game/technic.git

don't attempt to force-load blocks if they're already loaded.

Vanessa Ezekowitz

2014-07-23 29c7ff5228864bcf5456f391b122c9eb477c754b

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 = {
e8a5a6	38	{"", "technic:lv_transformer", ""},
Z	39	{"default:copper_ingot", "technic:machine_casing", "default:copper_ingot"},
	40	{"technic:lv_cable0", "technic:lv_cable0", "technic:lv_cable0"}
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"))
563a4c	60	meta:set_string("active", 1)
ee0765	61	end,
S	62	})
ee5c6c	63
K	64	--------------------------------------------------
	65	-- Functions to traverse the electrical network
	66	--------------------------------------------------
	67
	68	-- Add a wire node to the LV/MV/HV network
ee0765	69	local add_new_cable_node = function(nodes, pos)
S	70	-- Ignore if the node has already been added
	71	for i = 1, #nodes do
	72	if pos.x == nodes[i].x and
	73	pos.y == nodes[i].y and
	74	pos.z == nodes[i].z then
	75	return false
	76	end
	77	end
	78	table.insert(nodes, {x=pos.x, y=pos.y, z=pos.z, visited=1})
	79	return true
	80	end
ee5c6c	81
563a4c	82	local load_position = function(pos)
29c7ff	83	if minetest.get_node_or_nil(pos) then return end
563a4c	84	local vm = VoxelManip()
N	85	local MinEdge, MaxEdge = vm:read_from_map(pos, pos)
	86	end
	87
ee5c6c	88	-- Generic function to add found connected nodes to the right classification array
563a4c	89	local check_node_subp = function(PR_nodes, RE_nodes, BA_nodes, SP_nodes, all_nodes, pos, machines, tier, sw_pos)
N	90	load_position(pos)
ee0765	91	local meta = minetest.get_meta(pos)
S	92	local name = minetest.get_node(pos).name
	93
	94	if technic.is_tier_cable(name, tier) then
	95	add_new_cable_node(all_nodes, pos)
	96	elseif machines[name] then
	97	--dprint(name.." is a "..machines[name])
	98	if machines[name] == technic.producer then
	99	add_new_cable_node(PR_nodes, pos)
	100	elseif machines[name] == technic.receiver then
	101	add_new_cable_node(RE_nodes, pos)
623fca	102	elseif machines[name] == technic.producer_receiver then
Z	103	add_new_cable_node(PR_nodes, pos)
	104	add_new_cable_node(RE_nodes, pos)
563a4c	105	elseif machines[name] == "SPECIAL" and
N	106	(pos.x ~= sw_pos.x or pos.y ~= sw_pos.y or pos.z ~= sw_pos.z) then
	107	-- Another switching station -> disable it
	108	add_new_cable_node(SP_nodes, pos)
	109	meta:set_int("active", 0)
	110	meta:set_string("active_pos", minetest.serialize(sw_pos))
ee0765	111	elseif machines[name] == technic.battery then
S	112	add_new_cable_node(BA_nodes, pos)
	113	end
	114
	115	meta:set_int(tier.."_EU_timeout", 2) -- Touch node
	116	end
	117	end
ee5c6c	118
K	119	-- Traverse a network given a list of machines and a cable type name
563a4c	120	local traverse_network = function(PR_nodes, RE_nodes, BA_nodes, SP_nodes, all_nodes, i, machines, tier, sw_pos)
ee0765	121	local pos = all_nodes[i]
S	122	local positions = {
	123	{x=pos.x+1, y=pos.y, z=pos.z},
	124	{x=pos.x-1, y=pos.y, z=pos.z},
	125	{x=pos.x, y=pos.y+1, z=pos.z},
	126	{x=pos.x, y=pos.y-1, z=pos.z},
	127	{x=pos.x, y=pos.y, z=pos.z+1},
	128	{x=pos.x, y=pos.y, z=pos.z-1}}
	129	--print("ON")
	130	for i, cur_pos in pairs(positions) do
