game/technic.git

Audible siren to warn of reactor meltdown

Zefram

2014-07-25 d59055dd2b1a03449ff11318a2f210d37dd7e76a

commit \| author \| age
ee0765	1	-- The enriched uranium rod driven EU generator.
S	2	-- A very large and advanced machine providing vast amounts of power.
30adc3	3	-- Very efficient but also expensive to run as it needs uranium. (10000EU 86400 ticks (one week))
ee0765	4	-- Provides HV EUs that can be down converted as needed.
S	5	--
	6	-- The nuclear reactor core needs water and a protective shield to work.
	7	-- This is checked now and then and if the machine is tampered with... BOOM!
	8
	9	local burn_ticks = 7 * 24 * 60 * 60 -- (seconds).
	10	local power_supply = 100000 -- EUs
	11	local fuel_type = "technic:uranium_fuel" -- The reactor burns this stuff
	12
be2f30	13	local S = technic.getter
ee0765	14
ec008d	15	if not vector.length_square then
Z	16	vector.length_square = function (v)
	17	return v.xv.x + v.yv.y + v.z*v.z
17c5b6	18	end
Z	19	end
	20
ee0765	21	-- FIXME: recipe must make more sense like a rod recepticle, steam chamber, HV generator?
S	22	minetest.register_craft({
	23	output = 'technic:hv_nuclear_reactor_core',
	24	recipe = {
5e4a87	25	{'technic:carbon_plate', 'default:obsidian_glass', 'technic:carbon_plate'},
Z	26	{'technic:composite_plate', 'technic:machine_casing', 'technic:composite_plate'},
	27	{'technic:stainless_steel_ingot', 'technic:hv_cable0', 'technic:stainless_steel_ingot'},
ee0765	28	}
S	29	})
	30
	31	local generator_formspec =
	32	"invsize[8,9;]"..
be2f30	33	"label[0,0;"..S("Nuclear Reactor Rod Compartment").."]"..
ee0765	34	"list[current_name;src;2,1;3,2;]"..
S	35	"list[current_player;main;0,5;8,4;]"
	36
	37	-- "Boxy sphere"
	38	local nodebox = {
	39	{ -0.353, -0.353, -0.353, 0.353, 0.353, 0.353 }, -- Box
	40	{ -0.495, -0.064, -0.064, 0.495, 0.064, 0.064 }, -- Circle +-x
	41	{ -0.483, -0.128, -0.128, 0.483, 0.128, 0.128 },
	42	{ -0.462, -0.191, -0.191, 0.462, 0.191, 0.191 },
	43	{ -0.433, -0.249, -0.249, 0.433, 0.249, 0.249 },
	44	{ -0.397, -0.303, -0.303, 0.397, 0.303, 0.303 },
	45	{ -0.305, -0.396, -0.305, 0.305, 0.396, 0.305 }, -- Circle +-y
	46	{ -0.250, -0.432, -0.250, 0.250, 0.432, 0.250 },
	47	{ -0.191, -0.461, -0.191, 0.191, 0.461, 0.191 },
	48	{ -0.130, -0.482, -0.130, 0.130, 0.482, 0.130 },
	49	{ -0.066, -0.495, -0.066, 0.066, 0.495, 0.066 },
	50	{ -0.064, -0.064, -0.495, 0.064, 0.064, 0.495 }, -- Circle +-z
	51	{ -0.128, -0.128, -0.483, 0.128, 0.128, 0.483 },
	52	{ -0.191, -0.191, -0.462, 0.191, 0.191, 0.462 },
	53	{ -0.249, -0.249, -0.433, 0.249, 0.249, 0.433 },
	54	{ -0.303, -0.303, -0.397, 0.303, 0.303, 0.397 },
	55	}
	56
d59055	57	local reactor_siren = {}
Z	58	local function siren_set_state(pos, newstate)
	59	local hpos = minetest.hash_node_position(pos)
	60	local siren = reactor_siren[hpos]
	61	if not siren then
	62	if newstate == "off" then return end
	63	siren = {state="off"}
	64	reactor_siren[hpos] = siren
	65	end
	66	if newstate == "danger" and siren.state ~= "danger" then
	67	if siren.handle then minetest.sound_stop(siren.handle) end
	68	siren.handle = minetest.sound_play("technic_hv_nuclear_reactor_siren_danger_loop", {pos=pos, gain=1.5, loop=true, max_hear_distance=48})
	69	siren.state = "danger"
	70	elseif newstate == "clear" then
	71	if siren.handle then minetest.sound_stop(siren.handle) end
	72	local clear_handle = minetest.sound_play("technic_hv_nuclear_reactor_siren_clear", {pos=pos, gain=1.5, loop=false, max_hear_distance=48})
	73	siren.handle = clear_handle
