Module: AstroChart::Ephemeris

Defined in:
lib/astro_chart/ephemeris.rb

Overview

Backend-agnostic ephemeris facade. All public callers go through this module so the backend (:pure / :swiss) can be swapped without touching the rest of the code.

Constant Summary collapse

PLANETS =

SE-convention planet ids (numeric literals so the :pure default works without the C extension loaded; values match AstroChart::Ext constants when the extension is present).

{
  "太陽"   => 0,   # SUN
  "月亮"   => 1,   # MOON
  "水星"   => 2,   # MERCURY
  "金星"   => 3,   # VENUS
  "火星"   => 4,   # MARS
  "木星"   => 5,   # JUPITER
  "土星"   => 6,   # SATURN
  "天王星"  => 7,   # URANUS
  "海王星"  => 8,   # NEPTUNE
  "冥王星"  => 9,   # PLUTO
  "北交點"  => 11,  # TRUE_NODE
}.freeze

Class Method Summary collapse

Class Method Details

.calc_ut(jd, planet_id) ⇒ Object

Calculate planet apparent ecliptic longitude (degrees 0-360).



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# File 'lib/astro_chart/ephemeris.rb', line 78

def self.calc_ut(jd, planet_id)
  case AstroChart.backend
  when :swiss then Ext.calc_ut(jd, planet_id)
  else Pure.calc_ut(jd, planet_id)
  end
end

.houses(jd, latitude, longitude, system = "P") ⇒ Object

Calculate house cusps + ascendant. Returns { "cusps" => [12 floats], "ascendant" => float, "mc" => float }



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# File 'lib/astro_chart/ephemeris.rb', line 87

def self.houses(jd, latitude, longitude, system = "P")
  case AstroChart.backend
  when :swiss then Ext.houses(jd, latitude, longitude, system.ord)
  else Pure.houses(jd, latitude, longitude, system)
  end
end

.julday(year, month, day, hour) ⇒ Object

Convert date/time to Julian Day number.



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# File 'lib/astro_chart/ephemeris.rb', line 70

def self.julday(year, month, day, hour)
  case AstroChart.backend
  when :swiss then Ext.julday(year, month, day, hour)
  else Pure.julday(year, month, day, hour)
  end
end