As implied in adffa1c, a single segment-switching translation unit for
both rendering functions and game logic is the most straightforward
solution for those two games. Especially once you look at TH04, and
realize that the wildly chaotic order of the *_fg_render() functions in
the first code segment exactly matches the order of the *_update()
functions in the third.
Part of P0225, funded by Enderwolf, Blue Bolt, 32th System, and Yanga.
Way easier to read compared to the mental gymnastics of the original
"offset + range" form, especially since we can also abstract away
subpixels with another layer of wrapper functions. Also brings a bunch
of new speed/angle symmetries to light.
Part of P0190, funded by nrook.
Wow, so the boss_stuff_t structure did exist in the original code after
all. This is the only function in all of TH04 and TH05 that confirms
it – in dea40ad, it just seemed like something I made up, out of
convenience.
Completes P0109, funded by [Anonymous] and Blue Bolt.
nmlgc