Map and Biomes

Map and Biomes [CURRENT]

Map Generation

Three-stage pipeline, ported from the original Java game. Each stage feeds the next, all driven by one seed:

flowchart LR
    S([seed]) --> A[1 · DLA cave carving<br/>carve until ~35% open]
    A --> B[2 · Voronoi biomes<br/>nearest-seed + smoothing]
    B --> C[3 · Tile placement<br/>best color-match × 4 rotations]
    C --> M([identical map<br/>server + every client])

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1. DLA cave carving — Diffusion-Limited Aggregation carves walkable space until ~35% of the map is open.
2. Voronoi biomes — biome seeds scatter; each tile takes its nearest seed's biome (with smoothing passes).
3. Tile placement — for each walkable cell, score candidate tiles from that biome by matching color profiles to neighbors, trying 4 rotations (ROT_MAP), and place the best match.

Parameter	Value
Map size	400 × 400 tiles
Walkable target	35%
Tile size / overlap / effective	128 / 48 / 80 px
Monster density	0.5% of walkable tiles
Spawned monster levels	Lv. 1–5

Seed-deterministic (P0-T2 done): generation takes a seed and a seeded RNG, so the same seed reproduces an identical map on server and every client — verified by a determinism test. The online view draws culled, biome-colored tiles and a corner minimap; main-view camera zoom is a remaining polish item.

Biomes

Biome definitions (name · rarity · size · speed). Speed is the movement multiplier applied to anyone standing in that biome (server-authoritative online, local in SP) — open ground is brisk, wet/rough terrain drags. Deterministic. The multiplier is bilinearly smoothed across biome boundaries (PT1-T22), so your speed eases over ~one tile when crossing rather than snapping at the edge. Stacks with sprint.

Biome	Rarity	Size	Speed
Forest	30	80	0.92×
Plains	40	60	1.15×
Desert	40	60	0.90×
Tundra	50	80	0.88×
Volcano	70	60	0.85×
Swamp	40	60	0.72×
Metal	70	60	1.00×
Stone	30	60	1.00×
Mushroom	70	40	0.90×
Astral	90	40	1.10×
Water	90	80	0.70×
Crystal	60	50	1.05×