VoxeLibre/mods/ENTITIES/mcl_mobs/api.lua

-- API for Mobs Redo: MineClone 2 Delux 2.0 DRM Free Early Access Super Extreme Edition

-- current state of things: Why?

-- lua locals

--localize minetest functions
local minetest_settings                     = minetest.settings
local minetest_get_objects_inside_radius    = minetest.get_objects_inside_radius
local minetest_get_modpath                  = minetest.get_modpath
local minetest_registered_nodes             = minetest.registered_nodes
local minetest_get_node                     = minetest.get_node
local minetest_get_item_group               = minetest.get_item_group
local minetest_registered_entities          = minetest.registered_entities
local minetest_line_of_sight                = minetest.line_of_sight
local minetest_after                        = minetest.after
local minetest_sound_play                   = minetest.sound_play
local minetest_add_particlespawner          = minetest.add_particlespawner
local minetest_registered_items             = minetest.registered_items
local minetest_set_node                     = minetest.set_node
local minetest_add_item                     = minetest.add_item
local minetest_get_craft_result             = minetest.get_craft_result
local minetest_find_path                    = minetest.find_path
local minetest_is_protected                 = minetest.is_protected
local minetest_is_creative_enabled          = minetest.is_creative_enabled
local minetest_find_node_near               = minetest.find_node_near
local minetest_find_nodes_in_area_under_air = minetest.find_nodes_in_area_under_air
local minetest_raycast                      = minetest.raycast
local minetest_get_us_time                  = minetest.get_us_time
local minetest_add_entity                   = minetest.add_entity
local minetest_get_natural_light            = minetest.get_natural_light
local minetest_get_node_or_nil              = minetest.get_node_or_nil

-- localize math functions
local math_pi     = math.pi
local math_sin    = math.sin
local math_cos    = math.cos
local math_abs    = math.abs
local math_min    = math.min
local math_max    = math.max
local math_atan   = math.atan
local math_random = math.random
local math_floor  = math.floor

-- localize vector functions
local vector_new = vector.new

mobs = {}
-- mob constants
local MAX_MOB_NAME_LENGTH = 30
local BREED_TIME          = 30
local BREED_TIME_AGAIN    = 300
local CHILD_GROW_TIME     = 60*20
local DEATH_DELAY         = 0.5
local DEFAULT_FALL_SPEED  = -10
local FLOP_HEIGHT         = 5.0
local FLOP_HOR_SPEED      = 1.5

local MOB_CAP   = {}
MOB_CAP.hostile = 70
MOB_CAP.passive = 10
MOB_CAP.ambient = 15
MOB_CAP.water   = 15

-- Load settings
local damage_enabled    = minetest_settings:get_bool("enable_damage")
local disable_blood     = minetest_settings:get_bool("mobs_disable_blood")
local mobs_drop_items   = minetest_settings:get_bool("mobs_drop_items") ~= false
local mobs_griefing     = minetest_settings:get_bool("mobs_griefing") ~= false
local spawn_protected   = minetest_settings:get_bool("mobs_spawn_protected") ~= false
local remove_far        = true
local difficulty        = tonumber(minetest_settings:get("mob_difficulty")) or 1.0
local show_health       = false
local max_per_block     = tonumber(minetest_settings:get("max_objects_per_block") or 64)
local mobs_spawn_chance = tonumber(minetest_settings:get("mobs_spawn_chance") or 2.5)


-- random locals I found
local los_switcher = false
local height_switcher = false

-- Localize
local S = minetest.get_translator("mcl_mobs")

-- CMI support check
local use_cmi = minetest.global_exists("cmi")


-- Invisibility mod check
mobs.invis = {}
if minetest.global_exists("invisibility") then
	mobs.invis = invisibility
end


-- creative check
function mobs.is_creative(name)
	return minetest.is_creative_enabled(name)
end


local atan = function(x)
	if not x or x ~= x then
		return 0
	else
		return math_atan(x)
	end
end




-- Shows helpful debug info above each mob
local mobs_debug = minetest_settings:get_bool("mobs_debug", false)

-- 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)
		minetest.chat_send_player(player:get_player_name(),
			S("Peaceful mode active! No monsters will spawn."))
	end)
end

-- pathfinding settings
local enable_pathfinding = true
local stuck_timeout = 3 -- how long before mob gets stuck in place and starts searching
local stuck_path_timeout = 10 -- how long will mob follow path before giving up

-- default nodes
local node_ice = "mcl_core:ice"
local node_snowblock = "mcl_core:snowblock"
local node_snow = "mcl_core:snow"
mobs.fallback_node = minetest.registered_aliases["mapgen_dirt"] or "mcl_core:dirt"

local mod_weather = minetest_get_modpath("mcl_weather") ~= nil
local mod_explosions = minetest_get_modpath("mcl_explosions") ~= nil
local mod_mobspawners = minetest_get_modpath("mcl_mobspawners") ~= nil
local mod_hunger = minetest_get_modpath("mcl_hunger") ~= nil
local mod_worlds = minetest_get_modpath("mcl_worlds") ~= nil
local mod_armor = minetest_get_modpath("mcl_armor") ~= nil
local mod_experience = minetest_get_modpath("mcl_experience") ~= nil



-- play sound
local mob_sound = function(self, soundname, is_opinion, fixed_pitch)

	local soundinfo
	if self.sounds_child and self.child then
		soundinfo = self.sounds_child
	elseif self.sounds then
		soundinfo = self.sounds
	end
	if not soundinfo then
		return
	end
	local sound = soundinfo[soundname]
	if sound then
		if is_opinion and self.opinion_sound_cooloff > 0 then
			return
		end
		local pitch
		if not fixed_pitch then
			local base_pitch = soundinfo.base_pitch
			if not base_pitch then
				base_pitch = 1
			end
			if self.child and (not self.sounds_child) then
				-- Children have higher pitch
				pitch = base_pitch * 1.5
			else
				pitch = base_pitch
			end
			-- randomize the pitch a bit
			pitch = pitch + math_random(-10, 10) * 0.005
		end
		minetest_sound_play(sound, {
			object = self.object,
			gain = 1.0,
			max_hear_distance = self.sounds.distance,
			pitch = pitch,
		}, true)
		self.opinion_sound_cooloff = 1
	end
end

-- Return true if object is in view_range
local function object_in_range(self, object)
	if not object then
		return false
	end
	local factor
	-- Apply view range reduction for special player armor
	if object:is_player() and mod_armor then
		factor = armor:get_mob_view_range_factor(object, self.name)
	end
	-- Distance check
	local dist
	if factor and factor == 0 then
		return false
	elseif factor then
		dist = self.view_range * factor
	else
		dist = self.view_range
	end

	local p1, p2 = self.object:get_pos(), object:get_pos()
	return p1 and p2 and (vector.distance(p1, p2) <= dist)
end

-- attack player/mob
local do_attack = function(self, player)

	if self.state == "attack" or self.state == "die" then
		return
	end

	self.attack = player
	self.state = "attack"

	-- TODO: Implement war_cry sound without being annoying
	--if math_random(0, 100) < 90 then
		--mob_sound(self, "war_cry", true)
	--end
end

local collision = function(self)
	pos = self.object:get_pos()
	--do collision detection from the base of the mob
	
	collisionbox = self.object:get_properties().collisionbox

	pos.y = pos.y + collisionbox[2]
	
	collision_boundary = collisionbox[4]

	radius = collision_boundary

	if collisionbox[5] > collision_boundary then
		radius = collisionbox[5]
	end

	collision_count = 0

	for _,object in ipairs(minetest_get_objects_inside_radius(pos, radius*1.25)) do
		if object ~= self.object and (object:is_player() or object:get_luaentity()._cmi_is_mob == true) and
		--don't collide with rider, rider don't collide with thing
		(not object:get_attach() or (object:get_attach() and object:get_attach() ~= self.object)) and 
		(not self.object:get_attach() or (self.object:get_attach() and self.object:get_attach() ~= object)) then
			--stop infinite loop
			collision_count = collision_count + 1
			if collision_count > 100 then
				break
			end
			pos2 = object:get_pos()
			
			object_collisionbox = object:get_properties().collisionbox

			pos2.y = pos2.y + object_collisionbox[2]

			object_collision_boundary = object_collisionbox[4]


			--this is checking the difference of the object collided with's possision
			--if positive top of other object is inside (y axis) of current object
			y_base_diff = (pos2.y + object_collisionbox[5]) - pos.y

			y_top_diff = (pos.y + collisionbox[5]) - pos2.y


			distance = vector.distance(vector.new(pos.x,0,pos.z),vector.new(pos2.x,0,pos2.z))

			if distance <= collision_boundary + object_collision_boundary and y_base_diff >= 0 and y_top_diff >= 0 then

				dir = vector.direction(pos,pos2)
				dir.y = 0
				
				--eliminate mob being stuck in corners
				if dir.x == 0 and dir.z == 0 then
					dir = vector.new(math_random(-1,1)*math_random(),0,math_random(-1,1)*math_random())
				end

				local velocity = vector.multiply(dir,1.1)

				--local velocity = vector.normalize(dir)
				
				vel1 = vector.multiply(velocity, -1)
				vel2 = velocity

				self.object:add_velocity(vel1)
				
				--reenable fire spreading eventually

				if object:is_player() then
					object:add_player_velocity(vel2)

					--if self.on_fire then
					--	start_fire(object)
					--end

					--if is_player_on_fire(object) then
					--	start_fire(self.object)
					--end

				else
					object:add_velocity(vel2)
					--if self.on_fire then
					--	start_fire(object)
					--end
					--if object:get_luaentity().on_fire then
					--	start_fire(self.object)
					--end
				end
			end
		end
	end
end



-- move mob in facing direction
local set_velocity = function(self, v)
	local c_x, c_y = 0, 0