	74	siren.state = "clear"
	75	minetest.after(10, function ()
	76	if siren.handle == clear_handle then
	77	minetest.sound_stop(clear_handle)
	78	if reactor_siren[hpos] == siren then
	79	reactor_siren[hpos] = nil
	80	end
	81	end
	82	end)
	83	elseif newstate == "off" and siren.state ~= "off" then
	84	if siren.handle then minetest.sound_stop(siren.handle) end
	85	siren.handle = nil
	86	reactor_siren[hpos] = nil
	87	end
	88	end
	89	local function siren_danger(pos, meta)
	90	meta:set_int("siren", 1)
	91	siren_set_state(pos, "danger")
	92	end
	93	local function siren_clear(pos, meta)
	94	if meta:get_int("siren") ~= 0 then
	95	siren_set_state(pos, "clear")
	96	meta:set_int("siren", 0)
	97	end
	98	end
	99
67b90f	100	local reactor_structure_badness = function(pos)
ee0765	101	-- The reactor consists of a 9x9x9 cube structure
S	102	-- A cross section through the middle:
	103	-- CCCC CCCC
	104	-- CBBB BBBC
	105	-- CBSS SSBC
	106	-- CBSWWWSBC
	107	-- CBSW#WSBC
	108	-- CBSW\|WSBC
	109	-- CBSS\|SSBC
	110	-- CBBB\|BBBC
	111	-- CCCC\|CCCC
	112	-- C = Concrete, B = Blast resistant concrete, S = Stainless Steel,
	113	-- W = water node, # = reactor core, \| = HV cable
	114	-- The man-hole and the HV cable is only in the middle
	115	-- The man-hole is optional
	116
	117	local vm = VoxelManip()
	118	local pos1 = vector.subtract(pos, 4)
	119	local pos2 = vector.add(pos, 4)
	120	local MinEdge, MaxEdge = vm:read_from_map(pos1, pos2)
	121	local data = vm:get_data()
	122	local area = VoxelArea:new({MinEdge=MinEdge, MaxEdge=MaxEdge})
	123
	124	local c_concrete = minetest.get_content_id("technic:concrete")
	125	local c_blast_concrete = minetest.get_content_id("technic:blast_resistant_concrete")
	126	local c_stainless_steel = minetest.get_content_id("technic:stainless_steel_block")
	127	local c_water_source = minetest.get_content_id("default:water_source")
	128	local c_water_flowing = minetest.get_content_id("default:water_flowing")
	129
	130	local concretelayer, blastlayer, steellayer, waterlayer = 0, 0, 0, 0
	131
	132	for z = pos1.z, pos2.z do
	133	for y = pos1.y, pos2.y do
	134	for x = pos1.x, pos2.x do
	135	-- If the position is in the outer layer
	136	if x == pos1.x or x == pos2.x or
	137	y == pos1.y or y == pos2.y or
	138	z == pos1.z or z == pos2.z then
	139	if data[area:index(x, y, z)] == c_concrete then
	140	concretelayer = concretelayer + 1
	141	end
	142	elseif x == pos1.x+1 or x == pos2.x-1 or
	143	y == pos1.y+1 or y == pos2.y-1 or
	144	z == pos1.z+1 or z == pos2.z-1 then
	145	if data[area:index(x, y, z)] == c_blast_concrete then
	146	blastlayer = blastlayer + 1
	147	end
	148	elseif x == pos1.x+2 or x == pos2.x-2 or
	149	y == pos1.y+2 or y == pos2.y-2 or
	150	z == pos1.z+2 or z == pos2.z-2 then
	151	if data[area:index(x, y, z)] == c_stainless_steel then
	152	steellayer = steellayer + 1
	153	end
	154	elseif x == pos1.x+3 or x == pos2.x-3 or
	155	y == pos1.y+3 or y == pos2.y-3 or
	156	z == pos1.z+3 or z == pos2.z-3 then
	157	local cid = data[area:index(x, y, z)]
	158	if cid == c_water_source or cid == c_water_flowing then
	159	waterlayer = waterlayer + 1
	160	end
	161	end
	162	end
	163	end
	164	end
67b90f	165	if waterlayer > 25 then waterlayer = 25 end
Z	166	if steellayer > 96 then steellayer = 96 end
	167	if blastlayer > 216 then blastlayer = 216 end
	168	if concretelayer > 384 then concretelayer = 384 end
	169	return (25 - waterlayer) + (96 - steellayer) + (216 - blastlayer) + (384 - concretelayer)
ee0765	170	end
S	171
67b90f	172	local function meltdown_reactor(pos)
