Exact length of a cubic f(x) = a*x^3 + b*x^2 + c*x + d:
http://www.eng.uwaterloo.ca/~ajclinto/test.html

assuming you have x=0 and x=1 as the bounds of the segment (and maybe a=1) it
would become SLIGHTly simpler, but I still doubt whether there would be any
practical use for this mess.

Andrew C


"Tony[B]" wrote:

> How can I get an exact/closely approximated measure of the distance traveled
> along a spline and the total length of it? I am using a cubic_spline in
> MegaPOV.

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