function clear_arena(actor, npc, p)
local id, release_object, distance
local arena_zone = db.zone_by_name[p[1]]
for id = 1, 65535 do
release_object = alife():object(id)
if release_object and arena_zone then
if arena_zone:inside(release_object.position) then
if IsStalker(release_object) and not release_object:alive() then
alife():release(release_object, true)
elseif IsMonster(release_object) and not release_object:alive() then
alife():release(release_object, true)
end
end
end
end
end

function spawn_object_with_direction(actor, obj, p)
  --' p[1] - секция кого спаунить
  --' p[2] - имя патрульного пути где спаунить.
  --' p[3] - direction_x в радианах
  --' p[4] - direction_y в радианах
  --' p[5] - direction_z в радианах
    local spawn_sect = p[1]
    if spawn_sect == nil then
  abort("Wrong spawn section for 'spawn_object_with_direction' function %s. For object %s", tostring(spawn_sect), obj:name())
    end

    local path_name = p[2]
    if path_name == nil then
  abort("Wrong path_name for 'spawn_object_with_direction' function %s. For object %s", tostring(path_name), obj:name())
    end

    if not level.patrol_path_exists(path_name) then
  abort("Path %s doesnt exist. Function 'spawn_object_with_direction' for object %s ", tostring(path_name), obj:name())
    end

    local ptr = patrol(path_name)
    local direction_x = tonumber(p[3]) or 0
    local direction_y = tonumber(p[4]) or 0
    local direction_z = tonumber(p[5]) or 0

    local se_obj = alife():create(spawn_sect,
       ptr:point(0),
       ptr:level_vertex_id(0),
       ptr:game_vertex_id(0))
    se_obj.angle = vector():set(direction_x, direction_y, direction_z)
end