	-- halt mob if it has been ordered to stay
	if self.order == "stand" then
		self.object:set_velocity({x = 0, y = 0, z = 0})
		return
	end

	local yaw = (self.object:get_yaw() or 0) + self.rotate

	self.object:add_velocity({
		x = (math_sin(yaw) * -v) + c_x,
		y = self.object:get_velocity().y,
		z = (math_cos(yaw) * v) + c_y,
	})
end



-- calculate mob velocity
local get_velocity = function(self)

	local v = self.object:get_velocity()
	if v then
		return (v.x * v.x + v.z * v.z) ^ 0.5
	end

	return 0
end

local function update_roll(self)
	local is_Fleckenstein = self.nametag == "Fleckenstein"
	local was_Fleckenstein = false

	local rot = self.object:get_rotation()
	rot.z = is_Fleckenstein and math_pi or 0
	self.object:set_rotation(rot)

	local cbox = table.copy(self.collisionbox)
	local acbox = self.object:get_properties().collisionbox

	if math_abs(cbox[2] - acbox[2]) > 0.1 then
		was_Fleckenstein = true
	end

	if is_Fleckenstein ~= was_Fleckenstein then
		local pos = self.object:get_pos()
		pos.y = pos.y + (acbox[2] + acbox[5])
		self.object:set_pos(pos)
	end

	if is_Fleckenstein then
		cbox[2], cbox[5] = -cbox[5], -cbox[2]
	end

	self.object:set_properties({collisionbox = cbox})
end

-- set and return valid yaw
local set_yaw = function(self, yaw, delay, dtime)

	if not yaw or yaw ~= yaw then
		yaw = 0
	end

	delay = delay or 0

	if delay == 0 then
		if self.shaking and dtime then
			yaw = yaw + (math_random() * 2 - 1) * 5 * dtime
		end
		self.object:set_yaw(yaw)
		update_roll(self)
		return yaw
	end

	self.target_yaw = yaw
	self.delay = delay

	return self.target_yaw
end

-- global function to set mob yaw
function mobs:yaw(self, yaw, delay, dtime)
	set_yaw(self, yaw, delay, dtime)
end


-- set defined animation
local set_animation = function(self, anim, fixed_frame)
	if not self.animation or not anim then
		return
	end
	if self.state == "die" and anim ~= "die" and anim ~= "stand" then
		return
	end

	self.animation.current = self.animation.current or ""

	if (anim == self.animation.current
	or not self.animation[anim .. "_start"]
	or not self.animation[anim .. "_end"]) and self.state ~= "die" then
		return
	end

	self.animation.current = anim

	local a_start = self.animation[anim .. "_start"]
	local a_end
	if fixed_frame then
		a_end = a_start
	else
		a_end = self.animation[anim .. "_end"]
	end

	self.object:set_animation({
		x = a_start,
		y = a_end},
		self.animation[anim .. "_speed"] or self.animation.speed_normal or 15,
		0, self.animation[anim .. "_loop"] ~= false)
end


-- above function exported for mount.lua
function mobs:set_animation(self, anim)
	set_animation(self, anim)
end

mobs.death_effect = function(pos, yaw, collisionbox, rotate)
	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]}
	else
		min = { x = -0.5, y = 0, z = -0.5 }
		max = { x = 0.5, y = 0.5, z = 0.5 }
	end
	if rotate then
		min = vector.rotate(min, {x=0, y=yaw, z=math_pi/2})
		max = vector.rotate(max, {x=0, y=yaw, z=math_pi/2})
		min, max = vector.sort(min, max)
		min = vector.multiply(min, 0.5)
		max = vector.multiply(max, 0.5)
	end

	minetest_add_particlespawner({
		amount = 50,
		time = 0.001,
		minpos = vector.add(pos, min),
		maxpos = vector.add(pos, max),
		minvel = vector.new(-5,-5,-5),
		maxvel = vector.new(5,5,5),
		minexptime = 1.1,
		maxexptime = 1.5,
		minsize = 1,
		maxsize = 2,
		collisiondetection = false,
		vertical = false,
		texture = "mcl_particles_mob_death.png^[colorize:#000000:255",
	})

	minetest_sound_play("mcl_mobs_mob_poof", {
		pos = pos,
		gain = 1.0,
		max_hear_distance = 8,
	}, true)
end


-- check if within physical map limits (-30911 to 30927)
local within_limits, wmin, wmax = nil, -30913, 30928
within_limits = function(pos, radius)
	if mcl_vars then
		if mcl_vars.mapgen_edge_min and mcl_vars.mapgen_edge_max then
			wmin, wmax = mcl_vars.mapgen_edge_min, mcl_vars.mapgen_edge_max
			within_limits = function(pos, radius)
				return pos
					and (pos.x - radius) > wmin and (pos.x + radius) < wmax
					and (pos.y - radius) > wmin and (pos.y + radius) < wmax
					and (pos.z - radius) > wmin and (pos.z + radius) < wmax
			end
		end
	end
	return pos
		and (pos.x - radius) > wmin and (pos.x + radius) < wmax
		and (pos.y - radius) > wmin and (pos.y + radius) < wmax
		and (pos.z - radius) > wmin and (pos.z + radius) < wmax
end


-- is mob facing a cliff or danger
local is_at_cliff_or_danger = function(self)

	if self.fear_height == 0 then -- 0 for no falling protection!
		return false
	end

	if not self.object:get_luaentity() then
		return false
	end
	local yaw = self.object:get_yaw()
	local dir_x = -math_sin(yaw) * (self.collisionbox[4] + 0.5)
	local dir_z = math_cos(yaw) * (self.collisionbox[4] + 0.5)
	local pos = self.object:get_pos()
	local ypos = pos.y + self.collisionbox[2] -- just above floor

	local free_fall, blocker = minetest_line_of_sight(
		{x = pos.x + dir_x, y = ypos, z = pos.z + dir_z},
		{x = pos.x + dir_x, y = ypos - self.fear_height, z = pos.z + dir_z})
	if free_fall then
		return true
	else
		local bnode = minetest_get_node(blocker)
		local danger = is_node_dangerous(self, bnode.name)
		if danger then
			return true
		else
			local def = minetest_registered_nodes[bnode.name]
			if def and def.walkable then
				return false
			end
		end
	end

	return false
end


-- copy the 'mob facing cliff_or_danger check' from above, and rework to avoid water
local is_at_water_danger = function(self)


	if not self.object:get_luaentity() then
		return false
	end
	local yaw = self.object:get_yaw()
	local dir_x = -math_sin(yaw) * (self.collisionbox[4] + 0.5)
	local dir_z = math_cos(yaw) * (self.collisionbox[4] + 0.5)
	local pos = self.object:get_pos()
	local ypos = pos.y + self.collisionbox[2] -- just above floor

	local free_fall, blocker = minetest_line_of_sight(
		{x = pos.x + dir_x, y = ypos, z = pos.z + dir_z},
		{x = pos.x + dir_x, y = ypos - 3, z = pos.z + dir_z})
	if free_fall then
		return true
	else
		local bnode = minetest_get_node(blocker)
		local waterdanger = is_node_waterhazard(self, bnode.name)
		if
			waterdanger and (is_node_waterhazard(self, self.standing_in) or is_node_waterhazard(self, self.standing_on)) then
			return false
		elseif waterdanger and (is_node_waterhazard(self, self.standing_in) or is_node_waterhazard(self, self.standing_on)) == false then
			return true
		else
			local def = minetest_registered_nodes[bnode.name]
			if def and def.walkable then
				return false
			end
		end
	end

	return false
end


-- get node but use fallback for nil or unknown
local node_ok = function(pos, fallback)

	fallback = fallback or mobs.fallback_node

	local node = minetest_get_node_or_nil(pos)

	if node and minetest_registered_nodes[node.name] then
		return node
	end

	return minetest_registered_nodes[fallback]
end


-- environmental damage (water, lava, fire, light etc.)
local do_env_damage = function(self)

	-- feed/tame text timer (so mob 'full' messages dont spam chat)
	if self.htimer > 0 then
		self.htimer = self.htimer - 1
	end

	-- reset nametag after showing health stats
	if self.htimer < 1 and self.nametag2 then

		self.nametag = self.nametag2
		self.nametag2 = nil

		update_tag(self)
	end

	local pos = self.object:get_pos()

	self.time_of_day = minetest.get_timeofday()

	-- remove mob if beyond map limits
	if not within_limits(pos, 0) then
		mcl_burning.extinguish(self.object)
		self.object:remove()
		return true
	end


	-- Deal light damage to mob, returns true if mob died
	local deal_light_damage = function(self, pos, damage)
		if not (mod_weather and (mcl_weather.rain.raining or mcl_weather.state == "snow") and mcl_weather.is_outdoor(pos)) then
			self.health = self.health - damage

			effect(pos, 5, "mcl_particles_smoke.png")

			if check_for_death(self, "light", {type = "light"}) then
				return true
			end
		end
	end

	-- Use get_node_light for Minetest version 5.3 where get_natural_light
	-- does not exist yet.
	local get_light = minetest_get_natural_light or minetest_get_node_light
	local sunlight = get_light(pos, self.time_of_day)

	-- bright light harms mob
	if self.light_damage ~= 0 and (sunlight or 0) > 12 then
		if deal_light_damage(self, pos, self.light_damage) then
			return true
		end
	end
	local _, dim = nil, "overworld"
	if mod_worlds then
		_, dim = mcl_worlds.y_to_layer(pos.y)
	end
	if (self.sunlight_damage ~= 0 or self.ignited_by_sunlight) and (sunlight or 0) >= minetest.LIGHT_MAX and dim == "overworld" then
		if self.ignited_by_sunlight then
			mcl_burning.set_on_fire(self.object, 10)
		else
			deal_light_damage(self, pos, self.sunlight_damage)
			return true
		end
	end

	local y_level = self.collisionbox[2]

	if self.child then
		y_level = self.collisionbox[2] * 0.5
	end

	-- what is mob standing in?
	pos.y = pos.y + y_level + 0.25 -- foot level
	local pos2 = {x=pos.x, y=pos.y-1, z=pos.z}
	self.standing_in = node_ok(pos, "air").name
	self.standing_on = node_ok(pos2, "air").name

