Bay 12 Games Forum

The point is that they aren't pathing through water at all. They should path through the room by taking a diagonal path over the doors, which have dry land beneath them. Their projected path is this:


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That's all dry by virtue of the doors, and so, pathable land to the dwarfs. So they have a valid, dry path. However, when they actually open the door, the water greets them face on.

...so if there's a door, and a room filled with 6/7 water (or so) past the door, whenever someone tries to enter the room, they'll get washed away and the door will close behind them?

They wouldn't enter the room in the first place. No path, see? On the other hand...

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Just might.

Dwarf paths through the diagonals, opens the door, gets sloshed back by the water. Some means of topping up the water would be good.

Pet-impassable door, chained kitteh.

The only problem would then be building destroyers. Which can be averted if the drop zone is isolated with a retracting bridge over a moat, synced to the dropper for style points.

Blood for the blood god!

The problem is that the water changes too fast, so the pressure plate doesn't respond. They have an off hysteresis of 100 steps or the attached's off hysteresis, whichever is longer; and an on hysteresis of 0 steps or the attached's on hysteresis, whichever is longer.

So your best solution is, yes, a lever on repeat or one of the tried and true repeaters; look at the wiki under 'Repeater'.

Except [trAPAVOID] like orcs. Which will get torched by the buildingdestroyer version.

Therefore, use both!

It's simply a rather specific case of the general rules, of which Kanddak's writeup is the most detailed version of. And frankly, the pressure page on the wiki needs an overhaul, but I can't bring myself to do it...

You, sir, win +3 Internets for sheer dwarfishness.

Radically re-engineering the ocean to trap walruses= DWARFY.

I think I'd best elaborate.

Water paths preferentially in this order: Down, horizontally and lastly vertically. As such, a river, which has high drainage at one end, will fill a U-bend to just below its own water level, because the water would rather path to the nearly infinite drain (horizontally) than to its own level. However, block the river, or add more water than the drainage can handle and that last z-level will be filled. Read Kanddak's explanation of fluid dynamics, as Kenbo suggested.

To KenboCalrissian: Yay! Someone joins me in my crusade against ignorance of hydrodynamics!