Z	173	print("A reactor melted down at "..minetest.pos_to_string(pos))
366fc3	174	minetest.set_node(pos, {name="technic:corium_source"})
ee0765	175	end
67b90f	176
Z	177	minetest.register_abm({
	178	nodenames = {"technic:hv_nuclear_reactor_core_active"},
	179	interval = 1,
	180	chance = 1,
	181	action = function (pos, node)
	182	local meta = minetest.get_meta(pos)
	183	local badness = reactor_structure_badness(pos)
	184	local accum_badness = meta:get_int("structure_accumulated_badness")
	185	if badness == 0 then
	186	if accum_badness ~= 0 then
	187	meta:set_int("structure_accumulated_badness", accum_badness - 1)
d59055	188	siren_clear(pos, meta)
67b90f	189	end
Z	190	else
d59055	191	siren_danger(pos, meta)
67b90f	192	accum_badness = accum_badness + badness
Z	193	if accum_badness >= 100 then
	194	meltdown_reactor(pos)
	195	else
	196	meta:set_int("structure_accumulated_badness", accum_badness)
	197	end
	198	end
	199	end,
	200	})
ee0765	201
563a4c	202	local run = function(pos, node)
N	203	local meta = minetest.get_meta(pos)
	204	local machine_name = S("Nuclear %s Generator Core"):format("HV")
	205	local burn_time = meta:get_int("burn_time") or 0
ee0765	206
563a4c	207	if burn_time >= burn_ticks or burn_time == 0 then
N	208	local inv = meta:get_inventory()
	209	if not inv:is_empty("src") then
	210	local srclist = inv:get_list("src")
	211	local correct_fuel_count = 0
	212	for _, srcstack in pairs(srclist) do
	213	if srcstack then
	214	if srcstack:get_name() == fuel_type then
	215	correct_fuel_count = correct_fuel_count + 1
ee0765	216	end
S	217	end
563a4c	218	end
N	219	-- Check that the reactor is complete as well
	220	-- as the correct number of correct fuel
	221	if correct_fuel_count == 6 and
67b90f	222	reactor_structure_badness(pos) == 0 then
563a4c	223	meta:set_int("burn_time", 1)
N	224	technic.swap_node(pos, "technic:hv_nuclear_reactor_core_active")
	225	meta:set_int("HV_EU_supply", power_supply)
	226	for idx, srcstack in pairs(srclist) do
	227	srcstack:take_item()
	228	inv:set_stack("src", idx, srcstack)
ee0765	229	end
563a4c	230	return
ee0765	231	end
S	232	end
563a4c	233	meta:set_int("HV_EU_supply", 0)
N	234	meta:set_int("burn_time", 0)
	235	meta:set_string("infotext", S("%s Idle"):format(machine_name))
	236	technic.swap_node(pos, "technic:hv_nuclear_reactor_core")
67b90f	237	meta:set_int("structure_accumulated_badness", 0)
d59055	238	siren_clear(pos, meta)
563a4c	239	elseif burn_time > 0 then
N	240	burn_time = burn_time + 1
	241	meta:set_int("burn_time", burn_time)
	242	local percent = math.floor(burn_time / burn_ticks * 100)
	243	meta:set_string("infotext", machine_name.." ("..percent.."%)")
	244	meta:set_int("HV_EU_supply", power_supply)
ee0765	245	end
563a4c	246	end
N	247
	248	minetest.register_node("technic:hv_nuclear_reactor_core", {
	249	description = S("Nuclear %s Generator Core"):format("HV"),
	250	tiles = {"technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png",
	251	"technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png",
	252	"technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png"},
	253	groups = {snappy=2, choppy=2, oddly_breakable_by_hand=2, technic_machine=1},
	254	legacy_facedir_simple = true,
	255	sounds = default.node_sound_wood_defaults(),
	256	drawtype="nodebox",
	257	paramtype = "light",
	258	stack_max = 1,
	259	node_box = {
	260	type = "fixed",
	261	fixed = nodebox
	262	},
	263	on_construct = function(pos)
	264	local meta = minetest.get_meta(pos)
	265	meta:set_string("infotext", S("Nuclear %s Generator Core"):format("HV"))
