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mj 1faf8bd322 navi-offroute: vectorize road_terminus_transitions (O2b, perf) ... Replace the per-road-cell Python 8-neighbour scan with a single 3x3 binary dilation of the off-network mask (scipy.ndimage), AND'd with the road/track mask. `border_value=0` treats out-of-bounds neighbours as on-network, matching the scalar version's OOB skip -- NOT np.roll, which would wrap the raster edges and fabricate phantom neighbours. A road cell is never off-network itself, so dilating with the centre included is equivalent to the loop's strict-neighbour test; the surviving cell set and the 2 directed foot<->vehicle tuples per cell are identical (only emission order differs; cap/kernel are order-independent). Synthetic eyeball benchmark (1234x470, dense road block, worst case for the loop's early-break): scalar 843 ms -> vector 9.3 ms; set-equal True. Targets the ~3.75s road_terminus stage of Route B's gather_transition_cells. Adds test_road_terminus_dilation_no_wrap (np.roll regression guard); existing test_road_terminus_transitions_pure_raster + gather/cost parity tests unchanged. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>		2026-05-28 02:45:18 -06:00
backend	navi-offroute: vectorize road_terminus_transitions (O2b, perf)	2026-05-28 02:45:18 -06:00
frontend	navi-offroute: tighten hybrid gates + fix hybrid render (#34)	2026-05-26 17:29:17 -06:00