mobs = {}

mobs.default_definition = {
	physical = true,
	jump = function (self)
		local v = self.object:getvelocity()
		v.y = 5
		self.object:setvelocity(v)
	end,

	
	timer = 0,
	env_damage_timer = 0, -- only if state = "attack"
	bombtimer = -999,
	attack = {player=nil, dist=nil},
	state = "stand",
	v_start = false,
	old_y = nil,
	lifetimer = 600,
	tamed = false,
	
	boom = function(self, tnt_range)
		local pos = self.object:getpos()
		self.object:remove()
		tnt:boom(pos)
	end,

	set_velocity = function(self, v)
		local get_flowing_dir = function(self)
			local pos = self.object:getpos()
			local param2 = minetest.get_node(pos).param2
			local p4 = {
				{x=1,y=0,z=0},
				{x=-1,y=0,z=0},
				{x=0,y=0,z=1},
				{x=0,y=0,z=-1},
			}
			local out = {x=0,y=0,z=0}
			local num = 0
			for i=1,4 do
				local p2 = vector.add(pos, p4[i])
				local name = minetest.get_node(p2).name
				local par2 = minetest.get_node(p2).param2
				-- param2 == 13 means water is falling down a block
				if (name == "default:water_flowing" and par2 < param2 and param2 < 13) or (name == "default:water_flowing" and par2 == 13) or name == "air" then
					out = vector.add(out, p4[i])
					num = num + 1
				end
			end
			if num then
				return out
			else
				return false
			end
		end
		local yaw = self.object:getyaw()
		if self.drawtype == "side" then
			yaw = yaw+(math.pi/2)
		end
		local x = math.sin(yaw) * -v
		local z = math.cos(yaw) * v
		local v1 = {x=x, y=self.object:getvelocity().y, z=z}
		local pos = self.object:getpos()
		local name = minetest.get_node(pos).name
		if name == "default:water_flowing" then
			local v = get_flowing_dir(self)
			if v then
				v1 = vector.add(v1, vector.multiply(v, 1.3))
			end
		end
		self.object:setvelocity(v1)
	end,
	
	get_velocity = function(self)
		local v = self.object:getvelocity()
		return (v.x^2 + v.z^2)^(0.5)
	end,
	
