# File lib/rantly/generator.rb, line 144
  def float(distribution=nil, params={})
    case distribution
    when :normal
      params[:center] ||= 0
      params[:scale] ||= 1
      raise "The distribution scale should be greater than zero" unless params[:scale] > 0
      # Sum of 6 draws from a uniform distribution give as a draw of a normal
      # distribution centered in 3 (central limit theorem).
      ([rand, rand, rand, rand, rand, rand].reduce(0, :+) - 3) * params[:scale] + params[:center]
    else
      rand
    end
  end