RigidBody Physics Flight Simulator Script Help

Questions & Answers
1

Hi,
I am new to Unity, and I am currently working on a Rigidbody-based flight physics script.
For the rotation, pitching, yawing of the plane, I am trying to use rigidbody.AddForceAtPosition.
I save this script, but unity replies with this error saying: "Assets/Standard Assets/Scripts/General Scripts/FLightSim.js(21,49): BCE0023: No appropriate version of ‘UnityEngine.Rigidbody.AddForceAtPosition’ for the argument list ‘(UnityEngine.Vector3, UnityEngine.Transform, System.Object)’ was found.”

I have no idea what is wrong with my script. Can somebody please give me a basic idea of principles of Rigid Body scripting please?

This is my current script:

var MaxThrottleStrength : float;
var LiftRatio : float;
var wingElevatorRight : Transform;
var wingElevatorLeft : Transform;
var ElevatorRight : Transform;
var ElevatorLeft : Transform;
var EngineStrength : float;
var ElevatorStrength : float;
var rotatestrength : float;

var EngineIncreaseSpeed : float;
private var Lift : float;

function Start(){
	EngineStrength = 0;
}

function FixedUpdate(){
	Lift = EngineStrength/10;
	gameObject.rigidbody.AddRelativeForce ( Vector3.forward * EngineStrength);
	gameObject.rigidbody.AddForceAtPosition ( Vector3.up * rotatestrength, wingElevatorRight, ForceMode.relativeForce );
	gameObject.rigidbody.AddForceAtPosition ( Vector3.up * rotatestrength * -1, wingElevatorLeft, ForceMode.relativeForce );
	gameObject.rigidbody.AddRelativeForce ( Vector3.up * Lift );
	gameObject.rigidbody.AddForceAtPosition ( Vector3.up * ElevatorStrength, ElevatorRight, ForceMode.relativeForce );
	gameObject.rigidbody.AddForceAtPosition ( Vector3.up * ElevatorStrength, ElevatorLeft, ForceMode.relativeForce );
}

function Update(){
	if (Input.GetButton ("Vertical1")){
		EngineStrength = EngineStrength + EngineIncreaseSpeed;
	}
	if (Input.GetButton ("Vertical2")){
		ElevatorStrength = -20;
	}
	if (Input.GetButton ("Horizontal")){
		rotatestrength = 20;
	}
	
}
2

change everything that says “AddForceAtPosition”, to just “AddForce”