399 lines
11 KiB
Lua
399 lines
11 KiB
Lua
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-- Network graphs are built eminating from provider nodes.
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--[[
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TODO:
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Currently, there's a problem where storage nodes are allowed to create their own graph.
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When placing the storage onto a cable, it will add itself to the graph of that cable.
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But, when placing a cable onto the storage, that cable is added to the storage's own graph
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and thus cannot be connected to the previous graph.
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]]
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-- Network cache
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ele.graphcache = {devices = {}}
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---------------------
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-- Graph Functions --
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---------------------
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local function clear_networks_from_node(pos)
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local meta = minetest.get_meta(pos)
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meta:set_string("network_id", "")
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end
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local function add_node(nodes, pos, pnodeid)
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local node_id = minetest.hash_node_position(pos)
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if ele.graphcache.devices[node_id] and ele.graphcache.devices[node_id] ~= pnodeid then return end
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ele.graphcache.devices[node_id] = pnodeid
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if nodes[node_id] then
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return false
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end
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nodes[node_id] = pos
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return true
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end
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local function add_conductor_node(nodes, pos, pnodeid, queue)
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if add_node(nodes, pos, pnodeid) then
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queue[#queue + 1] = pos
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end
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end
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local function check_node(users, providers, all_nodes, pos, pr_pos, pnodeid, queue)
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ele.helpers.get_or_load_node(pos)
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local node = minetest.get_node(pos)
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local meta = minetest.get_meta(pos)
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if ele.helpers.get_item_group(node.name, "ele_conductor") then
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local nodedef = minetest.registered_nodes[node.name]
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local ptransfer = 0
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if nodedef.elepower_transfer then
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ptransfer = nodedef.elepower_transfer
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end
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add_conductor_node(all_nodes, pos, pnodeid, queue)
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return
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end
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if not ele.helpers.get_item_group(node.name, "ele_machine") then
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return
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end
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-- Don't add already networked nodes to this network
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if meta:get_string("network_id") ~= "" and meta:get_string("network_id") ~= pnodeid then
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return
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end
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meta:set_string("network_id", pnodeid)
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if ele.helpers.get_item_group(node.name, "ele_user") then
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add_node(users, pos, pnodeid)
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elseif ele.helpers.get_item_group(node.name, "ele_provider") then
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if ele.helpers.get_item_group(node.name, "ele_storage") then
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-- Storage gets added to users, for now
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add_node(users, pos, pnodeid)
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else
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add_node(providers, pos, pnodeid)
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end
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end
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end
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local function traverse_network(users, providers, all_nodes, pos, pr_pos, pnodeid, queue)
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local positions = {
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{x=pos.x+1, y=pos.y, z=pos.z},
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{x=pos.x-1, y=pos.y, z=pos.z},
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{x=pos.x, y=pos.y+1, z=pos.z},
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{x=pos.x, y=pos.y-1, z=pos.z},
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{x=pos.x, y=pos.y, z=pos.z+1},
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{x=pos.x, y=pos.y, z=pos.z-1}}
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for _, cur_pos in pairs(positions) do
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check_node(users, providers, all_nodes, cur_pos, pr_pos, pnodeid, queue)
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end
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end
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local function power_networks(pr_pos, positions)
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local provider = minetest.get_node(pr_pos)
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local pnodeid = minetest.pos_to_string(pr_pos)
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if ele.graphcache[pnodeid] then
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local cached = ele.graphcache[pnodeid]
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return cached.users, cached.providers
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end
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local users = {}
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local providers = {}
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local queue = {}
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local all_nodes = {}
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for pos in pairs(positions) do
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queue = {}
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local node = minetest.get_node(pos)
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if node and ele.helpers.get_item_group(node.name, "ele_conductor") then
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add_conductor_node(all_nodes, pos, pnodeid, queue)
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elseif node and ele.helpers.get_item_group(node.name, "ele_machine") then
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queue = {pr_pos}
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end
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while next(queue) do
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local to_visit = {}
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for _, posi in ipairs(queue) do
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traverse_network(users, providers, all_nodes, posi, pr_pos, pnodeid, to_visit)
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end
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queue = to_visit
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end
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end
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-- Add self to providers
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local prov_id = minetest.hash_node_position(pr_pos)
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ele.graphcache.devices[prov_id] = pnodeid
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providers[prov_id] = pr_pos
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users = ele.helpers.flatten(users)
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providers = ele.helpers.flatten(providers)
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all_nodes = ele.helpers.flatten(all_nodes)
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ele.graphcache[pnodeid] = {all_nodes = all_nodes, users = users, providers = providers}
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return users, providers
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end
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-----------------------
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-- Main Transfer ABM --
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-----------------------
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local function give_node_power(pos, available)
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local user_meta = minetest.get_meta(pos)
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local capacity = ele.helpers.get_node_property(user_meta, pos, "capacity")
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local inrush = ele.helpers.get_node_property(user_meta, pos, "inrush")
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local storage = user_meta:get_int("storage")
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local total_add = 0
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if available >= inrush then
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total_add = inrush
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elseif available < inrush then
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total_add = inrush - available
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end
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if total_add + storage > capacity then
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total_add = (total_add + storage) - capacity
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end
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if storage >= capacity then
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total_add = 0
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storage = capacity
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end
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return total_add, storage
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end
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minetest.register_abm({
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nodenames = {"group:ele_provider"},
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label = "elepowerPowerGraphSource",
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interval = 1,
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chance = 1,
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action = function(pos, node, active_object_count, active_object_count_wider)
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local meta = minetest.get_meta(pos)
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local meta1 = nil
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-- Check if a provider is attached to a network.
