docs(plan): indoor walkable-plane BSP port — implementation plan

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Five tasks (TDD throughout):
1. Extend FindWalkableInternal signature with ref ushort hitPolyId
   (mechanical, two existing callers pass discards).
2. Add BSPQuery.FindWalkableSphere wrapper + 4 unit tests
   (two-floors-foot-between, only-upper-floor-foot-above, no-walkable-
   in-range, steep-poly-rejected).
3. Refactor TryFindIndoorWalkablePlane through BSPQuery.FindWalkableSphere
   with sphereRadius thread + WalkableAllowance save/restore, delete
   PointInPolygonXY, update single callsite, integration test for
   two-overlapping-floors + allowance-preservation.
4. Add [indoor-walkable] probe line on existing PhysicsDiagnostics flag.
5. Visual verification by user + roadmap + ISSUES #83 close.

Spec: docs/superpowers/specs/2026-05-19-indoor-walkable-plane-bsp-port-design.md

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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Erik 2026-05-19 21:18:11 +02:00

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