563a4c	131	check_node_subp(PR_nodes, RE_nodes, BA_nodes, SP_nodes, all_nodes, cur_pos, machines, tier, sw_pos)
ee0765	132	end
S	133	end
ee5c6c	134
f4ac2b	135	local touch_nodes = function(list, tier)
N	136	for _, pos in ipairs(list) do
	137	local meta = minetest.get_meta(pos)
	138	meta:set_int(tier.."_EU_timeout", 2) -- Touch node
	139	end
	140	end
	141
563a4c	142	local get_network = function(sw_pos, pos1, tier)
12d29c	143	local cached = technic.networks[minetest.hash_node_position(pos1)]
f4ac2b	144	if cached and cached.tier == tier then
N	145	touch_nodes(cached.PR_nodes, tier)
	146	touch_nodes(cached.BA_nodes, tier)
	147	touch_nodes(cached.RE_nodes, tier)
563a4c	148	for _, pos in ipairs(cached.SP_nodes) do
N	149	local meta = minetest.get_meta(pos)
	150	meta:set_int("active", 0)
	151	meta:set_string("active_pos", minetest.serialize(sw_pos))
	152	end
f4ac2b	153	return cached.PR_nodes, cached.BA_nodes, cached.RE_nodes
N	154	end
	155	local i = 1
	156	local PR_nodes = {}
	157	local BA_nodes = {}
	158	local RE_nodes = {}
563a4c	159	local SP_nodes = {}
f4ac2b	160	local all_nodes = {pos1}
N	161	repeat
563a4c	162	traverse_network(PR_nodes, RE_nodes, BA_nodes, SP_nodes, all_nodes,
N	163	i, technic.machines[tier], tier, sw_pos)
f4ac2b	164	i = i + 1
N	165	until all_nodes[i] == nil
563a4c	166	technic.networks[minetest.hash_node_position(pos1)] = {tier = tier, PR_nodes = PR_nodes,
N	167	RE_nodes = RE_nodes, BA_nodes = BA_nodes, SP_nodes = SP_nodes}
f4ac2b	168	return PR_nodes, BA_nodes, RE_nodes
N	169	end
	170
ee0765	171	-----------------------------------------------
S	172	-- The action code for the switching station --
	173	-----------------------------------------------
	174	minetest.register_abm({
	175	nodenames = {"technic:switching_station"},
ee5c6c	176	interval = 1,
K	177	chance = 1,
	178	action = function(pos, node, active_object_count, active_object_count_wider)
ee0765	179	local meta = minetest.get_meta(pos)
S	180	local meta1 = nil
	181	local pos1 = {}
	182	local PR_EU = 0 -- EUs from PR nodes
	183	local BA_PR_EU = 0 -- EUs from BA nodes (discharching)
	184	local BA_RE_EU = 0 -- EUs to BA nodes (charging)
	185	local RE_EU = 0 -- EUs to RE nodes
ee5c6c	186
ee0765	187	local tier = ""
f4ac2b	188	local PR_nodes
N	189	local BA_nodes
	190	local RE_nodes
be2f30	191	local machine_name = S("Switching Station")
ee5c6c	192
563a4c	193	if meta:get_int("active") ~= 1 then
N	194	meta:set_int("active", 1)
	195	local active_pos = minetest.deserialize(meta:get_string("active_pos"))
	196	if active_pos then
	197	local meta1 = minetest.get_meta(active_pos)
	198	meta:set_string("infotext", S("%s (Slave)"):format(meta1:get_string("infotext")))
	199	end
	200	return
	201	end
	202
ee0765	203	-- Which kind of network are we on:
S	204	pos1 = {x=pos.x, y=pos.y-1, z=pos.z}
ee5c6c	205
ee0765	206	local name = minetest.get_node(pos1).name
S	207	local tier = technic.get_cable_tier(name)
	208	if tier then
563a4c	209	PR_nodes, BA_nodes, RE_nodes = get_network(pos, pos1, tier)
ee0765	210	else
S	211	--dprint("Not connected to a network")
be2f30	212	meta:set_string("infotext", S("%s Has No Network"):format(machine_name))
