Flow-field particles · qwen3.8-max
Using the pre-provided p5.min.js (global p5, instance or global mode), create a full-screen flow-field particle animation: thousands of particles advected by Perlin-noise vectors, leaving fading trails, with colors shifting over time.
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Using the pre-provided p5.min.js (global p5, instance or global mode), create a full-screen flow-field particle animation: thousands of particles advected by Perlin-noise vectors, leaving fading trails, with colors shifting over time.
thinking
Write a single index.html that loads p5.min.js, in a fullscreen canvas, implementing a flow field via noise, particles with fading trails (a translucent rectangle overlay), and hue shifting.
{"command":"ls -la /tmp/ws"}total 1012 drwxr-sr-x. 2 node node 23 Aug 3 23:53 . drwxrwsrwx. 3 root node 16 Aug 3 23:53 .. -rw-r--r--. 1 node node 1034532 Aug 3 23:53 p5.min.js
thinking
Create index.html that includes a flow field animation. Use global mode. Fading trails: draw a low-alpha dark rectangle onto the background every frame. Use colorMode(HSB), and make the hue shift according to time + position.
/tmp/ws/index.html (5686 bytes)Successfully wrote 5686 bytes to /tmp/ws/index.html
thinking
A quick sanity check on whether p5.min.js exists and is a valid script — it exists. Maybe I should validate the JS syntax with node? This script uses p5 globals; it can't easily be run in node. But at least I can check the syntax: extract the script and run node --check on it. `class Particle` uses the global p5.Vector — syntax check only.
{"command":"cd /tmp/ws && python3 -c \"\nimport re\nhtml = open('index.html').read()\nm = re.findall(r'<script>(.*?)</script>', html, re.S)\/bin/bash: line 1: python3: command not found Command exited with code 127
thinking
There is no python3. Please use node itself to extract the script.
{"command":"cd /tmp/ws && node -e \"\nconst fs = require('fs');\nconst html = fs.readFileSync('index.html','utf8');\nconst m = html.match(/<SYNTAX_OK -rw-r--r--. 1 node node 5688 Aug 3 23:53 index.html -rw-r--r--. 1 node node 1034532 Aug 3 23:53 p5.min.js
thinking
One bug check: `hueBase = (hueBase + HUE_SPEED * (now - (draw._prev || now)) / 1000) % 360;` — on the first frame, draw._prev is undefined, so it becomes (now - now)=0, no problem. After that, it uses the previous frame's timestamp. This works, but it's a bit unconventional. OK. Also, p5's `constrain` works. Done.
Done. `/tmp/ws/index.html` is a single self-contained file (inline CSS + JS, loads only the local `p5.min.js` via a plain `<script src>` tag) and its script passes a syntax check. **What it does:** - **Full-screen canvas** — `windowWidth × windowHeight`, with `windowResized` handling - **~2,600 particles** advected by a Perlin-noise vector field (`noise(x, y, z)` → angle), with the field's z-dimension slowly evolving so the flow morphs over time - **Fading trails** — each frame draws a near-black rect at alpha 14 over the previous frame, so particle line segments dissolve gradually; edge-wrapping jumps the "previous" point to avoid streaks across the screen - **Shifting colors** — HSB palette where hue drifts continuously over time (~4°/s) plus per-particle jitter and spatial noise variation, with alpha tied to particle lifespan - **Delta-time integration** so speed stays consistent across frame rates **Interactions:** - Move the mouse → creates a local vortex that bends the field around the cursor - Click → scatters nearby particles outward - Any key → reseeds the noise field and palette Just open `index.html` in a browser (or `xdg-open` it) — no network needed.
TAKE IT TO CODE
A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.
RUN
EVALUATION
Animated flow-field visualization that reacts to mouse, click, wheel, and keyboard with color/shape shifts and constant self-animation.
Vision grade · anthropic/claude-sonnet-5
MEASUREMENTS
Raw readings from the capture, not a verdict — the grade above is the only judgement. Percentages are how much of the screen changed; the measure under-reports sparse motion on a dark background.