Class: When::Ephemeris::Star::Fixed

Inherits:
When::Ephemeris::Star show all
Defined in:
lib/when_exe/ephemeris.rb

Overview

恒星

Constant Summary collapse

Coef = 
100.0 / (3600*1000)

Constants included from When::Ephemeris

AU, AcS, BCENT, C0, CIRCLE, COS, COSL, COSLT, COST, DAY, DEG, EPOCH1800, EPOCH1900, EPOCH1975, EPOCH2000, FARAWAY, JCENT, JYEAR, Jupiter, LIN, Mars, Mercury, Neptune, PSEC, Pluto, When::Ephemeris::SIN, When::Ephemeris::SINL, When::Ephemeris::SINLT, When::Ephemeris::SINT, When::Ephemeris::Saturn, Uranus, Venus

Constants included from Namespace

Namespace::DC, Namespace::DCQ, Namespace::DCT, Namespace::FOAF, Namespace::OWL, Namespace::RDF, Namespace::RDFC, Namespace::RDFS, Namespace::RSS, Namespace::XSD

Instance Attribute Summary

Attributes inherited from When::Ephemeris::Star

#delta_phi, #delta_radius, #delta_theta, #parallax, #phi, #t0, #theta

Attributes inherited from CelestialObject

#aberration, #luminosity

Attributes inherited from BasicTypes::Object

#label

Attributes included from Parts::Resource

#child, #keys, #locale, #namespace

Instance Method Summary collapse

Methods inherited from When::Ephemeris::Star

#apparent_luminosity, #apparent_radius, #bayer_name

Methods inherited from CelestialObject

#coords

Methods included from When::Ephemeris

_adjust, _rot, _to_p2, _to_p3, _to_r3, acos, asin, cosc, cosd, delta_e, delta_p, julian_century_from_2000, julian_year_from_1975, obl, polynomial, root, sinc, sind, tanc, tand, trigonometric

Methods included from Parts::Resource

#[], #^, _instance, _setup_, _setup_info, base_uri, #each, #enum_for, #hierarchy, #include?, #included?, #iri, #leaf?, #m17n, #map, #parent, #registered?, root_dir

Methods included from Parts::Resource::Pool

#[], #[]=, #_setup_

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class When::Parts::Resource

Instance Method Details

#_coords(t) ⇒ When::Ephemeris::Coords

天体位置 (黄道座標)

Parameters:

Returns:



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# File 'lib/when_exe/ephemeris.rb', line 884

def _coords(t)
  t  = +t
  c2000 = julian_century_from_2000(t)
  c1900 = (@t0-1900.0)/100.0
  dt    = (t-(EPOCH1900-0.68648354))/BCENT - c1900
  Coords.polar(
      (@phi      + dt * @delta_phi   * Coef) / 360,
      (@theta    + dt * @delta_theta * Coef) / 360,
       @distance - dt * @delta_radius / (AU/(BCENT*86400.0))).
    precession(dt, c1900).
    rotate_x(-obl(c2000)).
    nutation(c2000)
end