Method: Grid#adja_index

Defined in:
lib/cem/cruzzles.rb

#adja_index(x, y = nil) ⇒ Object 



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# File 'lib/cem/cruzzles.rb', line 424

def adja_index(x,y=nil)
  if y == nil
    if x.respond_to?(:x) && x.respond_to?(:y)
      y = x.y
      x = x.x
    else
      raise "Need Point2D with :x and :y or two parameters"
    end
  end

  result = []
  if x > 0
    if y > 0
      result << Point2D.new(x-1,y-1)
    end
    result << Point2D.new(x-1,y)
    if y + 1 < @data.size - 1
      result << Point2D.new(x-1, y+1)
    end
  end
  if y > 0
    result << Point2D.new(x,y-1)
  end
  
  # result << Point2D.new(x,y)

  
  if y + 1 < @data.size - 1
    result << Point2D.new(x, y+1)
  end
  if x + 1 < @data[0].size - 1
    if y > 0
      result << Point2D.new(x+1,y-1)
    end
    result << Point2D.new(x+1,y)
    if y + 1 < @data.size - 1
      result << Point2D.new(x+1, y+1)
    end
  end
  return result
end