Find bezier control-points for curve passing through N points
Considering the following nice solution for finding cubic Bézier control points for a curve passing through 4 points:
I wonder, if there is a straightforward extension to this for making the Bézier curve pass through N points, for N > 2 and maybe N ≤ 20?
Answer
This is a really old question, but I'm leaving this here for people who have the same question in the future.
@divanov has mentioned that there's no Bezier curve passing through N arbitrary points for N >4.
I think the OP was asking how to compute the control points to join multiple bezier curves to produce a single curve that looks smooth.
This pdf will show you how to compute the control points: http://www.math.ucla.edu/~baker/149.1.02w/handouts/dd_splines.pdf
which I found on this writeup http://corner.squareup.com/2012/07/smoother-signatures.html from Square about how they render a smooth curve that passes through all the sampled points of a mouse drawn signature.