From b401b50c045830386c1c06c22be2232bda3e5b61 Mon Sep 17 00:00:00 2001
From: jordan4ibanez <jordan4ibanez@users.noreply.github.com>
Date: Sat, 24 Apr 2021 21:15:42 -0400
Subject: [PATCH] Give mobs 6 seconds of memory to prevent strange behavior
 when player hides behind something

---
 mods/ENTITIES/mcl_mobs/api/api.lua            |  2 ++
 .../mcl_mobs/api/mob_functions/ai.lua         | 32 +++++++++++++++----
 2 files changed, 27 insertions(+), 7 deletions(-)

diff --git a/mods/ENTITIES/mcl_mobs/api/api.lua b/mods/ENTITIES/mcl_mobs/api/api.lua
index 81c88a064..3a1fa8bff 100644
--- a/mods/ENTITIES/mcl_mobs/api/api.lua
+++ b/mods/ENTITIES/mcl_mobs/api/api.lua
@@ -328,6 +328,8 @@ function mobs:register_mob(name, def)
 
 		minimum_follow_distance = def.minimum_follow_distance or 0.5, --make mobs not freak out when underneath
 
+		memory = 0, -- memory timer if chasing/following
+
 		--for spiders
 		always_climb = def.always_climb,
 
diff --git a/mods/ENTITIES/mcl_mobs/api/mob_functions/ai.lua b/mods/ENTITIES/mcl_mobs/api/mob_functions/ai.lua
index ee7ca0ecc..d8993ee50 100644
--- a/mods/ENTITIES/mcl_mobs/api/mob_functions/ai.lua
+++ b/mods/ENTITIES/mcl_mobs/api/mob_functions/ai.lua
@@ -899,23 +899,41 @@ mobs.mob_step = function(self, dtime)
 		--go get the closest player
 		if attacking then
 
+			self.memory = 6 --6 seconds of memory
+
 			--set initial punch timer
 			if self.attacking == nil then
 				if self.attack_type == "punch" then
 					self.punch_timer = -1
 				end
 			end
-
 			self.attacking = attacking
-		--no player in area
-		else
 
-			--reset states when coming out of hostile state
-			if self.attacking ~= nil then
-				self.state_timer = -1
+		--no player in area
+		elseif self.memory > 0 then
+			--try to remember
+			self.memory = self.memory - dtime
+			--get if memory player is within viewing range
+			if self.attacking and self.attacking:is_player() then
+				local distance = vector_distance(self.object:get_pos(), self.attacking:get_pos())
+				if distance > self.view_range then
+					self.memory = 0
+				end
+			--out of viewing range, forget em
+			else
+				self.memory = 0
 			end
 
-			self.attacking = nil
+			if self.memory <= 0 then
+
+				--reset states when coming out of hostile state
+				if self.attacking ~= nil then
+					self.state_timer = -1
+				end
+
+				self.attacking = nil
+				self.memory = 0
+			end
 		end
 	end