First Commit by TenPlus1

README.txt

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+Minetest 0.4 mod: fire
+======================
+
+License of source code:
+-----------------------
+Copyright (C) 2012 Perttu Ahola (celeron55) <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+http://www.gnu.org/licenses/lgpl-2.1.html
+
+License of media (textures and sounds)
+--------------------------------------
+Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)                                 
+http://creativecommons.org/licenses/by-sa/3.0/
+
+Authors of media files
+-----------------------
+Everything not listed in here:
+Copyright (C) 2012 Perttu Ahola (celeron55) <celeron55@gmail.com>
+
+fire_small.ogg sampled from:
+  http://www.freesound.org/people/dobroide/sounds/4211/
+
+fire_large.ogg sampled from:
+  http://www.freesound.org/people/Dynamicell/sounds/17548/
+
+fire_basic_flame_animated.png:
+  Muadtralk

init.lua

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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,hot=3},
+	drop = "",
+	walkable = false,
+	buildable_to = true,
+	damage_per_second = 4,
+	
+	after_place_node = function(pos, placer)
+		fire.update_sounds_around(pos) -- add
+	end,
+	
+	after_dig_node = function(pos, oldnode, oldmetadata, digger)
+		fire.update_sounds_around(pos) --remove
+	end,
+})
+
+fire = {}
+fire.D = 6
+-- key: position hash of low corner of area
+-- value: {handle=sound handle, name=sound name}
+fire.sounds = {}
+
+function fire.update_sounds_around(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
+	}
+
+	local cp = {x=(p0.x+p1.x)/2, y=(p0.y+p1.y)/2, z=(p0.z+p1.z)/2}
+	local flames_p = minetest.find_nodes_in_area(p0, p1, {"fire:basic_flame"})
+	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.flame_should_extinguish(pos)
+	if minetest.setting_getbool("disable_fire") then return true end
+	local ps = minetest.find_nodes_in_area(	{x=pos.x-1, y=pos.y, z=pos.z-1}, -- all 1's were 2
+											{x=pos.x+1, y=pos.y, z=pos.z+1},
+											{"group:puts_out_fire"})
+	return (#ps ~= 0)
+end
+
+-- Ignite neighboring nodes
+minetest.register_abm({
+	nodenames = {"group:flammable"},
+	neighbors = {"group:igniter"},
+	interval = 2, -- 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 = minetest.find_node_near(p0, 1, {"air"})
+		if p then
+			minetest.set_node(p, {name="fire:basic_flame"})
+			fire.update_sounds_around(p) --add
+		end
+	end,
+})
+
+-- Remove flammable nodes and flame
+minetest.register_abm({
+	nodenames = {"fire:basic_flame"},
+	interval = 2, -- 1
+	chance = 2,
+	action = function(p0, node, _, _)
+
+		-- If no flammable nodes around flame (or are extinguishers), remove flame
+		if not minetest.find_node_near(p0, 1, {"group:flammable"})
+		or fire.flame_should_extinguish(p0) then
+			minetest.env:set_node(p0, {name="air"})
+			fire.update_sounds_around(p0) --remove
+			return
+		end
+
+		if math.random(1,4) == 1 then
+			-- remove a flammable node around flame
+			local p = minetest.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:set_node(p, {name="air"})
+--				nodeupdate(p)
+			end
+		else
+			-- remove flame
+			minetest.env:set_node(p0, {name="air"})
+			fire.update_sounds_around(p0) --remove
+		end
+	end,
+})