forked from Mineclonia/Mineclonia
Add age to of fire to greatly limit fire spread
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d13498e6f9
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bfb1e3e447
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@ -40,6 +40,10 @@ local fire_death_messages = {
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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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@ -71,37 +75,73 @@ minetest.register_node("mcl_fire:fire", {
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end
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end,
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on_timer = function(pos)
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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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if (#airs == 0) or ((not fire_enabled) and math.random(1,3) == 1) then
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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 (not fire_enabled) then
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-- Restart timer
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minetest.get_node_timer(pos):start(math.random(3, 7))
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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 burned = false
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if math.random(1,2) == 1 then
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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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burned = true
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break
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else
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table.remove(airs, r)
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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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if not burned then
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if 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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-- 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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minetest.get_node_timer(pos):start(math.random(3, 7))
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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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@ -119,7 +159,7 @@ minetest.register_node("mcl_fire:fire", {
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mcl_portals.light_nether_portal(pos)
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end
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minetest.get_node_timer(pos):start(math.random(3, 7))
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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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@ -168,11 +208,11 @@ minetest.register_node("mcl_fire:eternal_fire", {
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end
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end
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-- Restart timer
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minetest.get_node_timer(pos):start(math.random(3, 7))
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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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minetest.get_node_timer(pos):start(math.random(3, 7))
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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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@ -369,30 +409,6 @@ else -- Fire enabled
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end,
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})
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-- Turn flammable nodes into air
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minetest.register_abm({
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label = "Remove flammable node below fire",
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nodenames = {"group:fire"},
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neighbors = {"group:flammable"},
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interval = 5,
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chance = 18,
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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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local p = {x=pos.x, y=pos.y-1, z=pos.z}
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local flammable_node = minetest.get_node(p)
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local def = minetest.registered_nodes[flammable_node.name]
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if def.on_burn then
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def.on_burn(p)
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else
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local g = minetest.get_item_group(flammable_node.name, "flammable")
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if g ~= -1 then
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minetest.set_node(p, {name="air"})
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minetest.check_for_falling(p)
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end
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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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