Searchlight beam: the btfx brighten material class + BT_SPOT_SELF rig
SPOT.BGF decoded: a 7-vert cone from the mount, ~50u forward and ~35deg DOWN
(a ground-pool lamp, not an air beam), verts tinted cyan-white, material
class 'brighten' smuggling its additive factor in DIFFUSE.r (0.25) with a
warm emissive on the night page. The loader had never met the class -- it
drew as an opaque dark-red blob. Now: brightenFactor parsed (name-gated to
brighten*), batch -> L4DRAWOP.brightenAlpha, drawn in the blend pass as an
additive veil (dest += vertexRGB x factor), unlit. [T3] tint compose
(vertex cyan vs night emissive warm) noted in the draw branch -- field
eyeball accepted the current look.
BT_SPOT_SELF=1 (bench-only): builds the cone on the own-cockpit tree so the
BT_CAM=face view can inspect it solo. KB: view toggle is BACKTICK ('V' is
the rear-view hold since #68 -- the toggle skips bound keys); stale V-toggle
claims swept.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Joe DiPrima
co-authored by
Claude Fable 5
Claude Fable 5
parent
7d8f109241
commit
b75bb4a04c
@@ -278,7 +278,7 @@ no-arc). The old hardwired lock, the ±30°-default cone, and the projectile pat
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fallback are all REMOVED. LMB fires lasers / RMB missiles (with SPACE/CTRL). ⚠ A view-selection
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bug was fixed en route: every
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renderable rebuild stomped `mCamera` back to the chase eye (btl4vid `mViewInside` now persists
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the chosen view — the aim camera feed and the V toggle both depend on it).
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the chosen view — the aim camera feed and the view toggle (backtick since task #68 took 'V' for rear-view) both depend on it).
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**WORLD STRUCTURES ARE TARGETABLE via the STATIC COLLISION TREE (task #50, 2026-07-15) [T2].**
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The `BTGroundRayHit` "terrain" tier only samples the VISUAL heightfield, which on arena1 is a
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@@ -553,7 +553,7 @@ default-ON (`'0'` disables).
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| `BT_AIM="x y"` | pin the reticle crosshair (reticle coords) — headless aim harness |
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| `BT_AIM_LOG` | `[pick]` ray/box/hit diagnostics (Mech::PickRayHit) |
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| `BT_FIRE_ARC=<deg>` | OPT-IN external-camera fire-arc clamp (unset = authentic no-arc) |
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| `BT_START_INSIDE` | begin in the cockpit view (V toggles) |
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| `BT_START_INSIDE` | begin in the cockpit view (BACKTICK toggles; 'V' = the pod rear-view hold since #68 — the toggle skips bound keys, L4PADRIO.cpp:681) |
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| `BT_FORCE_MODEL=<name>` | force the player mech (`madcat`/`owens`/…; btl4mssn.cpp — per-mech cockpit bring-up) |
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| `BT_HIDE_COCKPIT` | hide the `*_cop` canopy shell (SHOWS by default — see [[cockpit-view]]) |
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| `BT_COP_*` / `BT_EYE_FWD=<f>` | cockpit canopy + eye diagnostics (`FRAME` (unlit frame colour override, default 0.13,0.12,0.15) / `SINGLE` (single-sided diag; double-sided is default) / `PLATES=1` (disable the punch stencil-cut kit) / `FLIP` / `DEBUG` / `DUMP`; eye forward-push probe) — [[cockpit-view]] |
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@@ -443,8 +443,13 @@ d3d_OBJECT* d3d_OBJECT::LoadObjectBGF(LPDIRECT3DDEVICE9 device, char *fileName)
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// drawAsSky) and vanishes -- DECLOUDS carries vertex alpha but must
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// stay in the sky pass.
