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Commits
| Author | SHA1 | Message | Date | |
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 arcattackandClaude Fable 5
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48c9c8444f |
Fire VISUALS wave: the authored firesmoke sheet, vertex-alpha effect cards, the case-4 wreck dressing
The "fireballs like the demo vids" arc, decomp/content-grounded end to end,
plus the live-play UX batch verified over the same sessions:
FIRESMOKE SHEET (the PFX fireball fix): every firesmokeN_scr_tex in BTFX.VMF
maps the SAME 64x64 tileable noise image bintA (variants differ only in SCROLL
rate) and firesmoke1_mtl colours it through the "fiery" ramp (0.3,0.1,0.1)->
(0.9,0.7,0.3). The particle layer now bakes ramp(lum(bintA)) as its sprite
colour (noise detail in alpha) and SCROLLS it at firesmoke1's authored rate
via a texture-transform; the port's radial soft-edge mask moved to a second
CLAMPed stage so the WRAPPED scroll rolls flame through the sprite without
scrolling the edge away. Old grit x radial bake kept as the no-BINTA fallback.
Impact hits, damage-band smoke and death booms all ride this layer.
AUTHORED TEXTURE SCROLL in the model path: the BMF TEXTURE records carry
SPECIAL " SCROLL u0 v0 du dv" (tag 0x2037); the draw path always supported
per-op scrolling (SetTextureScrolling) but the BGF loader never parsed it, so
every scrolling material rendered frozen. Wired TexRef -> MatInfo -> batch ->
L4TEXOP.doScroll: the flame cards (flamebig/fire5) now roll fire noise.
VERTEX-ALPHA EFFECT CARDS (the "twisted drill bit of fire" fix): FLAMEBIG's
verts carry authored float RGBA -- white-hot base (1.0,0.99,0.97) -> dark-red
tip fading to alpha -0.2 (the DPL clamp convention). The loader kept a flat
batch colour and drew it OPAQUE = a solid orange spike. Corpus sweep: exactly
14 shipped BGFs carry vertex alpha, ALL effect cards (flames, MUZFLASH,
EXDISK_A/B/C, TMST_A/B/C, beam models, DECLOUDS). Such batches now keep the
authored per-vertex gradient and route to the alpha-blend pass, unlit,
colour = texture x gradient, alpha = the vertex fade; sky objects excluded
(drawAsSky + alphaTest passes NEITHER pass filter -- DECLOUDS stays in the
sky pass). MUZFLASH/EXDISK render correctly for free when the muzzle-model
work lands.
WRECK DRESSING (the 1996 ExplosionScripts case-4 transcription): pieces spawn
HIDDEN and reveal 0.25s after the boom (the InstanceSwitch delay, behind the
dnboom flash); flamebig hangs over the pile, Y-BILLBOARDED at the camera
(SetOffsetYaw + a camera-pos getter -- the dpl_SetDCSReorientAxes analog);
the MakeDCSFall settle arms at the reveal with the two authored rates (hulk/
debris -0.025 t^2, fires -0.01 t^2 -- the flames ride above the sinking pile
and die with it at burial). EMPTY-PLACEHOLDER hulk guard: THRDBR.BGF is a
153-byte zero-geometry stub that "loads fine" -- vertex-count check now routes
it to the gendbr fallback (a Thor wreck was invisible). Hulk content census
recorded: AVADBR==MADDBR==VULDBR geometry (palette-only prefix diffs),
RAPDBR==SNDDBR==STIDBR byte-identical -- wreck variety is materials + the
dressing, not unique piles.
LIVE-PLAY BATCH: muzzle resolve uses the named segmentIndex (raw +0xdc read
was layout garbage); forward launch frame (authored MuzzleVelocity +Z vs the
mech's -Z facing); dock-bottom single window (gauge strip appended below the
world viewport, 1100x600 default, BT_DEV_GAUGES_WINDOW=1 restores the separate
window); portrait sec surface unrotated CW; ammo counters live via typed
bridges (BTAmmoBinCountPtr/BTAmmoBinFeeding/BTWeaponAmmoBin -- raw bin+0x180
and a hand-rolled link walk were garbage); fourth fire key ('4' = Pinky);
panel/arc probes de-aliased (%61 prime).
