MoreMesecons/moremesecons_wireless/init.lua

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local JAMMER_MAX_DISTANCE = 15
local wireless = {}
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local wireless_rids = {}
-- 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
-- if the wireless at pos isn't stored yet, put it into the tables
local function register_RID(pos)
if get(wireless_rids, pos.z,pos.y,pos.x) then
return
end
local RID = #wireless+1
wireless[RID] = pos
set(wireless_rids, pos.z,pos.y,pos.x, RID)
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_first_wireless = minetest.get_meta(pos):get_string("channel")
for i = 1, #wireless do
if not vector.equals(wireless[i], pos)
and minetest.get_meta(wireless[i]):get_string("channel") == channel_first_wireless then
mesecon.receptor_on(wireless[i])
end
end
end
local function wireless_deactivate(pos)
if is_jammed(pos) then
return
end
local channel_first_wireless = minetest.get_meta(pos):get_string("channel")
for i = 1, #wireless do
if not vector.equals(wireless[i], pos)
and minetest.get_meta(wireless[i]):get_string("channel") == channel_first_wireless then
mesecon.receptor_off(wireless[i])
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
}},
sounds = default.node_sound_stone_defaults(),
on_construct = function(pos)
local meta = minetest.get_meta(pos)
meta:set_string("formspec", "field[channel;channel;${channel}]")
register_RID(pos)
end,
on_destruct = function(pos)
local RID = get(wireless_rids, pos.z,pos.y,pos.x)
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if RID then
table.remove(wireless, RID)
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vector.remove_data_from_pos(wireless_rids, pos.z,pos.y,pos.x)
end
mesecon.receptor_off(pos)
end,
on_receive_fields = function(pos, formname, fields, sender)
local meta = minetest.get_meta(pos)
meta:set_string("channel", fields.channel)
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)
end
local function remove_jammer(pos)
remove(jammers, pos.z,pos.y,pos.x)
end
-- looks big, but should work fast
function is_jammed(pos)
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 = {
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 = {
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"},
}
})
minetest.register_abm({
nodenames = {"moremesecons_wireless:jammer_on"},
interval = 5,
chance = 1,
catch_up = false,
action = add_jammer
})
minetest.register_abm({
nodenames = {"moremesecons_wireless:wireless"},
interval = 5,
chance = 1,
catch_up = false,
action = register_RID
})