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Don't require a full network recalculation to add or remove a dead end

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A dead end (node with only one connection) can be simply added or removed from the network without needing to traverse the whole thing.
This commit is contained in:
Carter Kolwey 2017-03-11 00:57:52 -06:00
parent 9382558d82
commit c4acb7225a
1 changed files with 91 additions and 5 deletions
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96
technic/machines/register/cables.lua
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@ -11,7 +11,15 @@ function technic.get_cable_tier(name)
return cable_tier[name]
end
local function clear_networks(pos)
local function check_connections(pos)
-- Build a table of all machines
local machines = {}
for tier,list in pairs(technic.machines) do
for k,v in pairs(list) do
machines[k] = v
end
end
local connections = {}
local positions = {
{x=pos.x+1, y=pos.y, z=pos.z},
{x=pos.x-1, y=pos.y, z=pos.z},
@ -19,14 +27,92 @@ local function clear_networks(pos)
{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}}
for _,connected_pos in pairs(positions) do
local name = minetest.get_node(connected_pos).name
if machines[name] or technic.get_cable_tier(name) then
table.insert(connections,connected_pos)
end
end
return connections
end
local function clear_networks(pos)
local node = minetest.get_node(pos)
local meta = minetest.get_meta(pos)
local placed = node.name ~= "air"
local positions = check_connections(pos)
if #positions < 1 then return end
local dead_end = #positions == 1
for _,connected_pos in pairs(positions) do
local net = technic.cables[minetest.hash_node_position(connected_pos)]
if net and technic.networks[net] then
for _,v in pairs(technic.networks[net].all_nodes) do
local pos1 = minetest.hash_node_position(v)
technic.cables[pos1] = nil
if dead_end and placed then
-- Dead end placed, add it to the network
-- Get the network
local network_id = technic.cables[minetest.hash_node_position(positions[1])]
if not network_id then
-- We're evidently not on a network, nothing to add ourselves to
return
end
local sw_pos = minetest.get_position_from_hash(network_id)
sw_pos.y = sw_pos.y + 1
local network = technic.networks[network_id]
local tier = network.tier
-- Actually add it to the (cached) network
-- This is similar to check_node_subp
technic.cables[minetest.hash_node_position(pos)] = network_id
pos.visited = 1
if technic.is_tier_cable(name, tier) then
table.insert(network.all_nodes,pos)
elseif technic.machines[tier][node.name] then
meta:set_string(tier.."_network",minetest.pos_to_string(sw_pos))
if technic.machines[tier][node.name] == technic.producer then
table.insert(network.PR_nodes,pos)
elseif technic.machines[tier][node.name] == technic.receiver then
table.insert(network.RE_nodes,pos)
elseif technic.machines[tier][node.name] == technic.producer_receiver then
table.insert(network.PR_nodes,pos)
table.insert(network.RE_nodes,pos)
elseif technic.machines[tier][node.name] == "SPECIAL" and
(pos.x ~= sw_pos.x or pos.y ~= sw_pos.y or pos.z ~= sw_pos.z) and
from_below then
table.insert(network.SP_nodes,pos)
elseif technic.machines[tier][node.name] == technic.battery then
table.insert(network.BA_nodes,pos)
end
end
elseif dead_end and not placed then
-- Dead end removed, remove it from the network
-- Get the network
local network_id = technic.cables[minetest.hash_node_position(positions[1])]
if not network_id then
-- We're evidently not on a network, nothing to add ourselves to
return
end
local network = technic.networks[network_id]
-- Search for and remove machine
technic.cables[minetest.hash_node_position(pos)] = nil
for tblname,table in pairs(network) do
if tblname ~= "tier" then
for machinenum,machine in pairs(table) do
if machine.x == pos.x
and machine.y == pos.y
and machine.z == pos.z then
table[machinenum] = nil
end
end
end
end
else
-- Not a dead end, so the whole network needs to be recalculated
for _,v in pairs(technic.networks[net].all_nodes) do
local pos1 = minetest.hash_node_position(v)
technic.cables[pos1] = nil
end
technic.networks[net] = nil
end
technic.networks[net] = nil
end
end
end