Asteroids · particle-1

Let me build the game. I'll write a complete index.html with canvas rendering, vector graphics, physics, wrapping, asteroids splitting, lives, waves, game over/restart.

Let me write carefully.

Looks good. Now let's test gameplay: click start, then test rotation/thrust/firing. I'll use browser click and key actions.

First click Start Game button at ~(600, 452) in 1200x800 viewport.

The ship isn't visible yet due to invulnerability blinking or overlap? Wait, I see the asteroids spawned. The ship should be at center but it's invisible possibly because of blinking. Let me inspect state, and test keys.

Let me use browser key actions. First check state via inspect (but inspect gives DOM/console only maybe). Let me use bash with playwright? No, browser tool only. I can use inspect? It returns console errors and DOM. There might be a way to evaluate JS—not directly. I could add debug output to DOM, but easier: use screenshots.

Let me press ArrowLeft for a moment and then screenshot. Key action probably presses and releases once? Let me test.

Actually the browser key action likely sends a keydown+keyup. To test thrust we need holding. Maybe repeated key events. Let's check the tool: key action with text e.g. "ArrowUp". It probably dispatches keydown, then keyup. Rotation per frame during hold won't happen with quick tap. Could use motion frames? The 'motion' action captures frames; maybe key held across motion? Unclear.

For verification I can rely on debug hook: window.__asteroids.game. To read values I'd need evaluate. Not available. But I can add a small debug overlay when a query param? Better: I can temporarily add a debug readout to the DOM showing ship angle/velocity/bullet count, then inspect DOM. Or simpler—trust code logic and verify visually via key holds.

Let me try pressing ArrowLeft repeatedly and taking a screenshot to see rotation.

The ship is visible and pointing up-left slightly (rotated left). Rotation works (since tap seemed to rotate somewhat? Actually it points up-left ~15 degrees, which suggests rotation held for multiple frames, maybe keydown persisted?). Good.

Now test thrust: press ArrowUp and screenshot.

The ship appears at basically same position. Thrust tap may have moved slightly (maybe one frame's worth). It's hard to verify from screenshot alone. I need instrumentation to fetch values. Let me temporarily add a debug readout in the DOM (hidden element updated each frame) that shows ship angle, velocity, bullet count, asteroid positions crossing edges. Then inspect DOM. I can keep it hidden or remove later, but it's harmless. Better to add a debug element that's display:none but textContent shows state; the DOM inspector includes text of hidden elements? It might. The DOM output shows text nodes, likely all. Safer: append values to document.title? The DOM output might not include title. Let me add debug div with visibility hidden? Hmm.

Alternatively use bash + puppeteer if available? Check node modules for playwright/puppeteer. The browser tool exists; maybe there's an evaluate action not listed. I'll add a debug overlay that only displays when URL has ?debug. But the DOM inspection in reload shows text content. Actually the observed DOM output seems to be document.body innerText or similar. If I add an element with style display:none, innerText excludes it. Use position:absolute; left:-9999px? innerText may include it. Simplest: add a visible tiny debug text in bottom status line for development, then remove. Actually I can include it in controls line temporarily.

Let me modify: add a span #dbg inside controls, update each frame with angle/vx/vy/bullets. Then inspect. Later remove or keep hidden. I'll do that.

Good, debug works. Now start game by pressing Space (keydown on space starts game? In keydown, if state START and space -> startGame()). Let me press space. Then read state.

Game started. Note debug line now hidden behind? Actually the debug line is cut off at the bottom — content is below viewport (y~780). It shows partially. The DOM still gives values, good.

Now test rotation: key press ArrowLeft then inspect. Earlier single key likely gave long hold? Let's do it and read.

Angle unchanged: -90.0. The key action dispatches keydown then keyup immediately, so with dt-based rotation per frame, no rotation happens (or tiny). Earlier title screen seemed rotated but maybe it wasn't actually; ship always points up. So key tap doesn't hold. I need a way to hold a key. The browser tool has 'motion' which takes frames while maybe keys? Not sure. Could use key with text containing multiple? Perhaps key action sends keydown only? Debug shows angle stays -90 exactly though inv decreased. If keydown persisted, it would rotate. So key action = press+release quickly.

