MoreMesecons/moremesecons_wireless/init.lua

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local wireless
local wireless_meta -- This table contains wireless metadatas, it is a lot faster to access
local jammers
local storage = minetest.get_mod_storage()
wireless = minetest.deserialize(storage:get_string("wireless")) or {}
wireless_meta = minetest.deserialize(storage:get_string("wireless_meta")) or {owners = {}, channels = {}, ids = {}}
jammers = minetest.deserialize(storage:get_string("jammers")) or {}
local function update_mod_storage()
storage:set_string("wireless", minetest.serialize(wireless))
storage:set_string("wireless_meta", minetest.serialize(wireless_meta))
storage:set_string("jammers", minetest.serialize(jammers))
end
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-- localize these functions with small names because they work fairly fast
local get = vector.get_data_from_pos
local set = vector.set_data_to_pos
local remove = vector.remove_data_from_pos
local function remove_wireless(pos)
local meta = minetest.get_meta(pos)
local owner = meta:get_string("owner")
if not owner then
return
end
if not wireless[owner] or not next(wireless[owner]) then
wireless[owner] = nil
return
end
local channel = meta:get_string("channel")
if channel == "" or not wireless[owner][channel] then
return
end
table.remove(wireless[owner][channel], meta:get_int("id"))
if #wireless[owner][channel] == 0 then
wireless[owner][channel] = nil
if not next(wireless[owner]) then
wireless[owner] = nil
end
end
remove(wireless_meta.owners, pos.z,pos.y,pos.x)
remove(wireless_meta.channels, pos.z,pos.y,pos.x)
remove(wireless_meta.ids, pos.z,pos.y,pos.x)
end
local set_channel
local function set_owner(pos, owner)
if not owner or owner == "" then
return
end
local meta = minetest.get_meta(pos)
meta:set_string("owner", owner)
set(wireless_meta.owners, pos.z,pos.y,pos.x, owner)
if not wireless[owner] then
wireless[owner] = {}
end
local channel = meta:get_string("channel")
if channel and channel ~= "" then
if not wireless[owner][channel] then
wireless[owner][channel] = {}
end
set_channel(pos, channel)
end
meta:set_string("infotext", "Wireless owned by " .. owner .. " on " .. ((channel and channel ~= "") and "channel " .. channel or "undefined channel"))
end
function set_channel(pos, channel)
if not channel or channel == "" then
return
end
local meta = minetest.get_meta(pos)
local owner = meta:get_string("owner")
if owner == "" then
return
end
local old_channel = meta:get_string("channel")
if old_channel and old_channel ~= channel then
remove_wireless(pos)
set_owner(pos, owner)
end
meta:set_string("channel", channel)
set(wireless_meta.channels, pos.z,pos.y,pos.x, channel)
if not wireless[owner] then
wireless[owner] = {}
end
if not wireless[owner][channel] then
wireless[owner][channel] = {}
end
table.insert(wireless[owner][channel], pos)
meta:set_int("id", #wireless[owner][channel])
set(wireless_meta.ids, pos.z,pos.y,pos.x, #wireless[owner][channel])
meta:set_string("infotext", "Wireless owned by " .. owner .. " on channel " .. channel)
end
local function register_wireless(pos)
local meta = minetest.get_meta(pos)
local owner = meta:get_string("owner")
if owner == "" then
return
end
set_owner(pos, owner)
local channel = meta:get_string("channel")
if channel ~= "" then
set_channel(pos, channel)
end
update_mod_storage()
end
local is_jammed
local function wireless_activate(pos)
if is_jammed(pos) then
-- jamming doesn't disallow receiving signals, only sending them
return
end
local channel = get(wireless_meta.channels, pos.z,pos.y,pos.x)
local owner = get(wireless_meta.owners, pos.z,pos.y,pos.x)
local id = get(wireless_meta.ids, pos.z,pos.y,pos.x)
if owner == "" or not wireless[owner] or channel == "" or not wireless[owner][channel] then
return
end
for i, wl_pos in ipairs(wireless[owner][channel]) do
if i ~= id then
mesecon.receptor_on(wl_pos)
end
end
end
local function wireless_deactivate(pos)
if is_jammed(pos) then
return
end
local channel = get(wireless_meta.channels, pos.z,pos.y,pos.x)
local owner = get(wireless_meta.owners, pos.z,pos.y,pos.x)
local id = get(wireless_meta.ids, pos.z,pos.y,pos.x)
if owner == "" or not wireless[owner] or channel == "" or not wireless[owner][channel] then
return
end
for i, wl_pos in ipairs(wireless[owner][channel]) do
if i ~= id then
mesecon.receptor_off(wl_pos)
end
end
end
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local function on_digiline_receive(pos, node, channel, msg)
local setchan = minetest.get_meta(pos):get_string("channel") -- Note : the digiline channel is the same as the wireless channel. TODO: Making two different channels and a more complex formspec ?
