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Size: 915 Bytes
Versions: 5
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Stored size: 915 Bytes
Contents
module Music
module Performance
class GlissandoConverter
def self.glissando_pitches(start_pitch, target_pitch)
start, finish = start_pitch.total_semitones, target_pitch.total_semitones
if finish >= start
semitones = start.ceil.upto(finish.floor).to_a
else
semitones = start.floor.downto(finish.ceil).to_a
end
if semitones.empty? || semitones[0] != start
semitones.unshift(start)
end
if semitones.size > 1 && semitones[-1] == finish
semitones.pop
end
semitones.map do |semitone|
Music::Transcription::Pitch.from_semitones(semitone)
end
end
def self.glissando_elements(start_pitch, target_pitch, duration, accented)
pitches = glissando_pitches(start_pitch, target_pitch)
subdur = Rational(duration, pitches.size)
pitches.map do |pitch|
LegatoElement.new(subdur, pitch, accented)
end
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems