Use engine decorations when possible

API.txt

@@ -332,7 +332,6 @@ will be called in the form:
 
 	somefunction(pos)
 
-
 =====
 biome_lib.update_plant(options)
 
@@ -496,7 +495,6 @@ Perlin noise used.
 The first one is for a "fertile ground" layer, which I tend to refer to as the
 generic "stuff can potentially grow here" layer.  Its values are hard-coded:
 
-	biome_lib.plantlife_seed_diff = 329
 	perlin_octaves = 3
 	perlin_persistence = 0.6
 	perlin_scale = 100
@@ -593,3 +591,66 @@ See settingtypes.txt for a list.  Any item listed there can be changed either
 by adding it to your minetest.conf, or by using the "all settings" menu in
 Minetest, whatever's appropriate for your particular setup.
 
+==================
+Engine Decorations
+==================
+
+If a call to biome_lib.register_on_generate() contains items and biome
+definition settings that are suitable, biome_lib will pass that call on to the
+engine instead, to use its built-in decorations feature, since it'll be much
+faster than Lua.
+
+For this to work, first the item to be added must either be a node, or a
+table with a list of nodes that biome_lib would normally pick from randomly.
+That is to say, you cannot specify an L-tree or a function here, as the engine
+does not support that sort of thing (biome_lib will just switch to its normal
+handling if you do).
+
+Second, these biome definition items must not be present:
+
+* below_nodes
+* avoid_nodes
+* avoid_radius
+* neighbors
+* ncount
+* depth
+* near_nodes_size
+* near_nodes_vertical
+* temp_min
+* temp_max
+* verticals_list
+* delete_above
+* delete_above_surround
+
+The plantlife_limit definition item is ignored when checking if a particular
+call can be routed to the engine.
+
+The call given to the engine will use the remaining biome definition items in
+the following manner:
+
+deco_type =		"simple",
+flags =			"all_floors"
+decoration =	node or table with node list
+place_on =		surface
+y_min =			min_elevation
+y_max =			max_elevation
+spawn_by =		near_nodes
+num_spawn_by = 	near_nodes_count
+param2 = 		\_ set to the range specified by the biome definition's
+param2_max = 	/  random_facedir table, if present, otherwise omitted
+noise_params = {
+	octaves = biome_lib.fertile_perlin_octaves,
+	persist = biome_lib.fertile_perlin_persistence * (250/biome_lib.fertile_perlin_scale),
+	scale = ((100-biome.rarity)/100) * (math.min(biome.max_count, 6400)/6400),
+	seed = biome.seed_diff,
+	offset = 0,
+	spread = {x = 100, y = 100, z = 100},
+	lacunarity = 2,
+	flags = "absvalue"
+}
+
+If the biome definition's check_air setting is false, "force_placement" is
+added to the decoration's flags setting.
+
+If the biome def's spawn_replace_node is set to true, the decoration's
+place_offset_y is set to -1 (otherwise it is omitted).

api.lua

@@ -8,9 +8,11 @@ biome_lib.actionslist_no_aircheck = {}
 biome_lib.surfaceslist_aircheck = {}
 biome_lib.surfaceslist_no_aircheck = {}
 
-local perlin_octaves = 3
+biome_lib.registered_decorations = {}
-local perlin_persistence = 0.6
+
-local perlin_scale = 100
+biome_lib.fertile_perlin_octaves = 3
+biome_lib.fertile_perlin_persistence = 0.6
+biome_lib.fertile_perlin_scale = 100
 
 local temperature_seeddiff = 112
 local temperature_octaves = 3
@@ -39,7 +41,6 @@ biome_lib.mapgen_elevation_limit = { ["min"] = -16, ["max"] = 48 }
 
 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)
-biome_lib.plantlife_seed_diff = 329 -- needs to be global so other mods can see it
 