KB: rendering.md (vertex-alpha card family + scroll), combat-damage.md (hulk
census + THRDBR stub), gauges-hud.md (ammo bridges).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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arcattackandClaude Fable 5
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8af278a3f5 |
Cockpit: unlit map-independent frame colour (task #55)
User report from the MP/cavern session: the canopy frame rendered flat light gray -- unlike the dark frames in the polar exports. Root cause: the frame colour was routed through the LIT material path (Diffuse+Ambient), so it multiplied with each map's lighting -- polar's dim purple light happened to look right, cavern-night's ambient 0.8 washed it out to gray. The canopy is unlit interior structure: the frame batches now go through the renderer's pure-emissive UNLIT branch (black diffuse + emissive = the frame colour), constant on every map. The exact original value is not recoverable (texture-less ramp = no texel luminance to index); default (0.13,0.12,0.15) [T3] matches the near-black frame in pod gameplay footage. BT_COP_FRAME="r g b" overrides; BT_COP_RAMP_L retired. Verified: cavern-night and polar-day now show the identical dark frame. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> |
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arcattackandClaude Fable 5
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96b8892e7c |
Cockpit: the authentic punch STENCIL-CUT -- all 8 cockpits real (task #55)
The user caught the inversion (blocked viewports, see-through frames); the
answer came from the rasterizer board itself: an i860 disassembly of the
VREND.MNG firmware decoded the damageize handler (@0xf040f6f8) -- cmd 0x20
(vr_damage_action) writes the dpl_Punchize token triple onto the punch
geogroup's first three geometry chunks IN FILE ORDER:
chunk1 = the detailed window-aperture shapes -> an invisible per-pixel MASK
chunk2 = the coarse hull -> the ONLY colour-drawn geometry (where not masked)
chunk3 = byte-identical hull twin -> the damage-reset record, never visible
Visible canopy = hull-minus-apertures. Both earlier readings were wrong ways
around the same three chunks: dropping all punch left floating fragments (no
hull); hiding the duplicate pair hid the HULL and drew the MASK -- the exact
inversion observed.
Port: bgfload tags per punch patch {non-paired pmesh = mask (role 1),
first twin = hull (role 2), second twin = skip}; L4D3D DrawMesh runs
mask->stencil-1 (no colour/z-write, z-tested), hull->stencil-NOTEQUAL,
mask->stencil-0; device D24X8 -> D24S8 + stencil clear. The cut never
touches z, so later-drawn entities show through the apertures.
BT_COP_PLATES=1 disables (diag).
In-game, all 8 mechs on pure defaults: connected dark frames with clear
viewports -- thor (the footage mech) shows the central viewport + surrounding
frame exactly as filmed. Combat regression clean (kill + no NaN).
Arena textured punch uses the same firmware kit; the black-texel alpha path
there is a working approximation, flagged in the KB.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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arcattackandClaude Fable 5
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8431e69b1a |
Cockpit: duplicate damage-plate rule -- connected frames on 7/8 mechs (task #55)
The user's observation was right twice over: cockpit elements can't float
disconnected, and the missing punch geometry is STRUCTURE, not glass. The
TRICODER.H decode (dpl_Punchize tokens = {dmg_set, undmg2enbl|texture,
dmg_clear}) shows PUNCH marks geometry for the board's per-triangle DAMAGE
machinery -- battle damage punches holes through it; undamaged it renders
opaque.
The per-mesh discriminator: every *_cop PUNCH patch contains exactly one pair
of BYTE-IDENTICAL duplicate PMESHes -- solid damage-state cover plates, not
visible undamaged structure. Rendering them was the "solid black canopy";
dropping whole punch patches left the floating fragments. The loader now
hides just the within-patch duplicate pairs (FNV hash over the raw pmesh
chunk; BLX duplicates its main lattice ACROSS patches, so cross-patch copies
stay) and renders the rest of the punch lattice opaque, DOUBLE-sided (the old
single-siding + per-face inward winding existed only to fight the plates'
black box; with the plates hidden it was moot and its centroid heuristic was
fragile on the tight canopies -- removed). BT_COP_PLATES=1 shows the plates,
BT_COP_SINGLE=1 restores single-siding (diag).
