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annotate light8/Cue.py @ 46:cfb00e8cc0ea
(22:36:03) drewp: plaese use stronger quotes """ on Cue:1 to help my highlighter
| author | dmcc |
|---|---|
| date | Sun, 07 Jul 2002 13:37:04 +0000 |
| parents | 62c47c3a90cb |
| children | 71489bb71528 |
| rev | line source |
|---|---|
|
46
cfb00e8cc0ea
(22:36:03) drewp: plaese use stronger quotes """ on Cue:1 to help my highlighter
dmcc
parents:
45
diff
changeset
|
1 """And that's my cue to exit(0)...""" |
| 0 | 2 from time import time |
| 45 | 3 from util import subsetdict |
| 0 | 4 |
| 5 class Cue: | |
|
46
cfb00e8cc0ea
(22:36:03) drewp: plaese use stronger quotes """ on Cue:1 to help my highlighter
dmcc
parents:
45
diff
changeset
|
6 """Cues are groups of fades. They can tell you the current levels at a |
| 0 | 7 given time. They contain Fades, which are actually children of Cue, |
| 8 meaning that Cues can contain Cues. This is similar to the Light9 concept | |
|
46
cfb00e8cc0ea
(22:36:03) drewp: plaese use stronger quotes """ on Cue:1 to help my highlighter
dmcc
parents:
45
diff
changeset
|
9 of Cues and Fades, but without all the Nodes.""" |
| 45 | 10 def __init__(self, name, starttime, endtime, *fades): |
| 0 | 11 'Create a cue' |
| 12 self.name = name | |
| 13 self.starttime = starttime | |
| 14 self.endtime = endtime | |
| 15 self.fades = fades | |
| 16 self.cuestart = None | |
| 17 self.init_levels = None | |
| 18 def channels_involved(self): | |
| 19 'Return which channels are involved. This is important for marking.' | |
| 20 c = {} | |
| 21 for fade in self.fades: | |
| 22 for f_chan in fade.channels_involved(): | |
| 23 c[f_chan] = 1 | |
| 24 return c.keys() | |
| 25 def start(self, levels, time): | |
| 26 'Mark the beginning of a cue' | |
| 27 self.init_levels = levels | |
| 28 self.init_time = time | |
| 29 | |
| 30 for fade in self.fades: | |
| 31 subdict = subsetdict(levels, fade.channels_involved()) | |
| 32 fade.start(subdict, time) | |
| 33 def get_levels(self, curtime): | |
| 34 'Returns the current levels' | |
| 35 d = {} | |
| 36 for fade in self.fades: | |
| 37 fade_d = fade.get_levels(curtime) | |
| 38 for ch, lev in fade_d.items(): | |
| 39 d[ch] = max(lev, d.get(ch, 0)) | |
| 40 return d | |
| 41 | |
| 42 class Fade(Cue): | |
| 43 'See Cue.__doc__' | |
| 45 | 44 def __init__(self, channel, starttime, endtime=None, endlevel=0, dur=None, |
| 45 param=None): | |
| 46 'Only specify an end time or a duration' | |
| 47 if not endtime: | |
| 48 endtime = starttime + dur | |
| 49 else: | |
| 50 dur = endtime - starttime | |
| 51 Cue.__init__(self, "%s -> %f" % (channel, endlevel), starttime, endtime) | |
| 0 | 52 self.channel = channel |
| 53 self.endlevel = endlevel | |
| 54 self.dur = dur | |
| 55 self.param = param | |
| 56 def start(self, levels, time): | |
| 57 'Mark the beginning of the fade' | |
| 58 self.init_levels = levels | |
| 59 self.init_level = levels[self.channel] | |
| 60 self.init_time = time | |
| 61 def channels_involved(self): | |
| 62 'Speaks for itself, I hope' | |
| 63 return [self.channel] | |
| 64 def get_levels(self, curtime): | |
| 65 elapsed = curtime - self.init_time | |
| 66 if elapsed <= self.starttime: | |
| 67 return self.init_levels | |
| 68 elif elapsed >= self.endtime: | |
| 69 return {self.channel : self.endlevel} | |
| 70 else: | |
| 45 | 71 percent = float(elapsed) / self.dur |
| 0 | 72 return {self.channel : self.init_level + |
| 73 percent * (self.endlevel - self.init_level)} | |
| 74 | |
| 75 if __name__ == '__main__': | |
| 76 f1 = Fade('red', 0, 2, 100) | |
| 77 f2 = Fade('green', 1, 3, 50) | |
| 78 f3 = Fade('blue', 0, 4, 0) | |
| 79 f4 = Fade('clear', 0, 8, 75) | |
| 80 c = Cue("Color shift", 0, 10, f1, f2, f3, f4) | |
| 81 tstart = time() | |
| 82 # note how green is not mentioned -- it goes to 0 | |
| 83 c.start({'red' : 0, 'blue' : 100, 'clear' : 25}, tstart) | |
| 84 while time() - tstart < 15: | |
| 85 curtime = time() | |
| 86 levs = c.get_levels(curtime) | |
| 87 s = '\t'.join(["%s: %d" % (k[0], v) for k, v, in levs.items()]) | |
| 88 print "%.1f" % (curtime - tstart), s |