added 'on_map_load' setting to mobs:spawn function to spawn mob in newly loaded areas of map only

api.lua

@@ -9,7 +9,7 @@ local use_cmi = minetest.global_exists("cmi")
 
 mobs = {
 	mod = "redo",
-	version = "20200825",
+	version = "20200904",
 	intllib = S,
 	invis = minetest.global_exists("invisibility") and invisibility or {}
 }
@@ -3699,8 +3699,8 @@ function mobs:spawn_abm_check(pos, node, name)
 end
 
 
-function mobs:spawn_specific(name, nodes, neighbors, min_light, max_light,
-		interval, chance, aoc, min_height, max_height, day_toggle, on_spawn)
+function mobs:spawn_specific(name, nodes, neighbors, min_light, max_light, interval,
+		chance, aoc, min_height, max_height, day_toggle, on_spawn, map_load)
 
 	-- Do mobs spawn at all?
 	if not mobs_spawn or not mobs.spawning_mobs[name] then
@@ -3730,18 +3730,20 @@ function mobs:spawn_specific(name, nodes, neighbors, min_light, max_light,
 
 	mobs.spawning_mobs[name].aoc = aoc
 
-	minetest.register_abm({
-
-		label = name .. " spawning",
-		nodenames = nodes,
-		neighbors = neighbors,
-		interval = interval,
-		chance = max(1, (chance * mob_chance_multiplier)),
-		catch_up = false,
-
-		action = function(pos, node, active_object_count,
+	local spawn_action = function(pos, node, active_object_count,
 			active_object_count_wider)
 
+		-- use instead of abm's chance setting when using lbm
+		if map_load and random(max(1, (chance * mob_chance_multiplier))) > 1 then
+			return
+		end
+
+		-- use instead of abm's neighbor setting when using lbm
+		if map_load and not minetest.find_node_near(pos, 1, neighbors) then
+--print("--- lbm neighbors not found")
+			return
+		end
+
 		-- is mob actually registered?
 		if not mobs.spawning_mobs[name]
 		or not minetest.registered_entities[name] then
@@ -3761,7 +3763,8 @@ function mobs:spawn_specific(name, nodes, neighbors, min_light, max_light,
 		end
 
 		-- do not spawn if too many entities in area
-			if active_object_count_wider >= max_per_block then
+		if active_object_count_wider
+		and active_object_count_wider >= max_per_block then
 --print("--- too many entities in area", active_object_count_wider)
 			return
 		end
@@ -3826,8 +3829,7 @@ function mobs:spawn_specific(name, nodes, neighbors, min_light, max_light,
 		end
 
 		-- only spawn a set distance away from player
-			local objs = minetest.get_objects_inside_radius(
-					pos, mob_nospawn_range)
+		local objs = minetest.get_objects_inside_radius(pos, mob_nospawn_range)
 
 		for n = 1, #objs do
 
@@ -3839,8 +3841,7 @@ function mobs:spawn_specific(name, nodes, neighbors, min_light, max_light,
 
 		-- do we have enough space to spawn mob? (thanks wuzzy)
 		local ent = minetest.registered_entities[name]
-			local width_x = max(1,
-					ceil(ent.collisionbox[4] - ent.collisionbox[1]))
+		local width_x = max(1, ceil(ent.collisionbox[4] - ent.collisionbox[1]))
 		local min_x, max_x
 
 		if width_x % 2 == 0 then
@@ -3851,8 +3852,7 @@ function mobs:spawn_specific(name, nodes, neighbors, min_light, max_light,
 			min_x = -max_x
 		end
 
-			local width_z = max(1,
-					ceil(ent.collisionbox[6] - ent.collisionbox[3]))
+		local width_z = max(1, ceil(ent.collisionbox[6] - ent.collisionbox[3]))
 		local min_z, max_z
 
 		if width_z % 2 == 0 then
@@ -3863,8 +3863,7 @@ function mobs:spawn_specific(name, nodes, neighbors, min_light, max_light,
 			min_z = -max_z
 		end
 