ee0765	213	return
S	214	end
563a4c	215
N	216	-- Run all the nodes
	217	local function run_nodes(list)
	218	for _, pos2 in ipairs(list) do
	219	load_position(pos2)
	220	local node2 = minetest.get_node(pos2)
	221	local nodedef
	222	if node2 and node2.name then
	223	nodedef = minetest.registered_nodes[node2.name]
	224	end
	225	if nodedef and nodedef.technic_run then
	226	nodedef.technic_run(pos2, node2)
	227	end
	228	end
	229	end
	230
	231	run_nodes(PR_nodes)
	232	run_nodes(RE_nodes)
	233	run_nodes(BA_nodes)
ee5c6c	234
ee0765	235	-- Strings for the meta data
S	236	local eu_demand_str = tier.."_EU_demand"
	237	local eu_input_str = tier.."_EU_input"
	238	local eu_supply_str = tier.."_EU_supply"
ee5c6c	239
ee0765	240	-- Get all the power from the PR nodes
S	241	local PR_eu_supply = 0 -- Total power
	242	for _, pos1 in pairs(PR_nodes) do
	243	meta1 = minetest.get_meta(pos1)
	244	PR_eu_supply = PR_eu_supply + meta1:get_int(eu_supply_str)
	245	end
	246	--dprint("Total PR supply:"..PR_eu_supply)
ee5c6c	247
ee0765	248	-- Get all the demand from the RE nodes
S	249	local RE_eu_demand = 0
	250	for _, pos1 in pairs(RE_nodes) do
	251	meta1 = minetest.get_meta(pos1)
	252	RE_eu_demand = RE_eu_demand + meta1:get_int(eu_demand_str)
	253	end
	254	--dprint("Total RE demand:"..RE_eu_demand)
ee5c6c	255
ee0765	256	-- Get all the power from the BA nodes
S	257	local BA_eu_supply = 0
	258	for _, pos1 in pairs(BA_nodes) do
	259	meta1 = minetest.get_meta(pos1)
	260	BA_eu_supply = BA_eu_supply + meta1:get_int(eu_supply_str)
	261	end
	262	--dprint("Total BA supply:"..BA_eu_supply)
ee5c6c	263
ee0765	264	-- Get all the demand from the BA nodes
S	265	local BA_eu_demand = 0
	266	for _, pos1 in pairs(BA_nodes) do
	267	meta1 = minetest.get_meta(pos1)
	268	BA_eu_demand = BA_eu_demand + meta1:get_int(eu_demand_str)
	269	end
	270	--dprint("Total BA demand:"..BA_eu_demand)
ee5c6c	271
ee0765	272	meta:set_string("infotext",
be2f30	273	S("%s. Supply: %d Demand: %d"):format(
S	274	machine_name, PR_eu_supply, RE_eu_demand))
ee5c6c	275
ee0765	276	-- If the PR supply is enough for the RE demand supply them all
S	277	if PR_eu_supply >= RE_eu_demand then
	278	--dprint("PR_eu_supply"..PR_eu_supply.." >= RE_eu_demand"..RE_eu_demand)
	279	for _, pos1 in pairs(RE_nodes) do
	280	meta1 = minetest.get_meta(pos1)
	281	local eu_demand = meta1:get_int(eu_demand_str)
	282	meta1:set_int(eu_input_str, eu_demand)
	283	end
	284	-- We have a surplus, so distribute the rest equally to the BA nodes
	285	-- Let's calculate the factor of the demand
	286	PR_eu_supply = PR_eu_supply - RE_eu_demand
	287	local charge_factor = 0 -- Assume all batteries fully charged
	288	if BA_eu_demand > 0 then
	289	charge_factor = PR_eu_supply / BA_eu_demand
	290	end
	291	for n, pos1 in pairs(BA_nodes) do
	292	meta1 = minetest.get_meta(pos1)
	293	local eu_demand = meta1:get_int(eu_demand_str)
	294	meta1:set_int(eu_input_str, math.floor(eu_demand * charge_factor))
	295	--dprint("Charging battery:"..math.floor(eu_demand*charge_factor))
	296	end
	297	return
	298	end
ee5c6c	299
ee0765	300	-- If the PR supply is not enough for the RE demand we will discharge the batteries too
