forked from VoxeLibre/VoxeLibre
445 lines
14 KiB
Lua
445 lines
14 KiB
Lua
-- Global namespace for functions
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mcl_fire = {}
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local S = minetest.get_translator("mcl_fire")
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local N = function(s) return s end
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--
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-- Items
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--
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-- Flame nodes
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-- Fire settings
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-- When enabled, fire destroys other blocks.
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local fire_enabled = minetest.settings:get_bool("enable_fire", true)
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-- Enable sound
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local flame_sound = minetest.settings:get_bool("flame_sound", true)
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-- Help texts
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local fire_help, eternal_fire_help
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if fire_enabled then
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fire_help = S("Fire is a damaging and destructive but short-lived kind of block. It will destroy and spread towards near flammable blocks, but fire will disappear when there is nothing to burn left. It will be extinguished by nearby water and rain. Fire can be destroyed safely by punching it, but it is hurtful if you stand directly in it. If a fire is started above netherrack or a magma block, it will immediately turn into an eternal fire.")
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else
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fire_help = S("Fire is a damaging but non-destructive short-lived kind of block. It will disappear when there is no flammable block around. Fire does not destroy blocks, at least not in this world. It will be extinguished by nearby water and rain. Fire can be destroyed safely by punching it, but it is hurtful if you stand directly in it. If a fire is started above netherrack or a magma block, it will immediately turn into an eternal fire.")
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end
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if fire_enabled then
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eternal_fire_help = S("Eternal fire is a damaging block that might create more fire. It will create fire around it when flammable blocks are nearby. Eternal fire can be extinguished by punches and nearby water blocks. Other than (normal) fire, eternal fire does not get extinguished on its own and also continues to burn under rain. Punching eternal fire is safe, but it hurts if you stand inside.")
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else
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eternal_fire_help = S("Eternal fire is a damaging block. Eternal fire can be extinguished by punches and nearby water blocks. Other than (normal) fire, eternal fire does not get extinguished on its own and also continues to burn under rain. Punching eternal fire is safe, but it hurts if you stand inside.")
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end
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local fire_death_messages = {
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N("@1 has been cooked crisp."),
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N("@1 felt the burn."),
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N("@1 died in the flames."),
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N("@1 died in a fire."),
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}
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local fire_timer = function(pos)
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minetest.get_node_timer(pos):start(math.random(3, 7))
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end
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minetest.register_node("mcl_fire:fire", {
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description = S("Fire"),
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_doc_items_longdesc = fire_help,
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drawtype = "firelike",
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tiles = {
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{
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name = "fire_basic_flame_animated.png",
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animation = {
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type = "vertical_frames",
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aspect_w = 16,
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aspect_h = 16,
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length = 1
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},
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},
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},
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inventory_image = "fire_basic_flame.png",
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paramtype = "light",
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light_source = minetest.LIGHT_MAX,
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walkable = false,
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buildable_to = true,
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sunlight_propagates = true,
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damage_per_second = 1,
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_mcl_node_death_message = fire_death_messages,
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groups = {fire = 1, dig_immediate = 3, not_in_creative_inventory = 1, dig_by_piston=1, destroys_items=1 },
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floodable = true,
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on_flood = function(pos, oldnode, newnode)
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if minetest.get_item_group(newnode.name, "water") ~= 0 then
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minetest.sound_play("fire_extinguish_flame", {pos = pos, gain = 0.25, max_hear_distance = 16}, true)
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end
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end,
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on_timer = function(pos)
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local node = minetest.get_node(pos)
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-- Age is a number from 0 to 15 and is increased every timer step.