 -- Local functions
 
@@ -80,6 +81,7 @@ function biome_lib.is_node_loaded(node_pos)
 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
@@ -105,6 +107,7 @@ function biome_lib.set_defaults(biome)
 	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)
@@ -137,7 +140,14 @@ function biome_lib.register_on_generate(biomedef, nodes_or_function_or_model)
 	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)
 
-	if biomedef.check_air == false then 
+	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
@@ -269,15 +279,15 @@ local function populate_single_surface(biome, pos, perlin_fertile_area, checkair
 	return true
 end
 
-function biome_lib.populate_surfaces(biome, nodes_or_function_or_model, snodes, checkair)
+function biome_lib.populate_surfaces(b, nodes_or_function_or_model, snodes, checkair)
 	local items_added = 0
 
-	biome_lib.set_defaults(biome)
+	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, perlin_octaves, perlin_persistence, perlin_scale)
+	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])
@@ -490,112 +500,31 @@ function biome_lib.generate_block(shutting_down)
 	end
 end
 
--- "Play" them back, populating them with new stuff in the process
-
-minetest.register_globalstep(function(dtime)
-	if not biome_lib.block_log[1] then return end -- the block log is empty
-
-	if math.random(100) > biome_lib.queue_ratio then return end
-	for s = 1, biome_lib.entries_per_step do
-		biome_lib.generate_block()
-	end
-end)
-
--- Periodically wake-up the queue to give old blocks a chance to time-out
--- if the player isn't currently exploring (i.e. they're just playing in one area)
-
-function biome_lib.wake_up_queue()
-	if #biome_lib.block_recheck_list > 1
-	  and #biome_lib.block_log == 0 then
-		biome_lib.block_log[#biome_lib.block_log + 1] =
-			table.copy(biome_lib.block_recheck_list[#biome_lib.block_recheck_list])
-		biome_lib.block_recheck_list[#biome_lib.block_recheck_list] = nil
-		biome_lib.run_block_recheck_list = true
-		biome_lib.dbg("Woke-up the map queue to give old blocks a chance to time-out.", 3)
-	end
-	minetest.after(biome_lib.block_queue_wakeup_time, biome_lib.wake_up_queue)
-end
-
-biome_lib.wake_up_queue()
-
--- Play out the entire log all at once on shutdown
--- to prevent unpopulated map areas
-
-local function format_time(t)
-	if t > 59999999 then
-		return os.date("!%M minutes and %S seconds", math.ceil(t/1000000))
-	else
-		return os.date("!%S seconds", math.ceil(t/1000000))
-	end
-end
-
-function biome_lib.check_remaining_time()
-	if minetest.get_us_time() > (biome_lib.shutdown_last_timestamp + 10000000) then -- report progress every 10s
-		biome_lib.shutdown_last_timestamp = minetest.get_us_time()
-
-		local entries_remaining = #biome_lib.block_log + #biome_lib.block_recheck_list
-
-		local total_purged = biome_lib.starting_count - entries_remaining
-		local elapsed_time = biome_lib.shutdown_last_timestamp - biome_lib.shutdown_start_time
-		biome_lib.dbg(string.format("%i entries, approximately %s remaining.",
-			entries_remaining, format_time(elapsed_time/total_purged * entries_remaining)))
-	end
-end
-
-minetest.register_on_shutdown(function()
-	biome_lib.shutdown_start_time = minetest.get_us_time()
-	biome_lib.shutdown_last_timestamp = minetest.get_us_time()+1
-
-	biome_lib.starting_count = #biome_lib.block_log + #biome_lib.block_recheck_list
-
-	if biome_lib.starting_count == 0 then
-		return
-	end
-
-	biome_lib.dbg("Stand by, purging the mapblock log "..
-		"(there are "..biome_lib.starting_count.." entries) ...", 0)
-
-	while #biome_lib.block_log > 0 do
-		biome_lib.generate_block(true)
-		biome_lib.check_remaining_time()
-	end
-
-	if #biome_lib.block_recheck_list > 0 then
-		biome_lib.block_log = table.copy(biome_lib.block_recheck_list)
-		biome_lib.block_recheck_list = {}
-		while #biome_lib.block_log > 0 do
-			biome_lib.generate_block(true)
-			biome_lib.check_remaining_time()
-		end
-	end
-	biome_lib.dbg("Log purge completed after "..
-		format_time(minetest.get_us_time() - biome_lib.shutdown_start_time)..".", 0)
-end)
-
 -- The spawning ABM
 
 function biome_lib.register_active_spawner(sd,sp,sr,sc,ss,sa)
 
