-- The enriched uranium rod driven EU generator.
|
-- A very large and advanced machine providing vast amounts of power.
|
-- Very efficient but also expensive to run as it needs uranium. (10000EU 86400 ticks (one week))
|
-- Provides HV EUs that can be down converted as needed.
|
--
|
-- The nuclear reactor core needs water and a protective shield to work.
|
-- This is checked now and then and if the machine is tampered with... BOOM!
|
|
local burn_ticks = 7 * 24 * 60 * 60 -- (seconds).
|
local power_supply = 100000 -- EUs
|
local fuel_type = "technic:uranium_fuel" -- The reactor burns this stuff
|
|
local S = technic.getter
|
|
if not vector.length_square then
|
vector.length_square = function (v)
|
return v.x*v.x + v.y*v.y + v.z*v.z
|
end
|
end
|
|
-- FIXME: recipe must make more sense like a rod recepticle, steam chamber, HV generator?
|
minetest.register_craft({
|
output = 'technic:hv_nuclear_reactor_core',
|
recipe = {
|
{'technic:carbon_plate', 'default:obsidian_glass', 'technic:carbon_plate'},
|
{'technic:composite_plate', 'technic:machine_casing', 'technic:composite_plate'},
|
{'technic:stainless_steel_ingot', 'technic:hv_cable0', 'technic:stainless_steel_ingot'},
|
}
|
})
|
|
local generator_formspec =
|
"invsize[8,9;]"..
|
"label[0,0;"..S("Nuclear Reactor Rod Compartment").."]"..
|
"list[current_name;src;2,1;3,2;]"..
|
"list[current_player;main;0,5;8,4;]"
|
|
-- "Boxy sphere"
|
local nodebox = {
|
{ -0.353, -0.353, -0.353, 0.353, 0.353, 0.353 }, -- Box
|
{ -0.495, -0.064, -0.064, 0.495, 0.064, 0.064 }, -- Circle +-x
|
{ -0.483, -0.128, -0.128, 0.483, 0.128, 0.128 },
|
{ -0.462, -0.191, -0.191, 0.462, 0.191, 0.191 },
|
{ -0.433, -0.249, -0.249, 0.433, 0.249, 0.249 },
|
{ -0.397, -0.303, -0.303, 0.397, 0.303, 0.303 },
|
{ -0.305, -0.396, -0.305, 0.305, 0.396, 0.305 }, -- Circle +-y
|
{ -0.250, -0.432, -0.250, 0.250, 0.432, 0.250 },
|
{ -0.191, -0.461, -0.191, 0.191, 0.461, 0.191 },
|
{ -0.130, -0.482, -0.130, 0.130, 0.482, 0.130 },
|
{ -0.066, -0.495, -0.066, 0.066, 0.495, 0.066 },
|
{ -0.064, -0.064, -0.495, 0.064, 0.064, 0.495 }, -- Circle +-z
|
{ -0.128, -0.128, -0.483, 0.128, 0.128, 0.483 },
|
{ -0.191, -0.191, -0.462, 0.191, 0.191, 0.462 },
|
{ -0.249, -0.249, -0.433, 0.249, 0.249, 0.433 },
|
{ -0.303, -0.303, -0.397, 0.303, 0.303, 0.397 },
|
}
|
|
local reactor_siren = {}
|
local function siren_set_state(pos, newstate)
|
local hpos = minetest.hash_node_position(pos)
|
local siren = reactor_siren[hpos]
|
if not siren then
|
if newstate == "off" then return end
|
siren = {state="off"}
|
reactor_siren[hpos] = siren
|
end
|
if newstate == "danger" and siren.state ~= "danger" then
|
if siren.handle then minetest.sound_stop(siren.handle) end
|
siren.handle = minetest.sound_play("technic_hv_nuclear_reactor_siren_danger_loop", {pos=pos, gain=1.5, loop=true, max_hear_distance=48})
|
siren.state = "danger"
|
elseif newstate == "clear" then
|
if siren.handle then minetest.sound_stop(siren.handle) end
|
local clear_handle = minetest.sound_play("technic_hv_nuclear_reactor_siren_clear", {pos=pos, gain=1.5, loop=false, max_hear_distance=48})
|
siren.handle = clear_handle
|
siren.state = "clear"
|
minetest.after(10, function ()
|
if siren.handle == clear_handle then
|
minetest.sound_stop(clear_handle)
|
if reactor_siren[hpos] == siren then
