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Mech: THE 0xBD3 UNTANGLE -- real SubsystemMessageManager in [0x10d], the mapper's one true home is roster slot 0 (task #7)

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Binary census [T1]: mech+0x434 has exactly 2 writers (ctor init + factory
case 0xBD3) and ONE reader (@0x4b984b in MechWeapon::SendDamageMessage
@004b9728) -- pure message-manager semantics, nothing mapper-like.  The
factory case now builds the real SubsystemMessageManager (ctor @0049bca4,
0x130, ConsolidateAndSendDamage Performance); the misbuilt MechControlsMapper
squatter is evicted.  Every mapper consumer re-pointed to MappingMapper()
(roster slot 0 = the binary's **(mech+0x128); SetMappingSubsystem @0049fe40
touches ONLY slot 0 -- its [0x10d] mirror removed).  Non-viewpoint mechs get
a slot-0 demand LATCH (base mapper, [T3] accommodation -- the binary leaves
slot 0 NULL off-viewpoint but never drives/animates those paths; ours does).
Verified: solo drive+gait clean; MP replicant gait through the latch (full
run lifecycle); 3x kill/respawn cycle with type-6 records on the observer.
Remaining (task #7 tail): the messmgr's consolidated TakeDamageStream send +
weapon-path routing (@004b9728 real body).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-11 14:16:27 -05:00
co-authored by Claude Fable 5
parent 8ed6184d65
commit afefaeece5
7 changed files with 126 additions and 43 deletions
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game/reconstructed/mech.cpp
+32 -10
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@@ -389,6 +389,12 @@ template<class...A> inline void ParseVector(A&&...) {}
template<class...A> inline int ParseJointResource(A&&...) { return 0; }
template<class...A> inline int CreateModelResourceBase(A&&...){ return 0; }
template<class...A> inline void StreamDamageZone(A&&...) {}
// task #7: the factory-case enum under its true name (0xBD3 was mislabeled
// MechControlsMapperID; the mapper never streams).
enum { SubsystemMessageManagerID = 0xBD3 };
class SubsystemMessageManager;
extern Subsystem *CreateMessageManagerSubsystem(Mech *owner, int id, void *seg);
template<class...A> inline void StreamDamageLookup(A&&...) {}
@@ -988,7 +994,7 @@ Mech::Mech(
Wword(0x12e) = (int)((Wword(0xba).max - Wword(0xba).min) * UpdatePositionScale);
Wword(0xbb).field8 += (float)Wword(0x12e);
weaponCount = 0; // Wword(0x112)
controlsMapper = 0; // Wword(0x10d)
messageManager = 0; // Wword(0x10d)
//
// Instantiate one Subsystem per segment, dispatching on its streamed
@@ -1108,10 +1114,14 @@ Mech::Mech(
++weaponCount;
break;
case MechControlsMapperID: // 0xBD3
subsystemArray[id] = (Subsystem *)
new (Memory::Allocate(0x130)) MechControlsMapper(this, id, seg, MechControlsMapper::DefaultData); // FUN_0049bca4
controlsMapper = (MechControlsMapper *)subsystemArray[id]; // Wword(0x10d)
case SubsystemMessageManagerID: // 0xBD3 -> the REAL class (task #7):
// the per-mech damage/explosion consolidation hub (ctor
// @0049bca4, 0x130 bytes, ConsolidateAndSendDamage Performance
// @0049b784). The old MechControlsMapper build here was the
// mapper/messmgr conflation -- the mapper never streams; it is
// installed into roster slot 0 by SetMappingSubsystem.
subsystemArray[id] = CreateMessageManagerSubsystem(this, id, seg); // FUN_0049bca4
messageManager = (SubsystemMessageManager *)subsystemArray[id]; // Wword(0x10d)
break;
case GaussWeaponClassID: // 0xBD4 -> real Emitter (PPC, mislabeled)
@@ -1541,6 +1551,18 @@ Mech::Mech(
}
dir->Add(this); // (**(dir[4]+4))(dir+4,this)
// SLOT-0 DEMAND LATCH (task #7; see BTBuildMapperDemandLatch): every mech
// gets a base mapper in roster slot 0 so the drive harness + replicant
// gait have a demand latch; the viewpoint mech's is replaced by the real
// device mapper (SetMappingSubsystem).
{
extern Subsystem *BTBuildMapperDemandLatch(Mech *mech);
if (GetSubsystemCount() > 0 && GetSubsystem(0) == 0)
{
subsystemArray[0] = BTBuildMapperDemandLatch(this);
}
}
// @0049f788 -- distribute coolant flow across the condensers (post-init pass).
// The real RecomputeCondenserValves; sets each condenser's coolantFlowScale to
// valveState/sum(valveState) so the ValveSetting gauge reads the authentic 1/N
@@ -1877,12 +1899,12 @@ void
Mech::WriteUpdateRecord(Simulation::UpdateRecord *message, int record_type)
{
// The binary stamps *(subsystemArray[0] + 0x128) = the controls mapper's
// speedDemand into every record tail. Our live mapper handle is
// controlsMapper (the [0x10d] cache); replicants have no pilot input.
// (Bridge fn: this TU carries a local recon stub under the mapper's name,
// so the bridge is type-erased; mechmppr.cpp casts to the real class.)
// speedDemand into every record tail -- roster slot 0, the mapper's one
// true home (task #7 untangle; the old [0x10d] cache is the message
// manager). (Bridge fn: this TU carries a local recon stub under the
// mapper's name, so the bridge is type-erased.)
extern Scalar BTMapperSpeedDemandRaw(void *mapper);
Scalar speedDemand = BTMapperSpeedDemandRaw((void *)controlsMapper);
Scalar speedDemand = BTMapperSpeedDemandRaw((void *)MappingMapper());
static const int s_mrecLog = getenv("BT_REPL_LOG") ? 1 : 0;
if (s_mrecLog && record_type != 0)