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-- If that network has been abolished, we will use this node as the network's root this time.
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local netwrkto = meta:get_string("ele_network")
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if netwrkto ~= "" and netwrkto ~= nil then
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if not ele.helpers.get_item_group(node.name, "ele_storage") then
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local lpos = minetest.string_to_pos(netwrkto)
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if ele.helpers.get_item_group(minetest.get_node(lpos).name, "ele_provider") then
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return
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else
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ele.graphcache[netwrkto] = nil
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end
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meta:set_string("ele_network", "")
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end
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end
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local users = {}
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local providers = {}
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local providerdef = minetest.registered_nodes[node.name]
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-- TODO: Customizable output sides
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local positions = {
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{x=pos.x, y=pos.y-1, z=pos.z},
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{x=pos.x, y=pos.y+1, z=pos.z},
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{x=pos.x-1, y=pos.y, z=pos.z},
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{x=pos.x+1, y=pos.y, z=pos.z},
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{x=pos.x, y=pos.y, z=pos.z-1},
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{x=pos.x, y=pos.y, z=pos.z+1}
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}
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local ntwks = {}
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local errored = false
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local nw_branches = 0
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for _,pos1 in pairs(positions) do
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local name = node.name
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local networked = ele.helpers.get_item_group(name, "ele_machine") or ele.helpers.get_item_group(name, "ele_conductor")
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if networked then
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ntwks[pos1] = true
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nw_branches = nw_branches + 1
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end
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end
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if errored then
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return
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end
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if nw_branches == 0 then
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minetest.forceload_free_block(pos)
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return
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else
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minetest.forceload_block(pos)
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end
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users, providers = power_networks(pos, ntwks)
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-- Calculate power data
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local pw_supply = 0
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local pw_demand = 0
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for _, spos in ipairs(providers) do
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local smeta = minetest.get_meta(spos)
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local pw_storage = smeta:get_int("storage")
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local p_output = ele.helpers.get_node_property(smeta, spos, "output")
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if p_output and pw_storage >= p_output then
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pw_supply = pw_supply + p_output
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elseif p_output and pw_storage < p_output then
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pw_supply = pw_supply + pw_storage
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end
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end
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-- Give power to users
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for _,ndv in ipairs(users) do
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if pw_demand >= pw_supply then
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break
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end
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local user_gets, user_storage = give_node_power(ndv, pw_supply - pw_demand)
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pw_demand = pw_demand + user_gets
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local user_meta = minetest.get_meta(ndv)
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user_meta:set_int("storage", user_storage + user_gets)
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if user_gets > 0 then
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-- Set timer on this node
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local t = minetest.get_node_timer(ndv)
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if not t:is_started() then
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t:start(1.0)
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end
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end
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end
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-- Take the power from a provider node
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if pw_demand > 0 then
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for _, spos in ipairs(providers) do
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local smeta = minetest.get_meta(spos)
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local pw_storage = smeta:get_int("storage")
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if pw_storage >= pw_demand then
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smeta:set_int("storage", pw_storage - pw_demand)
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else
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pw_demand = pw_demand - pw_storage
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smeta:set_int("storage", 0)
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end
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minetest.get_node_timer(spos):start(1.0)
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end
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end
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end,
