-- SWITCHING STATION
|
-- The switching station is the center of all power distribution on an electric network.
|
-- The station will collect all produced power from producers (PR) and batteries (BA)
|
-- and distribute it to receivers (RE) and depleted batteries (BA).
|
--
|
-- It works like this:
|
-- All PR,BA,RE nodes are indexed and tagged with the switching station.
|
-- The tagging is to allow more stations to be built without allowing a cheat
|
-- with duplicating power.
|
-- All the RE nodes are queried for their current EU demand. Those which are off
|
-- would require no or a small standby EU demand, while those which are on would
|
-- require more.
|
-- If the total demand is less than the available power they are all updated with the
|
-- demand number.
|
-- If any surplus exists from the PR nodes the batteries will be charged evenly with this.
|
-- If the total demand requires draw on the batteries they will be discharged evenly.
|
--
|
-- If the total demand is more than the available power all RE nodes will be shut down.
|
-- We have a brown-out situation.
|
--
|
-- Hence all the power distribution logic resides in this single node.
|
--
|
-- Nodes connected to the network will have one or more of these parameters as meta data:
|
-- <LV|MV|HV>_EU_supply : Exists for PR and BA node types. This is the EU value supplied by the node. Output
|
-- <LV|MV|HV>_EU_demand : Exists for RE and BA node types. This is the EU value the node requires to run. Output
|
-- <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
|
--
|
-- The reason the LV|MV|HV type is prepended toe meta data is because some machine could require several supplies to work.
|
-- This way the supplies are separated per network.
|
technic.DBG = 1
|
local dprint = technic.dprint
|
|
minetest.register_craft({
|
output = "technic:switching_station",
|
recipe = {
|
{"default:steel_ingot", "technic:lv_transformer", "default:steel_ingot"},
|
{"default:copper_ingot", "technic:lv_cable0", "default:copper_ingot"},
|
{"default:steel_ingot", "technic:lv_cable0", "default:steel_ingot"}
|
}
|
})
|
|
minetest.register_node("technic:switching_station",{
|
description = "Switching Station",
|
tiles = {"technic_water_mill_top_active.png", "technic_water_mill_top_active.png",
|
"technic_water_mill_top_active.png", "technic_water_mill_top_active.png",
|
"technic_water_mill_top_active.png", "technic_water_mill_top_active.png"},
|
groups = {snappy=2, choppy=2, oddly_breakable_by_hand=2},
|
sounds = default.node_sound_wood_defaults(),
|
drawtype = "nodebox",
|
paramtype = "light",
|
node_box = {
|
type = "fixed",
|
fixed = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
|
},
|
on_construct = function(pos)
|
local meta = minetest.get_meta(pos)
|
meta:set_string("infotext", "Switching Station")
|
end,
|
})
|
|
--------------------------------------------------
|
-- Functions to help the machines on the electrical network
|
--------------------------------------------------
|
-- This one provides a timeout for a node in case it was disconnected from the network
|
-- A node must be touched by the station continuously in order to function
|
function technic.switching_station_timeout_count(pos, tier)
|
local meta = minetest.get_meta(pos)
|
timeout = meta:get_int(tier.."_EU_timeout")
|
if timeout == 0 then
|
meta:set_int(tier.."_EU_input", 0)
|
else
|
meta:set_int(tier.."_EU_timeout", timeout - 1)
|
end
|
end
|
|
--------------------------------------------------
|
-- Functions to traverse the electrical network
|
--------------------------------------------------
|
|
-- Add a wire node to the LV/MV/HV network
|
local add_new_cable_node = function(nodes, pos)
|
-- Ignore if the node has already been added
|