In-game on pure defaults: madcat dome + connected framed cockpits with window
apertures on bhk1 / owens / sunder / vulture / avatar. Residual: thor + loki
still show an oversized central block vs the offline authored-eye prediction
-- under investigation.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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arcattackandClaude Fable 5
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8057c37e5b |
Cockpit: punch patches ARE the windows -- all 8 mechs authentic (task #55)
Resolved the non-Madcat blocked views. Rendering every *_COP shell offline from its mech's AUTHORED eye (SKL [jointeye] translation -- incl. the Thor's +1.13 offset cockpit) with faces coloured by punch flag showed the answer plainly: the PUNCH-tagged patches sit exactly over the window apertures in all 8 mechs. On these texture-less black-diffuse shells dpl_Punchize renders the tagged geogroup as holes -- the punch patches are the transparent WINDSHIELDS, and the visible frame is only the non-punch geometry. The loader now drops the punch batches of _cop meshes (bgfload finish(); BT_COP_KEEPPUNCH=1 keeps them for diagnosis). In-game sweep on pure defaults: - madcat: the dark dome frame (matches gameplay footage) - thor / owens / sunder: authentic brace/dash/pillar remnants - bhk1 / loki / vulture / avatar: authentically FRAMELESS (all-punch canopies -- the pod showed no frame for those mechs) (An early-session test that "disproved" drop-punch ran with the broken pre-inverse eye; its conclusion was wrong and is corrected in the KB.) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> |
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arcattackandClaude Fable 5
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abaa145b6f |
Cockpit: authentic eyepoint + canopy lattice render (task #55)
The first-person cockpit now shows by default and matches gameplay footage (verified on the Madcat). Two decomp-verified reconstructions: EYEPOINT (FUN_004579a8 + caller part_014.c:5525, FUN_004c22c4): - eye offset = siteeyepoint GetBaseOffset (not GetSegmentToEntity, not the upright hack), parented on the PARENT segment DCS (btl4vid.cpp) - live view = affine INVERSE of the eye world matrix (L4VIDRND Execute) -- replaces the hand-rolled LookAtRH whose +Z-forward/+Y-up row guess aimed some mechs into the canopy; combine order fixed to baseOffset * R - chase camera basis + aim boresight re-expressed for the inverse convention (row2 = back); boresight now derives from the view matrix (the stale rows aimed the pick ray at the sky = no target, no discharge) CANOPY (*_COP.BGF, dpl_Punchize geogroups): - every shell is an open strut lattice (38-59% boundary edges, all 12 mechs); rendered single-sided with per-face INWARD winding (l/r torso patches are mirrored, so no global winding works) the struts are the dark frame and the openings show the world - frame colour = the 'softer' ramp near its dark end (texture-less unlit ramp; BLXSKIN.BMF has no texture -- the old "punch texels" theory was wrong) - scoped by filename (meshIsCop); wrong drop-punch + view-cut paths removed - BT_FORCE_MODEL=<name> forces the player mech for per-mech bring-up KB: new context/cockpit-view.md topic; punch split corrected in bgf-format; gotchas 14 (LookAt axis guess) + 15 (per-patch edge namespaces); env gates + eye/punch addresses in decomp-reference. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> |
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arcattackandClaude Opus 4.8
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0bfb3d4ab3 |
Warp: restore the translocation-vortex look + fix texture-scroll precision collapse (task #52)
The death/respawn "blue whirlwind" (tsphere) now matches the original cabinet
photo (capture.png): a smooth spinning lavender vortex with a bright core.
Root cause of the long-standing "radial spokes" artifact was NOT the warp code
but a general engine bug: L4D3D::SetTextureScrolling computed its texture-matrix
offset as scrollDelta * absolute_time, which grows unbounded and collapses UV
float precision -> a smooth scrolled cloud shatters into grainy radial steps.
