Add in mob following for cows

mods/ENTITIES/mcl_mobs/api/api.lua

@@ -265,8 +265,6 @@ function mobs:register_mob(name, def)
 		env_damage_timer = 0,
 		tamed = false,
 		pause_timer = 0,
-		horny = false,
-		hornytimer = 0,
 		gotten = false,
 		health = 0,
 		reach = def.reach or 3,
@@ -298,7 +296,6 @@ function mobs:register_mob(name, def)
 		owner_loyal = def.owner_loyal,
 		facing_fence = false,
 
-
 		_cmi_is_mob = true,
 
 		pushable = def.pushable or true,
@@ -331,6 +328,12 @@ function mobs:register_mob(name, def)
 		skittish = def.skittish,
 		lifetimer_reset = 30, --30 seconds
 		lifetimer = 30, --30 seconds
+
+		breedable = def.breedable,
+		breed_timer = 0,
+		breed_cooloff_timer = 5*60, -- 5 minutes
+		bred = false,
+		follow_distance = def.follow_distance or 2,
 		--end j4i stuff
 
 		-- MCL2 extensions

mods/ENTITIES/mcl_mobs/api/mob_functions/ai.lua

@@ -6,6 +6,7 @@ local math_round  = math.round
 local vector_multiply = vector.multiply
 local vector_add      = vector.add
 local vector_new      = vector.new
+local vector_distance = vector.distance
 
 local minetest_yaw_to_dir                   = minetest.yaw_to_dir
 local minetest_get_item_group               = minetest.get_item_group
@@ -67,7 +68,8 @@ local land_state_list_wandering = {"stand", "walk"}
 
 local land_state_switch = function(self, dtime)
 
-	--do math after sure not attacking or running away
+	--do math before sure not attacking, following, or running away so continue
+	--doing random walking for mobs if all states are not met
 	self.state_timer = self.state_timer - dtime
 
 	--only run away
@@ -76,18 +78,27 @@ local land_state_switch = function(self, dtime)
 		if self.run_timer > 0 then
 			return
 		end
-
 		--continue
 	end
 
+	--ignore everything else if following
+	if mobs.check_following(self) then
+		self.state = "follow"
+		return
+	--reset the state timer to get the mob out of
+	--the follow state - not the cleanest option
+	--but the easiest
+	elseif self.state == "follow" then
+		self.state_timer = 0
+	end
+
 	--only attack
 	if self.hostile and self.attacking then
 		self.state = "attack"
 		return
 	end
 
-	
+	--if finally reached here then do random wander
-
 	if self.state_timer <= 0 then
 		self.state_timer = math.random(4,10) + math.random()
 		self.state = land_state_list_wandering[math.random(1,#land_state_list_wandering)]
@@ -103,6 +114,16 @@ local land_state_execution = function(self,dtime)
 		return
 	end
 
+	--cool off after breeding
+	if self.breed_timer and self.breed_timer > 0 then
+		self.breed_timer = self.breed_timer - dtime
+		--do this to skip the first check, using as switch
+		if self.breed_timer <= 0 then
+			self.breed_timer = nil
+		end
+	end
+
+
 	local pos = self.object:get_pos()
 	local collisionbox = self.object:get_properties().collisionbox
 	--get the center of the mob
@@ -145,6 +166,24 @@ local land_state_execution = function(self,dtime)
 
 		mobs.lock_yaw(self)
 
+	elseif self.state == "follow" then		
+
+		mobs.set_yaw_while_following(self)
+
+		local distance_from_follow_person = vector_distance(self.object:get_pos(), self.following_person:get_pos())
+				
+		if self.follow_distance < distance_from_follow_person then
+			mobs.set_mob_animation(self, "run")
+			mobs.set_velocity(self,self.run_velocity)
+
+			if mobs.jump_check(self) == 1 then
+				mobs.jump(self)
+			end
+		else
+			mobs.set_mob_animation(self, "stand")
+			mobs.set_velocity(self,0)
+		end
+
 	elseif self.state == "walk" then
 
 		self.walk_timer = self.walk_timer - dtime
@@ -697,7 +736,7 @@ mobs.mob_step = function(self, dtime)
 	end
 
 	--despawn mechanism
-	--don't despawned tamed mobs
+	--don't despawned tamed or bred mobs
 	if not self.tamed and not self.bred then
 		self.lifetimer = self.lifetimer - dtime
 		if self.lifetimer <= 0 then

mods/ENTITIES/mcl_mobs/api/mob_functions/animation.lua

@@ -214,3 +214,25 @@ mobs.handle_explosion_animation = function(self)
 
 	self.object:set_properties({visual_size = visual_size_modified})
 end
+
+
+--this is used when a mob is following player
+mobs.set_yaw_while_following = function(self)
+
+	if self.object:get_properties().automatic_face_movement_dir then
+		self.object:set_properties{automatic_face_movement_dir = false}
+	end
+
+	--turn positions into pseudo 2d vectors
+	local pos1 = self.object:get_pos()
+	pos1.y = 0
+
+	local pos2 = self.following_person:get_pos()
+	pos2.y = 0
+
+	local new_direction = vector_direction(pos1,pos2)
+	local new_yaw = minetest_dir_to_yaw(new_direction)
+
+	self.object:set_yaw(new_yaw)
+	self.yaw = new_yaw
+end

mods/ENTITIES/mcl_mobs/api/mob_functions/breeding.lua

@@ -0,0 +1,33 @@
+--check to see if someone nearby has some tasty food
+mobs.check_following = function(self) -- returns true or false
+
+    --ignore
+    if not self.follow then
+        self.following_person = nil
+        return(false)
+    end
+
+    --hey look, this thing works for passive mobs too!
+    local follower = mobs.detect_closest_player_within_radius(self,true,self.view_range,self.eye_height)
+
+    --check if the follower is a player incase they log out
+    if follower and follower:is_player() then
+        local stack = follower:get_wielded_item()
+        --safety check
+        if not stack then
+            self.following_person = nil
+            return(false)
+        end
+        local item_name = stack:get_name()
+
+        --all checks have passed, that guy has some good looking food
+        if item_name == self.follow then
+            self.following_person = follower
+            return(true)
+        end
+    end
+
+    --everything failed
+    self.following_person = nil
+    return(false)
+end

mods/ENTITIES/mcl_mobs/api/mob_functions/set_up.lua

@@ -6,7 +6,7 @@ local minetest_settings                     = minetest.settings
 mobs.mob_staticdata = function(self)
 
 	--despawn mechanism
-	--don't despawned tamed mobs
+	--don't despawned tamed or bred mobs
 	if not self.tamed and not self.bred then
 		if not mobs.check_for_player_within_area(self, 64) then
 			--print("removing SERIALIZED!")

mods/ENTITIES/mobs_mc/cow+mooshroom.lua

@@ -50,13 +50,13 @@ local cow_def = {
 	},
 	follow = mobs_mc.follow.cow,
 	on_rightclick = function(self, clicker)
-		if mobs:feed_tame(self, clicker, 1, true, true) then
+		--if mobs:feed_tame(self, clicker, 1, true, true) then
-			return
+			--return
-		end
+		--end
 
-		if self.child then
+		--if self.child then
-			return
+		--	return
-		end
+		--end
 
 		local item = clicker:get_wielded_item()
 		if item:get_name() == mobs_mc.items.bucket and clicker:get_inventory() then
@@ -74,6 +74,8 @@ local cow_def = {
 			return
 		end
 	end,
+	breedable = true,
+	follow_distance = 2,
 	follow = mobs_mc.items.wheat,
 	view_range = 10,
 	fear_height = 4,