vanilla get source position code

function action_sound2d:get_source_positions ()
    local actor = db.actor
    local dir = actor:direction ()
    dir.y = 0.0
    local dir_left = vector_rotate_y (dir, 45)
    local dir_right = vector_rotate_y (dir, -45)
    dir_left:normalize ()
    dir_right:normalize ()
       --ðàññ÷èòàåì âûñîòó
    local pos = actor:position ()
    pos.y = pos.y + 1.5   --íó íèçêîðîñëûé ó íàñ àêòåð...
    local pos_l = pos;
    return pos_l:add (dir_left:mul (1.5)), pos:add (dir_right:mul (1.5))
end