The problem is the following:
Having a bezier curve B(t) we have coordinate x from the curve, and we need to obtain the y values from it, hence we need to compute the t values.
What is the fastest way to obtain the parametric value t of a bezier curve (not necessarily cubic).
Since I'm doing a realtime application it is necessary that the calculation is as fast and efficient as possible. So if you referred the method is much appreciated.