| 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 | ||
| 33 | minetest.register_craft( | |
| 34 | { | |
| 35 | output = 'technic:switching_station 1', | |
| 36 | recipe = { | |
| 37 | {'technic:lv_transformer', 'technic:mv_transformer', 'technic:hv_transformer'}, | |
| 38 | {'technic:lv_transformer', 'technic:mv_transformer', 'technic:hv_transformer'}, | |
| 39 | {'technic:lv_cable', 'technic:mv_cable', 'technic:hv_cable'}, | |
| 40 | } | |
| 41 | }) | |
| 42 | ||
| 43 | minetest.register_node( | |
| 44 | "technic:switching_station", | |
| 45 | {description = "Switching Station", | |
| 9770be | 46 | tiles = {"technic_water_mill_top_active.png", "technic_water_mill_top_active.png", "technic_water_mill_top_active.png", |
| K | 47 | "technic_water_mill_top_active.png", "technic_water_mill_top_active.png", "technic_water_mill_top_active.png"}, |
| ee5c6c | 48 | groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2}, |
| K | 49 | sounds = default.node_sound_wood_defaults(), |
| 50 | drawtype = "nodebox", | |
| 51 | paramtype = "light", | |
| 52 | is_ground_content = true, | |
| 53 | node_box = { | |
| 54 | type = "fixed", | |
| 55 | fixed = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5}, | |
| 56 | }, | |
| 57 | selection_box = { | |
| 58 | type = "fixed", | |
| 59 | fixed = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5}, | |
| 60 | }, | |
| 61 | on_construct = function(pos) | |
| 62 | local meta = minetest.env:get_meta(pos) | |
| 63 | meta:set_string("infotext", "Switching Station") | |
| 64 | -- minetest.chat_send_player(puncher:get_player_name(), "Switching station constructed. Punch the station to shut down the network."); | |
| 65 | -- meta:set_int("active", 1) | |
| 66 | end, | |
| 67 | -- on_punch = function(pos, node, puncher) | |
| 68 | -- local meta = minetest.env:get_meta(pos) | |
| 69 | -- local active = meta:get_int("active") | |
| 70 | -- if active == 1 then | |
| 71 | -- meta:set_int("active", 0) | |
| 72 | -- minetest.chat_send_player(puncher:get_player_name(), "Electrical network shut down. Punch again to turn it on."); | |
| 73 | -- else | |
| 74 | -- meta:set_int("active", 1) | |
| 75 | -- minetest.chat_send_player(puncher:get_player_name(), "Electrical network turned on. Punch again to shut it down."); | |
| 76 | -- end | |
| 77 | -- end | |
| 78 | }) | |
| 79 | ||
| 80 | -------------------------------------------------- | |
| 81 | -- Functions to help the machines on the electrical network | |
| 82 | -------------------------------------------------- | |
| 83 | -- This one provides a timeout for a node in case it was disconnected from the network | |
| 84 | -- A node must be touched by the station continuously in order to function | |
| 85 | technic.switching_station_timeout_count = function(pos, machine_tier) | |
| 86 | local meta = minetest.env:get_meta(pos) | |
| 87 | timeout = meta:get_int(machine_tier.."_EU_timeout") | |
| 88 | --print("Counting timeout "..timeout) | |
| 89 | if timeout == 0 then | |
| 90 | --print("OFF") | |
| 91 | meta:set_int(machine_tier.."_EU_input", 0) | |
| 92 | else | |
| 93 | --print("ON") | |
| 94 | meta:set_int(machine_tier.."_EU_timeout", timeout-1) | |
| 95 | end | |
| 96 | end | |
| 97 | ||
| 98 | -------------------------------------------------- | |
| 99 | -- Functions to traverse the electrical network | |
| 100 | -------------------------------------------------- | |
| 101 | ||
| 102 | -- Add a wire node to the LV/MV/HV network | |
| 103 | local add_new_cable_node = function(nodes,pos) | |
| 104 | local i = 1 | |
| 105 | repeat | |
| 106 | if nodes[i]==nil then break end | |
| 107 | if pos.x==nodes[i].x and pos.y==nodes[i].y and pos.z==nodes[i].z then return false end | |
