Class: Proj::Unit

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

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id, to_meter, factor, name) ⇒ Unit

Returns a new instance of Unit.



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# File 'lib/unit.rb', line 31

def initialize(id, to_meter, factor, name)
  @id = id
  @to_meter = to_meter
  @factor = factor
  @name = name
end

Instance Attribute Details

#factor ⇒ Object (readonly)

Returns the value of attribute factor.



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# File 'lib/unit.rb', line 3

def factor
  @factor
end

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/unit.rb', line 3

def id
  @id
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/unit.rb', line 3

def name
  @name
end

#to_meter ⇒ Object (readonly)

Returns the value of attribute to_meter.



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# File 'lib/unit.rb', line 3

def to_meter
  @to_meter
end

Class Method Details

.get(id) ⇒ Object 



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# File 'lib/unit.rb', line 27

def self.get(id)
  self.list.find {|ellipsoid| ellipsoid.id == id}
end

.list ⇒ Object 



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# File 'lib/unit.rb', line 5

def self.list
  # First get linear units
  pointer_to_array = FFI::Pointer.new(Api::PJ_UNITS, Api.proj_list_units)
  result = Array.new
  0.step do |i|
    ellipse_info = Api::PJ_UNITS.new(pointer_to_array[i])
    break if ellipse_info[:id].nil?
    result << self.new(ellipse_info[:id], ellipse_info[:to_meter], ellipse_info[:factor], ellipse_info[:name])
  end

  # Now get angular linear units
  if Api.method_defined?(:proj_list_angular_units)
    pointer_to_array = FFI::Pointer.new(Api::PJ_UNITS, Api.proj_list_angular_units)
    0.step do |i|
      ellipse_info = Api::PJ_UNITS.new(pointer_to_array[i])
      break result if ellipse_info[:id].nil?
      result << self.new(ellipse_info[:id], ellipse_info[:to_meter], ellipse_info[:factor], ellipse_info[:name])
    end
  end
  result
end

Instance Method Details

#<=>(other) ⇒ Object 



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# File 'lib/unit.rb', line 38

def <=>(other)
  self.id <=> other.id
end

#==(other) ⇒ Object 



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# File 'lib/unit.rb', line 42

def ==(other)
  self.id == other.id
end

#inspect ⇒ Object 



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# File 'lib/unit.rb', line 50

def inspect
  "#<#{self.class} id=\"#{id}\", to_meter=\"#{to_meter}\", factor=\"#{factor}\", name=\"#{name}\">"
end

#to_s ⇒ Object 



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# File 'lib/unit.rb', line 46

def to_s
  self.id
end