Clarify shielding information (#318)

* Clarify shielding information

Clarify notes about shielding values and description of Lead
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Jacob Gustafson 2017-03-17 16:29:37 -04:00 committed by Vanessa Ezekowitz
parent 7d76ff8d38
commit f420aa4d37

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@ -766,14 +766,12 @@ source than by actual attenuation. Dirt halves radiation in 2.4 m,
and stone in 1.7 m. When a shield must be deliberately constructed,
the preferred materials are metals, the denser the better. Iron and
steel halve radiation in 1.1 m, copper in 1.0 m, and silver in 0.95 m.
Lead would halve in 0.69 m if it were in the game, but it's not, which
poses a bit of a problem due to the drawbacks of the three materials in
the game that are better shielding than silver. Gold halves radiation
Lead would halve in 0.69 m (its in-game shielding value is 80). Gold halves radiation
in 0.53 m (factor of 3.7 per meter), but is a bit scarce to use for
this purpose. Uranium halves radiation in 0.31 m (factor of 9.4 per
meter), but is itself radioactive. The very best shielding in the game
is nyancat material (nyancats and their rainbow blocks), which halves
radiation in 0.22 m (factor of 24 per meter), but is extremely scarce.
radiation in 0.22 m (factor of 24 per meter), but is extremely scarce. See [technic/technic/radiation.lua](https://github.com/minetest-technic/technic/blob/master/technic/radiation.lua) for the in-game shielding values, which are different from real-life values.
If the theoretical radiation damage from a particular source is
sufficiently small, due to distance and shielding, then no damage at all