Class: HeadMusic::Style::Guidelines::StepDownToFinalNote

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

Overview

A counterpoint guideline

Constant Summary collapse

MESSAGE = 
"Step down to the final note."

Instance Method Summary collapse

Constructor Details

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

Instance Method Details

#descending? ⇒ Boolean (private)

Returns:

  • (Boolean) 


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

def descending?
  last_melodic_interval&.descending?
end

#last_melodic_interval ⇒ Object (private) 



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# File 'lib/head_music/style/guidelines/step_down_to_final_note.rb', line 27

def last_melodic_interval
  @last_melodic_interval ||= melodic_intervals.last
end

#marks ⇒ Object 



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

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..], fitness: fitness) if fitness < 1
end

#step? ⇒ Boolean (private)

Returns:

  • (Boolean) 


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# File 'lib/head_music/style/guidelines/step_down_to_final_note.rb', line 23

def step?
  last_melodic_interval&.step?
end