mesecons/mesecons_detector/init.lua

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local GET_COMMAND = "GET"
-- Object detector
-- Detects players in a certain radius
-- The radius can be specified in mesecons/settings.lua
local function object_detector_make_formspec(pos)
local meta = minetest.get_meta(pos)
meta:set_string("formspec", "size[9,2.5]" ..
"field[0.3, 0;9,2;scanname;Name of player to scan for (empty for any):;${scanname}]"..
"field[0.3,1.5;4,2;digiline_channel;Digiline Channel (optional):;${digiline_channel}]"..
"button_exit[7,0.75;2,3;;Save]")
end
local function object_detector_on_receive_fields(pos, formname, fields, sender)
if not fields.scanname or not fields.digiline_channel then return end
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if minetest.is_protected(pos, sender:get_player_name()) then return end
local meta = minetest.get_meta(pos)
meta:set_string("scanname", fields.scanname)
meta:set_string("digiline_channel", fields.digiline_channel)
object_detector_make_formspec(pos)
end
-- returns true if player was found, false if not
local function object_detector_scan(pos)
local objs = minetest.get_objects_inside_radius(pos, mesecon.setting("detector_radius", 6))
-- abort if no scan results were found
if next(objs) == nil then return false end
local scanname = minetest.get_meta(pos):get_string("scanname")
local scan_for = {}
for _, str in pairs(string.split(scanname:gsub(" ", ""), ",")) do
scan_for[str] = true
end
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local every_player = scanname == ""
for _, obj in pairs(objs) do
-- "" is returned if it is not a player; "" ~= nil; so only handle objects with foundname ~= ""
local foundname = obj:get_player_name()
if foundname ~= "" then
if every_player or scan_for[foundname] then
return true
end
end
end
return false
end
-- set player name when receiving a digiline signal on a specific channel
local object_detector_digiline = {
effector = {
action = function(pos, node, channel, msg)
local meta = minetest.get_meta(pos)
if channel == meta:get_string("digiline_channel") then
meta:set_string("scanname", msg)
object_detector_make_formspec(pos)
end
end,
}
}
minetest.register_node("mesecons_detector:object_detector_off", {
tiles = {"default_steel_block.png", "default_steel_block.png", "jeija_object_detector_off.png", "jeija_object_detector_off.png", "jeija_object_detector_off.png", "jeija_object_detector_off.png"},
paramtype = "light",
walkable = true,
groups = {cracky=3},
description="Player Detector",
mesecons = {receptor = {
state = mesecon.state.off,
rules = mesecon.rules.pplate
}},
on_construct = object_detector_make_formspec,
on_receive_fields = object_detector_on_receive_fields,
sounds = default.node_sound_stone_defaults(),
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digiline = object_detector_digiline,
on_blast = mesecon.on_blastnode,
})
minetest.register_node("mesecons_detector:object_detector_on", {
tiles = {"default_steel_block.png", "default_steel_block.png", "jeija_object_detector_on.png", "jeija_object_detector_on.png", "jeija_object_detector_on.png", "jeija_object_detector_on.png"},
paramtype = "light",
walkable = true,
groups = {cracky=3,not_in_creative_inventory=1},
drop = 'mesecons_detector:object_detector_off',
mesecons = {receptor = {
state = mesecon.state.on,
rules = mesecon.rules.pplate
}},
on_construct = object_detector_make_formspec,
on_receive_fields = object_detector_on_receive_fields,
sounds = default.node_sound_stone_defaults(),
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digiline = object_detector_digiline,
on_blast = mesecon.on_blastnode,
})
minetest.register_craft({
output = 'mesecons_detector:object_detector_off',
recipe = {
{"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"},
{"default:steel_ingot", "mesecons_luacontroller:luacontroller0000", "default:steel_ingot"},
{"default:steel_ingot", "group:mesecon_conductor_craftable", "default:steel_ingot"},
}
})
minetest.register_abm({
nodenames = {"mesecons_detector:object_detector_off"},
interval = 1,
chance = 1,
action = function(pos, node)
if not object_detector_scan(pos) then return end
node.name = "mesecons_detector:object_detector_on"
minetest.swap_node(pos, node)
mesecon.receptor_on(pos, mesecon.rules.pplate)
end,
})
minetest.register_abm({
nodenames = {"mesecons_detector:object_detector_on"},
interval = 1,
chance = 1,
action = function(pos, node)
if object_detector_scan(pos) then return end
node.name = "mesecons_detector:object_detector_off"
minetest.swap_node(pos, node)
mesecon.receptor_off(pos, mesecon.rules.pplate)
end,
})
-- Node detector
-- Detects the node in front of it
local function node_detector_make_formspec(pos)
local meta = minetest.get_meta(pos)
if meta:get_string("distance") == "" then meta:set_string("distance", "0") end
meta:set_string("formspec", "size[9,2.5]" ..
"field[0.3, 0;9,2;scanname;Name of node to scan for (empty for any):;${scanname}]"..