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const bool vtxAlphaOp = data.batches[i].vertexAlpha && !isSkyObj;
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object->mDrawOps[i].alphaTest = (object->mIsShadow != 0) || vtxAlphaOp;
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// BTFX brighten veil (spot cone): route to the blend pass like the
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// vertex-alpha cards; the draw-state branch in DrawMesh adds
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// dest += emissive x factor instead of SRCALPHA/INVSRCALPHA.
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const bool brightenOp = data.batches[i].brightenFactor > 0.0f && !isSkyObj;
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object->mDrawOps[i].alphaTest = (object->mIsShadow != 0) || vtxAlphaOp || brightenOp;
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object->mDrawOps[i].vertexAlphaBlend = vtxAlphaOp;
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object->mDrawOps[i].brightenAlpha = brightenOp ? data.batches[i].brightenFactor : 0.0f;
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object->mDrawOps[i].drawAsDecal = false;
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object->mDrawOps[i].drawAsSky = isSkyObj; // sky dome -> PASS_SKY (fullbright)
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// PUNCH (dpl_Punchize; BT_PUNCH=0 disables): cutout batch -- black texels
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@@ -1279,7 +1284,9 @@ void d3d_OBJECT::DrawMesh(int pass, const D3DXMATRIX *viewTransform, Time target
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// (SRCALPHA/INVSRCALPHA). Runs only in the blend pass (the op filter
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// above routed it there; ALPHABLEND is on and z-write off pass-wide).
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DWORD sVLight = 0, sVSrc = 0, sVDst = 0, sVCop = 0, sVCa1 = 0, sVCa2 = 0, sVAop = 0, sVAa2 = 0;
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const bool vtxAlphaCard = (drawOp->vertexAlphaBlend && pass == PASS_ALPHABLEND);
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const bool brightenCard = (drawOp->brightenAlpha > 0.0f && pass == PASS_ALPHABLEND);
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const bool vtxAlphaCard =
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((drawOp->vertexAlphaBlend && pass == PASS_ALPHABLEND) || brightenCard);
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if (vtxAlphaCard)
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{
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mDevice->GetRenderState(D3DRS_LIGHTING, &sVLight);
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@@ -1292,13 +1299,35 @@ void d3d_OBJECT::DrawMesh(int pass, const D3DXMATRIX *viewTransform, Time target
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mDevice->GetTextureStageState(0, D3DTSS_ALPHAARG2, &sVAa2);
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mDevice->SetRenderState(D3DRS_LIGHTING, FALSE);
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mDevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA);
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mDevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA);
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mDevice->SetRenderState(D3DRS_DESTBLEND,
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brightenCard ? D3DBLEND_ONE : D3DBLEND_INVSRCALPHA);
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if (brightenCard)
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{
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// BTFX brighten veil: dest += vertexRGB x factor. SPOT.BGF's
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// verts author the beam tint (cyan-white 0.12/0.98/1.0, alpha
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// 1.0 -- no fade gradient); the factor rides TFACTOR alpha.
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// [T3 tint compose]: the night material ALSO authors emissive
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// (0.9,0.4,0.2 warm) -- whether the DIV board tinted the veil
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// by vertex, emissive, or their product is unconfirmed; vertex
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// (a white-blue searchlight) matches the authored geometry
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// gradient model. Flip here if era-look evidence says warm.
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mDevice->SetRenderState(D3DRS_TEXTUREFACTOR,
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D3DCOLOR_COLORVALUE(1.0f, 1.0f, 1.0f, drawOp->brightenAlpha));
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mDevice->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_SELECTARG1);
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mDevice->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_DIFFUSE);
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mDevice->SetTextureStageState(0, D3DTSS_COLORARG2, D3DTA_TFACTOR);
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mDevice->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_SELECTARG2);
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mDevice->SetTextureStageState(0, D3DTSS_ALPHAARG2, D3DTA_TFACTOR);
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}
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else
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{
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mDevice->SetTextureStageState(0, D3DTSS_COLOROP,
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drawOp->texture.texture != NULL ? D3DTOP_MODULATE : D3DTOP_SELECTARG2);
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mDevice->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TEXTURE);
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mDevice->SetTextureStageState(0, D3DTSS_COLORARG2, D3DTA_DIFFUSE);
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mDevice->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_SELECTARG2);
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mDevice->SetTextureStageState(0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE);
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}
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}
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const bool copCut = (drawOp->copRole == 2 && iOp > 0
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@@ -350,6 +350,12 @@ struct MatInfo {
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// EMISSIVE (tag 0x26): pure-emissive materials (diffuse black) render as an
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// unlit glow -- tex x emissive (btpolar:pintBIceEmit_mtl, the polar ice).
