99468cd379
Sim: clamp knockback under tile size (wall tunneling), bomb/ball terminal velocity, grapple constraint no longer drags players into terrain, bite window ends on getting hit, shield/boost cleared on death, spawn invuln preserved through countdown, spike/saw events only on real damage. Mapgen: spawn footprint validation (was embedding dogs in 58% of seeds), saw paths rejected if they grind terrain or sweep spawns, towers no longer hang slabs over pits. Net: heartbeat+watchdog for dead peers, broker-error tolerance once P2P link is up, join/host reentrancy guards. UI: text-field keystrokes no longer hit game hotkeys, audio unlocks on mouse, textBaseline leak, snapshot carries onGround/landT so client dogs animate.
26 lines
2.8 KiB
Markdown
26 lines
2.8 KiB
Markdown
# MAP.md — Barkour code index
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Vanilla-JS canvas game, no build step. ES modules under `js/`, served statically.
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- `index.html` — DOM shell: all screens (menu/host/join/charselect/game/result) as overlay divs; loads PeerJS from CDN (online play only), then `js/main.js`.
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- `style.css` — overlay/menu styling; canvas letterboxed to 16:9 via CSS.
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- `js/consts.js` — grid (TILE=12, 80×45 → 960×540), tile enum `T`, input bitmask `B`, item ids, physics constants, snapshot rate.
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- `js/rng.js` — seeded mulberry32 (`makeRng`); `randomSeed()` is UI-side only.
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- `js/mapgen.js` — `generateMap(seed)`: ground heightmap, pits, towers, islands, one-way platforms, crystals (hp 3), pads, spikes, rail saws, spawns; `PALETTES`; `sawPos()` polyline eval (ping-pong or loop).
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- `js/physics.js` — center-based AABB vs tile grid: `moveEntity` (per-axis, one-way platform aware), `raycast`, `boxFree`, `standingOnPlat`.
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- `js/characters.js` — `CHARS` data (stats + visual params) and `updateCharacter()`: per-dog special movement (air dash / charge+pound / grapple constraint / blink / jetpack).
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- `js/sim.js` — **authoritative, DOM-free sim**: `createGame`, `step(game, inputs)` (60 Hz), combat (`hurt`: damage% → knockback), mining/items/hazards/KO/respawn/match-end, `snapshot`/`applySnapshot` for netplay.
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- `js/input.js` — keyboard → bitmasks; slot 0 = WASD+FGH, slot 1 = arrows+KL;.
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- `js/net.js` — PeerJS wrapper: `hostRoom`/`joinRoom`; room key = host peer id suffix; signaling via PeerJS cloud, game traffic pure P2P. Runs a 2s heartbeat + 8s watchdog (WebRTC close events are unreliable); broker `network` errors are ignored once the data channel is up.
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- `js/render.js` — canvas: cached seeded background, tiles, procedural dog drawing, particles/ghosts driven by sim events (`fxEvents`), HUD, banners.
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- `js/audio.js` — WebAudio-synthesized sfx; `playEvents` maps sim events → sounds.
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- `js/main.js` — app state machine: screens, char select, three match drivers (local / host / client) sharing one rAF fixed-timestep loop.
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- `test/smoke.mjs` — `npm test`: headless mapgen determinism + chaotic full matches + targeted mining/stocks scenarios.
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## Conventions & gotchas
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- **Client never simulates.** In netplay the joiner only sends input bits and renders `applySnapshot` state; anything render reads must survive the snapshot round-trip (player `st` is re-shaped there).
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- **Sim events are the only side-channel**: fx, audio, *and* client tile mutations (`tile`/`crack` events) ride on them. Host accumulates `pendingEvs` between snapshots.
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- All sim/mapgen randomness must use the seeded RNG — never `Math.random()` inside `js/sim.js`/`js/mapgen.js`/`js/characters.js` paths.
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- Velocities must stay < TILE (12 px/tick) or AABB collision tunnels.
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- 7 as an arc end-angle in render means "> 2π" (full circle), a deliberate shorthand.
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