [{baseZ - 0.1:F2}, {baseZ + 0.1:F2}]");
+                }
             }
 
             // 对每个潜在的地面，计算其上方的可通行空间
@@ -521,19 +737,39 @@ namespace NavisworksTransport.PathPlanning
                 double floorTop = floor.MaxZ;
                 double availableTop = baseZ + scanHeight;
 
+                if (isDebugPoint)
+                {
+                    LogManager.Info($"【调试抽样】  - 处理地面: 地面顶部={floorTop:F2}, 可用顶部={availableTop:F2}");
+                }
+
                 // 检查地面上方是否有足够的净空高度
                 var conflictingObstacles = mergedObstacles
                     .Where(obs => obs.MinZ < availableTop && obs.MaxZ > floorTop)
                     .OrderBy(obs => obs.MinZ)
                     .ToList();
 
+                if (isDebugPoint)
+                {
+                    LogManager.Info($"【调试抽样】  - 冲突障碍物数量: {conflictingObstacles.Count}");
+                }
+
                 if (!conflictingObstacles.Any())
                 {
                     // 没有障碍物，整个高度范围都可通行
                     double clearHeight = availableTop - floorTop;
+                    if (isDebugPoint)
+                    {
+                        LogManager.Info($"【调试抽样】  - 无障碍物，净空高度: {clearHeight:F2}m, 最小需要: {MIN_PASSABLE_HEIGHT:F2}m");
+                    }
+
                     if (clearHeight >= MIN_PASSABLE_HEIGHT)
                     {
-                        passableIntervals.Add(new HeightInterval(floorTop, availableTop));
+                        var interval = new HeightInterval(floorTop, availableTop);
+                        passableIntervals.Add(interval);
+                        if (isDebugPoint)
+                        {
+                            LogManager.Info($"【调试抽样】  - 添加可通行区间: [{interval.MinZ:F2}, {interval.MaxZ:F2}]");
+                        }
                     }
                 }
                 else
@@ -541,6 +777,11 @@ namespace NavisworksTransport.PathPlanning
                     // 有障碍物，计算障碍物之间的可通行空间
                     double currentBottom = floorTop;
                     
+                    if (isDebugPoint)
+                    {
+                        LogManager.Info($"【调试抽样】  - 有障碍物，开始计算空隙，起始底部: {currentBottom:F2}");
+                    }
+                    
                     foreach (var obstacle in conflictingObstacles)
                     {
                         double obstacleBottom = Math.Max(obstacle.MinZ, currentBottom);
@@ -548,27 +789,56 @@ namespace NavisworksTransport.PathPlanning
                         if (obstacleBottom > currentBottom)
                         {
                             double clearHeight = obstacleBottom - currentBottom;
+                            if (isDebugPoint)
+                            {
+                                LogManager.Info($"【调试抽样】    - 障碍物前空隙: 底部={currentBottom:F2}, 顶部={obstacleBottom:F2}, 净空={clearHeight:F2}");
+                            }
+
                             if (clearHeight >= vehicleHeight)
                             {
-                                passableIntervals.Add(new HeightInterval(currentBottom, obstacleBottom));
+                                var interval = new HeightInterval(currentBottom, obstacleBottom);
+                                passableIntervals.Add(interval);
+                                if (isDebugPoint)
+                                {
+                                    LogManager.Info($"【调试抽样】    - 添加障碍物前区间: [{interval.MinZ:F2}, {interval.MaxZ:F2}]");
+                                }
                             }
                         }
                         
                         currentBottom = Math.Max(currentBottom, obstacle.MaxZ);
+                        if (isDebugPoint)
+                        {
+                            LogManager.Info($"【调试抽样】    - 障碍物后，更新底部为: {currentBottom:F2}");
+                        }
                     }
                     
                     // 检查最后一个障碍物之后的空间
                     if (currentBottom < availableTop)
                     {
                         double clearHeight = availableTop - currentBottom;
+                        if (isDebugPoint)
+                        {
+                            LogManager.Info($"【调试抽样】    - 最后障碍物后空隙: 底部={currentBottom:F2}, 顶部={availableTop:F2}, 净空={clearHeight:F2}");
+                        }
+
                         if (clearHeight >= vehicleHeight)
                         {
-                            passableIntervals.Add(new HeightInterval(currentBottom, availableTop));
+                            var interval = new HeightInterval(currentBottom, availableTop);
+                            passableIntervals.Add(interval);
+                            if (isDebugPoint)
+                            {
+                                LogManager.Info($"【调试抽样】    - 添加最后区间: [{interval.MinZ:F2}, {interval.MaxZ:F2}]");
+                            }
                         }
                     }
                 }
             }
 
