Seed 2 route ground and capsule-foot bounds need gradient_x <= -1024 and >= +1989 Q16 at once (still disjoint with a 0.097 m bore raise). Three fits failed; patch archived; causes 2-3 not attempted. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016dhxM43dnWvUu2B5Ph1iG1
4.4 KiB
Linux155 — chamber floor plane reached the stop rule
Result
Stopped after three failed fits for cause 1, as instructed. A single planar chamber floor cannot satisfy the seed-2 Surface World route's ground and capsule-foot bounds while joining the current passage floor at the bore. The rejected candidate was removed from production source. The branch remains at HEAD, evaluator v239. Causes 2 and 3 were not attempted; no baseline or version change was made.
Measured plane conflict
The receiving route runs along +X through the upper chamber. Its route-point Z is the player-center height; the ground bound is route Z − 0.98 m, and the capsule-foot bound is route Z − 0.88 m. The chamber center floor at the bore is -374.831 m. With the endpoint fixed to the planned h(s) value:
- At route point
x=24.25 m, the capsule-foot bound requiresgradient_x ≤ -1,024 Q16(−1.56%). - At route point
x=26.75 m, the ground bound requiresgradient_x ≥ 1,989 Q16(+3.03%).
The constraints do not overlap. The third fit allowed the bore endpoint and first 10 m of h(s) to rise together by up to 99 subvoxels (0.0967 m, the remaining capsule-foot clearance). At that limit the same points require gradient_x ≤ -9,472 Q16 and gradient_x ≥ 39 Q16; they still do not overlap.
Attempts
- Fit the floor slope above route ground and preserve the bore-center height. The route support audit fell from 5 unsupported samples to 0, but the passage then blocked 481 capsule samples. Plan grade stayed under 15°. Log:
cause1-seed2.log. - Add the capsule-foot upper bound. Strict planning rejected the layout because no gradient fit both bounds with the bore floor fixed. Log:
cause1-bounded-seed2.log. - Allow a bounded center raise and taper it through the first 10 m of
h(s). The route and capsule constraints remained infeasible; planning rejected before producing a layout. Log:cause1-between-seed2.log. The final rejected fit is archived infailed-plane-fit.patch.
Checks and limits
- Clang 19 candidate builds passed for each compiled planner variant. The first candidate's focused seed-2 audit completed and failed on 481 blocked capsule samples; the second and third failed strict layout planning.
git diff --checkpassed after restoring the production source to HEAD. No production or UnrealSource/files remain changed.- L154 had already measured the HEAD fast-tier failure on the Floating Islands chamber content band. Fast tier was not rerun after the three-fix stop.
- Not run: causes 2 and 3, full fast tier, either 16-seed sweep, determinism, owner baselines, L80 timing, Linux UE build/start/movement, or after captures.
Remaining risk
The measured conflict is between a single plane and the receiving route's local height variation across the 7.5 m chamber footprint. Resolving it needs a different floor representation or a change to the receiver route/bore join. The chamber support-audit exemption and Floating Islands content-band failure remain open.





