Fr0zka
861dc8e109
The instrument landed on its first run. At production defaults, rooms reaching go 0.9 -> 0.4 and tunnels 2.4 -> 1.1 when the warp dilation is set to zero: more than half of all remaining blocking is the query box rather than cave geometry. Hypothesis confirmed, and the number is permanent output now. CORRECTION 1. Last entry I claimed BuildChunkCache's Expansion = CaveWarpStrength + 2 means "the whole plugin bets on |Perlin3D| <= 0.8", and used it to argue 2.0 was needlessly conservative. False. Six lines further down, bNeedRebuild tests WarpedX < CachedSMinX || WarpedX > CachedSMaxX -- the cache REBUILDS when the warped query leaves the box, so that expansion is a rebuild-frequency heuristic and nothing bets on 0.8. The 2.0 -> 1.5 change stands on its own derivation. Sixth premise this refactor that reversed on checking, and I asserted this one in the same entry where I diagnosed the habit. CORRECTION 2 / NEGATIVE RESULT. The obvious next move -- evaluate the warp at the box centre, SHIFT the box, dilate only by the variation across it -- does not pay here, worked out before writing it. A rigorous per-axis Lipschitz bound for this Perlin3D is |dV/dfx| <= 4*1.875 + 1 = 8.5 per unit cell (fade derivative times the spread of GradDot, plus GradDot's own linear term, u and v being distinct axes). The half-box is 0.206 in noise units, so the local variation bound is 1.75 against a GLOBAL range bound of 1.5. The local bound is worse than the global one. Recorded so nobody spends a build rediscovering it. That leaves one route for the warp term: tightening the sup of |Perlin3D| from the proved 1.5 toward its apparent true value ~1.0-1.1, worth ~27% of the dilation. Spot-checking a grid is not a proof, and a sup proved wrong is a tile with no geometry and no collision -- so that is a judgement call about appetite, not a technical unknown. State: T1.d delivered and verified. 11 of 40 tiles (27.5%) proved AllSolid at production defaults, 14641 voxels brute-forced, 0 violations. The dense fixture correctly proves nothing. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>