Per the task-07 gate: the terraces work but uniform anchors put a flat
ring at exactly 100 m and 220 m on every mountain. v4 keeps v3's
structure (frozen toe/rise, three risers, per-seed u4 spike to 420 m)
and turns the shelf anchors into smooth spatial fields: bench
100+-12 m and plateau 220+-20 m via two decorrelated very-low-freq
Simplex fields (~3 undulations per island width), plus a strength
field (~5/island) blending each shelf's output span between ~2 m
(pronounced flat) and ~25 m (barely a hint) — the optional strength
modulation shipped, ordering-safe by construction (worst-case bench
top 0.6962 < plateau min 0.9468). Field seeds derive from the RESOLVED
noise seed + fixed offsets (7101/7207/7303) — no config knob. Apply is
per-column with all modulated values as pure parameters (D-035); the
classify path never sees them.
Monotonicity assertion now sweeps all 8 modulation-extreme corners x
per-seed spikeMax. TerrainCurve gate "off"|"v4" (default v4);
v1-v3 retired loudly. TCRV extended (+36 B when version>=4:
amplitudes, span range, frequencies, seed offsets — length-framed
section makes the layout change safe; parser dispatches on the curve
version byte; harness compares the extension).
Note: MapGenerator.cs also carries the developer's editor whitespace
normalization (spaces->tabs, git diff -w empty before this change).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Per the task-05 hillshade-gate verdict: lowlands frozen (identity/toe/
rise/shoulder/plateau byte-unchanged); the spike now maps [t4,
hMaxSeed] — each seed's own raw pre-curve maximum, computed in a new
pass-1 over GenerateTopography — onto the peak band, so every island
reaches the ceiling (v1's pooled-max domain left mid-range seeds at
110–175 m). Spike stiffened to 0.1u + 0.9u^4; peak cap raised to
420 m above sea (1.82869). Degenerate near-flat guard: spike domain
floored at t4 + 0.01. The curve is now SEED-DEPENDENT: hMaxSeed is a
pure parameter (D-035), recorded in TCRV (field renamed
HMaxCal -> SpikeMax, same byte layout; v1 semantics = pooled max, v2 =
per-seed), and the monotonicity assertion runs per generation against
the effective curve. TerrainCurve gate: "off"|"v2" (default v2);
"v1" retired with a loud config error (task-05 blueprints are
regenerable). Classify path untouched — the biome/water oracle must
hold unchanged.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
0_height: hypsometric storm-ladder tint x Lambert NW hillshade over
the curved heights, captured after topography in both curve modes —
relief is finally visible. Renumbers nothing.
TCRV (50 B, emitted when the curve is on): curve version + input knots
+ output bands, so blueprints are self-describing about the map their
heights went through (H7 spirit). Parsed into
WorldBlueprint.TerrainCurve (null = raw legacy profile); server treats
it as metadata. Round-trip harness compares it when present.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Three new v2 tagged sections carrying the water-bodies stage output:
WBID (MapSize^2 u16 body ids; 0 none, 1 ocean, 2..N lakes), WBTB
(count-prefixed 20-byte records: id, type, provisional salinity,
transitional flat surface level, pixel count, centroid), WSRF
(MapSize^2 u16 quantized levels; 0 = no-water sentinel, 1 + L*32768
encoding, ~7.7 mm world resolution). Written only when the blueprint
carries water; absent on legacy re-encodes. Parser registers all
three (length + type checks) into new WorldBlueprint members —
consumed by nothing at runtime. Round-trip harness now compares the
water sections whenever the source carries them; v1-source baseline
stays green.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
v2 tagged-section container (D-030): raw ISLA magic + u32 version gate,
[u32 tag][u64 length][payload] sections — params (resolved generation
inputs incl. impact centre), heights f32, biomes u8, towns with the
highway-node flag, four road tiers identified by tag not position.
- BlueprintFormat.cs: the single tag/constant registry.
- BlueprintWriter.WriteV2: blueprint-typed, callable outside a
generation run; generator and harness are both just callers.
- ExportMapData dual-writes: v2 under the primary seed name, legacy v1
beside it as _v1.dat (safety net; removal is a future task).
- MapDataParser: LoadMapDataFromPath entry point; v1 parse body
extracted intact as LoadV1 (v2 reader lands in the next commit).
- RoundTripHarness scene: load v1 -> write v2 -> load v2 -> semantic
equality, headless, seconds per cycle.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
