ThreePointCubic constructor
Creates two cubic curves that share a common control point.
Rather than creating a new instance, consider using one of the common three-point cubic curves in Curves.
The arguments correspond to the control points for the two curves,
including the midpoint
, but do not include the two implied end points at
(0,0) and (1,1), which are fixed.
Implementation
const ThreePointCubic(this.a1, this.b1, this.midpoint, this.a2, this.b2);