pub fn minkowski_interval(dt: f64, dx: f64, dy: f64, dz: f64, c: f64) -> f64Expand description
The Minkowski interval s² = −c²·Δt² + Δx² + Δy² + Δz² (signature −+++) between two events.
s² < 0 timelike, = 0 lightlike (on the light cone), > 0 spacelike.