def smooth(actor, var, val, duration=1.0): global_play.add_action(Set(actor,var,val, duration=duration, func="smooth"))
def linear(actor, var, val, duration=1.0): global_play.add_action(Set(actor,var,val, duration=duration, func="linear"))
def wait(duration): global_play.add_action(Wait(duration))
def pause(): global_play.add_action(Pause())
def leave(*actors): global_play.add_action(Leave(*actors))
def enter(*actors): global_play.add_action(Enter(*actors))