commit 21bae14558e7da9a27351c5a8ef900f2129055e8
Author: Jordon Moss <mossj32@gmail.com>
Date:   Fri Aug 11 18:05:04 2023 -0700

    engine: add a few rotatesprite flags for fine control of interpolation.

See https://voidpoint.io/terminx/eduke32 for more details.