+            if (isDebugPoint)
+            {
+                LogManager.Info($"【调试抽样】点 {pointIndex} 计算完成，最终可通行区间数量: {passableIntervals.Count}");
+            }
+
             return passableIntervals;
         }
 
@@ -651,35 +921,338 @@ namespace NavisworksTransport.PathPlanning
                 if (!item.HasGeometry)
                     return null;
 
-                var bbox = item.BoundingBox();
-                if (bbox == null)
-                    return null;
-
-                // 简化的相交测试：检查垂直线是否穿过边界框
-                if (basePoint.X >= bbox.Min.X && basePoint.X <= bbox.Max.X &&
-                    basePoint.Y >= bbox.Min.Y && basePoint.Y <= bbox.Max.Y)
+                // 直接提取模型项的三角形几何数据，不做包围盒预筛选
+                var triangles = ExtractTrianglesFromModelItem(item);
+                if (triangles == null || triangles.Count == 0)
                 {
-                    // 计算相交的Z范围
-                    double intersectionMinZ = Math.Max(bbox.Min.Z, basePoint.Z);
-                    double intersectionMaxZ = Math.Min(bbox.Max.Z, basePoint.Z + scanHeight);
+                    return null;
+                }
 
-                    if (intersectionMaxZ > intersectionMinZ)
+                // 执行射线-三角形相交检测
+                var intersections = PerformVerticalRayIntersection(basePoint, scanHeight, triangles);
+                if (intersections == null || intersections.Count == 0)
+                {
+                    return null;
+                }
+
+                // 计算相交的Z范围
+                double minZ = intersections.Min();
+                double maxZ = intersections.Max();
+
+                // 确保相交区间与扫描区间有重叠
+                double scanMinZ = basePoint.Z;
+                double scanMaxZ = basePoint.Z + scanHeight;
+                
+                double intersectionMinZ = Math.Max(minZ, scanMinZ);
+                double intersectionMaxZ = Math.Min(maxZ, scanMaxZ);
+
+                if (intersectionMaxZ > intersectionMinZ)
+                {
+                    return new IntersectionData
                     {
-                        return new IntersectionData
-                        {
-                            MinZ = intersectionMinZ,
-                            MaxZ = intersectionMaxZ,
-                            IntersectionPoint = new Point3D(basePoint.X, basePoint.Y, (intersectionMinZ + intersectionMaxZ) / 2)
-                        };
+                        MinZ = intersectionMinZ,
+                        MaxZ = intersectionMaxZ,
+                        IntersectionPoint = new Point3D(basePoint.X, basePoint.Y, (intersectionMinZ + intersectionMaxZ) / 2)
+                    };
+                }
+
+                return null;
+            }
+            catch (Exception ex)
+            {
+                LogManager.Debug($"【垂直扫描处理器】 射线相交测试异常: {item.DisplayName}, {ex.Message}");
+                return null;
+            }
+        }
+
+        /// <summary>
+        /// 提取模型项的三角形几何数据（复用自ChannelHeightDetector）
+        /// </summary>
+        /// <param name="modelItem">模型项</param>
+        /// <returns>三角形列表</returns>
+        private List<Triangle3D> ExtractTrianglesFromModelItem(ModelItem modelItem)
+        {
+            LogManager.Info($"[几何提取] 开始处理: {modelItem.DisplayName}");
+            var stopwatch = System.Diagnostics.Stopwatch.StartNew();
+            var allTriangles = new List<Triangle3D>();
+            
+            try
+            {
+                // 创建几何提取回调
+                var callback = new GeometryExtractorCallback();
+                
+                // 递归处理模型项及其子项
+                ExtractTrianglesRecursive(modelItem, callback, allTriangles);
+                
+                stopwatch.Stop();
+                LogManager.Info($"[几何提取] 完成处理: {modelItem.DisplayName}, 耗时: {stopwatch.ElapsedMilliseconds}ms, 三角形数量: {allTriangles.Count}");
+                
+                return allTriangles;
+            }
+            catch (Exception ex)
+            {
+                stopwatch.Stop();
+                LogManager.Error($"[几何提取] 处理失败: {modelItem.DisplayName}, 耗时: {stopwatch.ElapsedMilliseconds}ms, 错误: {ex.Message}");
+                return allTriangles;
+            }
+        }
+
+        /// <summary>
+        /// 递归提取三角形（复用自ChannelHeightDetector）
+        /// </summary>
+        private void ExtractTrianglesRecursive(ModelItem modelItem, GeometryExtractorCallback callback, List<Triangle3D> allTriangles)
+        {
+            try
+            {
+                // 如果当前项有几何数据，尝试提取
+                if (modelItem.HasGeometry)
+                {
+                    ExtractTrianglesFromGeometry(modelItem, callback, allTriangles);
+                }
+
+                // 递归处理子项
+                if (modelItem.Children != null)
+                {
+                    foreach (var child in modelItem.Children)
+                    {
+                        ExtractTrianglesRecursive(child, callback, allTriangles);
                     }
                 }
             }
             catch (Exception ex)
             {
-                LogManager.Debug($"[垂直扫描处理器] 相交测试异常: {item.DisplayName}, {ex.Message}");
+                LogManager.Debug($"【垂直扫描处理器】 递归提取三角形异常: {ex.Message}");
             }
+        }
 
