def update(self, *args, **kwargs):
self._updateQuadGroupFromRect(self._frame)
#tick = kwargs["tick"]
quadgroup = SpriteFactory().quadgroup
if (self._last_frame != self._frame) and (quadgroup is not None):
for spr in quadgroup.sprites():
spr.rect.move_ip(self._dx + spr.position.left - spr.rect.left,
self._dy + spr.position.top - spr.rect.top)
spr.dirty = 1
quadgroup.dontSeekDirtiesNextTime()
self._last_frame = self._frame.copy()
