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Editing v0.34:Temperature
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− | {{ | + | {{quality|Fine|15:51 27 December 2011 (UTC)}}{{av}} |
− | {{av}} | ||
''For temperature as it relates to choosing an embarkation site, see [[Climate]].'' | ''For temperature as it relates to choosing an embarkation site, see [[Climate]].'' | ||
− | |||
==Temperature scale== | ==Temperature scale== | ||
− | + | Dwarf Fortress uses its own temperature scale in most cases, often called "Degrees [[Main:Urist|Urist]]" on this wiki. | |
+ | So if you see something like [HOMEOTHERM:10067], don't be amazed. | ||
− | + | [[Magma]]'s temperature is 12,000° Urist. | |
− | + | ||
− | + | The highest possible temperature in Dwarf Fortress is 60,000°U - the temperature 60,001°U is used internally for temperatures which have been set to "NONE". | |
− | + | ||
+ | ===Conversion=== | ||
+ | |||
+ | [DF scale] = [FAHRENHEIT] + 9968 | ||
+ | |||
+ | [DF scale] = [CELSIUS] * 9/5 + 10000 | ||
+ | |||
+ | [DF scale] = [KELVIN] * 9/5 + 9508.33 | ||
+ | |||
+ | [DF scale] = [RANKINE] + 9508.33 | ||
+ | |||
+ | ''(Note: Mod-makers may find this [http://www.bay12forums.com/smf/index.php?topic=80523.0 Temperature Conversion Utility] handy if they find themselves having to convert a lot of temperatures to and/or from Degrees Urist.)'' | ||
+ | |||
+ | ===Reference Chart=== | ||
− | |||
{| {{prettytable}} | {| {{prettytable}} | ||
|- bgcolor="#ddd" | |- bgcolor="#ddd" | ||
Line 22: | Line 33: | ||
! Kelvin | ! Kelvin | ||
! Rankine | ! Rankine | ||
+ | |||
|- | |- | ||
− | + | | Boiling Point of Water | |
| 10180 | | 10180 | ||
| 212 | | 212 | ||
Line 29: | Line 41: | ||
| 373.15 | | 373.15 | ||
| 671.67 | | 671.67 | ||
+ | |||
|- | |- | ||
− | + | |Human Body Temperature | |
− | | | + | | 10066.6<sup>2</sup> |
| 98.6 | | 98.6 | ||
| 37.0 | | 37.0 | ||
| 310.15 | | 310.15 | ||
| 558.27 | | 558.27 | ||
+ | |||
|- | |- | ||
− | + | | Freezing Point of Water | |
| 10000 | | 10000 | ||
| 32 | | 32 | ||
Line 43: | Line 57: | ||
| 273.15 | | 273.15 | ||
| 491.67 | | 491.67 | ||
+ | |||
|- | |- | ||
− | + | | Absolute Zero | |
− | | 9508<sup> | + | | 9508.33<sup>2</sup> |
| -459.67 | | -459.67 | ||
| −273.15 | | −273.15 | ||
| 0 | | 0 | ||
| 0 | | 0 | ||
+ | |||
|- | |- | ||
− | | Zero | + | | DF Scale's Zero<sup>1</sup> |
| 0 | | 0 | ||
| -9968 | | -9968 | ||
− | | -5555. | + | | -5555.555... |
− | | -5282. | + | | -5282.40555... |
| -9508.33 | | -9508.33 | ||
|} | |} | ||
− | + | <small> | |
+ | :<sup>1</sup> - Yes, temperatures in Dwarf Fortress can go '''far, far''' below absolute zero, which is physically impossible. Considering Dwarf Fortress also allows [[water wheel#Perpetual motion|perpetual motion]], it's best not to ask questions. | ||
+ | :<sup>2</sup> - Technically, fractional/decimal temperatures are not possible in Dwarf Fortress, as they are stored as unsigned 16-bit integers. For instance, body temp for humans in the raws is rounded to 10067. | ||
+ | </small> | ||
− | + | Some general information about temperatures in DF (copied from somewhere on the forums): | |
− | + | {| class="prettytable" | |
− | |||
− | {| class=" | ||
|- | |- | ||
! Event / location | ! Event / location | ||
! Temperature | ! Temperature | ||
|- | |- | ||
− | | | + | | alcohol freezes |
− | | | + | | 9850 U |
|- | |- | ||
− | | | + | | water freezes |
− | | | + | | 10000 U |
|- | |- | ||
− | | | + | | underground |
− | | | + | | 10015 U |
|- | |- | ||
− | | | + | | outside (varies) |
− | | | + | | 10048 U |
|- | |- | ||
− | | | + | | dwarf/human body temp |
− | | | + | | 10067 U |
|- | |- | ||
− | | | + | | floor above magma |
− | | | + | | 10075 U |
|- | |- | ||
− | | | + | | fat melts |
− | | | + | | 10078 U |
|- | |- | ||
− | | | + | | water boils |
− | | | + | | 10180 U |
|- | |- | ||
− | | | + | | material is fire-safe |
− | | | + | | 11000 U |
|- | |- | ||
− | | | + | | common stone melts |
− | | | + | | 11500 U |
|- | |- | ||
− | | | + | | burning item (max) |
− | | | + | | 11640 U |
|- | |- | ||
− | | | + | | magma |
− | + | | 12000 U | |
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|- | |- | ||
|} | |} | ||
− | == | + | ==Melting point== |
− | + | ||
− | + | This is the temperature at which the material will melt. | |
− | + | ||
− | + | ==Boiling point== | |
− | + | ||
− | + | This is the temperature at which the material will evaporate. | |
− | + | ||
− | + | ==Ignition point== | |
− | + | ||
+ | This is the temperature at which the material will catch fire. | ||
+ | |||
+ | ==Heat damage point== | ||
+ | |||
+ | This is the temperature above which the material will begin to take heat [[wear|damage]]. Burning items without a heat damage point (or with an exceptionally high one) will take damage very slowly, causing them to burn for a very long time (9 months and 16.8 days) before disappearing. | ||
+ | |||
+ | ==Cold damage point== | ||
+ | |||
+ | This is the temperature below which the material will begin to take frost [[wear|damage]]. | ||
+ | |||
+ | ==Specific heat== | ||
+ | |||
+ | This determines how long it takes the material to heat up or cool down. A material with a high specific heat capacity will change temperature more slowly. | ||
+ | |||
+ | ==Fixed temperature== | ||
+ | |||
+ | A material's temperature can be forced to always be a certain value via the MAT_FIXED_TEMP [[material definition token]]. The only standard material which uses this is [[nether-cap]] wood, whose temperature is always at the melting point of water. If a material's temperature is fixed to between its cold damage point and its heat damage point, then items made from that material will never suffer cold/heat damage. This makes nether-caps [[fire-safe]] and [[magma-safe]] despite being a type of [[wood]]. | ||
+ | |||
+ | Due to the way fixed temperature is handled, giving a material a fixed temperature will not cause its actual temperature to change accordingly - instead, its temperature will simply be permanently locked at whatever it was previously. Removing a material's fixed temperature, however, will cause all items made of it to heat or cool until reaching equilibrium with their surroundings. | ||
+ | |||
+ | The fixed temperature of a [[container]] has no effect on its contents, so you can't freeze [[water]] by putting it into a [[bucket]] made from nether-cap. | ||
− | + | The fixed temperature of an inorganic material has no effect on unmined walls made from that material, though boulders '''will''' take on that temperature as they are produced via mining. | |
− | |||
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