fn rk4_step(
pos: [f64; 3],
vel: [f64; 3],
time: f64,
dt: f64,
mu_val: f64,
thrust: &ThrustProfile,
) -> ([f64; 3], [f64; 3])Expand description
Perform one RK4 step.
Takes position [x,y,z] in km, velocity [vx,vy,vz] in km/s, time in seconds, and returns updated (pos, vel).