Add per-map skybox support

The skybox textures have to follow this naming convention to be auto-detected by `ctf_map`: `<mapname>_skybox_<1-6>.png`

mods/ctf/ctf_map/init.lua

@@ -6,6 +6,21 @@ function ctf_map.get_team_relative_z(player)
 	return (tname == "red" and 1 or -1) * player:get_pos().z
 end
 
+-- Convenience function to check whether a file (or multiple files) exists in mapdir
+function ctf_map.file_exists(subdir, target)
+	local list = minetest.get_dir_list(ctf_map.mapdir .. subdir, false)
+	if type(target) == "string" then
+		return table.indexof(list, target) ~= 1
+	elseif type(target) == "table" then
+		for _, filename in pairs(target) do
+			if table.indexof(list, filename) == -1 then
+				return false
+			end
+		end
+		return true
+	end
+end
+
 -- Overridden by server mods
 function ctf_map.can_cross(player)
 	return false
@@ -20,7 +35,7 @@ if minetest.get_modpath("ctf") then
 	dofile(modpath .. "/base.lua")
 	dofile(modpath .. "/chest.lua")
 	dofile(modpath .. "/give_initial_stuff.lua")
-	dofile(modpath .. "/time.lua")
+	dofile(modpath .. "/time_sky.lua")
 	dofile(modpath .. "/schem_map.lua")
 	dofile(modpath .. "/maps_catalog.lua")
 

mods/ctf/ctf_map/schem_map.lua

@@ -27,7 +27,7 @@ minetest.register_alias_force("default:stone_with_gold", "default:stone")
 
 
 local max_r    = 120
-local mapdir = minetest.get_modpath("ctf_map") .. "/maps/"
+ctf_map.mapdir = minetest.get_modpath("ctf_map") .. "/maps/"
 ctf_map.map    = nil
 
 -- Modify server status message to include map info
@@ -103,10 +103,11 @@ local function load_map_meta(idx, path, filename)
 		hint          = meta:get("hint"),
 		rotation      = meta:get("rotation"),
 		screenshot    = meta:get("screenshot"),
+		skybox        = ctf_map.skybox_exists(path, filename),
 		license       = meta:get("license"),
 		others        = meta:get("others"),
 		base_node     = meta:get("base_node"),
-		schematic     = path .. ".mts",
+		schematic     = path .. filename .. ".mts",
 		initial_stuff = initial_stuff and initial_stuff:split(","),
 		treasures     = treasures and treasures:split(";"),
 		start_time    = start_time and tonumber(start_time),
@@ -190,11 +191,11 @@ end
 local function load_maps()
 	local files_hash = {}
 
-	local dirs = minetest.get_dir_list(mapdir, true)
+	local dirs = minetest.get_dir_list(ctf_map.mapdir, true)
 	table.insert(dirs, ".")
 	for _, dir in pairs(dirs) do
 		if dir ~= ".git" then
-			local files = minetest.get_dir_list(mapdir .. dir, false)
+			local files = minetest.get_dir_list(ctf_map.mapdir .. dir, false)
 			for i = 1, #files do
 				local parts = files[i]:split(".")
 				local filename = parts[1]
@@ -224,13 +225,14 @@ local function load_maps()
 		if not conf:get_bool("disabled", false) and val ~= "false" then
 			local map = load_map_meta(idx, path.subdir, path.filename)
 			table.insert(ctf_map.available_maps, map)
+
 			minetest.log("action", "Found map '" .. map.name .. "'")
 			minetest.log("info", dump(map))
 			idx = idx + 1
 		end
 	end
 	if not next(ctf_map.available_maps) then
-		error("No maps found in directory " .. mapdir)
+		error("No maps found in directory " .. ctf_map.mapdir)
 	end
 	return ctf_map.available_maps
 end
@@ -248,7 +250,7 @@ minetest.register_chatcommand("maps_reload", {
 
 local function place_map(map)
 	ctf_map.emerge_with_callbacks(nil, map.pos1, map.pos2, function()
-		local schempath = mapdir .. map.schematic
+		local schempath = ctf_map.mapdir .. map.schematic
 		local res = minetest.place_schematic(map.pos1, schempath,
 				map.rotation == "z" and "0" or "90")
 
@@ -356,11 +358,14 @@ ctf_match.register_on_new_match(function()
 		end
 	end
 
+	-- Place map
+	place_map(ctf_map.map)
+
 	-- Update time speed
 	ctf_map.update_time()
 
-	-- Place map
-	place_map(ctf_map.map)
+	-- Update players' skyboxes last
+	ctf_map.set_skybox_all()
 end)
 
 function ctf_match.create_teams()
@@ -387,3 +392,9 @@ function ctf_match.create_teams()
 		end
 	end
 end
+
+minetest.register_on_joinplayer(function(player)
+	if ctf_map.map then
+		ctf_map.set_skybox(player)
+	end
+end)

mods/ctf/ctf_map/time.lua

@@ -1,13 +0,0 @@
-local BASE_TIME_SPEED = 72
-
-function ctf_map.update_time()
-	local time = ctf_map.map.start_time
-	local mult = ctf_map.map.time_speed or 1
-	if time then
-		minetest.set_timeofday(time)
-	else
-		minetest.set_timeofday(0.4)
-	end
-
-	minetest.settings:set("time_speed", BASE_TIME_SPEED * mult)
-end

mods/ctf/ctf_map/time_sky.lua

@@ -0,0 +1,47 @@
+local BASE_TIME_SPEED = 72
+
+function ctf_map.update_time()
+	local time = ctf_map.map.start_time
+	local mult = ctf_map.map.time_speed or 1
+	if time then
+		minetest.set_timeofday(time)
+	else
+		minetest.set_timeofday(0.4)
+	end
+
+	minetest.settings:set("time_speed", BASE_TIME_SPEED * mult)
+end
+
+function ctf_map.skybox_exists(subdir, filename)
+	return ctf_map.file_exists(subdir, {
+		filename .. "_skybox_1.png",
+		filename .. "_skybox_2.png",
+		filename .. "_skybox_3.png",
+		filename .. "_skybox_4.png",
+		filename .. "_skybox_5.png",
+		filename .. "_skybox_6.png"
+	})
+end
+
+function ctf_map.set_skybox(player)
+	if ctf_map.map.skybox then
+		local prefix = ctf_map.map.filename .. "_skybox_"
+		local skybox_textures = {
+			prefix .. "1.png",  -- up
+			prefix .. "2.png",  -- down
+			prefix .. "3.png",  -- east
+			prefix .. "4.png",  -- west
+			prefix .. "5.png",  -- south
+			prefix .. "6.png"   -- north
+		}
+		player:set_sky(0xFFFFFFFF, "skybox", skybox_textures, false)
+	else
+		player:set_sky(0xFFFFFFFF, "regular", {}, true)
+	end
+end
+
+function ctf_map.set_skybox_all()
+	for _, player in pairs(minetest.get_connected_players()) do
+		ctf_map.set_skybox(player)
+	end
+end