"field[0.3,1.5;2.5,2;distance;Distance (0-"..mesecon.setting("node_detector_distance_max", 10).."):;${distance}]"..
"field[3,1.5;4,2;digiline_channel;Digiline Channel (optional):;${digiline_channel}]"..
"button_exit[7,0.75;2,3;;Save]")
end
local function node_detector_on_receive_fields(pos, fieldname, fields, sender)
if not fields.scanname or not fields.digiline_channel then return end
if minetest.is_protected(pos, sender:get_player_name()) then return end
local meta = minetest.get_meta(pos)
meta:set_string("scanname", fields.scanname)
meta:set_string("distance", fields.distance or "0")
meta:set_string("digiline_channel", fields.digiline_channel)
node_detector_make_formspec(pos)
end
-- returns true if node was found, false if not
local function node_detector_scan(pos)
local node = minetest.get_node_or_nil(pos)
if not node then return end
local meta = minetest.get_meta(pos)
local distance = meta:get_int("distance")
local distance_max = mesecon.setting("node_detector_distance_max", 10)
if distance < 0 then distance = 0 end
if distance > distance_max then distance = distance_max end
local frontname = minetest.get_node(
vector.subtract(pos, vector.multiply(minetest.facedir_to_dir(node.param2), distance + 1))
).name
local scanname = meta:get_string("scanname")
return (frontname == scanname) or
(frontname ~= "air" and frontname ~= "ignore" and scanname == "")
end
-- set player name when receiving a digiline signal on a specific channel
local node_detector_digiline = {
effector = {
action = function(pos, node, channel, msg)
local meta = minetest.get_meta(pos)
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local distance = meta:get_int("distance")
local distance_max = mesecon.setting("node_detector_distance_max", 10)
if distance < 0 then distance = 0 end
if distance > distance_max then distance = distance_max end
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if channel ~= meta:get_string("digiline_channel") then return end
if msg == GET_COMMAND then
local nodename = minetest.get_node(
vector.subtract(pos, vector.multiply(minetest.facedir_to_dir(node.param2), distance + 1))
).name
digiline:receptor_send(pos, digiline.rules.default, channel, nodename)
else
meta:set_string("scanname", msg)
node_detector_make_formspec(pos)
end
end,
},
receptor = {}
}
local function after_place_node_detector(pos, placer)
local placer_pos = placer:getpos()
if not placer_pos then
return
end
--correct for the player's height
if placer:is_player() then
placer_pos.y = placer_pos.y + 1.625
end
--correct for 6d facedir
local node = minetest.get_node(pos)
node.param2 = minetest.dir_to_facedir(vector.subtract(pos, placer_pos), true)
minetest.set_node(pos, node)
end
minetest.register_node("mesecons_detector:node_detector_off", {
tiles = {"default_steel_block.png", "default_steel_block.png", "default_steel_block.png", "default_steel_block.png", "default_steel_block.png", "jeija_node_detector_off.png"},
paramtype = "light",
paramtype2 = "facedir",
walkable = true,
groups = {cracky=3},
description="Node Detector",
mesecons = {receptor = {
state = mesecon.state.off
}},
on_construct = node_detector_make_formspec,
on_receive_fields = node_detector_on_receive_fields,
sounds = default.node_sound_stone_defaults(),
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digiline = node_detector_digiline,
on_blast = mesecon.on_blastnode,
})
minetest.register_node("mesecons_detector:node_detector_on", {
tiles = {"default_steel_block.png", "default_steel_block.png", "default_steel_block.png", "default_steel_block.png", "default_steel_block.png", "jeija_node_detector_on.png"},
paramtype = "light",
paramtype2 = "facedir",
walkable = true,
groups = {cracky=3,not_in_creative_inventory=1},
drop = 'mesecons_detector:node_detector_off',
mesecons = {receptor = {
state = mesecon.state.on
}},
on_construct = node_detector_make_formspec,
on_receive_fields = node_detector_on_receive_fields,
sounds = default.node_sound_stone_defaults(),
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digiline = node_detector_digiline,
on_blast = mesecon.on_blastnode,
})
minetest.register_craft({
output = 'mesecons_detector:node_detector_off',
recipe = {
{"default:steel_ingot", "group:mesecon_conductor_craftable", "default:steel_ingot"},
{"default:steel_ingot", "mesecons_luacontroller:luacontroller0000", "default:steel_ingot"},
{"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"},
}
})
minetest.register_abm({
nodenames = {"mesecons_detector:node_detector_off"},
interval = 1,
chance = 1,
action = function(pos, node)
if not node_detector_scan(pos) then return end
node.name = "mesecons_detector:node_detector_on"
minetest.swap_node(pos, node)
mesecon.receptor_on(pos)
end,
})
minetest.register_abm({
nodenames = {"mesecons_detector:node_detector_on"},
interval = 1,
chance = 1,
action = function(pos, node)
if node_detector_scan(pos) then return end
node.name = "mesecons_detector:node_detector_off"
minetest.swap_node(pos, node)
mesecon.receptor_off(pos)
end,
})