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n3x on 08/15/07


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danigm
taboularasa


class TimedFrameAnimation(Sprite)

Published in: Python 

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  1. def __init__(self, frames, time):
  2.     """frames stores tuples (duration in ms, image-surf)"""
  3.     self.start_time = time
  4.     # personally, i would define the frames tuples the other way around and
  5.     # just turn this around:
  6.     durations, self.frame_list = zip(*frames)
  7.     # next line does the same as
  8.     # reduce(lambda l, v: l + [v + l[-1]], durations[1:], [durations[0]]) ;->
  9.     self.frame_end_time = [sum(durations[:i + 1]) for i in xrange(len(durations))]
  10.     self.run_time = self.frame_end_time[-1]
  11.     self.image = self.frame_list[0][1]
  12.     self.rect = self.image.get_rect()
  13.  
  14. def update(self, time):
  15.     play_position = (time - self.start_time) % self.run_time
  16.     # the above doesn't really work with a pausing feature, but you could
  17.     # remember the pause time, and when you unpause, recompute the start_time
  18.     for i, f in enumerate(self.frame_end_time):
  19.         if play_position <= f:
  20.             break
  21.     self.image = self.frame_list[i]
  22.     self.rect = self.image.get_rect()

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