Direction of rotation and ApplyForce

Questions & Answers
1

Hello, I am trying to write a function which will create a visual vector on a rigidbody. Then this vector can be rotated with mouse. When vecotr rotation is finished a force is added to that rigidbody.
My code is not working and I’d like to hear tips and suggestions. Thanks in advance for your answers.

var arrowPrefab : GameObject;
var speed : int;
var forceMultiplyer : float;

private var arrowInstance : GameObject;

function Update () {
	if (Input.GetMouseButton(1)) {
		if (arrowInstance == null) {
			arrowInstance = Instantiate(arrowPrefab, transform.position, Quaternion.identity);
		}
		else {
			if (Input.GetMouseButton(0)) {
				arrowInstance.transform.Rotate(0, 0, Input.GetAxis("Mouse Y") * Time.deltaTime * speed);
			}
			else {
				arrowInstance.transform.Rotate(Vector3(Input.GetAxis("Mouse Y"), Input.GetAxis("Mouse X"), 0) * Time.deltaTime * speed);
			}
		}
	}
	
	if (Input.GetMouseButtonUp(1)) {
		if (arrowInstance != null) {		
			var forceVector : Vector3 = new Vector3(forceMultiplyer,
													forceMultiplyer,
													forceMultiplyer);
									
			rigidbody.AddForce(arrowInstance.transform.rotation * forceVector);
			Destroy(arrowInstance);
		}
	}
}
2

If your problem is the force direction (forceVector is pointing to the middle of the 3 axes), you can use arrowInstance.transform.forward:

    if (Input.GetMouseButtonUp(1)) {
       if (arrowInstance != null) {   
         rigidbody.AddForce(arrowInstance.transform.forward * forceMultiplyer);
         Destroy(arrowInstance);
       }
    }