281 lines
9.7 KiB
Lua
281 lines
9.7 KiB
Lua
local networks = {}
|
|
local HARD_NETWORK_NODE_LIMIT = 1000 -- A network cannot consist of more than this many nodes
|
|
local CREATE_NETWORK_STATUS_OK = 0
|
|
local CREATE_NETWORK_STATUS_FAIL_OTHER_NETWORK = -1
|
|
local CREATE_NETWORK_STATUS_TOO_MANY_NODES = -2
|
|
|
|
local adjecent = {
|
|
vector.new( 1, 0, 0),
|
|
vector.new( 0, 1, 0),
|
|
vector.new( 0, 0, 1),
|
|
vector.new(-1, 0, 0),
|
|
vector.new( 0, -1, 0),
|
|
vector.new( 0, 0, -1),
|
|
}
|
|
|
|
function logistica.get_network_name_or_nil(pos)
|
|
local hash = minetest.hash_node_position(pos)
|
|
for nHash, network in pairs(networks) do
|
|
if hash == nHash then return network.name end
|
|
if network.cables[hash] then return network.name end
|
|
if network.machines[hash] then return network.name end
|
|
end
|
|
return nil
|
|
end
|
|
|
|
function logistica.get_network_or_nil(pos)
|
|
local hash = minetest.hash_node_position(pos)
|
|
for nHash, network in pairs(networks) do
|
|
if hash == nHash then return network end
|
|
if network.cables[hash] then return network end
|
|
if network.machines[hash] then return network end
|
|
end
|
|
return nil
|
|
end
|
|
|
|
function logistica.get_network_id_or_nil(pos)
|
|
local network = logistica.get_network_or_nil(pos)
|
|
if not network then return nil else return network.controller end
|
|
end
|
|
|
|
----------------------------------------------------------------
|
|
-- Network operation functions
|
|
----------------------------------------------------------------
|
|
|
|
local function dumb_remove_from_network(networkName, pos)
|
|
local network = networks[networkName]
|
|
if not network then return false end
|
|
local hashedPos = minetest.hash_node_position(pos)
|
|
if network.cables[hashedPos] then
|
|
network.cables[hashedPos] = nil
|
|
return true
|
|
end
|
|
if network.machines[hashedPos] then
|
|
network.machines[hashedPos] = nil
|
|
return true
|
|
end
|
|
if network.controller == hashedPos then
|
|
networks[networkName] = nil -- removing the controller removes the whole network
|
|
return true
|
|
end
|
|
return false
|
|
end
|
|
|
|
local function dumb_add_pos_to_network(networkName, pos)
|
|
local network = networks[networkName]
|
|
if not network then return false end
|
|
local node = minetest.get_node(pos)
|
|
local hashedPos = minetest.hash_node_position(pos)
|
|
if logistica.is_cable(node.name) then
|
|
network.cables[hashedPos] = true
|
|
elseif logistica.is_machine(node.name) then
|
|
network.machines[hashedPos] = true
|
|
else -- can't dumb-add a controller to a network
|
|
return false
|
|
end
|
|
return true
|
|
end
|
|
|
|
local function clear_network(networkName)
|
|
local network = networks[networkName]
|
|
if not network then return false end
|
|
networks[networkName] = nil
|
|
end
|
|
|
|
local function break_cable(pos)
|
|
local node = minetest.get_node_or_nil(pos)
|
|
if node and logistica.is_cable(node.name) then
|
|
logistica.swap_node(pos, node.name .. "_broken")
|
|
end
|
|
end
|
|
|
|
local function recursive_scan_for_nodes_for_controller(network, positions, numScanned)
|
|
if #positions <= 0 then return CREATE_NETWORK_STATUS_OK end