To verify, I can add an automation hook: dispatch keydown events via DOM? Not possible without evaluate. But I can add temporary code that auto-holds keys based on a URL hash or a debug function. Since I control code, I can add a self-test mode triggered by location.hash === "#test" which simulates key holds and logs results to the debug div. That's a solid verification approach. Let me add a test harness that runs when hash includes "test": after start, hold ArrowLeft for 0.5s, then ArrowUp for 0.5s, then fire, sampling values and writing results.

Actually simpler: add an API on window.__asteroids to set keys and start; then use... but I can't call it from browser tool. However, I can implement a query-param driven test inside the page that runs automatically and prints a summary in the debug element. Then reload with #selftest. But reload may not navigate hash—I can just temporarily enable a scripted test in code, reload, read DOM, then remove.

Let me implement a self-test sequence:
- startGame()
- record angle/pos/vel
- set keys ArrowLeft true, wait 30 frames, record angle delta
- ArrowUp true for 40 frames, record velocity
- fire, record bullet count
- Test wrap: set ship.x = 3, vx = -200; run 20 frames; see x near W-...; and asteroid wrap.
- Test split: place bullet at asteroid position / or call splitAsteroid? Better test hit by spawning large asteroid at fixed pos ahead, firing.
- Test life loss: set invuln 0 and place asteroid at ship position -> lives decreases and respawn+invuln.
- Test wave clear: clear asteroids -> after cooldown wave increments.

I'll build a testing harness in the page that runs when location.search contains "autotest", using real update(dt) calls with fixed dt, and prints results to #dbg. Then reload with ?autotest. But browser reload might go to same URL without query. Can I navigate? Not directly. Maybe the page URL can be set via location? I can check location.hash on load; reload likely preserves current URL. I can't set it. Alternative: temporarily make autotest unconditional in init (guarded by a const flag I edit), run, read, then remove. That's fine.

Let me add a temporary autotest that after init resets, disables raf updates interference by setting paused? Actually update() runs via raf regardless. I'll run the test synchronously in init before raf starts, using manual steps with update(dt) and stubbing state. But update() calls handleInput which uses keys and state. I can drive it.

Plan test function:

function runTests(){
  startGame();
  const s = game.ship;
  const a0 = s.angle;
  keys["ArrowLeft"]=true;
  for(let i=0;i<30;i++) update(1/60);
  keys["ArrowLeft"]=false;
  const rotDelta = s.angle - a0;
  const v0 = Math.hypot(s.vx,s.vy);
  keys["ArrowUp"]=true;
  for(let i=0;i<40;i++) update(1/60);
  keys["ArrowUp"]=false;
  const v1 = Math.hypot(s.vx,s.vy);
  const pos1 = {x:s.x,y:s.y};
  // fire
  game.fireCooldown=0; fire();
  const bulletCount = game.bullets.length;
  keys["ArrowUp"]=true;
  for(let i=0;i<20;i++) update(1/60);
  keys["ArrowUp"]=false;
  const pos2 = {x:s.x,y:s.y};
  // wrap test
  s.x = 2; s.y = H/2; s.vx = -120; s.vy=0; s.angle = Math.PI;
  for(let i=0;i<15;i++) update(1/60);
  const wrapped = {x:s.x,y:s.y};
  // asteroid wrap
  const ast = game.asteroids[0]; if(ast){ ast.x=2; ast.y=H/2; ast.vx=-100; ast.vy=0; for(i<10) update; astWrapped.x}
  // split test: create large at ship ahead? Direct: pick a large asteroid; place bullet on it:
  const large = game.asteroids.find(a=>a.size===3);
  ...
}

But careful: update() will trigger ship collision, bullets etc. For the split test, find large asteroid, record count, place a bullet exactly at its position with life 1, call update once; check ast count +1 (large replaced by 2) and score +20.

For life loss: set invuln=0, lives recorded, place asteroid at ship pos and update -> lives-1 and invuln>0 and ship respawn.

For wave clear: set game.asteroids.length=0; run update for 2 seconds (120 frames) -> wave increments and asteroids respawn.

But running all tests sequential changes state; do them in a fresh reset each phase. Also note endGame triggers overlay, fine.

Then print summary into a results element with big clear text, maybe in title? I'll write to #dbg and read DOM.

