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Versions: 21
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Contents
# frozen_string_literal: true
# Module for style guidelines.
module HeadMusic::Style::Guidelines; end
# A counterpoint guideline
class HeadMusic::Style::Guidelines::AvoidCrossingVoices < HeadMusic::Style::Annotation
MESSAGE = 'Avoid crossing voices. Maintain the high-low relationship between voices.'
def marks
crossings.map do |crossing|
HeadMusic::Style::Mark.for_all(crossing.notes)
end
end
private
def crossings
harmonic_intervals.select do |harmonic_interval|
harmonic_interval.pitch_orientation && harmonic_interval.pitch_orientation != predominant_pitch_orientation
end
end
def predominant_pitch_orientation
pitch_orientations.
compact.
group_by { |orientation| orientation }.
max { |a, b| a[1].length <=> b[1].length }.
first
end
def pitch_orientations
harmonic_intervals.map(&:pitch_orientation).compact.uniq
end
end
Version data entries
21 entries across 21 versions & 1 rubygems