Limit LocalNavMeshBuilder to children only...

If anyone is interested here's how I modified LocalNavMeshBuilder and NavMeshSourceTag.cs to collect only children of the LocalNavMeshBuilder gameobject:

add this to NavMeshSourceTag.cs

Code (CSharp):

1.  /// <summary>
2.         /// Collect all the navmesh build sources for enabled objects tagged by this component
3.         /// </summary>
4.         /// <param name="sources">Collected NavMesh build sources</param>
5.         public static void CollectChildrenOnly(GameObject thisGO, ref List<NavMeshBuildSource> sources)
6.         {
7.             sources.Clear();
8.  
9.             for (var i = 0; i < m_Meshes.Count; ++i)
10.             {
11.                 var mf = m_Meshes[i];
12.                 if (mf == null)
13.                     continue;
14.  
15.                 if (!mf.transform.IsChildOf(thisGO.transform))
16.                     continue;
17.  
18.                     var m = mf.sharedMesh;
19.                 if (m == null)
20.                     continue;
21.  
22.                 var s = new NavMeshBuildSource();
23.                 s.shape = NavMeshBuildSourceShape.Mesh;
24.                 s.sourceObject = m;
25.  
26.                 s.transform = mf.transform.localToWorldMatrix;
27.                 s.area = 0;
28.                 sources.Add(s);
29.             }
30.  
31.             for (var i = 0; i < m_Terrains.Count; ++i)
32.             {
33.                 var t = m_Terrains[i];
34.                 if (t == null)
35.                     continue;
36.                 if (!t.transform.IsChildOf(thisGO.transform))
37.                     continue;
38.  
39.  
40.                 var s = new NavMeshBuildSource();
41.                 s.shape = NavMeshBuildSourceShape.Terrain;
42.                 s.sourceObject = t.terrainData;
43.                 // Terrain system only supports translation - so we pass translation only to back-end
44.                 s.transform = Matrix4x4.TRS(t.transform.position, Quaternion.identity, Vector3.one);
45.                 s.area = 0;
46.                 sources.Add(s);
47.             }
48.         }

Add this to top of UpdateNavMesh in LocalNavMeshBuilder:

Code (CSharp):

1.             if (CollectChildrenOnly)
2.                 NavMeshSourceTag.CollectChildrenOnly(thisGO, ref m_Sources);
3.             else
4.                 NavMeshSourceTag.Collect(ref m_Sources);

add this to top of LocalNavMeshBuilder:

Code (CSharp):

1.         private GameObject thisGO;
2.  
3.         [SerializeField]
4.         private bool CollectChildrenOnly= false;
5.        

aaaand lastly edit OnEnable() in LocalNavMeshBuilder to include:

Code (CSharp):

1.  
2.  void OnEnable()
3.         {
4.             if (thisGO == null)
5.                 thisGO = this.gameObject;
6.  

I'm no expert so if anyone has any suggestions to improve this feel free to suggestions...