Sha256: 232832e6605add5823ca30ac3015a780de1dace6d96656751be2121f5ed59ad4
Contents?: true
Size: 1.18 KB
Versions: 3
Compression:
Stored size: 1.18 KB
Contents
class HeadMusic::PitchClass attr_reader :number PREFERRED_SPELLINGS = %w[C C# D Eb E F F# G Ab A Bb B] SHARP_SPELLINGS = %w[C C# D D# E F F# G G# A A# B] FLAT_SPELLINGS = %w[C Db D Eb E F Gb G Ab A Bb B] def self.get(identifier) @pitch_classes ||= {} number = Spelling.get(identifier).pitch_class.to_i if Spelling.match(identifier) number ||= identifier.to_i % 12 @pitch_classes[number] ||= new(number) end singleton_class.send(:alias_method, :[], :get) class << self alias_method :[], :get end def initialize(pitch_class_or_midi_number) @number = pitch_class_or_midi_number.to_i % 12 end def to_i number end def +(semitones) HeadMusic::PitchClass.get(to_i + semitones.to_i) end def -(semitones) HeadMusic::PitchClass.get(to_i - semitones.to_i) end def ==(value) to_i == value.to_i end alias_method :enharmonic?, :== def intervals_to(other) delta = other.to_i - to_i inverse = delta > 0 ? delta - 12 : delta + 12 [delta, inverse].sort_by(&:abs).map { |interval| HeadMusic::Interval.get(interval) } end def smallest_interval_to(other) intervals_to(other).first end private_class_method :new end
Version data entries
3 entries across 3 versions & 1 rubygems
Version | Path |
---|---|
head_music-0.6.0 | lib/head_music/pitch_class.rb |
head_music-0.5.4 | lib/head_music/pitch_class.rb |
head_music-0.5.3 | lib/head_music/pitch_class.rb |