for i = 1, #nodes do
|
if pos.x == nodes[i].x and
|
pos.y == nodes[i].y and
|
pos.z == nodes[i].z then
|
return false
|
end
|
end
|
table.insert(nodes, {x=pos.x, y=pos.y, z=pos.z, visited=1})
|
return true
|
end
|
|
-- Generic function to add found connected nodes to the right classification array
|
local check_node_subp = function(PR_nodes, RE_nodes, BA_nodes, all_nodes, pos, machines, tier)
|
local meta = minetest.get_meta(pos)
|
local name = minetest.get_node(pos).name
|
|
if technic.is_tier_cable(name, tier) then
|
add_new_cable_node(all_nodes, pos)
|
elseif machines[name] then
|
--dprint(name.." is a "..machines[name])
|
if machines[name] == technic.producer then
|
add_new_cable_node(PR_nodes, pos)
|
elseif machines[name] == technic.receiver then
|
add_new_cable_node(RE_nodes, pos)
|
elseif machines[name] == technic.battery then
|
add_new_cable_node(BA_nodes, pos)
|
end
|
|
meta:set_int(tier.."_EU_timeout", 2) -- Touch node
|
end
|
end
|
|
-- Traverse a network given a list of machines and a cable type name
|
local traverse_network = function(PR_nodes, RE_nodes, BA_nodes, all_nodes, i, machines, tier)
|
local pos = all_nodes[i]
|
local positions = {
|
{x=pos.x+1, y=pos.y, z=pos.z},
|
{x=pos.x-1, y=pos.y, z=pos.z},
|
{x=pos.x, y=pos.y+1, z=pos.z},
|
{x=pos.x, y=pos.y-1, z=pos.z},
|
{x=pos.x, y=pos.y, z=pos.z+1},
|
{x=pos.x, y=pos.y, z=pos.z-1}}
|
--print("ON")
|
for i, cur_pos in pairs(positions) do
|
check_node_subp(PR_nodes, RE_nodes, BA_nodes, all_nodes, cur_pos, machines, tier)
|
end
|
end
|
|
local touch_nodes = function(list, tier)
|
for _, pos in ipairs(list) do
|
local meta = minetest.get_meta(pos)
|
meta:set_int(tier.."_EU_timeout", 2) -- Touch node
|
end
|
end
|
|
local get_network = function(pos1, tier)
|
local cached = technic.networks[pos1]
|
if cached and cached.tier == tier then
|
touch_nodes(cached.PR_nodes, tier)
|
touch_nodes(cached.BA_nodes, tier)
|
touch_nodes(cached.RE_nodes, tier)
|
return cached.PR_nodes, cached.BA_nodes, cached.RE_nodes
|
end
|
local i = 1
|
local PR_nodes = {}
|
local BA_nodes = {}
|
local RE_nodes = {}
|
local all_nodes = {pos1}
|
repeat
|
traverse_network(PR_nodes, RE_nodes, BA_nodes, all_nodes,
|
i, technic.machines[tier], tier)
|
i = i + 1
|
until all_nodes[i] == nil
|
technic.networks[pos1] = {tier = tier, PR_nodes = PR_nodes, RE_nodes = RE_nodes, BA_nodes = BA_nodes}
|
return PR_nodes, BA_nodes, RE_nodes
|
end
|
|
-----------------------------------------------
|
-- The action code for the switching station --
|
-----------------------------------------------
|
minetest.register_abm({
|
nodenames = {"technic:switching_station"},
|
interval = 1,
|
chance = 1,
|
action = function(pos, node, active_object_count, active_object_count_wider)
|
local meta = minetest.get_meta(pos)
|
local meta1 = nil
|
local pos1 = {}
|
local PR_EU = 0 -- EUs from PR nodes
|
local BA_PR_EU = 0 -- EUs from BA nodes (discharching)
|
local BA_RE_EU = 0 -- EUs to BA nodes (charging)
|
local RE_EU = 0 -- EUs to RE nodes
|
|
local tier = ""
|
local PR_nodes
|
local BA_nodes
|
local RE_nodes
|
|
-- Which kind of network are we on:
|
pos1 = {x=pos.x, y=pos.y-1, z=pos.z}
|
|
local name = minetest.get_node(pos1).name
|
local tier = technic.get_cable_tier(name)
|
if tier then
|
PR_nodes, RE_nodes, BA_nodes = get_network(pos1, tier)
|
else
|
--dprint("Not connected to a network")
|
meta:set_string("infotext", "Switching Station - no network")
|
return
|
end
|
--dprint("nodes="..table.getn(all_nodes)
|
-- .." PR="..table.getn(PR_nodes)
|
-- .." BA="..table.getn(BA_nodes)
|
-- .." RE="..table.getn(RE_nodes))
|
|
-- Strings for the meta data
|
local eu_demand_str = tier.."_EU_demand"
|
local eu_input_str = tier.."_EU_input"
|
local eu_supply_str = tier.."_EU_supply"