	-- don't fall when on ignore, just stand still
	if self.standing_in == "ignore" then
		self.object:set_velocity({x = 0, y = 0, z = 0})
	end

	local nodef = minetest_registered_nodes[self.standing_in]

	-- rain
	if self.rain_damage > 0 and mod_weather then
		if mcl_weather.rain.raining and mcl_weather.is_outdoor(pos) then

			self.health = self.health - self.rain_damage

			if check_for_death(self, "rain", {type = "environment",
					pos = pos, node = self.standing_in}) then
				return true
			end
		end
	end

	pos.y = pos.y + 1 -- for particle effect position

	-- water damage
	if self.water_damage > 0
	and nodef.groups.water then

		if self.water_damage ~= 0 then

			self.health = self.health - self.water_damage

			effect(pos, 5, "mcl_particles_smoke.png", nil, nil, 1, nil)

			if check_for_death(self, "water", {type = "environment",
					pos = pos, node = self.standing_in}) then
				return true
			end
		end

	-- lava damage
	elseif self.lava_damage > 0
	and (nodef.groups.lava) then

		if self.lava_damage ~= 0 then

			self.health = self.health - self.lava_damage

			effect(pos, 5, "fire_basic_flame.png", nil, nil, 1, nil)

			if check_for_death(self, "lava", {type = "environment",
					pos = pos, node = self.standing_in}) then
				return true
			end
		end

	-- fire damage
	elseif self.fire_damage > 0
	and (nodef.groups.fire) then

		if self.fire_damage ~= 0 then

			self.health = self.health - self.fire_damage

			effect(pos, 5, "fire_basic_flame.png", nil, nil, 1, nil)

			if check_for_death(self, "fire", {type = "environment",
					pos = pos, node = self.standing_in}) then
				return true
			end
		end

	-- damage_per_second node check
	elseif nodef.damage_per_second ~= 0 and not nodef.groups.lava and not nodef.groups.fire then

		self.health = self.health - nodef.damage_per_second

		effect(pos, 5, "mcl_particles_smoke.png")

		if check_for_death(self, "dps", {type = "environment",
				pos = pos, node = self.standing_in}) then
			return true
		end
	end

	-- Drowning damage
	if self.breath_max ~= -1 then
		local drowning = false
		if self.breathes_in_water then
			if minetest_get_item_group(self.standing_in, "water") == 0 then
				drowning = true
			end
		elseif nodef.drowning > 0 then
			drowning = true
		end
		if drowning then

			self.breath = math_max(0, self.breath - 1)

			effect(pos, 2, "bubble.png", nil, nil, 1, nil)
			if self.breath <= 0 then
				local dmg
				if nodef.drowning > 0 then
					dmg = nodef.drowning
				else
					dmg = 4
				end
				damage_effect(self, dmg)
				self.health = self.health - dmg
			end
			if check_for_death(self, "drowning", {type = "environment",
					pos = pos, node = self.standing_in}) then
				return true
			end
		else
			self.breath = math_min(self.breath_max, self.breath + 1)
		end
	end

	--- suffocation inside solid node
	-- FIXME: Redundant with mcl_playerplus
	if (self.suffocation == true)
	and (nodef.walkable == nil or nodef.walkable == true)
	and (nodef.collision_box == nil or nodef.collision_box.type == "regular")
	and (nodef.node_box == nil or nodef.node_box.type == "regular")
	and (nodef.groups.disable_suffocation ~= 1)
	and (nodef.groups.opaque == 1) then

		-- Short grace period before starting to take suffocation damage.
		-- This is different from players, who take damage instantly.
		-- This has been done because mobs might briefly be inside solid nodes
		-- when e.g. climbing up stairs.
		-- This is a bit hacky because it assumes that do_env_damage
		-- is called roughly every second only.
		self.suffocation_timer = self.suffocation_timer + 1
		if self.suffocation_timer >= 3 then
			-- 2 damage per second
			-- TODO: Deal this damage once every 1/2 second
			self.health = self.health - 2

			if check_for_death(self, "suffocation", {type = "environment",
					pos = pos, node = self.standing_in}) then
				return true
			end
		end
	else
		self.suffocation_timer = 0
	end

	return check_for_death(self, "", {type = "unknown"})
end


-- jump if facing a solid node (not fences or gates)
local do_jump = function(self)

	if not self.jump
	or self.jump_height == 0
	or self.fly
	or (self.child and self.type ~= "monster")
	or self.order == "stand" then
		return false
	end

	self.facing_fence = false

	-- something stopping us while moving?
	if self.state ~= "stand"
	and get_velocity(self) > 0.5
	and self.object:get_velocity().y ~= 0 then
		return false
	end

	local pos = self.object:get_pos()
	local yaw = self.object:get_yaw()

	-- what is mob standing on?
	pos.y = pos.y + self.collisionbox[2] - 0.2

	local nod = node_ok(pos)

	if minetest_registered_nodes[nod.name].walkable == false then
		return false
	end

	-- where is front
	local dir_x = -math_sin(yaw) * (self.collisionbox[4] + 0.5)
	local dir_z = math_cos(yaw) * (self.collisionbox[4] + 0.5)

	-- what is in front of mob?
	nod = node_ok({
		x = pos.x + dir_x,
		y = pos.y + 0.5,
		z = pos.z + dir_z
	})

	-- this is used to detect if there's a block on top of the block in front of the mob.
	-- If there is, there is no point in jumping as we won't manage.
	local nodTop = node_ok({
		x = pos.x + dir_x,
		y = pos.y + 1.5,
		z = pos.z + dir_z
	}, "air")

	-- we don't attempt to jump if there's a stack of blocks blocking
	if minetest_registered_nodes[nodTop.name].walkable == true then
		return false
	end

	-- thin blocks that do not need to be jumped
	if nod.name == node_snow then
		return false
	end

	if self.walk_chance == 0
	or minetest_registered_items[nod.name].walkable then

		if minetest_get_item_group(nod.name, "fence") == 0
		and minetest_get_item_group(nod.name, "fence_gate") == 0
		and minetest_get_item_group(nod.name, "wall") == 0 then

			local v = self.object:get_velocity()

			v.y = self.jump_height

			set_animation(self, "jump") -- only when defined

			self.object:set_velocity(v)

			-- when in air move forward
			minetest_after(0.3, function(self, v)
				if (not self.object) or (not self.object:get_luaentity()) or (self.state == "die") then
					return
				end
				self.object:set_acceleration({
					x = v.x * 2,
					y = -10,
					z = v.z * 2,
				})
			end, self, v)

			if self.jump_sound_cooloff <= 0 then
				mob_sound(self, "jump")
				self.jump_sound_cooloff = 0.5
			end
		else
			self.facing_fence = true
		end

		-- if we jumped against a block/wall 4 times then turn
		if self.object:get_velocity().x ~= 0
		and self.object:get_velocity().z ~= 0 then

			self.jump_count = (self.jump_count or 0) + 1

			if self.jump_count == 4 then

				local yaw = self.object:get_yaw() or 0

				yaw = set_yaw(self, yaw + 1.35, 8)

				self.jump_count = 0
			end
		end

		return true
	end

	return false
end


-- blast damage to entities nearby
local entity_physics = function(pos, radius)

	radius = radius * 2

	local objs = minetest_get_objects_inside_radius(pos, radius)
	local obj_pos, dist

	for n = 1, #objs do

		obj_pos = objs[n]:get_pos()

		dist = vector.distance(pos, obj_pos)
		if dist < 1 then dist = 1 end

		local damage = math_floor((4 / dist) * radius)
		local ent = objs[n]:get_luaentity()

		-- punches work on entities AND players
		objs[n]:punch(objs[n], 1.0, {
			full_punch_interval = 1.0,
			damage_groups = {fleshy = damage},
		}, pos)
	end
end


-- should mob follow what I'm holding ?
local follow_holding = function(self, clicker)

	if mobs.invis[clicker:get_player_name()] then
		return false
	end

	local item = clicker:get_wielded_item()
	local t = type(self.follow)

	-- single item
	if t == "string"
	and item:get_name() == self.follow then
		return true

	-- multiple items
	elseif t == "table" then

		for no = 1, #self.follow do

			if self.follow[no] == item:get_name() then
				return true
			end
		end
	end

	return false
end


-- find two animals of same type and breed if nearby and horny
local breed = function(self)

	-- child takes a long time before growing into adult
	if self.child == true then

		-- When a child, hornytimer is used to count age until adulthood
		self.hornytimer = self.hornytimer + 1

		if self.hornytimer >= CHILD_GROW_TIME then

			self.child = false
			self.hornytimer = 0

			self.object:set_properties({
				textures = self.base_texture,
				mesh = self.base_mesh,
				visual_size = self.base_size,
				collisionbox = self.base_colbox,
				selectionbox = self.base_selbox,
			})

			-- custom function when child grows up
			if self.on_grown then
				self.on_grown(self)
			else
				-- jump when fully grown so as not to fall into ground
				self.object:set_velocity({
					x = 0,
					y = self.jump_height,
					z = 0
				})
			end
		end

		return
	end

	-- horny animal can mate for BREED_TIME seconds,
	-- afterwards horny animal cannot mate again for BREED_TIME_AGAIN seconds
	if self.horny == true
	and self.hornytimer < BREED_TIME + BREED_TIME_AGAIN then

		self.hornytimer = self.hornytimer + 1

		if self.hornytimer >= BREED_TIME + BREED_TIME_AGAIN then
			self.hornytimer = 0
			self.horny = false
		end
	end

	-- find another same animal who is also horny and mate if nearby
	if self.horny == true
	and self.hornytimer <= BREED_TIME then

		local pos = self.object:get_pos()

		effect({x = pos.x, y = pos.y + 1, z = pos.z}, 8, "heart.png", 3, 4, 1, 0.1)

		local objs = minetest_get_objects_inside_radius(pos, 3)
		local num = 0
		local ent = nil

		for n = 1, #objs do

			ent = objs[n]:get_luaentity()

