A while back there were a couple of posts about splines and how to measure
the length of bezier splines, find points at particular distances along
them, and move along them at constant speed without resorting to
approximation - was that problem solved? How is it done for UV mapping in
MegaPOV, approximation?
I've found a related bit of calculus which shouldn't take too long to adapt
and convert to simple formula if no-one has done this yet.
