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==Temperature transfer== | ==Temperature transfer== | ||
− | Temperature transfer in ''Dwarf Fortress'' is fairly simple - every [[time|tick]], an [[item]] that is exposed to a | + | Temperature transfer in ''Dwarf Fortress'' is fairly simple - every [[time|tick]], an [[item]] that is exposed to a hotted/colder environment (or another item) will adjust its temperature by the difference (in °U) divided by the item's specific heat. Fractions are retained, but not used in calculations. For example, a piece of [[lignite]] (which has SPEC_HEAT 409) at temperature 10015 (room temperature underground) exposed to [[magma]] (temperature 12000) will heat up by (12000-10015)/409 = 4.853 °U in the first tick, then gradually slower. In order to reach its [[fire|ignition point]] of 11440, it would need to be in the magma for a total of 517 ticks, over 5 seconds at 100 [[FPS]]. |
==Bugs== | ==Bugs== | ||
* Temperature calculations are a known cause of lag. If [[maximizing framerate]] is a concern, you can disable temperature calculations through an option in [[D init.txt]]. With temperature calculations disabled, effects such as water freezing, melting, or evaporating, or creatures and items taking temperature-related damage will not occur. | * Temperature calculations are a known cause of lag. If [[maximizing framerate]] is a concern, you can disable temperature calculations through an option in [[D init.txt]]. With temperature calculations disabled, effects such as water freezing, melting, or evaporating, or creatures and items taking temperature-related damage will not occur. | ||
* When temperature calculations are disabled, dwarves will refuse to set foot in a cast [[obsidian]] tile (or any other tiles previously occupied by [[magma]]).{{bug|8391}} Occasionally, this can also occur when temperature calculations are still enabled. {{bug|1272}} | * When temperature calculations are disabled, dwarves will refuse to set foot in a cast [[obsidian]] tile (or any other tiles previously occupied by [[magma]]).{{bug|8391}} Occasionally, this can also occur when temperature calculations are still enabled. {{bug|1272}} |