Complete mob breeding, make cows breedable

mods/ENTITIES/mcl_mobs/api/api.lua

@@ -245,7 +245,6 @@ function mobs:register_mob(name, def)
 		shoot_interval = def.shoot_interval,
 		sounds = def.sounds or {},
 		animation = def.animation,
-		follow = def.follow,
 		jump = def.jump ~= false,
 		walk_chance = def.walk_chance or 50,
 		attacks_monsters = def.attacks_monsters or false,
@@ -329,11 +328,24 @@ function mobs:register_mob(name, def)
 		lifetimer_reset = 30, --30 seconds
 		lifetimer = 30, --30 seconds
 
+		--breeding stuff
 		breedable = def.breedable,
 		breed_timer = 0,
-		breed_cooloff_timer = 5*60, -- 5 minutes
+		breed_lookout_timer = 0,
+		breed_distance = def.breed_distance or 1.5, --how far away mobs have to be to begin actual breeding
+		breed_lookout_timer_goal = 30, --30 seconds (this timer is for how long the mob looks for a mate)
+		breed_timer_cooloff = 5*60, -- 5 minutes (this timer is for how long the mob has to wait before being bred again)
 		bred = false,
+		follow = def.follow, --this item is also used for the breeding mechanism
 		follow_distance = def.follow_distance or 2,
+		baby_size = def.baby_size or 0.5,
+		baby = false,
+		grow_up_timer = 0,
+		grow_up_goal  = 20*60, --in 20 minutes the mob grows up
+
+		backup_visual_size = def.visual_size,
+		backup_collisionbox = collisionbox,
+		backup_selectionbox = def.selectionbox or def.collisionbox,
 		--end j4i stuff
 
 		-- MCL2 extensions

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

@@ -81,8 +81,20 @@ local land_state_switch = function(self, dtime)
 		--continue
 	end
 
+	--ignore everything else if breeding
+	if self.breed_lookout_timer and self.breed_lookout_timer > 0 then
+		self.state = "breed"
+		return
+	--reset the state timer to get the mob out of
+	--the breed state
+	elseif self.state == "breed" then
+		self.state_timer = 0
+	end
+
 	--ignore everything else if following
-	if mobs.check_following(self) then
+	if mobs.check_following(self) and 
+	(not self.breed_lookout_timer or (self.breed_lookout_timer and self.breed_lookout_timer == 0)) and 
+	(not self.breed_timer or (self.breed_timer and self.breed_timer == 0)) then
 		self.state = "follow"
 		return
 	--reset the state timer to get the mob out of
@@ -109,17 +121,37 @@ end
 -- states are executed here
 local land_state_execution = function(self,dtime)
 
+	--[[ -- this is a debug which shows the timer and makes mobs breed 100 times faster
+	print(self.breed_timer)
+	if self.breed_timer > 0 then
+		self.breed_timer = self.breed_timer - (dtime * 100)
+		if self.breed_timer <= 0 then
+			self.breed_timer = 0
+		end
+	end
+	]]--
+
 	--no collisionbox exception
 	if not self.object:get_properties() then
 		return
 	end
 	
+
+	--timer to time out looking for mate
+	if self.breed_lookout_timer and self.breed_lookout_timer > 0 then
+		self.breed_lookout_timer = self.breed_lookout_timer - dtime
+		--looking for mate failed
+		if self.breed_lookout_timer <= 0 then
+			self.breed_lookout_timer = 0
+		end
+	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
+			self.breed_timer = 0
 		end
 	end
 
@@ -165,7 +197,6 @@ local land_state_execution = function(self,dtime)
 		end
 
 		mobs.lock_yaw(self)
-
 	elseif self.state == "follow" then		
 
 		--always look at players
@@ -288,6 +319,48 @@ local land_state_execution = function(self,dtime)
 			mobs.projectile_attack_walk(self,dtime)
 
 		end
+	elseif self.state == "breed" then
+
+		mobs.breeding_effect(self)
+
+		local mate = mobs.look_for_mate(self)
+
+		--found a mate
+		if mate then
+			mobs.set_yaw_while_breeding(self,mate)
+			mobs.set_velocity(self, self.walk_velocity)
+
+			--smoosh together basically
+			if vector_distance(self.object:get_pos(), mate:get_pos()) <= self.breed_distance then
+				mobs.set_mob_animation(self, "stand")
+				if self.special_breed_timer == 0 then
+					self.special_breed_timer = 2 --breeding takes 2 seconds
+				end
+
+				self.special_breed_timer = self.special_breed_timer - dtime
+				if self.special_breed_timer <= 0 then
+
+					--pop a baby out, it's a miracle!
+					local baby_pos = vector.divide(vector.add(self.object:get_pos(), mate:get_pos()), 2)
+					local baby_mob = minetest.add_entity(pos, self.name, minetest.serialize({baby = true, grow_up_timer = self.grow_up_goal, bred = true}))
+
+					self.special_breed_timer = 0
+					self.breed_lookout_timer = 0
+					self.breed_timer = self.breed_timer_cooloff
+
+					mate:get_luaentity().special_breed_timer = 0
+					mate:get_luaentity().breed_lookout_timer = 0
+					mate:get_luaentity().breed_timer = self.breed_timer_cooloff -- can reuse because it's the same mob
+				end
+			else
+				mobs.set_mob_animation(self, "walk")
+			end
+		--couldn't find a mate, just stand there until the player pushes it towards one
+		--or the timer runs out
+		else
+			mobs.set_mob_animation(self, "stand")
+			mobs.set_velocity(self,0)
+		end
 
