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annotate light8/Cue.py @ 51:71489bb71528
- Meet Fader. He is going to grow up and be a crossfader some day
- Meet Fader. He is going to grow up and be a crossfader some day
(tomarrow)
- Tkinter -> Tix so we can use ScrolledListBox which has a command
- Some improvements to Cue
- Cues need to specify their final values
- Cues are imported by subs. This should be fixed for style points.
- Some other cleanups
| author | dmcc |
|---|---|
| date | Sun, 07 Jul 2002 15:40:45 +0000 |
| parents | cfb00e8cc0ea |
| children | 032b2b67bc10 |
| rev | line source |
|---|---|
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46
cfb00e8cc0ea
(22:36:03) drewp: plaese use stronger quotes """ on Cue:1 to help my highlighter
dmcc
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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: | |
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46
cfb00e8cc0ea
(22:36:03) drewp: plaese use stronger quotes """ on Cue:1 to help my highlighter
dmcc
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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 | |
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cfb00e8cc0ea
(22:36:03) drewp: plaese use stronger quotes """ on Cue:1 to help my highlighter
dmcc
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9 of Cues and Fades, but without all the Nodes.""" |
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- Meet Fader. He is going to grow up and be a crossfader some day
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10 def __init__(self, name, starttime, endtime=None, dur=None, *fades): |
| 0 | 11 'Create a cue' |
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- Meet Fader. He is going to grow up and be a crossfader some day
dmcc
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12 if not endtime: |
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13 endtime = starttime + dur |
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71489bb71528
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dmcc
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14 else: |
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15 dur = endtime - starttime |
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16 |
| 0 | 17 self.name = name |
| 18 self.starttime = starttime | |
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19 self.dur = dur |
| 0 | 20 self.endtime = endtime |
| 21 self.fades = fades | |
| 22 self.cuestart = None | |
| 23 self.init_levels = None | |
| 24 def channels_involved(self): | |
| 25 'Return which channels are involved. This is important for marking.' | |
| 26 c = {} | |
| 27 for fade in self.fades: | |
| 28 for f_chan in fade.channels_involved(): | |
| 29 c[f_chan] = 1 | |
| 30 return c.keys() | |
| 31 def start(self, levels, time): | |
| 32 'Mark the beginning of a cue' | |
| 33 self.init_levels = levels | |
| 34 self.init_time = time | |
| 35 | |
| 36 for fade in self.fades: | |
| 37 subdict = subsetdict(levels, fade.channels_involved()) | |
| 38 fade.start(subdict, time) | |
| 39 def get_levels(self, curtime): | |
| 40 'Returns the current levels' | |
| 41 d = {} | |
| 42 for fade in self.fades: | |
| 43 fade_d = fade.get_levels(curtime) | |
| 44 for ch, lev in fade_d.items(): | |
| 45 d[ch] = max(lev, d.get(ch, 0)) | |
| 46 return d | |
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47 def get_end_levels(self): |
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48 'Returns the final levels' |
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49 d = {} |
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50 for fade in self.fades: |
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51 fade_d = fade.get_end_levels() |
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dmcc
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52 for ch, lev in fade_d.items(): |
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53 d[ch] = max(lev, d.get(ch, 0)) |
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54 return d |
| 0 | 55 |
| 56 class Fade(Cue): | |
| 57 'See Cue.__doc__' | |
| 45 | 58 def __init__(self, channel, starttime, endtime=None, endlevel=0, dur=None, |
| 59 param=None): | |
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dmcc
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60 'Fades are simple Cues' |
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61 Cue.__init__(self, "%s -> %f" % (channel, endlevel), starttime, endtime, |
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62 dur) |
| 0 | 63 self.channel = channel |
| 64 self.endlevel = endlevel | |
| 65 self.dur = dur | |
| 66 self.param = param | |
| 67 def start(self, levels, time): | |
| 68 'Mark the beginning of the fade' | |
| 69 self.init_levels = levels | |
| 70 self.init_level = levels[self.channel] | |
| 71 self.init_time = time | |
| 72 def channels_involved(self): | |
| 73 'Speaks for itself, I hope' | |
| 74 return [self.channel] | |
| 75 def get_levels(self, curtime): | |
| 76 elapsed = curtime - self.init_time | |
| 77 if elapsed <= self.starttime: | |
| 78 return self.init_levels | |
| 79 elif elapsed >= self.endtime: | |
| 80 return {self.channel : self.endlevel} | |
| 81 else: | |
| 45 | 82 percent = float(elapsed) / self.dur |
| 0 | 83 return {self.channel : self.init_level + |
| 84 percent * (self.endlevel - self.init_level)} | |
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- Meet Fader. He is going to grow up and be a crossfader some day
dmcc
parents:
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85 def get_end_levels(self): |
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- Meet Fader. He is going to grow up and be a crossfader some day
dmcc
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86 return {self.channel : self.endlevel} |
| 0 | 87 |
| 88 if __name__ == '__main__': | |
| 89 f1 = Fade('red', 0, 2, 100) | |
| 90 f2 = Fade('green', 1, 3, 50) | |
| 91 f3 = Fade('blue', 0, 4, 0) | |
| 92 f4 = Fade('clear', 0, 8, 75) | |
| 93 c = Cue("Color shift", 0, 10, f1, f2, f3, f4) | |
| 94 tstart = time() | |
| 95 # note how green is not mentioned -- it goes to 0 | |
| 96 c.start({'red' : 0, 'blue' : 100, 'clear' : 25}, tstart) | |
| 97 while time() - tstart < 15: | |
| 98 curtime = time() | |
| 99 levs = c.get_levels(curtime) | |
| 100 s = '\t'.join(["%s: %d" % (k[0], v) for k, v, in levs.items()]) | |
| 101 print "%.1f" % (curtime - tstart), s |