			-- check for same animal with different colour
			local canmate = false

			if ent then

				if ent.name == self.name then
					canmate = true
				else
					local entname = string.split(ent.name,":")
					local selfname = string.split(self.name,":")

					if entname[1] == selfname[1] then
						entname = string.split(entname[2],"_")
						selfname = string.split(selfname[2],"_")

						if entname[1] == selfname[1] then
							canmate = true
						end
					end
				end
			end

			if ent
			and canmate == true
			and ent.horny == true
			and ent.hornytimer <= BREED_TIME then
				num = num + 1
			end

			-- found your mate? then have a baby
			if num > 1 then

				self.hornytimer = BREED_TIME + 1
				ent.hornytimer = BREED_TIME + 1

				-- spawn baby
				minetest_after(5, function(parent1, parent2, pos)
					if not parent1.object:get_luaentity() then
						return
					end
					if not parent2.object:get_luaentity() then
						return
					end

					-- Give XP
					if mod_experience then
						mcl_experience.throw_experience(pos, math_random(1, 7))
					end

					-- custom breed function
					if parent1.on_breed then
						-- when false, skip going any further
						if parent1.on_breed(parent1, parent2) == false then
							return
						end
					end

					local child = mobs:spawn_child(pos, parent1.name)

					local ent_c = child:get_luaentity()


					-- Use texture of one of the parents
					local p = math_random(1, 2)
					if p == 1 then
						ent_c.base_texture = parent1.base_texture
					else
						ent_c.base_texture = parent2.base_texture
					end
					child:set_properties({
						textures = ent_c.base_texture
					})

					-- tamed and owned by parents' owner
					ent_c.tamed = true
					ent_c.owner = parent1.owner
				end, self, ent, pos)

				num = 0

				break
			end
		end
	end
end


-- find and replace what mob is looking for (grass, wheat etc.)
local replace = function(self, pos)

	if not self.replace_rate
	or not self.replace_what
	or self.child == true
	or self.object:get_velocity().y ~= 0
	or math_random(1, self.replace_rate) > 1 then
		return
	end

	local what, with, y_offset

	if type(self.replace_what[1]) == "table" then

		local num = math_random(#self.replace_what)

		what = self.replace_what[num][1] or ""
		with = self.replace_what[num][2] or ""
		y_offset = self.replace_what[num][3] or 0
	else
		what = self.replace_what
		with = self.replace_with or ""
		y_offset = self.replace_offset or 0
	end

	pos.y = pos.y + y_offset

	local node = minetest_get_node(pos)
	if node.name == what then

		local oldnode = {name = what, param2 = node.param2}
		local newnode = {name = with, param2 = node.param2}
		local on_replace_return

		if self.on_replace then
			on_replace_return = self.on_replace(self, pos, oldnode, newnode)
		end

		if on_replace_return ~= false then

			if mobs_griefing then
				minetest_set_node(pos, newnode)
			end

		end
	end
end


-- check if daytime and also if mob is docile during daylight hours
local day_docile = function(self)

	if self.docile_by_day == false then

		return false

	elseif self.docile_by_day == true
	and self.time_of_day > 0.2
	and self.time_of_day < 0.8 then

		return true
	end
end




-- execute current state (stand, walk, run, attacks)
-- returns true if mob has died
local do_states = function(self, dtime)

	local yaw = self.object:get_yaw() or 0

	if self.state == "stand" then

		if math_random(1, 4) == 1 then

			local lp = nil
			local s = self.object:get_pos()
			local objs = minetest_get_objects_inside_radius(s, 3)

			for n = 1, #objs do

				if objs[n]:is_player() then
					lp = objs[n]:get_pos()
					break
				end
			end

			-- look at any players nearby, otherwise turn randomly
			if lp then

				local vec = {
					x = lp.x - s.x,
					z = lp.z - s.z
				}

				yaw = (atan(vec.z / vec.x) + math_pi / 2) - self.rotate

				if lp.x > s.x then yaw = yaw + math_pi end
			else
				yaw = yaw + math_random(-0.5, 0.5)
			end

			yaw = set_yaw(self, yaw, 8)
		end

		set_velocity(self, 0)
		set_animation(self, "stand")

		-- npc's ordered to stand stay standing
		if self.type ~= "npc"
		or self.order ~= "stand" then

			if self.walk_chance ~= 0
			and self.facing_fence ~= true
			and math_random(1, 100) <= self.walk_chance
			and is_at_cliff_or_danger(self) == false then

				set_velocity(self, self.walk_velocity)
				self.state = "walk"
				set_animation(self, "walk")
			end
		end

	elseif self.state == "walk" then

		local s = self.object:get_pos()
		local lp = nil

		-- is there something I need to avoid?
		if (self.water_damage > 0
		and self.lava_damage > 0)
		or self.breath_max ~= -1 then

			lp = minetest_find_node_near(s, 1, {"group:water", "group:lava"})

		elseif self.water_damage > 0 then

			lp = minetest_find_node_near(s, 1, {"group:water"})

		elseif self.lava_damage > 0 then

			lp = minetest_find_node_near(s, 1, {"group:lava"})

		elseif self.fire_damage > 0 then

			lp = minetest_find_node_near(s, 1, {"group:fire"})

		end

		local is_in_danger = false
		if lp then
			-- If mob in or on dangerous block, look for land
			if (is_node_dangerous(self, self.standing_in) or
				is_node_dangerous(self, self.standing_on)) or (is_node_waterhazard(self, self.standing_in) or is_node_waterhazard(self, self.standing_on)) and (not self.fly) then
				is_in_danger = true

					-- If mob in or on dangerous block, look for land
					if is_in_danger then
					-- Better way to find shore - copied from upstream
						lp = minetest_find_nodes_in_area_under_air(
							{x = s.x - 5, y = s.y - 0.5, z = s.z - 5},
							{x = s.x + 5, y = s.y + 1, z = s.z + 5},
							{"group:solid"})

						lp = #lp > 0 and lp[math_random(#lp)]

						-- did we find land?
						if lp then

							local vec = {
								x = lp.x - s.x,
								z = lp.z - s.z
							}

							yaw = (atan(vec.z / vec.x) + math_pi / 2) - self.rotate


							if lp.x > s.x  then yaw = yaw + math_pi end

							-- look towards land and move in that direction
							yaw = set_yaw(self, yaw, 6)
							set_velocity(self, self.walk_velocity)

						end
					end

			-- A danger is near but mob is not inside
			else

				-- Randomly turn
				if math_random(1, 100) <= 30 then
					yaw = yaw + math_random(-0.5, 0.5)
					yaw = set_yaw(self, yaw, 8)
				end
			end

			yaw = set_yaw(self, yaw, 8)

		-- otherwise randomly turn
		elseif math_random(1, 100) <= 30 then

			yaw = yaw + math_random(-0.5, 0.5)
			yaw = set_yaw(self, yaw, 8)
		end

		-- stand for great fall or danger or fence in front
		local cliff_or_danger = false
		if is_in_danger then
			cliff_or_danger = is_at_cliff_or_danger(self)
		end
		if self.facing_fence == true
		or cliff_or_danger
		or math_random(1, 100) <= 30 then

			set_velocity(self, 0)
			self.state = "stand"
			set_animation(self, "stand")
			local yaw = self.object:get_yaw() or 0
			yaw = set_yaw(self, yaw + 0.78, 8)
		else

			set_velocity(self, self.walk_velocity)

			if flight_check(self)
			and self.animation
			and self.animation.fly_start
			and self.animation.fly_end then
				set_animation(self, "fly")
			else
				set_animation(self, "walk")
			end
		end

	-- runaway when punched
	elseif self.state == "runaway" then

		self.runaway_timer = self.runaway_timer + 1

		-- stop after 5 seconds or when at cliff
		if self.runaway_timer > 5
		or is_at_cliff_or_danger(self) then
			self.runaway_timer = 0
			set_velocity(self, 0)
			self.state = "stand"
			set_animation(self, "stand")
			local yaw = self.object:get_yaw() or 0
			yaw = set_yaw(self, yaw + 0.78, 8)
		else
			set_velocity(self, self.run_velocity)
			set_animation(self, "run")
		end

	-- attack routines (explode, dogfight, shoot, dogshoot)
	elseif self.state == "attack" then

		local s = self.object:get_pos()
		local p = self.attack:get_pos() or s

		-- stop attacking if player invisible or out of range
		if not self.attack
		or not self.attack:get_pos()
		or not object_in_range(self, self.attack)
		or self.attack:get_hp() <= 0
		or (self.attack:is_player() and mobs.invis[ self.attack:get_player_name() ]) then

			self.state = "stand"
			set_velocity(self, 0)
			set_animation(self, "stand")
			self.attack = nil
			self.v_start = false
			self.timer = 0
			self.blinktimer = 0
			self.path.way = nil

			return
		end

		-- calculate distance from mob and enemy
		local dist = vector.distance(p, s)

		if self.attack_type == "explode" then

			local vec = {
				x = p.x - s.x,
				z = p.z - s.z
			}

			yaw = (atan(vec.z / vec.x) + math_pi / 2) - self.rotate

			if p.x > s.x then yaw = yaw + math_pi end

			yaw = set_yaw(self, yaw, 0, dtime)

			local node_break_radius = self.explosion_radius or 1
			local entity_damage_radius = self.explosion_damage_radius
					or (node_break_radius * 2)

			-- start timer when in reach and line of sight
			if not self.v_start
			and dist <= self.reach
			and line_of_sight(self, s, p, 2) then

				self.v_start = true
				self.timer = 0
				self.blinktimer = 0
				mob_sound(self, "fuse", nil, false)

