# MECHWEAP.CPP / .HPP — reconstruction notes

`MechWeapon` (: PoweredSubsystem) is the weapon base: PPC/GaussRifle bind it via
Emitter, the SRMs via ProjectileWeapon/MissileLauncher. The resource streams
rechargeRate / weaponRange / damage / heatCostToFire (+ pip fields).

## Reconstructed

- Statics (ClassDerivations, DefaultData on Subsystem::MessageHandlers/
  AttributeIndex), ctor streaming the tuning fields, damageData prime.
- **View-fire gating (2026-07-21, the look-commit wave):** real `rearFiring` /
  `viewFireEnable` members (1995 binary @0x334/@0x3E0) + `IsRearFiring()` /
  `GetViewFireEnable()` / `SetViewFireEnable()`. The ctor resolves REAR-FIRING
  authentically (binary ctor tail @004b99a8): the mount SEGMENT site name
  (`owner->GetSegment(GetSegmentIndex())`) is tested for the 'b' (back) marker —
  only the back gun ports (`sitelbgunport`/`siterbgunport`) carry it. Spawn
  state = armed for the forward view. `Mech::CommitLookState` re-arms on every
  view change (see MECH.NOTES.md increment 7). Verified: the TEST.EGG mech's
  two rear lasers (ERMLaser_2/3) arm only in LOOK-BACK.

## Still staged

- `FireWeapon` (abstract here; the concrete fire paths in Emitter/PPC/Gauss/
  MissileLauncher are the combat wave), `SendDamage` (damage/networking),
  `CreateStreamedSubsystem` (tool-side model build).
- The 1995 MechWeapon attribute table (RearFiring @0x1B, EstimatedReadyTime,
  ...) is not yet published — our DefaultData still uses the base
  Subsystem::AttributeIndex. Comes with the weapon-gauge/console wave.
- ~~`MechWeapon::MessageHandlers` declared but not defined~~ — **FIXED
  2026-07-21**: it is now a real defined set (`(0, NULL,
  Subsystem::MessageHandlers)` — no own handlers yet, inherits the chain), and
  `MechWeapon::DefaultData` binds it. This mattered because the surviving CODE
  PPC.CPP binds the inherited name (`PPC::MessageHandlers`) into
  PPC::DefaultData, and a declared-but-undefined static links as a zero-filled
  common block — the same silent-NULL trap as the Emitter::AttributeIndex
  crash. Real weapon handlers (fire/damage messages) come with the combat wave
  (grow the table in place).