	set_animation = function(self, type)
		if not self.animation then
			return
		end
		if not self.animation.current then
			self.animation.current = ""
		end
		if type == "stand" and self.animation.current ~= "stand" then
			if
				self.animation.stand_start
				and self.animation.stand_end
				and self.animation.speed_normal
			then
				self.object:set_animation(
					{x=self.animation.stand_start,y=self.animation.stand_end},
					self.animation.speed_normal, 0
				)
				self.animation.current = "stand"
			end
		elseif type == "look" and self.animation.current ~= "look" then
			if
				self.animation.look_start
				and self.animation.look_end
				and self.animation.speed_normal
			then
				self.object:set_animation(
					{x=self.animation.look_start,y=self.animation.look_end},
					self.animation.speed_normal, 0
				)
				self.animation.current = "look"
			end
		elseif type == "eat" and self.animation.current ~= "eat" then
			if
				self.animation.eat_start
				and self.animation.eat_end
				and self.animation.speed_normal
			then
				self.object:set_animation(
					{x=self.animation.eat_start,y=self.animation.eat_end},
					self.animation.speed_normal, 0
				)
				self.animation.current = "eat"
				if self.name == "mobs:sheep" and self.naked then
					local pos = self.object:getpos()
					pos.y = pos.y - 1
					if minetest.get_node(pos).name == "default:dirt_with_grass" then
						minetest.set_node(pos, {name = "default:dirt"})
						self.naked = false
						if not self.color then
							self.object:set_properties({
							textures = {"sheep.png"},
							})
						else
							self.object:set_properties({
							textures = {"sheep_"..self.color..".png"},
							})
						end
					end
				end
			end
		elseif type == "shoot" and self.animation.current ~= "shoot" then
			if
				self.animation.shoot_start
				and self.animation.shoot_end
				and self.animation.speed_normal
			then
				self.object:set_animation(
					{x=self.animation.shoot_start,y=self.animation.shoot_end},
					self.animation.speed_normal, 0
				)
				self.animation.shootdur = (self.animation.shoot_end - self.animation.shoot_start)/self.animation.speed_normal - .5
				self.animation.current = "shoot"
			end
		elseif type == "fly" and self.animation.current ~= "fly" then
			if
				self.animation.fly_start
				and self.animation.fly_end
				and self.animation.speed_normal
			then
				self.object:set_animation(
					{x=self.animation.fly_start,y=self.animation.fly_end},
					self.animation.speed_normal, 0
				)
				self.animation.current = "fly"
			end
		elseif type == "walk" and self.animation.current ~= "walk"  then
			if
				self.animation.walk_start
				and self.animation.walk_end
				and self.animation.speed_normal
			then
				self.object:set_animation(
					{x=self.animation.walk_start,y=self.animation.walk_end},
					self.animation.speed_normal, 0
				)
				self.animation.current = "walk"
			end
		elseif type == "run" and self.animation.current ~= "run"  then
			if
				self.animation.run_start
				and self.animation.run_end
				and self.animation.speed_run
			then
				self.object:set_animation(
					{x=self.animation.run_start,y=self.animation.run_end},
					self.animation.speed_run, 0
				)
				self.animation.current = "run"
			end
		elseif type == "punch" and self.animation.current ~= "punch"  then
			if
				self.animation.punch_start
				and self.animation.punch_end
				and self.animation.speed_normal
			then
				self.object:set_animation(
					{x=self.animation.punch_start,y=self.animation.punch_end},
					self.animation.speed_normal, 0
				)
				self.animation.current = "punch"
			end
		elseif type == "hurt" and self.animation.current ~= "hurt"  then
			self.animation.hurtdur = .5
			if
				self.animation.hurt_start
				and self.animation.hurt_end
				and self.animation.speed_normal
			then
				self.object:set_animation(
					{x=self.animation.hurt_start,y=self.animation.hurt_end},
					self.animation.speed_normal, 0
				)
				self.animation.current = "hurt"
				self.animation.hurtdur = (self.animation.hurt_end - self.animation.hurt_start)/self.animation.speed_normal - 1
			end
		elseif type == "death" and self.animation.current ~= "death"  then
			self.animation.deathdur = 1
			if
				self.animation.death_start
				and self.animation.death_end
				and self.animation.speed_normal
			then
				self.object:set_animation(
					{x=self.animation.death_start,y=self.animation.death_end},
					self.animation.speed_normal, 0
				)
				self.animation.current = "death"
				self.animation.deathdur = (self.animation.death_end - self.animation.death_start)/self.animation.speed_normal - .5
			end
		end
	end,
	
	on_step = function(self, dtime)
		if self.type == "monster" and minetest.setting_getbool("only_peaceful_mobs") then
			self.object:remove()
		end
		
		self.lifetimer = self.lifetimer - dtime
		if self.lifetimer <= 0 and not self.tamed then
			local player_count = 0
			for _,obj in ipairs(minetest.get_objects_inside_radius(self.object:getpos(), 30)) do
				if obj:is_player() then
					player_count = player_count+1
				end
			end
			if player_count == 0 and self.state ~= "attack" then
				self.object:remove()
				return
			end
		end
		if self.object:getvelocity().y > 0.1 then
			local yaw = self.object:getyaw()
			if self.drawtype == "side" then
				yaw = yaw+(math.pi/2)
			end
			local x = math.sin(yaw) * -2
			local z = math.cos(yaw) * 2
			self.object:setacceleration({x=x, y=-10, z=z})
		else
			self.object:setacceleration({x=0, y=-10, z=0})
		end
		
