I haven't done this, but in theory it can be quite easy. Facet
features are usually created from a file containing tesselated geometry
(VRML, STL, 3D DXF). A tesselation file usually contains a list of
points (x,y,z), followed by a list of triangles that connects those
points. When the tesellation file is in text format, you can simply
open it in a text editor and delete everything but the points data.
Other tessellation files don't have a separate list of points, instead
it just defines a triangle as 3 points with their x/y/z data. In that
case, if you managed to cut out the points data your resulting point
cloud would include many repeated points. I'm not sure how that
affects what you want to do with it, but it's something to be aware of.
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