-	local biome = {}
+	local b = {}
 
 	if type(sd) ~= "table" then
-		biome.spawn_delay = sd	-- old api expects ABM interval param here.
+		b.spawn_delay = sd	-- old api expects ABM interval param here.
-		biome.spawn_plants = {sp}
+		b.spawn_plants = {sp}
-		biome.avoid_radius = sr
+		b.avoid_radius = sr
-		biome.spawn_chance = sc
+		b.spawn_chance = sc
-		biome.spawn_surfaces = {ss}
+		b.spawn_surfaces = {ss}
-		biome.avoid_nodes = sa
+		b.avoid_nodes = sa
 	else
-		biome = sd
+		b = sd
 	end
 
-	if biome.spawn_delay*biome_lib.time_scale >= 1 then
+	if b.spawn_delay*biome_lib.time_scale >= 1 then
-		biome.interval = biome.spawn_delay*biome_lib.time_scale
+		b.interval = b.spawn_delay*biome_lib.time_scale
 	else
-		biome.interval = 1
+		b.interval = 1
 	end
 
-	biome_lib.set_defaults(biome)
+	local biome = biome_lib.set_defaults(b)
+
 	biome.spawn_plants_count = #(biome.spawn_plants)
 
 	local n
@@ -615,7 +544,7 @@ function biome_lib.register_active_spawner(sd,sp,sr,sc,ss,sa)
 		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 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)
 
@@ -725,12 +654,12 @@ function biome_lib.replace_plant(pos, replacement, grow_function, walldir, seedd
 		biome_lib.grow_ltree(pos, grow_function)
 		return
 	elseif growtype == "function" then
-		local perlin_fertile_area = minetest.get_perlin(seeddiff, perlin_octaves, perlin_persistence, perlin_scale)
+		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, perlin_octaves, perlin_persistence, perlin_scale)
+		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
@@ -758,28 +687,3 @@ function biome_lib.get_nodedef_field(nodename, fieldname)
 	end
 	return minetest.registered_nodes[nodename][fieldname]
 end
-
-if biome_lib.debug_log_level >= 3 then
-	biome_lib.last_count = 0
-
-	function biome_lib.show_pending_block_count()
-		if biome_lib.last_count ~= #biome_lib.block_log then
-			biome_lib.dbg(string.format("Pending block counts - ready to process: %-8icurrently deferred: %i",
-				#biome_lib.block_log, #biome_lib.block_recheck_list), 3)
-			biome_lib.last_count = #biome_lib.block_log
-			biome_lib.queue_idle_flag = false
-		elseif not biome_lib.queue_idle_flag then
-			if #biome_lib.block_recheck_list > 0 then
-				biome_lib.dbg("Mapblock queue only contains blocks that can't yet be processed.",  3)
-				biome_lib.dbg("Idling the queue until new blocks arrive or the next wake-up call occurs.",  3)
-			else
-				biome_lib.dbg("Mapblock queue has run dry.",  3)
-				biome_lib.dbg("Idling the queue until new blocks arrive.",  3)
-			end
-			biome_lib.queue_idle_flag = true
-		end
-		minetest.after(1, biome_lib.show_pending_block_count)
-	end
-
-	biome_lib.show_pending_block_count()
-end

