`

XNet.Business/MapAgent.cs

@@ -1,4 +1,6 @@
-using DotRecast.Detour;
+using DotRecast.Core;
+using DotRecast.Detour;
+using DotRecast.Detour.Io;
 using System;
 using System.Collections.Generic;
 using System.Text;
@@ -9,55 +11,93 @@ namespace XNet.Business
     {
         public MapAgent() { }
 
-        public void Init()
+        public DtNavMesh LoadFromBabylon(string filePath)
         {
-            DtMeshData navData = new DtMeshData();
+            byte[] data = File.ReadAllBytes(filePath);
+            data[3] = 77; // 修正 Magic (TSET -> MSET)
+
+            RcByteBuffer bb = new RcByteBuffer(data);
+            bb.Order(RcByteOrder.LITTLE_ENDIAN);
+
+            int magic = bb.GetInt();
+            int version = bb.GetInt();
+            int numTiles = bb.GetInt();
+
+            DtNavMeshParams option = new DtNavMeshParams();
+            option.orig.X = bb.GetFloat();
+            option.orig.Y = bb.GetFloat();
+            option.orig.Z = bb.GetFloat();
+            option.tileWidth = bb.GetFloat();
+            option.tileHeight = bb.GetFloat();
+            option.maxTiles = bb.GetInt();
+            option.maxPolys = bb.GetInt();
+
+            // --- 关键修正点 1：探测偏移量 ---
+            // 有些版本的 Babylon 导出的 Params 后面多了一个 int (可能是 maxVertsPerPoly)
+            // 如果我们发现读出来的 dataSize 大得离谱，就尝试往后挪 4 个字节
+
+            int savedPos = bb.Position();
+            long testTileRef = bb.GetInt();
+            int testDataSize = bb.GetInt();
+
+            // 逻辑判断：如果 dataSize 超过了剩余文件大小，或者是个负数，说明对准错了
+            if (testDataSize <= 0 || testDataSize > (data.Length - bb.Position()))
+            {
+                Console.WriteLine("检测到字节对齐偏离，尝试跳过 4 字节...");
+                bb.Position(savedPos + 4); // 往后挪 4 位再试
+            }
+            else
+            {
+                bb.Position(savedPos); // 看起来是对的，退回去正常读
+            }
+            // --------------------------------
+
             DtNavMesh navMesh = new DtNavMesh();
+            navMesh.Init(option, 6);
+
+            DtMeshDataReader tileReader = new DtMeshDataReader();
+
+            for (int i = 0; i < numTiles; i++)
+            {
+                if (bb.Position() + 8 > data.Length) break;
+
+                long tileRef = bb.GetInt();
+                int dataSize = bb.GetInt();
+
+                Console.WriteLine($"Tile[{i}] Ref: {tileRef}, Size: {dataSize}");
+
+                if (dataSize <= 0 || dataSize > data.Length)
+                {
+                    Console.WriteLine("警告：dataSize 依然非法，解析中断。");
+                    break;
                 }
 
-        /// <summary>
-        /// 加载Babylon.js RecastJSPlugin生成的NavMesh数据
-        /// </summary>
-        /// <param name="navmeshBytes">JS端导出的二进制字节数组</param>
-        /// <returns>构建好的DtNavMesh</returns>
-        private static DtNavMesh LoadBabylonNavmesh(byte[] navmeshBytes)
+                byte[] tileData = new byte[dataSize];
+                Array.Copy(data, bb.Position(), tileData, 0, dataSize);
+                bb.Position(bb.Position() + dataSize);
+
+                RcByteBuffer tileBuffer = new RcByteBuffer(tileData);
+                tileBuffer.Order(RcByteOrder.LITTLE_ENDIAN);
+
+                DtMeshData meshData = tileReader.Read(tileBuffer, 6);
+                if (meshData != null)
                 {
-            try
-            {
-                // 初始化NavMesh参数（使用Detour默认参数）
-                DtNavMeshParams navMeshParams = new DtNavMeshParams
-                {
-                    orig = new DotRecast.Core.Numerics.RcVec3f(0, 0, 0), // 场景原点（需与JS端烘焙时一致）
-                    tileWidth = 16, // Tile宽度（RecastJSPlugin默认16）
-                    tileHeight = 16, // Tile高度（RecastJSPlugin默认16）
-                    maxTiles = 1024, // 最大Tile数量（根据场景调整）
-                    maxPolys = 65536 // 最大多边形数量（根据场景调整）
-                };
-
-                // 创建空的DtNavMesh
-                DtNavMesh navMesh = new DtNavMesh();
-                navMesh.Init(navMeshParams, 6);
-
-                // RecastJSPlugin的getNavmeshData返回的是单个Tile数据（大部分场景）
-                // 读取Tile数据（Detour Tile格式）
-                int tileRef = 0; // Tile索引（默认0，多Tile场景需循环解析）
-                                 // 添加Tile到NavMesh
-
-                DtMeshData dtMeshData = new DtMeshData();
-
-                //if (!status.Succeeded())
-                //{
-                //    Console.WriteLine($"添加Tile失败，状态码：{status}");
-                //    return null;
-                //}
+                    navMesh.AddTile(meshData, 0, tileRef, out long result);
+                }
+            }
 
             return navMesh;
         }
-            catch (Exception ex)
+
+        public void SampleUsage(string path)
         {
-                Console.WriteLine($"解析NavMesh失败：{ex.Message}");
-                return null;
-            }
+            DtNavMesh navMesh = LoadFromBabylon(path);
+
+            // 3. 创建查询对象
+            DtNavMeshQuery query = new DtNavMeshQuery(navMesh);
+
+            // 之后就可以进行寻路了，例如 query.FindPath(...)
+            Console.WriteLine($"NavMesh loaded. Max Tiles: {navMesh.GetMaxTiles()}");
         }
     }
 }

XNet.Business/XNet.Business.csproj

@@ -9,6 +9,7 @@
   <ItemGroup>
     <PackageReference Include="DotRecast.Detour.Crowd" Version="2025.2.1" />
     <PackageReference Include="DotRecast.Recast" Version="2025.2.1" />
+    <PackageReference Include="Microsoft.ClearScript.V8" Version="7.5.0" />
   </ItemGroup>
 
 </Project>

XNet/Controllers/MapController.cs

@@ -1,5 +1,6 @@
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
+using XNet.Business;
 
 namespace XNet.Api.Controllers
 {
@@ -10,7 +11,7 @@ namespace XNet.Api.Controllers
         [HttpGet]
         public void MapInit()
         {
-
+            new MapAgent().SampleUsage(@"D:\Rock.nav");
         }
     }
 }