|
|
if not numScanned then numScanned = #positions
|
|
else numScanned = numScanned + #positions end
|
|
|
|
if numScanned > HARD_NETWORK_NODE_LIMIT then
|
|
return CREATE_NETWORK_STATUS_TOO_MANY_NODES
|
|
end
|
|
|
|
local connections = {}
|
|
for _, pos in pairs(positions) do
|
|
logistica.load_position(pos)
|
|
local tiers = logistica.get_item_tiers(minetest.get_node(pos).name)
|
|
local isAllTier = tiers[logistica.TIER_ALL] == true
|
|
for _, offset in pairs(adjecent) do
|
|
local otherPos = vector.add(pos, offset)
|
|
logistica.load_position(otherPos)
|
|
local otherHash = minetest.hash_node_position(otherPos)
|
|
local tiersMatch = isAllTier
|
|
if tiersMatch ~= true then
|
|
local otherTiers = logistica.get_item_tiers(minetest.get_node(otherPos).name)
|
|
tiersMatch = logistica.do_tiers_match(tiers, otherTiers)
|
|
end
|
|
if tiersMatch
|
|
and network.controller ~= otherHash
|
|
and network.machines[otherHash] == nil
|
|
and network.cables[otherHash] == nil then
|
|
local otherNode = minetest.get_node(otherPos)
|
|
if logistica.is_cable(otherNode.name) then
|
|
local existingNetwork = logistica.get_network_id_or_nil(otherPos)
|
|
if existingNetwork then
|
|
return CREATE_NETWORK_STATUS_FAIL_OTHER_NETWORK
|
|
else
|
|
network.cables[otherHash] = true
|
|
table.insert(connections, otherPos)
|
|
end
|
|
elseif logistica.is_demander(otherNode.name) then
|
|
network.machines[otherHash] = true
|
|
network.demanders[otherHash] = true
|
|
elseif logistica.is_supplier(otherNode.name) then
|
|
network.machines[otherHash] = true
|
|
network.suppliers[otherHash] = true
|
|
elseif logistica.is_storage(otherNode.name) then
|
|
network.machines[otherHash] = true
|
|
network.storage[otherHash] = true
|
|
end
|
|
end
|
|
end -- end inner for loop
|
|
end -- end outer for loop
|
|
-- We have nested loops so we can do tail recursion
|
|
return recursive_scan_for_nodes_for_controller(network, connections, numScanned)
|
|
end
|
|
|
|
local function add_network(controllerPosition)
|
|
local node = minetest.get_node(controllerPosition)
|
|
if not node.name:find("_controller") or not node.name:find("logistica:") then return false end
|
|
local meta = minetest.get_meta(controllerPosition)
|
|
local controllerHash = minetest.hash_node_position(controllerPosition)
|
|
local network = {}
|
|
local networkName = logistica.get_network_name_for(controllerPosition)
|
|
networks[controllerHash] = network
|
|
meta:set_string("infotext", "Controller of Network: "..networkName)
|
|
network.controller = controllerHash
|
|
network.name = networkName
|
|
network.machines = {}
|
|
network.cables = {}
|
|
network.demanders = {}
|
|
network.suppliers = {}
|
|
network.storage = {}
|
|
local status = recursive_scan_for_nodes_for_controller(network, {controllerPosition})
|
|
local errorMsg = nil
|
|
if status == CREATE_NETWORK_STATUS_FAIL_OTHER_NETWORK then
|
|
errorMsg = "Cannot connect to already existing network!"
|
|
logistica.swap_node(controllerPosition, node.name.."_disabled")
|
|
elseif status == CREATE_NETWORK_STATUS_TOO_MANY_NODES then
|
|
errorMsg = "Controller max nodes limit of "..HARD_NETWORK_NODE_LIMIT.." nodes per network exceeded!"
