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244dcb4822
biome_lib/init.lua
Vanessa Dannenberg 244dcb4822 Speed improvements 
replace all set_node() and remove_node() calls with swap_node()
also move a get_node() check to later in its list of tests
to do the "cheap" stuff first
2018-10-25 09:45:51 -04:00

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-- Plantlife library mod by Vanessa Ezekowitz
--
-- License: WTFPL
--
-- I got the temperature map idea from "hmmmm", values used for it came from
-- Splizard's snow mod.
--
-- Various settings - most of these probably won't need to be changed
biome_lib = {}
plantslib = setmetatable({}, { __index=function(t,k) print("Use of deprecated function:", k) return biome_lib[k] end })
biome_lib.blocklist_aircheck = {}
biome_lib.blocklist_no_aircheck = {}
biome_lib.surface_nodes_aircheck = {}
biome_lib.surface_nodes_no_aircheck = {}
biome_lib.surfaceslist_aircheck = {}
biome_lib.surfaceslist_no_aircheck = {}
biome_lib.actioncount_aircheck = {}
biome_lib.actioncount_no_aircheck = {}
biome_lib.actionslist_aircheck = {}
biome_lib.actionslist_no_aircheck = {}
biome_lib.modpath = minetest.get_modpath("biome_lib")
biome_lib.total_no_aircheck_calls = 0
biome_lib.queue_run_ratio = tonumber(minetest.settings:get("biome_lib_queue_run_ratio")) or 100
-- Boilerplate to support localized strings if intllib mod is installed.
local S
if minetest.get_modpath("intllib") then
S = intllib.Getter()
else
S = function(s) return s end
end
biome_lib.intllib = S
local DEBUG = false --... except if you want to spam the console with debugging info :-)
function biome_lib:dbg(msg)
if DEBUG then
print("[Plantlife] "..msg)
minetest.log("verbose", "[Plantlife] "..msg)
end
end
biome_lib.plantlife_seed_diff = 329 -- needs to be global so other mods can see it
local perlin_octaves = 3
local perlin_persistence = 0.6
local perlin_scale = 100
local temperature_seeddiff = 112
local temperature_octaves = 3
local temperature_persistence = 0.5
local temperature_scale = 150
local humidity_seeddiff = 9130
local humidity_octaves = 3
local humidity_persistence = 0.5
local humidity_scale = 250
local time_scale = 1
local time_speed = tonumber(minetest.settings:get("time_speed"))
if time_speed and time_speed > 0 then
time_scale = 72 / time_speed
end
--PerlinNoise(seed, octaves, persistence, scale)
biome_lib.perlin_temperature = PerlinNoise(temperature_seeddiff, temperature_octaves, temperature_persistence, temperature_scale)
biome_lib.perlin_humidity = PerlinNoise(humidity_seeddiff, humidity_octaves, humidity_persistence, humidity_scale)
-- Local functions
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 -31000
biome.max_elevation = biome.max_elevation or 31000
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.max_count = biome.max_count or 5
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
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_generate_plant(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))
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))
end
if biomedef.check_air == false then
biome_lib:dbg("Register no-air-check mapgen hook: "..dump(nodes_or_function_or_model))
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))
end
else
for i = 1, #biomedef.surface do
local 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))
end
end
end
else
biome_lib:dbg("Register with-air-checking mapgen hook: "..dump(nodes_or_function_or_model))
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))
end
else
for i = 1, #biomedef.surface do
local 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))
end
end
end
end
end
function biome_lib:populate_surfaces(biome, nodes_or_function_or_model, snodes, checkair)
biome_lib:set_defaults(biome)
-- 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, perlin_octaves, perlin_persistence, perlin_scale)
for i = 1, #snodes do
local pos = snodes[i]
local p_top = { x = pos.x, y = pos.y + 1, z = pos.z }
local noise1 = perlin_fertile_area:get2d({x=pos.x, y=pos.z})
