Flow-field particles · laguna-xs-2.1
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 · 10 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 me to create a full-screen flow-field particle animation using p5.js. Let me break down the requirements: 1. Use the pre-provided p5.min.js (global mode) 2. Full-screen canvas 3. Thousands of particles advected by Perlin-noise vectors 4. Particles leave fading trails 5. Colors shift over time I need to: 1. First check if p5.min.js exists in the current directory 2. Create an index.html with all the code inline (CSS in <style>, JS in <script>) 3. The JS will use p5.js to create a flow field simulation Let me start by checking the current directory and then create the file.
{"command":"ls -la /workspace"}total 1028 drwxrwxrwx 3 node node 96 Jul 22 16:58 . drwxr-xr-x 1 root root 4096 Jul 22 16:58 .. -rw-r--r-- 1 node node 1034532 Jul 22 16:58 p5.min.js
thinking
Good, p5.min.js is present in the current directory. Now I'll create the index.html file with all the code inline - CSS in a style tag, JS in a script tag, and loading p5.min.js locally. Let me create a flow-field particle animation with: - Thousands of particles advected by Perlin-noise vectors - Fading trails (using a translucent background or alpha-blended particles) - Colors shifting over time - Full-screen canvas I'll use p5.js global mode for simplicity.
/workspace/index.html (3138 bytes)Successfully wrote 3138 bytes to /workspace/index.html
thinking
I've created the index.html file with a full-screen flow-field particle animation. Let me verify the file was created correctly.
{"path":"/workspace/index.html"}<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Flow Field Particle Animation</title> <style> * { margin: 0; padding: 0; box-sizing: border-box; } html, body { width: 100%; height: 100%; overflow: hidden; background: #000; } canvas { display: block; } </style> </head> <body> <script src="p5.min.js"></script> <script> // Flow field particle animation with thousands of particles // Particles advected by Perlin-noise vectors, leaving fading trails const NUM_PARTICLES = 3000; const FIELD_RES = 50; const TRAIL_DECAY = 15; let particles = []; let flowField = []; let timeOffset = 0; class Particle { constructor() { this.pos = createVector(random(width), random(height)); this.v = createVector(); this.colorOffset = random(TWO_PI); this.age = 0; } update() { let index = floor(this.pos.x / FIELD_RES) + floor(this.pos.y / FIELD_RES) * floor(width / FIELD_RES); if (index >= 0 && index < flowField.length) { this.v = flowField[index].copy(); } this.pos.add(this.v); this.pos.x = (this.pos.x + width) % width; this.pos.y = (this.pos.y + height) % height; this.age++; } display() { let hue = (frameCount * 0.5 + this.colorOffset) % 360; let sat = 80 + sin(frameCount * 0.01 + this.colorOffset) * 20; let bri = 60 + cos(frameCount * 0.007 + this.colorOffset) * 40; let ageFactor = min(1, this.age / 500); let alpha = 255 * (1 - ageFactor * 0.3); stroke(hue, sat, bri, alpha); point(this.pos.x, this.pos.y); } } function generateFlowField() { flowField = []; let rows = ceil(height / FIELD_RES); let cols = ceil(width / FIELD_RES); for (let y = 0; y < rows; y++) { for (let x = 0; x < cols; x++) { let angle = noise(x * 0.01 + timeOffset, y * 0.01 + timeOffset, timeOffset * 0.5) * TWO_PI * 3; let v = createVector(cos(angle), sin(angle)).mult(0.5); flowField.push(v); } } } function setup() { createCanvas(windowWidth, windowHeight); colorMode(HSB, 360, 100, 100, 255); strokeWeight(2); smooth(); generateFlowField(); for (let i = 0; i < NUM_PARTICLES; i++) { particles.push(new Particle()); } } function draw() { // Fading trails effect fill(0, 0, 0, TRAIL_DECAY); rect(0, 0, width, height); // Update flow field over time timeOffset += 0.005; generateFlowField(); // Update and display particles for (let p of particles) { p.update(); p.display(); } } function windowResized() { resizeCanvas(windowWidth, windowHeight); particles = []; generateFlowField(); for (let i = 0; i < NUM_PARTICLES; i++) { particles.push(new Particle()); } } </script> </body> </html>
thinking
The file is created successfully. Let me verify it exists in the current directory.
{"command":"ls -la /workspace/index.html"}-rw-r--r-- 1 node node 3138 Jul 22 16:58 /workspace/index.html
thinking
The index.html file has been created successfully. Let me verify the structure is correct by checking the file exists and has the proper content.
Done! I've created `/workspace/index.html` with a full-screen flow-field particle animation using p5.js. Here's what it includes: **Features:** - **3000 particles** advected by a Perlin-noise flow field - **Fading trails** achieved by overlaying a semi-transparent black rectangle each frame (TRAIL_DECAY = 15) - **Color shifting** using HSB color mode with: - Hue cycling over time (`frameCount * 0.5`) - Saturation pulsing with sine wave - Brightness oscillating with cosine - Particles fade slightly as they age - **Dynamic flow field** that evolves over time with a time offset - **Full-screen responsive** canvas that adapts to window resizing - **Seamless wrapping** - particles wrap around screen edges **Technical approach:** - Uses global mode p5.js (as specified) - Flow field resolution of 50px grid cells - Particles query the flow field based on their position and move according to the vector at that cell - The flow field vectors are generated using 3D Perlin noise with time as the z-coordinate for animation The animation runs fully sandboxed with no external resources - all CSS is in the `<style>` tag and all JS is in the `<script>` tag inline.
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
Flow-field particle animation with fading trails and shifting colors runs continuously, unaffected by mouse/keyboard input but visually matches the prompt well.
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.