code: def map_coords(x, y)
  			check_coords(x, y)
  			y = 7 - y
  			case rotation
  			when 90
  				x, y = y, 7 - x
  			when 180
  				x, y = 7 - x, 7 - y
  			when 270
  				x, y = 7 - y, x
  			end
  
  			UHAT_MAP[x][y]
  		end
docs: Maps +x+, +y+ coordinates to index on the physical matrix
   (takes rotation into account)