ham_radio/receiver.lua
2019-12-08 20:27:24 +02:00

81 lines
2.7 KiB
Lua

minetest.register_tool("ham_radio:handheld_receiver", {
description = "Handheld Radio Receiver",
wield_image = "ham_radio_receiver_handheld.png",
inventory_image = "ham_radio_receiver_handheld.png",
groups = { disable_repair = 1 },
-- left click - change frequency
on_use = function(itemstack, user, pointed_thing)
local meta = itemstack:get_meta()
local frequency = meta:get_string("frequency")
minetest.show_formspec(user:get_player_name(), "ham_radio:configure_handheld_receiver",
table.concat({
"size[3,4]",
"image[1,0;1,1;ham_radio_receiver_handheld.png]",
"field[0.25,2;3,1;frequency;Frequency;",tostring(frequency),"]",
"tooltip[frequency;Integer number ",
ham_radio.settings.frequency.min,"-",
ham_radio.settings.frequency.max, "]",
"button_exit[0,3.5;3,1;;Done]"
},'')
)
return itemstack
end,
-- right click - RDS on/off
on_secondary_use = function(itemstack, user, pointed_thing)
local meta = itemstack:get_meta()
local is_rds_disabled = meta:get_string("rds_disabled")
if is_rds_disabled == "" then
meta:set_string("rds_disabled", "true")
else
meta:set_string("rds_disabled", "")
end
return itemstack
end
})
minetest.register_on_player_receive_fields(function(player, formname, fields)
if formname ~= "ham_radio:configure_handheld_receiver" or not minetest.is_player(player) then
return false
end
if not ham_radio.validate_frequency(fields.frequency) then
return false
end
local item = player:get_wielded_item()
local meta = item:get_meta()
meta:set_string("frequency", fields.frequency)
-- play radio sound
ham_radio.play_tuning_sound(player)
-- replace wielded item with new metadata
player:set_wielded_item(item)
-- reset rds messages
ham_radio.player_rds[player:get_player_name()] = nil
return true
end)
function ham_radio:locate_transmitter(player, transmitter_pos)
local player_pos = player:get_pos()
local player_look_vector = player:get_look_dir()
local player_direction = vector.add(player_pos, player_look_vector)
local coeff = 0.9
local distance_to_target = 0
local distance = vector.distance(player_pos, transmitter_pos)
if distance < 3 then
distance_to_target = 100
coeff = 0.99
else
distance_to_target = -0.0000000001*math.pow(distance,3)+0.00000145*math.pow(distance,2)-0.03*distance+100
if distance_to_target < 3 then
distance_to_target = 3
end
end
local distance2 = vector.distance(player_direction, transmitter_pos)
local signal_power = distance - distance2;
-- 0-100
return distance_to_target * coeff + distance_to_target * (1 - coeff) * signal_power;
end