quote:Original post by Eelco

quote:
i dont think a 5-control point spline would make much sense, since your control points wouldnt lie symetricly spaced around your interval. 6 control point would though. if you pick 6 convenient relations between your function on the interval 0-1 and these 6 control points, you can apply the same logic to that, and get a 6x6 matrix.

Well, the 3rd control point should lie on the middle of the spline, if my memories are right...

Anyway, I''ve got another question, maybe I should make a new post ; does someone know a method to generate the control points (or the tangent vectors at initial and final points) in function of some initial control points so that the spline "looks" nice ? I mean, the curvature should be equaly reparted along the spline and not mainly on the initial and final control point, or on the middle. Dont know if what I wrote is clear, but playing with tangent vectors should make you understand.