Fire mod: Code cleanup, compress textures

mods/fire/init.lua

 -- fire/init.lua
 
 -- Global namespace for functions
-
 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
@@ -27,12 +24,9 @@ end
 --
 
 -- Flood flame function
-
-local function flood_flame(pos, oldnode, newnode)
+local function flood_flame(pos, _, newnode)
 	-- Play flame extinguish sound if liquid is not an 'igniter'
-	local nodedef = minetest.registered_items[newnode.name]
-	if not (nodedef and nodedef.groups and
-			nodedef.groups.igniter and nodedef.groups.igniter > 0) then
+	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
@@ -41,19 +35,16 @@ local function flood_flame(pos, oldnode, newnode)
 end
 
 -- Flame nodes
-
-minetest.register_node("fire:basic_flame", {
+local fire_node = {
 	drawtype = "firelike",
-	tiles = {
-		{
-			name = "fire_basic_flame_animated.png",
-			animation = {
-				type = "vertical_frames",
-				aspect_w = 16,
-				aspect_h = 16,
-				length = 1
-			},
-		},
+	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",
@@ -63,61 +54,35 @@ minetest.register_node("fire:basic_flame", {
 	sunlight_propagates = true,
 	floodable = true,
 	damage_per_second = 4,
-	groups = {igniter = 2, dig_immediate = 3, not_in_creative_inventory = 1},
-	drop = "",
-
-	on_timer = function(pos)
-		local f = minetest.find_node_near(pos, 1, {"group:flammable"})
-		if not fire_enabled or not f then
-			minetest.remove_node(pos)
-			return
-		end
-		-- Restart timer
-		return true
-	end,
-
-	on_construct = function(pos)
-		if not fire_enabled then
-			minetest.remove_node(pos)
-		else
-			minetest.get_node_timer(pos):start(math.random(30, 60))
-		end
-	end,
-
-	on_flood = flood_flame,
-})
-
-minetest.register_node("fire:permanent_flame", {
-	description = S("Permanent Flame"),
-	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",
-	light_source = 13,
-	walkable = false,
-	buildable_to = true,
-	sunlight_propagates = true,
-	floodable = true,
-	damage_per_second = 4,
-	groups = {igniter = 2, dig_immediate = 3},
+	groups = {igniter = 2, dig_immediate = 3, fire = 1},
 	drop = "",
+	on_flood = flood_flame
+}
+
+-- Basic flame node
+local flame_fire_node = table.copy(fire_node)
+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
 
-	on_flood = flood_flame,
-})
+minetest.register_node("fire:basic_flame", flame_fire_node)
 
+-- Permanent flame node
+local permanent_fire_node = table.copy(fire_node)
+permanent_fire_node.description = S("Permanent Flame")
 
--- Flint and steel
+minetest.register_node("fire:permanent_flame", permanent_fire_node)
 
+-- Flint and Steel
 minetest.register_tool("fire:flint_and_steel", {
 	description = S("Flint and Steel"),
 	inventory_image = "fire_flint_steel.png",
@@ -125,11 +90,8 @@ minetest.register_tool("fire:flint_and_steel", {
 
 	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 = 0.5, max_hear_distance = 8},
-			true
-		)
+		minetest.sound_play("fire_flint_and_steel",
+			{pos = sound_pos, gain = 0.5, 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
@@ -153,10 +115,11 @@ minetest.register_tool("fire:flint_and_steel", {
 			-- Wear tool
 			local wdef = itemstack:get_definition()
 			itemstack:add_wear(1000)
+
 			-- 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)
+				minetest.sound_play(wdef.sound.breaks,
+					{pos = sound_pos, gain = 0.5}, true)
 			end
 			return itemstack
 		end
@@ -170,23 +133,21 @@ minetest.register_craft({
 	}
 })
 
-
 -- 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, oldnode)
+	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, igniter)
+	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,
+	end
 })
 
 
@@ -194,24 +155,18 @@ minetest.override_item("default:coalblock", {
 -- Sound
 --
 
-local flame_sound = minetest.settings:get_bool("flame_sound")
-if flame_sound == nil then
-	-- Enable if no setting present
-	flame_sound = true
-end
+-- 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
@@ -263,16 +218,13 @@ if flame_sound then
 				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
-				}
-			)
+			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
@@ -281,7 +233,6 @@ if flame_sound then
 	end
 
 	-- Cycle for updating players sounds
-
 	minetest.register_globalstep(function(dtime)
 		timer = timer + dtime
 		if timer < cycle then
@@ -296,7 +247,6 @@ if flame_sound then
 	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
@@ -308,19 +258,14 @@ end
 
 
 -- Deprecated function kept temporarily to avoid crashes if mod fire nodes call it
-
-function fire.update_sounds_around(pos)
-end
-
+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"},
@@ -333,11 +278,10 @@ if fire_enabled then
 			if p then
 				minetest.set_node(p, {name = "fire:basic_flame"})
 			end
-		end,
+		end
 	})
 
 	-- Remove flammable nodes around basic flame
-
 	minetest.register_abm({
 		label = "Remove flammable nodes",
 		nodenames = {"fire:basic_flame"},
@@ -358,7 +302,6 @@ if fire_enabled then
 				minetest.remove_node(p)
 				minetest.check_for_falling(p)
 			end
-		end,
+		end
 	})
-
 end