minetest_game/mods/fire/init.lua

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-- fire/init.lua
-- Global namespace for functions
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fire = {}
-- Load support for MT game translation.
local S = minetest.get_translator("fire")
-- 'Enable fire' setting
local fire_enabled = minetest.settings:get_bool("enable_fire")
if fire_enabled == nil then
-- enable_fire setting not specified, check for disable_fire
local fire_disabled = minetest.settings:get_bool("disable_fire")
if fire_disabled == nil then
-- Neither setting specified, check whether singleplayer
fire_enabled = minetest.is_singleplayer()
else
fire_enabled = not fire_disabled
end
end
--
-- Items
--
-- Flood flame function
local function flood_flame(pos, _, newnode)
-- Play flame extinguish sound if liquid is not an 'igniter'
if minetest.get_item_group(newnode.name, "igniter") == 0 then
minetest.sound_play("fire_extinguish_flame",
{pos = pos, max_hear_distance = 16, gain = 0.15}, true)
end
-- Remove the flame
return false
end
-- Flame nodes
local fire_node = {
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drawtype = "firelike",
tiles = {{
name = "fire_basic_flame_animated.png",
animation = {
type = "vertical_frames",
aspect_w = 16,
aspect_h = 16,
length = 1
}}
},
inventory_image = "fire_basic_flame.png",
paramtype = "light",
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light_source = 13,
walkable = false,
buildable_to = true,
sunlight_propagates = true,
floodable = true,
damage_per_second = 4,
groups = {igniter = 2, dig_immediate = 3, fire = 1},
drop = "",
on_flood = flood_flame
}
-- Basic flame node
local flame_fire_node = table.copy(fire_node)
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flame_fire_node.description = S("Fire")
flame_fire_node.groups.not_in_creative_inventory = 1
flame_fire_node.on_timer = function(pos)
if not minetest.find_node_near(pos, 1, {"group:flammable"}) then
minetest.remove_node(pos)
return
end
-- Restart timer
return true
end
flame_fire_node.on_construct = function(pos)
minetest.get_node_timer(pos):start(math.random(30, 60))
end
minetest.register_node("fire:basic_flame", flame_fire_node)
-- Permanent flame node
local permanent_fire_node = table.copy(fire_node)
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permanent_fire_node.description = S("Permanent Fire")
minetest.register_node("fire:permanent_flame", permanent_fire_node)
-- Flint and Steel
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minetest.register_tool("fire:flint_and_steel", {
description = S("Flint and Steel"),
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inventory_image = "fire_flint_steel.png",
sound = {breaks = "default_tool_breaks"},
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on_use = function(itemstack, user, pointed_thing)
local sound_pos = pointed_thing.above or user:get_pos()
minetest.sound_play("fire_flint_and_steel",
{pos = sound_pos, gain = 0.2, max_hear_distance = 8}, true)
local player_name = user:get_player_name()
if pointed_thing.type == "node" then
local node_under = minetest.get_node(pointed_thing.under).name
local nodedef = minetest.registered_nodes[node_under]
if not nodedef then
return
end
if minetest.is_protected(pointed_thing.under, player_name) then
minetest.chat_send_player(player_name, "This area is protected")
return
end
if nodedef.on_ignite then
nodedef.on_ignite(pointed_thing.under, user)
elseif minetest.get_item_group(node_under, "flammable") >= 1
and minetest.get_node(pointed_thing.above).name == "air" then
minetest.set_node(pointed_thing.above, {name = "fire:basic_flame"})
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end
end
if not minetest.is_creative_enabled(player_name) then
-- Wear tool
local wdef = itemstack:get_definition()
itemstack:add_wear_by_uses(66)
-- Tool break sound
if itemstack:get_count() == 0 and wdef.sound and wdef.sound.breaks then
minetest.sound_play(wdef.sound.breaks,
{pos = sound_pos, gain = 0.5}, true)
end
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return itemstack
end
end
})
minetest.register_craft({
output = "fire:flint_and_steel",
