Flow-field particles · qwen3.5-plus-20260420
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.
transcript · 8 messages
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
The user wants a full-screen flow-field particle animation using p5.min.js. Let me first check that p5.min.js exists in the current directory, then create the index.html file. Key requirements: 1. Single self-contained index.html file 2. Uses pre-provided p5.min.js (local file) 3. Full-screen flow-field particle animation 4. Thousands of particles advected by Perlin-noise vectors 5. Fading trails 6. Colors shifting over time 7. No external CDNs or network requests Let me check the file exists first, then build the complete app.
{"command":"ls -la /tmp/ws/p5.min.js"}-rw-r--r--. 1 node node 1034532 Aug 1 20:25 /tmp/ws/p5.min.js
thinking
The file exists. Let me create a beautiful flow-field particle animation with: - Full-screen canvas - Thousands of particles advected by Perlin noise vectors - Fading trails (using semi-transparent background clearing) - Colors shifting over time - Using p5.min.js in global mode Let me design this carefully: 1. Full-screen canvas using p5 instance mode or global mode 2. ~3000-5000 particles 3. Perlin noise flow field (2D or 3D for time-varying) 4. Fading trails: instead of clearing the background each frame, draw a semi-transparent rect 5. Color shifting: use HSL color mode and shift hue over time based on particle index and time 6. Multiple noise layers or 3D noise for evolving flow field Let me write this all in one index.html file.
/tmp/ws/index.html (4918 bytes)Successfully wrote 4918 bytes to /tmp/ws/index.html
thinking
The user wants me to verify the file is present and correct. Let me do a quick check.
{"command":"ls -la /tmp/ws/index.html && echo \"---\" && wc -l /tmp/ws/index.html"}-rw-r--r--. 1 node node 4918 Aug 1 20:25 /tmp/ws/index.html --- 194 /tmp/ws/index.html
Done. `/tmp/ws/index.html` is a self-contained full-screen flow-field particle animation. Here's what it does: **Core mechanics:** - **4,000 particles** advected by a Perlin-noise-derived flow field - Noise field slowly drifts over time via a z-offset parameter, creating evolving, organic patterns - A **spatial hash grid** (20px cells) precomputes flow vectors so we avoid calling `noise()` per particle per frame — keeping it fast **Visual features:** - **Fading trails** — each frame draws a semi-transparent black rectangle over the canvas, creating the classic long-exposure glow effect - **Color-shifting hues** — each particle has its own base hue, which continuously shifts over time, producing waves of color across the field - Particles have varied **size, brightness, saturation, and lifespan** for visual depth - **Life-based alpha fade** — particles fade in and out smoothly using a sine envelope **Interactions:** - **Click** — spawns a burst of 50 particles at the cursor with random velocities - **Press `R`** — resets the entire canvas - **Press `S`** — saves a screenshot as PNG - **Window resize** — adapts the canvas to fill the viewport
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
Thousands of colorful particles flow in swirling flow-field trails with fading colors, continuously animating regardless of input.
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.