	266	meta:set_int("HV_EU_supply", 0)
	267	-- Signal to the switching station that this device burns some
	268	-- sort of fuel and needs special handling
	269	meta:set_int("HV_EU_from_fuel", 1)
	270	meta:set_int("burn_time", 0)
	271	meta:set_string("formspec", generator_formspec)
	272	local inv = meta:get_inventory()
	273	inv:set_size("src", 6)
	274	end,
	275	can_dig = technic.machine_can_dig,
d59055	276	on_destruct = function(pos) siren_set_state(pos, "off") end,
563a4c	277	allow_metadata_inventory_put = technic.machine_inventory_put,
N	278	allow_metadata_inventory_take = technic.machine_inventory_take,
	279	allow_metadata_inventory_move = technic.machine_inventory_move,
	280	technic_run = run,
	281	})
	282
	283	minetest.register_node("technic:hv_nuclear_reactor_core_active", {
	284	tiles = {"technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png",
	285	"technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png",
	286	"technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png"},
ec008d	287	groups = {snappy=2, choppy=2, oddly_breakable_by_hand=2, technic_machine=1, radioactive=7, not_in_creative_inventory=1},
563a4c	288	legacy_facedir_simple = true,
N	289	sounds = default.node_sound_wood_defaults(),
	290	drop="technic:hv_nuclear_reactor_core",
	291	drawtype="nodebox",
	292	light_source = 15,
	293	paramtype = "light",
	294	node_box = {
	295	type = "fixed",
	296	fixed = nodebox
	297	},
	298	can_dig = technic.machine_can_dig,
67b90f	299	after_dig_node = meltdown_reactor,
d59055	300	on_destruct = function(pos) siren_set_state(pos, "off") end,
563a4c	301	allow_metadata_inventory_put = technic.machine_inventory_put,
N	302	allow_metadata_inventory_take = technic.machine_inventory_take,
	303	allow_metadata_inventory_move = technic.machine_inventory_move,
	304	technic_run = run,
1c617f	305	technic_on_disable = function(pos, node)
N	306	local timer = minetest.get_node_timer(pos)
	307	timer:start(1)
	308	end,
	309	on_timer = function(pos, node)
	310	local meta = minetest.get_meta(pos)
	311
	312	-- Connected back?
	313	if meta:get_int("HV_EU_timeout") > 0 then return end
	314
	315	local burn_time = meta:get_int("burn_time") or 0
	316
	317	if burn_time >= burn_ticks or burn_time == 0 then
	318	meta:set_int("HV_EU_supply", 0)
	319	meta:set_int("burn_time", 0)
	320	technic.swap_node(pos, "technic:hv_nuclear_reactor_core")
67b90f	321	meta:set_int("structure_accumulated_badness", 0)
d59055	322	siren_clear(pos, meta)
1c617f	323	return
N	324	end
	325
	326	meta:set_int("burn_time", burn_time + 1)
	327	local timer = minetest.get_node_timer(pos)
	328	timer:start(1)
	329	end,
ee0765	330	})
S	331
	332	technic.register_machine("HV", "technic:hv_nuclear_reactor_core", technic.producer)
	333	technic.register_machine("HV", "technic:hv_nuclear_reactor_core_active", technic.producer)
	334
ec008d	335	-- radioactivity
366fc3	336
ec008d	337	-- Radiation resistance represents the extent to which a material
Z	338	-- attenuates radiation passing through it; i.e., how good a radiation
	339	-- shield it is. This is identified per node type. For materials that
	340	-- exist in real life, the radiation resistance value that this system
	341	-- uses for a node type consisting of a solid cube of that material is the
	342	-- (approximate) number of halvings of ionising radiation that is achieved
	343	-- by a metre of the material in real life. This is approximately
	344	-- proportional to density, which provides a good way to estimate it.
