Trying to rotate an object based on accelerometer tilt

Target Platforms Mobile
1

I’m trying to get a ship to rotate left or right on the screen, based on whether the player is tilting the phone left or right. I can get it to acknowledge the tilt, and it seems like the rotation change works, but it also wants to rotate along the other axis. I can’t figure out why. As far as I can tell, I’m not changing them in any way. I’ve tried it on both the Z and Y axis and they both seem to work the same.
I’m using Unity 3.0 for Android, by the way.

void FixedUpdate () { 
    
        Vector3 rotationAccel = new Vector3(0,0,0);

        //forward or reverse thrust based on tilt
        dir.z = Input.acceleration.x;      
        if (dir.sqrMagnitude > 1) dir.Normalize();
        rigidbody.AddForce(dir * forceStrength);

        //rotation left or right based on tilt
        rotationAccel.z = Input.acceleration.y;
        if (rotationAccel.z > 0)
        {
            changeRot = rigidbody.rotation.z + (rotSpeed * Time.deltaTime);
            rigidbody.rotation = new Quaternion(rigidbody.rotation.x, rigidbody.rotation.y, changeRot, rigidbody.rotation.w);
        }
        else if (rotationAccel.z < 0)
        {
            changeRot = rigidbody.rotation.z - (rotSpeed * Time.deltaTime);
            rigidbody.rotation = new Quaternion(rigidbody.rotation.x, rigidbody.rotation.y, changeRot, rigidbody.rotation.w);
        }
}

Any help?

2

I was going about this completely wrong, it turns out. I didn’t understand quaternion vs euler angles. Here’s the corrected part of the code:

dir.y = Input.acceleration.y;


        if (dir.y > .2)
        {
            transform.Rotate(Vector3.up * (-rotSpeed * Time.deltaTime), Space.World);
        }
        else if (dir.y < -.2)
        {
            transform.Rotate(Vector3.up * (rotSpeed * Time.deltaTime), Space.World);
        }