Reconstructs the binary's five-state LOOK machine (controls mapper tail,
part_013.c:396-459) as proper members/methods:
- MECHMPPR: LookState enum (None/Left/Right/Behind/Down) + lookState/
previousLookState (out of reserved[24] -> [22]). InterpretControls picks the
state from the look buttons each frame and on a CHANGE calls
Mech::CommitLookState. BT_FORCE_LOOK=<1..4> dev hook.
- MECH: authored look angles lookLeft/Right/Front/BackAngle (deg->rad from the
GameModel resource, guarded) + lookPitch/lookYaw + CommitLookState(int):
side looks yaw by the authored angle, look-behind = yaw pi + lookBackAngle
pitch, look-down = lookFrontAngle pitch, forward = identity. The per-frame
eyepoint compose in Simulate adds the live Torso elevation on top.
(reservedState [208] -> [202].)
- Deferred inside the commit (needs MechWeapon viewFireEnable/rearFiring):
per-view weapon fire re-arm + HUD pip group-mask flip.
Verified headlessly: model reads clean authored angles (L=60 R=-60 F=-10 B=0
deg -- ModelResource layout confirmed again); BT_FORCE_LOOK=3 fires ONE commit
([look] state=3 yaw=3.14159 pitch=0) and the per-frame compose holds eyeYaw=pi
with eyePitch=0.349066 (lookBackAngle + the 20deg-clamped elevation). Zero Fail.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Investigated the next planned binding (elevation -> gun joints jointlgun/
jointrgun) before implementing it, and found it was the wrong target: BT411's
own reverse-engineering history records that NO gun/arm elevation joint exists
in the authentic engine. The pod's stick-Y aim pitches the COCKPIT EYE and the
weapon boresight directly (mech4.cpp @~5219, pixel-calibrated against real
screenshots) -- the torso geometry never tilts for elevation on this mech
family. Reconstructing a gun-joint binding would have been invented behavior.
- MECH.HPP: EulerAngles eyepointRotation member (out of reservedState, now
[208]) + GetEyepointRotation() accessor.
- MECH.CPP: composed each frame in Simulate -- eyepointRotation =
EulerAngles(Radian(Normalize(lookPitch+elevation)), Radian(Normalize(lookYaw)),
Radian(0)), reading Torso::CurrentElevation() via sinkSourceSubsystem.
lookPitch/lookYaw are 0 until the look-button wave (BTCommitLookState) lands.
Verified: BT_FORCE_ELEV=0.8 -> torsoElev and eyePitch both read 0.349066 (the
authentic 20 degree resource limit) every frame, exact match; neutral -> 0.
Zero Fail. Corrected TORSO.NOTES.md's prior (wrong) "next: gun joints" note.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Reconstructs the shared skeleton-joint resolver and binds the first subsystem
(Torso) to the live skeleton.
- Mech::ResolveJoint(name) (mech.cpp @00424b60): GetSegment(name) -> segment
joint index -> GetJointSubsystem()->GetJoint(idx).
- Verified the JointedMover base streams the full skeleton headlessly:
jointCount=19, 40 named segments (gun joints jointlgun/jointrgun, shoulders,
hip, leg joints jointlthigh..jointrankle). BT_MECH_LOG [skel] summary;
BT_SKEL_DUMP lists every segment/jointIdx.
- Torso resolves + binds its twist joint (ResolveJoint(torsoHorizontalJoint))
and pushes currentTwist onto it via Joint::SetRotation (hinge->Radian,
ball->EulerAngles yaw). The TEST.EGG mech has a fixed torso (horizJoint='',
enabled=0) so its twist path is inert -- correct + guarded, zero Fail.
Next joint piece: elevation -> gun joints (jointlgun/jointrgun, the fixed-torso
aim mechanism) via weapon-joint binding; then gait leg animation. Both are
VISIBLE only under the renderer; headlessly the joint transforms are loggable.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Installs Mech::Simulate as the mech's per-frame Performance (was DoNothingOnce).