Need to be aware autotest running in init then raf continues normal play—fine. I'll add a flag const AUTOTEST = true; and after init call runTests() at end, then remove afterward.

Let me add the code. I must ensure update's handleInput on state transitions. I'll reset before each phase.

Implementation details for phases:

Phase 1 (controls):
resetGame(); invulnTimer=0? respawn puts invuln 2.2. Set invulnTimer=999 to avoid collisions, or clear asteroids for control test.
game.asteroids.length=0; // but then wave respawn logic after 1.6s will spawn; tests run < 1.6s per phase mostly. Controls total 70 frames ~1.17s, plus bullets ~0.33s. Could spawn wave mid-test. Set game.waveCooldown = 999 to prevent? The logic: if asteroids empty and waveCooldown<=0 -> set 1.6 then decrement. If I set 999, stays. But if asteroids nonempty it resets to 0. I'll clear and set waveCooldown=0 at start and also after clearing manually set game.waveCooldown = 999? Then update decrements. Fine, but state.PLAY must remain.

Actually for controls test simply clear asteroids and set waveCooldown=999 to disable wave spawn.

Rotation check: angle decreases (left = negative in screen coords). ~30 frames*3.7/60 = 1.85 rad = -106°. Good.
Thrust: velocity magnitude >0 and position changed.
Fire: bullets length 1.

Phase 2 wrap:
resetGame(); invuln=999; clear asteroids; waveCooldown=999; ship.x=3,y=H/2, vx=-200,vy=0; run until x>W/2 (wrapped) -> record max x. Should be near W-... Actually after crossing 0, x becomes W - small. Track whether x > W/2 at some point.

Asteroid wrap similar.

Phase 3 split:
resetGame(); invuln=999; game.asteroids = [makeAsteroid(450,310,3,0,0)]; score before; place bullet at same coords: game.bullets.push({x:450,y:310,vx:0,vy:0,life:1,maxLife:1}); update(1/60); expect asteroids.length 2, score +20, bullet removed.

Small piece removal: clear; add size1 asteroid at 450,310; bullet; update -> asteroids 0, score +100.

Phase 4 life:
resetGame(); asteroids=[makeAsteroid(ship.x, ship.y,1,0,0)]; invuln=0; livesBefore=3; update(1/60); expect lives 2, invuln>0, ship exists and position maybe moved.

Phase 5 game over:
resetGame(); lives=1; asteroids=[at ship]; invuln=0; update -> state GAMEOVER, overlay visible.
Then simulate restart by calling startGame() -> score 0, lives 3, asteroids>0, state PLAY.

Phase 6 wave clear:
resetGame(); asteroids.length=0; waveBefore=1; for 120 frames update(1/60); expect wave 2 and asteroids>0.

I'll collect into an array of strings and write into #dbg. Let me implement with a results overlay perhaps visible for reading. I'll set dbg textContent to result summary and make it larger white for test. DOM read will get it.

Let me write the code. Need access to internal functions (update, resetGame, etc.) since runTests inside IIFE. Add after init() call.

Also note during autotest, the raf loop is also running and mutating state between synchronous test phases? JS single-threaded; synchronous test runs to completion before raf callbacks. Good. But after test, loop continues and might trigger update; that's fine. However the last test leaves state PLAY with wave etc. The debug output will be overwritten by raf's update dbg line each frame! Because update() writes dbg text. I must guard: if AUTOTEST_RESULTS set, skip debug line updates. Or write results into separate element. I'll add a separate div #testout visible and not overwritten. Add to DOM after dbg. Then read DOM. Then remove both after verification.

Let me add.

All tests pass. Now I need to visually test the actual interactive gameplay: hold keys. The key tap works for firing? Fire is on keydown, so tapping Space fires. Let me verify firing visually & a hit/split/score. Also test game over overlay visually maybe by repeated collisions — can use harness? Already tested.

But I should check that firing works with real key events. Earlier pressing Space with state PLAY... In the keydown handler: for space, startGame if START/GAMEOVER, else if PLAY and !paused and !e.repeat fire. On keyup, keys space false. Also handleInput checks keys["space"] with cooldown. Tap gives one shot. Good.

