Class: GeoDistance::Spherical

Inherits:
DistanceFormula show all
Defined in:
lib/geo-distance/formula/spherical.rb

Class Method Summary collapse

Methods inherited from DistanceFormula

geo_distance, get_points, get_units, #initialize

Constructor Details

This class inherits a constructor from GeoDistance::DistanceFormula

Class Method Details

.distance(*args) ⇒ Object 



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# File 'lib/geo-distance/formula/spherical.rb', line 28

def self.distance *args
  from, to, units = get_points(args)        
  
  return 0.0 if from == to #return 0.0 if points are have the same coordinates

  c = Math.acos( 
    Math.sin(degrees_to_radians(from.lat)) * Math.sin(degrees_to_radians(to.lat)) + 
    Math.cos(degrees_to_radians(from.lat)) * Math.cos(degrees_to_radians(to.lat)) * 
    Math.cos(degrees_to_radians(to.lng) - degrees_to_radians(from.lng))
  ).to_deg
  
  units ? c.radians_to(units) : c
rescue Errno::EDOM
  0.0
end