			-- stop timer if out of reach or direct line of sight
			elseif self.allow_fuse_reset
			and self.v_start
			and (dist >= self.explosiontimer_reset_radius
					or not line_of_sight(self, s, p, 2)) then
				self.v_start = false
				self.timer = 0
				self.blinktimer = 0
				self.blinkstatus = false
				remove_texture_mod(self, "^[brighten")
			end

			-- walk right up to player unless the timer is active
			if self.v_start and (self.stop_to_explode or dist < self.reach) then
				set_velocity(self, 0)
			else
				set_velocity(self, self.run_velocity)
			end

			if self.animation and self.animation.run_start then
				set_animation(self, "run")
			else
				set_animation(self, "walk")
			end

			if self.v_start then

				self.timer = self.timer + dtime
				self.blinktimer = (self.blinktimer or 0) + dtime

				if self.blinktimer > 0.2 then

					self.blinktimer = 0

					if self.blinkstatus then
						remove_texture_mod(self, "^[brighten")
					else
						add_texture_mod(self, "^[brighten")
					end

					self.blinkstatus = not self.blinkstatus
				end

				if self.timer > self.explosion_timer then

					local pos = self.object:get_pos()

					if mod_explosions then
					if mobs_griefing and not minetest_is_protected(pos, "") then
						mcl_explosions.explode(mcl_util.get_object_center(self.object), self.explosion_strength, { drop_chance = 1.0 }, self.object)
					else
						minetest_sound_play(self.sounds.explode, {
							pos = pos,
							gain = 1.0,
							max_hear_distance = self.sounds.distance or 32
						}, true)

						entity_physics(pos, entity_damage_radius)
						effect(pos, 32, "mcl_particles_smoke.png", nil, nil, node_break_radius, 1, 0)
					end
					end
					mcl_burning.extinguish(self.object)
					self.object:remove()

					return true
				end
			end

		elseif self.attack_type == "dogfight"
		or (self.attack_type == "dogshoot" and dogswitch(self, dtime) == 2)
		or (self.attack_type == "dogshoot" and dist <= self.reach and dogswitch(self) == 0) then

			if self.fly
			and dist > self.reach then

				local p1 = s
				local me_y = math_floor(p1.y)
				local p2 = p
				local p_y = math_floor(p2.y + 1)
				local v = self.object:get_velocity()

				if flight_check(self, s) then

					if me_y < p_y then

						self.object:set_velocity({
							x = v.x,
							y = 1 * self.walk_velocity,
							z = v.z
						})

					elseif me_y > p_y then

						self.object:set_velocity({
							x = v.x,
							y = -1 * self.walk_velocity,
							z = v.z
						})
					end
				else
					if me_y < p_y then

						self.object:set_velocity({
							x = v.x,
							y = 0.01,
							z = v.z
						})

					elseif me_y > p_y then

						self.object:set_velocity({
							x = v.x,
							y = -0.01,
							z = v.z
						})
					end
				end

			end

			-- rnd: new movement direction
			if self.path.following
			and self.path.way
			and self.attack_type ~= "dogshoot" then

				-- no paths longer than 50
				if #self.path.way > 50
				or dist < self.reach then
					self.path.following = false
					return
				end

				local p1 = self.path.way[1]

				if not p1 then
					self.path.following = false
					return
				end

				if math_abs(p1.x-s.x) + math_abs(p1.z - s.z) < 0.6 then
					-- reached waypoint, remove it from queue
					table.remove(self.path.way, 1)
				end

				-- set new temporary target
				p = {x = p1.x, y = p1.y, z = p1.z}
			end

			local vec = {
				x = p.x - s.x,
				z = p.z - s.z
			}

			yaw = (atan(vec.z / vec.x) + math_pi / 2) - self.rotate

			if p.x > s.x then yaw = yaw + math_pi end

			yaw = set_yaw(self, yaw, 0, dtime)

			-- move towards enemy if beyond mob reach
			if dist > self.reach then

				-- path finding by rnd
				if self.pathfinding -- only if mob has pathfinding enabled
				and enable_pathfinding then

					smart_mobs(self, s, p, dist, dtime)
				end

				if is_at_cliff_or_danger(self) then

					set_velocity(self, 0)
					set_animation(self, "stand")
					local yaw = self.object:get_yaw() or 0
					yaw = set_yaw(self, yaw + 0.78, 8)
				else

					if self.path.stuck then
						set_velocity(self, self.walk_velocity)
					else
						set_velocity(self, self.run_velocity)
					end

					if self.animation and self.animation.run_start then
						set_animation(self, "run")
					else
						set_animation(self, "walk")
					end
				end

			else -- rnd: if inside reach range

				self.path.stuck = false
				self.path.stuck_timer = 0
				self.path.following = false -- not stuck anymore

				set_velocity(self, 0)

				if not self.custom_attack then

					if self.timer > 1 then

						self.timer = 0

						if self.double_melee_attack
						and math_random(1, 2) == 1 then
							set_animation(self, "punch2")
						else
							set_animation(self, "punch")
						end

						local p2 = p
						local s2 = s

						p2.y = p2.y + .5
						s2.y = s2.y + .5

						if line_of_sight(self, p2, s2) == true then

							-- play attack sound
							mob_sound(self, "attack")

							-- punch player (or what player is attached to)
							local attached = self.attack:get_attach()
							if attached then
								self.attack = attached
							end
							self.attack:punch(self.object, 1.0, {
								full_punch_interval = 1.0,
								damage_groups = {fleshy = self.damage}
							}, nil)
						end
					end
				else	-- call custom attack every second
					if self.custom_attack
					and self.timer > 1 then

						self.timer = 0

						self.custom_attack(self, p)
					end
				end
			end

		elseif self.attack_type == "shoot"
		or (self.attack_type == "dogshoot" and dogswitch(self, dtime) == 1)
		or (self.attack_type == "dogshoot" and dist > self.reach and dogswitch(self) == 0) then

			p.y = p.y - .5
			s.y = s.y + .5

			local dist = vector.distance(p, s)
			local vec = {
				x = p.x - s.x,
				y = p.y - s.y,
				z = p.z - s.z
			}

			yaw = (atan(vec.z / vec.x) + math_pi / 2) - self.rotate

			if p.x > s.x then yaw = yaw + math_pi end

			yaw = set_yaw(self, yaw, 0, dtime)

			set_velocity(self, 0)

			local p = self.object:get_pos()
			p.y = p.y + (self.collisionbox[2] + self.collisionbox[5]) / 2

			if self.shoot_interval
			and self.timer > self.shoot_interval
			and not minetest_raycast(p, self.attack:get_pos(), false, false):next()
			and math_random(1, 100) <= 60 then

				self.timer = 0
				set_animation(self, "shoot")

				-- play shoot attack sound
				mob_sound(self, "shoot_attack")

				-- Shoot arrow
				if minetest_registered_entities[self.arrow] then

					local arrow, ent
					local v = 1
					if not self.shoot_arrow then
						self.firing = true
						minetest_after(1, function()
							self.firing = false
						end)
						arrow = minetest_add_entity(p, self.arrow)
						ent = arrow:get_luaentity()
						if ent.velocity then
							v = ent.velocity
						end
						ent.switch = 1
						ent.owner_id = tostring(self.object) -- add unique owner id to arrow
					end

					local amount = (vec.x * vec.x + vec.y * vec.y + vec.z * vec.z) ^ 0.5
					-- offset makes shoot aim accurate
					vec.y = vec.y + self.shoot_offset
					vec.x = vec.x * (v / amount)
					vec.y = vec.y * (v / amount)
					vec.z = vec.z * (v / amount)
					if self.shoot_arrow then
						vec = vector.normalize(vec)
						self:shoot_arrow(p, vec)
					else
						arrow:set_velocity(vec)
					end
				end
			end
		end
	end
end

-- deal damage and effects when mob punched
local mob_punch = function(self, hitter, tflp, tool_capabilities, dir)

	-- custom punch function
	if self.do_punch then

		-- when false skip going any further
		if self.do_punch(self, hitter, tflp, tool_capabilities, dir) == false then
			return
		end
	end

	-- error checking when mod profiling is enabled
	if not tool_capabilities then
		minetest.log("warning", "[mobs] Mod profiling enabled, damage not enabled")
		return
	end

	local is_player = hitter:is_player()

	if is_player then
		-- is mob protected?
		if self.protected and minetest_is_protected(self.object:get_pos(), hitter:get_player_name()) then
			return
		end

		-- set/update 'drop xp' timestamp if hitted by player
		self.xp_timestamp = minetest_get_us_time()
	end


	-- punch interval
	local weapon = hitter:get_wielded_item()
	local punch_interval = 1.4

	-- exhaust attacker
	if mod_hunger and is_player then
		mcl_hunger.exhaust(hitter:get_player_name(), mcl_hunger.EXHAUST_ATTACK)
	end

	-- calculate mob damage
	local damage = 0
	local armor = self.object:get_armor_groups() or {}
	local tmp

	-- quick error check incase it ends up 0 (serialize.h check test)
	if tflp == 0 then
		tflp = 0.2
	end

	if use_cmi then
		damage = cmi.calculate_damage(self.object, hitter, tflp, tool_capabilities, dir)
	else

		for group,_ in pairs( (tool_capabilities.damage_groups or {}) ) do

			tmp = tflp / (tool_capabilities.full_punch_interval or 1.4)

			if tmp < 0 then
				tmp = 0.0
			elseif tmp > 1 then
				tmp = 1.0
			end

			damage = damage + (tool_capabilities.damage_groups[group] or 0)
				* tmp * ((armor[group] or 0) / 100.0)
		end
	end

	if weapon then
		local fire_aspect_level = mcl_enchanting.get_enchantment(weapon, "fire_aspect")
		if fire_aspect_level > 0 then
			mcl_burning.set_on_fire(self.object, fire_aspect_level * 4)
		end
	end