However, there's an issue: in keydown, keys[k]=true where k=" " (actual event.key for space is " "). Then handleInput checks keys["space"] || keys[" "], fine. But keys[" "] stays true until keyup, good.

Let me test real firing by placing... actually normal play, tap space and screenshot with bullets maybe gone quickly. Test by pressing Space then immediately screenshot (frame at 100ms bullet still alive). Let me do motion maybe. Use key Space then screenshot.

Also visual check of thrust flame: key tool doesn't hold. Could use the harness to simulate a frame with keys set and render? I can add a temporary "demo" render... not necessary; thrust logic verified and flame draw code straightforward. But better to verify visually at least once. I could use browser click on canvas? Not relevant.

Maybe the tool's 'key' allows text like "ArrowUp" held? No.

I can do a temporary test by setting keys via runTests? The harness ends with resetGame and normal play. I could add a small demo mode: in init after testing, set keys["ArrowUp"]=true and leave it; then screenshot shows thrust flame and moving ship. But then the page auto-thrusts. I'll do after removal verification, temporarily. Actually simpler: temporarily after runTests set keys["ArrowUp"]=true; keys["ArrowLeft"]=true; reload, screenshot, then remove. Let's do the firing visual test first with Space key (real event).

Also need to remove test harness and debug elements at the end. Before that, visual screenshot while thrusting.

Let me first verify real space firing: press Space and screenshot immediately.

Firing works: bullet visible above ship, ship drifted backward slightly from recoil (interesting—recoil pushed vy 13.5). The bullet appears as a small line above ship. Also asteroid near top-left is wrapping (partially visible).

Now I want a visual of thrust flame and a split. Let me temporarily add auto-thrust and maybe auto-fire demo. Actually I can test split visually by repeatedly firing at the asteroid right above (asteroid at ~667,336 while ship at 450,310 heading up — not aligned). No need; harness verified.

Thrust flame visual: temporarily set keys ArrowUp true in the code after runTests, and maybe rotate slightly. But removing harness afterward makes that pointless. Still, a quick visual sanity check is worthwhile. I'll temporarily append after runTests: keys["ArrowUp"]=true; keys["ArrowLeft"]=true; keys["space"]=true (auto-fire). Then reload/screenshot to see flame and movement. Then remove harness+debug and re-verify final page.

Actually, I could avoid temporary code by modifying runTests to leave keys held before returning. Let me just add after runTests():

if (location.search.indexOf("demo")>=0) ... can't set search. So add unconditional temporarily.

Let's do it, screenshot, then remove.

Thrust flame visible (small yellow-orange near center) with ship moving up-left and rotating. Good.

Now remove all temporary test/debug code and restore final version. Remove:
1. dbg + testout divs
2. debug update block
3. runTests function and invocation + keys demo.

Let me do precise edits.

No python3. Use node? Check. Or edit tool. Let me use the edit tool with exact text. The test harness is long; I can use bash sed to delete ranges safely by markers using awk. Easiest: use node if available.

Let me check node.

Now final page reload and sanity check: title overlay, start, fire, pause, restart. Also check game over overlay appearance maybe via harness no longer available—we tested logic already. Let's reload and take a screenshot, start game, tap space, pause with P, resume, verify no console errors. Also verify final file end-to-end has no leftover unused var issues (rafId etc. fine). Check the death test: hitShip calls respawnShip which invuln 2.6. endGame leaves game.ship=null. Restart works.

One concern: game over overlay button text and title. Fine.

Another concern: after game over via running out of lives while keys held—no issue.

Potential bug: In keydown, pressing Space while GAMEOVER triggers startGame and returns; good, but keys["space"] set true; then keyup resets. Also while START pressing space starts. But the overlay button click also works.

Another: Restart button click while overlay over canvas; startGame resets. Good.

Pause: p toggles; when paused, update skipped, but render still works and ship hidden? Render not updating time, fine. pauseTag visible.

Edge wrap for collision detection: wrapDelta only x; y difference can't exceed H/2 because both coordinates in [0,H). Actually dy could be up to H ≈ 620, and asteroid radii ≤ 52, so no false collision. But near vertical edge, ship at y=1 and asteroid at y=H-1 are visually close; we don't wrap dy. Minor correctness gap for collisions across the top/bottom seam. Should I add y wrap? For consistency, yes. Use wrapDelta for both axes. Let me update all places using dy: collision checks (bullet-asteroid, ship-asteroid) and spawn safe distance. In tests it works. Adding wrapDelta(dy) is more correct. For spawn safe distance, dy should also wrap. Let me fix.

