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Difference between revisions of "Density"
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Density influences weight, and tests show that weight affects how much damage blunt-force [[weapon|weapons]] do. Additionally, lightweight edged weapons or attacking parts made of certain materials seem to have difficulty piercing tissue layers. Apparently, density in dwarf fortress is in kg/m<sup>3</sup>. Density also affects fall damage. DF simulates falling by shooting the ground at you, so denser floors do more damage. | Density influences weight, and tests show that weight affects how much damage blunt-force [[weapon|weapons]] do. Additionally, lightweight edged weapons or attacking parts made of certain materials seem to have difficulty piercing tissue layers. Apparently, density in dwarf fortress is in kg/m<sup>3</sup>. Density also affects fall damage. DF simulates falling by shooting the ground at you, so denser floors do more damage. | ||
== Density of some materials == | == Density of some materials == | ||
| + | |||
| + | Note that not all forms of items are the same size, and so are not comparable when considering [[weight]]. A [[stone]] (including raw ore) has a size of 10,000 cm<sup>3</sup> and a [[log]] of wood 5,000 cm<sup>3</sup>, while a [[bar]] of metal ''(or a block of stone or wood)'' have a size of only 600 cm<sup>3</sup>, a difference of ~16.67:1 for vs. metals, or ~8.33:1 for wood vs. metals. | ||
| + | |||
| + | <!-- TABLE NEEDS A NEW COLUMN TO REFLECT THIS. CURRENT DATA IS MISLEADING w/ REGARD TO WEIGHT IN PRACTICAL APPLICATIONS.--> | ||
{| class="wikitable sortable" cellspacing="0" border="1" cellpadding="5" | {| class="wikitable sortable" cellspacing="0" border="1" cellpadding="5" | ||
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|[[Tunnel tube]]||Wood||500||Least dense [[underground]] wood, found only in caverns | |[[Tunnel tube]]||Wood||500||Least dense [[underground]] wood, found only in caverns | ||
|- | |- | ||
| − | |"typical" [[wood]]||Wood||600|| ''There are about 4 dozen varieties of wood at 600, about a dozen (unlisted here) that weight less, and a half- | + | |"typical" [[wood]]||Wood||600|| ''There are about 4 dozen varieties of wood at 600, about a dozen (unlisted here) that weight less,<br>and a half-dozen (sim) that weigh more. See [[Wood]] for a full list and discussion.'' |
|- | |- | ||
|[[Oak]]||Wood||700||Densest "common" wood, temperate/dry | |[[Oak]]||Wood||700||Densest "common" wood, temperate/dry | ||
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|[[Lay pewter]]||Metal||7280 | |[[Lay pewter]]||Metal||7280 | ||
|- | |- | ||
| − | |[[Galena]]||Metal||7500| Ore of [[lead]] | + | |[[Galena]]||Metal||7500|| Ore of [[lead]] |
|- | |- | ||
|[[Pitchblende]]||Stone||7600||Most dense "magma-safe" stone | |[[Pitchblende]]||Stone||7600||Most dense "magma-safe" stone | ||
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|[[Slade]]||Stone||200000 | |[[Slade]]||Stone||200000 | ||
||Densest stone, difficult to mine | ||Densest stone, difficult to mine | ||
| + | |- | ||
{{Category|Physics}} | {{Category|Physics}} | ||
Revision as of 00:05, 6 May 2017
v50.14 · v0.47.05 This article is about the current version of DF.Note that some content may still need to be updated. |
| Material properties |
| Defined: Value • Color • Density • Strain at yield • Temperature values |
| Derived: Magma safety • Fire safety |
| Fluids: Depth • Flow • Pressure |
Density is a material property that, along with the volume of the object, affects the weight of an object made from the material.
Density influences weight, and tests show that weight affects how much damage blunt-force weapons do. Additionally, lightweight edged weapons or attacking parts made of certain materials seem to have difficulty piercing tissue layers. Apparently, density in dwarf fortress is in kg/m3. Density also affects fall damage. DF simulates falling by shooting the ground at you, so denser floors do more damage.
Density of some materials
Note that not all forms of items are the same size, and so are not comparable when considering weight. A stone (including raw ore) has a size of 10,000 cm3 and a log of wood 5,000 cm3, while a bar of metal (or a block of stone or wood) have a size of only 600 cm3, a difference of ~16.67:1 for vs. metals, or ~8.33:1 for wood vs. metals.
| Name | Type | Density | Notes |
|---|---|---|---|
| Feather tree | Wood | 100 | Least dense wood, found only in dry, good biomes |
| Candlenut | Wood | 140 | Second least dense wood, found only in dry, tropical biomes |
| Adamantine | Metal | 200 | Least dense metal |
| Raw adamantine | Stone | 200 | Least dense stone |
| Kapok | Wood | 260 | Third dense wood, found only in dry, tropical biomes |
| Willow | Wood | 390 | Fourth lightest, found in "wet" biomes, most widespread of "light" wood |
| Bone | Organics | 500 | |
| Leather | Organics | 500 | |
| Silk | Organics | 500 | |
| Yarn | Organics | 500 | |
| Tunnel tube | Wood | 500 | Least dense underground wood, found only in caverns |
| "typical" wood | Wood | 600 | There are about 4 dozen varieties of wood at 600, about a dozen (unlisted here) that weight less, and a half-dozen (sim) that weigh more. See Wood for a full list and discussion. |
| Oak | Wood | 700 | Densest "common" wood, temperate/dry |
| Mangrove | Wood | 830 | Densest "normal" wood, found only in wet swamp biomes |
| Divine metal | Metal | 1000 | Second least dense metal |
| Glumprong | Wood | 1200 | Densest above-ground wood (by far), found only in dry, evil biomes |
| Blood thorn | Wood | 1250 | Densest wood, underground, found only in caverns |
| Lignite | Stone | 1250 | |
| Jet | Stone | 1320 | Least dense non-economic stone |
| Earthenware | Ceramic | 1360 | |
| Plant cloth | Organics | 1520 | |
| Stoneware | Ceramic | 2000 | |
| Saltpeter | Stone | 2105 | |
| Gypsum relatives | Stone | 2300 | |
| Gypsum | Stone | 2320 | |
| Porcelain | Ceramic | 2403 | |
| Glass | Gem | 2600 | |
| (General) stone | Stone | 2670 | |
| Ordinary gem | Gem | 2670 | |
| Aluminum | Metal | 2700 | Least dense "normal" metal |
| Limestone | Stone | 2710 | |
| Marble | Stone | 2780 | |
| Dolomite | Stone | 2850 | Least dense "magma-safe" stone |
| Calcite | Stone | 2930 | |
| Diamond (any) | Gem | 3520 | |
| Cobaltite | Stone | 6295 | |
| Lay pewter | Metal | 7280 | |
| Galena | Metal | 7500 | Ore of lead |
| Pitchblende | Stone | 7600 | Most dense "magma-safe" stone |
| Iron | Metal | 7850 | |
| Steel | Metal | 7850 | |
| Cinnabar | Stone | 8100 | Densest non-economic stone |
| Bronze | Metal | 8250 | |
| Copper | Metal | 8930 | |
| Silver | Metal | 10490 | |
| Lead | Metal | 11340 | |
| Gold | Metal | 19320 | |
| Platinum | Metal | 21400 | Densest metal |
| Native platinum | Stone | 21400 | Densest economic stone (and ore) |
| Slade | Stone | 200000 | Densest stone, difficult to mine |