	345	-- Homogeneous mixtures of materials have radiation resistance computed
	346	-- by a simple weighted mean. Note that the amount of attenuation that
	347	-- a material achieves in-game is not required to be (and is not) the
	348	-- same as the attenuation achieved in real life.
	349	--
	350	-- Radiation resistance for a node type may be specified in the node
	351	-- definition, under the key "radiation_resistance". As an interim
	352	-- measure, until node definitions widely include this, this code
	353	-- knows a bunch of values for particular node types in several mods,
	354	-- and values for groups of node types. The node definition takes
	355	-- precedence if it specifies a value. Nodes for which no value at
	356	-- all is known are taken to provide no radiation resistance at all;
	357	-- this is appropriate for the majority of node types. Only node types
	358	-- consisting of a fairly homogeneous mass of material should report
	359	-- non-zero radiation resistance; anything with non-uniform geometry
	360	-- or complex internal structure should show no radiation resistance.
	361	-- Fractional resistance values are permitted; two significant figures
	362	-- is the recommended precision.
	363	local default_radiation_resistance_per_node = {
	364	["default:brick"] = 13,
	365	["default:bronzeblock"] = 45,
	366	["default:clay"] = 15,
	367	["default:coalblock"] = 9.6,
	368	["default:cobble"] = 15,
	369	["default:copperblock"] = 46,
	370	["default:desert_cobble"] = 15,
	371	["default:desert_sand"] = 10,
	372	["default:desert_stone"] = 17,
	373	["default:desert_stonebrick"] = 17,
	374	["default:diamondblock"] = 24,
	375	["default:dirt"] = 8.2,
	376	["default:dirt_with_grass"] = 8.2,
	377	["default:dirt_with_grass_footsteps"] = 8.2,
	378	["default:dirt_with_snow"] = 8.2,
	379	["default:glass"] = 17,
	380	["default:goldblock"] = 170,
	381	["default:gravel"] = 10,
	382	["default:ice"] = 5.6,
	383	["default:lava_flowing"] = 8.5,
	384	["default:lava_source"] = 17,
	385	["default:mese"] = 21,
	386	["default:mossycobble"] = 15,
	387	["default:nyancat"] = 1000,
	388	["default:nyancat_rainbow"] = 1000,
	389	["default:obsidian"] = 18,
	390	["default:obsidian_glass"] = 18,
	391	["default:sand"] = 10,
	392	["default:sandstone"] = 15,
	393	["default:sandstonebrick"] = 15,
	394	["default:snowblock"] = 1.7,
	395	["default:steelblock"] = 40,
	396	["default:stone"] = 17,
	397	["default:stone_with_coal"] = 16,
	398	["default:stone_with_copper"] = 20,
	399	["default:stone_with_diamond"] = 18,
	400	["default:stone_with_gold"] = 34,
	401	["default:stone_with_iron"] = 20,
	402	["default:stone_with_mese"] = 17,
	403	["default:stonebrick"] = 17,
	404	["default:water_flowing"] = 2.8,
	405	["default:water_source"] = 5.6,
	406	["farming:desert_sand_soil"] = 10,
	407	["farming:desert_sand_soil_wet"] = 10,
	408	["farming:soil"] = 8.2,
	409	["farming:soil_wet"] = 8.2,
	410	["glooptest:akalin_crystal_glass"] = 21,
	411	["glooptest:akalinblock"] = 40,
	412	["glooptest:alatro_crystal_glass"] = 21,
	413	["glooptest:alatroblock"] = 40,
	414	["glooptest:amethystblock"] = 18,
	415	["glooptest:arol_crystal_glass"] = 21,
	416	["glooptest:crystal_glass"] = 21,
	417	["glooptest:emeraldblock"] = 19,
	418	["glooptest:heavy_crystal_glass"] = 21,
	419	["glooptest:mineral_akalin"] = 20,
	420	["glooptest:mineral_alatro"] = 20,
	421	["glooptest:mineral_amethyst"] = 17,
	422	["glooptest:mineral_arol"] = 20,
	423	["glooptest:mineral_desert_coal"] = 16,
	424	["glooptest:mineral_desert_iron"] = 20,
	425	["glooptest:mineral_emerald"] = 17,
	426	["glooptest:mineral_kalite"] = 20,
	427	["glooptest:mineral_ruby"] = 18,
