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Commits
| Author | SHA1 | Message | Date | |
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 arcattackandClaude Fable 5
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6f5a264835 |
Gitea #47 COMPLETE: the ENG-button attention FLASH is live (jam / bay fire) -- MechTech status scan + BTL4GaugeAlarmManager + lamp chain, all from the binary
The pod behaviour Cyd described -- "on a jam or bay fire the display eng button
for the system flashes" -- is authored data + a five-stage chain, now running:
MechTech::TechnicalAssistance (@004ad33c, per frame)
edge-scans every monitored subsystem's GetStatusFlags() 7-bit condition
mask (TechStatusType: Destroyed 0, Damaged 1, CoolantLeaking 2,
Overheating 3, AmmoBurning 4, Jammed 5, BadPower 6)
-> Start/StopEntityAlarmMessage (@00436688 id 7 size 0x20 / @004366b8 id 8
size 0x1C; broadcast @004364e4; port shape: direct
Start/StopEntityAlarmImplementation calls on the gauge renderer)
-> GaugeAlarmManager::Activate(alarmModel) -- alarmModel = MechTech+0x100 =
the 'mechalrm' ModelList (id 83) -> SearchList(83, type 31) -> the baked
GaugeAlarmStream (id 331, 11 items {condition, lampCode}), decoded:
Destroyed -> gotoEngineering + engCooling + engBusMode
CoolantLeaking -> gotoEngineering + engCooling
AmmoBurning -> gotoEngineering + engEject
Jammed -> gotoEngineering + engEject
BadPower -> gotoEngineering + engBusMode
-> BTL4GaugeAlarmManager::ReadGaugeAlarmStreamItem -- THE REAL BODY, from
@004cc2fc + helpers @004cc108/148/1a0/264/27c + tables @0051cf1c..0x51d084
(gotoEngineering 0x80 = the subsystem's QUAD-SELECT bezel button via
lamp[aux]/mode[aux] tables; 0x81+ descend the eng-page bank; Condenser /
Generator specials on CoolantLeaking; <0x80 = the heat-bank fixed map).
btl4galm.cpp's old bodies were admitted fabrications and its provenance
note ("no override body exists in the image") was wrong -- corrected.
-> LampManager::FindLamp (@00444c80) -> Lamp::SetAlertState (@00444e64, a
COUNTER so stacked alarms hold the flash) -> L4Lamp::NotifyOfStateChange
emits RIO flashFast states 0x37/0x13 (== T0 L4LAMP.cpp:234-239) -> the
pod's physical lamps AND the glass panels (PadRIO IS rioPointer there).
FOUR load-bearing defects found and fixed en route -- each independently fatal
to the feature:
1. HeatableSubsystem's Derivation chained Subsystem directly, SKIPPING
MechSubsystem (written before the WAVE-1 re-basing) -- so EVERY subsystem
on both family branches failed IsDerivedFrom(MechSubsystem), which is
exactly MechTech's monitor filter: the status scan watched NOTHING.
2. MechSubsystem::GetStatusFlags was non-virtual (binary: vtable slot 12) --
the scan's MechSubsystem* call bound statically to the base tier and the
weapon bits could never surface.
3. ProjectileWeapon::GetStatusFlags sat in a Ghidra export gap -- raw-disasm
@004bbf88: base | 0x20 (weaponAlarm==5 Jammed) | 0x10 (linked bin
cookOffArmed@0x18C AmmoBurning). The port had "defer to base".
4. Mech::Reset's respawn sweep blanket-cast every roster entry to
MechSubsystem and called RespawnRepair -- wrong for the Subsystem-level
entries (MechTech 0xBDC, SubsystemMessageManager 0xBD3). On MechTech the
recon damageZone slot lands on its subsystemMonitors chain head: NULL
while the scan was broken (fix #1's bug MASKED this one), but the moment
the monitors populated, RespawnRepair virtual-called through a
SubsystemMonitor as if it were a DamageZone -> load-time crash in
StateIndicator::SetState (caught with cdb; call [edx+14h] on code bytes).
The sweep now filters IsDerivedFrom(MechSubsystem) before the cast.
Also: GUID identities pinned -- 0x50f4bc = PoweredSubsystem::ClassDerivations
(via @004b1208 = its TestInstance; btl4gau2's two "Generator" comments were
wrong, swept), 0x50fb60 = Generator's. A shadow-field instance documented for
the deferred de-shadow: MechSubsystem::damageZone re-declares the PUBLIC engine
Subsystem::damageZone (SUBSYSTM.h:159) -- mechtech's naive `sub->damageZone`
read the never-written engine member (0 monitors again); now reads the recon
member via GetDamageZoneProxy(). Logged in open-questions.
Wiring: BTL4GaugeRenderer now constructs + assigns the BTL4GaugeAlarmManager
(the base ctor NULLs it and Activate Check()s it); MechTech's Report*/
StatusMessageSink stubs are real; alarmModel confirmed baked (= 83) at runtime.