|
reactor_siren[hpos] = nil
|
end
|
end
|
end)
|
elseif newstate == "off" and siren.state ~= "off" then
|
if siren.handle then minetest.sound_stop(siren.handle) end
|
siren.handle = nil
|
reactor_siren[hpos] = nil
|
end
|
end
|
local function siren_danger(pos, meta)
|
meta:set_int("siren", 1)
|
siren_set_state(pos, "danger")
|
end
|
local function siren_clear(pos, meta)
|
if meta:get_int("siren") ~= 0 then
|
siren_set_state(pos, "clear")
|
meta:set_int("siren", 0)
|
end
|
end
|
|
-- The standard reactor structure consists of a 9x9x9 cube. A cross
|
-- section through the middle:
|
--
|
-- CCCC CCCC
|
-- CBBB BBBC
|
-- CBSS SSBC
|
-- CBSWWWSBC
|
-- CBSW#WSBC
|
-- CBSW|WSBC
|
-- CBSS|SSBC
|
-- CBBB|BBBC
|
-- CCCC|CCCC
|
-- C = Concrete, B = Blast-resistant concrete, S = Stainless Steel,
|
-- W = water node, # = reactor core, | = HV cable
|
--
|
-- The man-hole and the HV cable are only in the middle, and the man-hole
|
-- is optional.
|
--
|
-- For the reactor to operate and not melt down, it insists on the inner
|
-- 7x7x7 portion (from the core out to the blast-resistant concrete)
|
-- being intact. Intactness only depends on the number of nodes of the
|
-- right type in each layer. The water layer must have water in all but
|
-- at most one node; the steel and blast-resistant concrete layers must
|
-- have the right material in all but at most two nodes. The permitted
|
-- gaps are meant for the cable and man-hole, but can actually be anywhere
|
-- and contain anything. For the reactor to be useful, a cable must
|
-- connect to the core, but it can go in any direction.
|
--
|
-- The outer concrete layer of the standard structure is not required
|
-- for the reactor to operate. It is noted here because it used to
|
-- be mandatory, and for historical reasons (that it predates the
|
-- implementation of radiation) it needs to continue being adequate
|
-- shielding of legacy reactors. If it ever ceases to be adequate
|
-- shielding for new reactors, legacy ones should be grandfathered.
|
local reactor_structure_badness = function(pos)
|
local vm = VoxelManip()
|
local pos1 = vector.subtract(pos, 3)
|
local pos2 = vector.add(pos, 3)
|
local MinEdge, MaxEdge = vm:read_from_map(pos1, pos2)
|
local data = vm:get_data()
|
local area = VoxelArea:new({MinEdge=MinEdge, MaxEdge=MaxEdge})
|
|
local c_blast_concrete = minetest.get_content_id("technic:blast_resistant_concrete")
|
local c_stainless_steel = minetest.get_content_id("technic:stainless_steel_block")
|
local c_water_source = minetest.get_content_id("default:water_source")
|
local c_water_flowing = minetest.get_content_id("default:water_flowing")
|
|
local blastlayer, steellayer, waterlayer = 0, 0, 0
|
|
for z = pos1.z, pos2.z do
|
for y = pos1.y, pos2.y do
|
for x = pos1.x, pos2.x do
|
local cid = data[area:index(x, y, z)]
|
if x == pos1.x or x == pos2.x or
|
y == pos1.y or y == pos2.y or
|
z == pos1.z or z == pos2.z then
|
if cid == c_blast_concrete then
|
blastlayer = blastlayer + 1
|
end
|
elseif x == pos1.x+1 or x == pos2.x-1 or
|
y == pos1.y+1 or y == pos2.y-1 or
|
z == pos1.z+1 or z == pos2.z-1 then
|
if cid == c_stainless_steel then
|
steellayer = steellayer + 1
|
end
|
elseif x == pos1.x+2 or x == pos2.x-2 or
|
y == pos1.y+2 or y == pos2.y-2 or
|
