adaptive-ai/helper_mobs.lua

local helper = adaptive_ai.helper

local chat_log = function(s)
    --minetest.chat_send_player("singleplayer", s)
end

adaptive_ai.chat_log = chat_log

local function get_node_group(name, group)
    if type(group) == "table" then
        local check = false
        for _,g in ipairs(group) do
            check = check or get_node_group(name, g)
        end
        return check
    else
        if not minetest.registered_nodes[name] or not minetest.registered_nodes[name].groups[group] then
            return nil
        end
        return minetest.registered_nodes[name].groups[group]
    end
end

local function is_airlike(name, airlike_groups)
    airlike_groups = airlike_groups or {}
    if name == "air" then return true end

    return get_node_group(name, airlike_groups)
end

local function search_surface(pos, airlike_groups)
    local top = minetest.get_node_or_nil(pos)
    if not top then return nil end

    local top_pos = {x=pos.x, y=pos.y, z=pos.z}
    top = minetest.get_node_or_nil(top_pos)
    --chat_log("Found "..top.name.."...")

    if not is_airlike(top.name) then
        repeat
            top_pos.y = top_pos.y + 1
            top = minetest.get_node_or_nil(top_pos)
            --chat_log("Going up - found "..top.name.."...")
        until not top or is_airlike(top.name)
        top_pos = not top and nil or top_pos
    else
        repeat
            top_pos.y = top_pos.y - 1
            top = minetest.get_node(top_pos)
            --chat_log("Going down - found "..top.name.."...")
        until not top or not is_airlike(top.name)
        top_pos = not top and nil or top_pos

        top_pos.y = top_pos.y + 1
    end
    --chat_log("Found!")

    return top_pos
end

helper.get_node_group = get_node_group
helper.search_surface = search_surface

----------------------------------------------
-- Auxiliar functions copied from mobs_redo --
----------------------------------------------

-- Localize math functions
local pi = math.pi
local square = math.sqrt
local sin = math.sin
local cos = math.cos
local abs = math.abs
local min = math.min
local max = math.max
local atann = math.atan
local floor = math.floor
local random = math.random
local atan = function(x)
	if not x or x ~= x then
		--error("atan bassed NaN")
		return 0
	else
		return atann(x)
	end
end

-- config values
local show_health = minetest.settings:get_bool("mob_show_health") ~= false
local use_cmi = minetest.global_exists("cmi")
local mobs_drop_items = minetest.settings:get_bool("mobs_drop_items") ~= false
local mobs_griefing = minetest.settings:get_bool("mobs_griefing") ~= false

-- default nodes
local node_fire = "fire:basic_flame"
local node_permanent_flame = "fire:permanent_flame"
local node_ice = "default:ice"
local node_snowblock = "default:snowblock"
local node_snow = "default:snow"

helper.mobs = {}

local get_distance = function(a, b)
	local x, y, z = a.x - b.x, a.y - b.y, a.z - b.z
	return square(x * x + y * y + z * z)
end

local set_animation = function(ent, anim)
    mobs:set_animation(ent,anim)
end

local mob_sound = function(ent, sound)
	if sound then
		minetest.sound_play(sound, {
			object = ent.object,
			gain = 1.0,
			max_hear_distance = ent.sounds.distance
		})
	end
end

local set_velocity = function(ent, v)
	-- do not move if mob has stopped
	if ent.state == "stand" then
		ent.object:setvelocity({x = 0, y = 0, z = 0})
		return
	end

	local yaw = (ent.object:get_yaw() or 0) + ent.rotate
	ent.object:setvelocity({
		x = sin(yaw) * -v,
		y = ent.object:getvelocity().y,
		z = cos(yaw) * v
	})
end

local get_velocity = function(ent)
	local v = ent.object:getvelocity()
	return (v.x * v.x + v.z * v.z) ^ 0.5
end

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

local set_yaw = function(ent, yaw, delay)
	mobs:yaw(ent, yaw, delay)
	return ent.target_yaw
end

local do_jump = function(self)
	if not self.jump
	or self.jump_height == 0
	or self.fly
	or self.child
	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:getvelocity().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 = -sin(yaw) * (self.collisionbox[4] + 0.5)
	local dir_z = cos(yaw) * (self.collisionbox[4] + 0.5)

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

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

	if minetest.registered_items[nod.name].walkable then
		if not nod.name:find("fence")
		and not nod.name:find("gate") then
			local v = self.object:getvelocity()
			v.y = self.jump_height
			set_animation(self, "jump") -- only when defined
			self.object:setvelocity(v)

