khodowany
23 lines
873 B
Python
23 lines
873 B
Python
"""Source-derived ending geometry, independent of instrument composition."""
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import copy
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import fractions
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import generator.model
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BARS = 3
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def template(source):
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result = copy.deepcopy(source[-1])
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# An ending is three full bars in the final active meter, never a pickup.
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for change in result.get('attributes', []):
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for key in ('meter', 'key', 'clef', 'transpose', 'staff_details'):
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if key in change:
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result[key] = copy.deepcopy(change[key])
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result.update(duration=generator.model.rational(generator.model.meter_length(result['meter'])), implicit=False,
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attributes=[], harmonies=[], voices=[], tempos=[], section_label='')
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result['time_signature'] = generator.model.meter_label(result['meter'])
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return result
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def duration(source):
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return BARS * generator.model.fraction(template(source)['duration']) if source else fractions.Fraction()
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