Bullet split: `splitAsteroid` uses indexOf; fine.

Also potential issue: child asteroid inheritance adds to array while iterating bullets—not during asteroid loop, so fine.

Let me add wrapDeltaY (same function with H). Simpler: make wrapDelta(d, span). Update calls.

Places:
- spawnWave: const dx = wrapDelta(x - safe.x), dy = y - safe.y
- hit/ respawn guard: dx=wrapDelta(a.x-s.x), dy=a.y-s.y
- bullet-asteroid: dx, dy=b.y-a.y
- ship collision: dx,dy
- test harness removed.

I'll modify wrapDelta to take span default W and update dy calls.

Then final browser check.

Final title screen good. Now click start, tap space (fire), pause and resume, and check no console errors. Also maybe simulate game over overlay quickly by... harness removed. We already verified it and visually overlay similar structure to title (we haven't seen game over). I could temporarily use browser console? Not available. I could force game over by waiting for collisions, unreliable. Since the Game Over overlay uses same DOM styling and harness confirmed classes, it's fine. But a quick visual could be done by clicking start and waiting ~? Not necessary within budget.

Let me start, fire, and pause.

The ship is invisible at the moment because invulnerability blink (spawn invuln 2.2s and blinking hides half the frames). That's expected. Screenshot captured a hidden frame. Let me tap space to fire and screenshot; likely ship visible then. Also test pause.

The ship appears as a small line? At center I see a tiny vertical white mark (the ship edge) — the ship polygon is very thin because it's a triangle viewed... Actually my ship points: (14,0),(-10,9),(-6,0),(-10,-9). It should look like a classic arrow. At this scale (canvas 900 logical displayed ~1000 px wide, scale ~1.1), 14 px length becomes ~17px, should be visible as a hollow triangle. In the screenshot center there is a tiny vertical line only, maybe because invuln blink and we captured just what? Hmm it looks like only part. Wait, the bullet fired upward from ship. The little mark at center may be the bullet, and the ship is blinking hidden. The bullet appears at center-ish? Ship at (450,310) logical -> screen x ≈ 100+ (450/900*1000)=600, y ≈ 57+310/620*718≈416. The mark at (600,376) is above, likely bullet. So ship hidden due to blink at capture. Fine.

The ship rendering size: 14*1.6? canvas CSS width maybe 1000 while logical 900 => 1.11 scale. So 14px radius ~16px. Reasonable.

But wait—the ship at screenshot earlier near thrust was visible ~? In the prior demo screenshot I saw flame but ship at center was tiny. Let's zoom conceptually: ship points length 24 total, so ~26 px on screen; should be more visible than a tiny line. In demo screenshot, the ship was under the flame maybe. Hmm.

Let me get a screenshot after invuln ends (it lasts 2.2s). By now the previous screenshot was taken after some seconds. The ship blink hides half the frames. If I pause, blink stops (time frozen) and it might be hidden depending on parity. Let me press P twice or wait then screenshot. The blink condition: invulnTimer>0 && floor(time*10)%2===0 -> hidden. So no way to guarantee without waiting. Let me just wait via reload? No, that resets. Instead press 'P' to pause, then take multiple screenshots? Pause freezes parity. Press P twice (pause then resume) and screenshot—50% chance.

Alternatively the tiny mark might actually be the ship drawn very small due to... Wait screenshot shows a white small vertical "I" shape at center, roughly 10px tall. Ship at (450,310): screen x = 100 + 450/(900)*1001 = 600.5; y = 57 + 310/620*718 = 416. The mark is at y≈376, 40 px above center — that matches a bullet that traveled upward ~0.1s*520*1.11≈58px, so bullet. Ship probably hidden. Let me wait a moment (time passes) and take a screenshot; invuln ~2.2s almost done, then ship visible.

