Cross Drop <direction>

On a Cross Drop, the centers come out to opposite hands, as if doing a Cross Extend. The points, as usual, have to get out of the way appropriately.

\pvdiamond{g1w,b2s,g2e,b1n} \phBB{g1n,b2s,b1n,g2s}
1 2 2 1 1 2 1 2
before Cross Drop Out after