write something there

mods/ethereal/biomes_init.lua

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+
+-- storage tables
+
+local old_biomes, old_decor = {}, {}
+
+-- backup registered biomes
+
+for key, def in pairs(minetest.registered_biomes) do
+	old_biomes[key] = def
+end
+
+-- backup registered decorations
+
+for key, def in pairs(minetest.registered_decorations) do
+	old_decor[key] = def
+end
+
+-- clear current biome data
+
+minetest.clear_registered_biomes()
+minetest.clear_registered_decorations()
+-- minetest.clear_registered_ores()
+
+-- create list of default biomes to remove
+
+local def_biomes = {
+	["rainforest"] = 1,
+	["rainforest_swamp"] = 1,
+	["rainforest_ocean"] = 1,
+	["rainforest_under"] = 1,
+	["grassland"] = 1,
+	["grassland_dunes"] = 1,
+	["grassland_ocean"] = 1,
+	["grassland_under"] = 1,
+	["taiga"] = 1,
+	["taiga_ocean"] = 1,
+	["taiga_under"] = 1,
+	["icesheet"] = 1,
+	["icesheet_ocean"] = 1,
+	["icesheet_under"] = 1,
+	["snowy_grassland"] = 1,
+	["snowy_grassland_ocean"] = 1,
+	["snowy_grassland_under"] = 1,
+	["desert"] = 1,
+	["desert_ocean"] = 1,
+	["desert_under"] = 1,
+	["tundra"] = 1,
+	["tundra_highland"] = 1,
+	["tundra_beach"] = 1,
+	["tundra_ocean"] = 1,
+	["tundra_under"] = 1,
+	["sandstone_desert"] = 1,
+	["sandstone_desert_ocean"] = 1,
+	["sandstone_desert_under"] = 1,
+	["savanna"] = 1,
+	["savanna_shore"] = 1,
+	["savanna_ocean"] = 1,
+	["savanna_under"] = 1,
+	["cold_desert"] = 1,
+	["cold_desert_ocean"] = 1,
+	["cold_desert_under"] = 1,
+	["coniferous_forest"] = 1,
+	["coniferous_forest_dunes"] = 1,
+	["coniferous_forest_ocean"] = 1,
+	["coniferous_forest_under"] = 1,
+	["deciduous_forest"] = 1,
+	["deciduous_forest_shore"] = 1,
+	["deciduous_forest_ocean"] = 1,
+	["deciduous_forest_under"] = 1
+}
+
+-- only re-register biomes that aren't on the list
+
+for key, def in pairs(old_biomes) do
+
+	if not def_biomes[key] then minetest.register_biome(def) end
+end
+
+-- loop through decorations
+
+for key, def in pairs(old_decor) do
+
+	local can_add = true
+	local new_biomes = {}
+
+	if type(def.biomes) == "table" then
+
+		-- loop through decoration biomes, only re-add one's not on above list
+		for num, bio in pairs(def.biomes) do
+
+			if not def_biomes[bio] then table.insert(new_biomes, bio) end
+		end
+
+		-- if no biomes are left on new list, do not re-add decoration
+		if #new_biomes == 0 then can_add = false end
+
+	elseif type(def.biomes) == "string" then
+
+		if def_biomes[def.biomes] then
+			can_add = false
+		else
+			new_biomes = {def.biomes} -- convert to table
+		end
+
+	elseif not def.biomes then new_biomes = nil end -- keep it nil for re-adding
+
+	if can_add == true then
+
+		def.biomes = new_biomes
+
+		minetest.register_decoration(def)
+	end
+end