Whenever an application uses transformations, it should handle any round-off error that occurs after multiple scaling, rotation, shear, or reflection transformations. The rounding error increases because a transformation is incrementally updated by the amount of the error with, for example, the TRANSFORM_ADD option. For the rotation to remain accurate, the application should recalculate the transformation, rather than accumulate many small changes.

For example, if an application uses a rotation transformation to rotate the hands of a clock, the accuracy of the clock diminishes due to rounding off after the transformation. The rounding error should be periodically removed by using the TRANSFORM_REPLACE option at known points, for example, every 90ø or every complete revolution of the clock.