calculating point adjacencies in a cloud

[gruedisueli]

Hi,
Is there a way in this library to create a point cloud that also contains some organization in terms of point adjacencies along the surface of a mesh? I'd like to open an OBJ file, sample a random point cloud over it, retaining some information for each point about what points are near this point on that mesh. Another way of looking at what I'm trying to do is evenly upsample a mesh where the mesh is subdivided evenly with a higher vertex count.
Thanks!