| 108 | i=i+1 | |
| 109 | until false | |
| 110 | nodes[i] = {x=pos.x, y=pos.y, z=pos.z, visited=1} -- copy position | |
| 111 | return true | |
| 112 | end | |
| 113 | ||
| 114 | -- Generic function to add found connected nodes to the right classification array | |
| 115 | local check_node_subp = function(PR_nodes,RE_nodes,BA_nodes,all_nodes,pos,machines,cablename) | |
| 116 | local meta = minetest.env:get_meta(pos) | |
| 117 | local name = minetest.env:get_node(pos).name | |
| 118 | if meta:get_float(cablename)==1 then | |
| 119 | add_new_cable_node(all_nodes,pos) | |
| 120 | elseif machines[name] then | |
| 121 | --dprint(name.." is a "..machines[name]) | |
| 122 | if machines[name] == "PR" then | |
| 123 | add_new_cable_node(PR_nodes,pos) | |
| 124 | elseif machines[name] == "RE" then | |
| 125 | add_new_cable_node(RE_nodes,pos) | |
| 126 | elseif machines[name] == "BA" then | |
| 127 | add_new_cable_node(BA_nodes,pos) | |
| 128 | end | |
| 129 | if cablename == "cablelike" then | |
| 130 | meta:set_int("LV_EU_timeout", 2) -- Touch node | |
| 131 | elseif cablename == "mv_cablelike" then | |
| 132 | meta:set_int("MV_EU_timeout", 2) -- Touch node | |
| 133 | elseif cablename == "hv_cablelike" then | |
| 134 | meta:set_int("HV_EU_timeout", 2) -- Touch node | |
| 135 | end | |
| 136 | end | |
| 137 | end | |
| 138 | ||
| 139 | -- Traverse a network given a list of machines and a cable type name | |
| 140 | local traverse_network = function(PR_nodes,RE_nodes,BA_nodes,all_nodes, i, machines, cablename) | |
| 141 | local pos = {x=all_nodes[i].x, y=all_nodes[i].y, z=all_nodes[i].z} -- copy position | |
| 142 | pos.x=pos.x+1 | |
| 143 | check_node_subp(PR_nodes,RE_nodes,BA_nodes,all_nodes,pos, machines, cablename) | |
| 144 | pos.x=pos.x-2 | |
| 145 | check_node_subp(PR_nodes,RE_nodes,BA_nodes,all_nodes,pos, machines, cablename) | |
| 146 | pos.x=pos.x+1 | |
| 147 | ||
| 148 | pos.y=pos.y+1 | |
| 149 | check_node_subp(PR_nodes,RE_nodes,BA_nodes,all_nodes,pos, machines, cablename) | |
| 150 | pos.y=pos.y-2 | |
| 151 | check_node_subp(PR_nodes,RE_nodes,BA_nodes,all_nodes,pos, machines, cablename) | |
| 152 | pos.y=pos.y+1 | |
| 153 | ||
| 154 | pos.z=pos.z+1 | |
| 155 | check_node_subp(PR_nodes,RE_nodes,BA_nodes,all_nodes,pos, machines, cablename) | |
| 156 | pos.z=pos.z-2 | |
| 157 | check_node_subp(PR_nodes,RE_nodes,BA_nodes,all_nodes,pos, machines, cablename) | |
| 158 | pos.z=pos.z+1 | |
| 159 | end | |
| 160 | ||
| 161 | ---------------------------------------------- | |
| 162 | -- The action code for the switching station | |
| 163 | ---------------------------------------------- | |
| 164 | minetest.register_abm( | |
| 165 | {nodenames = {"technic:switching_station"}, | |
| 166 | interval = 1, | |
| 167 | chance = 1, | |
| 168 | action = function(pos, node, active_object_count, active_object_count_wider) | |
| 169 | local meta = minetest.env:get_meta(pos) | |
| 170 | local meta1 = nil | |
| 171 | local pos1 = {} | |
| 172 | local PR_EU = 0 -- EUs from PR nodes | |
| 173 | local BA_PR_EU = 0 -- EUs from BA nodes (discharching) | |
| 174 | local BA_RE_EU = 0 -- EUs to BA nodes (charging) | |
| 175 | local RE_EU = 0 -- EUs to RE nodes | |
| 176 | ||
| 177 | local network = "" | |
| 178 | local all_nodes = {} | |
| 179 | local PR_nodes = {} | |
| 180 | local BA_nodes = {} | |
| 181 | local RE_nodes = {} | |
| 182 | ||
| 183 | -- -- Possible to turn off the entire network | |
| 184 | -- if meta:get_int("active") == 0 then | |
| 185 | -- for _,pos1 in pairs(RE_nodes) do | |
| 186 | -- meta1 = minetest.env:get_meta(pos1) | |
| 187 | -- meta1:set_int("EU_input", 0) | |
| 188 | -- end | |
| 189 | -- for _,pos1 in pairs(BA_nodes) do | |