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-- "old" fire is more likely to be extinguished
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local age = node.param2
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local flammables = minetest.find_nodes_in_area({x=pos.x-1, y=pos.y-1, z=pos.z-1}, {x=pos.x+1, y=pos.y+4, z=pos.z+1}, {"group:flammable"})
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local below = minetest.get_node({x=pos.x, y=pos.z-1, z=pos.z})
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local below_is_flammable = minetest.get_item_group(below.name, "flammable") > 0
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-- Extinguish fire
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if (not fire_enabled) and (math.random(1,3) == 1) then
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minetest.remove_node(pos)
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return
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end
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if age == 15 and not below_is_flammable then
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minetest.remove_node(pos)
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return
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elseif age > 3 and #flammables == 0 and not below_is_flammable and math.random(1,4) == 1 then
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minetest.remove_node(pos)
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return
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end
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local age_add = 1
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-- If fire spread is disabled, we have to skip the "destructive" code
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if (not fire_enabled) then
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if age + age_add <= 15 then
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node.param2 = age + age_add
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minetest.set_node(pos, node)
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end
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-- Restart timer
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fire_timer(pos)
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return
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end
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-- Spawn fire to nearby flammable nodes
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local is_next_to_flammable = minetest.find_node_near(pos, 2, {"group:flammable"}) ~= nil
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if is_next_to_flammable and math.random(1,2) == 1 then
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-- The fire we spawn copies the age of this fire.
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-- This prevents fire from spreading infinitely far as the fire fire dies off
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-- quicker the further it has spreaded.
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local age_next = math.min(15, age + math.random(0, 1))
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-- Select random type of fire spread
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local burntype = math.random(1,2)
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if burntype == 1 then
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-- Spawn fire in air
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local nodes = minetest.find_nodes_in_area({x=pos.x-1, y=pos.y-1, z=pos.z-1}, {x=pos.x+1, y=pos.y+4, z=pos.z+1}, {"air"})
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while #nodes > 0 do
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local r = math.random(1, #nodes)
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if minetest.find_node_near(nodes[r], 1, {"group:flammable"}) then
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minetest.set_node(nodes[r], {name="mcl_fire:fire", param2 = age_next})
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break
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else
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table.remove(nodes, r)
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end
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end
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else
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-- Replace flammable node with fire
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local nodes = minetest.find_nodes_in_area({x=pos.x-1, y=pos.y-1, z=pos.z-1}, {x=pos.x+1, y=pos.y+4, z=pos.z+1}, {"group:flammable"})
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if #nodes > 0 then
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local r = math.random(1, #nodes)
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minetest.set_node(nodes[r], {name="mcl_fire:fire", param2 = age_next})
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end
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end
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end
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-- Regular age increase
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if age + age_add <= 15 then
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node.param2 = age + age_add
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minetest.set_node(pos, node)
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end
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-- Restart timer
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fire_timer(pos)
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end,
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drop = "",
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sounds = {},
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-- Turn into eternal fire on special blocks, light Nether portal (if possible), start burning timer
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on_construct = function(pos)
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local bpos = {x=pos.x, y=pos.y-1, z=pos.z}
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local under = minetest.get_node(bpos).name
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local dim = mcl_worlds.pos_to_dimension(bpos)
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if under == "mcl_nether:magma" or under == "mcl_nether:netherrack" or (under == "mcl_core:bedrock" and dim == "end") then
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minetest.swap_node(pos, {name = "mcl_fire:eternal_fire"})
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end
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if minetest.get_modpath("mcl_portals") then
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mcl_portals.light_nether_portal(pos)
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end
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fire_timer(pos)
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end,
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_mcl_blast_resistance = 0,
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})
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minetest.register_node("mcl_fire:eternal_fire", {
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description = S("Eternal Fire"),
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_doc_items_longdesc = eternal_fire_help,
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drawtype = "firelike",
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tiles = {
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{
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name = "fire_basic_flame_animated.png",
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animation = {
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type = "vertical_frames",
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aspect_w = 16,
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aspect_h = 16,
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length = 1
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},
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},
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},
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inventory_image = "fire_basic_flame.png",
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paramtype = "light",
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light_source = minetest.LIGHT_MAX,
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walkable = false,
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buildable_to = true,
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sunlight_propagates = true,
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damage_per_second = 1,
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_mcl_node_death_message = fire_death_messages,
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groups = {fire = 1, dig_immediate = 3, not_in_creative_inventory = 1, dig_by_piston = 1, destroys_items = 1},
