I'm trying to understand quadratic Bézier curves but I cannot get pass one thing. Please, what is a "curvature" and how can I calculate it?
I'm asking because I found for instance this and this.
I also saw:
$$\text{Curvature}\, = \,(P1x - P2x)(P3y - P2y) - (P3x - P2x)(P1y - P2y) $$ where $P1$, $P2$, $P3$ are points defining the curve.
There is the problem, I don't see how one could arrive to such formula. Could someone explain it to me?