MoreMesecons/moremesecons_adjustable_player_detector/init.lua

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-- Adjustable Player Detector
-- Detects players in a certain radius
-- The radius can be changes by right-click (by default 6)
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local function make_formspec(meta)
meta:set_string("formspec", "size[9,5]" ..
"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}]"..
"field[0.3,3;2,2;radius;Detection radius:;${radius}]"..
"button_exit[3.5,3.5;2,3;;Save]")
end
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local function object_detector_make_formspec(pos)
make_formspec(minetest.get_meta(pos))
end
local function object_detector_on_receive_fields(pos, formname, fields)
if not fields.scanname
or not fields.digiline_channel then
return
end
local meta = minetest.get_meta(pos)
meta:set_string("scanname", fields.scanname)
meta:set_string("digiline_channel", fields.digiline_channel)
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local r = tonumber(fields.radius)
if r then
meta:set_int("radius", r)
end
end
-- returns true if player was found, false if not
local object_detector_scan = function (pos)
local meta = minetest.get_meta(pos)
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local scanname = meta:get_string("scanname")
local scan_all = scanname == ""
local radius = meta:get_int("radius")
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if radius == 0 then
radius = 6
end
for _,obj in pairs(minetest.get_objects_inside_radius(pos, radius)) do
local isname = obj:get_player_name() -- "" is returned if it is not a player; "" ~= nil!
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if isname ~= ""
and (scan_all or isname == scanname) then -- player with scanname found or not scanname specified
return true
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)
local active_channel = meta:get_string("digiline_channel")
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if channel ~= active_channel then
return
end
meta:set_string("scanname", msg)
if meta:get_string("formspec") ~= "" then
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make_formspec(meta)
end
end,
}
}
minetest.register_node("moremesecons_adjustable_player_detector:player_detector_off", {
tiles = {"default_steel_block.png", "default_steel_block.png", "moremesecons_player_detector_off.png"},
paramtype = "light",
walkable = true,
groups = {cracky=3},
description="Adjustable 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(),
digiline = object_detector_digiline
})
minetest.register_node("moremesecons_adjustable_player_detector:player_detector_on", {
tiles = {"default_steel_block.png", "default_steel_block.png", "moremesecons_player_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(),
digiline = object_detector_digiline
})
minetest.register_craft({
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output = 'moremesecons_adjustable_player_detector:player_detector_off',
recipe = {
{"mesecons_detector:object_detector_off"},
{"default:mese_crystal_fragment"}
}
})
minetest.register_abm({
nodenames = {"moremesecons_adjustable_player_detector:player_detector_off"},
interval = 1.0,
chance = 1,
action = function(pos)
if object_detector_scan(pos) then
minetest.swap_node(pos, {name = "moremesecons_adjustable_player_detector:player_detector_on"})
mesecon.receptor_on(pos, mesecon.rules.pplate)
end
end,
})
minetest.register_abm({
nodenames = {"moremesecons_adjustable_player_detector:player_detector_on"},
interval = 1.0,
chance = 1,
action = function(pos)
if not object_detector_scan(pos) then
minetest.swap_node(pos, {name = "moremesecons_adjustable_player_detector:player_detector_off"})
mesecon.receptor_off(pos, mesecon.rules.pplate)
end
end,
})