x need to increase monotonically

[weifeng-sc]

I use this to smooth the path, but the x of the path point is not necessarily monotonically increasing. How should I deal with it?

[Gonzalo-Mier]

A bit late, but for anyone who is interested. If your path is 2d with x and y, with n points each, you should create another variable (for example, t) that goes from 1 to n. Then, create two splines with (t, x) and (t, y).

[pockerbot]

If using 2d, is there a way i can have arc length parameterization so that I can get points based on the arc length and not the t parameter ?