pub fn elevated_chord_bound(curve: &Elevated3, a: f64, b: f64) -> Option<f64>Expand description
Certified 3D chord bound of an elevated curve over plan distances
[a, b]: sqrt(P^2 + Z^2), P = h^2 / 8 sup |k| the plan’s and Z
the profile’s chord bound at equal plan distance (see the
module documentation for the derivation).
None – unbounded, never a guess – across a chain join or a profile
seam, and where either half is not bounded.