Class: Nerpin::Nrpn::Base

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

Direct Known Subclasses

Micron

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id, key, min, max) ⇒ Base

Returns a new instance of Base.



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# File 'lib/nerpin/nrpn.rb', line 32

def initialize(id, key, min, max)
  @id  = id
  @key = key
  @min = min
  @max = max
end

Instance Attribute Details

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/nerpin/nrpn.rb', line 6

def id
  @id
end

#key ⇒ Object (readonly)

Returns the value of attribute key.



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# File 'lib/nerpin/nrpn.rb', line 6

def key
  @key
end

#max ⇒ Object (readonly)

Returns the value of attribute max.



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# File 'lib/nerpin/nrpn.rb', line 6

def max
  @max
end

#min ⇒ Object (readonly)

Returns the value of attribute min.



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# File 'lib/nerpin/nrpn.rb', line 6

def min
  @min
end

Class Method Details

.find_by_key(key) ⇒ Object 



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# File 'lib/nerpin/nrpn.rb', line 9

def find_by_key(key)
  nrpns[key]
end

.nrpns ⇒ Object 



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# File 'lib/nerpin/nrpn.rb', line 13

def nrpns
  return @nrpns if @nrpns

  data = JSON.parse(
    open(
      File.dirname(
        File.expand_path(__FILE__)
      ) + '/../../data/nrpn/%s.json' % self.name.split(/::/).last.downcase
    ).read
  )

  @nrpns = Hash[
    data.map do |k, v|
      [k.to_sym, new(v['id'], k.to_sym, v['min'], v['max'])]
    end
  ].freeze
end

Instance Method Details

#sample ⇒ Object 



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# File 'lib/nerpin/nrpn.rb', line 47

def sample
  value(rand(min.abs + max + (min < 0 ? 2 : 1)) - min.abs - (min < 0 ? 1 : 0))
end

#value(value) ⇒ Object 



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# File 'lib/nerpin/nrpn.rb', line 39

def value(value)
  raise 'subclass must override this'
end

#value_at(scale) ⇒ Object 



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# File 'lib/nerpin/nrpn.rb', line 43

def value_at(scale)
  value((((min.abs + max) * scale) - min.abs).to_i)
end