Massively overhaul spawning algorithm for mobs

mods/ENTITIES/mcl_mobs/api.lua

@@ -4028,6 +4028,13 @@ what is aoc???
 WARNING: BIOME INTEGRATION NEEDED -> How to get biome through lua??
 ]]--
 
+--this is where all of the spawning information is kept
+local spawn_dictionary = {
+	["overworld"] = {},
+	["nether"] = {},
+	["end"] = {}
+}
+
 function mobs:spawn_specific(
 	name,
 	dimension,
@@ -4043,10 +4050,6 @@ function mobs:spawn_specific(
 	on_spawn)
 
 	
-	
-
-	print(name, dump(nodes))
-
 	-- Do mobs spawn at all?
 	if not mobs_spawn then
 		return
@@ -4067,7 +4070,6 @@ function mobs:spawn_specific(
 
 		minetest.log("action",
 			string.format("[mobs] Chance setting for %s changed to %s (total: %s)", name, chance, aoc))
-
 	end
 
 	local spawn_action
@@ -4232,6 +4234,24 @@ function mobs:spawn_specific(
 		spawn_action(pos, node, active_object_count, active_object_count_wider, name)
 	end
 
+
+	--load information into the spawn dictionary
+	local key = #spawn_dictionary[dimension] + 1
+
+	spawn_dictionary[dimension][key] = {}
+	spawn_dictionary[dimension][key]["name"]       = name
+	spawn_dictionary[dimension][key]["type"]       = type_of_spawning
+	spawn_dictionary[dimension][key]["min_light"]  = min_light
+	spawn_dictionary[dimension][key]["max_light"]  = max_light
+	spawn_dictionary[dimension][key]["interval"]   = interval
+	spawn_dictionary[dimension][key]["chance"]     = chance
+	spawn_dictionary[dimension][key]["aoc"]        = aoc
+	spawn_dictionary[dimension][key]["min_height"] = min_height
+	spawn_dictionary[dimension][key]["max_height"] = max_height
+	spawn_dictionary[dimension][key]["day_toggle"] = day_toggle
+	spawn_dictionary[dimension][key]["on_spawn"]   = spawn_abm_action
+	
+	--[[
 	minetest.register_abm({
 		label = name .. " spawning",
 		nodenames = nodes,
@@ -4241,18 +4261,24 @@ function mobs:spawn_specific(
 		catch_up = false,
 		action = spawn_abm_action,
 	})
+	]]--
 end
 
 
 -- compatibility with older mob registration
+-- we're going to forget about this for now -j4i
+--[[
 function mobs:register_spawn(name, nodes, max_light, min_light, chance, active_object_count, max_height, day_toggle)
 
 	mobs:spawn_specific(name, nodes, {"air"}, min_light, max_light, 30,
 		chance, active_object_count, -31000, max_height, day_toggle)
 end
+]]--
 
 
+--I'm not sure what this does but disabling it doesn't cause a crash -j4i
 -- MarkBu's spawn function
+--[[
 function mobs:spawn(def)
 
 	local name = def.name
@@ -4271,9 +4297,127 @@ function mobs:spawn(def)
 	mobs:spawn_specific(name, nodes, neighbors, min_light, max_light, interval,
 		chance, active_object_count, min_height, max_height, day_toggle, on_spawn)
 end
+]]--
 
 
+local axis
+--inner and outer part of square donut radius
+local inner = 1
+local outer = 70
+local int = {-1,1}
+local position_calculation = function(pos)
 
