From 7d803e174c0ec16f064ea228c1eb1314a65b3623 Mon Sep 17 00:00:00 2001
From: ancientmarinerdev <ancientmariner_dev@proton.me>
Date: Thu, 26 Jan 2023 21:35:41 +0000
Subject: [PATCH] Set freeze and warning when mobs too close to boundary of
 world

---
 mods/CORE/mcl_util/init.lua    |  6 ++++++
 mods/ENTITIES/mcl_mobs/api.lua | 28 ++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/mods/CORE/mcl_util/init.lua b/mods/CORE/mcl_util/init.lua
index f37b34444..d55ec0430 100644
--- a/mods/CORE/mcl_util/init.lua
+++ b/mods/CORE/mcl_util/init.lua
@@ -1,5 +1,11 @@
 mcl_util = {}
 
+local MAPGEN_LIMIT = 32000
+
+function mcl_util.get_mapgen_limit()
+	return MAPGEN_LIMIT
+end
+
 -- Updates all values in t using values from to*.
 function table.update(t, ...)
 	for _, to in ipairs {...} do
diff --git a/mods/ENTITIES/mcl_mobs/api.lua b/mods/ENTITIES/mcl_mobs/api.lua
index f5e50ba2a..1a7982ece 100644
--- a/mods/ENTITIES/mcl_mobs/api.lua
+++ b/mods/ENTITIES/mcl_mobs/api.lua
@@ -24,6 +24,10 @@ local spawn_protected = minetest.settings:get_bool("mobs_spawn_protected") ~= fa
 local mobs_debug = minetest.settings:get_bool("mobs_debug", false) -- Shows helpful debug info above each mob
 local spawn_logging = minetest.settings:get_bool("mcl_logging_mobs_spawn",true)
 
+local MAPGEN_LIMIT = mcl_util.get_mapgen_limit()
+local MAPGEN_MOB_LIMIT = mcl_util.get_mapgen_limit() - 50
+
+
 -- Peaceful mode message so players will know there are no monsters
 if minetest.settings:get_bool("only_peaceful_mobs", false) then
 	minetest.register_on_joinplayer(function(player)
@@ -328,6 +332,26 @@ local function update_timers (self, dtime)
 	end
 end
 
+function mob_class:outside_limits()
+	local pos = self.object:get_pos()
+	if pos then
+		local posx = math.abs(pos.x)
+		local posy = math.abs(pos.y)
+		local posz = math.abs(pos.z)
+		if posx > MAPGEN_MOB_LIMIT or posy > MAPGEN_MOB_LIMIT or posz > MAPGEN_MOB_LIMIT then
+			if posx > MAPGEN_LIMIT or posy > MAPGEN_LIMIT or posz > MAPGEN_LIMIT then
+				minetest.log("action", "Warning mob past limits of worldgen: " .. minetest.pos_to_string(pos))
+			else
+				minetest.log("action", "Warning mob close to limits of worldgen: " .. minetest.pos_to_string(pos))
+				self:set_velocity(0)
+				self.state = "stand"
+				self:set_animation( "stand")
+			end
+			return true
+		end
+	end
+end
+
 -- main mob function
 function mob_class:on_step(dtime)
 	local pos = self.object:get_pos()
@@ -335,6 +359,10 @@ function mob_class:on_step(dtime)
 
 	if self:check_despawn(pos, dtime) then return true end
 
+	if self:outside_limits() then
+		return
+	end
+
 	if self:check_death_and_slow_mob() then
 		--minetest.log("action", "Mob is dying: ".. tostring(self.name))
 		-- Do we abandon out of here now?