Class: Geospatial::Distance

Inherits:
Object
  • Object
show all
Defined in:
lib/geospatial/distance.rb

Overview

This location is specifically relating to a WGS84 coordinate on Earth.

Constant Summary collapse

UNITS = 
['m', 'km'].freeze

Instance Method Summary collapse

Constructor Details

#initialize(value) ⇒ Distance

Distance in meters:



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# File 'lib/geospatial/distance.rb', line 25

def initialize(value)
  @value = value
  @formatted_value = nil
end

Instance Method Details

#*(other) ⇒ Object 



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# File 'lib/geospatial/distance.rb', line 68

def * other
  Distance.new(@value * other.to_f)
end

#+(other) ⇒ Object 



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# File 'lib/geospatial/distance.rb', line 60

def + other
  Distance.new(@value + other.to_f)
end

#-(other) ⇒ Object 



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# File 'lib/geospatial/distance.rb', line 64

def - other
  Distance.new(@value - other.to_f)
end

#/(other) ⇒ Object 



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# File 'lib/geospatial/distance.rb', line 72

def / other
  Distance.new(@value / other.to_f)
end

#==(other) ⇒ Object 



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# File 'lib/geospatial/distance.rb', line 76

def == other
  @value == other.to_f
end

#formatted_value ⇒ Object Also known as: to_s 



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# File 'lib/geospatial/distance.rb', line 38

def formatted_value
  unless @formatted_value
    scale = 0
    value = @value
    
    while value > 1000 and scale < UNITS.size
      value /= 1000.0
      scale += 1
    end
    
    @formatted_value = sprintf("%0.#{scale}f%s", value, UNITS.fetch(scale))
  end
  
  return @formatted_value
end

#freeze ⇒ Object 



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# File 'lib/geospatial/distance.rb', line 30

def freeze
  formatted_value
  
  super
end

#to_f ⇒ Object 



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# File 'lib/geospatial/distance.rb', line 56

def to_f
  @value
end