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PPC hit scrambles the secondary displays (phase-14, all three work items)

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Restores the PPC's authentic secondary-display effect: an EnergyDamageType hit
scrambles every secondary cockpit display for 0.8s while the main out-the-window
view stays clean.  Was fully specced (phase-14) with the engine half already
present under the original VWE names; only the trigger and the visual were
missing (the visual STUBBED since 2007).

A -- TRIGGER (game/reconstructed/mech.cpp): in TakeDamageMessageHandler, at the
  binary's @0x4a03f3 position (after the cylinder resolve, before the burst
  loop, so ONCE per damage message) fire
  GetGaugeRenderer()->SpecialEffect(scrambleVideo, damageType*0.2f) on
  EnergyDamageType (==4).  That type is authored on exactly the 14 PPC/ERPPC
  records, so the branch is structurally PPC-exclusive -- no weapon-class check.
  Duration DERIVED from the ordinal (4*0.2==0.8s), not a literal.  BT_DMG_LOG
  prints [ppc-scramble].

B -- VISUAL (SVGA16::FunkyVideo, was the 2007 stub): FunkyVideo now arms
  scrambleActive; new SVGA16::ScrambleRowShift is a per-source-row horizontal
  shear+roll, read by BOTH DrawDevSurface (surround/dock) and ExpandPlaneToBGRA
  (glass windows, native + rotated radar), so all secondary surfaces shear
  together in source space and the main 3D view (separate timing chain) is
  untouched -- the modern stand-in for the VGA CRTC Horizontal-Total detune.
  Tunable: BT_SCRAMBLE_SHEAR (px/line, def 4), BT_SCRAMBLE_ROLL (px/sec, def
  220); BT_SCRAMBLE_TEST=1 forces it on for tuning by eye.

C -- NON-STACKING LATCH (L4GaugeRenderer::SpecialEffect): ignore the re-arm while
  scrambleVideoFlag is set (matches the binary's `modified` latch) -- a second
  PPC during the window no longer extends it.  Was a divergence.

Verified: Release links clean; surround boots + runs with the effect forced on,
every secondary MFD + the radar shear while the out-the-window view stays clean,
no crash (screenshot).  Open (for the playtesters who filed the report): live
PPC-fire confirmation + by-eye shear tuning -- k/roll are not recoverable from
the binary.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Cyd
2026-08-06 16:19:10 -05:00
co-authored by Claude Opus 4.8
parent 1164098d61
commit 74a0db4edd
7 changed files with 155 additions and 22 deletions
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@@ -645,7 +645,7 @@ Total by −9** for 0.8 s — every secondary cockpit display loses horizontal s
is untouched. `EnergyDamageType` is authored on **exactly the 14 PPC/ERPPC records and nothing
else**, so this is structurally PPC-exclusive. It fires **once per damage message** (outside the
burst loop). Full chain + addresses: [[gauges-hud]] §"PPC HIT = a deliberate CRTC horizontal-sync
DETUNE"; port spec: `phases/phase-14-ppc-sync-distortion.md`. **Not yet implemented.**
DETUNE"; port spec: `phases/phase-14-ppc-sync-distortion.md`. **Implemented 2026-08-06** (branch `ppc-sync-distortion`).
## (HISTORICAL — the gap as found 2026-07-29, superseded above) [T1]
The authored crit machinery exists and is reconstructed — `Mech__DamageZone::CriticalHit @0049ccc4`