Module: AstroChart

Defined in:
lib/astro_chart.rb,
lib/astro_chart/pure.rb,
lib/astro_chart/chart.rb,
lib/astro_chart/houses.rb,
lib/astro_chart/zodiac.rb,
lib/astro_chart/aspects.rb,
lib/astro_chart/planets.rb,
lib/astro_chart/version.rb,
lib/astro_chart/synastry.rb,
lib/astro_chart/ephemeris.rb,
lib/astro_chart/pure/core.rb,
lib/astro_chart/pure/moon.rb,
lib/astro_chart/pure/pluto.rb,
lib/astro_chart/pure/houses.rb,
lib/astro_chart/pure/vsop87.rb,
lib/astro_chart/pure/moon_elp.rb,
lib/astro_chart/time_conversion.rb,
lib/astro_chart/pure/vsop87_data.rb

Defined Under Namespace

Modules: Aspects, Ephemeris, Houses, Planets, Pure, Synastry, TimeConversion, Zodiac Classes: Chart

Constant Summary collapse

VERSION = 
"0.2.0"
DEFAULT_BACKEND = 
:pure

Class Method Summary collapse

Class Method Details

.backend ⇒ Object

Current ephemeris backend (:pure or :swiss). Defaults to :pure.



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# File 'lib/astro_chart/ephemeris.rb', line 8

def backend
  @backend ||= DEFAULT_BACKEND
end

.backend=(name) ⇒ Object

Switch the ephemeris backend.

AstroChart.backend = :pure   # pure-Ruby (default, no C extension needed)
AstroChart.backend = :swiss  # Swiss Ephemeris C extension (AGPL)

Selecting :swiss loads the C extension on demand; a missing/uncompiled extension raises LoadError with an explicit message instead of failing silently at call time.



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# File 'lib/astro_chart/ephemeris.rb', line 20

def backend=(name)
  case name
  when :pure
    @backend = :pure
  when :swiss
    load_swiss_extension!
    @backend = :swiss
  else
    raise ArgumentError,
          "unknown backend #{name.inspect} (expected :pure or :swiss)"
  end
end

.load_swiss_extension! ⇒ Object 



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# File 'lib/astro_chart/ephemeris.rb', line 33

def load_swiss_extension!
  return if defined?(AstroChart::Ext)

  begin
    require_relative "astro_chart_ext"
  rescue LoadError => e
    raise LoadError,
          "AstroChart :swiss backend requires the compiled Swiss Ephemeris C extension " \
          "(astro_chart_ext). Build it with `rake compile` (or `ruby ext/astro_chart/extconf.rb && make`), " \
          "or use the default pure-Ruby backend (AstroChart.backend = :pure). " \
          "Original error: #{e.message}"
  end
end