The helm split removed LookDirection. The ship-gravity test asserts only Velocity
after Update, so it needs no facing; Aim keeps the value the fixture carried
(Direction already defaults to the same +z facing).
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Ship at +x in an empty zone with a slope: velocity after Update(delta) equals the
3035230b ship law scaled by delta * 60, at 1/60 and 1/30. Fails on `-=` and on a
changed delta factor.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
The law ships felt (normalize(f) * strength * (1/(1-|f|^2) - 1), gated at |f|^2 .001) is
now Zone.GravityAcceleration, per second via a 60 Hz reference rate; Ship.Update applies it
times delta, so ships push as before at 60 fps. Zone.GetForce's separate law is gone and
delegates to it. Floating-body drift at 60 fps now matches the legacy GridObject magnitude.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