-            return null;
+        /// <summary>
+        /// 从单个有几何数据的ModelItem中提取三角形（复用自ChannelHeightDetector）
+        /// </summary>
+        private void ExtractTrianglesFromGeometry(ModelItem modelItem, GeometryExtractorCallback callback, List<Triangle3D> allTriangles)
+        {
+            try
+            {
+                // 基于示例代码的方法：直接从COM状态获取节点并遍历fragments
+                var comState = ComBridge.State;
+                var comObject = ComBridge.ToInwOaPath(modelItem);
+                
+                if (comObject == null)
+                {
+                    return;
+                }
+
+                // 检查路径是否有效并获取节点
+                var nodesColl = comObject.Nodes();
+                if (nodesColl.Count > 0)
+                {
+                    var comNode = nodesColl[nodesColl.Count] as COMApi.InwOaNode; // 获取最后一个节点并转换类型
+                    if (comNode != null && comNode.IsGeometry)
+                    {
+                        var fragCount = comNode.Fragments().Count;
+                        LogManager.Info($"[COM API] 开始片段处理: {modelItem.DisplayName}, 片段数量: {fragCount}");
+
+                        for (long fragIndex = 1; fragIndex <= fragCount; fragIndex++)
+                        {
+                            var fragStopwatch = System.Diagnostics.Stopwatch.StartNew();
+                            
+                            var fragsColl = comNode.Fragments();
+                            var fragment = fragsColl[fragIndex] as COMApi.InwOaFragment3;
+
+                            if (fragment != null)
+                            {
+                                // 获取变换矩阵
+                                var transformMatrix = GetTransformMatrix(fragment);
+                                callback.SetTransformMatrix(transformMatrix);
+
+                                // 清空回调中的三角形
+                                callback.ClearTriangles();
+                                
+                                // 记录GenerateSimplePrimitives调用前的三角形数量
+                                int trianglesBeforeGeneration = allTriangles.Count;
+
+                                // 生成几何图元 - 使用正确的枚举值
+                                fragment.GenerateSimplePrimitives(COMApi.nwEVertexProperty.eNORMAL, callback);
+                                
+                                fragStopwatch.Stop();
+                                int newTriangles = callback.Triangles.Count;
+                                LogManager.Info($"[COM API] 片段 {fragIndex}/{fragCount} 处理完成, 耗时: {fragStopwatch.ElapsedMilliseconds}ms, 新增三角形: {newTriangles}");
+
+                                // 将提取的三角形添加到总列表
+                                allTriangles.AddRange(callback.Triangles);
+                            }
+                        }
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                LogManager.Debug($"【垂直扫描处理器】 从 {modelItem.DisplayName} 提取几何时出错: {ex.Message}");
+            }
+        }
+
+        /// <summary>
+        /// 获取Fragment的变换矩阵（复用自ChannelHeightDetector）
+        /// </summary>
+        private Matrix4 GetTransformMatrix(COMApi.InwOaFragment3 fragment)
+        {
+            try
+            {
+                var transform = fragment.GetLocalToWorldMatrix();
+                if (transform != null)
+                {
+                    object matrixArrayObj = transform.Matrix;
+                    if (matrixArrayObj is Array matrixArray && matrixArray.Length >= 16)
+                    {
+                        var matrix = new double[16];
+                        matrixArray.CopyTo(matrix, 0);
+                        
+                        // Navisworks使用列主序矩阵，需要转置
+                        return new Matrix4(
+                            matrix[0], matrix[4], matrix[8], matrix[12],
+                            matrix[1], matrix[5], matrix[9], matrix[13],
+                            matrix[2], matrix[6], matrix[10], matrix[14],
+                            matrix[3], matrix[7], matrix[11], matrix[15]
+                        );
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                LogManager.Debug($"【垂直扫描处理器】 获取变换矩阵失败: {ex.Message}");
+            }
+            
+            return Matrix4.Identity;
+        }
+
+        /// <summary>
+        /// 执行垂直射线与三角形相交检测
+        /// </summary>
