Editing v0.31:Temperature

{{quality|Fine|08:00, 22 May 2010 (UTC)}}''For temperature as it relates to choosing an embarkation site, see [[DF2010:Climate|Climate]].''
<br />{{AV}}
==Temperature scale==
Dwarf Fortress uses its own temperature scale in most cases, often called "Degrees [[Urist]]" on this wiki.
So if you see something like [HOMEOTHERM:10067], don't be amazed.

[[Magma]]'s temperature is 12,000° Urist.

===Conversion===

[DF scale] = [FAHRENHEIT] + 9968

[DF scale] = [CELSIUS] * 9/5 + 10000

[DF scale] = [KELVIN] * 9/5 + 9508.33

[DF scale] = [RANKINE] + 9508.33

==Melting point==

This is the temperature at which an object will melt. Any material with a melting point over 12,000°U is {{L|magma-safe}}.

==Boiling point==

This is the temperature at which an object will evaporate.

==Ignition point==

This is the temperature at which an object will catch fire.

==Specific heat==

This determines how long it takes an object to heat up or cool down. An object with high specific heat will change temperature more slowly.
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@@ Line 1: / Line 1: @@
-{{quality|Fine|15:51 27 December 2011 (UTC)}}{{av}}
+{{quality|Fine|08:00, 22 May 2010 (UTC)}}''For temperature as it relates to choosing an embarkation site, see [[DF2010:Climate|Climate]].''
+<br />{{AV}}
-''For temperature as it relates to choosing an embarkation site, see [[Climate]].''
 ==Temperature scale==
-''Dwarf Fortress'' uses its own temperature scale in most cases, often called "Degrees [[Main:Urist|Urist]]" on this wiki.
+Dwarf Fortress uses its own temperature scale in most cases, often called "Degrees [[Urist]]" on this wiki.
 So if you see something like [HOMEOTHERM:10067], don't be amazed.
-For example, [[magma]]'s temperature is 12,000° Urist.
+[[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===
@@ Line 20: / Line 16: @@
 [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}}
-|- bgcolor="#ddd"
-! Significance
-! DF Scale
-! Fahrenheit
-! Celsius
-! Kelvin
-! Rankine
-|-
-| Boiling Point of Water
-| 10180
-| 212
-| 100
-| 373.15
-| 671.67
-|-
-|Human Body Temperature
-| 10066.6<sup>2</sup>
-| 98.6
-| 37.0
-| 310.15
-| 558.27
-|-
-| Freezing Point of Water
-| 10000
-| 32
-| 0
-| 273.15
-| 491.67
-|-
-| Absolute Zero
-| 9508.33<sup>2</sup>
-| -459.67
-| −273.15
-| 0
-| 0
-|-
-| DF Scale's Zero<sup>1</sup>
-| 0
-| -9968
-| -5555.555...
-| -5282.40555...
-| -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"
-|-
-! Event / location
-! 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 coal (max)
-| 11640 U
-|-
-| magma
-| 12000 U
-|-
-| [[titan]]/[[forgotten beast]] fire
-| 14000 U
-|-
-| [[dragon]] fire
-| 50000 U
-|}
 ==Melting point==
-This is the temperature at which the material will melt.
+This is the temperature at which an object will melt. Any material with a melting point over 12,000°U is {{L|magma-safe}}.
 ==Boiling point==
-This is the temperature at which the material will evaporate.
+This is the temperature at which an object will evaporate.
 ==Ignition point==
-This is the temperature at which the material will catch fire.
+This is the temperature at which an object 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.
+This determines how long it takes an object to heat up or cool down. An object with high specific heat will change temperature more slowly.
+<br /><br />
-==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]] does affect its contents, but you can't freeze [[water]] by putting it into a [[bucket]] made from nether-cap because water will not freeze until it cools ''below'' {{ct|10000}}.
-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.