The SubsystemCluster per-weapon MFD panels render two image-strip lamps in
the TEMP/STATUS area: the cooling-loop number (btploop, 1..6) and the
generator letter (btpbus, A..D). Both drew as completely empty boxes.
Three stacked databinding bugs, all now fixed:
1. Color drop (btl4gau2.cpp): AnimatedSubsystemLamp/AnimatedSourceLamp
ctors dropped the bg/fg color params the binary passes (bg=0xff,fg=0,
same as the neighboring temp bar) and hardcoded 0,0 -> OneOfSeveral::
Execute did SetColor(0)+DrawBitMapOpaque(0), i.e. black-on-black.
Restored 0xff,0 (verified vs @004c70a4 / caller SubsystemCluster
@004c8140).
2. Shadow-field trap (btl4gau2.hpp, gotcha #2): both lamp classes
re-declared `int selected;` while already inheriting it from
OneOfSeveral (@0xAC). The CoolingLoop/PowerSource connection wrote the
derived shadow copy while OneOfSeveral::Execute read the base @0xAC
(always 0) -> every lamp stuck on frame 0 ("OFF"). Removed the
redeclarations so &selected binds the inherited member. Loop numbers
now render (verified: PPC->4, Myomers->5, ERMLaser->1/6, etc.).
3. Attribute-table shift (powersub.cpp + btl4gau2.cpp, gotcha #8): the
generator-letter lamp resolved its source via
ResolveLink(AttributePointerOf(subsystem,"InputVoltage")), but the
BT_DEV_GAUGES audio attribute rows shifted the chained attribute ids so
AttributePointerOf no longer landed on voltageSource@0x1D0 -> the link
always resolved to 0 (OFF) even though the master PoweredSubsystem ctor
DID bind voltageSource to its Generator. New BTPowerSourceFrame bridge
reads the NAMED member via PoweredSubsystem::ResolveVoltageSource() and
returns Generator::generatorNumber (@0x1E0), bypassing the attribute
table -- the same pattern as the BTCoolingLoopFrame fix. Generator
letters now render (verified: PPC_1->GeneratorA="A", Myomers->
GeneratorD="D", SRM6->GeneratorB="B").
Result: the "4 A / 1 B / 5 D" boxes render with both the loop number and
generator letter, matching the reference. Kept BT_LOOP_LOG-gated
[loopfeed]/[busfeed] feed diagnostics; both pod + glass builds clean.
Awaiting live playtest verification.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