z == pos1.z+2 or z == pos2.z-2 then
|
if cid == c_water_source or cid == c_water_flowing then
|
waterlayer = waterlayer + 1
|
end
|
end
|
end
|
end
|
end
|
if waterlayer > 25 then waterlayer = 25 end
|
if steellayer > 96 then steellayer = 96 end
|
if blastlayer > 216 then blastlayer = 216 end
|
return (25 - waterlayer) + (96 - steellayer) + (216 - blastlayer)
|
end
|
|
local function meltdown_reactor(pos)
|
print("A reactor melted down at "..minetest.pos_to_string(pos))
|
minetest.set_node(pos, {name="technic:corium_source"})
|
end
|
|
minetest.register_abm({
|
nodenames = {"technic:hv_nuclear_reactor_core_active"},
|
interval = 1,
|
chance = 1,
|
action = function (pos, node)
|
local meta = minetest.get_meta(pos)
|
local badness = reactor_structure_badness(pos)
|
local accum_badness = meta:get_int("structure_accumulated_badness")
|
if badness == 0 then
|
if accum_badness ~= 0 then
|
meta:set_int("structure_accumulated_badness", accum_badness - 1)
|
siren_clear(pos, meta)
|
end
|
else
|
siren_danger(pos, meta)
|
accum_badness = accum_badness + badness
|
if accum_badness >= 100 then
|
meltdown_reactor(pos)
|
else
|
meta:set_int("structure_accumulated_badness", accum_badness)
|
end
|
end
|
end,
|
})
|
|
local run = function(pos, node)
|
local meta = minetest.get_meta(pos)
|
local machine_name = S("Nuclear %s Generator Core"):format("HV")
|
local burn_time = meta:get_int("burn_time") or 0
|
|
if burn_time >= burn_ticks or burn_time == 0 then
|
local inv = meta:get_inventory()
|
if not inv:is_empty("src") then
|
local srclist = inv:get_list("src")
|
local correct_fuel_count = 0
|
for _, srcstack in pairs(srclist) do
|
if srcstack then
|
if srcstack:get_name() == fuel_type then
|
correct_fuel_count = correct_fuel_count + 1
|
end
|
end
|
end
|
-- Check that the reactor is complete as well
|
-- as the correct number of correct fuel
|
if correct_fuel_count == 6 and
|
reactor_structure_badness(pos) == 0 then
|
meta:set_int("burn_time", 1)
|
technic.swap_node(pos, "technic:hv_nuclear_reactor_core_active")
|
meta:set_int("HV_EU_supply", power_supply)
|
for idx, srcstack in pairs(srclist) do
|
srcstack:take_item()
|
inv:set_stack("src", idx, srcstack)
|
end
|
return
|
end
|
end
|
meta:set_int("HV_EU_supply", 0)
|
meta:set_int("burn_time", 0)
|
meta:set_string("infotext", S("%s Idle"):format(machine_name))
|
technic.swap_node(pos, "technic:hv_nuclear_reactor_core")
|
meta:set_int("structure_accumulated_badness", 0)
|
siren_clear(pos, meta)
|
elseif burn_time > 0 then
|
burn_time = burn_time + 1
|
meta:set_int("burn_time", burn_time)
|
local percent = math.floor(burn_time / burn_ticks * 100)
|
meta:set_string("infotext", machine_name.." ("..percent.."%)")
|
meta:set_int("HV_EU_supply", power_supply)
|
end
|
end
|
|
minetest.register_node("technic:hv_nuclear_reactor_core", {
|
description = S("Nuclear %s Generator Core"):format("HV"),
|
tiles = {"technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png",
|
"technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png",
|
"technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png"},
|
groups = {cracky=1, technic_machine=1},
|
legacy_facedir_simple = true,
|
sounds = default.node_sound_wood_defaults(),
|
drawtype="nodebox",
|
paramtype = "light",
|
stack_max = 1,
|
node_box = {
|