block_queue_checks.lua

@@ -0,0 +1,140 @@
+-- Iterate through the mapblock log,
+-- populating blocks with new stuff in the process.
+
+minetest.register_globalstep(function(dtime)
+	if not biome_lib.block_log[1] then return end -- the block log is empty
+
+	if math.random(100) > biome_lib.queue_ratio then return end
+	for s = 1, biome_lib.entries_per_step do
+		biome_lib.generate_block()
+	end
+end)
+
+-- Periodically wake-up the queue to give old blocks a chance to time-out
+-- if the player isn't currently exploring (i.e. they're just playing in one area)
+
+function biome_lib.wake_up_queue()
+	if #biome_lib.block_recheck_list > 1
+	  and #biome_lib.block_log == 0 then
+		biome_lib.block_log[#biome_lib.block_log + 1] =
+			table.copy(biome_lib.block_recheck_list[#biome_lib.block_recheck_list])
+		biome_lib.block_recheck_list[#biome_lib.block_recheck_list] = nil
+		biome_lib.run_block_recheck_list = true
+		biome_lib.dbg("Woke-up the map queue to give old blocks a chance to time-out.", 3)
+	end
+	minetest.after(biome_lib.block_queue_wakeup_time, biome_lib.wake_up_queue)
+end
+
+biome_lib.wake_up_queue()
+
+-- Play out the entire log all at once on shutdown
+-- to prevent unpopulated map areas
+
+local function format_time(t)
+	if t > 59999999 then
+		return os.date("!%M minutes and %S seconds", math.ceil(t/1000000))
+	else
+		return os.date("!%S seconds", math.ceil(t/1000000))
+	end
+end
+
+function biome_lib.check_remaining_time()
+	if minetest.get_us_time() > (biome_lib.shutdown_last_timestamp + 10000000) then -- report progress every 10s
+		biome_lib.shutdown_last_timestamp = minetest.get_us_time()
+
+		local entries_remaining = #biome_lib.block_log + #biome_lib.block_recheck_list
+
+		local total_purged = biome_lib.starting_count - entries_remaining
+		local elapsed_time = biome_lib.shutdown_last_timestamp - biome_lib.shutdown_start_time
+		biome_lib.dbg(string.format("%i entries, approximately %s remaining.",
+			entries_remaining, format_time(elapsed_time/total_purged * entries_remaining)))
+	end
+end
+
+--Purge the block log at shutdown
+
+minetest.register_on_shutdown(function()
+
+	biome_lib.shutdown_start_time = minetest.get_us_time()
+	biome_lib.shutdown_last_timestamp = minetest.get_us_time()+1
+
+	biome_lib.starting_count = #biome_lib.block_log + #biome_lib.block_recheck_list
+
+	if biome_lib.starting_count == 0 then
+		return
+	end
+
+	biome_lib.dbg("Stand by, purging the mapblock log "..
+		"(there are "..biome_lib.starting_count.." entries) ...", 0)
+
+	while #biome_lib.block_log > 0 do
+		biome_lib.generate_block(true)
+		biome_lib.check_remaining_time()
+	end
+
+	if #biome_lib.block_recheck_list > 0 then
+		biome_lib.block_log = table.copy(biome_lib.block_recheck_list)
+		biome_lib.block_recheck_list = {}
+		while #biome_lib.block_log > 0 do
+			biome_lib.generate_block(true)
+			biome_lib.check_remaining_time()
+		end
+	end
+	biome_lib.dbg("Log purge completed after "..
+		format_time(minetest.get_us_time() - biome_lib.shutdown_start_time)..".", 0)
+end)
+
+-- "Record" the map chunks being generated by the core mapgen,
+-- split into individual mapblocks to reduce lag
+
+minetest.register_on_generated(function(minp, maxp, blockseed)
+	local timestamp = minetest.get_us_time()
+	for y = 0, 4 do
+		local miny = minp.y + y*16
+
+		if miny >= biome_lib.mapgen_elevation_limit.min
+		  and (miny + 15) <= biome_lib.mapgen_elevation_limit.max then
+
+			for x = 0, 4 do
+				local minx = minp.x + x*16
+
+				for z = 0, 4 do
+					local minz = minp.z + z*16
+
+					local bmin = {x=minx, y=miny, z=minz}
+					local bmax = {x=minx + 15, y=miny + 15, z=minz + 15}
+					biome_lib.block_log[#biome_lib.block_log + 1] = { bmin, bmax, true, timestamp }
+					biome_lib.block_log[#biome_lib.block_log + 1] = { bmin, bmax, false, timestamp }
+				end
+			end
+		else
+			biome_lib.dbg("Did not enqueue mapblocks at elevation "..miny.."m, they're out of range of any generate_plant() calls.", 4)
+		end
+	end
+	biome_lib.run_block_recheck_list = true
+end)
+
+if biome_lib.debug_log_level >= 3 then
+	biome_lib.last_count = 0
+
+	function biome_lib.show_pending_block_count()
+		if biome_lib.last_count ~= #biome_lib.block_log then
+			biome_lib.dbg(string.format("Pending block counts - ready to process: %-8icurrently deferred: %i",
+				#biome_lib.block_log, #biome_lib.block_recheck_list), 3)
+			biome_lib.last_count = #biome_lib.block_log
+			biome_lib.queue_idle_flag = false
+		elseif not biome_lib.queue_idle_flag then
+			if #biome_lib.block_recheck_list > 0 then
+				biome_lib.dbg("Mapblock queue only contains blocks that can't yet be processed.",  3)
+				biome_lib.dbg("Idling the queue until new blocks arrive or the next wake-up call occurs.",  3)
+			else
+				biome_lib.dbg("Mapblock queue has run dry.",  3)
+				biome_lib.dbg("Idling the queue until new blocks arrive.",  3)
+			end
+			biome_lib.queue_idle_flag = true
+		end
+		minetest.after(1, biome_lib.show_pending_block_count)
+	end
+
+	biome_lib.show_pending_block_count()
+end

