Contents

# frozen_string_literal: true

# Module for style guidelines.
module HeadMusic::Style::Guidelines; end

# A counterpoint guideline
class HeadMusic::Style::Guidelines::StepDownToFinalNote < HeadMusic::Style::Annotation
  MESSAGE = 'Step down to the final note.'

  def marks
    return if last_melodic_interval.nil?
    fitness = 1
    fitness *= HeadMusic::PENALTY_FACTOR unless step?
    fitness *= HeadMusic::PENALTY_FACTOR unless descending?
    HeadMusic::Style::Mark.for_all(notes[-2..-1], fitness: fitness) if fitness < 1
  end

  private

  def descending?
    last_melodic_interval&.descending?
  end

  def step?
    last_melodic_interval&.step?
  end

  def last_melodic_interval
    @last_melodic_interval ||= melodic_intervals.last
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
head_music-0.20.0	lib/head_music/style/guidelines/step_down_to_final_note.rb
head_music-0.19.2	lib/head_music/style/guidelines/step_down_to_final_note.rb
head_music-0.19.1	lib/head_music/style/guidelines/step_down_to_final_note.rb