VERIFIED LIVE (scratchpad/lampflash.py, BT_LAMP_LOG chain trace):
[techstat] MechTech id 32 monitors 29 subsystems, alarmModel 83
[techstat] LRM15_1 condition 4 SET (alarmModel 83) <- bay fire armed
[galarm] condition 4 code 0x80 -> lamp 0xd mode 0x1 FLASH
[lamp] 0xd <- 0x37 (FLASHING) <- the select button
[galarm] condition 4 code 0x85 -> lamp 0xb mode 0x4 FLASH <- engEject
[techstat] LRM15_1 condition 4 CLEARED <- detonation clears
[techstat] AmmoBinLRM15_1 condition 0 SET <- bin Destroyed
Regressions: baytest PASS (bay fire kills), baypurge PASS (purge extinguishes),
sim3 3-pod brawl PASS with ZERO crashes (6 kills, organic heat-route bay fires,
respawns clean through the new sweep filter).
Env: BT_LAMP_LOG ([techstat]/[galarm]/[lamp]). KB: gauges-hud (the flash
section), decomp-reference (the GaugeAlarm closure + tables + GUIDs),
open-questions (built-note + the de-shadow deferred item), btl4gau2 comment
sweep. checkctx CLEAN.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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arcattackandClaude Fable 5
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5ae4410914 |
Gitea #46: ammo bay fire now DETONATES and KILLS (+ #47 fire icon) -- three stacked kill-switches removed, the fuse decoded, and a vptr-alias corruption caught by regression
Field report (night 3): "two ammo bay fires and no death" (Cyd + RajelAran; one
purged, one left burning). Root cause = THREE independent kill-switches stacked
on the same path, all in ammobin.cpp:
1. `GameClock::Now() { return 0; }` -- `cookOffTime < Now()` was `0 < 0`, so
an ARMED bay fire never detonated.
2. `InjectHeat(void*) {}` -- the detonation body was a no-op.
3. The bin's Damage record was never stamped -- 0 damage of type 0 (which the
mech TakeDamage handler drops) even if 1+2 had fired.
THE FUSE (raw disasm, scratchpad/disammo.py): the old "RandomDelay" was a Ghidra
carve artifact -- FUN_004dcd94 is __ftol and the export DROPPED the caller's x87
expression. The real bytes @004bd450: fld 10.0 / fmul [ticksPerSecond] /
fadd 0.5 / __ftol -- a FIXED 10.0-SECOND fuse in clock ticks. New gotcha #19
(reconstruction-gotchas.md) documents the __ftol export blind spot.
THE DAMAGE RECORD: bin+0x1F0..0x21C is a real engine `Damage` (FUN_0041db7c IS
Damage::Damage(), byte-matched to T0 DAMAGE.cpp). The linked ProjectileWeapon's
ctor @004bc3fc stamps it from weapon->damageData @0x3A8 via
owner->roster[0x128][res+0x1C0] -- projweap.cpp's old comment called this "the
bin's HUD display block ... wired in the AmmoBin family"; both halves were wrong
and it was wired nowhere. Now stamped (before MissileLauncher's ctor divides by
missileCount -- a missile bin authentically holds the per-SALVO amount).
THE DETONATION (@004ac274 = MechSubsystem::DistributeCriticalHit -- the old
"HeatableSubsystem::InjectHeat" label was wrong, and the old reconstruction
iterated a stand-in CriticalChain whose First()/Next() returned 0):
statusAlarm pulse Exploding(2)->Destroyed(1) (slot 13 = the printSimulationState
state PRINT @004ac8c0, not an "explosion notify"), own private zone pinned
destroyed, then collect the mech DamageZones whose crit entries plug the bin
(the binary filters plug classID 0x4E = DamageZoneClassID -- VDATA.h idx 78,
cross-checked via idx 28 = AudioStateTrigger), split the amount evenly, and send
the OWNER one full Entity::TakeDamageMessage per zone: inflictingEntity = SELF,
damageZone = the zone index, inflictingSubsystemID = the bin (the message-
manager explosion-bundling key, ENTITY3.h's own NOTE), printing the binary's
exact "ammo explosion damaging <zoneName>" @0050df61.
Port shape: Mech::AmmoExplosionFanOut (mechdmg.cpp) behind a databinding bridge;
guarded deviation: zoneCount==0 warns instead of the binary's unguarded divide.
CriticalChain/CriticalEntry stand-ins DELETED from mechrecon.hpp.
VERIFIED LIVE (BT_BAYTEST hook = message 1, the crit-induced arm channel):
scratchpad/baytest.py : arm -> 10s -> "20 rounds x 35 = 700 (type 2)" ->
"ammo explosion damaging dz_ltorso" -> zone cascade -> mech DESTROYED
(authentic death list).
scratchpad/baypurge.py: arm -> eject-hold purge -> "bay fire EXTINGUISHED
(bin empty)", no detonation.
scratchpad/sim3.py : the HEAT route arms organically in combat (overheated
AFC100), detonates "11 x 25 = 275 (type 1)" split across dz_larm + dz_lgun.