type = "fixed",
|
fixed = nodebox
|
},
|
on_construct = function(pos)
|
local meta = minetest.get_meta(pos)
|
meta:set_string("infotext", S("Nuclear %s Generator Core"):format("HV"))
|
meta:set_int("HV_EU_supply", 0)
|
-- Signal to the switching station that this device burns some
|
-- sort of fuel and needs special handling
|
meta:set_int("HV_EU_from_fuel", 1)
|
meta:set_int("burn_time", 0)
|
meta:set_string("formspec", generator_formspec)
|
local inv = meta:get_inventory()
|
inv:set_size("src", 6)
|
end,
|
can_dig = technic.machine_can_dig,
|
on_destruct = function(pos) siren_set_state(pos, "off") end,
|
allow_metadata_inventory_put = technic.machine_inventory_put,
|
allow_metadata_inventory_take = technic.machine_inventory_take,
|
allow_metadata_inventory_move = technic.machine_inventory_move,
|
technic_run = run,
|
})
|
|
minetest.register_node("technic:hv_nuclear_reactor_core_active", {
|
tiles = {"technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png",
|
"technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png",
|
"technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png"},
|
groups = {cracky=1, technic_machine=1, radioactive=7, not_in_creative_inventory=1},
|
legacy_facedir_simple = true,
|
sounds = default.node_sound_wood_defaults(),
|
drop="technic:hv_nuclear_reactor_core",
|
drawtype="nodebox",
|
light_source = 15,
|
paramtype = "light",
|
node_box = {
|
type = "fixed",
|
fixed = nodebox
|
},
|
can_dig = technic.machine_can_dig,
|
after_dig_node = meltdown_reactor,
|
on_destruct = function(pos) siren_set_state(pos, "off") end,
|
allow_metadata_inventory_put = technic.machine_inventory_put,
|
allow_metadata_inventory_take = technic.machine_inventory_take,
|
allow_metadata_inventory_move = technic.machine_inventory_move,
|
technic_run = run,
|
technic_on_disable = function(pos, node)
|
local timer = minetest.get_node_timer(pos)
|
timer:start(1)
|
end,
|
on_timer = function(pos, node)
|
local meta = minetest.get_meta(pos)
|
|
-- Connected back?
|
if meta:get_int("HV_EU_timeout") > 0 then return end
|
|
local burn_time = meta:get_int("burn_time") or 0
|
|
if burn_time >= burn_ticks or burn_time == 0 then
|
meta:set_int("HV_EU_supply", 0)
|
meta:set_int("burn_time", 0)
|
technic.swap_node(pos, "technic:hv_nuclear_reactor_core")
|
meta:set_int("structure_accumulated_badness", 0)
|
siren_clear(pos, meta)
|
return
|
end
|
|
meta:set_int("burn_time", burn_time + 1)
|
local timer = minetest.get_node_timer(pos)
|
timer:start(1)
|
end,
|
})
|
|
technic.register_machine("HV", "technic:hv_nuclear_reactor_core", technic.producer)
|
technic.register_machine("HV", "technic:hv_nuclear_reactor_core_active", technic.producer)
|
|
-- radioactivity
|
|
-- Radiation resistance represents the extent to which a material
|
-- attenuates radiation passing through it; i.e., how good a radiation
|
-- shield it is. This is identified per node type. For materials that
|
-- exist in real life, the radiation resistance value that this system
|
-- uses for a node type consisting of a solid cube of that material is the
|
-- (approximate) number of halvings of ionising radiation that is achieved
|
-- by a metre of the material in real life. This is approximately
|
-- proportional to density, which provides a good way to estimate it.
