Module: AstroChart::Houses

Defined in:
lib/astro_chart/houses.rb

Class Method Summary collapse

Class Method Details

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

Calculate house cusps and ascendant from Julian Day + coordinates. Returns [cusps_array(12), ascendant_degree].



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# File 'lib/astro_chart/houses.rb', line 5

def self.calculate(jd, latitude, longitude, system = "P")
  data = Ephemeris.houses(jd, latitude, longitude, system)
  [data["cusps"], data["ascendant"]]
end

.find_house(planet_pos, cusps) ⇒ Object

Determine which house (1-12) a planet falls in based on house cusps.



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# File 'lib/astro_chart/houses.rb', line 11

def self.find_house(planet_pos, cusps)
  return nil if planet_pos.nil? || cusps.nil? || cusps.empty?

  n = cusps.length
  base = cusps[0]

  # Normalize house cusps relative to first house cusp
  norm_cusps = cusps.map { |h| h >= base ? h : h + 360.0 }
  norm_pos = planet_pos >= base ? planet_pos : planet_pos + 360.0

  n.times do |i|
    start_deg = norm_cusps[i]
    end_deg = i < n - 1 ? norm_cusps[i + 1] : norm_cusps[0] + 360.0
    return i + 1 if norm_pos >= start_deg && norm_pos < end_deg
  end

  nil
end