| 190 | -- meta1 = minetest.env:get_meta(pos1) | |
| 191 | -- meta1:set_int("EU_input", 0) | |
| 192 | -- end | |
| 193 | -- return | |
| 194 | -- end | |
| 195 | ||
| 196 | -- Which kind of network are we on: | |
| 197 | pos1 = {x=pos.x, y=pos.y-1, z=pos.z} | |
| 198 | all_nodes[1] = pos1 | |
| 199 | ||
| 200 | meta1 = minetest.env:get_meta(pos1) | |
| 201 | if meta1:get_float("cablelike") ==1 then | |
| 202 | -- LV type | |
| 203 | --dprint("LV type") | |
| 204 | network = "LV" | |
| 205 | local table_index = 1 | |
| 206 | repeat | |
| 207 | traverse_network(PR_nodes,RE_nodes,BA_nodes,all_nodes,table_index, technic.LV_machines, "cablelike") | |
| 208 | table_index = table_index + 1 | |
| 209 | if all_nodes[table_index] == nil then break end | |
| 210 | until false | |
| 211 | elseif meta1:get_float("mv_cablelike") ==1 then | |
| 212 | -- MV type | |
| 213 | --dprint("MV type") | |
| 214 | network = "MV" | |
| 215 | local table_index = 1 | |
| 216 | repeat | |
| 217 | traverse_network(PR_nodes,RE_nodes,BA_nodes,all_nodes,table_index, technic.MV_machines, "mv_cablelike") | |
| 218 | table_index = table_index + 1 | |
| 219 | if all_nodes[table_index] == nil then break end | |
| 220 | until false | |
| 221 | elseif meta1:get_float("hv_cablelike") ==1 then | |
| 222 | -- HV type | |
| 223 | --dprint("HV type") | |
| 224 | network = "HV" | |
| 225 | local table_index = 1 | |
| 226 | repeat | |
| 227 | traverse_network(PR_nodes,RE_nodes,BA_nodes,all_nodes,table_index, technic.HV_machines, "hv_cablelike") | |
| 228 | table_index = table_index + 1 | |
| 229 | if all_nodes[table_index] == nil then break end | |
| 230 | until false | |
| 231 | else | |
| 232 | -- No type :-) | |
| 233 | --dprint("Not connected to a network") | |
| 234 | meta:set_string("infotext", "Switching Station - no network") | |
| 235 | return | |
| 236 | end | |
| 237 | --dprint("nodes="..table.getn(all_nodes).." PR="..table.getn(PR_nodes).." BA="..table.getn(BA_nodes).." RE="..table.getn(RE_nodes)) | |
| 238 | ||
| 239 | -- Strings for the meta data | |
| 240 | local eu_demand_str = network.."_EU_demand" | |
| 241 | local eu_input_str = network.."_EU_input" | |
| 242 | local eu_supply_str = network.."_EU_supply" | |
| 243 | local eu_from_fuel_str = network.."_EU_from_fuel" | |
| 244 | ||
| 245 | -- Get all the power from the PR nodes | |
| 246 | local PR_eu_supply = 0 -- Total power | |
| 247 | for _,pos1 in pairs(PR_nodes) do | |
| 248 | meta1 = minetest.env:get_meta(pos1) | |
| 249 | PR_eu_supply = PR_eu_supply + meta1:get_int(eu_supply_str) | |
| 250 | end | |
| 251 | --dprint("Total PR supply:"..PR_eu_supply) | |
| 252 | ||
| 253 | -- Get all the demand from the RE nodes | |
| 254 | local RE_eu_demand = 0 | |
| 255 | for _,pos1 in pairs(RE_nodes) do | |
| 256 | meta1 = minetest.env:get_meta(pos1) | |
| 257 | RE_eu_demand = RE_eu_demand + meta1:get_int(eu_demand_str) | |
| 258 | end | |
| 259 | --dprint("Total RE demand:"..RE_eu_demand) | |
| 260 | ||
| 261 | -- Get all the power from the BA nodes | |
| 262 | local BA_eu_supply = 0 | |
| 263 | for _,pos1 in pairs(BA_nodes) do | |
| 264 | meta1 = minetest.env:get_meta(pos1) | |
| 265 | BA_eu_supply = BA_eu_supply + meta1:get_int(eu_supply_str) | |
| 266 | end | |
| 267 | --dprint("Total BA supply:"..BA_eu_supply) | |
| 268 | ||
| 269 | -- Get all the demand from the BA nodes | |
| 270 | local BA_eu_demand = 0 | |
| 271 | for _,pos1 in pairs(BA_nodes) do | |
| 272 | meta1 = minetest.env:get_meta(pos1) | |
| 273 | BA_eu_demand = BA_eu_demand + meta1:get_int(eu_demand_str) | |
| 274 | end | |
| 275 | --dprint("Total BA demand:"..BA_eu_demand) | |
| 276 | ||
