pub fn chord_bound3(curve: &Curve3, a: Scalar, b: Scalar) -> Option<Scalar>Expand description
Certified chord bound of a 3D curve over [a, b]; see chord_bound2.
An elevated or banked curve over an intrinsic or a chain plan charges the
distance of its evaluated ends from the exact points (#393, #438), as an
intrinsic curve does in 2D; an intrinsic profile is not claimed by
certifies_flattening3.