VoxelForge/Standalone/Research/WorldAssemblerM3/Linux99/REPORT.md

Linux 99 — bounded swept-tube passages

Branch: assembler/world · evaluator version: 215 · no commit made.

Design

The route plan and its three passage splines are unchanged. L98 and L99 resolve the same layout identity (resolved-layout-v3-fnv64:0589300eb07dfe06) and exact passage control points. L99 prepares each tile's sorted route-segment candidates from tube bounds expanded by 4 m, min-combines their tube distances, then applies localized wall/floor relief and mouth shaping in the detail sweep. A 0.5 m edge blend bounds the integration with the strate field. Existing tread, clearance, mouth fade, and void-crossing support remain in generation.

Speed

L80 protocol: three interleaved measured L98/L99 pairs at W8 and W12, with warmups, for each stratum. Entries are median seconds (L98 → L99). Stratum labels are explicit: SW = Surface World, FI = Floating Islands, TN = Tunnel Network, VS = Vertical Shafts. Whole/near tile counts are shown to keep the world labels fixed.

Workers	Stratum	Whole / LOD0–2 tiles	Near ready (s)	Whole-view ready (s)
8	SW	2,850 / 1,408	1.179 → 0.970	2.605 → 2.241
8	FI	2,249 / 1,216	2.342 → 1.499	3.583 → 2.524
8	TN	2,233 / 1,344	2.357 → 1.506	3.420 → 2.449
8	VS	2,329 / 1,344	2.204 → 1.721	3.429 → 3.028
12	SW	2,850 / 1,408	1.006 → 0.799	2.114 → 1.845
12	FI	2,249 / 1,216	2.225 → 1.432	3.382 → 2.373
12	TN	2,233 / 1,344	2.183 → 1.369	3.188 → 2.237
12	VS	2,329 / 1,344	1.093 → 0.983	2.019 → 1.884

All eight cells beat L98. FI/TN approach the ~1 s target, but remain above the passage-off ceilings (0.81/0.85 s). Native Clang and GCC builds took about 11m30s and 1m38s combined; these are accounted separately from readiness times. The Unreal VFHostEditor Linux Development build succeeded after timing in 71.50 s with -NoUBA -MaxParallelActions=4.

The fast tier is PASS: 80 runs, 301.4 s, 269 passing checks and 5 retained historical-hash diagnostics. Both v215 owner hash pins pass.

Passage audits and measured work

The full-view canonical audit (max-level=-1, W12) passes 21,425/21,425 centerline samples. All three resolved interfaces passed:

Interface	Center / capsule samples	Blocked	Support samples / unsupported	Grade failures	Mouth content / radius	Result
0–1	4,151 / 261,513	0	27,206 / 0	0	2/2 · 2/2	PASS
1–2	239 / 15,057	0	1,309 / 0	0	2/2 · 2/2	PASS
2–3	1,027 / 64,701	0	5,651 / 0	0	2/2 · 2/2	PASS

The audit summary reports naturalness 3/3, all three interfaces passed, and zero route-binding failures. The fast-tier owner style-1 and style-2 audits also pass, as does the arrival/departure chain (interfaces=3/3 all_walkable=true). Capsule clearance, support, headroom, grade, floor and mouth profiles, route binding, open-air, no-long-bridge, rock-column and ripple checks pass.

L77 near-LOD passage CPU share (three repeats, measured mean):

Stratum	L98	L99
SW	42.83%	19.75%
FI	56.22%	34.78%
TN	55.58%	28.81%
VS	30.21%	8.56%

Measured LOD0–2 sweep counters (W8):

Stratum	Bounded segment candidates	Segment/sample pairs (outside-bound rejects)	Grid samples (no influence)	Base / detail samples
SW	892	8,568,233 (4,699,672)	14,011,370 (11,949,427)	2,061,943 / 210,393
FI	1,439	15,261,585 (8,730,625)	21,565,975 (18,604,965)	3,377,667 / 347,335
TN	1,560	14,723,215 (8,313,402)	17,969,538 (15,233,648)	3,152,585 / 332,547
VS	1,558	14,092,586 (7,348,748)	20,749,529 (18,066,064)	2,683,465 / 273,636
Total	5,449	52,645,619 (29,092,447)	74,296,412 (63,854,104)	11,275,660 / 1,163,911

The profile covered 478/629/614/699 near tiles (SW/FI/TN/VS). Counts are measured. The bounded-reject and no-influence counts mean those segment tests and tube samples do not proceed to distance composition; the remaining 43,354,950 prepared-sweep lookups had 11,996,257 hits and 31,358,693 misses.

World change and captures

Carve-reach comparisons covered every desired near-set tile: SW 1,408/1,408, FI 1,216/1,216, TN 1,344/1,344, VS 1,344/1,344. Every stratum had zero sign flips and zero edge-crossing mismatches.

Stratum	Max / mean displacement	Max / mean normal change	Moved crossings	Pairing failures
SW	20.11 / 0.0180 cm	21.35 / 0.0874°	9,214	21
FI	19.80 / 0.0185 cm	29.91 / 0.0477°	10,238	114
TN	21.74 / 0.0387 cm	41.79 / 0.0291°	11,370	116
VS	25.88 / 0.0178 cm	49.82 / 0.00731°	5,087	32

The audit's FAIL status is only its existing 1 cm displacement / 2° normal-change diagnostic threshold; those thresholds were not an L99 gate. Maxima and their coordinates are in the capture index. Paired L98/L99 captures include the top five displacement sites, top five normal-change sites, both mouths of all three passages, and a midpoint view for each passage: 19 matched views / 38 before-and-after PNGs in captures/INDEX.md, plus ten amplified hotspot diffs.