	428	["glooptest:mineral_sapphire"] = 18,
	429	["glooptest:mineral_talinite"] = 20,
	430	["glooptest:mineral_topaz"] = 18,
	431	["glooptest:reinforced_crystal_glass"] = 21,
	432	["glooptest:rubyblock"] = 27,
	433	["glooptest:sapphireblock"] = 27,
	434	["glooptest:talinite_crystal_glass"] = 21,
	435	["glooptest:taliniteblock"] = 40,
	436	["glooptest:topazblock"] = 24,
	437	["mesecons_extrawires:mese_powered"] = 21,
	438	["moreblocks:cactus_brick"] = 13,
	439	["moreblocks:cactus_checker"] = 8.5,
	440	["moreblocks:circle_stone_bricks"] = 17,
	441	["moreblocks:clean_glass"] = 17,
	442	["moreblocks:coal_checker"] = 9.0,
	443	["moreblocks:coal_glass"] = 17,
	444	["moreblocks:coal_stone"] = 17,
	445	["moreblocks:coal_stone_bricks"] = 17,
	446	["moreblocks:glow_glass"] = 17,
	447	["moreblocks:grey_bricks"] = 15,
	448	["moreblocks:iron_checker"] = 11,
	449	["moreblocks:iron_glass"] = 17,
	450	["moreblocks:iron_stone"] = 17,
	451	["moreblocks:iron_stone_bricks"] = 17,
	452	["moreblocks:plankstone"] = 9.3,
	453	["moreblocks:split_stone_tile"] = 15,
	454	["moreblocks:split_stone_tile_alt"] = 15,
	455	["moreblocks:stone_tile"] = 15,
	456	["moreblocks:super_glow_glass"] = 17,
	457	["moreblocks:tar"] = 7.0,
	458	["moreblocks:wood_tile"] = 1.7,
	459	["moreblocks:wood_tile_center"] = 1.7,
	460	["moreblocks:wood_tile_down"] = 1.7,
	461	["moreblocks:wood_tile_flipped"] = 1.7,
	462	["moreblocks:wood_tile_full"] = 1.7,
	463	["moreblocks:wood_tile_left"] = 1.7,
	464	["moreblocks:wood_tile_right"] = 1.7,
	465	["moreblocks:wood_tile_up"] = 1.7,
	466	["moreores:mineral_mithril"] = 18,
	467	["moreores:mineral_silver"] = 21,
	468	["moreores:mineral_tin"] = 19,
	469	["moreores:mithril_block"] = 26,
	470	["moreores:silver_block"] = 53,
	471	["moreores:tin_block"] = 37,
	472	["snow:snow_brick"] = 2.8,
	473	["technic:brass_block"] = 43,
	474	["technic:carbon_steel_block"] = 40,
	475	["technic:cast_iron_block"] = 40,
	476	["technic:chernobylite_block"] = 40,
	477	["technic:chromium_block"] = 37,
	478	["technic:corium_flowing"] = 40,
	479	["technic:corium_source"] = 80,
	480	["technic:granite"] = 18,
	481	["technic:marble"] = 18,
	482	["technic:marble_bricks"] = 18,
	483	["technic:mineral_chromium"] = 19,
	484	["technic:mineral_uranium"] = 71,
	485	["technic:mineral_zinc"] = 19,
	486	["technic:stainless_steel_block"] = 40,
	487	["technic:uranium_block"] = 500,
	488	["technic:zinc_block"] = 36,
	489	["tnt:tnt"] = 11,
	490	["tnt:tnt_burning"] = 11,
	491	}
	492	local default_radiation_resistance_per_group = {
	493	concrete = 16,
	494	tree = 3.4,
	495	wood = 1.7,
	496	}
	497	local cache_radiation_resistance = {}
	498	local function node_radiation_resistance(nodename)
	499	local eff = cache_radiation_resistance[nodename]
	500	if eff then return eff end
	501	local def = minetest.registered_nodes[nodename] or {groups={}}
	502	eff = def.radiation_resistance or default_radiation_resistance_per_node[nodename]
	503	if not eff then
	504	for g, v in pairs(def.groups) do
	505	if v > 0 and default_radiation_resistance_per_group[g] then
	506	eff = default_radiation_resistance_per_group[g]
	507	break
	508	end
	509	end
	510	end
	511	if not eff then eff = 0 end
	512	cache_radiation_resistance[nodename] = eff
	513	return eff
	514	end
	515
	516	-- Radioactive nodes cause damage to nearby players. The damage
	517	-- effect depends on the intrinsic strength of the radiation source,
	518	-- the distance between the source and the player, and the shielding
	519	-- effect of the intervening material. These determine a rate of damage;
	520	-- total damage caused is the integral of this over time.