if channel ~= setchan or is_jammed(pos) or setchan == "" then
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return
end
local channel = get(wireless_meta.channels, pos.z,pos.y,pos.x)
local owner = get(wireless_meta.owners, pos.z,pos.y,pos.x)
local id = get(wireless_meta.ids, pos.z,pos.y,pos.x)
if owner == "" or not wireless[owner] or channel == "" or not wireless[owner][channel] then
return
end
for i, wl_pos in ipairs(wireless[owner][channel]) do
if i ~= id then
digiline:receptor_send(wl_pos, digiline.rules.default, channel, msg)
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end
end
end
minetest.register_node("moremesecons_wireless:wireless", {
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tiles = {"moremesecons_wireless.png"},
paramtype = "light",
paramtype2 = "facedir",
description = "Wireless",
walkable = true,
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groups = {cracky=3},
mesecons = {effector = {
action_on = wireless_activate,
action_off = wireless_deactivate
}},
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digiline = {
receptor = {},
effector = {
action = on_digiline_receive
},
},
sounds = default.node_sound_stone_defaults(),
on_construct = function(pos)
minetest.get_meta(pos):set_string("formspec", "field[channel;channel;${channel}]")
end,
on_destruct = function(pos)
remove_wireless(pos)
mesecon.receptor_off(pos)
end,
after_place_node = function(pos, placer)
local placername = placer:get_player_name()
set_owner(pos, placer:get_player_name())
update_mod_storage()
end,
on_receive_fields = function(pos, _, fields, player)
local meta = minetest.get_meta(pos)
local playername = player:get_player_name()
local owner = meta:get_string("owner")
if not owner or owner == "" then
-- Old wireless
if not minetest.is_protected(pos, playername) then
set_owner(pos, playername)
update_mod_storage()
else
return
end
end
if playername == owner then
set_channel(pos, fields.channel)
update_mod_storage()
end
end,
})
local jammers = {}
local function add_jammer(pos)
if get(jammers, pos.z,pos.y,pos.x) then
return
end
set(jammers, pos.z,pos.y,pos.x, true)
update_mod_storage()
end
local function remove_jammer(pos)
remove(jammers, pos.z,pos.y,pos.x)
update_mod_storage()
end
-- looks big, but should work fast
function is_jammed(pos)
local JAMMER_MAX_DISTANCE = moremesecons.setting("wireless", "jammer_max_distance", 15, 1)
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local pz,py,px = vector.unpack(pos)
for z,yxs in pairs(jammers) do
if math.abs(pz-z) <= JAMMER_MAX_DISTANCE then
for y,xs in pairs(yxs) do
if math.abs(py-y) <= JAMMER_MAX_DISTANCE then
for x in pairs(xs) do
if math.abs(px-x) <= JAMMER_MAX_DISTANCE
and (px-x)^2+(py-y)^2+(pz-z)^2 <= JAMMER_MAX_DISTANCE^2 then
return true
end
end
end
end
end
end
return false
end
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mesecon.register_node("moremesecons_wireless:jammer", {
description = "Wireless Jammer",
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paramtype = "light",
drawtype = "nodebox",
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},{
tiles = {"mesecons_wire_off.png^moremesecons_jammer_top.png", "moremesecons_jammer_bottom.png", "mesecons_wire_off.png^moremesecons_jammer_side_off.png"},
node_box = {
type = "fixed",
fixed = {
-- connection
{-1/16, -0.5, -0.5, 1/16, -7/16, 0.5},
{-0.5, -0.5, -1/16, 0.5, -7/16, 1/16},
--stabilization
{-1/16, -7/16, -1/16, 1/16, -6/16, 1/16},
-- fields
{-7/16, -6/16, -7/16, 7/16, -4/16, 7/16},
{-5/16, -4/16, -5/16, 5/16, -3/16, 5/16},
{-3/16, -3/16, -3/16, 3/16, -2/16, 3/16},