|
-- Homogeneous mixtures of materials have radiation resistance computed
|
-- by a simple weighted mean. Note that the amount of attenuation that
|
-- a material achieves in-game is not required to be (and is not) the
|
-- same as the attenuation achieved in real life.
|
--
|
-- Radiation resistance for a node type may be specified in the node
|
-- definition, under the key "radiation_resistance". As an interim
|
-- measure, until node definitions widely include this, this code
|
-- knows a bunch of values for particular node types in several mods,
|
-- and values for groups of node types. The node definition takes
|
-- precedence if it specifies a value. Nodes for which no value at
|
-- all is known are taken to provide no radiation resistance at all;
|
-- this is appropriate for the majority of node types. Only node types
|
-- consisting of a fairly homogeneous mass of material should report
|
-- non-zero radiation resistance; anything with non-uniform geometry
|
-- or complex internal structure should show no radiation resistance.
|
-- Fractional resistance values are permitted; two significant figures
|
-- is the recommended precision.
|
local default_radiation_resistance_per_node = {
|
["default:brick"] = 13,
|
["default:bronzeblock"] = 45,
|
["default:clay"] = 15,
|
["default:coalblock"] = 9.6,
|
["default:cobble"] = 15,
|
["default:copperblock"] = 46,
|
["default:desert_cobble"] = 15,
|
["default:desert_sand"] = 10,
|
["default:desert_stone"] = 17,
|
["default:desert_stonebrick"] = 17,
|
["default:diamondblock"] = 24,
|
["default:dirt"] = 8.2,
|
["default:dirt_with_grass"] = 8.2,
|
["default:dirt_with_grass_footsteps"] = 8.2,
|
["default:dirt_with_snow"] = 8.2,
|
["default:glass"] = 17,
|
["default:goldblock"] = 170,
|
["default:gravel"] = 10,
|
["default:ice"] = 5.6,
|
["default:lava_flowing"] = 8.5,
|
["default:lava_source"] = 17,
|
["default:mese"] = 21,
|
["default:mossycobble"] = 15,
|
["default:nyancat"] = 1000,
|
["default:nyancat_rainbow"] = 1000,
|
["default:obsidian"] = 18,
|
["default:obsidian_glass"] = 18,
|
["default:sand"] = 10,
|
["default:sandstone"] = 15,
|
["default:sandstonebrick"] = 15,
|
["default:snowblock"] = 1.7,
|
["default:steelblock"] = 40,
|
["default:stone"] = 17,
|
["default:stone_with_coal"] = 16,
|
["default:stone_with_copper"] = 20,
|
["default:stone_with_diamond"] = 18,
|
["default:stone_with_gold"] = 34,
|
["default:stone_with_iron"] = 20,
|
["default:stone_with_mese"] = 17,
|
["default:stonebrick"] = 17,
|
["default:water_flowing"] = 2.8,
|
["default:water_source"] = 5.6,
|
["farming:desert_sand_soil"] = 10,
|
["farming:desert_sand_soil_wet"] = 10,
|
["farming:soil"] = 8.2,
|
["farming:soil_wet"] = 8.2,
|
["glooptest:akalin_crystal_glass"] = 21,
|
["glooptest:akalinblock"] = 40,
|
["glooptest:alatro_crystal_glass"] = 21,
|
["glooptest:alatroblock"] = 40,
|
["glooptest:amethystblock"] = 18,
|
["glooptest:arol_crystal_glass"] = 21,
|
["glooptest:crystal_glass"] = 21,
|
["glooptest:emeraldblock"] = 19,
|
["glooptest:heavy_crystal_glass"] = 21,
|
["glooptest:mineral_akalin"] = 20,
|
["glooptest:mineral_alatro"] = 20,
|
["glooptest:mineral_amethyst"] = 17,
|
["glooptest:mineral_arol"] = 20,
|
["glooptest:mineral_desert_coal"] = 16,
|
["glooptest:mineral_desert_iron"] = 20,
|
["glooptest:mineral_emerald"] = 17,
|
["glooptest:mineral_kalite"] = 20,