Reconstructs the load-bearing spine of the 1995 Simulate (mech4.cpp @004ab430):
integrate the body velocity into localOrigin (linearPosition.AddScaled(..,
worldLinearVelocity, dt)) and commit the Origin to the world transform with the
engine idiom (localToWorld = localOrigin, per ENTITY.cpp:988 / MOVER.cpp:850).
Uses the NAMED engine base Mover fields (localOrigin/localToWorld/
worldLinearVelocity) -- BT411's MechBaseLayoutCheck proved the WinTesla decomp's
raw this+0x100/0x260 offsets actually stomp those base fields; the clean 1995
build addresses them by name.
- MECH.HPP: Mech Performance typedef + SetPerformance + Simulate() decl.
- MECH.CPP: SetPerformance(&Mech::Simulate) at ctor tail; Simulate body.
Verified headlessly (BT_MECH_LOG "[sim] mech pos=" 1Hz): BT_DRIVE="5,0,10"
advances the mech +5.0/s x, +10.0/s z (y fixed) = exactly the injected world
velocity; no BT_DRIVE -> worldLinearVelocity is 0, mech holds spawn pose. Zero
Fail/Exception either way. BT_DRIVE is a retained dev hook for headless motion.
Deferred (locomotion wave): gait-cycle self-propulsion feeding worldLinearVelocity
(IntegrateMotion->AdvanceBodyAnimation, steered by mapper throttle/turn), heading
integration, terrain-height drop, cockpit telemetry filters.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Replaced MECH.HPP reserved[331] with the named Mech-own members: cached subsystem
pointers (sensor/gyro/sinkSource/hud) + messageManager + weaponCount, the 5
capability chains (ChainOf<Subsystem*>), and the embedded status/animation state
(4 AlarmIndicators, Reticle, 3 StateIndicators, 2 SequenceControllers, NameFilter,
telemetryFilter[5]=AverageOf<Scalar>, 3 CStrings) + a reservedState pad for the
phase-5 per-frame fields. The subsystem ROSTER (subsystemArray/subsystemCount)
lives in the base Entity (GetSubsystem/GetSubsystemCount), so the Mech only caches
back-pointers.
The Mech ctor now CONSTRUCTS all embedded members (alarms Initialize'd, reticle
armed, state indicators sized, telemetry filters sized, sequence controllers
Init'd) -- compile-verified -- then halts at the segment walk (the remaining
piece). BT: 42 ok; tree links clean.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
All 10 surviving original TUs plus the reconstructed BTL4APP.CPP pilot build
clean with the authentic OPT.MAK flags (compile410.sh --sweep). First time
the 4.10 BattleTech source has compiled since 1996.
- layout_probe.cpp: the period compiler measures 1995 layouts from the
surviving headers; validated 3/3 against binary alloc sizes (BTMission
0xFC, BTL4ModeManager 0xC, BTRegistry 0x10). Base boundary: Simulation
0xD0 / Entity 0x1C4 / Mover 0x300 / JointedMover 0x328 => Mech-own region
0x328-0x854 (MECH-LAYOUT.md staging worksheet).
- 13 staged headers close the family ([T3] reserved[]-parked layouts;
interfaces PROVEN by the surviving consumers): MECH, MECHSUB, HEAT,
POWERSUB, MECHWEAP, EMITTER, MECHMPPR, BTPLAYER (BTPlayer__MakeMessage =
Player's 8 args + roleName/teamName [T1 via BTREG]), PROJTILE, MISSILE,
BTL4MPPR, BTL4VID + the round-2 BTCNSL/BTSCNRL.
- compile410.sh: PCH gate retired (bt.hpp/mungal4.hpp full include sets),
DPL SDK roots on the include line.
- BTL4APP.CPP: appmgr include + GetApplicationManager()->GetFrameRate() +
ResourceDescription:: scoping; Fail() held at its recorded line 400.
- Evidence ledgers: STAGED-HEADERS.NOTES.md, MECH-LAYOUT.md, BACKFILLS,
BTCNSL (binary-recovered console wire IDs), BTSCNRL.
Remaining for a linkable BTL4OPT: the ~40 missing TU bodies (917-function
manifest) - the header skeleton they grow into now exists and compiles.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
CydandClaude Fable 5