Flow-field particles · glm-4.7-flash

Let me build the index.html with p5 flow field. Check files present.

Let me clean up the draw loop — there's a leftover stray fill (the first sk.fill is immediately overridden, harmless but sloppy). Let me remove it. Then test in the browser.

No errors in console — good. I can't view screenshots (model doesn't support images). Let me verify via DOM/console by evaluating JS state. The browser tool doesn't have an eval action... I only have inspect, screenshot, motion, click, etc. Console shows no errors, which is good. Let me try motion to sample frames, though I can't see images. Hmm, "images: model does not support images" — so I can't visually verify. I can at least check console errors over time.

Let me check that things like the alpha value make sense: sk.colorMode(HSB, 360, 100, 100, 100) — alpha max 100. Alpha = 55 + 25*sin → 30–80, good. Fade fill alpha 5.5 out of 100 — subtle fade per frame; trails last ~ (dark overlay coverage). With alpha 5.5/100 each frame the trails fade with half-life ~12 frames. Reasonable.

One concern: performance with 2600 particles and noise calls — noise per particle per frame. Fine.

Try motion action to see if it captures frames without error.

No console errors after animation ran (motion sampled frames). Since I can't see screenshots, I'll verify behavior programmatically as much as possible. The browser tool doesn't expose eval. I could inject a test harness? I can't add scripts to the running page via this tool.

Alternative: run a headless check via node? p5 requires DOM/canvas. Could use node with a minimal canvas mock — heavy. Better: reason through code and rely on console checks at different times.

Let me click Pause and Restart, then inspect console for errors.

No errors after pause/resume/restart and continued motion sampling. The only console entry is the sandbox warning from the runner itself, not from my code.

Since screenshots aren't viewable by me, my verification is limited to: no console errors across animation run, pause/resume clicks, restart, and post-restart motion sampling. Logic-level verification of coherent motion: angle from 3D Perlin noise sampled at neighboring particle positions varies smoothly, so nearby particles get similar angles — coherent by construction. Colors vary via per-particle hue drift plus field-time modulation. Field evolves via zOff increment each frame, never repeating. Population is a fixed array of 2600 particles, recycled by wrapping at boundaries and life-based respawn — no growing trail history (trails are achieved via translucent fade rect, not history arrays).

One check I can still do: verify the alpha math. colorMode(HSB, 360, 100, 100, 100): fill alpha max 100. 5.5 → trails fade over ~40 frames. Line alpha 30–80 visible. Good.

One potential issue: sk.clear() in resetAll then background — fine. windowResized repaints background — fine.

Also check initial "Pause/Resume" button text toggling — the DOM shows "Pause\nRestart", which is initial. After clicking pause the text would change to Resume; the inspect after clicks shows "Pause\nRestart" again since I resumed on second click. Consistent.

Done. Report.