		if self.disable_fall_damage and self.object:getvelocity().y == 0 then
			if not self.old_y then
				self.old_y = self.object:getpos().y
			else
				local d = self.old_y - self.object:getpos().y
				if d > 5 then
					local damage = d-5
					self.object:set_hp(self.object:get_hp()-damage)
					if self.object:get_hp() == 0 then
						self.object:remove()
					end
				end
				self.old_y = self.object:getpos().y
			end
		end
		
		self.timer = self.timer+dtime
		self.bombtimer = self.bombtimer+dtime
		if self.state ~= "attack" then
			if self.timer < 1 then
				return
			end
			self.timer = 0
		end
		
		if self.sounds and self.sounds.random and math.random(1, 100) <= 1 then
			minetest.sound_play(self.sounds.random, {object = self.object})
		end
		
		local do_env_damage = function(self)
			local pos = self.object:getpos()
			local n = minetest.get_node(pos)
			
			if self.light_damage and self.light_damage ~= 0
				and pos.y>0
				and minetest.get_node_light(pos)
				and minetest.get_node_light(pos) > 4
				and minetest.get_timeofday() > 0.2
				and minetest.get_timeofday() < 0.8
			then
				self.object:set_hp(self.object:get_hp()-self.light_damage)
				if self.object:get_hp() == 0 then
					self.object:remove()
				end
			end
			
			if self.water_damage and self.water_damage ~= 0 and
				minetest.get_item_group(n.name, "water") ~= 0
			then
				self.object:set_hp(self.object:get_hp()-self.water_damage)
				if self.object:get_hp() == 0 then
					self.object:remove()
				end
			end
			
			if self.lava_damage and self.lava_damage ~= 0 and
				minetest.get_item_group(n.name, "lava") ~= 0
			then
				self.object:set_hp(self.object:get_hp()-self.lava_damage)
				if self.object:get_hp() == 0 then
					self.object:remove()
				end
			end
		end

		-- ridable pigs
		if self.name == "mobs:pig" and self.saddle == "yes" and self.driver then
			local item = self.driver:get_wielded_item()
			if item:get_name() == "mobs:carrotstick" then
				local yaw = self.driver:get_look_yaw() - math.pi / 2
				local velo = self.object:getvelocity()
				local v = 1.5
				if math.abs(velo.x) + math.abs(velo.z) < .6 then velo.y = 5 end
				self.state = "walk"
				self:set_animation("walk")
				self.object:setyaw(yaw)
				self.object:setvelocity({x = -math.sin(yaw) * v, y = velo.y, z = math.cos(yaw) * v})

				local inv = self.driver:get_inventory()
				local stack = inv:get_stack("main", self.driver:get_wield_index())
				stack:add_wear(100)
				if stack:get_wear() > 65400 then
					stack = {name = "fishing:pole", count = 1}
				end
				inv:set_stack("main", self.driver:get_wield_index(), stack)
				return
			end
		end

		self.env_damage_timer = self.env_damage_timer + dtime
		if self.state == "attack" and self.env_damage_timer > 1 then
			self.env_damage_timer = 0
			do_env_damage(self)
		elseif self.state ~= "attack" then
			do_env_damage(self)
		end
		
		if self.type == "monster" and minetest.setting_getbool("enable_damage") then
			for _,player in pairs(minetest.get_connected_players()) do
				local s = self.object:getpos()
				local p = player:getpos()
				local dist = ((p.x-s.x)^2 + (p.y-s.y)^2 + (p.z-s.z)^2)^0.5
				if dist < 2 and self.attack_type == "bomb" and self.bombmode ~= "armed" then
					if self.sounds and self.sounds.approach then
						minetest.sound_play(self.sounds.approach, {object = self.object})
					end
					self.bombmode = "armed"
					self.bombtimer = 0
				end
				if dist < self.view_range then
					if self.attack.dist then
						if dist < self.attack.dist then
							self.attack.player = player
							self.attack.dist = dist
						end
					else
						self.state = "attack"
						self.attack.player = player
						self.attack.dist = dist
					end
				end
			end
		end
		