	-- check for tool immunity or special damage
	for n = 1, #self.immune_to do

		if self.immune_to[n][1] == weapon:get_name() then

			damage = self.immune_to[n][2] or 0
			break
		end
	end

	-- healing
	if damage <= -1 then
		self.health = self.health - math_floor(damage)
		return
	end

	if use_cmi then

		local cancel =  cmi.notify_punch(self.object, hitter, tflp, tool_capabilities, dir, damage)

		if cancel then return end
	end

	if tool_capabilities then
		punch_interval = tool_capabilities.full_punch_interval or 1.4
	end

	-- add weapon wear manually
	-- Required because we have custom health handling ("health" property)
	if minetest_is_creative_enabled("") ~= true
	and tool_capabilities then
		if tool_capabilities.punch_attack_uses then
			-- Without this delay, the wear does not work. Quite hacky ...
			minetest_after(0, function(name)
				local player = minetest.get_player_by_name(name)
				if not player then return end
				local weapon = hitter:get_wielded_item(player)
				local def = weapon:get_definition()
				if def.tool_capabilities and def.tool_capabilities.punch_attack_uses then
					local wear = math_floor(65535/tool_capabilities.punch_attack_uses)
					weapon:add_wear(wear)
					hitter:set_wielded_item(weapon)
				end
			end, hitter:get_player_name())
		end
	end

	local die = false

	-- only play hit sound and show blood effects if damage is 1 or over; lower to 0.1 to ensure armor works appropriately.
	if damage >= 0.1 then

		-- weapon sounds
		if weapon:get_definition().sounds ~= nil then

			local s = math_random(0, #weapon:get_definition().sounds)

			minetest_sound_play(weapon:get_definition().sounds[s], {
				object = self.object, --hitter,
				max_hear_distance = 8
			}, true)
		else
			minetest_sound_play("default_punch", {
				object = self.object,
				max_hear_distance = 5
			}, true)
		end

		damage_effect(self, damage)

		-- do damage
		self.health = self.health - damage

		-- skip future functions if dead, except alerting others
		if check_for_death(self, "hit", {type = "punch", puncher = hitter}) then
			die = true
		end

		-- knock back effect (only on full punch)
		if not die
		and self.knock_back
		and tflp >= punch_interval then

			local v = self.object:get_velocity()
			local r = 1.4 - math_min(punch_interval, 1.4)
			local kb = r * 2.0
			local up = 2

			-- if already in air then dont go up anymore when hit
			if v.y ~= 0
			or self.fly then
				up = 0
			end

			-- direction error check
			dir = dir or {x = 0, y = 0, z = 0}

			-- check if tool already has specific knockback value
			if tool_capabilities.damage_groups["knockback"] then
				kb = tool_capabilities.damage_groups["knockback"]
			else
				kb = kb * 1.5
			end


			local luaentity
			if hitter then
				luaentity = hitter:get_luaentity()
			end
			if hitter and is_player then
				local wielditem = hitter:get_wielded_item()
				kb = kb + 3 * mcl_enchanting.get_enchantment(wielditem, "knockback")
			elseif luaentity and luaentity._knockback then
				kb = kb + luaentity._knockback
			end

			self.object:set_velocity({
				x = dir.x * kb,
				y = dir.y * kb + up * 2,
				z = dir.z * kb
			})

			self.pause_timer = 0.25
		end
	end -- END if damage

	-- if skittish then run away
	if not die and self.runaway == true and self.state ~= "flop" then

		local lp = hitter:get_pos()
		local s = self.object:get_pos()
		local vec = {
			x = lp.x - s.x,
			y = lp.y - s.y,
			z = lp.z - s.z
		}

		local yaw = (atan(vec.z / vec.x) + 3 * math_pi / 2) - self.rotate

		if lp.x > s.x then
			yaw = yaw + math_pi
		end

		yaw = set_yaw(self, yaw, 6)
		self.state = "runaway"
		self.runaway_timer = 0
		self.following = nil
	end

	local name = hitter:get_player_name() or ""

	-- attack puncher and call other mobs for help
	if self.passive == false
	and self.state ~= "flop"
	and (self.child == false or self.type == "monster")
	and hitter:get_player_name() ~= self.owner
	and not mobs.invis[ name ] then

		if not die then
			-- attack whoever punched mob
			self.state = ""
			do_attack(self, hitter)
		end

		-- alert others to the attack
		local objs = minetest_get_objects_inside_radius(hitter:get_pos(), self.view_range)
		local obj = nil

		for n = 1, #objs do

			obj = objs[n]:get_luaentity()

			if obj then

				-- only alert members of same mob or friends
				if obj.group_attack
				and obj.state ~= "attack"
				and obj.owner ~= name then
					if obj.name == self.name then
						do_attack(obj, hitter)
					elseif type(obj.group_attack) == "table" then
						for i=1, #obj.group_attack do
							if obj.name == obj.group_attack[i] then
								do_attack(obj, hitter)
								break
							end
						end
					end
				end

				-- have owned mobs attack player threat
				if obj.owner == name and obj.owner_loyal then
					do_attack(obj, self.object)
				end
			end
		end
	end
end

local mob_detach_child = function(self, child)

	if self.driver == child then
		self.driver = nil
	end

end

-- get entity staticdata
local mob_staticdata = function(self)

--[[
	-- remove mob when out of range unless tamed
	if remove_far
	and self.can_despawn
	and self.remove_ok
	and ((not self.nametag) or (self.nametag == ""))
	and self.lifetimer <= 20 then

		minetest.log("action", "Mob "..name.." despawns in mob_staticdata at "..minetest.pos_to_string(self.object.get_pos(), 1))
		mcl_burning.extinguish(self.object)
		self.object:remove()

		return ""-- nil
	end
--]]
	self.remove_ok = true
	self.attack = nil
	self.following = nil
	self.state = "stand"

	if use_cmi then
		self.serialized_cmi_components = cmi.serialize_components(self._cmi_components)
	end

	local tmp = {}

	for _,stat in pairs(self) do

		local t = type(stat)

		if  t ~= "function"
		and t ~= "nil"
		and t ~= "userdata"
		and _ ~= "_cmi_components" then
			tmp[_] = self[_]
		end
	end

	return minetest.serialize(tmp)
end


-- activate mob and reload settings
local mob_activate = function(self, staticdata, def, dtime)

	-- remove monsters in peaceful mode
	if self.type == "monster"
	and minetest_settings:get_bool("only_peaceful_mobs", false) then
		mcl_burning.extinguish(self.object)
		self.object:remove()

		return
	end

	-- load entity variables
	local tmp = minetest.deserialize(staticdata)

	if tmp then
		for _,stat in pairs(tmp) do
			self[_] = stat
		end
	end

	-- select random texture, set model and size
	if not self.base_texture then

		-- compatiblity with old simple mobs textures
		if type(def.textures[1]) == "string" then
			def.textures = {def.textures}
		end

		self.base_texture = def.textures[math_random(1, #def.textures)]
		self.base_mesh = def.mesh
		self.base_size = self.visual_size
		self.base_colbox = self.collisionbox
		self.base_selbox = self.selectionbox
	end

	-- for current mobs that dont have this set
	if not self.base_selbox then
		self.base_selbox = self.selectionbox or self.base_colbox
	end

	-- set texture, model and size
	local textures = self.base_texture
	local mesh = self.base_mesh
	local vis_size = self.base_size
	local colbox = self.base_colbox
	local selbox = self.base_selbox

	-- specific texture if gotten
	if self.gotten == true
	and def.gotten_texture then
		textures = def.gotten_texture
	end

	-- specific mesh if gotten
	if self.gotten == true
	and def.gotten_mesh then
		mesh = def.gotten_mesh
	end

	-- set child objects to half size
	if self.child == true then

		vis_size = {
			x = self.base_size.x * .5,
			y = self.base_size.y * .5,
		}

		if def.child_texture then
			textures = def.child_texture[1]
		end

		colbox = {
			self.base_colbox[1] * .5,
			self.base_colbox[2] * .5,
			self.base_colbox[3] * .5,
			self.base_colbox[4] * .5,
			self.base_colbox[5] * .5,
			self.base_colbox[6] * .5
		}
		selbox = {
			self.base_selbox[1] * .5,
			self.base_selbox[2] * .5,
			self.base_selbox[3] * .5,
			self.base_selbox[4] * .5,
			self.base_selbox[5] * .5,
			self.base_selbox[6] * .5
		}
	end

	if self.health == 0 then
		self.health = math_random (self.hp_min, self.hp_max)
	end
	if self.breath == nil then
		self.breath = self.breath_max
	end

	-- pathfinding init
	self.path = {}
	self.path.way = {} -- path to follow, table of positions
	self.path.lastpos = {x = 0, y = 0, z = 0}
	self.path.stuck = false
	self.path.following = false -- currently following path?
	self.path.stuck_timer = 0 -- if stuck for too long search for path

	-- Armor groups
	-- immortal=1 because we use custom health
	-- handling (using "health" property)
	local armor
	if type(self.armor) == "table" then
		armor = table.copy(self.armor)
		armor.immortal = 1
	else
		armor = {immortal=1, fleshy = self.armor}
	end
	self.object:set_armor_groups(armor)
	self.old_y = self.object:get_pos().y
	self.old_health = self.health
	self.sounds.distance = self.sounds.distance or 10
	self.textures = textures
	self.mesh = mesh
	self.collisionbox = colbox
	self.selectionbox = selbox
	self.visual_size = vis_size
	self.standing_in = "ignore"
	self.standing_on = "ignore"
	self.jump_sound_cooloff = 0 -- used to prevent jump sound from being played too often in short time
	self.opinion_sound_cooloff = 0 -- used to prevent sound spam of particular sound types

	self.texture_mods = {}
	self.object:set_texture_mod("")

	self.v_start = false
	self.timer = 0
	self.blinktimer = 0
	self.blinkstatus = false

	-- check existing nametag
	if not self.nametag then
		self.nametag = def.nametag
	end

	-- set anything changed above
	self.object:set_properties(self)
	set_yaw(self, (math_random(0, 360) - 180) / 180 * math_pi, 6)
	update_tag(self)
	set_animation(self, "stand")

