Sets the speed and acceleration for this vehicle instantaneously. Direction will be toward the goal direction if there is a goal, otherwise the current direction.
Call this on:
a vehicle
Example:
self SetSpeedImmediate(60, 15, 5);
Required Args:
1 : <speed> The speed of the vehicle in miles per hour
Optional Args
1 : <acceleration> The acceleration of the vehicle in miles per hour per second
2 : <deceleration> Deceleration. If not specified, set to be equal to half of accleration