-			local max_y = max(0,
-					ceil(ent.collisionbox[5] - ent.collisionbox[2]) - 1)
+		local max_y = max(0, ceil(ent.collisionbox[5] - ent.collisionbox[2]) - 1)
 
 		for y = 0, max_y do
 		for x = min_x, max_x do
@@ -3875,8 +3874,7 @@ function mobs:spawn_specific(name, nodes, neighbors, min_light, max_light,
 				y = pos.y + y,
 				z = pos.z + z}
 
-				if minetest.registered_nodes[
-						node_ok(pos2).name].walkable == true then
+			if minetest.registered_nodes[node_ok(pos2).name].walkable == true then
 --print("--- not enough space to spawn", name)
 				return
 			end
@@ -3898,18 +3896,45 @@ function mobs:spawn_specific(name, nodes, neighbors, min_light, max_light,
 
 		local mob = minetest.add_entity(pos, name)
 
---			print("[mobs] Spawned " .. name .. " at "
---			.. minetest.pos_to_string(pos) .. " on "
---			.. node.name .. " near " .. neighbors[1])
+		print("[mobs] Spawned " .. name .. " at "
+		.. minetest.pos_to_string(pos) .. " on "
+		.. node.name .. " near " .. neighbors[1])
 
 		if on_spawn then
-
-				local ent = mob:get_luaentity()
-
-				on_spawn(ent, pos)
+			on_spawn(mob:get_luaentity(), pos)
 		end
 	end
+
+
+	-- are we registering an abm or lbm?
+	if map_load == true then
+
+		minetest.register_lbm({
+			name = name .. "_spawning",
+			label = name .. " spawning",
+			nodenames = nodes,
+			run_at_every_load = false,
+
+			action = function(pos, node)
+				spawn_action(pos, node)
+			end
 		})
+
+	else
+
+		minetest.register_abm({
+			label = name .. " spawning",
+			nodenames = nodes,
+			neighbors = neighbors,
+			interval = interval,
+			chance = max(1, (chance * mob_chance_multiplier)),
+			catch_up = false,
+
+			action = function(pos, node, active_object_count, active_object_count_wider)
+				spawn_action(pos, node, active_object_count, active_object_count_wider)
+			end
+		})
+	end
 end
 
 
@@ -3922,7 +3947,7 @@ function mobs:register_spawn(name, nodes, max_light, min_light, chance,
 end
 
 
--- MarkBu's spawn function
+-- MarkBu's spawn function (USE this one please)
 function mobs:spawn(def)
 
 	mobs:spawn_specific(
@@ -3937,7 +3962,8 @@ function mobs:spawn(def)
 		def.min_height or -31000,
 		def.max_height or 31000,
 		def.day_toggle,
-		def.on_spawn)
+		def.on_spawn,
+		def.on_map_load)
 end
 
 

api.txt

@@ -383,6 +383,9 @@ default setting and can be omitted:
                           anytime
     'on_spawn'            is a custom function which runs after mob has spawned
                           and gives self and pos values.
+    'on_map_load'         when true mobs will have a chance of spawning only
+                          when new areas of map are loaded, interval will not be
+                          used.
 
 The older spawn functions are still active and working but have no defaults like
 the mobs:spawn, so it is recommended to use the above instead.

readme.MD

@@ -23,7 +23,8 @@ Lucky Blocks: 9
 
 
 Changelog:
-- 1.52 - Added 'mob_active_limit' in settings to set number of mobs in game
+- 1.53 - Added 'on_map_load' settings to mobs:spawn so that mobs will only spawn when new areas of map are loaded.
+- 1.52 - Added 'mob_active_limit' in settings to set number of mobs in game,
 (default is 0 for unlimited), removed {immortal} from mob armor, fluid viscocity slows mobs
 - 1.51 - Added some node checks for dangerous nodes, jumping and falling tweaks, spawn area check (thx for idea wuzzy), re-enabled mob suffocation, add 'mob_nospawn_range' setting
 - 1.50 - Added new line_of_sight function that uses raycasting if mt5.0 is found,  (thanks Astrobe), dont spawn mobs if world anchor nearby (technic or simple_anchor mods), chinese local added