hi,
i modified the cube geos into a cuboid geos. so one can now doing square cube rectangle and cuboid with one object, which is sometimes maybe quite useful. as i dont have a clue how to integrate a new geos into the gem library i just call it cube for me. if anyone is interested in it, u can find it at:
http://people.telecoma.net/rat/gem/cuboid.html
and aehm ;-) as i have no clue about c++ either i give no guarantie what it is doing - maybe one of the wizards take a look at the code.
cheers
erich