- src/lib/map/vision.ts (pure, tested): blockingSegments (walls + closed doors),
segment intersection, computeVisibleCells (raycast viewer→cell-centre, sight radius).
- BattleMap += dynamicVision + sightRadiusFeet (Dexie v12, backfilled).
- MapEditor: new "Walls" tool (draw wall polylines; click a door to open/close),
a "Vision" toggle (auto-enables fog and reveals from the party), sight-radius field,
and "Reveal from party". Moving a PC token accumulates revealed cells via LoS when
Vision is on. Doors/walls render for the GM (amber=closed, green=open).
- Networked players need no new protocol: revealed cells already travel in the snapshot.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
NilsBriggen
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