static int makeIndex(final int face, final int vert) {
        assert (vert >= 0 && vert < 4 && face >= 0);
        return (face << 2) | (vert & 0x3);
    }
A private constructor to inhibit instantiation of this class.
jme3-core/src/main/java/com/jme3/util/mikktspace/MikktspaceTangentGenerator.java