Review follow-up to the D5 fix. Two changes in grid.js _buildField:
- The road-over-floor preference smoothing is 0.1.0's again: its line of sight
may cover non-blockable tiles (Bresenham footprint, diagonal-step corners
included) only on the tile's own raw chain, and the jump stops at the first
ancestor it cannot see so. Exact crossings (a corner touch is not a crossing)
are used only to choose between the official and the preference pointer.
The previous version let the preference brush the corner of off-chain floor,
so on 战场#02's Final Assault the right-half exit route (2,10) -> (3,11)
slipped past an operator on (2,11) while the left half was still blocked on
(2,9). Both halves now mirror each other again ((2,10) -> (2,11) -> (4,11)).
- On an equal floor count the official pointer stays; the preference pointer
wins only when it merely skips a collinear official waypoint (same walk).
The old "farther waypoint" tie-break could bend an official route without
saving any floor, e.g. a crate on (10,6) of 战场#04 brought back the L via
(9,8) for the lower gate.
Still 140 of 154 stage routes official; data/stages.json groundPaths
regenerated (战场#02 boss right exit back to 0.1.0's, device-less helper paths
of #03 / #04 / #06 follow the same rule). New tests: 战场#02 boss exits mirror
and are blocked beside the exit; a single crate on any tile of an active stage
never leaves a gate route non-official without crossing strictly less floor.
The cross-check reference port follows both rules.
sganggs
7a3918eab9