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If I build a screw pump in such a way that its only exposure to outside is the top surface of its impassable tile, can it be destroyed by a building destroyer?


The exact setup is:

z-level +1:

F F F
F I F
F F F

z-level 0:

O O O
O I P
O O O

...where "F" is a floor, "O" is open space, "I" is the impassable tile of a screw pump, and "P" is the passable tile of a screw pump.

The building destroyer does not have any other valid path to the screw pump on its own z-level (I know this matters for destroying locked floor hatches from below). It is approaching from above the pump (z-level +1).

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  • Not sure, but I'd say that it is possible. As an analogy of sorts, Dorfs can acually dig down in a diagonal pattern [(x, y, z) -> (x+1, y, z-1)], while seemingly they cannot do so upwards without a ramp being present [(x, y, z) -> (x+1, y, z+1)]. I would assume the reach of building destruction being handled by similar code to digging, thus enabling creatures to reach below, but not upwards. Nov 20, 2018 at 12:39
  • Additionally, creatures might be able to climb down Nov 20, 2018 at 12:48

1 Answer 1

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No. Creatures cannot attack buildings on other Z-levels.

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  • This is not true - building destroyers can destroy buildings from the z-level below if a valid path exists to the building. Details.
    – A_S00
    Jan 6, 2019 at 0:37
  • Then why can they not destroy a locked floorhatch from below?
    – Ryan_L
    Jan 6, 2019 at 21:12
  • Typically, because the floor hatch itself is preventing them from having a valid path to its own z-level. If an alternate path exists (say, if the floor hatch is blocking one of two entrances to your fort, and the other one is unblocked), they actually can destroy a locked floor hatch from below. The details are in the wiki page I linked.
    – A_S00
    Jan 6, 2019 at 21:15

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