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floodable = true,
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on_flood = function(pos, oldnode, newnode)
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if minetest.get_item_group(newnode.name, "water") ~= 0 then
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minetest.sound_play("fire_extinguish_flame", {pos = pos, gain = 0.25, max_hear_distance = 16}, true)
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end
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end,
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on_timer = function(pos)
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if fire_enabled then
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local airs = minetest.find_nodes_in_area({x=pos.x-1, y=pos.y-1, z=pos.z-1}, {x=pos.x+1, y=pos.y+4, z=pos.z+1}, {"air"})
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while #airs > 0 do
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local r = math.random(1, #airs)
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if minetest.find_node_near(airs[r], 1, {"group:flammable"}) then
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minetest.set_node(airs[r], {name="mcl_fire:fire"})
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break
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else
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table.remove(airs, r)
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end
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end
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end
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-- Restart timer
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fire_timer(pos)
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end,
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-- Start burning timer and light Nether portal (if possible)
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on_construct = function(pos)
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fire_timer(pos)
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if minetest.get_modpath("mcl_portals") then
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mcl_portals.light_nether_portal(pos)
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end
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end,
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sounds = {},
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drop = "",
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_mcl_blast_resistance = 0,
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})
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--
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-- Sound
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--
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if flame_sound then
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local handles = {}
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local timer = 0
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-- Parameters
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local radius = 8 -- Flame node search radius around player
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local cycle = 3 -- Cycle time for sound updates
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-- Update sound for player
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function mcl_fire.update_player_sound(player)
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local player_name = player:get_player_name()
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-- Search for flame nodes in radius around player
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local ppos = player:get_pos()
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local areamin = vector.subtract(ppos, radius)
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local areamax = vector.add(ppos, radius)
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local fpos, num = minetest.find_nodes_in_area(
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areamin,
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areamax,
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{"mcl_fire:fire", "mcl_fire:eternal_fire"}
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)
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-- Total number of flames in radius
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local flames = (num["mcl_fire:fire"] or 0) +
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(num["mcl_fire:eternal_fire"] or 0)
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-- Stop previous sound
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if handles[player_name] then
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minetest.sound_fade(handles[player_name], -0.4, 0.0)
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handles[player_name] = nil
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end
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-- If flames
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if flames > 0 then
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-- Find centre of flame positions
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local fposmid = fpos[1]
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-- If more than 1 flame
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if #fpos > 1 then
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local fposmin = areamax
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local fposmax = areamin
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for i = 1, #fpos do
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local fposi = fpos[i]
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if fposi.x > fposmax.x then
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fposmax.x = fposi.x
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end
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if fposi.y > fposmax.y then
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fposmax.y = fposi.y
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end
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if fposi.z > fposmax.z then
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fposmax.z = fposi.z
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end
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if fposi.x < fposmin.x then
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fposmin.x = fposi.x
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end
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if fposi.y < fposmin.y then
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fposmin.y = fposi.y
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end
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if fposi.z < fposmin.z then
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fposmin.z = fposi.z
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end
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end
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fposmid = vector.divide(vector.add(fposmin, fposmax), 2)
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end
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-- Play sound
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local handle = minetest.sound_play(
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"fire_fire",
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{
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pos = fposmid,
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to_player = player_name,
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gain = math.min(0.06 * (1 + flames * 0.125), 0.18),
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max_hear_distance = 32,
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loop = true, -- In case of lag
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}
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)
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-- Store sound handle for this player
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if handle then
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handles[player_name] = handle
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end
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end
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end
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-- Cycle for updating players sounds
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minetest.register_globalstep(function(dtime)
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timer = timer + dtime
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if timer < cycle then
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return
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end
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timer = 0
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local players = minetest.get_connected_players()
