public static Func <T, TEx <R> > EaseD <T, R>(Func <tfloat, tfloat> easer, float maxTime,
Func <T, TEx <R> > fd, Func <T, Ex> t, Func <T, Ex, T> withT)
{
var ratTime = ExUtils.VFloat();
// x'(t) = f'(g(t)) g'(t). Where g(t) = T e(t/T): g'(t) = e'(t/T)
return(bpi => Ex.Block(new[] { ratTime },
Ex.Assign(ratTime, Clamp01(ExC(1f / maxTime).Mul(t(bpi)))),
Ex.Multiply(
DerivativeVisitor.Derivate(ratTime, E1, easer(ratTime)),
fd(withT(bpi, ExC(maxTime).Mul(easer(ratTime)))))
));
}
public static Ex Derivate(this Ex ex, Ex x, Ex dx) => DerivativeVisitor.Derivate(x, dx, ex);