		if self.follow and self.follow ~= "" and not self.following then
			for _,player in pairs(minetest.get_connected_players()) do
				local s = self.object:getpos()
				local p = player:getpos()
				local dist = ((p.x-s.x)^2 + (p.y-s.y)^2 + (p.z-s.z)^2)^0.5
				if self.view_range and dist < self.view_range then
					self.following = player
				end
			end
		end
		
		if self.following and self.following:is_player() then
			if self.following:get_wielded_item():get_name() ~= self.follow then
				self.following = nil
				self.v_start = false
			else
				local s = self.object:getpos()
				local p = self.following:getpos()
				local dist = ((p.x-s.x)^2 + (p.y-s.y)^2 + (p.z-s.z)^2)^0.5
				if dist > self.view_range then
					self.following = nil
					self.v_start = false
				else
					local vec = {x=p.x-s.x, y=p.y-s.y, z=p.z-s.z}
					local yaw = math.atan(vec.z/vec.x)+math.pi/2
					if self.drawtype == "side" then
						yaw = yaw+(math.pi/2)
					end
					if p.x > s.x then
						yaw = yaw+math.pi
					end
					self.object:setyaw(yaw)
					if dist > 2 then
						if not self.v_start then
							self.v_start = true
							self.set_velocity(self, self.walk_velocity)
						else
							if self.jump and self.get_velocity(self) <= 0.5 and self.object:getvelocity().y == 0 then
								self:jump()
							end
							self.set_velocity(self, self.walk_velocity)
						end
						self:set_animation("walk")
					else
						self.v_start = false
						self.set_velocity(self, 0)
						self:set_animation("stand")
					end
					return
				end
			end
		end
		
		if self.state == "stand" then
			if math.random(1, 4) == 1 then
				self.object:setyaw(self.object:getyaw()+((math.random(0,360)-180)/180*math.pi))
			end
			self.set_velocity(self, 0)
			self.set_animation(self, "stand")
			local standanim = math.random(1,4)
			if standanim == 2 then
				self.set_animation(self, "look")
			elseif standanim == 3 then
				self.set_animation(self, "eat")
			elseif standanim == 4 then
				self.set_animation(self, "fly")
			end
			if math.random(1, 100) <= 50 then
				self.set_velocity(self, self.walk_velocity)
				self.state = "walk"
				self.set_animation(self, "walk")
			end
		elseif self.state == "walk" then
			if math.random(1, 100) <= 30 then
				self.object:setyaw(self.object:getyaw()+((math.random(0,360)-180)/180*math.pi))
			end
			if self.jump and self.get_velocity(self) <= 0.5 and self.object:getvelocity().y == 0 then
				self:jump()
			end
			self:set_animation("walk")
			self.set_velocity(self, self.walk_velocity)
			if math.random(1, 100) <= 10 then
				self.set_velocity(self, 0)
				self.state = "stand"
				self:set_animation("stand")
			end
		elseif self.state == "attack" and (self.attack_type == "dogfight" or self.attack_type == "bomb") then
			if not self.attack.player or not self.attack.player:is_player() then
				self.state = "stand"
				self:set_animation("stand")
				self.attack = {player=nil, dist=nil}
				return
			end
			local s = self.object:getpos()
			local p = self.attack.player:getpos()
			local dist = ((p.x-s.x)^2 + (p.y-s.y)^2 + (p.z-s.z)^2)^0.5
			if dist > self.view_range or self.attack.player:get_hp() <= 0 then
				self.state = "stand"
				self.v_start = false
				self.set_velocity(self, 0)
				self.attack = {player=nil, dist=nil}
				self:set_animation("stand")
				return
			else
				self.attack.dist = dist
			end
			if self.attack_type == "bomb" and self.bombmode == "armed" and self.bombtimer > 2 then
				-- print("***BOOM",self.bombtimer)
				self.bombmode = "exploded"
				self.boom(self, math.random(2, 4))
			end
			local vec = {x=p.x-s.x, y=p.y-s.y, z=p.z-s.z}
			local yaw = math.atan(vec.z/vec.x)+math.pi/2
			if self.drawtype == "side" then
				yaw = yaw+(math.pi/2)
			end
			if p.x > s.x then
				yaw = yaw+math.pi
			end
			-- creepers use a spiraling approach:
			if self.attack_type == "bomb" then
				yaw = yaw - 14*math.pi/180
			end
			self.object:setyaw(yaw)
			if self.attack.dist > 2 then
				if not self.v_start then
					self.v_start = true
					self.set_velocity(self, self.run_velocity)
				else
					if self.jump and self.get_velocity(self) <= 0.5 and self.object:getvelocity().y == 0 then
						self:jump()
					end
					self.set_velocity(self, self.run_velocity)
				end
				self:set_animation("run")
			else
				self.set_velocity(self, 0)
				self:set_animation("punch")
				self.v_start = false
				if self.timer > 1 then
					self.timer = 0
					if self.sounds and self.sounds.attack then
						minetest.sound_play(self.sounds.attack, {object = self.object})
					end
					self.attack.player:punch(self.object, 1.0,  {
						full_punch_interval=1.0,
						damage_groups = {fleshy=self.damage}
					}, vec)
				end
			end
		elseif self.state == "attack" and self.attack_type == "shoot" then
			if not self.attack.player or not self.attack.player:is_player() then
				self.state = "stand"
				self:set_animation("stand")
				self.attack = {player=nil, dist=nil}
				return
			end
			local s = self.object:getpos()
			local p = self.attack.player:getpos()
			local dist = ((p.x-s.x)^2 + (p.y-s.y)^2 + (p.z-s.z)^2)^0.5
			if dist > self.view_range or self.attack.player:get_hp() <= 0 then
				self.state = "stand"
				self.v_start = false
				self.set_velocity(self, 0)
				self.attack = {player=nil, dist=nil}
				self:set_animation("stand")
				return
			else
				self.attack.dist = dist
				self.shoot_interval = (dist + self.view_range) / self.view_range
			end
			
