creep in room corner moves to diagonal adjacent room

[sparr]

The default map generator doesn't allow rooms to have open corners, but that's no reason for this code to be lazy. If a creep is in the corner, it should move to the diagonally adjacent room.

[tedivm]

Shouldn't a PR that does this also update Game.map.describeExits?

[sparr]

@tedivm excellent point!

That will require updating:

makeMap.describeExits
https://github.com/screeps/engine/blob/master/src/game/map.js#L18-L44

and

WorldMapGrid.prototype._buildGridData in screeps/driver. https://github.com/screeps/driver/blob/22379332c7c4132e6a9f74fc72a2a30f0c42128b/lib/runtime/mapgrid.js#L59-L121

I'll submit an update to this PR and a matching PR to screeps/driver when I get a chance.

[tedivm]

You may also need to update the find function and add new FIND_ constants for the newly available exits.

[artch]

Corner tiles aren't supposed to be exit tiles by design. I would prefer a change which makes them non-functional at all, rather than leading to diagonal rooms.

[sparr]

So if a room was, somehow, created/modified to have an accessible corner square, a creep moving there should be able to sit stationary there without changing rooms?