byte value000 = dv.getDensity(x - l, y - l, z - l),
                value001 = dv.getDensity(x - l, y - l, z),
                value002 = dv.getDensity(x - l, y - l, z + l),
                value100 = dv.getDensity(x, y - l, z - l),
                value101 = dv.getDensity(x, y - l, z),
                value102 = dv.getDensity(x, y - l, z + l),
                value200 = dv.getDensity(x + l, y - l, z - l),
                value201 = dv.getDensity(x + l, y - l, z),
                value202 = dv.getDensity(x + l, y - l, z + l),
                value010 = dv.getDensity(x - l, y, z - l),
                value011 = dv.getDensity(x - l, y, z),
                value012 = dv.getDensity(x - l, y, z + l),
                value110 = dv.getDensity(x, y, z - l),
                // value111 = dv.getDensity(x , y , z ), // unused
                value112 = dv.getDensity(x, y, z + l),
                value210 = dv.getDensity(x + l, y, z - l),
                value211 = dv.getDensity(x + l, y, z),
                value212 = dv.getDensity(x + l, y, z + l),
                value020 = dv.getDensity(x - l, y + l, z - l),
                value021 = dv.getDensity(x - l, y + l, z),
                value022 = dv.getDensity(x - l, y + l, z + l),
                value120 = dv.getDensity(x, y + l, z - l),
                value121 = dv.getDensity(x, y + l, z),
                value122 = dv.getDensity(x, y + l, z + l),
                value220 = dv.getDensity(x + l, y + l, z - l),
                value221 = dv.getDensity(x + l, y + l, z),
                value222 = dv.getDensity(x + l, y + l, z + l);
        Vector3f res = new Vector3f(value000 + 2 * value001 + value002
                + 2 * value010 + 4 * value011 + 2 * value012
                + value020 + 2 * value021 + value022
                + -value200 - 2 * value201 - value202
                + -2 * value210 - 4 * value211 - 2 * value212
                + -value220 - 2 * value221 - value222,
                value000 + 2 * value001 + value002
                + 2 * value100 + 4 * value101 + 2 * value102
                + value200 + 2 * value201 + value202
                + -value020 - 2 * value021 - value022
                + -2 * value120 - 4 * value121 - 2 * value122
                + -value220 - 2 * value221 - value222,
                value000 + 2 * value010 + value020
                + 2 * value100 + 4 * value110 + 2 * value120
                + value200 + 2 * value210 + value220
                + -value002 - 2 * value012 - value022
                + -2 * value102 - 4 * value112 - 2 * value122
                + -value202 - 2 * value212 - value222);