Export Polyface Mesh Coordinates

Hi there, I'm fairly new to AutoCAD and modeling in general, so let me know if my question doesn't make much sense...

I have a series of Polyface meshes imported from a Revit project.

(If this is doable straight from Revit that'd be good too, but I haven't had any success with that)

If I right click on one and select properties, I can clearly see where each vertex has an X, Y, and Z coordinate. For the purposes of a research project, I'd like to be able to automatically export all these coordinates to any ascii format for input into an algorithm. The dataextraction command does not seem to be capable of this and only exports the number of faces and vertices of each mesh.

I'm sure this can be done by means of a custom lisp script, but I was hoping there would be an easier way to do it.

Thanks!