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# frozen_string_literal: true # A melodic interval is the distance between one note and the next. class HeadMusic::MelodicInterval attr_reader :first_note, :second_note def initialize(note1, note2) @first_note = note1 @second_note = note2 end def functional_interval @functional_interval ||= HeadMusic::FunctionalInterval.new(first_pitch, second_pitch) end def position_start first_note.position end def position_end second_note.next_position end def notes [first_note, second_note] end def pitches [first_pitch, second_pitch] end def first_pitch @first_pitch ||= first_note.pitch end def second_pitch @second_pitch ||= second_note.pitch end def to_s [direction, functional_interval].join(' ') end def ascending? direction == :ascending end def descending? direction == :descending end def moving? ascending? || descending? end def repetition? !moving? end def spans?(pitch) pitch >= low_pitch && pitch <= high_pitch end def high_pitch pitches.max end def low_pitch pitches.min end def direction @direction ||= if first_pitch < second_pitch :ascending elsif first_pitch > second_pitch :descending else :none end end def spells_consonant_triad_with?(other_interval) return false if step? || other_interval.step? combined_pitches = (pitches + other_interval.pitches).uniq return false if combined_pitches.length < 3 HeadMusic::Chord.new(combined_pitches).consonant_triad? end def method_missing(method_name, *args, &block) respond_to_missing?(method_name) ? functional_interval.send(method_name, *args, &block) : super end def respond_to_missing?(method_name, *_args) functional_interval.respond_to?(method_name) end end
Version data entries
1 entries across 1 versions & 1 rubygems
Version | Path |
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head_music-0.22.0 | lib/head_music/melodic_interval.rb |