			-- when in air move forward
			minetest.after(0.3, function(self, v)
				if self.object:get_luaentity() then
					self.object:set_acceleration({
						x = v.x * 2,--1.5,
						y = 0,
						z = v.z * 2,--1.5
					})
				end
			end, self, v)

			if get_velocity(self) > 0 then
				mob_sound(self, self.sounds.jump)
			end
		else
			self.facing_fence = true
		end
		return true
	end
	return false
end

local is_at_cliff = function(ent)
	if ent.fear_height == 0 then -- 0 for no falling protection!
		return false
	end

	local yaw = ent.object:get_yaw()
	local dir_x = -sin(yaw) * (ent.collisionbox[4] + 0.5)
	local dir_z = cos(yaw) * (ent.collisionbox[4] + 0.5)
	local pos = ent.object:get_pos()
	local ypos = pos.y + ent.collisionbox[2] -- just above floor

	if minetest.line_of_sight(
		{x = pos.x + dir_x, y = ypos, z = pos.z + dir_z},
		{x = pos.x + dir_x, y = ypos - ent.fear_height, z = pos.z + dir_z}
	, 1) then
		return true
	end
	return false
end

local within_limits = function(pos, radius)
	if  (pos.x - radius) > -30913
	and (pos.x + radius) <  30928
	and (pos.y - radius) > -30913
	and (pos.y + radius) <  30928
	and (pos.z - radius) > -30913
	and (pos.z + radius) <  30928 then
		return true -- within limits
	end

	return false -- beyond limits
end

-- update nametag colour
local update_tag = function(ent)
	local col = "#00FF00"
	local qua = ent.hp_max / 4

    if ent.health <= floor(qua) then
		col = "#FF0000"
    elseif ent.health <= floor(qua * 2) then
		col = "#FF6600"
    elseif ent.health <= floor(qua * 3) then
		col = "#FFFF00"
    end

	ent.object:set_properties({nametag = ent.nametag, nametag_color = col})
end

-- check line of sight (BrunoMine)
local line_of_sight = function(ent, pos1, pos2, stepsize)

	stepsize = stepsize or 1

	local s, pos = minetest.line_of_sight(pos1, pos2, stepsize)

	-- normal walking and flying mobs can see you through air
	if s == true then
		return true
	end

	-- New pos1 to be analyzed
	local npos1 = {x = pos1.x, y = pos1.y, z = pos1.z}

	local r, pos = minetest.line_of_sight(npos1, pos2, stepsize)

	-- Checks the return
	if r == true then return true end

	-- Nodename found
	local nn = minetest.get_node(pos).name

	-- Target Distance (td) to travel
	local td = get_distance(pos1, pos2)

	-- Actual Distance (ad) traveled
	local ad = 0

	-- It continues to advance in the line of sight in search of a real
	-- obstruction which counts as 'normal' nodebox.
	while minetest.registered_nodes[nn]
	and (minetest.registered_nodes[nn].walkable == false
	or minetest.registered_nodes[nn].drawtype == "nodebox") do

		-- Check if you can still move forward
		if td < ad + stepsize then
			return true -- Reached the target
		end

		-- Moves the analyzed pos
		local d = get_distance(pos1, pos2)

		npos1.x = ((pos2.x - pos1.x) / d * stepsize) + pos1.x
		npos1.y = ((pos2.y - pos1.y) / d * stepsize) + pos1.y
		npos1.z = ((pos2.z - pos1.z) / d * stepsize) + pos1.z

		-- NaN checks
		if d == 0
		or npos1.x ~= npos1.x
		or npos1.y ~= npos1.y
		or npos1.z ~= npos1.z then
			return false
		end

		ad = ad + stepsize

		-- scan again
		r, pos = minetest.line_of_sight(npos1, pos2, stepsize)

		if r == true then return true end

		-- New Nodename found
		nn = minetest.get_node(pos).name

	end

	return false
end

-- are we flying in what we are suppose to? (taikedz)
local flight_check = function(ent, pos_w)
	local nod = ent.standing_in
	local def = minetest.registered_nodes[nod]

	if not def then return false end -- nil check

	if type(ent.fly_in) == "string"
	and nod == ent.fly_in then
		return true
	elseif type(ent.fly_in) == "table" then
		for _,fly_in in pairs(ent.fly_in) do
			if nod == fly_in then
				return true
			end
		end
	end

