1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
use crate::aliases::TVec3; use crate::traits::Number; /// Returns `true` if `{a, b, c}` forms a left-handed trihedron. /// /// # See also: /// /// * [`right_handed`](fn.right_handed.html) pub fn left_handed<N: Number>(a: &TVec3<N>, b: &TVec3<N>, c: &TVec3<N>) -> bool { a.cross(b).dot(c) < N::zero() } /// Returns `true` if `{a, b, c}` forms a right-handed trihedron. /// /// # See also: /// /// * [`left_handed`](fn.left_handed.html) pub fn right_handed<N: Number>(a: &TVec3<N>, b: &TVec3<N>, c: &TVec3<N>) -> bool { a.cross(b).dot(c) > N::zero() }