| 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 | technic.DBG = 1 | |
| 31 | local dprint = technic.dprint | |
| 32 | ||
| 468d79 | 33 | technic.networks = {} |
| N | 34 | |
| ee0765 | 35 | minetest.register_craft({ |
| S | 36 | output = "technic:switching_station", |
| 37 | recipe = { | |
| 38 | {"default:steel_ingot", "technic:lv_transformer", "default:steel_ingot"}, | |
| 39 | {"default:copper_ingot", "technic:lv_cable0", "default:copper_ingot"}, | |
| 40 | {"default:steel_ingot", "technic:lv_cable0", "default:steel_ingot"} | |
| 41 | } | |
| 42 | }) | |
| ee5c6c | 43 | |
| ee0765 | 44 | minetest.register_node("technic:switching_station",{ |
| S | 45 | description = "Switching Station", |
| 46 | tiles = {"technic_water_mill_top_active.png", "technic_water_mill_top_active.png", | |
| 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) | |
| 59 | meta:set_string("infotext", "Switching Station") | |
| 60 | end, | |
| 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) |
| 70 | timeout = meta:get_int(tier.."_EU_timeout") | |
| 71 | if timeout == 0 then | |
| 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) | |
| 109 | elseif machines[name] == technic.battery then | |
| 110 | add_new_cable_node(BA_nodes, pos) | |
| 111 | end | |
| 112 | ||
| 113 | meta:set_int(tier.."_EU_timeout", 2) -- Touch node | |
| 114 | end | |
| 115 | end | |
| ee5c6c | 116 | |
| K | 117 | -- Traverse a network given a list of machines and a cable type name |
| ee0765 | 118 | local traverse_network = function(PR_nodes, RE_nodes, BA_nodes, all_nodes, i, machines, tier) |
| S | 119 | local pos = all_nodes[i] |
| 120 | local positions = { | |
| 121 | {x=pos.x+1, y=pos.y, z=pos.z}, | |
| 122 | {x=pos.x-1, y=pos.y, z=pos.z}, | |
| 123 | {x=pos.x, y=pos.y+1, z=pos.z}, | |
| 124 | {x=pos.x, y=pos.y-1, z=pos.z}, | |
| 125 | {x=pos.x, y=pos.y, z=pos.z+1}, | |
| 126 | {x=pos.x, y=pos.y, z=pos.z-1}} | |
| 127 | --print("ON") | |
| 128 | for i, cur_pos in pairs(positions) do | |
| 129 | check_node_subp(PR_nodes, RE_nodes, BA_nodes, all_nodes, cur_pos, machines, tier) | |
| 130 | end | |
| 131 | end | |
| ee5c6c | 132 | |
| f4ac2b | 133 | local touch_nodes = function(list, tier) |
| N | 134 | for _, pos in ipairs(list) do |
| 135 | local meta = minetest.get_meta(pos) | |
| 136 | meta:set_int(tier.."_EU_timeout", 2) -- Touch node | |
| 137 | end | |
| 138 | end | |
| 139 | ||
| 140 | local get_network = function(pos1, tier) | |
| 12d29c | 141 | local cached = technic.networks[minetest.hash_node_position(pos1)] |
| f4ac2b | 142 | if cached and cached.tier == tier then |
| N | 143 | touch_nodes(cached.PR_nodes, tier) |
| 144 | touch_nodes(cached.BA_nodes, tier) | |
| 145 | touch_nodes(cached.RE_nodes, tier) | |
| 146 | return cached.PR_nodes, cached.BA_nodes, cached.RE_nodes | |
| 147 | end | |
| 148 | local i = 1 | |
| 149 | local PR_nodes = {} | |
| 150 | local BA_nodes = {} | |
| 151 | local RE_nodes = {} | |
| 152 | local all_nodes = {pos1} | |
| 153 | repeat | |
| 154 | traverse_network(PR_nodes, RE_nodes, BA_nodes, all_nodes, | |
| 155 | i, technic.machines[tier], tier) | |
| 156 | i = i + 1 | |
| 157 | until all_nodes[i] == nil | |
| 12d29c | 158 | technic.networks[minetest.hash_node_position(pos1)] = {tier = tier, PR_nodes = PR_nodes, RE_nodes = RE_nodes, BA_nodes = BA_nodes} |
| f4ac2b | 159 | return PR_nodes, BA_nodes, RE_nodes |
| N | 160 | end |
| 161 | ||
