game/technic.git

Zefram

2014-05-18 623fcae4a4ad3ec12cc242b29b0d781357cff3f7

commit \| author \| age
ee5c6c	1	-- SWITCHING STATION
K	2	-- The switching station is the center of all power distribution on an electric network.
	3	-- The station will collect all produced power from producers (PR) and batteries (BA)
	4	-- and distribute it to receivers (RE) and depleted batteries (BA).
	5	--
	6	-- It works like this:
	7	-- All PR,BA,RE nodes are indexed and tagged with the switching station.
	8	-- The tagging is to allow more stations to be built without allowing a cheat
	9	-- with duplicating power.
	10	-- All the RE nodes are queried for their current EU demand. Those which are off
	11	-- would require no or a small standby EU demand, while those which are on would
	12	-- require more.
	13	-- If the total demand is less than the available power they are all updated with the
	14	-- demand number.
	15	-- If any surplus exists from the PR nodes the batteries will be charged evenly with this.
	16	-- If the total demand requires draw on the batteries they will be discharged evenly.
	17	--
	18	-- If the total demand is more than the available power all RE nodes will be shut down.
	19	-- We have a brown-out situation.
	20	--
	21	-- Hence all the power distribution logic resides in this single node.
	22	--
	23	-- Nodes connected to the network will have one or more of these parameters as meta data:
	24	-- <LV\|MV\|HV>_EU_supply : Exists for PR and BA node types. This is the EU value supplied by the node. Output
	25	-- <LV\|MV\|HV>_EU_demand : Exists for RE and BA node types. This is the EU value the node requires to run. Output
	26	-- <LV\|MV\|HV>_EU_input : Exists for RE and BA node types. This is the actual EU value the network can give the node. Input
	27	--
	28	-- The reason the LV\|MV\|HV type is prepended toe meta data is because some machine could require several supplies to work.
	29	-- This way the supplies are separated per network.
	30
468d79	31	technic.networks = {}
be2f30	32
S	33	local S = technic.getter
468d79	34
ee0765	35	minetest.register_craft({
S	36	output = "technic:switching_station",
	37	recipe = {
68b7bc	38	{"technic:cast_iron_ingot", "technic:lv_transformer", "technic:cast_iron_ingot"},
Z	39	{"default:copper_ingot", "technic:lv_cable0", "default:copper_ingot"},
	40	{"technic:cast_iron_ingot", "technic:lv_cable0", "technic:cast_iron_ingot"}
ee0765	41	}
S	42	})
ee5c6c	43
ee0765	44	minetest.register_node("technic:switching_station",{
be2f30	45	description = S("Switching Station"),
ee0765	46	tiles = {"technic_water_mill_top_active.png", "technic_water_mill_top_active.png",
S	47	"technic_water_mill_top_active.png", "technic_water_mill_top_active.png",
	48	"technic_water_mill_top_active.png", "technic_water_mill_top_active.png"},
	49	groups = {snappy=2, choppy=2, oddly_breakable_by_hand=2},
	50	sounds = default.node_sound_wood_defaults(),
	51	drawtype = "nodebox",
	52	paramtype = "light",
	53	node_box = {
	54	type = "fixed",
	55	fixed = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
	56	},
	57	on_construct = function(pos)
	58	local meta = minetest.get_meta(pos)
be2f30	59	meta:set_string("infotext", S("Switching Station"))
ee0765	60	end,
S	61	})
ee5c6c	62