local noise2 = biome_lib.perlin_temperature:get2d({x=pos.x, y=pos.z})
local noise3 = biome_lib.perlin_humidity:get2d({x=pos.x+150, y=pos.z+50})
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 surface_ok
and pos.y >= biome.min_elevation
and pos.y <= biome.max_elevation
and noise1 > biome.plantlife_limit
and noise2 <= biome.temp_min
and noise2 >= biome.temp_max
and noise3 <= biome.humidity_min
and noise3 >= biome.humidity_max
and (not checkair or minetest.get_node(p_top).name == "air")
and (not biome.ncount or #(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)
and (not biome.near_nodes or #(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)
and math.random(1,100) > biome.rarity
and (not biome.below_nodes or string.find(dump(biome.below_nodes), minetest.get_node({x=pos.x, y=pos.y-1, z=pos.z}).name) )
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
for i = 1, math.min(biome.max_count, num_in_biome_nodes) do
local tries = 0
local spawned = false
while tries < 2 and not spawned do
local pos = in_biome_nodes[math.random(1, num_in_biome_nodes)]
if 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 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, {name ="air"})
minetest.swap_node({x=p_top.x, y=p_top.y+1, z=p_top.z}, {name ="air"})
end
if biome.delete_above_surround then
minetest.swap_node({x=p_top.x-1, y=p_top.y, z=p_top.z}, {name ="air"})
minetest.swap_node({x=p_top.x+1, y=p_top.y, z=p_top.z}, {name ="air"})
minetest.swap_node({x=p_top.x, y=p_top.y, z=p_top.z-1}, {name ="air"})
minetest.swap_node({x=p_top.x, y=p_top.y, z=p_top.z+1}, {name ="air"})
minetest.swap_node({x=p_top.x-1, y=p_top.y+1, z=p_top.z}, {name ="air"})
minetest.swap_node({x=p_top.x+1, y=p_top.y+1, z=p_top.z}, {name ="air"})
minetest.swap_node({x=p_top.x, y=p_top.y+1, z=p_top.z-1}, {name ="air"})
minetest.swap_node({x=p_top.x, y=p_top.y+1, z=p_top.z+1}, {name ="air"})
end
if biome.spawn_replace_node then
minetest.swap_node(pos, {name ="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_tree(p_top, nodes_or_function_or_model)
spawned = true
else
local fdir = nil
if biome.random_facedir then
fdir = math.random(biome.random_facedir[1], biome.random_facedir[2])
end
minetest.swap_node(p_top, { name = nodes_or_function_or_model[math.random(#nodes_or_function_or_model)], param2 = fdir })
spawned = true
end
elseif objtype == "string" and
minetest.registered_nodes[nodes_or_function_or_model] then
local fdir = nil
if biome.random_facedir then
fdir = math.random(biome.random_facedir[1], biome.random_facedir[2])
end
minetest.swap_node(p_top, { name = nodes_or_function_or_model, param2 = fdir })
spawned = true
elseif objtype == "function" then
nodes_or_function_or_model(pos)
spawned = true
elseif objtype == "string" and pcall(loadstring(("return %s(...)"):
format(nodes_or_function_or_model)),pos) then
spawned = true
else
biome_lib:dbg("Warning: Ignored invalid definition for object "..dump(nodes_or_function_or_model).." that was pointed at {"..dump(pos).."}")
end
else
tries = tries + 1
end
end
end
end
end
-- Primary mapgen spawner, for mods that can work with air checking enabled on
-- a surface during the initial map read stage.
function biome_lib:generate_block_with_air_checking()
if #biome_lib.blocklist_aircheck > 0 then
local minp = biome_lib.blocklist_aircheck[1][1]
local maxp = biome_lib.blocklist_aircheck[1][2]
-- use the block hash as a unique key into the surface nodes
-- tables, so that we can write the tables thread-safely.
local blockhash = minetest.hash_node_position(minp)
if not biome_lib.surface_nodes_aircheck.blockhash then
if type(minetest.find_nodes_in_area_under_air) == "function" then -- use newer API call
biome_lib.surface_nodes_aircheck.blockhash =
minetest.find_nodes_in_area_under_air(minp, maxp, biome_lib.surfaceslist_aircheck)
else
local search_area = minetest.find_nodes_in_area(minp, maxp, biome_lib.surfaceslist_aircheck)
-- search the generated block for air-bounded surfaces the slow way.