BAYBOOM matchlog record added for MP field forensics.
FIX-OF-THE-FIX (caught by the sim3 regression, would have shipped a crash):
MechSubsystem's ReconDamageZone proxy puts structureLevel at OFFSET 0 -- which
ALIASES THE REAL DamageZone's VTABLE POINTER (the private zone is `new
DamageZone`, mechsub.cpp:154; mechsub.hpp:260 documents the alias). My first
DistributeCriticalHit kept the old body's `damageZone->structureLevel = 1.0f`
and OVERWROTE THE ZONE'S VPTR with 0x3F800000; the respawn sweep's virtual
SetGraphicState (vtable+0xC) then called through it -> AV at 0x3f80000c in
RespawnRepair, one frame after a bay-fire death. ALL EIGHT proxy-view sites in
mechsub.cpp swept to the engine view (((DamageZone*)damageZone)->damageLevel
@0x158) -- including two silently-wrong LIVE readers: GetStatusFlags (vptr as
float -> always "intact") and ApplyDamageAndMeasure (the crit cascade's
measure). Ruled out first by evidence: the weapon->bin stamps were all clean
(six stamps, all classID 0xbcb, logged).
#47 (half 1 -- the FIRE ICON): BallisticWeaponCluster::Execute @004c9a38 reads
bin+0x18C = cookOffArmed into the btefire.pcc TwoState, and while armed computes
(Now - cookOffTime)/ticksPerSecond -- the COOK-OFF COUNTDOWN -- into the numeric
beside it. The old reconstruction misread 0x18C as "the reload state" and
bridged the icon to BTAmmoBinFeeding, so it blinked on every feed and never lit
on a bay fire (RajelAran: "it doesn't"). Now driven by the
BTAmmoBinCookOffArmed/CookOffTime complete-type bridges. [T2 -- the data path
is rig-verified; the pixels await the next live session.]
#47 (half 2 -- the ENG-BUTTON FLASH): fully mapped, deliberately NOT built this
session. The authored data SHIPS (BTL4.RES carries exactly one type-31
GaugeAlarmStream); the chain is alarm SetLevel -> gauge-watcher socket ->
Renderer msg 7 -> GaugeAlarmManager::Activate @00448d00 (T0) -> the BTL4
override @004cc148..@004cc2fc (btl4galm.cpp's provenance note claiming "no
override body exists" is WRONG -- corrected in-file) -> LampManager::FindLamp
@00444c80 -> Lamp::SetAlertState @00444e64 (flash counter) -> the L4 flush
@00474e94 emitting flashFast states 0x37/0x13 (== T0 L4LAMP.cpp:234-239).
Missing: the override bodies, the gauge-watcher sender, the aux-button lamps.
3-piece plan in context/open-questions.md.
Also logged: HandleMessage is vtable slot 8/9 in the binary but NON-virtual
across 10 reconstruction classes (bit the BT_BAYTEST hook; typed call used, gap
documented in open-questions).
KB: combat-damage.md (the full cook-off section), decomp-reference.md (the
cluster addresses + the GaugeAlarm/lamp map + BT_BAYTEST env), gauges-hud.md
(the fire-icon correction), reconstruction-gotchas.md #19 (__ftol),
open-questions.md (2 entries), btl4galm.cpp provenance correction.
checkctx CLEAN. 40 LNK2019 unchanged (the two pre-existing families).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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arcattackandClaude Opus 4.8
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7b7d465e5e |
Initial commit: bt411 -- standalone Windows BattleTech (Tesla 4.10 port)
Clean, self-contained extraction of the BattleTech-specific work from the
reverse-engineering workspace -- engine + game + content + build, with nothing
from Red Planet or the raw archive dumps. Builds green (Win32) and runs the
single-player drive->animate->target->fire->damage->destroy loop out of the box.
Layout:
engine/ MUNGA + MUNGA_L4 shared 2007 engine, carrying our BT render/loader
work (bgfload/L4D3D/L4VIDEO: BSL bit-slice decode, LOD/ground/shadow
models) + image codec; the minimal rp/ headers the audio HAL needs
game/ reconstructed BT logic + surviving-original BT source + fwd shims
+ WinMain launcher
content/ full runtime tree (BTL4.RES, VIDEO/, GAUGE/, AUDIO/, eggs, BTDPL.INI)
docs/ format specs + reconstruction ledgers
reference/ raw Ghidra pseudocode (recon source-of-truth) + decomp exporter
tools/ MP console emulator + map/resource scanners
One top-level CMake builds munga_engine lib + bt410_l4 game lib + btl4.exe.
All paths relativized (186 fwd shims + ~437 CMake abs paths -> repo-relative);
DXSDK is the one external, overridable via -DDXSDK. Verified: builds to a
byte-identical 2.27MB exe and runs combat (TARGET DESTROYED, 0 crashes) against
the bundled content.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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