K	63	--------------------------------------------------
	64	-- Functions to help the machines on the electrical network
	65	--------------------------------------------------
	66	-- This one provides a timeout for a node in case it was disconnected from the network
	67	-- A node must be touched by the station continuously in order to function
ee0765	68	function technic.switching_station_timeout_count(pos, tier)
S	69	local meta = minetest.get_meta(pos)
d8437f	70	local timeout = meta:get_int(tier.."_EU_timeout")
ee0765	71	if timeout == 0 then
S	72	meta:set_int(tier.."_EU_input", 0)
	73	else
	74	meta:set_int(tier.."_EU_timeout", timeout - 1)
	75	end
	76	end
ee5c6c	77
K	78	--------------------------------------------------
	79	-- Functions to traverse the electrical network
	80	--------------------------------------------------
	81
	82	-- Add a wire node to the LV/MV/HV network
ee0765	83	local add_new_cable_node = function(nodes, pos)
S	84	-- Ignore if the node has already been added
	85	for i = 1, #nodes do
	86	if pos.x == nodes[i].x and
	87	pos.y == nodes[i].y and
	88	pos.z == nodes[i].z then
	89	return false
	90	end
	91	end
	92	table.insert(nodes, {x=pos.x, y=pos.y, z=pos.z, visited=1})
	93	return true
	94	end
ee5c6c	95
K	96	-- Generic function to add found connected nodes to the right classification array
ee0765	97	local check_node_subp = function(PR_nodes, RE_nodes, BA_nodes, all_nodes, pos, machines, tier)
S	98	local meta = minetest.get_meta(pos)
	99	local name = minetest.get_node(pos).name
	100
	101	if technic.is_tier_cable(name, tier) then
	102	add_new_cable_node(all_nodes, pos)
	103	elseif machines[name] then
	104	--dprint(name.." is a "..machines[name])
	105	if machines[name] == technic.producer then
	106	add_new_cable_node(PR_nodes, pos)
	107	elseif machines[name] == technic.receiver then
	108	add_new_cable_node(RE_nodes, pos)
623fca	109	elseif machines[name] == technic.producer_receiver then
Z	110	add_new_cable_node(PR_nodes, pos)
	111	add_new_cable_node(RE_nodes, pos)
ee0765	112	elseif machines[name] == technic.battery then
S	113	add_new_cable_node(BA_nodes, pos)
	114	end
	115
	116	meta:set_int(tier.."_EU_timeout", 2) -- Touch node
	117	end
	118	end
ee5c6c	119
K	120	-- Traverse a network given a list of machines and a cable type name
ee0765	121	local traverse_network = function(PR_nodes, RE_nodes, BA_nodes, all_nodes, i, machines, tier)
S	122	local pos = all_nodes[i]
	123	local positions = {
	124	{x=pos.x+1, y=pos.y, z=pos.z},
	125	{x=pos.x-1, y=pos.y, z=pos.z},
	126	{x=pos.x, y=pos.y+1, z=pos.z},
	127	{x=pos.x, y=pos.y-1, z=pos.z},
	128	{x=pos.x, y=pos.y, z=pos.z+1},
	129	{x=pos.x, y=pos.y, z=pos.z-1}}
	130	--print("ON")
	131	for i, cur_pos in pairs(positions) do
	132	check_node_subp(PR_nodes, RE_nodes, BA_nodes, all_nodes, cur_pos, machines, tier)
	133	end
	134	end
ee5c6c	135
f4ac2b	136	local touch_nodes = function(list, tier)
N	137	for _, pos in ipairs(list) do
	138	local meta = minetest.get_meta(pos)
	139	meta:set_int(tier.."_EU_timeout", 2) -- Touch node
	140	end
	141	end
	142
	143	local get_network = function(pos1, tier)
12d29c	144	local cached = technic.networks[minetest.hash_node_position(pos1)]
f4ac2b	145	if cached and cached.tier == tier then
N	146	touch_nodes(cached.PR_nodes, tier)
