Class: Stave::Theory::Circle

Inherits:
Object
  • Object
show all
Defined in:
lib/stave/theory/circle.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(type:, root:) ⇒ Circle

Returns a new instance of Circle.



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# File 'lib/stave/theory/circle.rb', line 6

def initialize(type:, root:)
  @type = type
  @root = root
end

Instance Attribute Details

#root ⇒ Object (readonly)

Returns the value of attribute root.



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# File 'lib/stave/theory/circle.rb', line 4

def root
  @root
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/stave/theory/circle.rb', line 4

def type
  @type
end

Instance Method Details

#key_signatures ⇒ Object 



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# File 'lib/stave/theory/circle.rb', line 17

def key_signatures
  notes.map { |root| Scale.major_from(root).key_signature }
end

#notes ⇒ Object 



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# File 'lib/stave/theory/circle.rb', line 11

def notes
  7.times.inject([root]) do |notes, _|
    notes + [notes.last + type.step]
  end
end