b9f0bde16e
I added the possibilty to define Bezier/TCB splines and use them as custom easing curves. Note: Splines have a parametric definition. This means we have a function/polynom of t that evalutes to x and y. x/y = f(t). For our purpose we actually need the function y = f(x). So as a first step we have to solve the solution x = f(t) for a given t and then in a second step we evaluate y = f(t). f(t) is a cubic polynom so we use cardanos formula to solve this equation directly. For the casus irreducibilis we need 3 functions that are a combination of arcos and cos. Instead of evaluating arcos and cos we approximate these functions directly. TCB splines are converted into the corresponding cubic bezier spline. Change-Id: Id2afc15efac92e494d6358dc2e11f94e8c524da1 Reviewed-by: Aaron Kennedy <aaron.kennedy@nokia.com> |
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