	521	--
	522	-- In the absence of effective shielding, for a specific source the
	523	-- damage rate varies realistically in inverse proportion to the square
	524	-- of the distance. (Distance is measured to the player's abdomen,
	525	-- not to the nominal player position which corresponds to the foot.)
	526	-- However, if the player is inside a non-walkable (liquid or gaseous)
	527	-- radioactive node, the nominal distance could go to zero, yielding
	528	-- infinite damage. In that case, the player's body is displacing the
	529	-- radioactive material, so the effective distance should remain non-zero.
	530	-- We therefore apply a lower distance bound of sqrt(0.75) m, which is
	531	-- the maximum distance one can get from the node centre within the node.
	532	--
	533	-- A radioactive node is identified by being in the "radioactive" group,
	534	-- and the group value signifies the strength of the radiation source.
	535	-- The group value is the distance in metres from a node at which an
	536	-- unshielded player will be damaged by 0.25 HP/s. Or, equivalently, it
	537	-- is half the square root of the damage rate in HP/s that an unshielded
	538	-- player 1 m away will take.
	539	--
	540	-- Shielding is assessed by sampling every 0.25 m along the path
	541	-- from the source to the player, ignoring the source node itself.
	542	-- The summed radiation resistance values from the sampled nodes yield
	543	-- a measure of the total amount of radiation resistance on the path.
	544	-- As in reality, shielding causes exponential attenuation of radiation.
	545	-- However, the effect is scaled down relative to real life: each
	546	-- metre-point of shielding, corresponding to a real-life halving of
	547	-- radiation, reduces radiation by 0.01 nepers (a factor of about 1.01).
	548	-- This scales down the difference between shielded and unshielded safe
	549	-- distances, avoiding the latter becoming impractically large.
	550	--
	551	-- Damage is processed at rates down to 0.25 HP/s, which in the absence of
	552	-- shielding is attained at the distance specified by the "radioactive"
	553	-- group value. Computed damage rates below 0.25 HP/s result in no
	554	-- damage at all to the player. This gives the player an opportunity
	555	-- to be safe, and limits the range at which source/player interactions
	556	-- need to be considered.
17c5b6	557	local assumed_abdomen_offset = vector.new(0, 1, 0)
Z	558	local assumed_abdomen_offset_length = vector.length(assumed_abdomen_offset)
366fc3	559	minetest.register_abm({
Z	560	nodenames = {"group:radioactive"},
	561	interval = 1,
	562	chance = 1,
	563	action = function (pos, node)
17c5b6	564	local strength = minetest.registered_nodes[node.name].groups.radioactive
ec008d	565	for _, o in ipairs(minetest.get_objects_inside_radius(pos, strength + assumed_abdomen_offset_length)) do
17c5b6	566	if o:is_player() then
ec008d	567	local rel = vector.subtract(vector.add(o:getpos(), assumed_abdomen_offset), pos)
Z	568	local dist_sq = vector.length_square(rel)
	569	local dist = math.sqrt(dist_sq)
	570	local dirstep = dist == 0 and vector.new(0,0,0) or vector.divide(rel, dist*4)
	571	local intpos = pos
	572	local resistance = 0
	573	for intdist = 0.25, dist, 0.25 do
	574	intpos = vector.add(intpos, dirstep)
	575	local intnodepos = vector.round(intpos)
	576	if not vector.equals(intnodepos, pos) then
	577	resistance = resistance + node_radiation_resistance(minetest.get_node(intnodepos).name)
	578	end
	579	end
	580	local dmg_rate = 0.25 * strengthstrength math.exp(-0.0025*resistance) / math.max(0.75, dist_sq)
17c5b6	581	if dmg_rate >= 0.25 then
