FA-86383 / Procedural level generation constraints / Member archive

Level reachability flood fill: Doors are treated as walls · case 03

Rooms behind doors are reported unreachable.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

grid rows of '#' wall, '.' floor, 'D' door (passable), '~' water (passable only when swim) and 'E' exit. From start [row, col], 4-neighbour flood fill. Returns {reachable: number of reached cells including start, exit: whether an E cell was reached}.

Why this case matters

Procedural generators silently emit unplayable or unfair levels when a single constraint check uses the wrong boundary, axis, neighborhood or update order; the defect is visible in exact generated geometry.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
door corridor #1	`{"exit": false, "reachable": 1}`	`{"exit": true, "reachable": 3}`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.