biome_lib.block_log = {} biome_lib.block_recheck_list = {} biome_lib.run_block_recheck_list = false biome_lib.actionslist_aircheck = {} biome_lib.actionslist_no_aircheck = {} biome_lib.surfaceslist_aircheck = {} biome_lib.surfaceslist_no_aircheck = {} biome_lib.registered_decorations = {} biome_lib.fertile_perlin_octaves = 3 biome_lib.fertile_perlin_persistence = 0.6 biome_lib.fertile_perlin_scale = 100 local time_speed = tonumber(minetest.settings:get("time_speed")) biome_lib.time_scale = 1 if time_speed and time_speed > 0 then biome_lib.time_scale = 72 / time_speed end biome_lib.air = {name = "air"} -- the mapgen rarely creates useful surfaces outside this range, but mods can -- still specify a wider range if needed. biome_lib.mapgen_elevation_limit = { ["min"] = -16, ["max"] = 48 } -- Local functions function biome_lib.dbg(msg, level) local l = tonumber(level) or 0 if biome_lib.debug_log_level >= l then print(os.date("%Y-%m-%d %H:%M:%S").." [Biome Lib]: "..msg) minetest.log("verbose", "[Biome Lib]: "..msg) end end local function get_biome_data(pos, perlin_fertile) local fertility = perlin_fertile:get_2d({x=pos.x, y=pos.z}) local data = minetest.get_biome_data(pos) -- Original values this method returned were +1 (lowest) to -1 (highest) -- so we need to convert the 0-100 range from get_biome_data() to that. return fertility, 1 - (data.heat / 100 * 2), 1 - (data.humidity / 100 * 2) end function biome_lib.is_node_loaded(node_pos) local n = minetest.get_node_or_nil(node_pos) if (not n) or (n.name == "ignore") then return false end return true end function biome_lib.set_defaults(biome) biome.seed_diff = biome.seed_diff or 0 biome.min_elevation = biome.min_elevation or biome_lib.mapgen_elevation_limit.min biome.max_elevation = biome.max_elevation or biome_lib.mapgen_elevation_limit.max biome.temp_min = biome.temp_min or 1 biome.temp_max = biome.temp_max or -1 biome.humidity_min = biome.humidity_min or 1 biome.humidity_max = biome.humidity_max or -1 biome.plantlife_limit = biome.plantlife_limit or 0.1 biome.near_nodes_vertical = biome.near_nodes_vertical or 1 -- specific to on-generate biome.neighbors = biome.neighbors or biome.surface biome.near_nodes_size = biome.near_nodes_size or 0 biome.near_nodes_count = biome.near_nodes_count or 1 biome.rarity = biome.rarity or 50 biome.rarity_fertility = biome.rarity_fertility or 0 biome.max_count = biome.max_count or 125 biome.tries = biome.tries or 2 if biome.check_air ~= false then biome.check_air = true end -- specific to abm spawner biome.seed_diff = biome.seed_diff or 0 biome.light_min = biome.light_min or 0 biome.light_max = biome.light_max or 15 biome.depth_max = biome.depth_max or 1 biome.facedir = biome.facedir or 0 return biome end local function search_table(t, s) for i = 1, #t do if t[i] == s then return true end end return false end -- register the list of surfaces to spawn stuff on, filtering out all duplicates. -- separate the items by air-checking or non-air-checking map eval methods function biome_lib.register_on_generate(biomedef, nodes_or_function_or_model) -- if calling code passes an undefined node for a surface or -- as a node to be spawned, don't register an action for it. if type(nodes_or_function_or_model) == "string" and string.find(nodes_or_function_or_model, ":") and not minetest.registered_nodes[nodes_or_function_or_model] then biome_lib.dbg("Warning: Ignored registration for undefined spawn node: ".. dump(nodes_or_function_or_model), 2) return end if type(nodes_or_function_or_model) == "string" and not string.find(nodes_or_function_or_model, ":") then biome_lib.dbg("Warning: Registered function call using deprecated string method: ".. dump(nodes_or_function_or_model), 2) end biome_lib.mapgen_elevation_limit.min = math.min(biomedef.min_elevation or 0, biome_lib.mapgen_elevation_limit.min) biome_lib.mapgen_elevation_limit.max = math.max(biomedef.max_elevation or 0, biome_lib.mapgen_elevation_limit.max) local decor_def = biome_lib.can_use_decorations(biomedef, nodes_or_function_or_model) if decor_def then biome_lib.dbg("Using engine decorations instead of biome_lib functions for node(s): ".. dump(nodes_or_function_or_model), 3) biome_lib.registered_decorations[#biome_lib.registered_decorations + 1] = nodes_or_function_or_model minetest.register_decoration(decor_def) return elseif biomedef.check_air == false then biome_lib.dbg("Register no-air-check mapgen hook: "..dump(nodes_or_function_or_model), 3) biome_lib.actionslist_no_aircheck[#biome_lib.actionslist_no_aircheck + 1] = {biomedef, nodes_or_function_or_model} local s = biomedef.surface if type(s) == "string" then if s and (string.find(s, "^group:") or minetest.registered_nodes[s]) then if not search_table(biome_lib.surfaceslist_no_aircheck, s) then biome_lib.surfaceslist_no_aircheck[#biome_lib.surfaceslist_no_aircheck + 1] = s end else biome_lib.dbg("Warning: Ignored no-air-check registration for undefined surface node: "..dump(s), 2) end else for i = 1, #biomedef.surface do s = biomedef.surface[i] if s and (string.find(s, "^group:") or minetest.registered_nodes[s]) then if not search_table(biome_lib.surfaceslist_no_aircheck, s) then biome_lib.surfaceslist_no_aircheck[#biome_lib.surfaceslist_no_aircheck + 1] = s end else biome_lib.dbg("Warning: Ignored no-air-check registration for undefined surface node: "..dump(s), 2) end end end else biome_lib.dbg("Register with-air-checking mapgen hook: "..dump(nodes_or_function_or_model), 3) biome_lib.actionslist_aircheck[#biome_lib.actionslist_aircheck + 1] = { biomedef, nodes_or_function_or_model } local s = biomedef.surface if type(s) == "string" then if s and (string.find(s, "^group:") or minetest.registered_nodes[s]) then if not search_table(biome_lib.surfaceslist_aircheck, s) then biome_lib.surfaceslist_aircheck[#biome_lib.surfaceslist_aircheck + 1] = s end else biome_lib.dbg("Warning: Ignored with-air-checking registration for undefined surface node: "..dump(s), 2) end else for i = 1, #biomedef.surface do s = biomedef.surface[i] if s and (string.find(s, "^group:") or minetest.registered_nodes[s]) then if not search_table(biome_lib.surfaceslist_aircheck, s) then biome_lib.surfaceslist_aircheck[#biome_lib.surfaceslist_aircheck + 1] = s end else biome_lib.dbg("Warning: Ignored with-air-checking registration for undefined surface node: "..dump(s), 2) end end end end end -- Function to check whether a position matches the given biome definition -- Returns true when the surface can be populated local function populate_single_surface(biome, pos, perlin_fertile_area, checkair) local p_top = { x = pos.x, y = pos.y + 1, z = pos.z } if biome.rarity - biome.rarity_fertility == 100 then return end local fertility, temperature, humidity = get_biome_data(pos, perlin_fertile_area) if math.random() * 100 <= (biome.rarity - ((fertility + 1) / 2 * biome.rarity_fertility)) then return end local pos_biome_ok = pos.y >= biome.min_elevation and pos.y <= biome.max_elevation and fertility >= biome.plantlife_limit and temperature <= biome.temp_min and temperature >= biome.temp_max and humidity <= biome.humidity_min and humidity >= biome.humidity_max if not pos_biome_ok then return -- Y position mismatch, outside of biome end local biome_surfaces_string = dump(biome.surface) local surface_ok = false if not biome.depth then local dest_node = minetest.get_node(pos) if string.find(biome_surfaces_string, dest_node.name) then surface_ok = true else if string.find(biome_surfaces_string, "group:") then for j = 1, #biome.surface do if string.find(biome.surface[j], "^group:") and minetest.get_item_group(dest_node.name, biome.surface[j]) then surface_ok = true break end end end end elseif not string.find(biome_surfaces_string, minetest.get_node({ x = pos.x, y = pos.y-biome.depth-1, z = pos.z }).name) then surface_ok = true end if not surface_ok then return -- Surface does not match the given node group/name end if checkair and minetest.get_node(p_top).name ~= "air" then return end if biome.below_nodes and not string.find(dump(biome.below_nodes), minetest.get_node({x=pos.x, y=pos.y-1, z=pos.z}).name ) then return -- Node below does not match end if biome.ncount and #minetest.find_nodes_in_area( {x=pos.x-1, y=pos.y, z=pos.z-1}, {x=pos.x+1, y=pos.y, z=pos.z+1}, biome.neighbors ) <= biome.ncount then return -- Not enough similar biome nodes around end if biome.near_nodes and #minetest.find_nodes_in_area( {x=pos.x-biome.near_nodes_size, y=pos.y-biome.near_nodes_vertical, z=pos.z-biome.near_nodes_size}, {x=pos.x+biome.near_nodes_size, y=pos.y+biome.near_nodes_vertical, z=pos.z+biome.near_nodes_size}, biome.near_nodes ) < biome.near_nodes_count then return -- Long distance neighbours do not match end -- Position fits into given biome return true end function biome_lib.populate_surfaces(b, nodes_or_function_or_model, snodes, checkair) local items_added = 0 local biome = biome_lib.set_defaults(b) -- filter stage 1 - find nodes from the supplied surfaces that are within the current biome. local in_biome_nodes = {} local perlin_fertile_area = minetest.get_perlin(biome.seed_diff, biome_lib.fertile_perlin_octaves, biome_lib.fertile_perlin_persistence, biome_lib.fertile_perlin_scale) for i = 1, #snodes do local pos = vector.new(snodes[i]) if populate_single_surface(biome, pos, perlin_fertile_area, checkair) then in_biome_nodes[#in_biome_nodes + 1] = pos end end -- filter stage 2 - find places within that biome area to place the plants. local num_in_biome_nodes = #in_biome_nodes if num_in_biome_nodes == 0 then return 0 end for i = 1, math.min(math.ceil(biome.max_count/25), num_in_biome_nodes) do local tries = 0 local spawned = false while tries < biome.tries and not spawned do local pos = in_biome_nodes[math.random(1, num_in_biome_nodes)] local will_place = true local fdir = nil if biome.random_facedir then fdir = math.random(biome.random_facedir[1], biome.random_facedir[2]) end if biome.spawn_on_side then local onside = biome_lib.find_open_side(pos) if onside then pos = onside.newpos fdir = onside.facedir else will_place = false end elseif biome.spawn_on_bottom then if minetest.get_node({x=pos.x, y=pos.y-1, z=pos.z}).name == "air" then pos.y = pos.y - 1 else will_place = false end elseif biome.spawn_replace_node then pos.y = pos.y-1 end local p_top = { x = pos.x, y = pos.y + 1, z = pos.z } if will_place and not (biome.avoid_nodes and biome.avoid_radius and minetest.find_node_near(p_top, biome.avoid_radius + math.random(-1.5,2), biome.avoid_nodes)) then if biome.delete_above then minetest.swap_node(p_top, biome_lib.air) minetest.swap_node({x=p_top.x, y=p_top.y+1, z=p_top.z}, biome_lib.air) end if biome.delete_above_surround then minetest.swap_node({x=p_top.x-1, y=p_top.y, z=p_top.z}, biome_lib.air) minetest.swap_node({x=p_top.x+1, y=p_top.y, z=p_top.z}, biome_lib.air) minetest.swap_node({x=p_top.x, y=p_top.y, z=p_top.z-1}, biome_lib.air) minetest.swap_node({x=p_top.x, y=p_top.y, z=p_top.z+1}, biome_lib.air) minetest.swap_node({x=p_top.x-1, y=p_top.y+1, z=p_top.z}, biome_lib.air) minetest.swap_node({x=p_top.x+1, y=p_top.y+1, z=p_top.z}, biome_lib.air) minetest.swap_node({x=p_top.x, y=p_top.y+1, z=p_top.z-1}, biome_lib.air) minetest.swap_node({x=p_top.x, y=p_top.y+1, z=p_top.z+1}, biome_lib.air) end if biome.spawn_replace_node then minetest.swap_node(pos, biome_lib.air) end local objtype = type(nodes_or_function_or_model) if objtype == "table" then if nodes_or_function_or_model.axiom then biome_lib.generate_ltree(p_top, nodes_or_function_or_model) biome_lib.dbg("An L-tree was spawned at "..minetest.pos_to_string(p_top), 4) spawned = true else local n=nodes_or_function_or_model[math.random(#nodes_or_function_or_model)] minetest.swap_node(p_top, { name = n, param2 = fdir }) biome_lib.dbg("Node \""..n.."