314 lines
9.5 KiB
Lua
314 lines
9.5 KiB
Lua
-- Network graphs are built eminating from provider nodes.
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-- Network cache
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elefluid.graphcache = {nodes = {}}
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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 elefluid.graphcache.nodes[node_id] == "" then
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elefluid.graphcache.nodes[node_id] = pnodeid
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end
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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_duct_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(targets, all_nodes, pos, p_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, "elefluid_transport") then
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add_duct_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, "fluid_container") and
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not ele.helpers.get_item_group(node.name, "fluidity_tank") then
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return
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end
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add_node(targets, pos, pnodeid)
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end
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local function traverse_network(targets, all_nodes, pos, p_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(targets, all_nodes, cur_pos, p_pos, pnodeid, queue)
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end
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end
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local function fluid_targets(p_pos, pos)
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local provider = minetest.get_node(p_pos)
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local pnodeid = minetest.pos_to_string(p_pos)
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--[[
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if elefluid.graphcache[pnodeid] then
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local cached = elefluid.graphcache[pnodeid]
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return cached.targets
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end
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]]
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local targets = {}
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local queue = {}
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local all_nodes = {}
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local node = minetest.get_node(pos)
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if node and ele.helpers.get_item_group(node.name, "elefluid_transport") then
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add_duct_node(all_nodes, pos, pnodeid, queue)
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elseif node and (ele.helpers.get_item_group(node.name, "fluid_container") or
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ele.helpers.get_item_group(node.name, "fluidity_tank")) then
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queue = {p_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(targets, all_nodes, posi, p_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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local prov_id = minetest.hash_node_position(p_pos)
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elefluid.graphcache.nodes[prov_id] = pnodeid
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targets = ele.helpers.flatten(targets)
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all_nodes = ele.helpers.flatten(all_nodes)
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elefluid.graphcache[pnodeid] = {all_nodes = all_nodes, targets = targets}
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return targets
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end
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-----------------------
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-- Main Transfer ABM --
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-----------------------
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minetest.register_abm({
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nodenames = {"group:elefluid_transport_source"},
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label = "elefluidFluidGraphSource",
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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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local targets = {}
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-- Only allow the node directly behind to be a start of a network
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local tpos = vector.add(minetest.facedir_to_dir(node.param2), pos)
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local tname = minetest.get_node(tpos).name
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if not ele.helpers.get_item_group(tname, "elefluid_transport") and
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not ele.helpers.get_item_group(tname, "fluidity_tank") and
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not ele.helpers.get_item_group(tname, "fluid_container") then
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minetest.forceload_free_block(pos)
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return
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end
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-- Retrieve network
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minetest.forceload_block(pos)
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targets = fluid_targets(pos, tpos)
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-- No targets, don't proceed
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if #targets == 0 then
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return
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end
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-- Begin transfer
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local srcpos = ele.helpers.face_front(pos, node.param2)
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local srcnode = minetest.get_node(srcpos)
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-- Make sure source node is not air
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if not srcnode or srcnode.name == "air" then
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return
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end
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-- Make sure source node is a registered fluid container
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if not ele.helpers.get_item_group(srcnode.name, "fluid_container") and
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not ele.helpers.get_item_group(srcnode.name, "fluidity_tank") then
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return
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end
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local srcmeta = minetest.get_meta(srcpos)
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local srcdef = minetest.registered_nodes[srcnode.name]
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local buffers = fluid_lib.get_node_buffers(srcpos)
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if not buffers then return nil end
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-- Limit the amount of fluid pumped per cycle
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local pcapability = ele.helpers.get_node_property(meta, pos, "fluid_pump_capacity")
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local pumped = 0
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-- Transfer some fluid here
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for _,pos in pairs(targets) do
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if not vector.equals(pos, srcpos) then
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if pumped >= pcapability then break end
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local pp = fluid_lib.get_node_buffers(pos)
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local changed = false
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if pp ~= nil then
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for name in pairs(pp) do
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for bname in pairs(buffers) do
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if pumped >= pcapability then break end
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local buffer_data = fluid_lib.get_buffer_data(srcpos, bname)
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local target_data = fluid_lib.get_buffer_data(pos, name)
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if (target_data.fluid == buffer_data.fluid or target_data.fluid == "") and
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buffer_data.fluid ~= "" and buffer_data.amount > 0 and
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(buffer_data.drainable == nil or buffer_data.drainable == true) and
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fluid_lib.buffer_accepts_fluid(pos, name, buffer_data.fluid) then
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if fluid_lib.can_insert_into_buffer(pos, name, buffer_data.fluid, pcapability) > 0 then
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local res_f, count = fluid_lib.take_from_buffer(srcpos, bname, pcapability)
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if count > 0 then
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fluid_lib.insert_into_buffer(pos, name, res_f, count)
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pumped = pumped + count
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changed = true
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end
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end
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end
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end
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end
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end
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if changed then
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minetest.get_node_timer(srcpos):start(1.0)
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minetest.get_node_timer(pos):start(1.0)
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end
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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, "elefluid_transport") or
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ele.helpers.get_item_group(name, "elefluid_transport_source") or
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ele.helpers.get_item_group(name, "fluid_container") or
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ele.helpers.get_item_group(name, "fluidity_tank") 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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function elefluid.clear_networks(pos)
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return
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end
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--[[
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-- Update networks when a node has been placed or removed
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function elefluid.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 = elefluid.graphcache.nodes[minetest.hash_node_position(connected_pos)] or minetest.pos_to_string(connected_pos)
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if net and elefluid.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 = elefluid.graphcache.nodes[minetest.hash_node_position(positions[1])] or minetest.pos_to_string(positions[1])
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if not network_id or not elefluid.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 = elefluid.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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elefluid.graphcache.nodes[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, "elefluid_transport") 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, "fluid_container") or
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ele.helpers.get_item_group(name, "fluidity_tank") then
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table.insert(network.targets, pos)
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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 = elefluid.graphcache.nodes[minetest.hash_node_position(positions[1])] or minetest.pos_to_string(positions[1])
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if not network_id or not elefluid.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
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end
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local network = elefluid.graphcache[network_id]
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-- The network was deleted.
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if network_id == minetest.pos_to_string(pos) then
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for _,v in ipairs(network.all_nodes) do
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local pos1 = minetest.hash_node_position(v)
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clear_networks_from_node(v)
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elefluid.graphcache.nodes[pos1] = nil
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end
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elefluid.graphcache[network_id] = nil
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return
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end
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-- Search for and remove device
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elefluid.graphcache.nodes[minetest.hash_node_position(pos)] = nil
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for tblname,table in pairs(network) do
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if type(table) == "table" then
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for devicenum,device in pairs(table) do
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if vector.equals(device, pos) then
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table[devicenum] = nil
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end
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end
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end
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end
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else
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-- Not a dead end, so the whole network needs to be recalculated
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for _,v in ipairs(elefluid.graphcache[net].all_nodes) do
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local pos1 = minetest.hash_node_position(v)
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clear_networks_from_node(v)
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elefluid.graphcache.nodes[pos1] = nil
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end
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elefluid.graphcache[net] = nil
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end
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end
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end
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end
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]]
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