689c478a7f
Implements THE WORLD CONTRACT (TECH.md) in web/js/world/; drop-in for the stub. boot.js now runs this on C's L2_esophagus (3600u, hash cefc4f83), zero console errors. - spline.js: centreline + arclength LUTs + parallel-transport frames + radius law + peristalsis phase + project() + hash(). No three.js import, so qa can run its 14-assertion selfcheck headless. - curviness is solved from a curvature budget, not authored as an amplitude: the pinch guard caught the tube folding through itself on a wide+curvy join (turn radius 9.9 vs tube radius 17.2). C can no longer author a pinch. - peristalsis: global OMEGA, k(s) = OMEGA/flow(s), phase K(s) = integral k ds. A crest therefore travels at exactly the local flow speed, so "surf the crest" == "ride the current". Esophagus wave amp 0.9 -> 1.4 (measured): moves wallRho for Lane B. - tube.js: chunked streaming, seams aligned to biome joins, arenas own their s-span. - arena.js: displaced icosphere shells v0 (three's polyhedron detail is 20*(detail+1)^2, not 20*4^detail — 720 tris was far too coarse); fog sized to the room, since biome fog tuned for 100u corridors renders C's 360u acid sea as a black rectangle. - index.js: prefers assets.texture() over get() (get returns raw JSON a shader can't eat), plus an explicit slug map — D's wall_smallint_a vs biome id small_intestine would miss silently forever under the assets-optional law. Measured (C's real L2 + D's real pack, 1920x1080, renderer.info): 8 draws worst frame (budget 150), 74k tris (500k), no geometry leak across a full sweep, <120ms load, pinch ratio 3.32. fps not claimed — the screenshot pane runs tabs hidden, pausing rAF. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
47 lines
2.9 KiB
Markdown
47 lines
2.9 KiB
Markdown
# Lane A — progress log
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## 2026-07-16 · Round 1 — the canal, v0
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Built `web/js/world/`: spline + parallel-transport frames + arclength LUTs, chunked streaming
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tube, synthetic-scanner wall shader with vertex peristalsis, biome registry, arena shells v0,
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noclip flycam, headless selfcheck, dev harness. Contract per TECH.md §THE WORLD CONTRACT,
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drop-in for the stub.
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**The game boots it.** `/?dbg=1` (no `?stub`) runs Lane A's world on C's `L2_esophagus`,
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3600 units, hash `cefc4f83`, zero console errors. C's registry landing mid-round is what
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unblocked `boot.js`'s `pickWorld()`; no shell change was needed.
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Measured (dev.html, C's real L2 + D's real pack, 1920×1080, `renderer.info`):
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draws **8** worst-frame over a full-canal sweep (budget ≤150) · tris **74,420** (≤500k) ·
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geometries 6 → 6 across a full sweep and back, **no leak**, 0 after `dispose()` ·
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load **<120 ms** (<2 s) · pinch ratio L2 3.32 / L3 1.89 (>1.5). fps deliberately **not**
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claimed — the screenshot pane runs tabs hidden, which pauses rAF, and `gl.finish()` didn't
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sync; needs a real window. Determinism: node and browser agree on the hash.
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Three defects the checks caught that eyeballing would not have:
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- **Tube folded through itself** on a wide+curvy join (turn radius 9.9 vs tube radius 17.2).
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Root cause: centreline amplitude authored in units. Fixed by solving amplitudes from a
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curvature budget, so `curviness` means "fraction of the pinch limit" and C can't author one.
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- **Arena at 720 tris** — three's polyhedron `detail` is `20*(detail+1)^2`, not `20*4^detail`.
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Now solved for ~3u spacing from the arena's own radius.
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- **Acid sea rendered as a black rectangle** — biome fog is tuned for 100u corridors, C's arena
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is 360u across. Arena fog is now sized to the room.
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Also caught, and both would have rotted silently: the browser served a **stale cached
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`biomes.js`**, so the first evidence set was shot at the old wave amplitude (re-shot); and D's
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texture keys (`wall_smallint_a`) don't match my biome ids (`small_intestine`), which under the
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assets-optional law fails to procedural forever with no error (slug map added, standardisation
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proposed to D).
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Decisions: peristalsis phase `K(s) = ∫k ds` with `k = OMEGA/flow(s)` ⇒ crest speed == local flow
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(so "surf the crest" == "ride the current") · esophagus wave amp 0.9 → 1.4, measured, moves
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`wallRho` for B · chunk seams align to biome joins, arenas own their span · one uv attribute,
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tiling derived in-shader · colorspace left matching the stub, F to rule.
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Evidence → `docs/shots/laneA/`: `round1_real_game_boot` (boot.js running Lane A's world),
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`round1_L2_textured` / `round1_L2_procedural_fallback` (same pose, with and without D's pack —
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the assets-optional law), `round1_L2_curve`, `round1_L2_wave_crest`, `round1_L3_arena_acid_sea`.
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Open for round 2: triplanar arena shells + acid plane, villi band, normal/matcap TBN, sphincter
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seam geometry. Full detail + per-lane asks in `LANE_A_NOTES.md`.
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