class Vector3f implements Savable, Cloneable, java.io.Serializable {

    public float angleBetween(Vector3f otherVector) {
        float dotProduct = dot(otherVector);
        float angle = FastMath.acos(dotProduct);
        return angle;
    }

    public  Vector3f();
    public  Vector3f(float x, float y, float z);
    public  Vector3f(Vector3f copy);

}