An 8-agent decomp-mapping workflow mapped every weapon-family ctor + fire/spawn path
(scratchpad/wave7_maps.txt). KEY IDENTITY CORRECTION via VDATA.h enum (base 3000=0xBB8):
the factory ctor-address comments were right but the built CLASS names were stubs/base --
0xBCD == ProjectileWeapon (was building the base MechWeapon stub)
0xBCE == GaussRifle (NOT MissileLauncher -- was a MissileLauncher stub)
0xBD0 == MissileLauncher (NOT BallisticWeapon -- was a BallisticWeapon stub)
Un-mislabeled + wired via Create<Class>Subsystem bridges (mirroring CreateEmitterSubsystem),
each static_assert-locked byte-exact on the now-locked MechWeapon(0x3F0)/Emitter(0x478) bases:
* ProjectileWeapon (0xBCD, @4bc3fc : MechWeapon, sizeof 0x448)
FIX: AmmoBinConnection was an empty 1-byte struct -> retyped to the binary's 0xC
SharedData::Connection (was making the object 8 bytes short, sliding
MissileLauncher's missileCount off 0x448).
* MissileLauncher (0xBD0, @4bcff0 : ProjectileWeapon, sizeof 0x44C)
FIX: deleted muzzleVelocity (ALIAS of inherited ProjectileWeapon launchVelocity@0x410)
and salvoCount (SHADOW of inherited MechWeapon damageData.burstCount@0x3d4),
keeping the single own field missileCount@0x448.
* GaussRifle (0xBCE, @4bdcb4 : Emitter, sizeof 0x484 = Emitter + Vector3D muzzleVelocity)
DEDICATED bridge (not CreateEmitter): its FireWeapon is a no-op (mov [eax+0x414],0) --
a non-functional weapon in this 1995 build. Also fixed GAUSS.CPP's discharge write
rechargeLevel -> currentLevel@0x414 (the binary writes this+0x414).
Phase A safe-stubs FireWeapon (consume round + recoil, NO spawn): the reconstructed
Projectile (@4be1bc, 0x340) + Missile (@4bf5b4, 0x368) ENTITY classes are NOT spawn-ready
(Entity-base phantom members overflow their New() alloc -> heap corruption; New() takes
(int)this instead of the 0xD4 descriptor; Entity base size unconfirmed 2007-vs-1995, the
Mech 0x638-vs-0x854 problem). The workflow's adversarial verify flagged the live spawn as a
heap-overflow hazard and recommended exactly this phasing. Phase B = the entity byte-exactness
+ descriptor build + New(MakeMessage*) so a fired shot becomes a flying entity that damages.
Factory now 18 of 20 cases wired to real ticking classes (remaining: SubsystemMessageManager
0xBD3 [WAVE 8], Gyroscope 0xBC4 [deferred]). Verified: Mad Cat (LRM/ballistic) + BLH construct
the real weapon classes + tick authentic charge/ammo/heat/recoil, DESTROYED-in-8, 0 crashes,
heapcheck-clean through construction. Energy weapons already damage via the mech4 beam path,
so combat is unaffected.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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>