	147	touch_nodes(cached.BA_nodes, tier)
	148	touch_nodes(cached.RE_nodes, tier)
	149	return cached.PR_nodes, cached.BA_nodes, cached.RE_nodes
	150	end
	151	local i = 1
	152	local PR_nodes = {}
	153	local BA_nodes = {}
	154	local RE_nodes = {}
	155	local all_nodes = {pos1}
	156	repeat
	157	traverse_network(PR_nodes, RE_nodes, BA_nodes, all_nodes,
	158	i, technic.machines[tier], tier)
	159	i = i + 1
	160	until all_nodes[i] == nil
12d29c	161	technic.networks[minetest.hash_node_position(pos1)] = {tier = tier, PR_nodes = PR_nodes, RE_nodes = RE_nodes, BA_nodes = BA_nodes}
f4ac2b	162	return PR_nodes, BA_nodes, RE_nodes
N	163	end
	164
ee0765	165	-----------------------------------------------
S	166	-- The action code for the switching station --
	167	-----------------------------------------------
	168	minetest.register_abm({
	169	nodenames = {"technic:switching_station"},
ee5c6c	170	interval = 1,
K	171	chance = 1,
	172	action = function(pos, node, active_object_count, active_object_count_wider)
ee0765	173	local meta = minetest.get_meta(pos)
S	174	local meta1 = nil
	175	local pos1 = {}
	176	local PR_EU = 0 -- EUs from PR nodes
	177	local BA_PR_EU = 0 -- EUs from BA nodes (discharching)
	178	local BA_RE_EU = 0 -- EUs to BA nodes (charging)
	179	local RE_EU = 0 -- EUs to RE nodes
ee5c6c	180
ee0765	181	local tier = ""
f4ac2b	182	local PR_nodes
N	183	local BA_nodes
	184	local RE_nodes
be2f30	185	local machine_name = S("Switching Station")
ee5c6c	186
ee0765	187	-- Which kind of network are we on:
S	188	pos1 = {x=pos.x, y=pos.y-1, z=pos.z}
ee5c6c	189
ee0765	190	local name = minetest.get_node(pos1).name
S	191	local tier = technic.get_cable_tier(name)
	192	if tier then
468d79	193	PR_nodes, BA_nodes, RE_nodes = get_network(pos1, tier)
ee0765	194	else
S	195	--dprint("Not connected to a network")
be2f30	196	meta:set_string("infotext", S("%s Has No Network"):format(machine_name))
ee0765	197	return
S	198	end
	199	--dprint("nodes="..table.getn(all_nodes)
	200	-- .." PR="..table.getn(PR_nodes)
	201	-- .." BA="..table.getn(BA_nodes)
	202	-- .." RE="..table.getn(RE_nodes))
ee5c6c	203
ee0765	204	-- Strings for the meta data
S	205	local eu_demand_str = tier.."_EU_demand"
	206	local eu_input_str = tier.."_EU_input"
	207	local eu_supply_str = tier.."_EU_supply"
ee5c6c	208
ee0765	209	-- Get all the power from the PR nodes
S	210	local PR_eu_supply = 0 -- Total power
	211	for _, pos1 in pairs(PR_nodes) do
	212	meta1 = minetest.get_meta(pos1)
	213	PR_eu_supply = PR_eu_supply + meta1:get_int(eu_supply_str)
	214	end
	215	--dprint("Total PR supply:"..PR_eu_supply)
ee5c6c	216
ee0765	217	-- Get all the demand from the RE nodes
S	218	local RE_eu_demand = 0
	219	for _, pos1 in pairs(RE_nodes) do
	220	meta1 = minetest.get_meta(pos1)
	221	RE_eu_demand = RE_eu_demand + meta1:get_int(eu_demand_str)
	222	end
	223	--dprint("Total RE demand:"..RE_eu_demand)
ee5c6c	224
ee0765	225	-- Get all the power from the BA nodes
S	226	local BA_eu_supply = 0
	227	for _, pos1 in pairs(BA_nodes) do
	228	meta1 = minetest.get_meta(pos1)
	229	BA_eu_supply = BA_eu_supply + meta1:get_int(eu_supply_str)
	230	end
	231	--dprint("Total BA supply:"..BA_eu_supply)
ee5c6c	232
ee0765	233	-- Get all the demand from the BA nodes