compat.lua

@@ -49,3 +49,67 @@ function biome_lib:grow_tree(p, n)
 	biome_lib.dbg("Item: "..dump(n), 2)
 	biome_lib.grow_ltree(p, n)
 end
+
+function biome_lib.can_use_decorations(b, nodes_or_function_or_treedef)
+	if not b or not nodes_or_function_or_treedef
+	  or b.below_nodes
+	  or b.avoid_nodes
+	  or b.avoid_radius
+	  or b.neighbors
+	  or b.ncount
+	  or b.depth
+	  or b.near_nodes_size
+	  or b.near_nodes_vertical
+	  or b.temp_min
+	  or b.temp_max
+	  or b.verticals_list
+	  or b.delete_above
+	  or b.delete_above_surround
+	  or ( type(nodes_or_function_or_treedef) == "string" and not minetest.registered_nodes[nodes_or_function_or_treedef] )
+	  or ( type(nodes_or_function_or_treedef) == "table" and nodes_or_function_or_treedef.axiom )
+	  or type(nodes_or_function_or_treedef) == "function"
+		then return false
+	end
+
+	local biome = biome_lib.set_defaults(b)
+
+	local decor_def = {
+		["deco_type"] = "simple",
+		["flags"] = "all_floors",
+		["decoration"] = nodes_or_function_or_treedef,
+		["place_on"] = biome.surface,
+		["y_min"] = biome.min_elevation,
+		["y_max"] = biome.max_elevation,
+		["spawn_by"] = biome.near_nodes,
+		["num_spawn_by"] = biome.near_nodes and biome.near_nodes_count, 
+	}
+
+	local r = (100-biome.rarity)/100
+	local mc = math.min(biome.max_count, 6400)/6400
+
+	decor_def.noise_params = {
+		octaves = biome_lib.fertile_perlin_octaves,
+		persist = biome_lib.fertile_perlin_persistence * (100/biome_lib.fertile_perlin_scale),
+		scale = math.min(r, mc),
+		seed = biome.seed_diff,
+		offset = 0,
+		spread = {x = 100, y = 100, z = 100},
+		lacunarity = 2,
+		flags = "absvalue"
+	}
+
+	if not b.check_air then
+		decor_def.flags = decor_def.flags..",force_placement"
+	end
+
+	if b.spawn_replace_node then
+		decor_def.place_offset_y = -1
+	end
+
+	if b.random_facedir then
+		decor_def.param2 =     math.min(b.random_facedir[1], b.random_facedir[2])
+		decor_def.param2_max = math.max(b.random_facedir[1], b.random_facedir[2])
+	end
+
+	return decor_def
+end