| ee0765 | 162 | ----------------------------------------------- |
| S | 163 | -- The action code for the switching station -- |
| 164 | ----------------------------------------------- | |
| 165 | minetest.register_abm({ | |
| 166 | nodenames = {"technic:switching_station"}, | |
| ee5c6c | 167 | interval = 1, |
| K | 168 | chance = 1, |
| 169 | action = function(pos, node, active_object_count, active_object_count_wider) | |
| ee0765 | 170 | local meta = minetest.get_meta(pos) |
| S | 171 | local meta1 = nil |
| 172 | local pos1 = {} | |
| 173 | local PR_EU = 0 -- EUs from PR nodes | |
| 174 | local BA_PR_EU = 0 -- EUs from BA nodes (discharching) | |
| 175 | local BA_RE_EU = 0 -- EUs to BA nodes (charging) | |
| 176 | local RE_EU = 0 -- EUs to RE nodes | |
| ee5c6c | 177 | |
| ee0765 | 178 | local tier = "" |
| f4ac2b | 179 | local PR_nodes |
| N | 180 | local BA_nodes |
| 181 | local RE_nodes | |
| ee5c6c | 182 | |
| ee0765 | 183 | -- Which kind of network are we on: |
| S | 184 | pos1 = {x=pos.x, y=pos.y-1, z=pos.z} |
| ee5c6c | 185 | |
| ee0765 | 186 | local name = minetest.get_node(pos1).name |
| S | 187 | local tier = technic.get_cable_tier(name) |
| 188 | if tier then | |
| 468d79 | 189 | PR_nodes, BA_nodes, RE_nodes = get_network(pos1, tier) |
| ee0765 | 190 | else |
| S | 191 | --dprint("Not connected to a network") |
| 192 | meta:set_string("infotext", "Switching Station - no network") | |
| 193 | return | |
| 194 | end | |
| 195 | --dprint("nodes="..table.getn(all_nodes) | |
| 196 | -- .." PR="..table.getn(PR_nodes) | |
| 197 | -- .." BA="..table.getn(BA_nodes) | |
| 198 | -- .." RE="..table.getn(RE_nodes)) | |
| ee5c6c | 199 | |
| ee0765 | 200 | -- Strings for the meta data |
| S | 201 | local eu_demand_str = tier.."_EU_demand" |
| 202 | local eu_input_str = tier.."_EU_input" | |
| 203 | local eu_supply_str = tier.."_EU_supply" | |
| ee5c6c | 204 | |
| ee0765 | 205 | -- Get all the power from the PR nodes |
| S | 206 | local PR_eu_supply = 0 -- Total power |
| 207 | for _, pos1 in pairs(PR_nodes) do | |
| 208 | meta1 = minetest.get_meta(pos1) | |
| 209 | PR_eu_supply = PR_eu_supply + meta1:get_int(eu_supply_str) | |
| 210 | end | |
| 211 | --dprint("Total PR supply:"..PR_eu_supply) | |
| ee5c6c | 212 | |
| ee0765 | 213 | -- Get all the demand from the RE nodes |
| S | 214 | local RE_eu_demand = 0 |
| 215 | for _, pos1 in pairs(RE_nodes) do | |
| 216 | meta1 = minetest.get_meta(pos1) | |
| 217 | RE_eu_demand = RE_eu_demand + meta1:get_int(eu_demand_str) | |
| 218 | end | |
| 219 | --dprint("Total RE demand:"..RE_eu_demand) | |
| ee5c6c | 220 | |
| ee0765 | 221 | -- Get all the power from the BA nodes |
| S | 222 | local BA_eu_supply = 0 |
| 223 | for _, pos1 in pairs(BA_nodes) do | |
| 224 | meta1 = minetest.get_meta(pos1) | |
| 225 | BA_eu_supply = BA_eu_supply + meta1:get_int(eu_supply_str) | |
| 226 | end | |
| 227 | --dprint("Total BA supply:"..BA_eu_supply) | |
| ee5c6c | 228 | |
| ee0765 | 229 | -- Get all the demand from the BA nodes |
| S | 230 | local BA_eu_demand = 0 |
| 231 | for _, pos1 in pairs(BA_nodes) do | |
| 232 | meta1 = minetest.get_meta(pos1) | |
| 233 | BA_eu_demand = BA_eu_demand + meta1:get_int(eu_demand_str) | |
| 234 | end | |
| 235 | --dprint("Total BA demand:"..BA_eu_demand) | |
| ee5c6c | 236 | |
| ee0765 | 237 | meta:set_string("infotext", |
| S | 238 | "Switching Station. Supply: "..PR_eu_supply |