{-1/16, -2/16, -1/16, 1/16, -1/16, 1/16},
},
},
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groups = {dig_immediate=2},
mesecons = {effector = {
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rules = mesecon.rules.flat,
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action_on = function(pos)
add_jammer(pos)
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minetest.swap_node(pos, {name="moremesecons_wireless:jammer_on"})
end
}}
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},{
tiles = {"mesecons_wire_on.png^moremesecons_jammer_top.png", "moremesecons_jammer_bottom.png", "mesecons_wire_on.png^moremesecons_jammer_side_on.png"},
node_box = {
type = "fixed",
fixed = {
-- connection
{-1/16, -0.5, -0.5, 1/16, -7/16, 0.5},
{-0.5, -0.5, -1/16, 0.5, -7/16, 1/16},
--stabilization
{-1/16, -7/16, -1/16, 1/16, 5/16, 1/16},
-- fields
{-7/16, -6/16, -7/16, 7/16, -4/16, 7/16},
{-5/16, -3/16, -5/16, 5/16, -1/16, 5/16},
{-3/16, 0, -3/16, 3/16, 2/16, 3/16},
{-1/16, 3/16, -1/16, 1/16, 5/16, 1/16},
},
},
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groups = {dig_immediate=2, not_in_creative_inventory=1},
mesecons = {effector = {
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rules = mesecon.rules.flat,
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action_off = function(pos)
remove_jammer(pos)
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minetest.swap_node(pos, {name="moremesecons_wireless:jammer_off"})
end
}},
on_destruct = remove_jammer,
on_construct = add_jammer,
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})
minetest.register_craft({
output = "moremesecons_wireless:jammer_off",
recipe = {
{"moremesecons_wireless:wireless", "mesecons_torch:mesecon_torch_on", "moremesecons_wireless:wireless"}
}
})
minetest.register_craft({
output = "moremesecons_wireless:wireless 2",
recipe = {
{"group:mesecon_conductor_craftable", "", "group:mesecon_conductor_craftable"},
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{"", "mesecons_torch:mesecon_torch_on", ""},
{"group:mesecon_conductor_craftable", "", "group:mesecon_conductor_craftable"},
}
})
if moremesecons.setting("wireless", "enable_lbm", false) then
minetest.register_lbm({
name = "moremesecons_wireless:add_jammer",
nodenames = {"moremesecons_wireless:jammer_on"},
run_at_every_load = true,
action = add_jammer
})
minetest.register_lbm({
name = "moremesecons_wireless:add_wireless",
nodenames = {"moremesecons_wireless:wireless"},
run_at_every_load = true,
action = register_wireless
})
end
-- Legacy
if storage:get_string("wireless_rids") and storage:get_string("wireless_rids") ~= "" then
-- Upgrade mod storage!
local wireless_rids = minetest.deserialize(storage:get_string("wireless_rids"))
local old_wireless = table.copy(wireless)
wireless = {}
minetest.after(0, function(old_wireless)
-- After loading all mods, try to guess owners based on the areas mod database.
-- That won't work for all wireless. Owners of remaining wireless will be set
-- to the first player using their formspec.
if not areas then
return
end
for RID, pos in ipairs(old_wireless) do
local numerous_owners = false
local owner
for _, area in pairs(areas:getAreasAtPos(pos)) do
if owner and area.owner ~= owner then
numerous_owners = true
break
end
owner = area.owner
end
if not numerous_owners and owner then
set_owner(pos, owner)
set_channel(pos, minetest.get_meta(pos):get_string("channel"))
end
end
end, old_wireless)
-- Remove wireless_rids from storage
storage:from_table({
jammers = jammers,
wireless_meta = wireless_meta,
wireless = wireless
})
end