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Gauges: trigger-config joystick is LIVE -- @004c6ee0 is LinkToEntity, not SetColor

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The weapon panel's btjoy trigger-config display (ConfigMapGauge) never rendered
because the reconstruction labelled @004c6ee0 as "SetColor(int)" and, finding no
caller, concluded the gauge was authentically dormant (task #6), gating it
behind a BT_CONFIGMAP dev env.

The user challenged this (the PROGRAM/TRIGGER CONFIG button implies the display
visualizes your config).  Re-verification found the old analysis failed twice:
the "no caller" search looked for direct calls to a VIRTUAL, and its slot math
used the wrong vtable copy.  The real ConfigMapGauge vtable @0051a1b8, matched
against the T0 GaugeBase virtual roster (GAUGE.h), pins @004c6ee0 at slot 9
(+0x24) == GaugeBase::LinkToEntity, and @0x94 is the linkedEntity -- the
Execute gate is "not yet linked", not "disabled".  The engine broadcasts
LinkToEntity(viewpointEntity) to every gauge at viewpoint bind (APP.cpp:1277 ->
GaugeRenderer::LinkToEntity GAUGREND.cpp:3011), arming the gate -- the joystick
DOES render in the shipped game, showing per-trigger mapping state (solid =
mapped, matching the DOSBox reference).

Port fix: SetColor(int color) -> LinkToEntity(Entity*), color -> linkedEntity,
BT_CONFIGMAP dev enable deleted (the authentic path lights it).  Render-verified
with no env override: the joystick + mapped-trigger lamp draw on weapon panels.

KB swept per the correction mandate: gauges-hud.md, decomp-reference.md,
open-questions.md, GAUGE_COMPOSITE.md, VEHICLE_SUBSYSTEMS.md.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-21 08:49:58 -05:00
co-authored by Claude Opus 4.8
parent 77cc62886f
commit 89b4f53046
7 changed files with 55 additions and 34 deletions
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context/decomp-reference.md
+4 -1
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@@ -292,7 +292,10 @@ From the weapon `.SUB` records + the charge-curve `.data` constants (PE-parsed a
MechWeapon defaults destination=&fireImpulse@0x31C per @004b99a8). Subsystem+0x110: 0/-1 config-session
flag written by handler 9 (reader unknown).
- ConfigMapGauge @004c6d80/@004c6f1c: table DAT_00518eb4 = {y,btn} {0x0d,0x45}{0x25,0x46}{0x3d,0x40}
{0x55,0x47}, blit x=0xc; SetColor @004c6ee0 has NO caller (gauge dormant in the shipped build).
{0x55,0x47}, blit x=0xc; @004c6ee0 = the virtual GaugeBase::LinkToEntity override (vtbl @0051a1b8
slot 9 +0x24; @0x94 = linkedEntity, the Execute gate), broadcast at viewpoint bind (APP.cpp:1277 →
GAUGREND.cpp:3011) — the gauge IS live in the shipped build (old "SetColor/no-caller/dormant" claim
was wrong; corrected 2026-07-21).
## 6. Env-var gates (runtime; default OFF unless noted)