S	301	if PR_eu_supply + BA_eu_supply >= RE_eu_demand then
	302	--dprint("PR_eu_supply "..PR_eu_supply.."+BA_eu_supply "..BA_eu_supply.." >= RE_eu_demand"..RE_eu_demand)
	303	for _, pos1 in pairs(RE_nodes) do
	304	meta1 = minetest.get_meta(pos1)
	305	local eu_demand = meta1:get_int(eu_demand_str)
	306	meta1:set_int(eu_input_str, eu_demand)
	307	end
	308	-- We have a deficit, so distribute to the BA nodes
	309	-- Let's calculate the factor of the supply
	310	local charge_factor = 0 -- Assume all batteries depleted
	311	if BA_eu_supply > 0 then
	312	charge_factor = (PR_eu_supply - RE_eu_demand) / BA_eu_supply
	313	end
	314	for n,pos1 in pairs(BA_nodes) do
	315	meta1 = minetest.get_meta(pos1)
ee5c6c	316	local eu_supply = meta1:get_int(eu_supply_str)
ee0765	317	meta1:set_int(eu_input_str, math.floor(eu_supply * charge_factor))
S	318	--dprint("Discharging battery:"..math.floor(eu_supply*charge_factor))
	319	end
	320	return
	321	end
ee5c6c	322
ee0765	323	-- If the PR+BA supply is not enough for the RE demand: Power only the batteries
S	324	local charge_factor = 0 -- Assume all batteries fully charged
	325	if BA_eu_demand > 0 then
	326	charge_factor = PR_eu_supply / BA_eu_demand
	327	end
	328	for n, pos1 in pairs(BA_nodes) do
	329	meta1 = minetest.get_meta(pos1)
	330	local eu_demand = meta1:get_int(eu_demand_str)
	331	meta1:set_int(eu_input_str, math.floor(eu_demand * charge_factor))
	332	end
	333	for n, pos1 in pairs(RE_nodes) do
	334	meta1 = minetest.get_meta(pos1)
	335	meta1:set_int(eu_input_str, 0)
	336	end
ee5c6c	337	end,
K	338	})
ee0765	339
563a4c	340	-- Timeout ABM
N	341	-- Timeout for a node in case it was disconnected from the network
	342	-- A node must be touched by the station continuously in order to function
	343	local function switching_station_timeout_count(pos, tier)
	344	local meta = minetest.get_meta(pos)
	345	local timeout = meta:get_int(tier.."_EU_timeout")
	346	if timeout <= 0 then
	347	--meta:set_int(tier.."_EU_input", 0) -- Not needed anymore
	348	return true
	349	else
	350	meta:set_int(tier.."_EU_timeout", timeout - 1)
	351	return false
	352	end
	353	end
	354	minetest.register_abm({
	355	nodenames = {"group:technic_machine"},
	356	interval = 1,
	357	chance = 1,
	358	action = function(pos, node, active_object_count, active_object_count_wider)
	359	for tier, machines in pairs(technic.machines) do
	360	if machines[node.name] and switching_station_timeout_count(pos, tier) then
	361	local nodedef = minetest.registered_nodes[node.name]
	362	if nodedef and nodedef.technic_disabled_machine_name then
	363	node.name = nodedef.technic_disabled_machine_name
	364	minetest.swap_node(pos, node)
1c617f	365	elseif nodedef and nodedef.technic_on_disable then
N	366	nodedef.technic_on_disable(pos, node)
563a4c	367	end
N	368	if nodedef then
	369	local meta = minetest.get_meta(pos)
	370	meta:set_string("infotext", S("%s Has No Network"):format(nodedef.description))
	371	end
	372	end
	373	end
	374	end,
	375	})
	376
ee0765	377	for tier, machines in pairs(technic.machines) do
S	378	-- SPECIAL will not be traversed
	379	technic.register_machine(tier, "technic:switching_station", "SPECIAL")
	380	end
	381