Determinism and version

All 24 whole-view runs passed: Clang/GCC at W1/W8/W12 across SW/FI/TN/VS. The 20 peer comparisons had zero tile-count, per-tile hash, or whole-hash mismatches. Representative Clang W1 whole hashes (tile count followed by four components):

Stratum	Whole hash
SW	2850, a962f8cb29383f0e, 3deecb1a8f537726, fa367c6df153636f, 0b0a55b24243bd1e
FI	2249, 1d867417832047f9, 3f5bf03b78621a43, 601921b84046915d, c00d44660831d266
TN	2233, 3c0f10f94c18944d, e213da2d3bc34fe1, 318aaa3a18a997be, 7a1cd0183cc57c07
VS	2329, 3005885856f8adef, 2e3181ca8152f93c, 0cddc16aa45946bb, 69eb58192bab4302

Version 215 pins: owner-hash-floating-islands-style2-v215.baseline and owner-hash-surface-world-style1-v215.baseline. Source stamp: 0d31d588192e30bd.

Failed runs

• The first fast-tier attempt stopped at stale pre-L99 hash pins; v215 pins were added and the full rerun passed.
• A zero-radius smoke configuration aborted with std::bad_alloc on both L98 and L99; it was an invalid diagnostic setup. Capture probes first rejected an overly strict mouth-anchor assumption, then hit open-contour clip-cap errors; a camera-coordinate bug also produced an empty render. Those probes were corrected, and the final matched views rendered successfully without clipping.
• The displacement/normal diagnostic returned exit 14 because its legacy 1 cm / 2° thresholds were exceeded. This reports the measured world change above, not a passage walkability failure.

All measured workload processes were capped below 30 minutes and run on CPUs 0–11; headless processes used the 6 GiB address-space limit. Logs and summaries are under Saved/Linux/l99/. No install, commit, push, or stash was made.

Captures (fixed)

The first hotspot views exported LOD0, while these maxima come from LOD2. The fixed views export the matching LOD2 audit tile, put the exact audit point at image center, and place the camera 3.25 m from its L98 surface (3.25–3.29 m from the audit point). Each before-and-after surface triangle is within 0.09 m of the reported point in the matching LOD2 tile. Displacement views look obliquely along the passage; normal-change views use normal-color shading. Pixel counts below are measured decoded RGB pixels with any changed channel; each diff image is absolute RGB difference amplified 64×. All ten pairs differ.

Strata labels: SW = Surface World, FI = Floating Islands, TN = Tunnel Network, VS = Vertical Shafts. Passage distances are measured from the site to the nearest route centerline; surface labels use the nearest LOD2 surface and passage-region class.

Site	Strate · change · focus (m)	Surface · nearest passage	Changed pixels	Before / after / diff
top-displacement-01	VS · 25.88 cm · (18.000, -2.000, -817.035)	passage mouth surface · passage/2-3/0, 3.17 m	557,549	L98 / L99 / Δ×64
top-displacement-02	TN · 21.74 cm · (26.000, -4.000, -692.765)	passage upper wall/roof · passage/0-1/0, 3.47 m	565,587	L98 / L99 / Δ×64
top-displacement-03	SW · 20.11 cm · (-23.127, 4.000, -490.000)	passage upper wall/roof · passage/0-1/0, 3.45 m	760,804	L98 / L99 / Δ×64
top-displacement-04	FI · 19.80 cm · (16.000, -17.133, -668.000)	passage upper wall/roof · passage/0-1/0, 3.47 m	729,645	L98 / L99 / Δ×64
top-displacement-05	SW · 19.01 cm · (20.000, 15.067, -500.000)	passage wall · passage/0-1/0, 3.51 m	372,637	L98 / L99 / Δ×64
top-normal-01	VS · 49.82° · (39.696, 6.000, -820.000)	other strata rock wall outside passage envelope · passage/2-3/0, 24.47 m	423,185	L98 / L99 / Δ×64
top-normal-02	TN · 41.79° · (34.000, 5.849, -892.000)	other strata rock wall outside passage envelope · passage/2-3/0, 19.85 m	539,369	L98 / L99 / Δ×64
top-normal-03	TN · 35.51° · (38.000, 3.770, -844.000)	other strata rock wall outside passage envelope · passage/2-3/0, 23.26 m	738,068	L98 / L99 / Δ×64
top-normal-04	VS · 35.05° · (-6.234, 28.000, -824.000)	rock overhang/underside near passage · passage/2-3/0, 13.06 m	770,128	L98 / L99 / Δ×64
top-normal-05	FI · 29.91° · (-39.904, -16.000, -690.000)	rock overhang/island underside outside passage envelope · passage/0-1/0, 24.12 m	291,241	L98 / L99 / Δ×64

The earlier LOD0 pairs and a first LOD2 placement did not include the audited tile; the latter placed displacement-01's nearest surface 22.73 m away and failed the close-framing check. The final LOD2 tile keys match all ten audit rows and all ten image pairs pass the raw-pixel comparison. Export and render logs plus exact camera, triangle, and pixel-diff metadata are in Saved/Linux/l99/captures-fix/.