Sha256: 5b88335750bf6a220b687ea11868202aa5c0e43e0f1046280537b5ad39ea80bd
Contents?: true
Size: 1.8 KB
Versions: 5
Compression:
Stored size: 1.8 KB
Contents
class HeadMusic::RhythmicValue attr_reader :unit, :dots, :tied_value delegate :name, to: :unit, prefix: true delegate :to_s, to: :name def self.get(identifier) case identifier when RhythmicValue identifier when RhythmicUnit new(identifier) when Symbol, String identifier = identifier.to_s.downcase.strip.gsub(/\W+/, '_') from_words(identifier) end end def self.from_words(identifier) new(unit_from_words(identifier), dots: dots_from_words(identifier)) end def self.unit_from_words(identifier) identifier.gsub(/^\w*dotted_/, '') end def self.dots_from_words(identifier) return 0 unless identifier =~ /dotted/ modifier, _ = identifier.split(/_*dotted_*/) case modifier when /tripl\w/ 3 when /doubl\w/ 2 else 1 end end def initialize(unit, dots: nil, tied_value: nil) @unit = HeadMusic::RhythmicUnit.get(unit) @dots = [0, 1, 2, 3].include?(dots) ? dots : 0 @tied_value = tied_value end def unit_value unit.relative_value end def relative_value unit_value * multiplier end def total_value relative_value + (tied_value ? tied_value.total_value : 0) end def multiplier (0..dots).reduce(0) { |sum, i| sum + (1.0/2)**i } end def ticks HeadMusic::Rhythm::PPQN * 4 * total_value end def per_whole 1.0 / relative_value end def name_modifier_prefix case dots when 1 'dotted' when 2 'double-dotted' when 3 'triple-dotted' end end def single_value_name [name_modifier_prefix, unit_name].compact.join(' ') end def name if tied_value [single_value_name, tied_value.name].compact.join(' tied to ') else single_value_name end end def ==(other) to_s == other.to_s end end
Version data entries
5 entries across 5 versions & 1 rubygems