\" was randomly picked from a list and placed at ".. minetest.pos_to_string(p_top), 4) spawned = true end elseif objtype == "string" and minetest.registered_nodes[nodes_or_function_or_model] then minetest.swap_node(p_top, { name = nodes_or_function_or_model, param2 = fdir }) biome_lib.dbg("Node \""..nodes_or_function_or_model.."\" was placed at ".. minetest.pos_to_string(p_top), 4) spawned = true elseif objtype == "function" then nodes_or_function_or_model(pos, fdir) biome_lib.dbg("A function was run on surface node at "..minetest.pos_to_string(pos), 4) spawned = true elseif objtype == "string" and pcall(loadstring(("return %s(...)"): format(nodes_or_function_or_model)),pos) then spawned = true biome_lib.dbg("An obsolete string-specified function was run on surface node at ".. minetest.pos_to_string(p_top), 4) else biome_lib.dbg("Warning: Ignored invalid definition for object ".. dump(nodes_or_function_or_model).." that was pointed at {"..dump(pos).."}", 2) end else tries = tries + 1 end end if spawned then items_added = items_added + 1 end end return items_added end -- Primary log read-out/mapgen spawner local function confirm_block_surroundings(p) local n=minetest.get_node_or_nil(p) if not n or n.name == "ignore" then return false end for x = -32,32,64 do -- step of 64 causes it to only check the 8 corner blocks for y = -32,32,64 do for z = -32,32,64 do n = minetest.get_node_or_nil({x=p.x + x, y=p.y + y, z=p.z + z}) if not n or n.name == "ignore" then return false end end end end return true end function biome_lib.generate_block(shutting_down) if shutting_down then if #biome_lib.block_recheck_list > 0 then for i = 1, #biome_lib.block_recheck_list do biome_lib.block_log[#biome_lib.block_log + 1] = biome_lib.block_recheck_list[i] end biome_lib.block_recheck_list = {} end biome_lib.run_block_recheck_list = false else if biome_lib.run_block_recheck_list and not biome_lib.block_recheck_list[1] then biome_lib.run_block_recheck_list = false end end local blocklog = biome_lib.run_block_recheck_list and biome_lib.block_recheck_list or biome_lib.block_log if not blocklog[1] then return end local minp = blocklog[1][1] local maxp = blocklog[1][2] local airflag = blocklog[1][3] if not biome_lib.pos_hash then -- we need to read the maplock and get the surfaces list local now = minetest.get_us_time() biome_lib.pos_hash = {} minetest.load_area(minp) if not confirm_block_surroundings(minp) and not shutting_down -- if any neighbors appear not to be loaded and the block hasn't expired yet, defer it and (blocklog[1][4] + biome_lib.block_timeout) > now then if biome_lib.run_block_recheck_list then biome_lib.block_log[#biome_lib.block_log + 1] = table.copy(biome_lib.block_recheck_list[1]) table.remove(biome_lib.block_recheck_list, 1) else biome_lib.block_recheck_list[#biome_lib.block_recheck_list + 1] = table.copy(biome_lib.block_log[1]) table.remove(biome_lib.block_log, 1) end biome_lib.pos_hash = nil biome_lib.dbg("Mapblock at "..minetest.pos_to_string(minp).. " had a neighbor not fully emerged, skipped it for now.", 4) return else biome_lib.pos_hash.surface_node_list = airflag and minetest.find_nodes_in_area_under_air(minp, maxp, biome_lib.surfaceslist_aircheck) or minetest.find_nodes_in_area(minp, maxp, biome_lib.surfaceslist_no_aircheck) if #biome_lib.pos_hash.surface_node_list == 0 then biome_lib.dbg("Mapblock at "..minetest.pos_to_string(minp).." dequeued: no detected surfaces.", 4) table.remove(blocklog, 1) biome_lib.pos_hash = nil return else biome_lib.pos_hash.action_index = 1 biome_lib.dbg("Mapblock at "..minetest.pos_to_string(minp).. " has "..