Ship visible as arrow pointing up, asteroid wrapping at top-right (partially clipped by edge—that's actually it crossing the edge; it's drawn partly outside the canvas and clipped, not duplicated across the seam. True screen wrapping means position wraps, which it does; visually it's a single object sliding off. That's acceptable for Asteroids-style wrap; some games draw duplicates at seams, but requirement is objects wrap around edges—they teleport when center crosses. Position wrapping verified numerically at x=797.5 etc. Wait that test started at x=3 moving left, ended x=797.5, i.e., it wrapped by adding W. Good.

Hmm, but visually, asteroid at top-right clipped at edge means its center is inside near the corner. Fine.

Now test pause, and confirm no console errors. Press 'p'.

Interesting: Lives dropped to ▲▲ — a collision occurred during the wait. Pause works (PAUSED visible, ship frozen). Ship visible with cyan tint at lower position and a burst particle near center (from collision). Great—this also incidentally demonstrates life loss and respawn/invulnerability.

Now unpause and test game over/restart visually? We have 2 lives left. Could leave it; harness already verified. But maybe test restart control visibility by forcing collisions. Not enough reliable waiting. Could deliberately fly into asteroids using held keys—not possible. We already verified programmatically; the overlay uses same style and button, plus endGame sets text. Confident.

Unpause to ensure game resumes with no console error. Then final cleanup check of index.html for leftover debug. Also verify keydown preventing scroll: body overflow hidden and preventDefault—satisfied.

One last look at code for issues:
- `keys[e.key]` on keyup for 'p' sets keys['p']=false, fine.
- fireCooldown decremented in update; handleInput fire calls fire which sets 0.16.
- When paused, update skipped, so cooldowns freeze; good.
- On game over, update still runs (state PLAY check guards gameplay, particles continue). Ship null, render handles.
- Restart click resets. Start via Space while overlay visible: keydown startGame, but the overlay is still showing because overlay hidden in reset. Good.
- Wave increment: after clearing, 1.6s delay then spawn; waveCooldown reset handling: if asteroids empty and waveCooldown <=0 set 1.6, then decrement same frame. Fine.
- During wave-clear delay, a killed ship? no asteroids, so safe.
- Score display.

Potential issue: game over via collision calls hitShip -> lives-- ; updateHUD; if lives<=0 ship=null; endGame; then after hitShip returns, the collision loop breaks. Fine.

Another potential issue: resetGame -> spawnWave uses game.ship pos at center. Fine.

The ship size 14 vs asteroid radius 15 smallest. Good.

"Start with three lives" yes.

"bullet lifetime bounded" 1.15s.

"prevent gameplay keys from scrolling" preventDefault for arrows/space, body overflow hidden.

"Show controls" yes.

Let me unpause and confirm no errors, then check file lines count and that title/overlay state is correct on initial load (already verified).

Also verify no external resources: grep http.

Unpaused, ship visible (cyan = invulnerable), particles persist stationary because paused. Fine.

Now final static checks: no external URLs, file ends correctly. Also maybe remove `keys` debug hook exposure? window.__asteroids is harmless and useful; keep. But exposing internal game is fine.

Check for leftover `hitFlash` unused logic (never set >0 except default 0); harmless.

One more concern: ship collision after respawn—respawn sets invuln 2.6; the respawn position searches for safe spot. Good.

Also the top-right asteroid is clipped at the corner and only partially drawn. That's expected with center wrap. Some might expect the object to appear on both sides. Requirement "asteroids also wrap" = position wraps. Fine.

Check no CDN and that `rafId` unused warnings—fine.

Let me grep for http/external and validate HTML basic structure. Also run a quick JS syntax check by extracting script? Browser console has no errors, so good.

Final: verify no debug remains (grep done earlier). Check git? no.

Report. But before final, perhaps verify game over overlay visually via temporary quick method? I have time (~few minutes). Given the game is running and lives=2; could wait for collisions but nondeterministic. The harness already confirmed the DOM and state. I'm comfortable.

One more thing: initial overlay shows "ASTEROIDS" title and button "Start Game"; game over sets "GAME OVER" + "Final Score" + "Restart". Verified programmatically. Good.

Final answer summary with checks and unverified behaviors (e.g., visual game over overlay not seen; full wave progression/multiple splits observed only via harness, not visually).

All clean. Final report concise: what was checked and what remains unverified.