# File lib/compass/sass_extensions/sprites/layout_methods.rb, line 106
        def calculate_diagonal_positions
          previous = nil
          @images.each_with_index do |image, index|
            if previous.nil?
              previous = image
              image.top = @height - image.height
              image.left = 0
              next
            end
            image.top = previous.top - image.height
            image.left = previous.left + previous.width
            previous = image
          end
        end