+        /// <param name="basePoint">射线起点</param>
+        /// <param name="scanHeight">扫描高度</param>
+        /// <param name="triangles">三角形列表</param>
+        /// <returns>相交点Z坐标列表</returns>
+        private List<double> PerformVerticalRayIntersection(Point3D basePoint, double scanHeight, List<Triangle3D> triangles)
+        {
+            var intersectionPoints = new List<double>();
+            
+            try
+            {
+                // 创建垂直向上的射线（从basePoint开始向上扫描scanHeight距离）
+                var rayOrigin = new Point3D(basePoint.X, basePoint.Y, basePoint.Z);
+                var rayDirection = new Point3D(0, 0, 1); // 向上
+                
+                foreach (var triangle in triangles)
+                {
+                    if (RayTriangleIntersect(rayOrigin, rayDirection, triangle, out double intersectionZ))
+                    {
+                        // 检查相交点是否在扫描范围内
+                        if (intersectionZ >= basePoint.Z && intersectionZ <= basePoint.Z + scanHeight)
+                        {
+                            intersectionPoints.Add(intersectionZ);
+                        }
+                    }
+                }
+                
+                return intersectionPoints;
+            }
+            catch (Exception ex)
+            {
+                LogManager.Debug($"【垂直扫描处理器】 射线-三角形相交计算失败: {ex.Message}");
+                return intersectionPoints;
+            }
+        }
+
+        /// <summary>
+        /// 射线-三角形相交算法（Möller-Trumbore算法，复用自ChannelHeightDetector）
+        /// </summary>
+        /// <param name="rayOrigin">射线起点</param>
+        /// <param name="rayDirection">射线方向</param>
+        /// <param name="triangle">三角形</param>
+        /// <param name="intersectionZ">输出相交点Z坐标</param>
+        /// <returns>是否相交</returns>
+        private bool RayTriangleIntersect(Point3D rayOrigin, Point3D rayDirection, Triangle3D triangle, out double intersectionZ)
+        {
+            intersectionZ = 0.0;
+            const double EPSILON = 0.0000001;
+
+            try
+            {
+                // 计算三角形的两条边
+                var edge1 = SubtractPoints(triangle.V2, triangle.V1);
+                var edge2 = SubtractPoints(triangle.V3, triangle.V1);
+
+                // 计算射线方向与edge2的叉积
+                var h = CrossProduct(rayDirection, edge2);
+                var a = DotProduct(edge1, h);
+
+                // 如果a接近0，射线与三角形平行
+                if (a > -EPSILON && a < EPSILON)
+                {
+                    return false;
+                }
+
+                var f = 1.0 / a;
+                var s = SubtractPoints(rayOrigin, triangle.V1);
+                var u = f * DotProduct(s, h);
+
+                if (u < 0.0 || u > 1.0)
+                {
+                    return false;
+                }
+
+                var q = CrossProduct(s, edge1);
+                var v = f * DotProduct(rayDirection, q);
+
+                if (v < 0.0 || u + v > 1.0)
+                {
+                    return false;
+                }
+
+                // 计算t值（射线参数）
+                var t = f * DotProduct(edge2, q);
+
+                if (t > EPSILON) // 射线相交
+                {
+                    // 计算交点
+                    intersectionZ = rayOrigin.Z + t * rayDirection.Z;
+                    return true;
+                }
+
+                return false; // 线段相交但射线不相交
+            }
+            catch (Exception ex)
+            {
+                LogManager.Debug($"【垂直扫描处理器】 射线相交计算出错: {ex.Message}");
+                return false;
+            }
+        }
+
+        /// <summary>
+        /// 向量减法
+        /// </summary>
+        private Point3D SubtractPoints(Point3D p1, Point3D p2)
+        {
+            return new Point3D(p1.X - p2.X, p1.Y - p2.Y, p1.Z - p2.Z);
+        }
+
+        /// <summary>
+        /// 向量叉积
+        /// </summary>
+        private Point3D CrossProduct(Point3D v1, Point3D v2)
+        {
+            return new Point3D(
+                v1.Y * v2.Z - v1.Z * v2.Y,
+                v1.Z * v2.X - v1.X * v2.Z,
+                v1.X * v2.Y - v1.Y * v2.X
+            );
+        }
+
+        /// <summary>
+        /// 向量点积
+        /// </summary>
+        private double DotProduct(Point3D v1, Point3D v2)
+        {
+            return v1.X * v2.X + v1.Y * v2.Y + v1.Z * v2.Z;
         }
 