	-- run on_spawn function if found
	if self.on_spawn and not self.on_spawn_run then
		if self.on_spawn(self) then
			self.on_spawn_run = true --  if true, set flag to run once only
		end
	end

	-- run after_activate
	if def.after_activate then
		def.after_activate(self, staticdata, def, dtime)
	end

	if use_cmi then
		self._cmi_components = cmi.activate_components(self.serialized_cmi_components)
		cmi.notify_activate(self.object, dtime)
	end
end


local mob_step = function(self, dtime)

	if not self or not self.object or not self.object:get_luaentity() then
		return false
	end

	if self.state == "die" then
		print("need custom die stop moving thing")
		return
	end

	-- can mob be pushed, if so calculate direction -- do this first to prevent issues
	if self.pushable then
		collision(self)
	end




	--if not self.fire_resistant then
	--	mcl_burning.tick(self.object, dtime)
	--end

	--if use_cmi then
		--cmi.notify_step(self.object, dtime)
	--end

	local pos = self.object:get_pos()
	local yaw = 0

	--if mobs_debug then
		--update_tag(self)
	--end



	--if self.jump_sound_cooloff > 0 then
	--	self.jump_sound_cooloff = self.jump_sound_cooloff - dtime
	--end

	--if self.opinion_sound_cooloff > 0 then
	--	self.opinion_sound_cooloff = self.opinion_sound_cooloff - dtime
	--end

	--if falling(self, pos) then
		-- Return if mob died after falling
	--	return
	--end

	-- smooth rotation by ThomasMonroe314

	if self.delay and self.delay > 0 then

		local yaw = self.object:get_yaw() or 0

		if self.delay == 1 then
			yaw = self.target_yaw
		else
			local dif = math_abs(yaw - self.target_yaw)

			if yaw > self.target_yaw then

				if dif > math_pi then
					dif = 2 * math_pi - dif -- need to add
					yaw = yaw + dif / self.delay
				else
					yaw = yaw - dif / self.delay -- need to subtract
				end

			elseif yaw < self.target_yaw then

				if dif > math_pi then
					dif = 2 * math_pi - dif
					yaw = yaw - dif / self.delay -- need to subtract
				else
					yaw = yaw + dif / self.delay -- need to add
				end
			end

			if yaw > (math_pi * 2) then yaw = yaw - (math_pi * 2) end
			if yaw < 0 then yaw = yaw + (math_pi * 2) end
		end

		self.delay = self.delay - 1
		if self.shaking then
			yaw = yaw + (math_random() * 2 - 1) * 5 * dtime
		end
		self.object:set_yaw(yaw)
		update_roll(self)
	end

	-- end rotation

	-- run custom function (defined in mob lua file)
	--if self.do_custom then

		-- when false skip going any further
		--if self.do_custom(self, dtime) == false then
		--	return
		--end
	--end

	-- knockback timer
	--if self.pause_timer > 0 then

	--	self.pause_timer = self.pause_timer - dtime

	--	return
	--end

	-- attack timer
	--self.timer = self.timer + dtime

	--[[
	if self.state ~= "attack" then

		if self.timer < 1 then
			print("returning>>error code 1")
			return
		end

		self.timer = 0
	end
	]]--

	-- never go over 100
	--if self.timer > 100 then
	--	self.timer = 1
	--end

	-- mob plays random sound at times
	--if math_random(1, 70) == 1 then
	--	mob_sound(self, "random", true)
	--end

	-- environmental damage timer (every 1 second)
	--self.env_damage_timer = self.env_damage_timer + dtime

	--if (self.state == "attack" and self.env_damage_timer > 1)
	--or self.state ~= "attack" then
	--
	--	self.env_damage_timer = 0
	--
	--	-- check for environmental damage (water, fire, lava etc.)
	--	if do_env_damage(self) then
	--		return
	--	end
	--
		-- node replace check (cow eats grass etc.)
	--	replace(self, pos)
	--end

	--monster_attack(self)

	--npc_attack(self)

	--breed(self)

	--if do_states(self, dtime) then
	--	return
	--end

	--do_jump(self)

	--runaway_from(self)


	--if is_at_water_danger(self) and self.state ~= "attack" then
	--	if math_random(1, 10) <= 6 then
	--		set_velocity(self, 0)
	--		self.state = "stand"
	--		set_animation(self, "stand")
	--		yaw = yaw + math_random(-0.5, 0.5)
	--		yaw = set_yaw(self, yaw, 8)
	--	end
	--end

	
	-- Add water flowing for mobs from mcl_item_entity
	--[[
	local p, node, nn, def
	p = self.object:get_pos()
	node = minetest_get_node_or_nil(p)
	if node then
		nn = node.name
		def = minetest_registered_nodes[nnenable_physicss if not on/in flowing liquid
		self._flowing = false
		enable_physics(self.object, self, true)
		return
	end

	--Mob following code.
	follow_flop(self)


	if is_at_cliff_or_danger(self) then
			set_velocity(self, 0)
			self.state = "stand"
			set_animation(self, "stand")
			local yaw = self.object:get_yaw() or 0
			yaw = set_yaw(self, yaw + 0.78, 8)
	end

	-- Despawning: when lifetimer expires, remove mob
	if remove_far
	and self.can_despawn == true
	and ((not self.nametag) or (self.nametag == ""))
	and self.state ~= "attack"
	and self.following == nil then

		self.lifetimer = self.lifetimer - dtime
		if self.despawn_immediately or self.lifetimer <= 0 then
			minetest.log("action", "Mob "..self.name.." despawns in mob_step at "..minetest.pos_to_string(pos, 1))
			mcl_burning.extinguish(self.object)
			self.object:remove()
		elseif self.lifetimer <= 10 then
			if math_random(10) < 4 then
				self.despawn_immediately = true
			else
				self.lifetimer = 20
			end
		end
	end
	]]--
end


-- default function when mobs are blown up with TNT
local do_tnt = function(obj, damage)

	obj.object:punch(obj.object, 1.0, {
		full_punch_interval = 1.0,
		damage_groups = {fleshy = damage},
	}, nil)

	return false, true, {}
end


mobs.spawning_mobs = {}

-- Code to execute before custom on_rightclick handling
local on_rightclick_prefix = function(self, clicker)
	local item = clicker:get_wielded_item()

	-- Name mob with nametag
	if not self.ignores_nametag and item:get_name() == "mcl_mobs:nametag" then

		local tag = item:get_meta():get_string("name")
		if tag ~= "" then
			if string.len(tag) > MAX_MOB_NAME_LENGTH then
				tag = string.sub(tag, 1, MAX_MOB_NAME_LENGTH)
			end
			self.nametag = tag

			update_tag(self)

			if not mobs.is_creative(clicker:get_player_name()) then
				item:take_item()
				clicker:set_wielded_item(item)
			end
			return true
		end

	end
	return false
end

local create_mob_on_rightclick = function(on_rightclick)
	return function(self, clicker)
		local stop = on_rightclick_prefix(self, clicker)
		if (not stop) and (on_rightclick) then
			on_rightclick(self, clicker)
		end
	end
end

-- register mob entity
function mobs:register_mob(name, def)

	mobs.spawning_mobs[name] = true

local can_despawn
if def.can_despawn ~= nil then
	can_despawn = def.can_despawn
elseif def.spawn_class == "passive" then
	can_despawn = false
else
	can_despawn = true
end

local function scale_difficulty(value, default, min, special)
	if (not value) or (value == default) or (value == special) then
		return default
	else
		return math_max(min, value * difficulty)
	end
end

local collisionbox = def.collisionbox or {-0.25, -0.25, -0.25, 0.25, 0.25, 0.25}
-- Workaround for <https://github.com/minetest/minetest/issues/5966>:
-- Increase upper Y limit to avoid mobs glitching through solid nodes.
-- FIXME: Remove workaround if it's no longer needed.
if collisionbox[5] < 0.79 then
	collisionbox[5] = 0.79
end


























































