ham_radio/receiver.lua

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Lua
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2019-12-06 15:25:03 +01:00
-- minetest.chat_send_player(user:get_player_name(), "Itemstack"..meta:get_string("frequency").."^"..itemstack:get_name())
minetest.register_tool("ham_radio:receiver", {
description = "Ham Radio Receiver",
wield_image = "ham_radio_receiver_wield.png",
inventory_image = "ham_radio_receiver_wield.png",
groups = { disable_repair = 1 },
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_receiver",
"size[4,3]"..
"field[0.25,0.25;3,1;frequency;Frequency;"..tostring(frequency).."]"..
"button_exit[0.25,1.5;3,1;;Done]"
)
return itemstack
end,
})
minetest.register_on_player_receive_fields(function(player, formname, fields)
if formname ~= "ham_radio:configure_receiver" or not minetest.is_player(player) then
return false
end
if fields.frequency == "" or fields.frequency == nil then
return false
end
local item = player:get_wielded_item()
local meta = item:get_meta()
meta:set_string("frequency", fields.frequency)
player:set_wielded_item(item) -- replace wielded item with new metadata
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
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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
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local distance2 = vector.distance(player_direction, transmitter_pos)
local signal_power = distance - distance2;
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-- 0-100
return distance_to_target * coeff + distance_to_target * (1 - coeff) * signal_power;
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end