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## Summary Adds two pieces of pathfinding tooling on top of PR #2448's lazy `.swb` infrastructure: - **`PathfindRecorder`** — admin-toggled JSONL telemetry capture; one record per `BitmapAStarAlgorithm.Find` call. Output format matches the BDN harness corpus, so production traffic can be captured and replayed in benchmarks without an adapter. - **Public bake helpers on `StepCache`** — `ComputeLiveTileDataHash`, `TryReadTileDataHashFromFile`, `BakeMap`, `ClearResidentChunks`. Lets the benchmark project (and any future bake utility) drive cache fill + persist without exposing internal types. The companion BDN harness update lives in [ModernUO-Benchmarks#kb/pathfinding-pr4-bench](https://github.com/modernuo/ModernUO-Benchmarks/tree/kb/pathfinding-pr4-bench): porting `Benchmarks/PathfindInGame/` from the `kb/ai_pathfinding` branch to the API shipped in #2446–#2448. ## What's in this PR ### `PathfindRecorder` (`PathfindRecorder.cs`) - Holds a single `StreamWriter` open while recording; its internal buffer absorbs per-record writes without per-call `File.AppendAllText`. - Single `bool` check on the hot path; cheap when disabled. - Disabling flushes + disposes; an IO failure during write also disables the recorder. - Server config: - `pathfinding.recorder.enable` — bool, default `false`. Read on boot via `GetOrUpdateSetting`. - `pathfinding.recorder.path` — default `<basedir>/Data/Pathfinding/recordings/pathfinds.jsonl`. - Hooked into `BitmapAStarAlgorithm.Find` — runs once per call, does nothing when disabled. - Admin command: `[PathRecord [on|off|flush|status]` (default `status`). ### Public cache helpers - `static ulong StepCache.ComputeLiveTileDataHash()` — wraps the file module's hash function for staleness checks. - `static bool StepCache.TryReadTileDataHashFromFile(string, out ulong)` — peeks at a `.swb` file's hash field (20 bytes). - `int StepCache.BakeMap(int, string)` — walks every chunk in the map, populates resident set, saves. Offline / fixture use; blocks for many seconds on a full-map walk. - `void StepCache.ClearResidentChunks()` — drops chunks + zeros counters but keeps lazy readers open. Lets benchmark loops measure "first query after boot" cost across iterations without the lazy-reader reopen overhead. |
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| TileMatrix.cs | ||
| TileMatrixLoader.cs | ||
| TileMatrixPatch.cs | ||