	-- stops mobs getting stuck inside stairs and plantlike nodes
	if def.drawtype ~= "airlike"
	and def.drawtype ~= "liquid"
	and def.drawtype ~= "flowingliquid" then
		return true
	end

	return false
end

local effect = function(pos, amount, texture, min_size, max_size, radius, gravity, glow)
	radius = radius or 2
	min_size = min_size or 0.5
	max_size = max_size or 1
	gravity = gravity or -10
	glow = glow or 0

	minetest.add_particlespawner({
		amount = amount,
		time = 0.25,
		minpos = pos,
		maxpos = pos,
		minvel = {x = -radius, y = -radius, z = -radius},
		maxvel = {x = radius, y = radius, z = radius},
		minacc = {x = 0, y = gravity, z = 0},
		maxacc = {x = 0, y = gravity, z = 0},
		minexptime = 0.1,
		maxexptime = 1,
		minsize = min_size,
		maxsize = max_size,
		texture = texture,
		glow = glow,
	})
end

-- drop items
local item_drop = function(ent, cooked)
	-- no drops if disabled by setting
	if not mobs_drop_items then return end

	-- no drops for child mobs
	if ent.child then return end

	local obj, item, num
	local pos = ent.object:get_pos()
	ent.drops = ent.drops or {} -- nil check

	for n = 1, #ent.drops do
		if random(1, ent.drops[n].chance) == 1 then
			num = random(ent.drops[n].min or 1, ent.drops[n].max or 1)
			item = ent.drops[n].name

			-- cook items when true
			if cooked then
				local output = minetest.get_craft_result({
					method = "cooking", width = 1, items = {item}})

				if output and output.item and not output.item:is_empty() then
					item = output.item:get_name()
				end
			end

			-- add item if it exists
			obj = minetest.add_item(pos, ItemStack(item .. " " .. num))

			if obj and obj:get_luaentity() then
				obj:setvelocity({
					x = random(-10, 10) / 9,
					y = 6,
					z = random(-10, 10) / 9,
				})
			elseif obj then
				obj:remove() -- item does not exist
			end
		end
	end

	ent.drops = {}
end


-- check if mob is dead or only hurt
local check_for_death = function(ent, cause, cmi_cause)
	-- has health actually changed?
	if ent.health == ent.old_health and ent.health > 0 then
		return
	end

	ent.old_health = ent.health
	-- still got some health? play hurt sound
	if ent.health > 0 then
		mob_sound(ent, ent.sounds.damage)
		-- make sure health isn't higher than max
		if ent.health > ent.hp_max then
			ent.health = ent.hp_max
		end

		-- backup nametag so we can show health stats
		if not ent.nametag2 then
			ent.nametag2 = ent.nametag or ""
		end

		if show_health and (cmi_cause and cmi_cause.type == "punch") then
			ent.htimer = 2
			ent.nametag = "♥ " .. ent.health .. " / " .. ent.hp_max
			update_tag(ent)
		end

		return false
	end

	-- dropped cooked item if mob died in lava
	if cause == "lava" then
		item_drop(ent, true)
	else
		item_drop(ent, nil)
	end

	mob_sound(ent, ent.sounds.death)
	local pos = ent.object:get_pos()

	-- execute custom death function
	if ent.on_die then
		ent.on_die(ent, pos)

		if use_cmi then
			cmi.notify_die(ent.object, cmi_cause)
		end

		ent.object:remove()

		return true
	end

	-- default death function and die animation (if defined)
	if ent.animation and ent.animation.die_start and ent.animation.die_end then
		local frames = ent.animation.die_end - ent.animation.die_start
		local speed = ent.animation.die_speed or 15
		local length = max(frames / speed, 0)

		ent.attack = nil
		ent.v_start = false
		ent.timer = 0
		ent.blinktimer = 0
		ent.passive = true
		ent.state = "die"
		set_velocity(ent, 0)
		set_animation(ent, "die")

		minetest.after(length, function(ent)
			if use_cmi then
				cmi.notify_die(ent.object, cmi_cause)
			end

			ent.object:remove()
		end, ent)
	else
		if use_cmi then
			cmi.notify_die(ent.object, cmi_cause)
		end

		ent.object:remove()
	end

	effect(pos, 20, "tnt_smoke.png")
	return true
end

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

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

		ent.nametag = ent.nametag2
		ent.nametag2 = nil

		update_tag(ent)
	end

	local pos = ent.object:get_pos()
	ent.time_of_day = minetest.get_timeofday()

