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islaApocalypse/Tools
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beezm 4d2e024b2f feat: curve v4 — spatially modulated shelves (terrain-water task 08) 
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>
2026-08-08 03:30:27 -04:00
..
Scenes docs: BLUEPRINT_FORMAT.md + README updates for the v2 container (terrain-water task 02) 2026-08-06 07:31:03 -04:00
Scripts feat: curve v4 — spatially modulated shelves (terrain-water task 08) 2026-08-08 03:30:27 -04:00
README.md docs: water sections (WBID/WBTB/WSRF), no-BSIN rationale, SkipRoads + water stage in READMEs (terrain-water task 03) 2026-08-07 01:40:48 -04:00

README.md

/Tools

Offline developer utilities. Nothing here ships. These generate the source data that /Server and /Client later consume, which keeps world-generation logic out of the shipped client.

The 2D world generator

Script: Tools/Scripts/MapGenerator.cs · Scenes: Tools/Scenes/MapPreview.tscn and Scenes/MapCaptureTool.tscn

Builds the topographical and logistical foundation of the island before any 3D exists.

  • Resolution is config-driven, from ServerConfig.json's MapProfile: 4K/6K/8K/10K → 4096 / 6144 / 8192 / 10240. Shipped default is 8K. 1 pixel = 1 in-game metre = 1 voxel footprint. (The MapSize field initialiser in the script says 4096, but it is overwritten from config before use.)
  • Topography: FastNoiseLite plus distance-falloff maths for a guaranteed mainland island, a mountain spine, dynamic temperature-driven sea level, and an impact crater pushed into the northern coast (carved at 80 % of its radius so a landbridge always survives).
  • Water bodies: the classified water promoted into explicit blueprint data (ocean + labeled lakes with transitional per-body levels — WBID/WBTB/WSRF sections), plus priority-flood basin diagnostics. The SkipRoads config toggle turns a full ~26-min generation into a ~80 s road-less iteration cycle.
  • Logistics: AStarGrid2D pathfinding producing a looping continental highway, a branch to the mountain hub, and county roads daisy-chained outward with Prim's algorithm. Paths are decimated (Ramer–Douglas–Peucker) then smoothed (4 Chaikin passes).
  • Zoning: biome mapping and tiered town/POI placement by slope, temperature and proximity.

⚠️ A* is the known bottleneck

The grid is one node per pixel — 67 million nodes at 8K — and the weight-setup pass walks every one of them. A full generation can stall long enough that runs get abandoned. await yields are sprinkled through the road stage, but they cannot interrupt a single engine-side GetPointPath call, so they only help between paths. Expect a regeneration to take minutes, or to need abandoning.

Outputs — written to user://, not into the project

File What it is
MapData_Seed_<seed>.dat The binary blueprint the server reads — v2 tagged container (~336 MB at 8K; contract in Core/Scripts/BLUEPRINT_FORMAT.md)
MapData_Seed_<seed>_v1.dat The same content in the legacy v1 format (~512 MB), dual-written as a safety net until a future removal task
Map_Seed_<seed>.png Visual snapshot of the map, for reviewing and picking seeds

On Linux: ~/.local/share/godot/app_userdata/islaApocolypse/.

Running it

Open Tools/Scenes/MapPreview.tscn and press F6. It is also the project's main scene, so pressing F5 anywhere runs this — which is why F5 regenerates your world instead of starting the game. Use Scenes/MapCaptureTool.tscn when you specifically want the full-resolution PNG.

Rules

  1. No client dependencies. Nothing here may reference UI, player controllers or shaders in /Client.
  2. Data out, nothing in. Tools emit .dat/.png/.json; they never write to a live server save.
  3. No magic numbers. Distances and radii scale off MapSize or the derived scaleFactor, so the generator behaves the same at every profile.