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-- Object detector
-- Detects players in a certain radius
-- The radius can be specified in mesecons/settings.lua
local object_detector_make_formspec = function (pos)
local meta = minetest.env: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}]")
end
local object_detector_on_receive_fields = function (pos, formname, fields)
local meta = minetest.env: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 object_detector_scan = function (pos)
local objs = minetest.env:get_objects_inside_radius(pos, OBJECT_DETECTOR_RADIUS)
for k, obj in pairs(objs) do
local isname = obj:get_player_name() -- "" is returned if it is not a player; "" ~= nil!
local scanname = minetest.env:get_meta(pos):get_string("scanname")
if (isname == scanname and isname ~= "") or (isname ~= "" and 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
object_detector_digiline = {
effector = {
action = function (pos, node, channel, msg)
local meta = minetest.env:get_meta(pos)
local active_channel = meta:get_string("digiline_channel")
if channel == active_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
}},
on_construct = object_detector_make_formspec,
on_receive_fields = object_detector_on_receive_fields,
digiline = object_detector_digiline
})
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
}},
on_construct = object_detector_make_formspec,
on_receive_fields = object_detector_on_receive_fields,
digiline = object_detector_digiline
})
minetest.register_craft({
output = 'mesecons_detector:object_detector_off',
recipe = {
{"default:steelblock", '', "default:steelblock"},
{"default:steelblock", "mesecons_microcontroller:microcontroller0000", "default:steelblock"},
{"default:steelblock", "group:mesecon_conductor_craftable", "default:steelblock"},
}
})
minetest.register_abm(
{nodenames = {"mesecons_detector:object_detector_off"},
interval = 1.0,
chance = 1,
action = function(pos)
if object_detector_scan(pos) then
mesecon:swap_node(pos, "mesecons_detector:object_detector_on")
mesecon:receptor_on(pos)
end
end,
})
minetest.register_abm(
{nodenames = {"mesecons_detector:object_detector_on"},
interval = 1.0,
chance = 1,
action = function(pos)
if not object_detector_scan(pos) then
mesecon:swap_node(pos, "mesecons_detector:object_detector_off")
mesecon:receptor_off(pos)
end
end,
})
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