Access NavMeshSurface vertices

Hi to all, this could seem a bit odd, but.. is there a way to access NavMeshSurface vertices?
I know that If I have a Navmesh, I can do:

verts as (Vector3)
ids as (int)
NavMesh.Triangulate(verts, ids)
mesh = Mesh()
mesh.vertices = verts
mesh.triangles = ids
meshFilter.mesh = mesh

..but what if I have a Navmeshsurface instead?

 

As far as I know the NavMeshSurface is only used to mark areas for the NavMeshBuilder to be used in creating the navmesh. It doesn't contain any actual navmesh data, so there's nothing to access.

 

Not true: I build the navmesh at runtime using NavmeshSurface:

Code (CSharp):

1. for (int i = 0; i < surfaces.Length; i++)
2.         {
3.             surfaces [i].BuildNavMesh ();  
4.         }  

How can I access the vertices of the built navmesh?

 

You can get the verts of all NavMeshes by using NavMesh.CalculateTriangulation() and access the vertices array in the returned NavMeshTriangulation. Keep in mind this will be ALL NavMesh data, not limited to a NavMeshSurface, and the NavmeshSurface doesn't seem to have anything to return its triangulation based on only its own data to you.
It's also apparently impossible to calculate triangulation using a given set of data, there's no argumented version of that function anywhere.