biome_lib.surface_nodes_aircheck.blockhash = {}
for i = 1, #search_area do
local pos = search_area[i]
local p_top = { x=pos.x, y=pos.y+1, z=pos.z }
if minetest.get_node(p_top).name == "air" then
biome_lib.surface_nodes_aircheck.blockhash[#biome_lib.surface_nodes_aircheck.blockhash + 1] = pos
end
end
end
biome_lib.actioncount_aircheck.blockhash = 1
else
if biome_lib.actioncount_aircheck.blockhash <= #biome_lib.actionslist_aircheck then
-- [1] is biome, [2] is node/function/model
biome_lib:populate_surfaces(
biome_lib.actionslist_aircheck[biome_lib.actioncount_aircheck.blockhash][1],
biome_lib.actionslist_aircheck[biome_lib.actioncount_aircheck.blockhash][2],
biome_lib.surface_nodes_aircheck.blockhash, true)
biome_lib.actioncount_aircheck.blockhash = biome_lib.actioncount_aircheck.blockhash + 1
else
if biome_lib.surface_nodes_aircheck.blockhash then
table.remove(biome_lib.blocklist_aircheck, 1)
biome_lib.surface_nodes_aircheck.blockhash = nil
end
end
end
end
end
-- Secondary mapgen spawner, for mods that require disabling of
-- checking for air during the initial map read stage.
function biome_lib:generate_block_no_aircheck()
if #biome_lib.blocklist_no_aircheck > 0 then
local minp = biome_lib.blocklist_no_aircheck[1][1]
local maxp = biome_lib.blocklist_no_aircheck[1][2]
local blockhash = minetest.hash_node_position(minp)
if not biome_lib.surface_nodes_no_aircheck.blockhash then
-- directly read the block to be searched into the chunk cache
biome_lib.surface_nodes_no_aircheck.blockhash =
minetest.find_nodes_in_area(minp, maxp, biome_lib.surfaceslist_no_aircheck)
biome_lib.actioncount_no_aircheck.blockhash = 1
else
if biome_lib.actioncount_no_aircheck.blockhash <= #biome_lib.actionslist_no_aircheck then
biome_lib:populate_surfaces(
biome_lib.actionslist_no_aircheck[biome_lib.actioncount_no_aircheck.blockhash][1],
biome_lib.actionslist_no_aircheck[biome_lib.actioncount_no_aircheck.blockhash][2],
biome_lib.surface_nodes_no_aircheck.blockhash, false)
biome_lib.actioncount_no_aircheck.blockhash = biome_lib.actioncount_no_aircheck.blockhash + 1
else
if biome_lib.surface_nodes_no_aircheck.blockhash then
table.remove(biome_lib.blocklist_no_aircheck, 1)
biome_lib.surface_nodes_no_aircheck.blockhash = nil
end
end
end
end
end
-- "Record" the chunks being generated by the core mapgen
minetest.register_on_generated(function(minp, maxp, blockseed)
biome_lib.blocklist_aircheck[#biome_lib.blocklist_aircheck + 1] = { minp, maxp }
end)
minetest.register_on_generated(function(minp, maxp, blockseed)
biome_lib.blocklist_no_aircheck[#biome_lib.blocklist_no_aircheck + 1] = { minp, maxp }
end)
-- "Play" them back, populating them with new stuff in the process
minetest.register_globalstep(function(dtime)
if dtime < 0.2 -- don't attempt to populate if lag is already too high
and math.random(100) <= biome_lib.queue_run_ratio
and (#biome_lib.blocklist_aircheck > 0 or #biome_lib.blocklist_no_aircheck > 0) then
biome_lib.globalstep_start_time = minetest.get_us_time()
biome_lib.globalstep_runtime = 0
while (#biome_lib.blocklist_aircheck > 0 or #biome_lib.blocklist_no_aircheck > 0)
and biome_lib.globalstep_runtime < 200000 do -- 0.2 seconds, in uS.
if #biome_lib.blocklist_aircheck > 0 then
biome_lib:generate_block_with_air_checking()
end
if #biome_lib.blocklist_no_aircheck > 0 then
biome_lib:generate_block_no_aircheck()
end
biome_lib.globalstep_runtime = minetest.get_us_time() - biome_lib.globalstep_start_time
end
end
end)
-- Play out the entire log all at once on shutdown
-- to prevent unpopulated map areas
minetest.register_on_shutdown(function()
if #biome_lib.blocklist_aircheck > 0 then
print("[biome_lib] Stand by, playing out the rest of the aircheck mapblock log")
print("(there are "..#biome_lib.blocklist_aircheck.." entries)...")
while true do
biome_lib:generate_block_with_air_checking(0.1)
if #biome_lib.blocklist_aircheck == 0 then return end
end
end
end)
minetest.register_on_shutdown(function()
if #biome_lib.blocklist_no_aircheck > 0 then
print("[biome_lib] Stand by, playing out the rest of the no-aircheck mapblock log")
print("(there are "..#biome_lib.blocklist_no_aircheck.." entries)...")