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})
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local function check_connections(pos)
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local connections = {}
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local positions = {
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{x=pos.x+1, y=pos.y, z=pos.z},
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{x=pos.x-1, y=pos.y, z=pos.z},
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{x=pos.x, y=pos.y+1, z=pos.z},
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{x=pos.x, y=pos.y-1, z=pos.z},
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{x=pos.x, y=pos.y, z=pos.z+1},
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{x=pos.x, y=pos.y, z=pos.z-1}}
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for _,connected_pos in pairs(positions) do
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local name = minetest.get_node(connected_pos).name
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if ele.helpers.get_item_group(name, "ele_conductor") or ele.helpers.get_item_group(name, "ele_machine") then
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table.insert(connections, connected_pos)
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end
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end
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return connections
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end
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-- Update networks when a node has been placed or removed
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function ele.clear_networks(pos)
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local node = minetest.get_node(pos)
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local meta = minetest.get_meta(pos)
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local name = node.name
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local placed = name ~= "air"
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local positions = check_connections(pos)
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if #positions < 1 then return end
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local dead_end = #positions == 1
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for _,connected_pos in pairs(positions) do
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local net = ele.graphcache.devices[minetest.hash_node_position(connected_pos)] or minetest.pos_to_string(connected_pos)
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if net and ele.graphcache[net] then
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if dead_end and placed then
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-- Dead end placed, add it to the network
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-- Get the network
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local node_at = minetest.get_node(positions[1])
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local network_id = ele.graphcache.devices[minetest.hash_node_position(positions[1])] or minetest.pos_to_string(positions[1])
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if not network_id or not ele.graphcache[network_id] then
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-- We're evidently not on a network, nothing to add ourselves to
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return
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end
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local c_pos = minetest.string_to_pos(network_id)
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local network = ele.graphcache[network_id]
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-- Actually add it to the (cached) network
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-- This is similar to check_node_subp
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ele.graphcache.devices[minetest.hash_node_position(pos)] = network_id
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pos.visited = 1
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if ele.helpers.get_item_group(name, "ele_conductor") then
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table.insert(network.all_nodes, pos)
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end
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if ele.helpers.get_item_group(name, "ele_machine") then
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meta:set_string("ele_network", network_id)
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if ele.helpers.get_item_group(name, "ele_provider") then
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if ele.helpers.get_item_group(name, "ele_storage") then
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-- TODO: Add storage to users for now
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table.insert(network.users, pos)
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else
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table.insert(network.providers, pos)
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end
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elseif ele.helpers.get_item_group(name, "ele_user") then
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table.insert(network.users, pos)
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end
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end
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elseif dead_end and not placed then
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-- Dead end removed, remove it from the network
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-- Get the network
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local network_id = ele.graphcache.devices[minetest.hash_node_position(positions[1])] or minetest.pos_to_string(positions[1])
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if not network_id or not ele.graphcache[network_id] then
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-- We're evidently not on a network, nothing to remove ourselves from
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return
|
||
|
|
end
|
||
|
|
local network = ele.graphcache[network_id]
|
||
|
|
|
||
|
|
-- The network was deleted.
|
||
|
|
if network_id == minetest.pos_to_string(pos) then
|
||
|
|
for _,v in pairs(network.all_nodes) do
|
||
|
|
local pos1 = minetest.hash_node_position(v)
|
||
|
|
clear_networks_from_node(v)
|
||
|
|
ele.graphcache.devices[pos1] = nil
|
||
|
|
end
|
||
|
|
ele.graphcache[network_id] = nil
|
||
|
|
return
|
||
|
|
end
|
||
|
|
|
||
|
|
-- Search for and remove device
|
||
|
|
ele.graphcache.devices[minetest.hash_node_position(pos)] = nil
|
||
|
|
for tblname,table in pairs(network) do
|
||
|
|
if type(table) == "table" then
|
||
|
|
for devicenum,device in pairs(table) do
|
||
|
|
if vector.equals(device, pos) then
|
||
|
|
table[devicenum] = nil
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
else
|
||
|
|
-- Not a dead end, so the whole network needs to be recalculated
|
||
|
|
for _,v in pairs(ele.graphcache[net].all_nodes) do
|
||
|
|
local pos1 = minetest.hash_node_position(v)
|
||
|
|
clear_networks_from_node(v)
|
||
|
|
ele.graphcache.devices[pos1] = nil
|
||
|
|
end
|
||
|
|
ele.graphcache[net] = nil
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|