| 239 | .." Demand: "..RE_eu_demand) | |
| ee5c6c | 240 | |
| ee0765 | 241 | -- If the PR supply is enough for the RE demand supply them all |
| S | 242 | if PR_eu_supply >= RE_eu_demand then |
| 243 | --dprint("PR_eu_supply"..PR_eu_supply.." >= RE_eu_demand"..RE_eu_demand) | |
| 244 | for _, pos1 in pairs(RE_nodes) do | |
| 245 | meta1 = minetest.get_meta(pos1) | |
| 246 | local eu_demand = meta1:get_int(eu_demand_str) | |
| 247 | meta1:set_int(eu_input_str, eu_demand) | |
| 248 | end | |
| 249 | -- We have a surplus, so distribute the rest equally to the BA nodes | |
| 250 | -- Let's calculate the factor of the demand | |
| 251 | PR_eu_supply = PR_eu_supply - RE_eu_demand | |
| 252 | local charge_factor = 0 -- Assume all batteries fully charged | |
| 253 | if BA_eu_demand > 0 then | |
| 254 | charge_factor = PR_eu_supply / BA_eu_demand | |
| 255 | end | |
| 256 | for n, pos1 in pairs(BA_nodes) do | |
| 257 | meta1 = minetest.get_meta(pos1) | |
| 258 | local eu_demand = meta1:get_int(eu_demand_str) | |
| 259 | meta1:set_int(eu_input_str, math.floor(eu_demand * charge_factor)) | |
| 260 | --dprint("Charging battery:"..math.floor(eu_demand*charge_factor)) | |
| 261 | end | |
| 262 | return | |
| 263 | end | |
| ee5c6c | 264 | |
| ee0765 | 265 | -- If the PR supply is not enough for the RE demand we will discharge the batteries too |
| S | 266 | if PR_eu_supply + BA_eu_supply >= RE_eu_demand then |
| 267 | --dprint("PR_eu_supply "..PR_eu_supply.."+BA_eu_supply "..BA_eu_supply.." >= RE_eu_demand"..RE_eu_demand) | |
| 268 | for _, pos1 in pairs(RE_nodes) do | |
| 269 | meta1 = minetest.get_meta(pos1) | |
| 270 | local eu_demand = meta1:get_int(eu_demand_str) | |
| 271 | meta1:set_int(eu_input_str, eu_demand) | |
| 272 | end | |
| 273 | -- We have a deficit, so distribute to the BA nodes | |
| 274 | -- Let's calculate the factor of the supply | |
| 275 | local charge_factor = 0 -- Assume all batteries depleted | |
| 276 | if BA_eu_supply > 0 then | |
| 277 | charge_factor = (PR_eu_supply - RE_eu_demand) / BA_eu_supply | |
| 278 | end | |
| 279 | for n,pos1 in pairs(BA_nodes) do | |
| 280 | meta1 = minetest.get_meta(pos1) | |
| ee5c6c | 281 | local eu_supply = meta1:get_int(eu_supply_str) |
| ee0765 | 282 | meta1:set_int(eu_input_str, math.floor(eu_supply * charge_factor)) |
| S | 283 | --dprint("Discharging battery:"..math.floor(eu_supply*charge_factor)) |
| 284 | end | |
| 285 | return | |
| 286 | end | |
| ee5c6c | 287 | |
| ee0765 | 288 | -- If the PR+BA supply is not enough for the RE demand: Power only the batteries |
| S | 289 | local charge_factor = 0 -- Assume all batteries fully charged |
| 290 | if BA_eu_demand > 0 then | |
| 291 | charge_factor = PR_eu_supply / BA_eu_demand | |
| 292 | end | |
| 293 | for n, pos1 in pairs(BA_nodes) do | |
| 294 | meta1 = minetest.get_meta(pos1) | |
| 295 | local eu_demand = meta1:get_int(eu_demand_str) | |
| 296 | meta1:set_int(eu_input_str, math.floor(eu_demand * charge_factor)) | |
| 297 | end | |
| 298 | for n, pos1 in pairs(RE_nodes) do | |
| 299 | meta1 = minetest.get_meta(pos1) | |
| 300 | meta1:set_int(eu_input_str, 0) | |
| 301 | end | |
| ee5c6c | 302 | end, |
| K | 303 | }) |
| ee0765 | 304 | |
| S | 305 | for tier, machines in pairs(technic.machines) do |
| 306 | -- SPECIAL will not be traversed | |
| 307 | technic.register_machine(tier, "technic:switching_station", "SPECIAL") | |
| 308 | end | |
| 309 | ||