while true do
biome_lib:generate_block_no_aircheck(0.1)
if #biome_lib.blocklist_no_aircheck == 0 then return end
end
end
end)
-- The spawning ABM
function biome_lib:spawn_on_surfaces(sd,sp,sr,sc,ss,sa)
local biome = {}
if type(sd) ~= "table" then
biome.spawn_delay = sd -- old api expects ABM interval param here.
biome.spawn_plants = {sp}
biome.avoid_radius = sr
biome.spawn_chance = sc
biome.spawn_surfaces = {ss}
biome.avoid_nodes = sa
else
biome = sd
end
if biome.spawn_delay*time_scale >= 1 then
biome.interval = biome.spawn_delay*time_scale
else
biome.interval = 1
end
biome_lib:set_defaults(biome)
biome.spawn_plants_count = #(biome.spawn_plants)
minetest.register_abm({
nodenames = biome.spawn_surfaces,
interval = biome.interval,
chance = biome.spawn_chance,
neighbors = biome.neighbors,
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, perlin_octaves, perlin_persistence, perlin_scale)
local noise1 = perlin_fertile_area:get2d({x=p_top.x, y=p_top.z})
local noise2 = biome_lib.perlin_temperature:get2d({x=p_top.x, y=p_top.z})
local noise3 = biome_lib.perlin_humidity:get2d({x=p_top.x+150, y=p_top.z+50})
if noise1 > biome.plantlife_limit
and noise2 <= biome.temp_min
and noise2 >= biome.temp_max
and noise3 <= biome.humidity_min
and noise3 >= biome.humidity_max
and biome_lib:is_node_loaded(p_top) then
local n_light = minetest.get_node_light(p_top, nil)
if 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))
and n_light >= biome.light_min
and n_light <= biome.light_max
and (not(biome.neighbors and biome.ncount) or #(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 )
and (not(biome.near_nodes and biome.near_nodes_count and biome.near_nodes_size) or #(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)
and (not(biome.air_count and biome.air_size) or #(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)
and pos.y >= biome.min_elevation
and pos.y <= biome.max_elevation
then
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
else
local currentsurface = minetest.get_node(pos).name
if currentsurface ~= "default:water_source"
or (currentsurface == "default:water_source" and #(minetest.find_nodes_in_area({x=pos.x, y=pos.y-biome.depth_max-1, z=pos.z}, {x=pos.x, y=pos.y, z=pos.z}, {"default:dirt", "default:dirt_with_grass", "default:sand"})) > 0 )
then
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
end
end
end
})
end
-- The growing ABM
function biome_lib:grow_plants(opts)
local options = opts
options.height_limit = options.height_limit or 5
options.ground_nodes = options.ground_nodes or { "default:dirt_with_grass" }
options.grow_nodes = options.grow_nodes or { "default:dirt_with_grass" }
options.seed_diff = options.seed_diff or 0
if options.grow_delay*time_scale >= 1 then
options.interval = options.grow_delay*time_scale
else
options.interval = 1
end
minetest.register_abm({
nodenames = { options.grow_plant },
interval = options.interval,
chance = options.grow_chance,
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 p_bot = {x=pos.x, y=pos.y-1, z=pos.z}
local n_top = minetest.get_node(p_top)
local n_bot = minetest.get_node(p_bot)
local root_node = minetest.get_node({x=pos.x, y=pos.y-options.height_limit, z=pos.z})
local walldir = nil
if options.need_wall and options.verticals_list then
walldir = biome_lib:find_adjacent_wall(p_top, options.verticals_list, options.choose_random_wall)
end
if (n_top.name == "air" or n_top.name == "default:snow")
and (not options.need_wall or (options.need_wall and walldir)) then
-- corner case for changing short junglegrass
-- to dry shrub in desert
if n_bot.name == options.dry_early_node and options.grow_plant == "junglegrass:short" then
minetest.swap_node(pos, { name = "default:dry_shrub" })
elseif options.grow_vertically and walldir then
if biome_lib:search_downward(pos, options.height_limit, options.ground_nodes) then
minetest.swap_node(p_top, { name = options.grow_plant, param2 = walldir})
end
elseif not options.grow_result and not options.grow_function then
minetest.swap_node(pos, {name="air"})
else
biome_lib:replace_object(pos, options.grow_result, options.grow_function, options.facedir, options.seed_diff)
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_object(pos, replacement, grow_function, walldir, seeddiff)
local growtype = type(grow_function)
if growtype == "table" then
minetest.swap_node(pos, {name="air"})
biome_lib:grow_tree(pos, grow_function)
return
elseif growtype == "function" then
local perlin_fertile_area = minetest.get_perlin(seeddiff, perlin_octaves, perlin_persistence, perlin_scale)
local noise1 = perlin_fertile_area:get2d({x=pos.x, y=pos.z})
local noise2 = biome_lib.perlin_temperature:get2d({x=pos.x, y=pos.z})
grow_function(pos,noise1,noise2,walldir)
return
elseif growtype == "string" then
local perlin_fertile_area = minetest.get_perlin(seeddiff, perlin_octaves, perlin_persistence, perlin_scale)
local noise1 = perlin_fertile_area:get2d({x=pos.x, y=pos.z})
local noise2 = biome_lib.perlin_temperature:get2d({x=pos.x, y=pos.z})
assert(loadstring(grow_function.."(...)"))(pos,noise1,noise2,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
-- function to decide if a node has a wall that's in verticals_list{}
-- returns wall direction of valid node, or nil if invalid.