 	end	
 	
@@ -777,6 +850,24 @@ mobs.mob_step = function(self, dtime)
 		return
 	end
 
+	--baby grows up
+	if self.baby then
+		--print(self.grow_up_timer)
+		--catch missing timer
+		if not self.grow_up_timer then
+			self.grow_up_timer = self.grow_up_goal
+		end
+
+		self.grow_up_timer = self.grow_up_timer - dtime
+
+		--baby grows up!
+		if self.grow_up_timer <= 0 then
+			self.grow_up_timer = 0
+			mobs.baby_grow_up(self)
+		end
+	end
+	
+
 
 	--do custom mob instructions
 	if self.do_custom then

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

@@ -236,3 +236,24 @@ mobs.set_yaw_while_following = function(self)
 	self.object:set_yaw(new_yaw)
 	self.yaw = new_yaw
 end
+
+--this is used for when mobs breed
+mobs.set_yaw_while_breeding = function(self, mate)
+
+	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 = mate: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

@@ -1,3 +1,7 @@
+local minetest_get_objects_inside_radius = minetest.get_objects_inside_radius
+
+local vector_distance = vector.distance
+
 --check to see if someone nearby has some tasty food
 mobs.check_following = function(self) -- returns true or false
 
@@ -18,8 +22,8 @@ mobs.check_following = function(self) -- returns true or false
             self.following_person = nil
             return(false)
         end
-        local item_name = stack:get_name()
 
+        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
@@ -31,3 +35,143 @@ mobs.check_following = function(self) -- returns true or false
     self.following_person = nil
     return(false)
 end
+
+--a function which attempts to make mobs enter
+--the breeding state
+mobs.enter_breed_state = function(self,clicker)
+
+    --do not breed if baby
+    if self.baby then
+        return(false)
+    end
+
+    --do not do anything if looking for mate or
+    --if cooling off from breeding
+    if self.breed_lookout_timer > 0 or self.breed_timer > 0 then
+        return(false)
+    end
+
+    --if this is caught, that means something has gone
+    --seriously wrong
+    if not clicker or not clicker:is_player() then
+        return(false)
+    end
+
+    local stack = clicker:get_wielded_item()
+    --safety check
+    if not stack then
+        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        
+        if not minetest.is_creative_enabled(clicker:get_player_name()) then
+            stack:take_item()
+            clicker:set_wielded_item(stack)
+        end
+        self.breed_lookout_timer = self.breed_lookout_timer_goal
+        self.bred = true
+        return(true)
+    end
+
+    --everything failed
+    return(false)
+end
+
+
+--find the closest mate in the area
+mobs.look_for_mate = function(self)
+
+	local pos1 = self.object:get_pos()
+    pos1.y = pos1.y + self.eye_height
+
+	local mates_in_area = {}
+	local winner_mate = nil
+	local mates_detected = 0
+    local radius = self.view_range
+
+	--get mates in radius
+	for _,mate in pairs(minetest_get_objects_inside_radius(pos1, radius)) do
+
+        --look for a breeding mate
+		if mate and mate:get_luaentity() 
+        and mate:get_luaentity()._cmi_is_mob 
+        and mate:get_luaentity().name == self.name 
+        and mate:get_luaentity().breed_lookout_timer > 0
+        and mate:get_luaentity() ~= self then
+
+			local pos2 = mate:get_pos()
+
+			local distance = vector_distance(pos1,pos2)
+
+			if distance <= radius then
+				if line_of_sight then
+					--must add eye height or stuff breaks randomly because of
+					--seethrough nodes being a blocker (like grass)
+					if minetest_line_of_sight(
+							vector_new(pos1.x, pos1.y, pos1.z), 
+							vector_new(pos2.x, pos2.y + mate:get_properties().eye_height, pos2.z)
+						) then
+						mates_detected = mates_detected + 1
+						mates_in_area[mate] = distance
+					end
+				else
+					mates_detected = mates_detected + 1
+					mates_in_area[mate] = distance
+				end
+			end
+		end
+	end
+
+
+	--return if there's no one near by
+	if mates_detected <= 0 then --handle negative numbers for some crazy error that could possibly happen
+		return nil
+	end
+
+	--do a default radius max
+	local shortest_distance = radius + 1
+
+	--sort through mates and find the closest mate
+	for mate,distance in pairs(mates_in_area) do
+		if distance < shortest_distance then
+			shortest_distance = distance
+			winner_mate = mate
+		end
+	end
+
+	return(winner_mate)
+
+end
+
+--make the baby grow up
+mobs.baby_grow_up = function(self)
+    self.baby = nil
+    self.visual_size  = self.backup_visual_size
+    self.collisionbox = self.backup_collisionbox
+    self.selectionbox = self.backup_selectionbox
+    self.object:set_properties(self)
+end
+
+--makes the baby grow up faster with diminishing returns
+mobs.make_baby_grow_faster = function(self,clicker)
+    if clicker and clicker:is_player() then
+        local stack = clicker:get_wielded_item()
+        --safety check
+        if not stack then            
+            return
+        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.grow_up_timer = self.grow_up_timer - (self.grow_up_timer * 0.10) --take 10 percent off - diminishing returns     
+
+            if not minetest.is_creative_enabled(clicker:get_player_name()) then
+                stack:take_item()
+                clicker:set_wielded_item(stack)
+            end
+        end
+    end
+end

