Aircraft controller script

Questions & Answers
1

Hi,

I have the following script to control my airplane in air. I ‘stole’ some values from the wikipedia page of the F-16 aircraft and I applied those to the model in game.

void FixedUpdate()
{
	float L = 0.5f * Globals.AirDensity(transform.position.y, AltUnit.Meters) * rigidbody.velocity.magnitude * m_Planform * 2.0f * Mathf.PI * Vector3.Angle(transform.forward, Vector3.up);
    float pitch = Input.GetAxis("pitch");
    float roll = Input.GetAxis("roll");
	float yaw = Input.GetAxis("yaw");
	float finalRotFactor = m_RotSpeed * (Thrust / MaxThrust);
	

	rigidbody.AddRelativeTorque(Vector3.right * pitch * finalRotFactor, ForceMode.Impulse);
	rigidbody.AddRelativeTorque(Vector3.up * yaw * finalRotFactor, ForceMode.Impulse);
    rigidbody.AddRelativeTorque(Vector3.forward * roll * finalRotFactor * 4, ForceMode.Impulse);
	
	rigidbody.AddForce(transform.forward * Thrust * 2, ForceMode.Impulse);
	rigidbody.AddForce(Vector3.up * L, ForceMode.Force);
	
	m_Lift = L;
	m_Velocity = rigidbody.velocity.magnitude;
}

Now it kinda works. I can fly around and all that, but the moment I turn or bank, it feels like I’m drifting through the air. It’s like it still applies the force towards the old angle that the aircraft was in.

How do I stablize it to go forward and not slip ‘n’ slide all over the place? And… is this script correct? Am I doing something wrong? Thanks!

2

You need to apply ‘air resistance’ to the aircraft based on how it presents itself to the oncoming air. So if it rolls to the left and pitches up relative air pressure needs to be applied to the underside of the air craft.

3

So I need to add another force in the direction of the rotation? Not to the counter direction?