There is a function in 1.07 called sysSetKnown. You can use that to hide/reveal nodes:
(sysSetKnown "SE" True) or (sysSetKnown "SE" Nil)
I think that does what you need.
Also, to randomize the position of nodes on the map, I was thinking of allowing a dice range in the coordinates. E.g.:
Code: Select all
<Node ID="SE" x="25-50" y="30-60">
...
</Node>