#biome_lib.pos_hash.surface_node_list.. " surface nodes to work on (airflag="..dump(airflag)..")", 4) end end elseif not (airflag and biome_lib.actionslist_aircheck[biome_lib.pos_hash.action_index]) and not (not airflag and biome_lib.actionslist_no_aircheck[biome_lib.pos_hash.action_index]) then -- the block is finished, remove it if #biome_lib.pos_hash.surface_node_list > 0 then biome_lib.dbg("Deleted mapblock "..minetest.pos_to_string(minp).." from the block log", 4) end table.remove(blocklog, 1) biome_lib.pos_hash = nil else -- below, [1] is biome, [2] is the thing to be added local added = 0 if airflag then if biome_lib.actionslist_aircheck[biome_lib.pos_hash.action_index] then added = biome_lib.populate_surfaces( biome_lib.actionslist_aircheck[biome_lib.pos_hash.action_index][1], biome_lib.actionslist_aircheck[biome_lib.pos_hash.action_index][2], biome_lib.pos_hash.surface_node_list, true) biome_lib.pos_hash.action_index = biome_lib.pos_hash.action_index + 1 end else if biome_lib.actionslist_no_aircheck[biome_lib.pos_hash.action_index] then added = biome_lib.populate_surfaces( biome_lib.actionslist_no_aircheck[biome_lib.pos_hash.action_index][1], biome_lib.actionslist_no_aircheck[biome_lib.pos_hash.action_index][2], biome_lib.pos_hash.surface_node_list, false) biome_lib.pos_hash.action_index = biome_lib.pos_hash.action_index + 1 end end if added > 0 then biome_lib.dbg("biome_lib.populate_surfaces ran on mapblock at ".. minetest.pos_to_string(minp)..". Entry #".. (biome_lib.pos_hash.action_index-1).." added "..added.." items.", 4) end end end -- The spawning ABM function biome_lib.register_active_spawner(sd,sp,sr,sc,ss,sa) local b = {} if type(sd) ~= "table" then b.spawn_delay = sd -- old api expects ABM interval param here. b.spawn_plants = {sp} b.avoid_radius = sr b.spawn_chance = sc b.spawn_surfaces = {ss} b.avoid_nodes = sa else b = sd end if b.spawn_delay*biome_lib.time_scale >= 1 then b.interval = b.spawn_delay*biome_lib.time_scale else b.interval = 1 end local biome = biome_lib.set_defaults(b) biome.spawn_plants_count = #(biome.spawn_plants) local n if type(biome.spawn_plants) == "table" then n = "random: "..biome.spawn_plants[1]..", ..." else n = biome.spawn_plants end biome.label = biome.label or "biome_lib spawn_on_surfaces(): "..n minetest.register_abm({ nodenames = biome.spawn_surfaces, interval = biome.interval, chance = biome.spawn_chance, neighbors = biome.neighbors, label = biome.label, action = function(pos, node, active_object_count, active_object_count_wider) local p_top = { x = pos.x, y = pos.y + 1, z = pos.z } local n_top = minetest.get_node(p_top) local perlin_fertile_area = minetest.get_perlin(biome.seed_diff, biome_lib.fertile_perlin_octaves, biome_lib.fertile_perlin_persistence, biome_lib.fertile_perlin_scale) local fertility, temperature, humidity = get_biome_data(pos, perlin_fertile_area) local pos_biome_ok = pos.y >= biome.min_elevation and pos.y <= biome.max_elevation and fertility > biome.plantlife_limit and temperature <= biome.temp_min and temperature >= biome.temp_max and humidity <= biome.humidity_min and humidity >= biome.humidity_max and biome_lib.is_node_loaded(p_top) if not pos_biome_ok then return -- Outside of biome end local n_light = minetest.get_node_light(p_top, nil) if n_light < biome.light_min or n_light > biome.light_max then return -- Too dark or too bright end if biome.avoid_nodes and biome.avoid_radius and minetest.find_node_near( p_top, biome.avoid_radius + math.random(-1.5,2), biome.avoid_nodes) then return -- Nodes to avoid are nearby end if biome.neighbors and biome.ncount and #minetest.find_nodes_in_area( {x=pos.x-1, y=pos.y, z=pos.z-1}, {x=pos.x+1, y=pos.y, z=pos.z+1}, biome.neighbors ) <= biome.ncount then return -- Near neighbour nodes are not present end local NEAR_DST = biome.near_nodes_size if biome.near_nodes and biome.near_nodes_count and biome.near_nodes_size and #minetest.find_nodes_in_area( {x=pos.x-NEAR_DST, y=pos.y-biome.near_nodes_vertical, z=pos.z-NEAR_DST}, {x=pos.x+NEAR_DST, y=pos.y+biome.near_nodes_vertical, z=pos.z+NEAR_DST}, biome.near_nodes ) < biome.near_nodes_count then return -- Far neighbour nodes are not present end if (biome.air_count and biome.air_size) and #minetest.find_nodes_in_area( {x=p_top.x-biome.air_size, y=p_top.y, z=p_top.z-biome.air_size}, {x=p_top.x+biome.air_size, y=p_top.y, z=p_top.z+biome.air_size}, "air" ) < biome.air_count then return -- Not enough air end local walldir = biome_lib.find_adjacent_wall(p_top, biome.verticals_list, biome.choose_random_wall) if biome.alt_wallnode and walldir then if n_top.name == "air" then minetest.swap_node(p_top, { name = biome.alt_wallnode, param2 = walldir }) end return end local currentsurface = minetest.get_node(pos).name if biome_lib.default_water_nodes[currentsurface] and #minetest.find_nodes_in_area( {x=pos.x, y=pos.y-biome.depth_max-1, z=pos.z}, vector.new(pos), biome_lib.default_wet_surfaces ) == 0 then return -- On water but no ground nearby end local rnd = math.random(1, biome.spawn_plants_count) local plant_to_spawn = biome.spawn_plants[rnd] local fdir = biome.facedir if biome.random_facedir then fdir = math.random(biome.random_facedir[1],biome.random_facedir[2]) end if type(biome.spawn_plants) == "string" then assert(loadstring(biome.spawn_plants.."(...)"))(pos) elseif not biome.spawn_on_side and not biome.spawn_on_bottom and not biome.spawn_replace_node then if n_top.name == "air" then minetest.swap_node(p_top, { name = plant_to_spawn, param2 = fdir }) end elseif biome.spawn_replace_node then minetest.swap_node(pos, { name = plant_to_spawn, param2 = fdir }) elseif biome.spawn_on_side then local onside = biome_lib.find_open_side(pos) if onside then minetest.swap_node(onside.newpos, { name = plant_to_spawn, param2 = onside.facedir }) end elseif biome.spawn_on_bottom then if minetest.get_node({x=pos.x, y=pos.y-1, z=pos.z}).name == "air" then minetest.swap_node({x=pos.x, y=pos.y-1, z=pos.z}, { name = plant_to_spawn, param2 = fdir} ) end end end }) end -- Function to decide how to replace a plant - either grow it, replace it with -- a tree, run a function, or die with an error. function biome_lib.replace_plant(pos, replacement, grow_function, walldir, seeddiff) local growtype = type(grow_function) if growtype == "table" then minetest.swap_node(pos, biome_lib.air) biome_lib.grow_ltree(pos, grow_function) return elseif growtype == "function" then local perlin_fertile_area = minetest.get_perlin(seeddiff, biome_lib.fertile_perlin_octaves, biome_lib.fertile_perlin_persistence, biome_lib.fertile_perlin_scale) local fertility, temperature, _ = get_biome_data(pos, perlin_fertile_area) grow_function(pos, fertility, temperature, walldir) return elseif growtype == "string" then local perlin_fertile_area = minetest.get_perlin(seeddiff, biome_lib.fertile_perlin_octaves, biome_lib.fertile_perlin_persistence, biome_lib.fertile_perlin_scale) local fertility, temperature, _ = get_biome_data(pos, perlin_fertile_area) assert(loadstring(grow_function.."(...)"))(pos, fertility, temperature, walldir) return elseif growtype == "nil" then minetest.swap_node(pos, { name = replacement, param2 = walldir}) return elseif growtype ~= "nil" and growtype ~= "string" and growtype ~= "table" then error("Invalid grow function "..dump(grow_function).." used on object at ("..dump(pos)..")") end end -- Check for infinite stacks if minetest.get_modpath("unified_inventory") or not minetest.settings:get_bool("creative_mode") then biome_lib.expect_infinite_stacks = false else biome_lib.expect_infinite_stacks = true end -- read a field from a node's definition function biome_lib.get_nodedef_field(nodename, fieldname) if not minetest.registered_nodes[nodename] then return nil end return minetest.registered_nodes[nodename][fieldname] end