From 4603f3c573304d3c69d09df8b8347739d2375304 Mon Sep 17 00:00:00 2001
From: wuyanchen <307378529@qq.com>
Date: Fri, 19 Dec 2025 16:31:28 +0800
Subject: [PATCH] `
---
XNet.Business/MapAgent.cs | 126 +++++++++++++++++++----------
XNet.Business/XNet.Business.csproj | 1 +
XNet/Controllers/MapController.cs | 3 +-
3 files changed, 86 insertions(+), 44 deletions(-)
diff --git a/XNet.Business/MapAgent.cs b/XNet.Business/MapAgent.cs
index 05ae889..ec62551 100644
--- a/XNet.Business/MapAgent.cs
+++ b/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($"Tile[{i}] Ref: {tileRef}, Size: {dataSize}");
+
+ if (dataSize <= 0 || dataSize > data.Length)
+ {
+ Console.WriteLine("警告：dataSize 依然非法，解析中断。");
+ break;
+ }
+
+ byte[] tileData = new byte[dataSize];
+ Array.Copy(data, bb.Position(), tileData, 0, dataSize);
+ bb.Position(bb.Position() + dataSize);
+
+ RcByteBuffer tileBuffer = new RcByteBuffer(tileData);
+ tileBuffer.Order(RcByteOrder.LITTLE_ENDIAN);
+
+ DtMeshData meshData = tileReader.Read(tileBuffer, 6);
+ if (meshData != null)
+ {
+ navMesh.AddTile(meshData, 0, tileRef, out long result);
+ }
+ }
+
+ return navMesh;
}
- ///
- /// 加载Babylon.js RecastJSPlugin生成的NavMesh数据
- ///
- /// JS端导出的二进制字节数组
- /// 构建好的DtNavMesh
- private static DtNavMesh LoadBabylonNavmesh(byte[] navmeshBytes)
+ public void SampleUsage(string path)
{
- try
- {
- // 初始化NavMesh参数（使用Detour默认参数）
- DtNavMeshParams navMeshParams = new DtNavMeshParams
- {
- orig = new DotRecast.Core.Numerics.RcVec3f(0, 0, 0), // 场景原点（需与JS端烘焙时一致）
- tileWidth = 16, // Tile宽度（RecastJSPlugin默认16）
- tileHeight = 16, // Tile高度（RecastJSPlugin默认16）
- maxTiles = 1024, // 最大Tile数量（根据场景调整）
- maxPolys = 65536 // 最大多边形数量（根据场景调整）
- };
+ DtNavMesh navMesh = LoadFromBabylon(path);
- // 创建空的DtNavMesh
- DtNavMesh navMesh = new DtNavMesh();
- navMesh.Init(navMeshParams, 6);
+ // 3. 创建查询对象
+ DtNavMeshQuery query = new DtNavMeshQuery(navMesh);
- // RecastJSPlugin的getNavmeshData返回的是单个Tile数据（大部分场景）
- // 读取Tile数据（Detour Tile格式）
- int tileRef = 0; // Tile索引（默认0，多Tile场景需循环解析）
- // 添加Tile到NavMesh
-
- DtMeshData dtMeshData = new DtMeshData();
-
- //if (!status.Succeeded())
- //{
- // Console.WriteLine($"添加Tile失败，状态码：{status}");
- // return null;
- //}
-
- return navMesh;
- }
- catch (Exception ex)
- {
- Console.WriteLine($"解析NavMesh失败：{ex.Message}");
- return null;
- }
+ // 之后就可以进行寻路了，例如 query.FindPath(...)
+ Console.WriteLine($"NavMesh loaded. Max Tiles: {navMesh.GetMaxTiles()}");
}
}
}
diff --git a/XNet.Business/XNet.Business.csproj b/XNet.Business/XNet.Business.csproj
index d376023..720dfe7 100644
--- a/XNet.Business/XNet.Business.csproj
+++ b/XNet.Business/XNet.Business.csproj
@@ -9,6 +9,7 @@
+
diff --git a/XNet/Controllers/MapController.cs b/XNet/Controllers/MapController.cs
index c1adad9..bd00d7a 100644
--- a/XNet/Controllers/MapController.cs
+++ b/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");
}
}
}