|
|
-- Get all the power from the PR nodes
|
local PR_eu_supply = 0 -- Total power
|
for _, pos1 in pairs(PR_nodes) do
|
meta1 = minetest.get_meta(pos1)
|
PR_eu_supply = PR_eu_supply + meta1:get_int(eu_supply_str)
|
end
|
--dprint("Total PR supply:"..PR_eu_supply)
|
|
-- Get all the demand from the RE nodes
|
local RE_eu_demand = 0
|
for _, pos1 in pairs(RE_nodes) do
|
meta1 = minetest.get_meta(pos1)
|
RE_eu_demand = RE_eu_demand + meta1:get_int(eu_demand_str)
|
end
|
--dprint("Total RE demand:"..RE_eu_demand)
|
|
-- Get all the power from the BA nodes
|
local BA_eu_supply = 0
|
for _, pos1 in pairs(BA_nodes) do
|
meta1 = minetest.get_meta(pos1)
|
BA_eu_supply = BA_eu_supply + meta1:get_int(eu_supply_str)
|
end
|
--dprint("Total BA supply:"..BA_eu_supply)
|
|
-- Get all the demand from the BA nodes
|
local BA_eu_demand = 0
|
for _, pos1 in pairs(BA_nodes) do
|
meta1 = minetest.get_meta(pos1)
|
BA_eu_demand = BA_eu_demand + meta1:get_int(eu_demand_str)
|
end
|
--dprint("Total BA demand:"..BA_eu_demand)
|
|
meta:set_string("infotext",
|
"Switching Station. Supply: "..PR_eu_supply
|
.." Demand: "..RE_eu_demand)
|
|
-- If the PR supply is enough for the RE demand supply them all
|
if PR_eu_supply >= RE_eu_demand then
|
--dprint("PR_eu_supply"..PR_eu_supply.." >= RE_eu_demand"..RE_eu_demand)
|
for _, pos1 in pairs(RE_nodes) do
|
meta1 = minetest.get_meta(pos1)
|
local eu_demand = meta1:get_int(eu_demand_str)
|
meta1:set_int(eu_input_str, eu_demand)
|
end
|
-- We have a surplus, so distribute the rest equally to the BA nodes
|
-- Let's calculate the factor of the demand
|
PR_eu_supply = PR_eu_supply - RE_eu_demand
|
local charge_factor = 0 -- Assume all batteries fully charged
|
if BA_eu_demand > 0 then
|
charge_factor = PR_eu_supply / BA_eu_demand
|
end
|
for n, pos1 in pairs(BA_nodes) do
|
meta1 = minetest.get_meta(pos1)
|
local eu_demand = meta1:get_int(eu_demand_str)
|
meta1:set_int(eu_input_str, math.floor(eu_demand * charge_factor))
|
--dprint("Charging battery:"..math.floor(eu_demand*charge_factor))
|
end
|
return
|
end
|
|
-- If the PR supply is not enough for the RE demand we will discharge the batteries too
|
if PR_eu_supply + BA_eu_supply >= RE_eu_demand then
|
--dprint("PR_eu_supply "..PR_eu_supply.."+BA_eu_supply "..BA_eu_supply.." >= RE_eu_demand"..RE_eu_demand)
|
for _, pos1 in pairs(RE_nodes) do
|
meta1 = minetest.get_meta(pos1)
|
local eu_demand = meta1:get_int(eu_demand_str)
|
meta1:set_int(eu_input_str, eu_demand)
|
end
|
-- We have a deficit, so distribute to the BA nodes
|
-- Let's calculate the factor of the supply
|
local charge_factor = 0 -- Assume all batteries depleted
|
if BA_eu_supply > 0 then
|
charge_factor = (PR_eu_supply - RE_eu_demand) / BA_eu_supply
|
end
|
for n,pos1 in pairs(BA_nodes) do
|
meta1 = minetest.get_meta(pos1)
|
local eu_supply = meta1:get_int(eu_supply_str)
|
meta1:set_int(eu_input_str, math.floor(eu_supply * charge_factor))
|
--dprint("Discharging battery:"..math.floor(eu_supply*charge_factor))
|
end
|
return
|
end
|
|
-- If the PR+BA supply is not enough for the RE demand: Power only the batteries
|
local charge_factor = 0 -- Assume all batteries fully charged
|
if BA_eu_demand > 0 then
|
charge_factor = PR_eu_supply / BA_eu_demand
|
end
|
for n, pos1 in pairs(BA_nodes) do
|
meta1 = minetest.get_meta(pos1)
|
local eu_demand = meta1:get_int(eu_demand_str)
|
meta1:set_int(eu_input_str, math.floor(eu_demand * charge_factor))
|
end
|
for n, pos1 in pairs(RE_nodes) do
|
meta1 = minetest.get_meta(pos1)
|
meta1:set_int(eu_input_str, 0)
|
end
|
end,
|
})
|
|
for tier, machines in pairs(technic.machines) do
|
-- SPECIAL will not be traversed
|
technic.register_machine(tier, "technic:switching_station", "SPECIAL")
|
end
|