recipe = {
{"default:flint", "default:steel_ingot"}
}
})
-- Override coalblock to enable permanent flame above
-- Coalblock is non-flammable to avoid unwanted basic_flame nodes
minetest.override_item("default:coalblock", {
after_destruct = function(pos)
pos.y = pos.y + 1
if minetest.get_node(pos).name == "fire:permanent_flame" then
minetest.remove_node(pos)
end
end,
on_ignite = function(pos)
local flame_pos = {x = pos.x, y = pos.y + 1, z = pos.z}
if minetest.get_node(flame_pos).name == "air" then
minetest.set_node(flame_pos, {name = "fire:permanent_flame"})
end
end
})
--
-- Sound
--
-- Enable if no setting present
local flame_sound = minetest.settings:get_bool("flame_sound", true)
if flame_sound then
local handles = {}
local timer = 0
-- Parameters
local radius = 8 -- Flame node search radius around player
local cycle = 3 -- Cycle time for sound updates
-- Update sound for player
function fire.update_player_sound(player)
local player_name = player:get_player_name()
-- Search for flame nodes in radius around player
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local ppos = player:get_pos()
local areamin = vector.subtract(ppos, radius)
local areamax = vector.add(ppos, radius)
local fpos, num = minetest.find_nodes_in_area(
areamin,
areamax,
{"fire:basic_flame", "fire:permanent_flame"}
)
-- Total number of flames in radius
local flames = (num["fire:basic_flame"] or 0) +
(num["fire:permanent_flame"] or 0)
-- Stop previous sound
if handles[player_name] then
minetest.sound_stop(handles[player_name])
handles[player_name] = nil
end
-- If flames
if flames > 0 then
-- Find centre of flame positions
local fposmid = fpos[1]
-- If more than 1 flame
if #fpos > 1 then
local fposmin = areamax
local fposmax = areamin
for i = 1, #fpos do
local fposi = fpos[i]
if fposi.x > fposmax.x then
fposmax.x = fposi.x
end
if fposi.y > fposmax.y then
fposmax.y = fposi.y
end
if fposi.z > fposmax.z then
fposmax.z = fposi.z
end
if fposi.x < fposmin.x then
fposmin.x = fposi.x
end
if fposi.y < fposmin.y then
fposmin.y = fposi.y
end
if fposi.z < fposmin.z then
fposmin.z = fposi.z
end
end
fposmid = vector.divide(vector.add(fposmin, fposmax), 2)
end
-- Play sound
local handle = minetest.sound_play("fire_fire", {
pos = fposmid,
to_player = player_name,
gain = math.min(0.06 * (1 + flames * 0.125), 0.18),
max_hear_distance = 32,
loop = true -- In case of lag
})
-- Store sound handle for this player
if handle then
handles[player_name] = handle
end
end
end
-- Cycle for updating players sounds
minetest.register_globalstep(function(dtime)
timer = timer + dtime
if timer < cycle then
return
end
timer = 0
local players = minetest.get_connected_players()
for n = 1, #players do
fire.update_player_sound(players[n])
end
end)
-- Stop sound and clear handle on player leave
minetest.register_on_leaveplayer(function(player)
local player_name = player:get_player_name()
if handles[player_name] then
minetest.sound_stop(handles[player_name])
handles[player_name] = nil
end
end)
end
-- Deprecated function kept temporarily to avoid crashes if mod fire nodes call it
function fire.update_sounds_around() end
--
-- ABMs
--
if fire_enabled then
-- Ignite neighboring nodes, add basic flames
minetest.register_abm({
label = "Ignite flame",
nodenames = {"group:flammable"},
neighbors = {"group:igniter"},
interval = 7,
chance = 12,
catch_up = false,
action = function(pos)
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local p = minetest.find_node_near(pos, 1, {"air"})
if p then
minetest.set_node(p, {name = "fire:basic_flame"})
end
end
})
-- Remove flammable nodes around basic flame
minetest.register_abm({
label = "Remove flammable nodes",
nodenames = {"fire:basic_flame"},
neighbors = "group:flammable",
interval = 5,
chance = 18,
catch_up = false,
action = function(pos)
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local p = minetest.find_node_near(pos, 1, {"group:flammable"})
if not p then
return
end
local flammable_node = minetest.get_node(p)
local def = minetest.registered_nodes[flammable_node.name]
if def.on_burn then
def.on_burn(p)
else
minetest.remove_node(p)
minetest.check_for_falling(p)
end
end
})
end