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Contents
# frozen_string_literal: true
require_relative '../../const/number'
require_relative '../../cycle/remainder'
# :nodoc:
module Zakuro
# :nodoc:
module Genka
# :nodoc:
module Origin
#
# January 1月
#
module January
# @return [Integer] 日法
DAY = Const::Number::Cycle::DAY
# @return [Float] 朔望月
SYNODIC_MONTH = Const::Number::Cycle::SYNODIC_MONTH.to_f
# @return [Integer] 西暦0年の積年
WESTERN_YEAR = Const::Number::Stack::WESTERN_YEAR
# @return [Float] 19年=235朔望月
METONIC_CYCLE = 235 / 19.to_f
class << self
#
# 1月経朔を求める
#
# @param [Integer] western_year 西暦年
#
# @return [Remainder] 11月経朔
#
def get(western_year:)
# (1612 + x) * 235 / 19 = A ...余り
stack = ((WESTERN_YEAR + western_year) * METONIC_CYCLE).to_i
# A * 22207 / 752 = B ...余りが朔の小余
minute_total = (stack * SYNODIC_MONTH / DAY).to_i
minute = (stack * SYNODIC_MONTH % DAY).to_i
# B / 60 = C ...余りが朔の大余
day = minute_total % Cycle::Remainder::LIMIT
# p stack
# p minute_total
# p minute
# p day
Cycle::Remainder.new(day: day, minute: minute, second: 0)
end
end
end
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems