// Update is called with fixed time step
void FixedUpdate()
{
drivetrain.ComputeVehicleMovingForce((float)v, vehicleWheelRadius, controlsThrottle, controlsShiftUp, controlsShiftDown);
resistance.ComputeDragForce(v);
resistance.ComputeRollingFrictionForce(v, drivetrain.GetVehicleMovingForce());
a = (drivetrain.GetVehicleMovingForce() + resistance.GetDragForce() + resistance.GetRollingFrictionForce()) / vehicleMass;
dv = a * Time.fixedDeltaTime;
v = v + dv;
v = Mathf.Clamp((float)v, 0, (float)drivetrain.GetMaxVelocityAtCurrentGear(vehicleWheelRadius));
ds = v * Time.fixedDeltaTime;
float x = vehicleRoot.position.x;
float y = vehicleRoot.position.y;
float z = vehicleRoot.position.z;
vehicleRoot.position = new Vector3(x, y, (float)(z - ds));
currentRPM = (int)drivetrain.GetCurrentRpm();
currentSpeedKMH = (int)Mathf.Round((float)(v * 3.6));
currentGearActual = drivetrain.GetCurrentGear();
currentDistance += ds;
}