A Primer on Bézier Curves (2011)
Whenever I dabble in type design or vector graphics I'm cursing Bézier curves. I do understand them rationally. But I just can't move the control points such that the result is what I want.It's a pity that Knuth's Metafont curve definition system (with on-curve points) hasn't gotten more attention.Or Karow's Ikarus software also had something with on-curve points, IIRC.