Sha256: 6ca46f8c1449f3973f22cfb0ef814e9dd09c56badeccecb59b3d6dc035ed4c46
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Size: 928 Bytes
Versions: 18
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Stored size: 928 Bytes
Contents
# frozen_string_literal: true
# Module for style guidelines.
module HeadMusic::Style::Guidelines; end
# A counterpoint guideline
class HeadMusic::Style::Guidelines::StepOutOfUnison < HeadMusic::Style::Annotation
MESSAGE = 'Exit a unison by step.'
def marks
leaps_following_unisons.map do |skip|
HeadMusic::Style::Mark.for_all(skip.notes)
end.flatten
end
private
def leaps_following_unisons
melodic_intervals_following_unisons.select(&:leap?)
end
def melodic_intervals_following_unisons
@melodic_intervals_following_unisons ||=
perfect_unisons.map do |unison|
note1 = voice.note_at(unison.position)
note2 = voice.note_following(unison.position)
HeadMusic::MelodicInterval.new(note1, note2) if note1 && note2
end.compact
end
def perfect_unisons
@perfect_unisons ||= harmonic_intervals.select(&:perfect_consonance?).select(&:unison?)
end
end
Version data entries
18 entries across 18 versions & 1 rubygems