Sha256: 3e5331c98b8ced8558969f282cdd61475d3c96f74cf8cbdb904489713eb1cdd2
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Size: 856 Bytes
Versions: 27
Compression:
Stored size: 856 Bytes
Contents
# frozen_string_literal: true
# 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
27 entries across 27 versions & 1 rubygems