I'd just make a define_once keyword. So if you did something like #declare
myobj box {<0,0,0>, <1,1,1> define_once}, it would know that all
substitutions of myobj would point to the same representation of the object.
thanks for the transform explanation, warp. I've spent 3 years studying
advanced maths, so the actual transformation matrix issue isn't a problem.
just the trick on the inverse. quite smart! :)