|
["glooptest:mineral_ruby"] = 18,
|
["glooptest:mineral_sapphire"] = 18,
|
["glooptest:mineral_talinite"] = 20,
|
["glooptest:mineral_topaz"] = 18,
|
["glooptest:reinforced_crystal_glass"] = 21,
|
["glooptest:rubyblock"] = 27,
|
["glooptest:sapphireblock"] = 27,
|
["glooptest:talinite_crystal_glass"] = 21,
|
["glooptest:taliniteblock"] = 40,
|
["glooptest:topazblock"] = 24,
|
["mesecons_extrawires:mese_powered"] = 21,
|
["moreblocks:cactus_brick"] = 13,
|
["moreblocks:cactus_checker"] = 8.5,
|
["moreblocks:circle_stone_bricks"] = 17,
|
["moreblocks:clean_glass"] = 17,
|
["moreblocks:coal_checker"] = 9.0,
|
["moreblocks:coal_glass"] = 17,
|
["moreblocks:coal_stone"] = 17,
|
["moreblocks:coal_stone_bricks"] = 17,
|
["moreblocks:glow_glass"] = 17,
|
["moreblocks:grey_bricks"] = 15,
|
["moreblocks:iron_checker"] = 11,
|
["moreblocks:iron_glass"] = 17,
|
["moreblocks:iron_stone"] = 17,
|
["moreblocks:iron_stone_bricks"] = 17,
|
["moreblocks:plankstone"] = 9.3,
|
["moreblocks:split_stone_tile"] = 15,
|
["moreblocks:split_stone_tile_alt"] = 15,
|
["moreblocks:stone_tile"] = 15,
|
["moreblocks:super_glow_glass"] = 17,
|
["moreblocks:tar"] = 7.0,
|
["moreblocks:wood_tile"] = 1.7,
|
["moreblocks:wood_tile_center"] = 1.7,
|
["moreblocks:wood_tile_down"] = 1.7,
|
["moreblocks:wood_tile_flipped"] = 1.7,
|
["moreblocks:wood_tile_full"] = 1.7,
|
["moreblocks:wood_tile_left"] = 1.7,
|
["moreblocks:wood_tile_right"] = 1.7,
|
["moreblocks:wood_tile_up"] = 1.7,
|
["moreores:mineral_mithril"] = 18,
|
["moreores:mineral_silver"] = 21,
|
["moreores:mineral_tin"] = 19,
|
["moreores:mithril_block"] = 26,
|
["moreores:silver_block"] = 53,
|
["moreores:tin_block"] = 37,
|
["snow:snow_brick"] = 2.8,
|
["technic:brass_block"] = 43,
|
["technic:carbon_steel_block"] = 40,
|
["technic:cast_iron_block"] = 40,
|
["technic:chernobylite_block"] = 40,
|
["technic:chromium_block"] = 37,
|
["technic:corium_flowing"] = 40,
|
["technic:corium_source"] = 80,
|
["technic:granite"] = 18,
|
["technic:marble"] = 18,
|
["technic:marble_bricks"] = 18,
|
["technic:mineral_chromium"] = 19,
|
["technic:mineral_uranium"] = 71,
|
["technic:mineral_zinc"] = 19,
|
["technic:stainless_steel_block"] = 40,
|
["technic:zinc_block"] = 36,
|
["tnt:tnt"] = 11,
|
["tnt:tnt_burning"] = 11,
|
}
|
local default_radiation_resistance_per_group = {
|
concrete = 16,
|
tree = 3.4,
|
uranium_block = 500,
|
wood = 1.7,
|
}
|
local cache_radiation_resistance = {}
|
local function node_radiation_resistance(nodename)
|
local eff = cache_radiation_resistance[nodename]
|
if eff then return eff end
|
local def = minetest.registered_nodes[nodename] or {groups={}}
|
eff = def.radiation_resistance or default_radiation_resistance_per_node[nodename]
|
if not eff then
|
for g, v in pairs(def.groups) do
|
if v > 0 and default_radiation_resistance_per_group[g] then
|
eff = default_radiation_resistance_per_group[g]
|
break
|
end
|
end
|
end
|
if not eff then eff = 0 end
|
cache_radiation_resistance[nodename] = eff
|
return eff
|
end
|
|
-- Radioactive nodes cause damage to nearby players. The damage
|
-- effect depends on the intrinsic strength of the radiation source,
|
-- the distance between the source and the player, and the shielding
|
-- effect of the intervening material. These determine a rate of damage;
|
-- total damage caused is the integral of this over time.