			local vec = {x=p.x-s.x, y=p.y-s.y, z=p.z-s.z}
			local yaw = math.atan(vec.z/vec.x)+math.pi/2
			if self.drawtype == "side" then
				yaw = yaw+(math.pi/2)
			end
			if p.x > s.x then
				yaw = yaw+math.pi
			end
			self.object:setyaw(yaw)
			if self.attack.dist < 4 then
				self.set_velocity(self, -self.run_velocity)
			elseif self.attack.dist > 8 then
				self.set_velocity(self, self.run_velocity)
			else
				self.set_velocity(self, 0)
			end
			if self.timer > self.shoot_interval and math.random(1, 100) <= 60 then
				self.timer = 0
				
				self:set_animation("shoot")
				minetest.after(self.animation.shootdur, function()
				self:set_animation("walk")
				end)
				if self.sounds and self.sounds.attack then
					minetest.sound_play(self.sounds.attack, {object = self.object})
				end
				
				local p = self.object:getpos()
				p.y = p.y + (self.collisionbox[2]+self.collisionbox[5])/2
				local obj = minetest.add_entity(p, self.arrow)
				local amount = (vec.x^2+vec.y^2+vec.z^2)^0.5
				local v = 15
				vec.y = vec.y+1
				vec.x = vec.x*v/amount
				vec.y = vec.y*v/amount
				vec.z = vec.z*v/amount
				obj:setvelocity(vec)
			end
		end
	end,
	