function biome_lib:find_adjacent_wall(pos, verticals, randomflag)
local verts = dump(verticals)
if randomflag then
local walltab = {}
if string.find(verts, minetest.get_node({ x=pos.x-1, y=pos.y, z=pos.z }).name) then walltab[#walltab + 1] = 3 end
if string.find(verts, minetest.get_node({ x=pos.x+1, y=pos.y, z=pos.z }).name) then walltab[#walltab + 1] = 2 end
if string.find(verts, minetest.get_node({ x=pos.x , y=pos.y, z=pos.z-1 }).name) then walltab[#walltab + 1] = 5 end
if string.find(verts, minetest.get_node({ x=pos.x , y=pos.y, z=pos.z+1 }).name) then walltab[#walltab + 1] = 4 end
if #walltab > 0 then return walltab[math.random(1, #walltab)] end
else
if string.find(verts, minetest.get_node({ x=pos.x-1, y=pos.y, z=pos.z }).name) then return 3 end
if string.find(verts, minetest.get_node({ x=pos.x+1, y=pos.y, z=pos.z }).name) then return 2 end
if string.find(verts, minetest.get_node({ x=pos.x , y=pos.y, z=pos.z-1 }).name) then return 5 end
if string.find(verts, minetest.get_node({ x=pos.x , y=pos.y, z=pos.z+1 }).name) then return 4 end
end
return nil
end
-- Function to search downward from the given position, looking for the first
-- node that matches the ground table. Returns the new position, or nil if
-- height limit is exceeded before finding it.
function biome_lib:search_downward(pos, heightlimit, ground)
for i = 0, heightlimit do
if string.find(dump(ground), minetest.get_node({x=pos.x, y=pos.y-i, z = pos.z}).name) then
return {x=pos.x, y=pos.y-i, z = pos.z}
end
end
return false
end
function biome_lib:find_open_side(pos)
if minetest.get_node({ x=pos.x-1, y=pos.y, z=pos.z }).name == "air" then
return {newpos = { x=pos.x-1, y=pos.y, z=pos.z }, facedir = 2}
end
if minetest.get_node({ x=pos.x+1, y=pos.y, z=pos.z }).name == "air" then
return {newpos = { x=pos.x+1, y=pos.y, z=pos.z }, facedir = 3}
end
if minetest.get_node({ x=pos.x, y=pos.y, z=pos.z-1 }).name == "air" then
return {newpos = { x=pos.x, y=pos.y, z=pos.z-1 }, facedir = 4}
end
if minetest.get_node({ x=pos.x, y=pos.y, z=pos.z+1 }).name == "air" then
return {newpos = { x=pos.x, y=pos.y, z=pos.z+1 }, facedir = 5}
end
return nil
end
-- spawn_tree() on generate is routed through here so that other mods can hook
-- into it.
function biome_lib:generate_tree(pos, nodes_or_function_or_model)
minetest.spawn_tree(pos, nodes_or_function_or_model)
end
-- and this one's for the call used in the growing code
function biome_lib:grow_tree(pos, nodes_or_function_or_model)
minetest.spawn_tree(pos, nodes_or_function_or_model)
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
print("[Biome Lib] Loaded")
minetest.after(0, function()
print("[Biome Lib] Registered a total of "..(#biome_lib.surfaceslist_aircheck)+(#biome_lib.surfaceslist_no_aircheck).." surface types to be evaluated, spread")
print("[Biome Lib] across "..#biome_lib.actionslist_aircheck.." actions with air-checking and "..#biome_lib.actionslist_no_aircheck.." actions without.")
end)
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