Function continuous_interval 

pub fn continuous_interval<S>(
    a: Interval<S>,
    b: Interval<S>,
) -> Option<Interval<S>>
where
    S: OrderedRing,

Available on crate feature math-utils only.

Continuous intersection test of 1D axis-aligned bounding boxes (intervals).

AABBs that are merely touching return no intersection:

let a = Interval::with_minmax ( 0.0, 1.0).unwrap();
let b = Interval::with_minmax (-1.0, 0.0).unwrap();
assert!(continuous_interval (a, b).is_none());