|
--
|
-- In the absence of effective shielding, for a specific source the
|
-- damage rate varies realistically in inverse proportion to the square
|
-- of the distance. (Distance is measured to the player's abdomen,
|
-- not to the nominal player position which corresponds to the foot.)
|
-- However, if the player is inside a non-walkable (liquid or gaseous)
|
-- radioactive node, the nominal distance could go to zero, yielding
|
-- infinite damage. In that case, the player's body is displacing the
|
-- radioactive material, so the effective distance should remain non-zero.
|
-- We therefore apply a lower distance bound of sqrt(0.75) m, which is
|
-- the maximum distance one can get from the node centre within the node.
|
--
|
-- A radioactive node is identified by being in the "radioactive" group,
|
-- and the group value signifies the strength of the radiation source.
|
-- The group value is the distance in metres from a node at which an
|
-- unshielded player will be damaged by 0.25 HP/s. Or, equivalently, it
|
-- is half the square root of the damage rate in HP/s that an unshielded
|
-- player 1 m away will take.
|
--
|
-- Shielding is assessed by sampling every 0.25 m along the path
|
-- from the source to the player, ignoring the source node itself.
|
-- The summed radiation resistance values from the sampled nodes yield
|
-- a measure of the total amount of radiation resistance on the path.
|
-- As in reality, shielding causes exponential attenuation of radiation.
|
-- However, the effect is scaled down relative to real life: each
|
-- metre-point of shielding, corresponding to a real-life halving of
|
-- radiation, reduces radiation by 0.01 nepers (a factor of about 1.01).
|
-- This scales down the difference between shielded and unshielded safe
|
-- distances, avoiding the latter becoming impractically large.
|
--
|
-- Damage is processed at rates down to 0.25 HP/s, which in the absence of
|
-- shielding is attained at the distance specified by the "radioactive"
|
-- group value. Computed damage rates below 0.25 HP/s result in no
|
-- damage at all to the player. This gives the player an opportunity
|
-- to be safe, and limits the range at which source/player interactions
|
-- need to be considered.
|
local assumed_abdomen_offset = vector.new(0, 1, 0)
|
local assumed_abdomen_offset_length = vector.length(assumed_abdomen_offset)
|
minetest.register_abm({
|
nodenames = {"group:radioactive"},
|
interval = 1,
|
chance = 1,
|
action = function (pos, node)
|
local strength = minetest.registered_nodes[node.name].groups.radioactive
|
for _, o in ipairs(minetest.get_objects_inside_radius(pos, strength + assumed_abdomen_offset_length)) do
|
if o:is_player() then
|
local rel = vector.subtract(vector.add(o:getpos(), assumed_abdomen_offset), pos)
|
local dist_sq = vector.length_square(rel)
|
local dist = math.sqrt(dist_sq)
|
local dirstep = dist == 0 and vector.new(0,0,0) or vector.divide(rel, dist*4)
|
local intpos = pos
|
local resistance = 0
|
for intdist = 0.25, dist, 0.25 do
|
intpos = vector.add(intpos, dirstep)
|
local intnodepos = vector.round(intpos)
|
if not vector.equals(intnodepos, pos) then
|
resistance = resistance + node_radiation_resistance(minetest.get_node(intnodepos).name)
|
end
|
end
|