| 277 | meta:set_string("infotext", "Switching Station. PR("..(PR_eu_supply+BA_eu_supply)..") RE("..(RE_eu_demand+BA_eu_demand)..")") | |
| 278 | ||
| 279 | -- If the PR supply is enough for the RE demand supply them all | |
| 280 | if PR_eu_supply >= RE_eu_demand then | |
| 281 | --dprint("PR_eu_supply"..PR_eu_supply.." >= RE_eu_demand"..RE_eu_demand) | |
| 282 | for _,pos1 in pairs(RE_nodes) do | |
| 283 | meta1 = minetest.env:get_meta(pos1) | |
| 284 | local eu_demand = meta1:get_int(eu_demand_str) | |
| 285 | meta1:set_int(eu_input_str, eu_demand) | |
| 286 | end | |
| 287 | -- We have a surplus, so distribute the rest equally to the BA nodes | |
| 288 | -- Let's calculate the factor of the demand | |
| 289 | PR_eu_supply = PR_eu_supply - RE_eu_demand | |
| 290 | local charge_factor = 0 -- Assume all batteries fully charged | |
| 291 | if BA_eu_demand > 0 then | |
| 292 | charge_factor = PR_eu_supply / BA_eu_demand | |
| 293 | end | |
| 294 | for n,pos1 in pairs(BA_nodes) do | |
| 295 | meta1 = minetest.env:get_meta(pos1) | |
| 296 | local eu_demand = meta1:get_int(eu_demand_str) | |
| 297 | meta1:set_int(eu_input_str, math.floor(eu_demand*charge_factor)) | |
| 298 | --dprint("Charging battery:"..math.floor(eu_demand*charge_factor)) | |
| 299 | end | |
| 300 | -- If still a surplus we can start giving back to the fuel burning generators | |
| 301 | -- Only full EU packages are given back. The rest is wasted. | |
| 302 | if BA_eu_demand == 0 then | |
| 303 | for _,pos1 in pairs(PR_nodes) do | |
| 304 | meta1 = minetest.env:get_meta(pos1) | |
| 305 | if meta1:get_int(eu_from_fuel_str) == 1 then | |
| 306 | local eu_supply = meta1:get_int(eu_supply_str) | |
| 307 | if PR_eu_supply < eu_supply then | |
| 308 | break | |
| 309 | else | |
| 310 | -- Set the supply to 0 if we did not require it. | |
| 311 | meta1:set_int(eu_supply_str, 0) | |
| 312 | PR_eu_supply = PR_eu_supply - eu_supply | |
| 313 | end | |
| 314 | end | |
| 315 | end | |
| 316 | end | |
| 317 | return | |
| 318 | end | |
| 319 | ||
| 320 | -- If the PR supply is not enough for the RE demand we will discharge the batteries too | |
| 321 | if PR_eu_supply+BA_eu_supply >= RE_eu_demand then | |
| 322 | --dprint("PR_eu_supply "..PR_eu_supply.."+BA_eu_supply "..BA_eu_supply.." >= RE_eu_demand"..RE_eu_demand) | |
| 323 | for _,pos1 in pairs(RE_nodes) do | |
| 324 | meta1 = minetest.env:get_meta(pos1) | |
| 325 | local eu_demand = meta1:get_int(eu_demand_str) | |
| 326 | meta1:set_int(eu_input_str, eu_demand) | |
| 327 | end | |
| 328 | -- We have a deficit, so distribute to the BA nodes | |
| 329 | -- Let's calculate the factor of the supply | |
| 330 | local charge_factor = 0 -- Assume all batteries depleted | |
| 331 | if BA_eu_supply > 0 then | |
| 332 | charge_factor = (PR_eu_supply - RE_eu_demand) / BA_eu_supply | |
| 333 | end | |
| 334 | for n,pos1 in pairs(BA_nodes) do | |
| 335 | meta1 = minetest.env:get_meta(pos1) | |
| 336 | local eu_supply = meta1:get_int(eu_supply_str) | |
| 337 | meta1:set_int(eu_input_str, math.floor(eu_supply*charge_factor)) | |
| 338 | --dprint("Discharging battery:"..math.floor(eu_supply*charge_factor)) | |
| 339 | end | |
| 340 | return | |
| 341 | end | |
| 342 | ||
| 343 | -- If the PR+BA supply is not enough for the RE demand: Shut everything down! | |
| 344 | -- Note: another behaviour could also be imagined: provide the average power for all and let the node decide what happens. | |
| 345 | -- This is much simpler though: Not enough power for all==no power for all | |
| 346 | --print("NO POWER") | |
| 347 | for _,pos1 in pairs(RE_nodes) do | |
| 348 | meta1 = minetest.env:get_meta(pos1) | |
| 349 | meta1:set_int(eu_input_str, 0) | |
| 350 | end | |
| 351 | end, | |
| 352 | }) | |