Z	582	local dmg_int = math.floor(dmg_rate)
	583	if math.random() < dmg_rate-dmg_int then
	584	dmg_int = dmg_int + 1
	585	end
	586	if dmg_int > 0 then
	587	o:set_hp(math.max(o:get_hp() - dmg_int, 0))
	588	end
366fc3	589	end
Z	590	end
	591	end
	592	end,
	593	})
ec008d	594
Z	595	-- radioactive materials that can result from destroying a reactor
366fc3	596
Z	597	for _, state in ipairs({ "flowing", "source" }) do
	598	minetest.register_node("technic:corium_"..state, {
	599	description = S(state == "source" and "Corium Source" or "Flowing Corium"),
	600	drawtype = (state == "source" and "liquid" or "flowingliquid"),
	601	[state == "source" and "tiles" or "special_tiles"] = {{
	602	name = "technic_corium_"..state.."_animated.png",
	603	animation = {
	604	type = "vertical_frames",
	605	aspect_w = 16,
	606	aspect_h = 16,
	607	length = 3.0,
	608	},
	609	}},
	610	paramtype = "light",
	611	paramtype2 = (state == "flowing" and "flowingliquid" or nil),
e11f0f	612	light_source = (state == "source" and 8 or 5),
366fc3	613	walkable = false,
Z	614	pointable = false,
	615	diggable = false,
	616	buildable_to = true,
	617	drop = "",
	618	drowning = 1,
	619	liquidtype = state,
	620	liquid_alternative_flowing = "technic:corium_flowing",
	621	liquid_alternative_source = "technic:corium_source",
	622	liquid_viscosity = LAVA_VISC,
	623	liquid_renewable = false,
	624	damage_per_second = 6,
	625	post_effect_color = { a=192, r=80, g=160, b=80 },
	626	groups = {
	627	liquid = 2,
	628	hot = 3,
	629	igniter = 1,
ec008d	630	radioactive = (state == "source" and 32 or 16),
366fc3	631	not_in_creative_inventory = (state == "flowing" and 1 or nil),
Z	632	},
	633	})
	634	end
	635
	636	if bucket and bucket.register_liquid then
	637	bucket.register_liquid(
	638	"technic:corium_source",
	639	"technic:corium_flowing",
	640	"technic:bucket_corium",
	641	"technic_bucket_corium.png",
	642	"Corium Bucket"
	643	)
	644	end
	645
	646	minetest.register_node("technic:chernobylite_block", {
	647	description = S("Chernobylite Block"),
	648	tiles = { "technic_chernobylite_block.png" },
	649	is_ground_content = true,
ec008d	650	groups = { cracky=1, radioactive=5, level=2 },
366fc3	651	sounds = default.node_sound_stone_defaults(),
Z	652	light_source = 2,
	653
	654	})
	655
	656	minetest.register_abm({
	657	nodenames = {"group:water"},
	658	neighbors = {"technic:corium_source"},
	659	interval = 1,
	660	chance = 1,
	661	action = function (pos, node)
	662	minetest.remove_node(pos)
	663	end,
	664	})
	665
	666	minetest.register_abm({
	667	nodenames = {"technic:corium_flowing"},
	668	neighbors = {"group:water"},
	669	interval = 1,
	670	chance = 1,
	671	action = function (pos, node)
	672	minetest.set_node(pos, {name="technic:chernobylite_block"})
	673	end,
	674	})
	675
c5e948	676	local griefing = technic.config:get_bool("enable_corium_griefing")
Z	677
366fc3	678	minetest.register_abm({
Z	679	nodenames = {"technic:corium_flowing"},
	680	interval = 5,
c5e948	681	chance = (griefing and 10 or 1),
366fc3	682	action = function (pos, node)
Z	683	minetest.set_node(pos, {name="technic:chernobylite_block"})
	684	end,
	685	})
	686
c5e948	687	if griefing then
Z	688	minetest.register_abm({
	689	nodenames = { "technic:corium_source", "technic:corium_flowing" },
	690	interval = 4,
	691	chance = 4,
	692	action = function (pos, node)
	693	for _, offset in ipairs({
	694	vector.new(1,0,0),
	695	vector.new(-1,0,0),
	696	vector.new(0,0,1),
	697	vector.new(0,0,-1),
	698	vector.new(0,-1,0),
	699	}) do
	700	if math.random(8) == 1 then
	701	minetest.dig_node(vector.add(pos, offset))
	702	end
366fc3	703	end
c5e948	704	end,
Z	705	})
	706	end