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

	-- bright light harms mob
	if ent.light_damage ~= 0
--	and pos.y > 0
--	and ent.time_of_day > 0.2
--	and ent.time_of_day < 0.8
	and (minetest.get_node_light(pos) or 0) > 12 then
		ent.health = ent.health - ent.light_damage
		effect(pos, 5, "tnt_smoke.png")
		if check_for_death(ent, "light", {type = "light"}) then return end
	end

	local y_level = ent.collisionbox[2]

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

	-- what is mob standing in?
	pos.y = pos.y + y_level + 0.25 -- foot level
	ent.standing_in = node_ok(pos, "air").name
--	print ("standing in " .. ent.standing_in)

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

	local nodef = minetest.registered_nodes[ent.standing_in]
	pos.y = pos.y + 1 -- for particle effect position
	-- water
	if ent.water_damage and nodef.groups.water then
		if ent.water_damage ~= 0 then
			ent.health = ent.health - ent.water_damage
			effect(pos, 5, "bubble.png", nil, nil, 1, nil)
			if check_for_death(ent, "water", {type = "environment",
					pos = pos, node = ent.standing_in}) then return end
		end

	-- lava or fire
	elseif ent.lava_damage
	and (nodef.groups.lava
	or ent.standing_in == node_fire
	or ent.standing_in == node_permanent_flame) then
		if ent.lava_damage ~= 0 then
			ent.health = ent.health - ent.lava_damage
			effect(pos, 5, "fire_basic_flame.png", nil, nil, 1, nil)
			if check_for_death(ent, "lava", {type = "environment",
					pos = pos, node = ent.standing_in}) then return end
		end

	-- damage_per_second node check
	elseif nodef.damage_per_second ~= 0 then
		ent.health = ent.health - nodef.damage_per_second
		effect(pos, 5, "tnt_smoke.png")
		if check_for_death(ent, "dps", {type = "environment",
				pos = pos, node = ent.standing_in}) then return end
	end
	check_for_death(ent, "", {type = "unknown"})
end

-- find and replace what mob is looking for (grass, wheat etc.)
local replace = function(ent, pos)
	if not mobs_griefing
	or not ent.replace_rate
	or not ent.replace_what
	or ent.child == true
	or ent.object:getvelocity().y ~= 0
	or random(1, ent.replace_rate) > 1 then
		return
	end

	local what, with, y_offset
	if type(ent.replace_what[1]) == "table" then
		local num = random(#ent.replace_what)
		what = ent.replace_what[num][1] or ""
		with = ent.replace_what[num][2] or ""
		y_offset = ent.replace_what[num][3] or 0
	else
		what = ent.replace_what
		with = ent.replace_with or ""
		y_offset = ent.replace_offset or 0
	end

	pos.y = pos.y + y_offset
	if #minetest.find_nodes_in_area(pos, pos, what) > 0 then
		local oldnode = {name = what}
		local newnode = {name = with}
		local on_replace_return

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

		if on_replace_return ~= false then
			minetest.set_node(pos, {name = with})

			-- when cow/sheep eats grass, replace wool and milk
			if ent.gotten == true then
				ent.gotten = false
				ent.object:set_properties(ent)
			end
		end
	end
end

-- specific runaway
local specific_runaway = function(list, what)

	-- no list so do not run
	if list == nil then
		return false
	end

	-- found entity on list to attack?
	for no = 1, #list do

		if list[no] == what then
			return true
		end
	end

	return false
end

-- find someone to runaway from
local runaway_from = function(ent)

	if not ent.runaway_from then
		return
	end

	local s = ent.object:get_pos()
	local p, sp, dist
	local player, obj, min_player
	local type, name = "", ""
	local min_dist = ent.view_range + 1
	local objs = minetest.get_objects_inside_radius(s, ent.view_range)

	for n = 1, #objs do

		if objs[n]:is_player() then

			if mobs.invis[ objs[n]:get_player_name() ]
			or ent.owner == objs[n]:get_player_name() then

				type = ""
			else
				player = objs[n]
				type = "player"
				name = "player"
			end
		else
			obj = objs[n]:get_luaentity()

			if obj then
				player = obj.object
				type = obj.type
				name = obj.name or ""
			end
		end

		-- find specific mob to runaway from
		if name ~= "" and name ~= ent.name
		and specific_runaway(ent.runaway_from, name) then

			p = player:get_pos()
			sp = s

			-- aim higher to make looking up hills more realistic
			p.y = p.y + 1
			sp.y = sp.y + 1

			dist = get_distance(p, s)


