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HUD reticle + weapon pips LIVE: dpl2d 2D display-list port (task #35)

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- dpl2d API fully recovered from the binary recorders (@487f34-488630):
  opcode model (points/lines/polyline/circle/color/width/matrix/push-pop),
  CallList = INLINE include (state persists to caller), centered coordinate
  frame (unit = half viewport height). game/reconstructed/dpl2d.cpp rework.
- BTReticleRenderable ctor @004cc40c transcribed with the authentic
  calibration (originX .35, originY .25, scaleY .5, 0..1200m right range
  ladder, bottom heading tape, FUN_004cd938 tick ladders, lock rings,
  turn arrows); range caret slides from the live target range fed by the
  mech4 targeting step (BTSetHudTargetRange).
- Weapon pips: the binary gate is IsDerivedFrom(0x511830 =
  MechWeapon::ClassDerivations) [T1: part_014.c:5386 hard-aborts on missing
  weapon attrs; part_012 counts + roster ORs capabilityFlags@+0x334] so ALL
  7 BLH weapons register (3 lasers + 2 PPCs + 2 MissileLaunchers). Pip A
  (lit, authored PipColor) on TargetWithinRange, else dark ring B.
- AddWeapon @004cdac0 store map corrected to the verified order
  (part_014.c:4827-4837); both state attrs are literally named
  "SimulationState" (strings @51d526/51d577) -> weapon simulationState.
- Mech roster this[0x1ef] renamed poweredSubsystems -> weaponRoster
  (0x511830 is MechWeapon, not PoweredSubsystem=0x50f4bc); derivation-tag
  table added to context/decomp-reference.md.
- Draw hook BTDrawReticle after the 3D scene, cockpit view only. Binary
  Execute @004cdcf0 is an un-exported gap -> Draw dynamics [T3], tracked
  in context/open-questions.md with the blx_cop canopy + PNAME pip meshes.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-08 20:05:44 -05:00
co-authored by Claude Fable 5
parent 1cd8ca1a80
commit 48b17750e5
15 changed files with 593 additions and 109 deletions
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context/decomp-reference.md
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@@ -77,6 +77,18 @@ Identify a class at runtime with `sub->GetClassID()` (== `sub+4`). [T1]
- **Heat leaf:** `PoweredSubsystem : HeatSink : HeatableSubsystem : MechSubsystem` (Emitter/PPC/Sensor/Myomers/weapons chain here). [T1]
- **Watcher branch:** `Torso/Gyroscope/Searchlight/ThermalSight/HUD : PowerWatcher : HeatWatcher : MechSubsystem`; `AmmoBin : HeatWatcher`. Uses a 0xC connection + 0x54 alarm (NOT the 4/8-byte heat-leaf types). [T1]
### Derivation-tag addresses (`FUN_0041a1a4(obj, tag)` = IsDerivedFrom)
| Tag | Class | Evidence |
|---|---|---|
| **0x511830** | **MechWeapon**::ClassDerivations | The reticle AddWeapon loop (part_014.c:5386) hard-aborts on missing WeaponRange/PipPosition/… attrs for every member; part_012.c:9344 counts ready weapons; the Mech ctor roster at this[0x1ef] (`weaponRoster`, ex-mislabel "poweredSubsystems") ORs weapon `capabilityFlags`@+0x334. [T1] |
| 0x50f4bc | PoweredSubsystem | btl4gau2 gauge wave. [T1] |
| 0x50e3ec | HeatableSubsystem | btl4gaug widget gate. [T1] |
| 0x50e604 | HeatSink | btl4gaug widget gate. [T1] |
| 0x51155c | roster at Mech this[0x1eb] (`heatableSubsystems` label) | tag ≠ 0x50e3ec — the label is UNVERIFIED [T4]; arbitrate before relying on it. |
| 0x50e4fc | roster at Mech this[499] (`damageableSubsystems` label) | [T3] |
| 0x50bdb4 | Mech | emitter.cpp destroyed-check. [T1] |
| 0x5121a8 | ProjectileWeapon-family (checked after 0x511830; reads ammo state @+0x364) | [T3] |
---
## 3. Mech struct offsets (`Mech*`, binary layout)