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bool hasEmissive = false;
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// BTFX "brighten" class (SPOT.BGF searchlight beam cone): the material
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// smuggles its ADDITIVE factor in DIFFUSE.r (brighten.25 authors diffuse
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// {0.25,0,0}) and its glow colour in EMISSIVE ({0.9,0.4,0.2} on the night
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// page). 0 = not a brighten material; >0 = draw as an additive veil,
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// dest += emissive x factor (the 1995 DIV brighten semantics).
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float brightenFactor = 0.0f;
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float emissive[3] = {0,0,0};
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};
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@@ -495,12 +501,14 @@ struct MaterialResolver {
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std::string name, texName, rampName;
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MatInfo info;
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bool haveColor = false;
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float rawDiffuseR = -1.0f; // brighten-class factor carrier
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for (const Chunk& ch : c.children) {
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if (ch.id == TAG_NAME) name = chunkStr(ch);
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else if (ch.id == TAG_MATERIAL_TEXTURE && ch.len > 1) texName = chunkStr(ch, 1);
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else if (ch.id == TAG_RAMP_REF) rampName = chunkStr(ch);
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else if (ch.id == TAG_DIFFUSE && ch.len >= 12) {
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info.color = packColor(rdF32(ch.data), rdF32(ch.data + 4), rdF32(ch.data + 8));
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rawDiffuseR = rdF32(ch.data);
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haveColor = true;
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info.hasDiffuse = true;
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} else if (ch.id == TAG_AMBIENT && ch.len >= 12 && !haveColor
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@@ -520,6 +528,12 @@ struct MaterialResolver {
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info.hasEmissive = (info.emissive[0] + info.emissive[1] + info.emissive[2]) > 0.001f;
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}
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}
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// BTFX brighten class: name-gated so ordinary materials keep
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// their diffuse semantics untouched (the factor rides only in
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// "brighten*" records -- brighten.25/.5/.75 in btfx.bmf).
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if (name.compare(0, 8, "brighten") == 0 && rawDiffuseR > 0.0f)
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info.brightenFactor = rawDiffuseR;
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// Resolve the ramp reference to its low/high colours: this
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// file's own definitions first, then the cross-library
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// registry (mech skins reference 'softer' defined elsewhere).
