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Editing Flow
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| − | {{ | + | {{quality|masterwork}} |
| − | + | :''The term '''flow''' can be used to refer to several completely different things in Dwarf Fortress: things like [[miasma]] and [[smoke]], and the mechanism by which [[water]] and [[magma]] move. This article describes the latter.'' | |
| − | '''Flow''' is a game mechanic used to simulate the motion of '''fluids'''. The two fluids that exist in | + | {{Material properties}} |
| − | *Note: In the current release | + | '''Flow''' is a game mechanic used to simulate the motion of '''fluids'''. The two fluids that exist in dwarf fortress currently are '''[[water]]''' and '''[[magma]]'''. You can identify fluids that are flowing by looking for a tile that is blinking between {{Tile|≈|1:0:1}} and {{Tile|~|1:0:1}} tiles. If you have turned on [[Technical_tricks#Tiles|SHOW_FLOW_AMOUNTS]] you will see the fluid '''depth''' indicator of {{Tile|1|1:0:1}} through {{Tile|7|1:0:1}} instead and will not be able to easily tell if the game considers a tile to be flowing or not. Flow is typically present any time a fluid is in motion, but there are some exceptions which confuse things a bit. |
| + | *Note: In the current release flow does not seem to appear in magma. Magma follows the same rules of fluid motion and flow, it simply doesn't have flow in the sense that would allow it to power a water wheel. | ||
==Basic Fluid Motion== | ==Basic Fluid Motion== | ||
| − | '''[[Water]]''' and '''[[magma]]''' both move in much the same way | + | '''[[Water]]''' and '''[[magma]]''' both move in much the same way following a fairly simple set of rules. The only difference between the motion of [[magma]] and water is that magma behaves differently with regards to [[pressure]]. |
Fluids move mostly as one might expect: they will fall straight down if they can, or else they will spread out to the sides. Fluids can flow diagonally on the same z-level, but will never move sideways and down at the same time. Under basic fluid motion, fluid never moves back up, but it can appear to do so if pressure is involved. | Fluids move mostly as one might expect: they will fall straight down if they can, or else they will spread out to the sides. Fluids can flow diagonally on the same z-level, but will never move sideways and down at the same time. Under basic fluid motion, fluid never moves back up, but it can appear to do so if pressure is involved. | ||
| − | Here is a quick example of how fluids can move to adjacent tiles. Also | + | Here is a quick example of how fluids can move to adjacent tiles. Also as water moves to an adjacent tile flow is generated in both tiles. This flow will remain for a short time before reverting to being non-flowing water. Falling water does ''not'' generate flow, so only the 3rd example will result in flow (in both tiles). |
'''Before (side view)''' | '''Before (side view)''' | ||
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:''(see also '''[[magma piston]])''''' | :''(see also '''[[magma piston]])''''' | ||
| − | There's one way to push a fluid higher than its starting level, but it might be considered a bug | + | There's one way to push a fluid higher than its starting level, but it might be considered a bug on the flow mechanics and probably will be changed in following versions since allows for what could be considered exploits. |
A ''natural'' wall of any material '''[[cave-in|falling]]''' onto either water ''or'' '''[[magma]]''' will teleport each tile of displaced fluid to open space directly above it, leaving 1 additional tile of open space directly above the wall itself: | A ''natural'' wall of any material '''[[cave-in|falling]]''' onto either water ''or'' '''[[magma]]''' will teleport each tile of displaced fluid to open space directly above it, leaving 1 additional tile of open space directly above the wall itself: | ||
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▒▒▒▒▒ ▒▒▒▒▒ ▒▒▒▒▒ | ▒▒▒▒▒ ▒▒▒▒▒ ▒▒▒▒▒ | ||
</diagram> | </diagram> | ||
| − | When done in | + | When done in an u-bend example the pushing above original fluid level can be easily appreciated, although it breaks the laws of regular fluid physics: |
<diagram> | <diagram> | ||
Start Step 1 Step 2 | Start Step 1 Step 2 | ||
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▒▒▒▒▒▒▒ ▒▒▒▒▒▒▒ ▒▒▒▒▒▒▒ | ▒▒▒▒▒▒▒ ▒▒▒▒▒▒▒ ▒▒▒▒▒▒▒ | ||
</diagram> | </diagram> | ||
| − | This is the basic principle that the '''[[magma piston]]''' | + | This is the basic principle that the '''[[magma piston]]''' exploit, if you want to anticipate a future fix or simply want to simulate regular physics fluid behaviour, you can do something like this: |
<diagram> | <diagram> | ||
z-level Start Step 1 Step 2 | z-level Start Step 1 Step 2 | ||