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-- minetest/fire/init.lua
minetest.register_node("fire:basic_flame", {
description = "Fire",
drawtype = "plantlike",
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",
light_source = 14,
groups = {igniter=2,dig_immediate=3},
drop = '',
walkable = false,
buildable_to = true,
damage_per_second = 4,
after_place_node = function(pos, placer)
fire.on_flame_add_at(pos)
end,
after_dig_node = function(pos, oldnode, oldmetadata, digger)
fire.on_flame_remove_at(pos)
end,
})
fire = {}
fire.D = 6
-- key: position hash of low corner of area
-- value: {handle=sound handle, name=sound name}
fire.sounds = {}
function fire.get_area_p0p1(pos)
local p0 = {
x=math.floor(pos.x/fire.D)*fire.D,
y=math.floor(pos.y/fire.D)*fire.D,
z=math.floor(pos.z/fire.D)*fire.D,
}
local p1 = {
x=p0.x+fire.D-1,
y=p0.y+fire.D-1,
z=p0.z+fire.D-1
}
return p0, p1
end
function fire.update_sounds_around(pos)
local p0, p1 = fire.get_area_p0p1(pos)
local cp = {x=(p0.x+p1.x)/2, y=(p0.y+p1.y)/2, z=(p0.z+p1.z)/2}
local flames_p = minetest.env:find_nodes_in_area(p0, p1, {"fire:basic_flame"})
--print("number of flames at "..minetest.pos_to_string(p0).."/"
-- ..minetest.pos_to_string(p1)..": "..#flames_p)
local should_have_sound = (#flames_p > 0)
local wanted_sound = nil
if #flames_p >= 9 then
wanted_sound = {name="fire_large", gain=1.5}
elseif #flames_p > 0 then
wanted_sound = {name="fire_small", gain=1.5}
end
local p0_hash = minetest.hash_node_position(p0)
local sound = fire.sounds[p0_hash]
if not sound then
if should_have_sound then
fire.sounds[p0_hash] = {
handle = minetest.sound_play(wanted_sound, {pos=cp, loop=true}),
name = wanted_sound.name,
}
end
else
if not wanted_sound then
minetest.sound_stop(sound.handle)
fire.sounds[p0_hash] = nil
elseif sound.name ~= wanted_sound.name then
minetest.sound_stop(sound.handle)
fire.sounds[p0_hash] = {
handle = minetest.sound_play(wanted_sound, {pos=cp, loop=true}),
name = wanted_sound.name,
}
end
end
end
function fire.on_flame_add_at(pos)
--print("flame added at "..minetest.pos_to_string(pos))
fire.update_sounds_around(pos)
end
function fire.on_flame_remove_at(pos)
--print("flame removed at "..minetest.pos_to_string(pos))
fire.update_sounds_around(pos)
end
function fire.find_pos_for_flame_around(pos)
return minetest.env:find_node_near(pos, 1, {"air"})
end
function fire.flame_should_extinguish(pos)
if minetest.setting_getbool("disable_fire") then return true end
--return minetest.env:find_node_near(pos, 1, {"group:puts_out_fire"})
local p0 = {x=pos.x-2, y=pos.y, z=pos.z-2}
local p1 = {x=pos.x+2, y=pos.y, z=pos.z+2}
local ps = minetest.env:find_nodes_in_area(p0, p1, {"group:puts_out_fire"})
return (#ps ~= 0)
end
-- Ignite neighboring nodes
minetest.register_abm({
nodenames = {"group:flammable"},
neighbors = {"group:igniter"},
interval = 1,
chance = 2,
action = function(p0, node, _, _)
-- If there is water or stuff like that around flame, don't ignite
if fire.flame_should_extinguish(p0) then
return
end
local p = fire.find_pos_for_flame_around(p0)
if p then
minetest.env:set_node(p, {name="fire:basic_flame"})
fire.on_flame_add_at(p)
end
end,
})
-- Rarely ignite things from far
minetest.register_abm({
nodenames = {"group:igniter"},
neighbors = {"air"},
interval = 2,
chance = 10,
action = function(p0, node, _, _)
local reg = minetest.registered_nodes[node.name]
if not reg or not reg.groups.igniter or reg.groups.igniter < 2 then
return
end
local d = reg.groups.igniter
local p = minetest.env:find_node_near(p0, d, {"group:flammable"})
if p then
-- If there is water or stuff like that around flame, don't ignite
if fire.flame_should_extinguish(p) then
return
end
local p2 = fire.find_pos_for_flame_around(p)
if p2 then
minetest.env:set_node(p2, {name="fire:basic_flame"})
fire.on_flame_add_at(p2)
end
end
end,
})
-- Remove flammable nodes and flame
minetest.register_abm({
nodenames = {"fire:basic_flame"},
interval = 1,
chance = 2,
action = function(p0, node, _, _)
-- If there is water or stuff like that around flame, remove flame
if fire.flame_should_extinguish(p0) then
minetest.env:remove_node(p0)
fire.on_flame_remove_at(p0)
return
end
-- Make the following things rarer
if math.random(1,3) == 1 then
return
end
-- If there are no flammable nodes around flame, remove flame
if not minetest.env:find_node_near(p0, 1, {"group:flammable"}) then
minetest.env:remove_node(p0)
fire.on_flame_remove_at(p0)
return
end
if math.random(1,4) == 1 then
-- remove a flammable node around flame
local p = minetest.env:find_node_near(p0, 1, {"group:flammable"})
if p then
-- If there is water or stuff like that around flame, don't remove
if fire.flame_should_extinguish(p0) then
return
end
minetest.env:remove_node(p)
nodeupdate(p)
end
else
-- remove flame
minetest.env:remove_node(p0)
fire.on_flame_remove_at(p0)
end
end,
})