init.lua

@@ -77,13 +77,25 @@ dofile(biome_lib.modpath .. "/search_functions.lua")
 dofile(biome_lib.modpath .. "/growth.lua")
 dofile(biome_lib.modpath .. "/compat.lua")
 
--- and report the final registration results:
+minetest.after(0.01, function()
+	-- report the final registration results and enable the active block queue stuff
 
-minetest.after(0, function()
+	local n = #biome_lib.actionslist_aircheck + #biome_lib.actionslist_no_aircheck
-	biome_lib.dbg("Registered a total of "..(#biome_lib.surfaceslist_aircheck)+(#biome_lib.surfaceslist_no_aircheck).." surface types to be evaluated, spread", 0)
-	biome_lib.dbg("across "..#biome_lib.actionslist_aircheck.." actions with air-checking and "..#biome_lib.actionslist_no_aircheck.." actions without.", 0)
-	biome_lib.dbg("within an elevation range of "..biome_lib.mapgen_elevation_limit.min.." and "..biome_lib.mapgen_elevation_limit.max.." meters.", 0)
 
+	biome_lib.dbg("All mapgen registrations completed.", 0)
+
+	if n > 0 then
+		biome_lib.dbg("Total items/actions to handle manually: "..n.." ("..#biome_lib.actionslist_no_aircheck.." without air checks)", 0)
+		biome_lib.dbg("Total surface types to handle manually: "..#biome_lib.surfaceslist_aircheck + #biome_lib.surfaceslist_no_aircheck, 0)
+	else
+		biome_lib.dbg("There are no \"handle manually\" items/actions registered,", 0)
+		biome_lib.dbg("so the mapblock queue will not be not used this session.", 0)
+	end
+
+	biome_lib.dbg("Items sent to the engine's decorations handler: "..#biome_lib.registered_decorations, 0)
+	biome_lib.dbg("Elevation range: "..biome_lib.mapgen_elevation_limit.min.." to "..string.format("%+d", biome_lib.mapgen_elevation_limit.max).." meters.", 0)
+
+	if n > 0 then
+		dofile(biome_lib.modpath .. "/block_queue_checks.lua")
+	end
 end)
-
-biome_lib.dbg("[Biome Lib] Loaded", 0)

search_functions.lua

@@ -51,33 +51,3 @@ function biome_lib.find_open_side(pos)
 	end
 	return nil
 end
-
--- "Record" the map chunks being generated by the core mapgen,
--- split into individual mapblocks to reduce lag
-
-minetest.register_on_generated(function(minp, maxp, blockseed)
-	local timestamp = minetest.get_us_time()
-	for y = 0, 4 do
-		local miny = minp.y + y*16
-
-		if miny >= biome_lib.mapgen_elevation_limit.min
-		  and (miny + 15) <= biome_lib.mapgen_elevation_limit.max then
-
-			for x = 0, 4 do
-				local minx = minp.x + x*16
-
-				for z = 0, 4 do
-					local minz = minp.z + z*16
-
-					local bmin = {x=minx, y=miny, z=minz}
-					local bmax = {x=minx + 15, y=miny + 15, z=minz + 15}
-					biome_lib.block_log[#biome_lib.block_log + 1] = { bmin, bmax, true, timestamp }
-					biome_lib.block_log[#biome_lib.block_log + 1] = { bmin, bmax, false, timestamp }
-				end
-			end
-		else
-			biome_lib.dbg("Did not enqueue mapblocks at elevation "..miny.."m, they're out of range of any generate_plant() calls.", 4)
-		end
-	end
-	biome_lib.run_block_recheck_list = true
-end)