private static boolean approxEqual(Vector2f u, Vector2f v) {
        float tolerance = 1E-4f;
        return (FastMath.abs(u.x - v.x) < tolerance)
                && (FastMath.abs(u.y - v.y) < tolerance);
    }
A private constructor to inhibit instantiation of this class.
jme3-core/src/main/java/com/jme3/util/TangentBinormalGenerator.java