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Difference between revisions of "Contaminant"
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| − | '''Contaminants''' are substances that can be spilled or smeared onto the floor or walls. These include [[mud]], [[blood]], ichor, [[extracts]], (stone) dust, ash, salt, [[vomit]], snow, and pus. | + | '''Contaminants''' are substances that can be spilled or smeared onto the floor or walls. These include [[mud]], [[blood]], ichor, [[extracts]], (stone) dust, ash, salt, [[vomit]], mucus, snow, and pus. |
==Creating Mud== | ==Creating Mud== | ||
Revision as of 08:14, 13 July 2014
| This article was migrated from DF2014:Contaminant and may be inaccurate for the current version of DF (v50.14). See this page for more information. |
v50.14 · v0.47.05 This article is about the current version of DF.Note that some content may still need to be updated. |
Contaminants are substances that can be spilled or smeared onto the floor or walls. These include mud, blood, ichor, extracts, (stone) dust, ash, salt, vomit, mucus, snow, and pus.
Creating Mud
Any time a tile is covered in water, mud will be created on that tile. It seems that magma will remove this mud upon evaporation.
Tracking
This feature has been temporarily disabled by default in fortress mode because contaminants were often spread excessively and explosively.Bug:296
The tracking of contaminants is a configurable option, which defaults to NO in Dwarf Fortress mode and YES in adventure mode. The actual options are WALKING_SPREADS_SPATTER_DWF and WALKING_SPREADS_SPATTER_ADV in d_init.txt.
Flowing
Water that flows over contaminants can pick them up, multiply them, and redistribute them as the water moves. Water does not appear to move mud, although mud will be created any time water covers a tile. The mechanics of redistributing contaminants using water is not well understood although there have been some observations of strange behavior when mixing blood and water.
- adding 7/7 water on top of a pool of blood creates more pools of blood at the edge of the water as it moves and evaporates.
- an overflowing reservoir that contains some blood creates blood everywhere the water flows.
- water will create mud on any non-muddy tile, and moving water will frequently redistribute the mud.
Removing
Removing contaminants can be accomplished by dwarves performing a cleaning. This requires a contaminant to be on a floor tile, and will (as a side effect) also remove contaminants from adjacent walls. A contaminant that is on a wall, with no adjacent contaminated floor, will never be cleaned. Contaminants are also removed if any real building is built on them (dirt roads are not buildings), even if that building is subsequently removed.
Note that atom smashing a square with a contaminant on it will not remove the contaminant.
Contaminants can be moved from creatures to floor tiles with water. The simplest and most effective way is to have the creature walk through a 2/7 or 3/7 water tile. All contaminants will be transferred from the creature to the floor, and it will walk away wet (water coverings in inventory) but otherwise uncontaminated. Another way is to drop water on a creature as it's walking over a floor grate (e.g. a waterfall). This is much more complex to set up, and has an additional drawback: a dwarf who attempts to clean the contaminated floor grate tile will be interrupted by the sudden influx of water, resulting in job cancellation spam, and an uncleaned grate (unless you temporarily turn off the waterfall).