The position along the curve, from 0 at min to 1 at max.
The value at the start of the curve.
The value at the end of the curve.
The easing curve: easeIn starts slowly, easeOut ends slowly, easeInOut does both,
in sine, quadratic, cubic and other strengths.
A value between 0 and 1, a target range and an easing curve for
math.ease.