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

@@ -120,3 +120,33 @@ mobs.tamed_effect = function(self)
         texture = "heart.png",
     })
 end
+
+--hearts when breeding
+mobs.breeding_effect = function(self)
+    local pos = self.object:get_pos()
+    local yaw = self.object:get_yaw()
+    local collisionbox = self.object:get_properties().collisionbox
+
+    local min, max
+
+    if collisionbox then
+        min = {x=collisionbox[1], y=collisionbox[2], z=collisionbox[3]}
+        max = {x=collisionbox[4], y=collisionbox[5], z=collisionbox[6]}
+    end
+
+    minetest_add_particlespawner({
+        amount = 2,
+        time = 0.0001,
+        minpos = vector.add(pos, min),
+        maxpos = vector.add(pos, max),
+        minvel = vector.new(-1,1,-1),
+        maxvel = vector.new(1,3,1),
+        minexptime = 0.7,
+        maxexptime = 1,
+        minsize = 1,
+        maxsize = 2,
+        collisiondetection = false,
+        vertical = false,
+        texture = "heart.png",
+    })
+end

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

@@ -107,12 +107,12 @@ mobs.mob_activate = function(self, staticdata, def, dtime)
 		mesh = def.gotten_mesh
 	end
 
-	-- set child objects to half size
+	-- set baby mobs to half size
-	if self.child == true then
+	if self.baby == true then
 
 		vis_size = {
-			x = self.base_size.x * .5,
+			x = self.base_size.x * self.baby_size,
-			y = self.base_size.y * .5,
+			y = self.base_size.y * self.baby_size,
 		}
 
 		if def.child_texture then
@@ -120,20 +120,20 @@ mobs.mob_activate = function(self, staticdata, def, dtime)
 		end
 
 		colbox = {
-			self.base_colbox[1] * .5,
+			self.base_colbox[1] * self.baby_size,
-			self.base_colbox[2] * .5,
+			self.base_colbox[2] * self.baby_size,
-			self.base_colbox[3] * .5,
+			self.base_colbox[3] * self.baby_size,
-			self.base_colbox[4] * .5,
+			self.base_colbox[4] * self.baby_size,
-			self.base_colbox[5] * .5,
+			self.base_colbox[5] * self.baby_size,
-			self.base_colbox[6] * .5
+			self.base_colbox[6] * self.baby_size
 		}
 		selbox = {
-			self.base_selbox[1] * .5,
+			self.base_selbox[1] * self.baby_size,
-			self.base_selbox[2] * .5,
+			self.base_selbox[2] * self.baby_size,
-			self.base_selbox[3] * .5,
+			self.base_selbox[3] * self.baby_size,
-			self.base_selbox[4] * .5,
+			self.base_selbox[4] * self.baby_size,
-			self.base_selbox[5] * .5,
+			self.base_selbox[5] * self.baby_size,
-			self.base_selbox[6] * .5
+			self.base_selbox[6] * self.baby_size
 		}
 	end
 

mods/ENTITIES/mobs_mc/cow+mooshroom.lua

@@ -48,15 +48,19 @@ local cow_def = {
 		walk_end = 40,      run_start = 0,		
 		run_end = 40,
 	},
-	follow = mobs_mc.follow.cow,
+	--follow = mobs_mc.follow.cow,
 	on_rightclick = function(self, clicker)
-		--if mobs:feed_tame(self, clicker, 1, true, true) then
-			--return
-		--end
 
-		--if self.child then
+		--attempt to enter breed state
-		--	return
+		if mobs.enter_breed_state(self,clicker) then
-		--end
+			return
+		end
+
+		if self.baby then
+			mobs.make_baby_grow_faster(self,clicker)
+			--do child timer thing %10
+			return
+		end
 
 		local item = clicker:get_wielded_item()
 		if item:get_name() == mobs_mc.items.bucket and clicker:get_inventory() then
@@ -75,6 +79,8 @@ local cow_def = {
 		end
 	end,
 	breedable = true,
+	breed_distance = 1.5,
+	baby_size = 0.5,
 	follow_distance = 2,
 	follow = mobs_mc.items.wheat,
 	view_range = 10,