S	234	local BA_eu_demand = 0
	235	for _, pos1 in pairs(BA_nodes) do
	236	meta1 = minetest.get_meta(pos1)
	237	BA_eu_demand = BA_eu_demand + meta1:get_int(eu_demand_str)
	238	end
	239	--dprint("Total BA demand:"..BA_eu_demand)
ee5c6c	240
ee0765	241	meta:set_string("infotext",
be2f30	242	S("%s. Supply: %d Demand: %d"):format(
S	243	machine_name, PR_eu_supply, RE_eu_demand))
ee5c6c	244
ee0765	245	-- If the PR supply is enough for the RE demand supply them all
S	246	if PR_eu_supply >= RE_eu_demand then
	247	--dprint("PR_eu_supply"..PR_eu_supply.." >= RE_eu_demand"..RE_eu_demand)
	248	for _, pos1 in pairs(RE_nodes) do
	249	meta1 = minetest.get_meta(pos1)
	250	local eu_demand = meta1:get_int(eu_demand_str)
	251	meta1:set_int(eu_input_str, eu_demand)
	252	end
	253	-- We have a surplus, so distribute the rest equally to the BA nodes
	254	-- Let's calculate the factor of the demand
	255	PR_eu_supply = PR_eu_supply - RE_eu_demand
	256	local charge_factor = 0 -- Assume all batteries fully charged
	257	if BA_eu_demand > 0 then
	258	charge_factor = PR_eu_supply / BA_eu_demand
	259	end
	260	for n, pos1 in pairs(BA_nodes) do
	261	meta1 = minetest.get_meta(pos1)
	262	local eu_demand = meta1:get_int(eu_demand_str)
	263	meta1:set_int(eu_input_str, math.floor(eu_demand * charge_factor))
	264	--dprint("Charging battery:"..math.floor(eu_demand*charge_factor))
	265	end
	266	return
	267	end
ee5c6c	268
ee0765	269	-- If the PR supply is not enough for the RE demand we will discharge the batteries too
S	270	if PR_eu_supply + BA_eu_supply >= RE_eu_demand then
	271	--dprint("PR_eu_supply "..PR_eu_supply.."+BA_eu_supply "..BA_eu_supply.." >= RE_eu_demand"..RE_eu_demand)
	272	for _, pos1 in pairs(RE_nodes) do
	273	meta1 = minetest.get_meta(pos1)
	274	local eu_demand = meta1:get_int(eu_demand_str)
	275	meta1:set_int(eu_input_str, eu_demand)
	276	end
	277	-- We have a deficit, so distribute to the BA nodes
	278	-- Let's calculate the factor of the supply
	279	local charge_factor = 0 -- Assume all batteries depleted
	280	if BA_eu_supply > 0 then
	281	charge_factor = (PR_eu_supply - RE_eu_demand) / BA_eu_supply
	282	end
	283	for n,pos1 in pairs(BA_nodes) do
	284	meta1 = minetest.get_meta(pos1)
ee5c6c	285	local eu_supply = meta1:get_int(eu_supply_str)
ee0765	286	meta1:set_int(eu_input_str, math.floor(eu_supply * charge_factor))
S	287	--dprint("Discharging battery:"..math.floor(eu_supply*charge_factor))
	288	end
	289	return
	290	end
ee5c6c	291
ee0765	292	-- If the PR+BA supply is not enough for the RE demand: Power only the batteries
S	293	local charge_factor = 0 -- Assume all batteries fully charged
	294	if BA_eu_demand > 0 then
	295	charge_factor = PR_eu_supply / BA_eu_demand
	296	end
	297	for n, pos1 in pairs(BA_nodes) do
	298	meta1 = minetest.get_meta(pos1)
	299	local eu_demand = meta1:get_int(eu_demand_str)
	300	meta1:set_int(eu_input_str, math.floor(eu_demand * charge_factor))
	301	end
	302	for n, pos1 in pairs(RE_nodes) do
	303	meta1 = minetest.get_meta(pos1)
	304	meta1:set_int(eu_input_str, 0)
	305	end
ee5c6c	306	end,
K	307	})
ee0765	308
S	309	for tier, machines in pairs(technic.machines) do
	310	-- SPECIAL will not be traversed
	311	technic.register_machine(tier, "technic:switching_station", "SPECIAL")
	312	end
	313