feat(terrain): renderoni/terrain — tiled heightfield cache and streamed LOD mesh - #40
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…ed LOD terrain mesh TiledHeightfield caches a caller's analytic height function in lazily filled, LRU-evicted tiles (bilinear heightAt, slopeAt with a tile-free coarse mode, prewarm, extra cached channels). Tiles are a pure function of the sampler so evictions rebuild bit-identically. TerrainMesh streams chunked, distance-LOD three.js terrain with skirts, a per-update build budget, unloading, any material, per-vertex attribute callbacks, and ray picking with an analytic raymarch fallback. TileCache and Buckets are exported on their own. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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A new
renderoni/terrainentry point for large procedural worlds, extracted from a shipping game.TiledHeightfield: caches a caller's analytic height function in lazily filled, LRU-evicted tiles. Subclass it and overrideanalytic(and optionallysampleExtrafor extra cached channels). It provides bilinearheightAt,slopeAtwith a tile-free coarse mode,prewarm,channel()and stats. Tiles are a pure function of the sampler, so an evicted tile rebuilds bit-identically, which keeps determinism.TerrainMesh: streamed, chunked, distance-LOD three.js terrain over anyHeightSource. It has skirts against cracks, a per-update build budget, unloading, any material, and aTerrainShadingcallback for per-vertex attributes (colour, texture-layer weights). Picking uses loaded chunks with an analytic raymarch fallback (floor and ceiling options for water).TileCacheandBuckets: exported for reuse.This is presentation and caching only; it never writes simulation state. The game's own renderer now runs on
TerrainMesh, and its chunk geometry was checked value by value against the original implementation at every LOD.Verification: typecheck, build, 243/243 tests.
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