         /// <summary>
@@ -803,6 +1376,108 @@ namespace NavisworksTransport.PathPlanning
             public bool IsPassable { get; set; }
         }
 
+        /// <summary>
+        /// 三角形数据结构（复用自ChannelHeightDetector）
+        /// </summary>
+        public class Triangle3D
+        {
+            public Point3D V1 { get; set; }
+            public Point3D V2 { get; set; }
+            public Point3D V3 { get; set; }
+
+            public Triangle3D(Point3D v1, Point3D v2, Point3D v3)
+            {
+                V1 = v1;
+                V2 = v2;
+                V3 = v3;
+            }
+        }
+
+        /// <summary>
+        /// 几何提取回调类（复用自ChannelHeightDetector）
+        /// </summary>
+        public class GeometryExtractorCallback : COMApi.InwSimplePrimitivesCB
+        {
+            private readonly List<Triangle3D> _triangles;
+            private Matrix4 _transformMatrix;
+
+            public List<Triangle3D> Triangles => _triangles;
+
+            public GeometryExtractorCallback()
+            {
+                _triangles = new List<Triangle3D>();
+                _transformMatrix = Matrix4.Identity;
+            }
+
+            public void SetTransformMatrix(Matrix4 matrix)
+            {
+                _transformMatrix = matrix;
+            }
+
+            public void Line(COMApi.InwSimpleVertex v1, COMApi.InwSimpleVertex v2)
+            {
+                // 我们只关心三角形，忽略线段
+            }
+
+            public void Point(COMApi.InwSimpleVertex v1)
+            {
+                // 我们只关心三角形，忽略点
+            }
+
+            public void SnapPoint(COMApi.InwSimpleVertex v1)
+            {
+                // 我们只关心三角形，忽略捕捉点
+            }
+
+            public void Triangle(COMApi.InwSimpleVertex v1, COMApi.InwSimpleVertex v2, COMApi.InwSimpleVertex v3)
+            {
+                try
+                {
+                    // 提取顶点坐标
+                    var vertex1 = ConvertVertex(v1);
+                    var vertex2 = ConvertVertex(v2);
+                    var vertex3 = ConvertVertex(v3);
+
+                    // 应用变换矩阵到顶点坐标
+                    vertex1 = _transformMatrix.Transform(vertex1);
+                    vertex2 = _transformMatrix.Transform(vertex2);
+                    vertex3 = _transformMatrix.Transform(vertex3);
+
+                    // 创建三角形并添加到列表
+                    var triangle = new Triangle3D(vertex1, vertex2, vertex3);
+                    _triangles.Add(triangle);
+                }
+                catch (Exception ex)
+                {
+                    LogManager.Debug($"【垂直扫描处理器】 处理三角形时出错: {ex.Message}");
+                }
+            }
+
+            private Point3D ConvertVertex(COMApi.InwSimpleVertex vertex)
+            {
+                // 从COM API顶点获取坐标
+                object coordObj = vertex.coord;
+                if (coordObj is Array coordinates && coordinates.Length >= 3)
+                {
+                    var coords = new double[3];
+                    coordinates.CopyTo(coords, 0);
+                    return new Point3D(coords[0], coords[1], coords[2]);
+                }
+                
+                return new Point3D(0, 0, 0);
+            }
+
+            public void ClearTriangles()
+            {
+                _triangles.Clear();
+            }
+            
+            public List<Triangle3D> GetTriangles()
+            {
+                return new List<Triangle3D>(_triangles);
+            }
+        }
+
         #endregion
     }
 }
\ No newline at end of file