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for n = 1, #players do
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mcl_fire.update_player_sound(players[n])
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end
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end)
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-- Stop sound and clear handle on player leave
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minetest.register_on_leaveplayer(function(player)
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local player_name = player:get_player_name()
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if handles[player_name] then
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minetest.sound_stop(handles[player_name])
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handles[player_name] = nil
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end
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end)
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end
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--
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-- ABMs
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--
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-- Extinguish all flames quickly with water and such
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minetest.register_abm({
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label = "Extinguish fire",
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nodenames = {"mcl_fire:fire", "mcl_fire:eternal_fire"},
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neighbors = {"group:puts_out_fire"},
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interval = 3,
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chance = 1,
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catch_up = false,
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action = function(pos, node, active_object_count, active_object_count_wider)
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minetest.remove_node(pos)
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minetest.sound_play("fire_extinguish_flame",
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{pos = pos, max_hear_distance = 16, gain = 0.15}, true)
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end,
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})
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-- Enable the following ABMs according to 'enable fire' setting
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if not fire_enabled then
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-- Occasionally remove fire if fire disabled
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-- NOTE: Fire is normally extinguished in timer function
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minetest.register_abm({
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label = "Remove disabled fire",
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nodenames = {"mcl_fire:fire"},
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interval = 10,
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chance = 10,
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catch_up = false,
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action = minetest.remove_node,
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})
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else -- Fire enabled
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-- Set fire to air nodes (inverse pyramid pattern) above lava source
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minetest.register_abm({
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label = "Ignite fire by lava",
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nodenames = {"group:lava"},
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interval = 7,
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chance = 2,
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catch_up = false,
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action = function(pos)
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local node = minetest.get_node(pos)
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local def = minetest.registered_nodes[node.name]
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-- Check if liquid source node
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if def and def.liquidtype ~= "source" then
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return
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end
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local function try_ignite(airs)
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while #airs > 0 do
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local r = math.random(1, #airs)
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if minetest.find_node_near(airs[r], 1, {"group:flammable"}) then
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minetest.set_node(airs[r], {name="mcl_fire:fire"})
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return true
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else
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table.remove(airs, r)
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end
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end
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return false
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end
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local airs1 = minetest.find_nodes_in_area({x=pos.x-1, y=pos.y+1, z=pos.z-1}, {x=pos.x+1, y=pos.y+1, z=pos.z+1}, {"air"})
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local h = math.random(1, 2)
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if h == 2 and #airs1 > 0 then
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local airs2 = minetest.find_nodes_in_area({x=pos.x-2, y=pos.y+2, z=pos.z-2}, {x=pos.x+2, y=pos.y+2, z=pos.z+2}, {"air"})
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try_ignite(airs2)
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else
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try_ignite(airs1)
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end
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end,
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})
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end
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-- Set pointed_thing on (normal) fire.
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-- * pointed_thing: Pointed thing to ignite
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-- * player: Player who sets fire or nil if nobody
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-- * allow_on_fire: If false, can't ignite fire on fire (default: true)
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mcl_fire.set_fire = function(pointed_thing, player, allow_on_fire)
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local pname
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if player == nil then
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pname = ""
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else
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pname = player:get_player_name()
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end
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local n = minetest.get_node(pointed_thing.above)
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local nu = minetest.get_node(pointed_thing.under)
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if allow_on_fire == false and minetest.get_item_group(nu.name, "fire") ~= 0 then
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return
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end
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if minetest.is_protected(pointed_thing.above, pname) then
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minetest.record_protection_violation(pointed_thing.above, pname)
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return
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end
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if n.name == "air" then
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minetest.add_node(pointed_thing.above, {name="mcl_fire:fire"})
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end
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end
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minetest.register_alias("mcl_fire:basic_flame", "mcl_fire:fire")
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minetest.register_alias("fire:basic_flame", "mcl_fire:fire")
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minetest.register_alias("fire:permanent_flame", "mcl_fire:eternal_flame")
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dofile(minetest.get_modpath(minetest.get_current_modname()).."/flint_and_steel.lua")
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dofile(minetest.get_modpath(minetest.get_current_modname()).."/fire_charge.lua")
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