Here's an example.

For X, I used the P node and adjusted the first one to add X + Y.

For Y and Z, I used the P node adjusted to use X - Y.

You can make any linear combination of x, y, and z world coordinates with the P node.

Other weirder stuff is possible.

Notice the second group of props floating at a 45 degree angle. The pattern, since it is in world coordinates, has not rotated with the props. It would take model coordinates to do that and we don't have access to model coordinates in the P node. (Why I don't know - it would have been utterly trivial.)

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)