You may just find this annoying, my harping on about this, but I reckon I could work out something useful even without the source. Tell me to shut up if you want me to.
Would the following be something like the GetAsteroid() binding, assuming the class/namespace (I think namespace, but not sure) that GetAsteroid() is in is called eufloriagame.
module(L)
[
def("GetAsteroid", &eufloriagame::GetAsteroid)
];