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[Sowelu]

If I have several floors and supports organized like this (side view):

code:

_________
____I____
____I____
____I____
#########

...so there's no stone above the top floor, and they are not connected to anything at the sides.  If I want to annihilate the top three floors, do I have to trigger ALL FOUR supports, or can I do it by only triggering the BOTTOM support?

(Micromanaging channeling out 75x75x15 is getting really old really fast.)

[Thasero]

You only need to trigger the bottom support.  Everything that is not connected to stable rock will collapse at that point.  The fact that the upper three floors are connected to each other won't matter, since they will no longer be connected to non-collapsing ground.

Furthermore, cave-ins can and will punch a hole through any area that is just a floor.  i.e. if you mine out a particular square at Z=0 and at Z=-1 so there's nothing left but the floor between Z=0 and Z=-1, then a cave-in hits that point, it will break the floor.  This means that if you're in a typical multiple-level fortress where consecutive floors have been mined out into large rooms, a cave-in at the top can Swiss-cheese your fortress all the way to the bottom - be careful!

[gerkinzola]

so you can collapse any one of the floors and it will destroy the whole lot

[SHAD0Wdump]

Now the trick of finding a brave dwarf...

[Keldor]

Who needs a brave dwarf where a mechanic can do the job completely safely?  Just link the support to a lever.

[Derakon]

quote:Originally posted by Keldor:
<STRONG>Who needs a brave dwarf where a mechanic can do the job completely safely?  Just link the support to a lever.</STRONG>

Depends on how extensively he mined out those floors. There might not be a safe place to stand left...

[RickiusMaximus]

I would suggest leaving a single channel hole in the collapsing floor and see if you can get it to land on the lever pulling dwarf without hitting him- dont forget to allow for the time it takes the lever to work and the distance the dwarf can move in this time!

[Tayrin]

quote:Originally posted by RickiusMaximus:
<STRONG>I would suggest leaving a single channel hole in the collapsing floor and see if you can get it to land on the lever pulling dwarf without hitting him- dont forget to allow for the time it takes the lever to work and the distance the dwarf can move in this time!</STRONG>

I don't think there'll be any need to time it correctly; supports react instantaneously.

I'm not sure that falling walls of rock stay held together, though. I suspect each wall tile might fall down until individually hitting something solid, but I've not tested it myself.

Edit: Clarification.

[ April 23, 2008: Message edited by: Tayrin ]

[Kagus]

Actually, from what I could tell in my limited experience, it's really quite accurate.  The stone will continue straight down without deviation, although the dust will spread quite far and in an erratic fashion.

[IronValley]

On the topic of pancaking, does anyone know how mutch force is needed to knock away an undug tile from the floor below? I want to knock a hole in the borrom of the world, and create my own chasm....

[Jay]

I'm pretty sure a single tile of unmined rock will punch through a single tile of unmined rock.

Somebody feel free to clarify/deny, I'm still scared of cave-ins since one caused by a goblin/kobold (can't remember which) that pulled the lever for the supports on my 69 z-level tower-fort...
You ever seen 80 dwarves and some 20 various critters (who I had chained up in various rooms of the tower) die at once in a collapse that obliterates the entire map (Z-level wise, considering there were only 15 stories of rock below me)?  It is NOT pretty.
Well, it is pretty, but not if you're the one who's supposed to be managing the fort.

[Derakon]

quote:Originally posted by IronValley:
<STRONG>On the topic of pancaking, does anyone know how mutch force is needed to knock away an undug tile from the floor below? I want to knock a hole in the borrom of the world, and create my own chasm....</STRONG>

I doubt this would work; there's no void "under" the available space; it's just more rock all the way down to the core...

[IronValley]

A guy on the Somethingawful forums mentioned knocking a hole in the world with a massive cave in, however since the forums are no longer viewable as a guest, and I'm too broke to register yet, I can't dig it up.

I'm going to make some tests with dropping large bulks of rock down on the lowest Z level, then I'll test with dropping rock down on a Hidden Fun Stuff spawner  

Edit: Does anyone know how force is calculated in DF? Does speed matter, or is it only mass? and if speed matters, how many squares would it take to reach maximum velocity?

[ April 23, 2008: Message edited by: IronValley ]

[grelphy]

I don't think dropping the floor around the dwarf at the lever will work. It's true that floors fall straight down, but the resulting dust cloud blasts dwarves every which way, and I have lost plenty of miners who got sucked into the vortex created by a collapsing bit of ceiling.

So you'll end up with a beautiful uncluttered hole around the lever, and a dwarf corpse three tiles away.

Which would still be fun...

[Lalandrathon]

Mabye if it was a pit 1 z level below where the rest of the carnage would be happening? Of course, you'd have to have it be at least 2x1 so the dwarf would have a stair/ramp in.