sprite.py 文件源码

def __init__(self, *sprites, **kwargs):
        """initialize group.

        pygame.sprite.LayeredDirty(*spites, **kwargs): return LayeredDirty

        You can specify some additional attributes through kwargs:
            _use_update: True/False   (default is False)
            _default_layer: default layer where the sprites without a layer are
                added
            _time_threshold: treshold time for switching between dirty rect
                mode and fullscreen mode; defaults to updating at 80 frames per
                second, which is equal to 1000.0 / 80.0

        """
        LayeredUpdates.__init__(self, *sprites, **kwargs)
        self._clip = None

        self._use_update = False

        self._time_threshold = 1000.0 / 80.0 # 1000.0 / fps

        self._bgd = None
        for key, val in kwargs.items():
            if key in ['_use_update', '_time_threshold', '_default_layer']:
                if hasattr(self, key):
                    setattr(self, key, val)