CydandClaude Fable 5
bc59e39f41
The BT keyframe-animation player embedded in the Mech as legAnimation/ bodyAnimation. Struct field layout (from BT411's binary-offset map), default ctor, dtor, and Init(Mech*) reconstructed and compile-verified; Init is ctor-time (Mech ctor calls legAnimation.Init(this)/bodyAnimation.Init(this)) so it's real (binds owner + caches owner->GetJointSubsystem()). The per-frame gait engine (SelectSequence/Advance/Reset) is staged with Fail bodies -- it fires only once the mech is ticking, past the current ctor frontier. BT stage 23 ok; full tree still links clean. Evidence + real/staged split in SEQCTL.NOTES.md. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2.1 KiB
SEQCTL.HPP / .CPP — reconstruction notes
Status: struct + ctor/dtor + Init RECONSTRUCTED (compile-verified); the per-frame playback methods (SelectSequence / Advance / Reset) staged. Helper 2/3 of the Mech embedded helpers (MECH-LAYOUT step 1).
SequenceController — the BT keyframe-animation player embedded in the Mech as
legAnimation (@0x65c) and bodyAnimation (@0x6bc). Plays a gait clip: walks
keyframes, interpolates each animated joint's rotation, writes it through the
joint subsystem, returns the root-translation distance advanced. Absent from the
4.10 archive and the RP engine; reconstructed from the shipped binary + BT411's
seqctl.cpp decomp.
What's real vs staged
- Real (ctor-time): default ctor (zeroes all fields) and
Init(Mech*)— the Mech ctor callslegAnimation.Init(this)/bodyAnimation.Init(this)(binary; BT411 mech.cpp:685-686), so Init must run at construction. Init bindsownerand cachesjointSubsystem = owner->GetJointSubsystem()(JMOVER.HPP:104, returnsJointSubsystem*),clipResource = NULL. - Staged (per-frame, after boot):
SelectSequence(@004277a8, clip parse + resource lock),Advance(@0042790c, keyframe interpolation + joint writes — the gait engine, ~145 lines in the decomp),Reset(@004283b8). These fire only once the mech is ticking, well past the current ctor frontier, so they Fail loudly until reconstructed.
Field layout
Field set + order from BT411's binary-offset map (keyframeCount +0x14 …
callbackArg3 +0x50). Byte-exact offsets are not required for the functional
build (only wire/update-record layout needs that, and SequenceController is not
serialised) — the members are declared as named fields and BC4.52 lays them out;
the Mech's legAnimation/bodyAnimation slots size to sizeof(SequenceController)
self-consistently.
Placement
1995 filename unknown (decomp-only; BT411 used seqctl.cpp). Filed as BT/SEQCTL.HPP + SEQCTL.CPP. Not in the authentic BT.MAK member list, so the build appends seqctl.obj to bt.lib via the extra-objs fallback (order is immaterial — no static init).