From da95be53ec5703e808233d7b45fc42fb500863dd Mon Sep 17 00:00:00 2001
From: coil <51716565+coil0@users.noreply.github.com>
Date: Mon, 30 Dec 2019 21:02:01 +0100
Subject: [PATCH] Fix radiation protection when armor group is not set (#509)
---
technic/items.lua | 92 +++++++++++++++++++++++++++++++++++-----------
1 files changed, 70 insertions(+), 22 deletions(-)
diff --git a/technic/items.lua b/technic/items.lua
index 1fdb018..cf57229 100644
--- a/technic/items.lua
+++ b/technic/items.lua
@@ -11,11 +11,6 @@
inventory_image = "technic_doped_silicon_wafer.png",
})
-minetest.register_craftitem("technic:enriched_uranium", {
- description = S("Enriched Uranium"),
- inventory_image = "technic_enriched_uranium.png",
-})
-
minetest.register_craftitem("technic:uranium_fuel", {
description = S("Uranium Fuel"),
inventory_image = "technic_uranium_fuel.png",
@@ -40,7 +35,7 @@
fleshy = {times={}, uses=10000, maxlevel=0}
}
}
-})
+})
minetest.register_tool("technic:green_energy_crystal", {
description = S("Green Energy Crystal"),
@@ -56,7 +51,7 @@
fleshy = {times={}, uses=10000, maxlevel=0}
}
}
-})
+})
minetest.register_tool("technic:red_energy_crystal", {
description = S("Red Energy Crystal"),
@@ -72,12 +67,6 @@
fleshy = {times={}, uses=10000, maxlevel=0}
}
}
-})
-
-
-minetest.register_craftitem("technic:fine_copper_wire", {
- description = S("Fine Copper Wire"),
- inventory_image = "technic_fine_copper_wire.png",
})
minetest.register_craftitem("technic:copper_coil", {
@@ -85,20 +74,11 @@
inventory_image = "technic_copper_coil.png",
})
-minetest.register_craftitem("technic:motor", {
- description = S("Electric Motor"),
- inventory_image = "technic_motor.png",
-})
-
minetest.register_craftitem("technic:lv_transformer", {
description = S("Low Voltage Transformer"),
inventory_image = "technic_lv_transformer.png",
})
-minetest.register_craftitem("technic:lv_transformer", {
- description = S("Low Voltage Transformer"),
- inventory_image = "technic_lv_transformer.png",
-})
minetest.register_craftitem("technic:mv_transformer", {
description = S("Medium Voltage Transformer"),
inventory_image = "technic_mv_transformer.png",
@@ -153,3 +133,71 @@
tiles = {"technic_machine_casing.png"},
sounds = default.node_sound_stone_defaults(),
})
+
+for p = 0, 35 do
+ local nici = (p ~= 0 and p ~= 7 and p ~= 35) and 1 or nil
+ local psuffix = p == 7 and "" or p
+ local ingot = "technic:uranium"..psuffix.."_ingot"
+ local block = "technic:uranium"..psuffix.."_block"
+ local ov = p == 7 and minetest.override_item or nil;
+ (ov or minetest.register_craftitem)(ingot, {
+ description = string.format(S("%.1f%%-Fissile Uranium Ingot"), p/10),
+ inventory_image = "technic_uranium_ingot.png",
+ groups = {uranium_ingot=1, not_in_creative_inventory=nici},
+ });
+ -- Note on radioactivity of blocks:
+ -- Source: <http://www.wise-uranium.org/rup.html>
+ -- The baseline radioactivity of an isotope is not especially
+ -- correlated with whether it's fissile (i.e., suitable as
+ -- reactor fuel). Natural uranium consists mainly of fissile
+ -- U-235 and non-fissile U-238, and both U-235 and U-238 are
+ -- significantly radioactive. U-235's massic activity is
+ -- about 80.0 MBq/kg, and U-238's is about 12.4 MBq/kg, which
+ -- superficially suggests that 3.5%-fissile uranium should have
+ -- only 1.19 times the activity of fully-depleted uranium.
+ -- But a third isotope affects the result hugely: U-234 has
+ -- massic activity of 231 GBq/kg. Natural uranium has massic
+ -- composition of 99.2837% U-238, 0.711% U-235, and 0.0053% U-234,
+ -- so its activity comes roughly 49% each from U-234 and U-238
+ -- and only 2% from U-235. During enrichment via centrifuge,
+ -- the U-234 fraction is concentrated along with the U-235, with
+ -- the U-234:U-235 ratio remaining close to its original value.
+ -- (Actually the U-234 gets separated from U-238 slightly more
+ -- than the U-235 is, so the U-234:U-235 ratio is slightly
+ -- higher in enriched uranium.) A typical massic composition
+ -- for 3.5%-fissile uranium is 96.47116% U-238, 3.5% U-235, and
+ -- 0.02884% U-234. This gives 3.5%-fissile uranium about 6.55
+ -- times the activity of fully-depleted uranium. The values we
+ -- compute here for the "radioactive" group value are based on
+ -- linear interpolation of activity along that scale, rooted at
+ -- a natural (0.7%-fissile) uranium block having the activity of
+ -- 9 uranium ore blocks (due to 9 ingots per block). The group
+ -- value is proportional to the square root of the activity, and
+ -- uranium ore has radioactive=1. This yields radioactive=1.0
+ -- for a fully-depleted uranium block and radioactive=2.6 for
+ -- a 3.5%-fissile uranium block.
+ local radioactivity = math.floor(math.sqrt((1+5.55*p/35) * 18 / (1+5.55*7/35)) + 0.5);
+ (ov or minetest.register_node)(block, {
+ description = string.format(S("%.1f%%-Fissile Uranium Block"), p/10),
+ tiles = {"technic_uranium_block.png"},
+ is_ground_content = true,
+ groups = {uranium_block=1, not_in_creative_inventory=nici,
+ cracky=1, level=2, radioactive=radioactivity},
+ sounds = default.node_sound_stone_defaults(),
+ });
+ if not ov then
+ minetest.register_craft({
+ output = block,
+ recipe = {
+ {ingot, ingot, ingot},
+ {ingot, ingot, ingot},
+ {ingot, ingot, ingot},
+ },
+ })
+ minetest.register_craft({
+ output = ingot.." 9",
+ recipe = {{block}},
+ })
+ end
+end
+
--
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