+	pos = vector.floor(pos)
+
+	--this is used to determine the axis buffer from the player
+	axis = math.random(0,1)
+
+	--cast towards the direction
+	if axis == 0 then --x
+		pos.x = pos.x + math.random(inner,outer)*int[math.random(1,2)]
+		pos.z = pos.z + math.random(-outer,outer)
+	else --z
+		pos.z = pos.z + math.random(inner,outer)*int[math.random(1,2)]
+		pos.x = pos.x + math.random(-outer,outer)
+	end
+	return(pos)
+end
+
+--[[
+local decypher_limits_dictionary = {
+	["overworld"] = {mcl_vars.mg_overworld_min,mcl_vars.mg_overworld_max},
+	["nether"]    = {mcl_vars.mg_nether_min,   mcl_vars.mg_nether_max},
+	["end"]       = {mcl_vars.mg_end_min,      mcl_vars.mg_end_max}
+}
+]]--
+
+local function decypher_limits(posy)
+	--local min_max_table = decypher_limits_dictionary[dimension]
+	--return min_max_table[1],min_max_table[2]
+	posy = math.floor(posy)
+	return posy - 32, posy + 32
+end
+
+
+--todo mob limiting
+--MAIN LOOP
+local timer = 0
+minetest.register_globalstep(function(dtime)
+	timer = timer + dtime
+	if timer >= 15 then
+		timer = 0
+		for _,player in ipairs(minetest.get_connected_players()) do
+			for i = 1,math.random(5) do
+				local player_pos = player:get_pos()
+				local _,dimension = mcl_worlds.y_to_layer(player_pos.y)
+				local min,max = decypher_limits(player_pos.y)
+
+				local goal_pos = position_calculation(player_pos)
+				
+
+				local mob_def = spawn_dictionary[dimension][math.random(1,#spawn_dictionary[dimension])]
+
+				if not mob_def then --to catch a crazy error if it ever happens
+					minetest.log("error", "WARNING!! mob spawning attempted to index a NIL mob!")
+					goto continue
+				end
+
+				if mob_def.type == "ground" then
+
+					local spawning_position_list = minetest.find_nodes_in_area_under_air(vector.new(goal_pos.x,min,goal_pos.z), vector.new(goal_pos.x,max,goal_pos.z), {"group:solid"})
+
+					if #spawning_position_list <= 0 then
+						goto continue
+					end
+					
+					local spawning_position = spawning_position_list[math.random(1,#spawning_position_list)]
+
+					spawning_position.y = spawning_position.y + 1
+
+					local gotten_light = minetest.get_node_light(spawning_position)
+
+					if gotten_light and gotten_light >= mob_def.min_light and gotten_light <= mob_def.max_light then
+						minetest.add_entity(spawning_position, mob_def.name)
+					end
+				elseif mob_def.type == "air" then
+					local spawning_position_list = minetest.find_nodes_in_area(vector.new(goal_pos.x,min,goal_pos.z), vector.new(goal_pos.x,max,goal_pos.z), {"air"})
+
+					if #spawning_position_list <= 0 then
+						goto continue
+					end
+					
+					local spawning_position = spawning_position_list[math.random(1,#spawning_position_list)]
+
+					local gotten_light = minetest.get_node_light(spawning_position)
+
+					if gotten_light and gotten_light >= mob_def.min_light and gotten_light <= mob_def.max_light then
+						minetest.add_entity(spawning_position, mob_def.name)
+					end
+				elseif mob_def.type == "water" then
+					local spawning_position_list = minetest.find_nodes_in_area(vector.new(goal_pos.x,min,goal_pos.z), vector.new(goal_pos.x,max,goal_pos.z), {"group:water"})
+
+					if #spawning_position_list <= 0 then
+						goto continue
+					end
+					
+					local spawning_position = spawning_position_list[math.random(1,#spawning_position_list)]
+
+					local gotten_light = minetest.get_node_light(spawning_position)
+
+					if gotten_light and gotten_light >= mob_def.min_light and gotten_light <= mob_def.max_light then
+						minetest.add_entity(spawning_position, mob_def.name)
+					end
+				--elseif mob_def.type == "lava" then
+					--implement later
+				end
+				--local spawn minetest.find_nodes_in_area_under_air(vector.new(pos.x,pos.y-find_node_height,pos.z), vector.new(pos.x,pos.y+find_node_height,pos.z), {"group:solid"})
+
+
+				::continue:: --this is a safety catch
+			end
+		end
+	end
+end)