fix: resolve unit pathfinding vibration around buildings#1064
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Root cause: dual pathfinding system conflict where building avoidance steering forces were applied on top of crowd navigation velocities, causing oscillation at building corners. SC2-style architecture changes: - Remove building avoidance forces for crowd-navigated ground units (navmesh TileCache already routes around buildings) - Keep building avoidance only for flying units and fallback paths - Simplify hard collision resolution (remove push buffer that caused ping-pong oscillation) - Increase navmesh walkable radius (0.6 -> 0.8) for better clearance - Add priority-based push-through (moving units push idle units) - Update collision config with wider margins and gentler stuck detection Key insight: SC2 separates concerns - navmesh handles buildings, boids handle unit-to-unit spacing. Mixing them causes conflicts. https://claude.ai/code/session_01WMrGYxn1NPTPcGn9XCykRh
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Root cause: dual pathfinding system conflict where building avoidance steering forces were applied on top of crowd navigation velocities, causing oscillation at building corners.
SC2-style architecture changes:
Key insight: SC2 separates concerns - navmesh handles buildings, boids handle unit-to-unit spacing. Mixing them causes conflicts.
https://claude.ai/code/session_01WMrGYxn1NPTPcGn9XCykRh