Function s2::predicates::triage_sign

pub fn triage_sign(a: &Point, b: &Point, c: &Point) -> Direction

triage_sign returns the direction sign of the points. It returns Indeterminate if two points are identical or the result is uncertain. Uncertain cases can be resolved, if desired, by calling expensiveSign.

The purpose of this method is to allow additional cheap tests to be done without calling expensiveSign.