Sha256: d9781d090a5406cefed4e3febfefe49d2de580a4011949b5703075bbec41e3f0
Contents?: true
Size: 825 Bytes
Versions: 9
Compression:
Stored size: 825 Bytes
Contents
# Module for style guidelines.
module HeadMusic::Style::Guidelines; end
# A melodic line should have direction changes.
class HeadMusic::Style::Guidelines::DirectionChanges < HeadMusic::Style::Annotation
def marks
return unless overage.positive?
penalty_exponent = overage**0.5
HeadMusic::Style::Mark.for_all(notes, fitness: HeadMusic::PENALTY_FACTOR**penalty_exponent)
end
private
def overage
return 0 if notes.length < 2
[notes_per_direction - self.class.maximum_notes_per_direction, 0].max
end
def notes_per_direction
notes.length.to_f / (melodic_intervals_changing_direction.length + 1)
end
def melodic_intervals_changing_direction
melodic_intervals.each_cons(2).reject do |interval_pair|
interval_pair[0].direction == interval_pair[1].direction
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems