Class: HeadMusic::Style::Guidelines::OneToOne

Inherits:
Annotation
  • Object
show all
Defined in:
lib/head_music/style/guidelines/one_to_one.rb

Overview

A counterpoint guideline

Constant Summary collapse

MESSAGE = 
"Place a note for each note in the other voice."

Instance Method Summary collapse

Constructor Details

This class inherits a constructor from HeadMusic::Style::Annotation

Instance Method Details

#marks ⇒ Object 



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# File 'lib/head_music/style/guidelines/one_to_one.rb', line 8

def marks
  return unless cantus_firmus&.notes
  return if cantus_firmus.notes.empty?

  HeadMusic::Style::Mark.for_each(
    notes_without_match(voice, cantus_firmus) + notes_without_match(cantus_firmus, voice)
  )
end

#notes_without_match(voice1, voice2) ⇒ Object (private) 



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# File 'lib/head_music/style/guidelines/one_to_one.rb', line 19

def notes_without_match(voice1, voice2)
  voice1.notes.reject do |voice1_note|
    voice2.notes.map(&:position).include?(voice1_note.position)
  end
end