	on_activate = function(self, staticdata, dtime_s)
		self.object:set_armor_groups({fleshy=self.armor})
		self.object:setacceleration({x=0, y=-10, z=0})
		self.state = "stand"
		self.attack = {player = nil, dist = nil}
		self.object:setvelocity({x=0, y=self.object:getvelocity().y, z=0})
		self.object:setyaw(math.random(1, 360)/180*math.pi)
		if self.type == "monster" and minetest.setting_getbool("only_peaceful_mobs") then
			self.object:remove()
		end
		self.lifetimer = 600 - dtime_s
		if staticdata then
			local tmp = minetest.deserialize(staticdata)
			if tmp and tmp.lifetimer then
				self.lifetimer = tmp.lifetimer - dtime_s
			end
			if tmp and tmp.tamed then
				self.tamed = tmp.tamed
			end
			if tmp and tmp.color then
				self.color = tmp.color
			end
			if tmp and tmp.naked then
				self.naked = tmp.naked
			end
			if tmp and tmp.saddle then
				self.saddle = tmp.saddle
			end
		end
		if self.name == "mobs:sheep" and self.color and not self.naked then
			self.object:set_properties({
			textures = {"sheep_"..self.color..".png"},
			})
			self.drops = {
				{name = "mobs:mutton_raw",
				chance = 1,
				min = 1,
				max = 2,},
				{name = "wool:"..self.color,
				chance = 1,
				min = 1,
				max = 1,},
			}
		end
		if self.name == "mobs:sheep" and not self.color then
			local col = "white"
			local cols = {"dark_grey", "grey", "black", "brown", "pink"}
			if math.random(100) > 80 then
				col = cols[math.random(1,5)]
			end
			self.color = col
			self.object:set_properties({
			textures = {"sheep_"..self.color..".png"},
			})
			self.drops = {
				{name = "mobs:mutton_raw",
				chance = 1,
				min = 1,
				max = 2,},
				{name = "wool:"..self.color,
				chance = 1,
				min = 1,
				max = 1,},
			}
		end
		if self.name == "mobs:sheep" and self.naked then
			self.object:set_properties({
			textures = {"sheep_sheared.png"},
			})
		end
		if self.name == "mobs:pig" and self.saddle == "yes" then
			self.object:set_properties({
			textures = {"pig_with_saddle.png"},
			})
		end

		if self.lifetimer <= 0 and not self.tamed then
			self.object:remove()
		end
	end,
	
	get_staticdata = function(self)
		local tmp = {
			lifetimer = self.lifetimer,
			tamed = self.tamed,
			color = self.color,
			naked = self.naked,
			saddle = self.saddle,
		}
		return minetest.serialize(tmp)
	end,
	
	on_punch = function(self, hitter)
	-- death happens at 20 hp so we can play the death animation:
		if self.object:get_hp() <= 20 then
			local pos = self.object:getpos()
minetest.add_particlespawner({
	amount = 20,
	time = .2,
	minpos = {x=pos.x-1, y=pos.y-.5, z=pos.z-1},
	maxpos = {x=pos.x+1, y=pos.y+.5, z=pos.z+1},
	minvel = {x=0, y=.3, z=0},
	maxvel = {x=0, y=2, z=0},
	minacc = {x=-.2, y=-.2, z=-.2},
	maxacc = {x=.2, y=.2, z=.2},
	minexptime = 1,
	maxexptime = 5,
	minsize = 1,
	maxsize = 1,
	collisiondetection = false,
	vertical = false,
	texture = "bettertnt_smoke.png",
})
			self:set_animation("death")
			self.object:set_hp(1000)
			if self.name == "mobs:pig" and self.driver then
				local name = self.driver:get_player_name()
				self.driver:set_detach()
				default.player_attached[name] = false
				default.player_set_animation(self.driver, "stand" , 30)
				self.driver = nil
			end
			minetest.after(self.animation.deathdur, function()
				self.object:remove()
			end)
			if self.sounds and self.sounds.death then
				minetest.sound_play(self.sounds.death, {object = self.object})
			end
			pos.y = pos.y + 0.5
			local obj = nil
			local ndrops = 0
			for _,drop in ipairs(self.drops) do
				if math.random(1, drop.chance) == 1 and ndrops < (self.maxdrops or 100) then
					obj = minetest.add_item(pos, ItemStack(drop.name.." "..math.random(drop.min, drop.max)))
					ndrops = ndrops + 1
					if obj then
						obj:setvelocity({x=math.random(-1,1), y=5, z=math.random(-1,1)})
					end
				end
			end
		else
			if self.sounds and self.sounds.hurt then
				minetest.sound_play(self.sounds.hurt, {object = self.object})
			end
			self:set_animation("hurt")
			minetest.after(self.animation.hurtdur, function()
				self:set_animation("walk")
			end)
		end
	end,