|
|
end
|
|
if errorMsg ~= nil then
|
|
networks[controllerHash] = nil
|
|
meta:set_string("infotext", "ERROR: "..errorMsg)
|
|
end
|
|
end
|
|
|
|
----------------------------------------------------------------
|
|
-- worker functions for cable/machine/controllers
|
|
----------------------------------------------------------------
|
|
|
|
local function rescan_network(networkName)
|
|
local network = networks[networkName]
|
|
if not network then return false end
|
|
if not network.controller then return false end
|
|
local conHash = network.controller
|
|
local controllerPosition = minetest.get_position_from_hash(conHash)
|
|
clear_network(networkName)
|
|
add_network(controllerPosition)
|
|
end
|
|
|
|
local function find_cable_connections(pos, node)
|
|
local connections = {}
|
|
for _, offset in pairs(adjecent) do
|
|
local otherPos = vector.add(pos, offset)
|
|
local otherNode = minetest.get_node_or_nil(otherPos)
|
|
if otherNode then
|
|
if otherNode.name == node.name then
|
|
table.insert(connections, otherPos)
|
|
elseif minetest.get_item_group(otherNode, logistica.GROUP_ALL) > 0 then
|
|
table.insert(connections, otherPos)
|
|
else -- check if adjecent node is a machine of same tier
|
|
local nodeTiers = logistica.get_item_tiers(node.name)
|
|
local otherTiers = logistica.get_item_tiers(otherNode.name)
|
|
if logistica.do_tiers_match(nodeTiers, otherTiers) then
|
|
table.insert(connections, otherPos)
|
|
end
|
|
end
|
|
end
|
|
end
|
|
return connections
|
|
end
|
|
|
|
local function try_to_add_network(pos)
|
|
add_network(pos)
|
|
end
|
|
|
|
local function find_machine_connections(pos, node)
|
|
|
|
end
|
|
|
|
----------------------------------------------------------------
|
|
-- global namespaced functions
|
|
----------------------------------------------------------------
|
|
|
|
function logistica.on_cable_change(pos, oldNode)
|
|
local node = oldNode or minetest.get_node(pos)
|
|
local meta = minetest.get_meta(pos)
|
|
local placed = (oldNode == nil) -- if oldNode is nil, we placed it
|
|
|
|
local connections = find_cable_connections(pos, node)
|
|
if not connections or #connections < 1 then return end -- nothing to update
|
|
local networkEnd = #connections == 1
|
|
|
|
if networkEnd then
|
|
if not placed then -- removed a network end
|
|
dumb_remove_from_network(pos)
|
|
else
|
|
local otherNode = minetest.get_node(connections[1])
|
|
if logistica.is_cable(otherNode.name) or logistica.is_controller(otherNode.name) then
|
|
local otherNetwork = logistica.get_network_id_or_nil(connections[1])
|
|
if otherNetwork then
|
|
dumb_add_pos_to_network(otherNetwork, pos)
|
|
end
|
|
end
|
|
end
|
|
return
|
|
end
|
|
|
|
-- We have more than 1 connected nodes - either cables or machines, something needs recalculating
|
|
local connectedNetworks = {}
|
|
for _, connectedPos in pairs(connections) do
|
|
local otherNetwork = logistica.get_network_id_or_nil(connectedPos)
|
|
if otherNetwork then
|
|
connectedNetworks[otherNetwork] = true
|
|
end
|
|
end
|
|
local firstNetwork = nil
|
|
local numNetworks = 0
|
|
for k,_ in pairs(connectedNetworks) do
|
|
numNetworks = numNetworks + 1
|
|
if firstNetwork == nil then firstNetwork = k end
|
|
end
|
|
if numNetworks <= 0 then return end -- still nothing to update
|
|
if numNetworks == 1 then
|
|
rescan_network(firstNetwork)
|
|
else
|
|
-- two or more connected networks (should only happen on place)
|
|
-- this cable can't work here, break it, and nothing to update
|
|
break_cable(pos)
|
|
end
|
|
end
|
|
|
|
function logistica.on_controller_change(pos, oldNode)
|
|
local node = oldNode or minetest.get_node(pos)
|
|
local meta = minetest.get_meta(pos)
|
|
local hashPos = minetest.hash_node_position(pos)
|
|
local placed = (oldNode == nil) -- if oldNode is nil, we placed a new one
|
|
if placed == true then
|
|
try_to_add_network(pos)
|
|
else
|
|
clear_network(hashPos)
|
|
end
|
|
end |