Native RE of the largest remaining SC0000 rendering GAP band: resolved every
handler in 0x21c-0x243 (+0x2bd/0x2bf) via the dispatch table (ctx[0x26c93+op]
from FUN_00413860). The cluster is ONE subsystem = sprite transform + animation/
tween; two members already named (0x234 anim_start, 0x238 set_anim_clock).
Decoded representative ops 0x220/0x21e (argc6, cmd-type 0xd, transform worker
(handle,op2,op3,f4,f5,f6); 0x21e normalizes floats /_DAT_00571c28 -> scale%);
worker gfx_anim_set_channel@0x47eaa0 arms an anim channel on the same object
model GfxState tracks. anim_start+set_anim_clock => a per-frame clock that makes
AE* fades animate rather than snap.
engine-re.md: full op->handler map + contract. Ghidra annotated (renamed
gfx_op_0x220_set_transform3_abs / gfx_op_0x21e_set_transform3_norm /
gfx_anim_set_channel + plate comments, saved).
Add the approved brainstorming spec for the opening-slice implementation
(wall-clock tween, opening-driven subset, passive GfxState + compositor tween +
alpha-aware blit).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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