	__index = function(table,key)
		return mobs.default_definition[key]
	end,}

function mobs:register_mob(name, def)
	setmetatable (def,mobs.default_definition)
	minetest.register_entity(name, def)
end

function mobs:check_player_dist(pos, node)
	for _,player in pairs(minetest.get_connected_players()) do
		local p = player:getpos()
		local dist = ((p.x-pos.x)^2 + (p.y-pos.y)^2 + (p.z-pos.z)^2)^0.5
		if dist < 24 then
			return 1
		end
	end
	return nil
end

mobs.spawning_mobs = {}
function mobs:register_spawn(name, nodes, max_light, min_light, chance, active_object_count, max_height, spawn_func)
	if minetest.setting_getbool(string.gsub(name,":","_").."_spawn") ~= false then
		mobs.spawning_mobs[name] = true
		minetest.register_abm({
			nodenames = nodes,
			neighbors = {"air"},
			interval = 10,
			chance = chance,
			action = function(pos, node, _, active_object_count_wider)
				if node.name == "default:ice" or node.name == "default:glass" then
					return
				end
				if active_object_count_wider > active_object_count then
					return
				end
				if not mobs.spawning_mobs[name] then
					return
				end
				pos.y = pos.y+1
				if not minetest.get_node_light(pos) then
					return
				end
				if minetest.get_node_light(pos) > max_light then
					return
				end
				if minetest.get_node_light(pos) < min_light then
					return
				end
				if pos.y > max_height then
					return
				end
				if minetest.get_node(pos).name ~= "air" then
					return
				end
				pos.y = pos.y+1
				if minetest.get_node(pos).name ~= "air" then
					return
				end
				if spawn_func and not spawn_func(pos, node) then
					return
				end
				if mobs:check_player_dist(pos, node) then
					return
				end
				if minetest.setting_getbool("display_mob_spawn") then
					minetest.chat_send_all("[mobs] Add "..name.." at "..minetest.pos_to_string(pos))
				end
				minetest.add_entity(pos, name)
			end
		})
	end
end

function mobs:register_arrow(name, def)
	minetest.register_entity(name, {
		physical = false,
		visual = def.visual,
		visual_size = def.visual_size,
		textures = def.textures,
		velocity = def.velocity,
		hit_player = def.hit_player,
		hit_node = def.hit_node,
		
		on_step = function(self, dtime)
			local pos = self.object:getpos()
			if minetest.get_node(self.object:getpos()).name ~= "air" then
				minetest.sound_play("bowhit1", {pos = pos})
				self.hit_node(self, pos, node)
				self.object:remove()
				return
			end
			pos.y = pos.y-1
			for _,player in pairs(minetest.get_objects_inside_radius(pos, 1)) do
				if player:is_player() then
					self.hit_player(self, player)
					minetest.sound_play("damage", {pos = pos})
					self.object:remove()
					return
				end
			end
		end
	})
end

function mobs:register_egg(mob, desc, img)
minetest.register_craftitem(mob, {
	description = "Spawn "..desc,
	inventory_image = img,
	on_place = function(itemstack, placer, pointed_thing)
		local pos = pointed_thing.above
		if pointed_thing.above and not minetest.is_protected(pos, placer:get_player_name()) then
			pos.y = pos.y + 0.5
			minetest.add_entity(pos, mob)
			if not minetest.setting_getbool("creative_mode") then
				itemstack:take_item()
			end
		end
		return itemstack
	end,
})
end