96 lines
4.9 KiB
Markdown
96 lines
4.9 KiB
Markdown
# SNAKE — Xiaomi Watch S4
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Textured Snake on a 16×16 grid: 20px tiles, 320px board, centered on a round
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466px screen. Existing PNG board, directional snake pieces, apple and icon are
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preserved. Package identity: `com.ilias.snake`.
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**Version 0.7 (versionCode 7): locally tested and release-built; the new features
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still need an on-watch check.** Earlier versions rendered and played on the
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user's Watch S4 41mm. Node tests and numeric layout checks are not device tests.
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## Play
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- **Swipe** to steer. A two-turn queue accepts rapid corners, consumes one turn
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per tick, and rejects duplicate directions and reversals against the last
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queued direction. Excess inputs are ignored, not allowed to replace a turn.
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- **Tap the board, snake or apple** to pause. Tap **RESUME** (or an exposed part
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of the board) to resume. Pausing clears queued turns.
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- In the pause or game-over panel, select **CLASSIC** (walls end the run) or
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**WRAP** (cross an edge to appear on the opposite edge). Changing mode starts
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a fresh, paused game; tap RESUME to begin. Selecting the current mode does not
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reset the run. The current mode is shown below the board.
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- Both modes end on self-collision. Moving into the vacating tail is legal.
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- **PLAY AGAIN** is a large 216×56px retry target. Retry keeps the selected mode,
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resets score/speed/queued turns, and starts playing. Filling the board displays
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**YOU WIN** and hides the apple safely.
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- Leaving the page pauses it and stops the timer. Returning requires an explicit
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resume; game-over never resumes automatically. The system back action remains
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untouched. No crown, rotary, side-button or back interception APIs are used.
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## Score, speed and persistence
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Each apple is one point. The always-visible header shows score and best. One
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best score is shared across Classic and Wrap, saved through documented
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[`@system.storage`](https://iot.mi.com/vela/quickapp/en/features/data/storage.html)
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under `snake.best`. Mode is session-only; a newly created page defaults to Classic.
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The movement interval starts at **300ms**, decreases by **10ms per apple**, and
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never goes below **120ms**. Only one movement timer runs; none runs while hidden,
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paused, finished or destroyed. Old timer callbacks are invalidated.
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Storage reads merge with the in-memory maximum; writes wait for the initial
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read and are serialized/coalesced so slow callbacks cannot overwrite a newer
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record. The coordinator survives page recreation within the module lifetime.
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Invalid saved values are ignored. Errors/exceptions do not interrupt gameplay:
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failed reads/writes retry on later apples or page-show activity, without a retry
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loop. A failed/uncompleted write or immediate app termination may lose the
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unsaved record. Storage persistence still needs verification on the watch.
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## Lightweight rendering
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Directional PNG tiles use only `left`/`top` positioning, no transforms or new
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art assets. Wrapped neighbors are normalized before classifying seam textures.
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Food placement takes at most 256 cell checks, including a nearly full board.
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The HUD, footer, board and overlay fit the circular chord numerically with
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at least an 8px total horizontal safety allowance.
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## Build and test
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```bash
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npm ci
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npm test
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npm run release
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```
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`npm test` runs the original core, piece and page tests, 13 incremental upgrade
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regressions, the numeric layout suite, and deterministic randomized property tests. Upgrade coverage includes rapid
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swipes, lifecycle/timer races, storage failures and async ordering, mode changes,
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all four Wrap edges, seam textures, full-board victory and bounded food spawning.
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New behaviors were exercised through failing-then-passing test cycles.
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Release output: `dist/com.ilias.snake.release.0.7.rpk`. The locked
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`aiot-toolkit` 2.0.5 uses the existing `sign/private.pem` and `sign/certificate.pem`;
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do not regenerate or commit those keys. Release uses plain JS (not JSC/protobuf),
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matching the previously working toolchain. The dependency lock is unchanged;
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`npm ci` currently reports 14 development-toolchain audit findings (3 low,
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11 high). No forced toolkit upgrade was applied.
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## Files
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- `src/pages/index/index.ux`: round-screen UI, swipe queue, game/lifecycle state.
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- `src/common/snake.js`: movement, collision, Wrap piece classification, food.
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- `src/common/best.js`: asynchronous storage coordinator.
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- `src/common/tex/`: preserved textured artwork.
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- `tests/{snake,pieces,page,upgrade,layout,properties}.cjs`: Node regression suites.
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Install the signed RPK through AstroBox. Source/releases live at
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https://gitea.oimcloud.myaddr.tools/codex-bot/vela-snake — publication is a
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separate step after review; a local build is not evidence of a published release.
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## Earlier versions
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- 0.2/0.3: board played on watch; designWidth 480→466 fixed undersizing.
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- 0.6: directional textured tiles and preserved user-supplied icon.
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- 0.7: queued swipes, live/persisted records, capped acceleration, pause/resume,
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lifecycle safety, retry/win panels and selectable Classic/Wrap.
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