[camlorn]

I know that much, dentin--I just don't understand all of it, mainly because I can't see everything it calls.

Didn't know floats and doubles were precise enough for this--it was my understanding that by the time you got to the integer overflow range, you're relatively close to the point at which you start rapidly losing precision. I suppose, however, it's better than a crash or something from wierd negative distances. Clearly I don't fully understand floats--do you have any online stuff that does a good job of explaining it, and where you start losing precision?

I'm not going to go through KaVir's function line-by-line saying what I don't understand; that's what I'd have to do to answer the question of what I don't understand about it, probably. That said, I don't believe in black boxes, with all the negatives that implies, and won't admit to understanding until I understand pretty much every line inside and out.