cardinal(pt1: Vec2, m1: Vec2, m2: Vec2, pt2: Vec2, tension: number): Vec2
A second order function returning an evaluator for the given 2D Cardinal curveparampt1 Previous point
paramm1 First point
paramm2 Second point
parampt2 Next point
paramtension The tension of the curve, [0..1] from round to tight.
returnsA function which gives the value on the 2D Cardinal curve at t