			-- choose closest player/mpb to runaway from
			if dist < min_dist
			and line_of_sight(ent, sp, p, 2) == true then
				min_dist = dist
				min_player = player
			end
		end
	end

	if min_player then

		local lp = player: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 * pi / 2) - ent.rotate

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

		yaw = set_yaw(ent, yaw, 4)
		ent.state = "runaway"
		ent.runaway_timer = 3
	end
end

local flop = function(ent)
	-- swimmers flop when out of their element, and swim again when back in
	if ent.fly then
		local s = ent.object:get_pos()
		if not flight_check(ent, s) then

			ent.state = "flop"
			ent.object:setvelocity({x = 0, y = -5, z = 0})

			set_animation(ent, "stand")

			return
		elseif ent.state == "flop" then
			ent.state = "stand"
		end
	end
end

local do_stand = function(ent, dtime)
    local yaw = self.object:get_yaw() or 0

    if random(1, 4) == 1 then
        local lp = nil
        local s = ent.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) + pi / 2) - ent.rotate
            if lp.x > s.x then yaw = yaw + pi end
        else
            yaw = yaw + random(-0.5, 0.5)
        end
        yaw = set_yaw(ent, yaw, 8)
    end

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

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

        if ent.walk_chance ~= 0
        and ent.facing_fence ~= true
        and random(1, 100) <= ent.walk_chance
        and is_at_cliff(ent) == false then

            set_velocity(ent, ent.walk_velocity)
            ent.state = "walk"
            set_animation(ent, "walk")

            --[[ fly up/down randomly for flying mobs
            if ent.fly and random(1, 100) <= ent.walk_chance then

                local v = ent.object:getvelocity()
                local ud = random(-1, 2) / 9

                ent.object:setvelocity({x = v.x, y = ud, z = v.z})
            end--]]
        end
    end
end

local do_walk = function(ent, dtime)
    local yaw = self.object:get_yaw() or 0

    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 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"})
    end

    if lp then
        -- if mob in water or lava then look for land
        if (self.lava_damage
            and minetest.registered_nodes[self.standing_in].groups.lava)
        or (self.water_damage
            and minetest.registered_nodes[self.standing_in].groups.water) then

            lp = minetest.find_node_near(s, 5, {"group:soil", "group:stone",
                "group:sand", node_ice, node_snowblock})

            -- 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) + pi / 2) - self.rotate

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

                -- look towards land and jump/move in that direction
                yaw = set_yaw(self, yaw, 6)
                do_jump(self)
                set_velocity(self, self.walk_velocity)
            else
                yaw = yaw + random(-0.5, 0.5)
            end
        else
            local vec = {
                x = lp.x - s.x,
                z = lp.z - s.z
            }

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

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

        yaw = set_yaw(self, yaw, 8)

    -- otherwise randomly turn
    elseif random(1, 100) <= 30 then
        yaw = yaw + random(-0.5, 0.5)
        yaw = set_yaw(self, yaw, 8)
    end

    -- stand for great fall in front
    local temp_is_cliff = is_at_cliff(self)

    if self.facing_fence == true
    or temp_is_cliff
    or random(1, 100) <= 30 then
        set_velocity(self, 0)
        self.state = "stand"
        set_animation(self, "stand")
    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
end

-- Config values
helper.mobs.show_health = show_health
helper.mobs.use_cmi = use_cmi
helper.mobs.mobs_griefing = mobs_griefing

-- Auxiliar functions
helper.mobs.get_distance = get_distance
helper.mobs.set_animation = set_animation
helper.mobs.mob_sound = mob_sound
helper.mobs.node_ok = node_ok
helper.mobs.set_velocity = set_velocity
helper.mobs.get_velocity = get_velocity
helper.mobs.is_at_cliff = is_at_cliff
helper.mobs.within_limits = within_limits
helper.mobs.update_tag = update_tag
helper.mobs.flight_check = flight_check
helper.mobs.effect = effect
helper.mobs.item_drop = item_drop
helper.mobs.check_for_death = check_for_death
helper.mobs.do_env_damage = do_env_damage
helper.mobs.replace = replace
helper.mobs.flop = flop
helper.mobs.runaway_from = runaway_from
helper.mobs.do_jump = do_jump
helper.mobs.set_yaw = set_yaw
helper.mobs.do_state_stand = do_state_stand
helper.mobs.update_tag = update_tag

adaptive_ai.helper = helper