could turn trains with this
Yes please, also the following outputs:
applyRotation [-180<x<180] [-180<x<180] [-180<x<180] where it would apply an adjustment to the current rotation.
addRelativeVelocity (Same things for players, except for vehicles.)
And make a plane circle a point and fire like a gunship at enemies.
Likewise, having vehicles spawn projectiles relative to their rotation and velocity would be nice.