Root-caused why the radar showed 0 contacts: the gauge renderer's moving/static
entity grids (queried by GetMoving/StaticEntitiesWithinBounds) were NEVER
populated -- the 1995 game fed them from ExecuteImplementation's InterestingEntity
iterator, which the WinTesla port dropped.
Fix (engine): add GaugeRenderer::RebuildEntityGrid() -- Clear + repopulate
movingEntities from the world's DynamicMaster + DynamicReplicant entities (the
vehicles/mechs; AllEntity would flood the grid with ~300 props/effects/terrain).
Called from the map's Execute phase 0 (under the gauge's guarded Execute, so a
fault disables only the map). Verified: contacts are now found, combat un-
regressed (TARGET DESTROYED), heap-clean under BT_HEAPCHECK.
Fix (map): DrawMoving now draws a cross blip for mech-class contacts (0xBB9) when
the authentic pip raster set is absent (the BT pip table is stubbed in this engine
build). KEY PROJECTION FIX: worldToView is a camera (view->world) matrix and
Point3D::Multiply applies only rotation+scale (NOT translation), so projecting the
absolute entity position left the viewpoint un-subtracted and the blip landed
off-screen (verified: blip @(580,-1154)). Project the RELATIVE position (delta =
entity - viewpoint, already computed for the range check) instead -> the blip
projects viewpoint-relative + heading-rotated correctly (@(164,221)).
radarRange default 500->1000 (1km zoom) so contacts within ~500m show on the
radar (SetTargetRange, the real player zoom, is still stubbed). BT_MAP_LOG traces
the blip coords.
STATE: the grid population + viewpoint-relative blip projection are correct and
combat-safe. A reliable on-screen contact demo still needs the display-scale vs
spawn-distance reconciliation (the BT_SPAWN_ENEMY dummy sits at a varying, large
distance -- 377-828m -- beyond the display radius across runs) + the authentic pip
symbol/name/video-object infrastructure (still stubbed).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Reconstructs colorMapperMultiArmor -- tints one schematic colour (a whole torso
section) by the WORST of up to 8 damage zones:
- MultiArmorConnection (@004c346c/@004c34f4): scans 8 zones via
entity->damageZones[idx], keeps the max damageLevel, count==0 ? 100 :
Round(worst*100).
- ColorMapperMultiArmor::Make/ctor (@004c3c48/@004c3d60): resolves 8 named
zones to indices via Entity::GetDamageZoneIndex (13-param methodDescription).
ALSO fixes a latent HEAP CORRUPTION that registering this widget exposed (and
that would have blocked every further widget): GaugeInterpreter's bytecode
buffer is a fixed interpreterTableSize=46864 (GAUGREND.h) tuned for RP's config,
and its Insert() bounds guard is a Verify() that compiles out at DEBUG_LEVEL 0.
As each BT gauge widget is registered, more of BT's larger L4GAUGE.CFG resolves
into bytecode (vs being parse-skipped); colorMapperMultiArmor's 13 params x
hundreds of calls pushed the total past 46864 -> silent overflow past the char[]
-> heap smash detected later in mission bitmap loading (not the gauge code).
Fix: interpreterTableSize -> 262144 (sized for BT's full config).
Verified: parses, builds, all zones resolve, no /FORCE unresolved, combat
un-regressed (TARGET DESTROYED, 0 crashes), stable. Details: docs/GAUGE_COMPOSITE.md.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Clean, self-contained extraction of the BattleTech-specific work from the
reverse-engineering workspace -- engine + game + content + build, with nothing
from Red Planet or the raw archive dumps. Builds green (Win32) and runs the
single-player drive->animate->target->fire->damage->destroy loop out of the box.
Layout:
engine/ MUNGA + MUNGA_L4 shared 2007 engine, carrying our BT render/loader
work (bgfload/L4D3D/L4VIDEO: BSL bit-slice decode, LOD/ground/shadow
models) + image codec; the minimal rp/ headers the audio HAL needs
game/ reconstructed BT logic + surviving-original BT source + fwd shims
+ WinMain launcher
content/ full runtime tree (BTL4.RES, VIDEO/, GAUGE/, AUDIO/, eggs, BTDPL.INI)
docs/ format specs + reconstruction ledgers
reference/ raw Ghidra pseudocode (recon source-of-truth) + decomp exporter
tools/ MP console emulator + map/resource scanners
One top-level CMake builds munga_engine lib + bt410_l4 game lib + btl4.exe.
All paths relativized (186 fwd shims + ~437 CMake abs paths -> repo-relative);
DXSDK is the one external, overridable via -DDXSDK. Verified: builds to a
byte-identical 2.27MB exe and runs combat (TARGET DESTROYED, 0 crashes) against
the bundled content.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
