beezm
c32a3b177c
Core/Scripts/RegionLabeling.cs is the shared-infra contract, built to the letter: it runs on the CLASSIFY (raw) field; land is 8-connected, the deliberate complement of water's 4 (a diagonal isthmus joins; the water either side stays separate); a component is a maximal 8-connected set of land cells; the MAINLAND is the component containing the map centre — not merely the largest, which a later fragmentation step could flip — with a flagged fallback to the largest if the centre were ever water (asserted, never needed: oracle m); every other component is an island; per component id / sizeCells / centroid / hemisphere (by centroid, one label per island) / isMainland. Ids come from a fixed scan order and are proven stable across two generations (oracle o, 16.8M cells). It knows nothing about offshore or stamped. Engine-free, in Core as C++-candidate math; the hemisphere convention moved there with it, OffshoreAnalysis aliases it. Tools/Scripts/RegionPass.cs is pass 1c: label, revert, relabel, tag. The island tag (renamed IsIsland; IslandHemisphere from the component's centroid; Pass1Result.Regions carries the whole table) is now a CONSEQUENCE of labeling — every non-mainland component. That is the fix for the chat2/06 overlay, which tagged only what the offshore pass raised: 1063685222 has 11 natural islands including a 94,511-cell detached mass, 20260821 has 19, all grey in 06's tags.png and all coloured now. The offshore pass itself is untouched; its internal Tag stays for its own guards and is no longer exported. The speck revert (TerrainGenConfig.SpeckRevert / MinLandComponentFrac) lowers every non-mainland component below the threshold to the mean of its ring of adjacent sea cells, held strictly below sea. Origin-blind: a natural nub goes the same way as an offshore dot (6 natural components / 273 cells on the bare 1063685222 field at threshold_mid — reported as a3r, informational). Lower-only and component-only are asserted cell by cell in the pass and re-proven on the finished fields by oracle n (mainland bit-identical filter OFF vs ON; every changed cell in a sub-threshold island, lowered below sea); the mainland is never a candidate and its size is asserted unchanged across the revert. A reverted offshore island leaves its submerged skirt as a shoal — not this component, by the rule. Classify/render consistency is by construction (pass 1, curve identity at sea) and asserted by oracle k. Deliberately OFF in the bare TerrainGenConfig for the reason the shelf and islets are: the raw field has natural specks, so default-ON would move the calibration pool and every regression dump; the batch turns it on. Thresholds swept on 8 seeds at 4096 (1e-5 / 3e-5 / 1e-4 of the map = 168 / 503 / 1,678 cells): low removes 0–6 nubs per seed, mid (the config default, equal to the offshore guard) 2–11, high 26–36 — most of the offshore islands, the "fewer, bigger" bookend. The count/size table carries natural / pre / post counts per hemisphere, min/median/mean/max and a log-spaced size histogram — the instrument for the southern-stretch step. Oracle, all passing: a1, a3, a4 (8192, 67M cells) with labeling ON + revert OFF; a6 NEW — labeling ON + revert OFF on the 06 preset bit-identical to the 06 batch's render field (labeling is pure analysis); j0; m, n, o, i, j, k, l, b per field. Batch: BatchRoot(7, "region_labeling") — exactly 4 plates (three thresholds on 1063685222, threshold_mid on 20260821, the table's most-natural-islands seed), each with grayscale / .f32 / relief / the labeled-regions overlay / the tag overlay, plus count_size_table.md/.csv. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_013EY3ZTF6NwzF8ukBHQXSK7
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