gistfile1.rb

def calculate_spacial_index(index)
  spacial_index = Array.new(@dimensions)
  spacial_index[-1] = index % @shape[-1]
  dimensions = @dimensions - 2
  for dimension in (dimensions..0) do
    offset = calculate_internal_offset(dimension)
    previous_index = spacial_index[dimension + 1]
    current_shape = @shape[dimension]
    current_index = index - previous_index
    current_index /= offset
    current_index %= current_shape
    spacial_index[dimension] = current_index
  end
  return spacial_index
end