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Difference between revisions of "v0.34 Talk:Obsidian"
UristDaVinci (talk | contribs) (Comment regarding obsidian sword bug and easy realistic fix.) |
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--[[User:UristDaVinci|UristDaVinci]] 05:28, 30 June 2012 (UTC) | --[[User:UristDaVinci|UristDaVinci]] 05:28, 30 June 2012 (UTC) | ||
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| + | == Surviving casting == | ||
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| + | I've never seen anything survive casting in obsidian. Has anyone seen this happen before? It appears to have migrated from v0.31, so it's possible that it's outdated. I might as well remove that sentence if nobody has seen it happen in v0.34. --{{User:Lethosor/sig}} 02:32, 2 March 2013 (UTC) | ||
Revision as of 02:32, 2 March 2013
Its very likely that the wood is used for both the handle and the blade, with the obsidian flaked in long pieces and set in the wooden blade. A weapon like this was used by the aztecs. – unsigned comment by Dianetics
- It has been known for years that rock swords are intended to be these; in Dwarf Fortress, though, it just treats the item as a sword made entirely of Obsidian because items cannot be made of multiple materials. Also, please sign your comments. --Quietust 12:40, 15 April 2012 (UTC)
There is a bug currently with obsidian swords here. I verifed that this bug still exists in 0.34.11 by adding IS_METAL to obsidian to permit the creation of obsidian swords in the arena. I also verified that adding glass-like SHEAR values to obsidian permits swords to cut up creatures rather than clubbing them.
I found a research thesis online in which the material properties of obsidian were tested. Note the biaxial strength (in this case, tensile stress in both directions) of 35 ± 6.7 MPa for black obsidian. This would be equivalent to [TENSILE_FRACTURE:35000]. More importantly, setting the shear values would permit effective weapon usage, i.e:
[SHEAR_YIELD:35000] [SHEAR_FRACTURE:35000] [SHEAR_STRAIN_AT_YIELD:114] shear modulus 30.7 GPa
For comparison, green glass is currently this in DF: [SHEAR_YIELD:33000] [SHEAR_FRACTURE:33000] [SHEAR_STRAIN_AT_YIELD:113]
--UristDaVinci 05:28, 30 June 2012 (UTC)
Surviving casting
I've never seen anything survive casting in obsidian. Has anyone seen this happen before? It appears to have migrated from v0.31, so it's possible that it's outdated. I might as well remove that sentence if nobody has seen it happen in v0.34. --Lethosor (talk) 02:32, 2 March 2013 (UTC)