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@@ -645,6 +659,7 @@ struct Builder {
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int currentCopRole = 0; // role of the pmesh being built (consumed by buildPmesh)
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bool currentHasEmissive = false;
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float currentEmissive[3] = {0,0,0};
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float currentBrighten = 0.0f; // btfx brighten-class additive factor
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// per-vertex scratch (normals accumulated from forward triangles only)
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std::vector<float> px, py, pz, nx, ny, nz, uu, vv;
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@@ -926,6 +941,7 @@ struct Builder {
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batch.shadowMat = currentShadowMat;
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batch.hasEmissive = currentHasEmissive;
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for (int i = 0; i < 3; ++i) batch.emissive[i] = currentEmissive[i];
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batch.brightenFactor = currentBrighten; // btfx additive veil (spot cone)
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// SUBMISSION-ORDER DEPTH BIAS (additive objects): the content layers
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// EXACTLY-COPLANAR shells (AR02 LOD2: solid concrete + a coplanar
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// PUNCH-cutout overlay + an inner shell, plane separations
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@@ -1251,8 +1267,9 @@ struct Builder {
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for (int i = 0; i < 3; ++i) { currentRampLo[i] = info.rampLo[i]; currentRampHi[i] = info.rampHi[i]; }
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currentHasEmissive = info.hasEmissive;
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for (int i = 0; i < 3; ++i) currentEmissive[i] = info.emissive[i];
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currentBrighten = info.brightenFactor;
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}
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else { currentColor = colorForMaterial(full); currentTex.clear(); currentHasDiffuse = false; currentTexChannel = 0; currentTexScroll = false; currentTexScrollU = currentTexScrollV = 0.0f; }
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else { currentColor = colorForMaterial(full); currentTex.clear(); currentHasDiffuse = false; currentTexChannel = 0; currentTexScroll = false; currentTexScrollU = currentTexScrollV = 0.0f; currentBrighten = 0.0f; }
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// TRANSLOCATION WARP: override the material's coarse "sky" ramp with the
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// NARROW LAVENDER ramp that matched the original (capture.png). The swirl
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// is the bintA cloud coloured lo->hi by luminance; a wide sky ramp
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@@ -44,6 +44,12 @@ struct BgfDrawBatch {
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// alpha). The verts keep their authored RGBA gradient and the draw routes
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// to the alpha-blend pass, unlit, colour = texture x vertex gradient.
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bool vertexAlpha = false;
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// BTFX "brighten" ADDITIVE VEIL (the searchlight SPOT.BGF beam cone): the
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// material class authors its factor in DIFFUSE.r and its glow colour in
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// EMISSIVE; the batch draws in the blend pass as dest += emissive x factor
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// (1995 DIV brighten semantics; the record also authors fog IMMUNE +
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// DRAWLAST, both satisfied by the blend pass). 0 = not a brighten batch.
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float brightenFactor = 0.0f;
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// TEXTURE ALPHA CUTOUT (issue #3, the wreck scorch splat): an RGBA4444 BSL
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// slice (texChannel >= 8) carries an AUTHORED alpha channel -- in the shipped
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// content it is a BINARY 0/240 cutout mask (bexp9 = the scorch splat
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@@ -109,6 +109,11 @@ struct L4DRAWOP
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// UNLIT, colour = texture x the authored per-vertex gradient, alpha = the
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// per-vertex fade (SRCALPHA/INVSRCALPHA).
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bool vertexAlphaBlend;
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// BTFX BRIGHTEN VEIL (the searchlight SPOT.BGF cone): additive brighten of
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// the framebuffer, dest += material.Emissive x this factor (the class
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// authors the factor in DIFFUSE.r, the glow colour in EMISSIVE). Drawn in
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// the alpha-blend pass, unlit, fog-immune by authoring. 0 = off.
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float brightenAlpha;
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// COCKPIT PUNCH STENCIL-CUT (task #55, i860-firmware-decoded): 0=normal,
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// 1=aperture MASK (drawn stencil-only, paired with the following hull op),
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// 2=HULL (drawn stencil-rejected under the mask = window cutouts).
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@@ -210,7 +210,12 @@ void
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// is how a night mission starts on nosearchlightfog.
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tree.searchFogCache[tree.searchLightCount] =
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(*attrs[sl] == 0);
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if (!tree.searchIsCockpit)
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// BT_SPOT_SELF=1 (bench-only): build the cone on the
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// OWN-cockpit tree too, so the V-chase camera can
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// eyeball it solo. Authentic builds never cone the
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// cockpit tree (the 1995 view-1 branch stashes attrs
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// only) -- keep this env off outside look benches.
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if (!tree.searchIsCockpit || getenv("BT_SPOT_SELF"))
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{
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// NB: the renderer-level LoadObject wrapper (@00498448) is
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// still a btstubs no-op; load through the d3d route the
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