Dwarf Fortress > DF Dwarf Mode Discussion
Magma-safe fortifications. How?
Playbahnosh:
I designed a topside fort for my fortress, complete with crossbow towers, moat and drawbridge, then I decided to include a magma-flood pipe, just in case ::). Now, the fortifications extend from the mountainside creating a closed space, and let's say the bridge is made of bauxite.
Spoiler: Like this (click to show/hide),..,.<-mountain
.,,,________<-walls
,.,. |_|
,..,, fort |
,..,. ||<-closed drawbridge
.,., _|
,.,.______|_|<-tower
.,.,
==== <-magma pipe
..,.,.
(Sorry for the bad rendition)
So, my problem is: when I flood the valley with magma, it seeps through the fortifications. What can I do to have the fortifications so my crossbowdwarves could fire on the enemy, but when all else fails and I need to drown the attackers into molten rock, my fort would be safe on the inside?
I was thinking about building bulkheads (doors) in front of the fortifications and control them via levers, so when I open the death-pipe, I can close the bulkheads like sort of an "iron courtain" to seal off the fort and keep the magma out. But I'm afraid that a door built in front of the fortification (despite of being locked open by lever) will obstruct the view and crossbowdwarves can't shoot at the enemy.
Also, I have doubts about hot steam seeping in.
Any ideas or designs? :-\
NecroRebel:
Creatures can fire through open doors, though in terms of materials, mechanisms, and labor drawbridges are significantly more efficient.
Also, if you have the shutters on the outside of the fortifications, you'll need something for them to sit on, which can obstruct your marksdwarves' ability to fire downwards somewhat. I can't tell from your picture if your fortifications are on the level above the fortress approach or not. If they aren't, the outside shutters are of course not an issue. If they are, however, I'd recommend putting the shutters inside the fortifications where your marksdwarves would stand while firing.
Like so:
BF++++++++
BF++++++++
BF++++++++
Where the Bs are a drawbridge, the Fs are the fortifications, and the +s are floors where invaders come up or open space over the floors where the invaders come up.
Do note that unless magma flows over drawbridges while they're lowered, they won't deconstruct due to heat, so if you make sure to close the shutters before flooding the valley with magma you don't need magma-safe bridges or mechanisms.
Diamond:
As the previous poster said, bauxite drawbridges are most efficient. But alternatively, you could use floodgates instead of doors. Either inside of towers, or outside.
Playbahnosh:
--- Quote from: NecroRebel on December 05, 2009, 03:12:43 pm ---Creatures can fire through open doors, though in terms of materials, mechanisms, and labor drawbridges are significantly more efficient.
--- End quote ---
I see. But using drawbridges raises (bad pun, heh) other problems.
--- Quote ---Also, if you have the shutters on the outside of the fortifications, you'll need something for them to sit on, which can obstruct your marksdwarves' ability to fire downwards somewhat.
--- End quote ---
Yea, that's what I thought, too.
--- Quote ---I can't tell from your picture if your fortifications are on the level above the fortress approach or not.
--- End quote ---
Both. As I said, I have two arrow towers on the sides of the fort, both extending at least two z-levels up (walls too). I don't know for sure if the magma levels can reach up to the second floor during flooding, so I'll need protection for the upper arrow slits also, and that raises problems.
--- Quote ---If they aren't, the outside shutters are of course not an issue. If they are, however, I'd recommend putting the shutters inside the fortifications where your marksdwarves would stand while firing.
--- End quote ---
If I build the shutters (be it bridges, floodgates or doors) on the inside, what will happen to the dwarf standing on them when I shut them?
....x╬
i...D╬ outside
....x╬
^-shutters (x), D = dwarf
Won't they be squished?
--- Quote ---Do note that unless magma flows over drawbridges while they're lowered, they won't deconstruct due to heat, so if you make sure to close the shutters before flooding the valley with magma you don't need magma-safe bridges or mechanisms.
--- End quote ---
I see, so raised bridged actually act like solid walls in regards of magma-vulnerability? That's good to know.
NecroRebel:
--- Quote from: Playbahnosh on December 05, 2009, 03:33:01 pm ---If I build the shutters (be it bridges, floodgates or doors) on the inside, what will happen to the dwarf standing on them when I shut them?
....x╬
i...D╬ outside
....x╬
^-shutters (x), D = dwarf
Won't they be squished?
--- End quote ---
Yes, they'll get atom smashed if you use bridges. Doors or floodgates, however, simply won't close if there's a creature standing on their tile. Which, of course might be even worse since then they won't seal the fort from magma.
--- Quote ---I see, so raised bridged actually act like solid walls in regards of magma-vulnerability? That's good to know.
--- End quote ---
Essentially. More accurately, they don't take magma damage unless the magma is actually in the same tile as them, and since nothing can coexist in the same tile as a raised bridge, they are magma-immune. The same is true of closed doors and floodgates; the magma can't get into the same tile as they, so they take no damage until they're opened.
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