local dmg_rate = 0.25 * strength*strength * math.exp(-0.0025*resistance) / math.max(0.75, dist_sq)
|
if dmg_rate >= 0.25 then
|
local dmg_int = math.floor(dmg_rate)
|
if math.random() < dmg_rate-dmg_int then
|
dmg_int = dmg_int + 1
|
end
|
if dmg_int > 0 then
|
o:set_hp(math.max(o:get_hp() - dmg_int, 0))
|
end
|
end
|
end
|
end
|
end,
|
})
|
|
-- radioactive materials that can result from destroying a reactor
|
|
for _, state in ipairs({ "flowing", "source" }) do
|
minetest.register_node("technic:corium_"..state, {
|
description = S(state == "source" and "Corium Source" or "Flowing Corium"),
|
drawtype = (state == "source" and "liquid" or "flowingliquid"),
|
[state == "source" and "tiles" or "special_tiles"] = {{
|
name = "technic_corium_"..state.."_animated.png",
|
animation = {
|
type = "vertical_frames",
|
aspect_w = 16,
|
aspect_h = 16,
|
length = 3.0,
|
},
|
}},
|
paramtype = "light",
|
paramtype2 = (state == "flowing" and "flowingliquid" or nil),
|
light_source = (state == "source" and 8 or 5),
|
walkable = false,
|
pointable = false,
|
diggable = false,
|
buildable_to = true,
|
drop = "",
|
drowning = 1,
|
liquidtype = state,
|
liquid_alternative_flowing = "technic:corium_flowing",
|
liquid_alternative_source = "technic:corium_source",
|
liquid_viscosity = LAVA_VISC,
|
liquid_renewable = false,
|
damage_per_second = 6,
|
post_effect_color = { a=192, r=80, g=160, b=80 },
|
groups = {
|
liquid = 2,
|
hot = 3,
|
igniter = 1,
|
radioactive = (state == "source" and 32 or 16),
|
not_in_creative_inventory = (state == "flowing" and 1 or nil),
|
},
|
})
|
end
|
|
if bucket and bucket.register_liquid then
|
bucket.register_liquid(
|
"technic:corium_source",
|
"technic:corium_flowing",
|
"technic:bucket_corium",
|
"technic_bucket_corium.png",
|
"Corium Bucket"
|
)
|
end
|
|
minetest.register_node("technic:chernobylite_block", {
|
description = S("Chernobylite Block"),
|
tiles = { "technic_chernobylite_block.png" },
|
is_ground_content = true,
|
groups = { cracky=1, radioactive=5, level=2 },
|
sounds = default.node_sound_stone_defaults(),
|
light_source = 2,
|
|
})
|
|
minetest.register_abm({
|
nodenames = {"group:water"},
|
neighbors = {"technic:corium_source"},
|
interval = 1,
|
chance = 1,
|
action = function (pos, node)
|
minetest.remove_node(pos)
|
end,
|
})
|
|
minetest.register_abm({
|
nodenames = {"technic:corium_flowing"},
|
neighbors = {"group:water"},
|
interval = 1,
|
chance = 1,
|
action = function (pos, node)
|
minetest.set_node(pos, {name="technic:chernobylite_block"})
|
end,
|
})
|
|
local griefing = technic.config:get_bool("enable_corium_griefing")
|
|
minetest.register_abm({
|
nodenames = {"technic:corium_flowing"},
|
interval = 5,
|
chance = (griefing and 10 or 1),
|
action = function (pos, node)
|
minetest.set_node(pos, {name="technic:chernobylite_block"})
|
end,
|
})
|
|
if griefing then
|
minetest.register_abm({
|
nodenames = { "technic:corium_source", "technic:corium_flowing" },
|
interval = 4,
|
chance = 4,
|
action = function (pos, node)
|
for _, offset in ipairs({
|
vector.new(1,0,0),
|
vector.new(-1,0,0),
|
vector.new(0,0,1),
|
vector.new(0,0,-1),
|
vector.new(0,-1,0),
|
}) do
|
if math.random(8) == 1 then
|
minetest.dig_node(vector.add(pos, offset))
|
end
|
end
|
end,
|
})
|
end
|
