diff options
Diffstat (limited to 'teleport_tube.lua')
| -rw-r--r-- | teleport_tube.lua | 95 |
1 files changed, 53 insertions, 42 deletions
diff --git a/teleport_tube.lua b/teleport_tube.lua index 2f391f7..5c2a7de 100644 --- a/teleport_tube.lua +++ b/teleport_tube.lua @@ -1,6 +1,35 @@ local filename=minetest.get_worldpath() .. "/teleport_tubes" local tp_tube_db = nil -- nil forces a read +local tp_tube_db_version = 2.0 + +local function hash(pos) + return string.format("%d", minetest.hash_node_position(pos)) +end + +local function save_tube_db() + local file, err = io.open(filename, "w") + if file then + tp_tube_db.version = tp_tube_db_version + file:write(minetest.serialize(tp_tube_db)) + tp_tube_db.version = nil + io.close(file) + else + error(err) + end +end + +local function migrate_tube_db() + local tmp_db = {} + tp_tube_db.version = nil + for key, val in pairs(tp_tube_db) do + if(val.channel ~= "") then -- skip unconfigured tubes + tmp_db[hash(val)] = val + end + end + tp_tube_db = tmp_db + save_tube_db() +end local function read_tube_db() local file = io.open(filename, "r") @@ -10,50 +39,37 @@ local function read_tube_db() if file_content and file_content ~= "" then tp_tube_db = minetest.deserialize(file_content) - return tp_tube_db-- we read sucessfully + if(not tp_tube_db.version or tonumber(tp_tube_db.version) < tp_tube_db_version) then + migrate_tube_db() + end + tp_tube_db.version = nil -- we add it back when saving + return tp_tube_db -- we read sucessfully end end tp_tube_db = {} return tp_tube_db end -local function save_tube_db() - local file, err = io.open(filename, "w") - if file then - file:write(minetest.serialize(tp_tube_db)) - io.close(file) - else - error(err) - end -end - -- updates or adds a tube local function set_tube(pos, channel, can_receive) local tubes = tp_tube_db or read_tube_db() - for _, val in ipairs(tubes) do - if val.x == pos.x and val.y == pos.y and val.z == pos.z then - val.channel = channel - val.cr = can_receive - save_tube_db() - return - end + local hash = hash(pos) + local tube = tubes[hash] + if tube then + tube.channel = channel + tube.cr = can_receive + save_tube_db() + return end -- we haven't found any tp tube to update, so lets add it - table.insert(tp_tube_db,{x=pos.x,y=pos.y,z=pos.z,channel=channel,cr=can_receive}) + tp_tube_db[hash] = {x=pos.x,y=pos.y,z=pos.z,channel=channel,cr=can_receive} save_tube_db() end local function remove_tube(pos) local tubes = tp_tube_db or read_tube_db() - local newtbl = {} - for _, val in ipairs(tubes) do - if val.channel ~= "" -- remove also any empty channels when we stumble over them - and (val.x ~= pos.x or val.y ~= pos.y or val.z ~= pos.z) then - table.insert(newtbl, val) - end - end - tp_tube_db = newtbl + tubes[hash(pos)] = nil save_tube_db() end @@ -65,11 +81,11 @@ local function read_node_with_vm(pos) return minetest.get_name_from_content_id(data[area:index(pos.x, pos.y, pos.z)]) end -local function get_receivers(pos,channel) +local function get_receivers(pos, channel) local tubes = tp_tube_db or read_tube_db() local receivers = {} - local changed = false - for _, val in ipairs(tubes) do + local dirty = false + for key, val in pairs(tubes) do -- skip all non-receivers and the tube that it came from as early as possible, as this is called often if (val.cr == 1 and val.channel == channel and (val.x ~= pos.x or val.y ~= pos.y or val.z ~= pos.z)) then local is_loaded = (minetest.get_node_or_nil(val) ~= nil) @@ -78,19 +94,12 @@ local function get_receivers(pos,channel) if minetest.registered_nodes[node_name] and minetest.registered_nodes[node_name].is_teleport_tube then table.insert(receivers, val) else - val.to_remove = true - changed = true + tp_tube_db[key] = nil + dirty = true end end end - if changed then - local updated = {} - for _, val in ipairs(tubes) do - if not val.to_remove then - table.insert(updated, val) - end - end - tp_tube_db = updated + if dirty then save_tube_db() end return receivers @@ -121,11 +130,13 @@ pipeworks.register_tube("pipeworks:teleport_tube","Teleporting Pneumatic Tube Se velocity.x = 0 velocity.y = 0 velocity.z = 0 - local meta = minetest.get_meta(pos) - local channel = meta:get_string("channel") + + local channel = minetest.get_meta(pos):get_string("channel") if channel == "" then return {} end + local target = get_receivers(pos, channel) if target[1] == nil then return {} end + local d = math.random(1,#target) pos.x = target[d].x pos.y = target[d].y |