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Author Topic: Magma cannon - floods entire surface (5x5 embark)  (Read 3852 times)

Quietust

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Re: Magma cannon - floods entire surface (5x5 embark)
« Reply #15 on: December 16, 2011, 02:59:00 pm »

You may notice the ground outside is rather barren. This is because this world was generated before the plants rewrite, and the generic grass all got burned up and doesn't seem to regrow (but trees and bushes don't grow back too?).
I ran into the same issue with my fortresses (bug report here) and ended up writing a DFHack plugin to instantly regrow the grass on all unoccupied above-ground soil tiles - once the grass is back, the shrubs and trees will start regrowing.
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P.S. If you don't get this note, let me know and I'll write you another.
It's amazing how dwarves can make a stack of bones completely waterproof and magmaproof.
It's amazing how they can make an entire floodgate out of the bones of 2 cats.

Triaxx2

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Re: Magma cannon - floods entire surface (5x5 embark)
« Reply #16 on: December 16, 2011, 07:40:49 pm »

I must complete plans for the magma squid...
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Sting_Auer

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Re: Magma cannon - floods entire surface (5x5 embark)
« Reply #17 on: December 16, 2011, 09:24:25 pm »

Yeah, I used to build massive magma cannons like that. But then I took an arrow to the knee.



MAKE IT BIGGER!
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Thank you everyone for the help! I've since flooded the fortress I was working on and now have a new one going up.

Urist Da Vinci

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Re: Magma cannon - floods entire surface (5x5 embark)
« Reply #18 on: December 16, 2011, 09:30:51 pm »

I encountered that problem in my cannon (but never built a solution) where the magma will occasionally refuse to pump up a shaft, and you need to toggle a door or floodgate somewhere else in the system to prompt it.

Curious. Do you have any idea why this problem occurs, and why that particular solution works, or are we just marking it down as an arbitrary bug?

Rephrasing the problem: if you have a pump above ground that puts magma into an underground hallway network, you can cause magma to erupt onto the surface by opening a hatch on the ceiling of that underground network (search the forums for magma landmines). However, sometimes when you open the hatch nothing happens, even when magma should be erupting. I think this happens because the underground hallways get completely 7/7 full and are marked as "non-flowing" or "static" by the game somehow. Opening a doorway/floodgate in a alcove in the underground hallways causes magma to flow naturally into the space, removing the "static" flag or whatever, allowing the pump to function properly. I guess that the code for the pump checks for the "static" flag, and doesn't bother trying to find a spot to put the magma if the flag normally means that the space downstream of the pump is completely 7/7 full.

Yeah, I used to build massive magma cannons like that. But then I took an arrow to the knee.

MAKE IT BIGGER!
You could build multiple pump stacks in the third cavern to the surface, and multiple pump stacks from the magma sea to the top of the third cavern. Wall off the third cavern, and turn it into a map-sized magma reservoir. Once completely full, bring everything to the surface as fast as possible, covering the map in 3 z-levels thick of lava.

Triaxx2

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Re: Magma cannon - floods entire surface (5x5 embark)
« Reply #19 on: December 17, 2011, 09:33:12 am »

I tend to use sections that have four or five flood gates in groups to maximize the flow speed.
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