module Pokeplot
  module Helpers
    class Math
      class << self

        def deg_to_rad(deg)
          return deg * (::Math::PI / 180)
        end

        def get_earth_radius(lat)
          earth_radius_max = 6378137.0
          earth_radius_min = 6356752.3
          latrad = deg_to_rad(lat)
          return (1.0/(((::Math.cos(latrad))/earth_radius_max)**(2) + ((::Math.sin(latrad))/earth_radius_min)**(2)))**(1.0/2)
        end

      end
    end
  end
end