Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[abatishko]

I'm playing a 0.32.03 game (that was started with .01) and my water pressure stopped working. I'd tapped the stream, and was trying to flood a farm plot one level lower than the stream.

Side view:
~ = river
X = floodgate
. = tunnel
o = hole in the floor
< = ramp up
F = farm area

Code: [Select]

~.X...
     <..   oXFFF
       <....

Top view of Farm level:
# = wall

Code: [Select]

################
############XFFF
#####<..###o#FFF
################

After I opened the floodgate up at the stream level water flowed all the way through the system and back up to the farm level (being held back by the floodgate there). Then when I opened the floodgate on the farm level, just 7 units of water came out, and no more came up through the hole.

Have I messed thing up myself, or is this a bug?

[MrWiggles]

Its not a failure per se.

Diagonals reset pressure.

[abatishko]

Yes, I'm aware of that. The only diagonals in the system is on the level with the farm where the floodgate is diagonal to the hold where the water is supposed to come up.

The problem is that water stopped coming up through the hole in the floor.

[MrWiggles]

So its acting as a stopper?

[abatishko]

See the overhead map I drew of the farm level? The "o" there represents the hold in the floor. There is no water on that tile, although there was when the system first filled.

[MrWiggles]

And the ground level floodgate is open, right?

[abatishko]

Correct.

[MrWiggles]

Huh, neat.

And you tried closing and opening the above ground floodgate to see if it reset the pressure?

[abatishko]

Oh! Strange... As soon as I CLOSED the floodgate up at the river level, all of the sudden water started flowing up into the farm level. It of course stopped after the river level emptied out.

Then I open it again, and the water started flowing for a while, but then stopped. Definitely looks like a bug.

[abatishko]

Uploaded map to dfma for future reference. I'll submit a bug report.

[Greiger]

Ive noticed even back in 40D water seemed to only raise the water back to 1 z-level below the source.  I always thought of it as normal, but now that I think about it it could very well be a bug.

Of course I always built fail safes when taking advantage of that anyway...just in case.

[Logical2u]

Ive noticed even back in 40D water seemed to only raise the water back to 1 z-level below the source.  I always thought of it as normal, but now that I think about it it could very well be a bug.

Of course I always built fail safes when taking advantage of that anyway...just in case.

The pressure system is set up so that pressurized fluids (water and pumped magma) only flow back to 1 z-level below their starting point. See http://df.magmawiki.com/index.php/40d:Pressure for references. Not quite realistic, but handy!

Kind of intentional.

I'm actually tempted to say that this bug is a combination U-Bend/V-Bend situation, combined with the "no transfer of pressure diagonally" stuff that I've recently seen.

[MrWiggles]

Orthogonal tracking for fluid and gasses must be tricky business. Miasma can't travel diagonally either.

[Sowelu]

Probably the way that things work the way they do with regard to diagonals is to speed up flows.  Maybe in the future, the bugs will be hammered out without losing speed.

[Snall]

I hear Viagra works wonders...