public Vector3f getAxis() {
        final float q = (float) Math.sqrt(1 - w * w);
        return new Vector3f(x / q, y / q, z / q);
    }
public Vector3f getAxis() {
        final float q = (float) Math.sqrt(1 - w * w);
        return new Vector3f(x / q, y / q, z / q);
    }
public Vector3f getAxis ( ) { final float q = ( float ) Math . sqrt ( 1 - w * w ) ; return new Vector3f ( x / q , y / q , z / q ) ; }
Returns the axis of rotation for this quaternion.

@return The axis of rotation
Returns the axis of rotation for this quaternion .