minetest.register_entity(name, {

	use_texture_alpha = def.use_texture_alpha,
	stepheight = def.stepheight or 0.6,
	name = name,
	type = def.type,
	attack_type = def.attack_type,
	fly = def.fly,
	fly_in = def.fly_in or {"air", "__airlike"},
	owner = def.owner or "",
	order = def.order or "",
	on_die = def.on_die,
	spawn_small_alternative = def.spawn_small_alternative,
	do_custom = def.do_custom,
	jump_height = def.jump_height or 4, -- was 6
	rotate = math.rad(def.rotate or 0), --  0=front, 90=side, 180=back, 270=side2
	lifetimer = def.lifetimer or 57.73,
	hp_min = scale_difficulty(def.hp_min, 5, 1),
	hp_max = scale_difficulty(def.hp_max, 10, 1),
	xp_min = def.xp_min or 0,
	xp_max = def.xp_max or 0,
	xp_timestamp = 0,
	breath_max = def.breath_max or 15,
        breathes_in_water = def.breathes_in_water or false,
	physical = true,
	collisionbox = collisionbox,
	selectionbox = def.selectionbox or def.collisionbox,
	visual = def.visual,
	visual_size = def.visual_size or {x = 1, y = 1},
	mesh = def.mesh,
	makes_footstep_sound = def.makes_footstep_sound or false,
	view_range = def.view_range or 16,
	walk_velocity = def.walk_velocity or 1,
	run_velocity = def.run_velocity or 2,
	damage = scale_difficulty(def.damage, 0, 0),
	light_damage = def.light_damage or 0,
	sunlight_damage = def.sunlight_damage or 0,
	water_damage = def.water_damage or 0,
	lava_damage = def.lava_damage or 8,
	fire_damage = def.fire_damage or 1,
	suffocation = def.suffocation or true,
	fall_damage = def.fall_damage or 1,
	fall_speed = def.fall_speed or DEFAULT_FALL_SPEED, -- must be lower than -2
	drops = def.drops or {},
	armor = def.armor or 100,
	on_rightclick = create_mob_on_rightclick(def.on_rightclick),
	arrow = def.arrow,
	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,
	group_attack = def.group_attack or false,
	passive = def.passive or false,
	knock_back = def.knock_back ~= false,
	shoot_offset = def.shoot_offset or 0,
	floats = def.floats or 1, -- floats in water by default
	floats_on_lava = def.floats_on_lava or 0,
	replace_rate = def.replace_rate,
	replace_what = def.replace_what,
	replace_with = def.replace_with,
	replace_offset = def.replace_offset or 0,
	on_replace = def.on_replace,
	timer = 0,
	env_damage_timer = 0,
	tamed = false,
	pause_timer = 0,
	horny = false,
	hornytimer = 0,
	gotten = false,
	health = 0,
	reach = def.reach or 3,
	htimer = 0,
	texture_list = def.textures,
	child_texture = def.child_texture,
	docile_by_day = def.docile_by_day or false,
	time_of_day = 0.5,
	fear_height = def.fear_height or 0,
	runaway = def.runaway,
	runaway_timer = 0,
	pathfinding = def.pathfinding,
	immune_to = def.immune_to or {},
	explosion_radius = def.explosion_radius, -- LEGACY
	explosion_damage_radius = def.explosion_damage_radius, -- LEGACY
	explosiontimer_reset_radius = def.explosiontimer_reset_radius,
	explosion_timer = def.explosion_timer or 3,
	allow_fuse_reset = def.allow_fuse_reset ~= false,
	stop_to_explode = def.stop_to_explode ~= false,
	custom_attack = def.custom_attack,
	double_melee_attack = def.double_melee_attack,
	dogshoot_switch = def.dogshoot_switch,
	dogshoot_count = 0,
	dogshoot_count_max = def.dogshoot_count_max or 5,
	dogshoot_count2_max = def.dogshoot_count2_max or (def.dogshoot_count_max or 5),
	attack_animals = def.attack_animals or false,
	specific_attack = def.specific_attack,
	runaway_from = def.runaway_from,
	owner_loyal = def.owner_loyal,
	facing_fence = false,
	_cmi_is_mob = true,
	pushable = def.pushable or true,


	-- MCL2 extensions
	teleport = teleport,
	do_teleport = def.do_teleport,
	spawn_class = def.spawn_class,
	ignores_nametag = def.ignores_nametag or false,
	rain_damage = def.rain_damage or 0,
	glow = def.glow,
	can_despawn = can_despawn,
	child = def.child or false,
	texture_mods = {},
	shoot_arrow = def.shoot_arrow,
        sounds_child = def.sounds_child,
	explosion_strength = def.explosion_strength,
	suffocation_timer = 0,
	follow_velocity = def.follow_velocity or 2.4,
	instant_death = def.instant_death or false,
	fire_resistant = def.fire_resistant or false,
	fire_damage_resistant = def.fire_damage_resistant or false,
	ignited_by_sunlight = def.ignited_by_sunlight or false,
	-- End of MCL2 extensions

	on_spawn = def.on_spawn,

	on_blast = def.on_blast or do_tnt,

	on_step = mob_step,

	do_punch = def.do_punch,

	on_punch = mob_punch,

	on_breed = def.on_breed,

	on_grown = def.on_grown,

	on_detach_child = mob_detach_child,

	on_activate = function(self, staticdata, dtime)
		--this is a temporary hack so mobs stop
		--glitching and acting really weird with the
		--default built in engine collision detection
		self.object:set_properties({
			collide_with_objects = false,
		})
		self.object:set_acceleration(vector_new(0,-9.81, 0))
		return mob_activate(self, staticdata, def, dtime)
	end,

	get_staticdata = function(self)
		return mob_staticdata(self)
	end,

	harmed_by_heal = def.harmed_by_heal,

})

if minetest_get_modpath("doc_identifier") ~= nil then
	doc.sub.identifier.register_object(name, "basics", "mobs")
end

end -- END mobs:register_mob function


-- register arrow for shoot attack
function mobs:register_arrow(name, def)

	if not name or not def then return end -- errorcheck

	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,
		hit_mob = def.hit_mob,
		hit_object = def.hit_object,
		drop = def.drop or false, -- drops arrow as registered item when true
		collisionbox = {0, 0, 0, 0, 0, 0}, -- remove box around arrows
		timer = 0,
		switch = 0,
		owner_id = def.owner_id,
		rotate = def.rotate,
		on_punch = function(self)
			local vel = self.object:get_velocity()
			self.object:set_velocity({x=vel.x * -1, y=vel.y * -1, z=vel.z * -1})
			local pos = self.object:get_pos()

			if self.switch == 0
			or self.timer > 150
			or not within_limits(pos, 0) then
				mcl_burning.extinguish(self.object)
				self.object:remove();

				return
			end

			-- does arrow have a tail (fireball)
			if def.tail
			and def.tail == 1
			and def.tail_texture then

				minetest.add_particle({
					pos = pos,
					velocity = {x = 0, y = 0, z = 0},
					acceleration = {x = 0, y = 0, z = 0},
					expirationtime = def.expire or 0.25,
					collisiondetection = false,
					texture = def.tail_texture,
					size = def.tail_size or 5,
					glow = def.glow or 0,
				})
			end

			if self.hit_node then

				local node = node_ok(pos).name

				if minetest_registered_nodes[node].walkable then

					self.hit_node(self, pos, node)

					if self.drop == true then

						pos.y = pos.y + 1

						self.lastpos = (self.lastpos or pos)

						minetest_add_item(self.lastpos, self.object:get_luaentity().name)
					end

					self.object:remove();

					return
				end
			end

			if self.hit_player or self.hit_mob or self.hit_object then

				for _,player in pairs(minetest_get_objects_inside_radius(pos, 1.5)) do

					if self.hit_player
					and player:is_player() then

						self.hit_player(self, player)
						self.object:remove();
						return
					end

					local entity = player:get_luaentity()

					if entity
					and self.hit_mob
					and entity._cmi_is_mob == true
					and tostring(player) ~= self.owner_id
					and entity.name ~= self.object:get_luaentity().name then
						self.hit_mob(self, player)
						self.object:remove();
						return
					end

					if entity
					and self.hit_object
					and (not entity._cmi_is_mob)
					and tostring(player) ~= self.owner_id
					and entity.name ~= self.object:get_luaentity().name then
						self.hit_object(self, player)
						self.object:remove();
						return
					end
				end
			end

			self.lastpos = pos
		end
	})
end

-- Register spawn eggs

-- Note: This also introduces the “spawn_egg” group:
-- * spawn_egg=1: Spawn egg (generic mob, no metadata)
-- * spawn_egg=2: Spawn egg (captured/tamed mob, metadata)
function mobs:register_egg(mob, desc, background, addegg, no_creative)

	local grp = {spawn_egg = 1}

	-- do NOT add this egg to creative inventory (e.g. dungeon master)
	if no_creative == true then
		grp.not_in_creative_inventory = 1
	end

	local invimg = background

	if addegg == 1 then
		invimg = "mobs_chicken_egg.png^(" .. invimg ..
			"^[mask:mobs_chicken_egg_overlay.png)"
	end

	-- register old stackable mob egg
	minetest.register_craftitem(mob, {

		description = desc,
		inventory_image = invimg,
		groups = grp,

		_doc_items_longdesc = S("This allows you to place a single mob."),
		_doc_items_usagehelp = S("Just place it where you want the mob to appear. Animals will spawn tamed, unless you hold down the sneak key while placing. If you place this on a mob spawner, you change the mob it spawns."),

		on_place = function(itemstack, placer, pointed_thing)

			local pos = pointed_thing.above

			-- am I clicking on something with existing on_rightclick function?
			local under = minetest_get_node(pointed_thing.under)
			local def = minetest_registered_nodes[under.name]
			if def and def.on_rightclick then
				return def.on_rightclick(pointed_thing.under, under, placer, itemstack)
			end

			if pos
			and within_limits(pos, 0)
			and not minetest_is_protected(pos, placer:get_player_name()) then

				local name = placer:get_player_name()
				local privs = minetest.get_player_privs(name)
				if mod_mobspawners and under.name == "mcl_mobspawners:spawner" then
					if minetest_is_protected(pointed_thing.under, name) then
						minetest.record_protection_violation(pointed_thing.under, name)
						return itemstack
					end
					if not privs.maphack then
						minetest.chat_send_player(name, S("You need the “maphack” privilege to change the mob spawner."))
						return itemstack
					end
					mcl_mobspawners.setup_spawner(pointed_thing.under, itemstack:get_name())
					if not mobs.is_creative(name) then
						itemstack:take_item()
					end
					return itemstack
				end

				if not minetest_registered_entities[mob] then
					return itemstack
				end

				if minetest_settings:get_bool("only_peaceful_mobs", false)
						and minetest_registered_entities[mob].type == "monster" then
					minetest.chat_send_player(name, S("Only peaceful mobs allowed!"))
					return itemstack
				end

				pos.y = pos.y - 0.5

				local mob = minetest_add_entity(pos, mob)
				minetest.log("action", "Mob spawned: "..name.." at "..minetest.pos_to_string(pos))
				local ent = mob:get_luaentity()

				-- don't set owner if monster or sneak pressed
				if ent.type ~= "monster"
				and not placer:get_player_control().sneak then
					ent.owner = placer:get_player_name()
					ent.tamed = true
				end

				-- set nametag
				local nametag = itemstack:get_meta():get_string("name")
				if nametag ~= "" then
					if string.len(nametag) > MAX_MOB_NAME_LENGTH then
						nametag = string.sub(nametag, 1, MAX_MOB_NAME_LENGTH)
					end
					ent.nametag = nametag
					update_tag(ent)
				end

				-- if not in creative then take item
				if not mobs.is_creative(placer:get_player_name()) then
					itemstack:take_item()
				end
			end

			return itemstack
		end,
	})

end