--
mobs.create_data_handling_functions = function(def,mob_register)
    mob_register.get_staticdata = function(self)
        return minetest.serialize({
            --range = self.range,
            hp = self.hp,
            hunger = self.hunger,
            hostile = self.hostile,
            hostile_timer = self.hostile_timer,
            death_animation_timer = self.death_animation_timer,
            dead = self.dead
        })
    end


    mob_register.on_activate = function(self, staticdata, dtime_s)
        self.object:set_armor_groups({immortal = 1})
        --self.object:set_velocity({x = math.random(-5,5), y = 5, z = math.random(-5,5)})
        self.object:set_acceleration(def.gravity)
        if string.sub(staticdata, 1, string.len("return")) == "return" then
            local data = minetest.deserialize(staticdata)
            if data and type(data) == "table" then
                --self.range = data.range
                self.hp = data.hp
                self.hunger = data.hunger
                self.hostile = data.hostile
                self.hostile_timer = data.hostile_timer
                self.death_animation_timer = data.death_animation_timer
                self.dead = data.dead
            end
        end
        
        --set up mob
        self.object:set_animation(def.standing_frame, 0, 0, true)
        self.current_animation = 0
        self.object:set_hp(self.hp)
        self.direction = vector.new(math.random()*math.random(-1,1),0,math.random()*math.random(-1,1))
        
        
        --set the head up
        if def.has_head == true then
            local head = minetest.add_entity(self.object:get_pos(), "mob:head"..def.mobname)
            if head then
                self.child = head
                self.child:get_luaentity().parent = self.object
                self.child:set_attach(self.object, "", self.head_mount, vector.new(0,0,0))
                self.head_rotation = vector.new(0,0,0)
                self.child:set_animation({x=90,y=90}, 15, 0, true)
            end
        end
        self.is_mob = true
        self.object:set_armor_groups({immortal = 1})
        --self.object:set_yaw(math.pi*math.random(-1,1)*math.random())
    end

    --this is the info on the mob
    mob_register.debug_nametag = function(self,dtime)
        --we're doing this to the child because the nametage breaks the
        --animation on the mob's body
        if self.child then
            --we add in items we want to see in this list
            local debug_items = {"hostile_timer","hostile"}
            local text = ""
            for _,item in pairs(debug_items) do
                if self[item] ~= nil then
                    text = text..item..": "..tostring(self[item]).."\n"
                end
            end
            self.child:set_nametag_attributes({
            color = "white",
            text = text
            })
        end
    end
    return(mob_register)
end