private void FixedUpdate()
{
// pass the input to the car!
float h = CrossPlatformInputManager.GetAxis("Horizontal");
float v = CrossPlatformInputManager.GetAxis("Vertical");
#if !MOBILE_INPUT
float handbrake = CrossPlatformInputManager.GetAxis("Jump");
m_Car.ManualControl(h, v, -v, handbrake);
#else
m_Car.ManualControl(h, v, v, 0f);
#endif
}