feat(nav): renderoni/nav — tiled grid A*, expedition router, spatial hash - #41
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…atial hash
NavGrid is generic over a NavCostField the game supplies (size, cellCost,
optional coarseWalkable/passable). Tiles are sampled lazily and LRU-evicted
(evicted arrays are pooled), blockers are re-applied on rebuild, and A* runs
in a bounded window with generation-stamped scratch and a typed-array heap.
Cell size, tile size, tile cap, window, budget, easy-cost and blocker slack
are options; defaults reproduce the Sunder March grid exactly.
ExpeditionRouter joins complete local paths into long corridors against a
small RouterNav interface. SpatialHash<T> works over anything with a
position {x, z}.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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A new
renderoni/naventry point: grid pathfinding for large worlds, extracted from a shipping game.NavGrid: generic over aNavCostFieldthe game supplies (size,cellCost(x, z), optionalcoarseWalkable/passablefor far-away queries that must not build tiles).nearestWalkable,lineClear,segmentWalkableandprewarm.ExpeditionRouter: joins complete local paths into long corridors across the map against a smallRouterNavinterface, with a ticketed request API.SpatialHash<T>: a neighbour-query grid over anything withposition: { x, z }.The game now supplies only its cost rules (water, cliffs, slope, roads) and uses these classes directly. Its 496-test suite passes on them, including long-range navigation tests.
Verification: typecheck, build, 246/246 tests.
🤖 Generated with Claude Code