Wrapped with fmodf(..., 1.0f) (identical under REPEAT tiling, full precision).
This also cleans the scrolling bexp beam grit and any other SCROLL material.
Visual reconstruction (verified against the real 45-vtx TSPHERE.BGF bicone,
offline-rasterized then ported):
- view ON-AXIS (eye centred on the throat) + spin in place -> concentric rings
(decomp FUN_00453dc4 does spin-about-local-Z + submit; the port had stubbed it)
- bintA cloud through a WIDE lavender ramp at full contrast (drawn as SKY);
no geometry "bands", no log-polar twist, no off-axis tornado (all discarded)
- tessellate the 12-facet bicone smooth; isotropic + trilinear; ramp baked into
the texture and drawn SELECTARG1(TEXTURE) to avoid double-tinting
Env knobs (BT_WARP_*) default to the verified values; BT_WARP_SELFTEST/SELFSHOT
are an off-by-default visual-verification harness (backbuffer frame dump).
Docs: new context/translocation-warp.md (geometry/material/visual/lifecycle/env);
reconstruction-gotchas.md gains the accumulated-time precision-collapse bug class;
rendering.md / multiplayer.md / decomp-reference.md / CLAUDE.md cross-linked.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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arcattackandClaude Opus 4.8
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a9d1534292 |
Warp: faithful POVTranslocateRenderable -- eye-centered, ramp color, no spin
Deep-dived the authentic engine effect (L4VIDRND.cpp POVTranslocateRenderable, T0)
and reworked our one-shot to match it, fixing the user's "blob from my own POV /
not aligned to my orientation" + "gray, not blue" reports:
1. PLACEMENT was the misalignment. The engine parents the sphere to the VTV/eye
("rotated and scaled around the VTV", L4VIDRND.cpp:1812) -- it is centered on and
oriented to the viewpoint. We world-fixed it at the mech's feet, so from your own
camera it sat off-axis and, once expanded, engulfed the eye as a shapeless blob.
Now: the own-respawn warp (BTStartWarpEffectPOV, from btplayer) uses
world = Scale(s) * inverse(view) -> centered on + carried by your eye (the tunnel
wraps you). Observing a PEER (BTStartWarpEffect from mechdmg) stays world-anchored
at the peer's point.
2. GEOMETRY SPIN was inauthentic. myRotateY/myRotateYSpeed are set in the engine
ctor but NEVER applied -- the swirl's rotation is entirely the material's texture
SCROLL (bintA, SCROLL 0.0 0.0 0.1 0.5). Dropped our world-Y geometry spin.
3. COLOR (gray) fixed at the source. The blue/white is the "sky" RAMP remapping the
grayscale bintA cloud per-texel (argb=lerp(0,0,0.6 -> .99,.99,.99, luminance),
L4D3D.cpp:480). The port bakes exactly this but GATED it off for normal-bearing
meshes; tsphere has normals so it arrived raw gray, and a MODULATE tint can't add
the blue floor (it only multiplies) -> the wash-out. Un-gate the ramp for
tsphere_mtl (bgfload.cpp) so the bound texture is already the blue-white swirl;
draw it MODULATE by white (no tint), alpha from TFACTOR.
4. SCALE to authentic 100 (collapse) / 150 (expand end) -- correct now that it's
eye-centered (you're meant to be inside it as it collapses through you and blasts
back open, the "blast off into the distance").
Still deferred (higher risk / SimulationState-coupling trap): the WaitForReincarnate
Lissajous wobble + the SetIsDead world-mask (black-out during the dead hold). Noted
for follow-up; the placement/color/motion are the parts the user flagged.
Smoke-verified 2-node: own respawn logs POV(eye), observer logs world-anchored, no
crash. BT_WARP_ADDITIVE / BT_WARP_COLOR / BT_WARP_SCALE remain as live tuning knobs.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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arcattackandClaude Opus 4.8
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7b7d465e5e |
Initial commit: bt411 -- standalone Windows BattleTech (Tesla 4.10 port)
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>
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