Flow-field particles · seed-2.0-code
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
Let me understand what the user is asking for: 1. A full-screen flow-field particle animation using p5.js 2. Thousands of particles advected by Perlin-noise vectors 3. Fading trails 4. Colors shifting over time I need to create a single HTML file with inline CSS and JS, using the pre-provided p5.min.js. Let me plan this: 1. Set up p5.js in global mode (simplest for this kind of animation) 2. Create a full-screen canvas 3. Implement a particle system with many particles 4. Use Perlin noise to create a flow field 5. Add fading trails (using semi-transparent rectangles or blending) 6. Implement color shifting over time Let me write the code:
/tmp/ws/index.html (5726 bytes)Successfully wrote 5726 bytes to /tmp/ws/index.html
thinking
The user asked me to create a full-screen flow-field particle animation using p5.min.js, which I've done. Let me verify that the file is complete and working by checking it again, and then confirming. The animation features: 1. 3000 particles advected by Perlin-noise vectors 2. Fading trails using HSB color mode with alpha transparency 3. Colors shifting over time (hueOffset continuously increments) 4. Full-screen canvas that resizes with the window 5. Interactive element: clicking randomizes the flow field scale and noise speed The file uses the pre-provided p5.min.js and is a single self-contained HTML file with inline CSS and JS. I should now verify that the file exists and is correct.
{"path":"/tmp/ws/index.html","offset":1,"limit":50}<!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; } body { overflow: hidden; background: #000; } canvas { display: block; position: fixed; top: 0; left: 0; } </style> </head> <body> <script src="p5.min.js"></script> <script> let particles = []; let flowField = []; let cols, rows; let scl = 20; let w, h; let hueOffset = 0; let noiseZ = 0; let noiseSpeed = 0.003; let numParticles = 3000; class Particle { constructor() { this.pos = createVector(random(width), random(height)); this.vel = createVector(0, 0); this.acc = createVector(0, 0); this.maxSpeed = random(1.5, 3.5); this.hue = random(360); this.size = random(1, 3); this.trailLength = random(3, 7); this.trail = []; } [136 more lines in file. Use offset=51 to continue.]
thinking
The file looks good so far. Let me check the rest to make sure it's complete.
{"path":"/tmp/ws/index.html","offset":51,"limit":150}follow() { let x = floor(this.pos.x / scl); let y = floor(this.pos.y / scl); let index = x + y * cols; if (index >= 0 && index < flowField.length) { let force = flowField[index]; this.applyForce(force); } } applyForce(force) { this.acc.add(force); } update() { this.trail.push({x: this.pos.x, y: this.pos.y}); if (this.trail.length > this.trailLength) { this.trail.shift(); } this.vel.add(this.acc); this.vel.limit(this.maxSpeed); this.pos.add(this.vel); this.acc.mult(0); this.hue = (this.hue + 0.2) % 360; } show() { colorMode(HSB, 360, 100, 100, 1); for (let i = 0; i < this.trail.length; i++) { let alpha = (i / this.trail.length) * 0.6; let pointHue = (this.hue + hueOffset) % 360; stroke(pointHue, 70 + (i / this.trail.length) * 30, 90, alpha); strokeWeight(this.size * (i / this.trail.length + 0.3)); if (i > 0) { line(this.trail[i-1].x, this.trail[i-1].y, this.trail[i].x, this.trail[i].y); } } let finalHue = (this.hue + hueOffset) % 360; stroke(finalHue, 100, 100, 0.8); strokeWeight(this.size); point(this.pos.x, this.pos.y); } edges() { if (this.pos.x > width + 10) { this.pos.x = -10; this.trail = []; } if (this.pos.x < -10) { this.pos.x = width + 10; this.trail = []; } if (this.pos.y > height + 10) { this.pos.y = -10; this.trail = []; } if (this.pos.y < -10) { this.pos.y = height + 10; this.trail = []; } } } function setup() { w = window.innerWidth; h = window.innerHeight; createCanvas(w, h); cols = floor(w / scl) + 1; rows = floor(h / scl) + 1; for (let i = 0; i < numParticles; i++) { particles.push(new Particle()); } background(0); colorMode(HSB, 360, 100, 100, 1); } function draw() { background(0, 0, 0, 0.08); let yOffset = 0; for (let y = 0; y < rows; y++) { let xOffset = 0; for (let x = 0; x < cols; x++) { let index = x + y * cols; let angle = noise(xOffset, yOffset, noiseZ) * TWO_PI * 3; let v = p5.Vector.fromAngle(angle); v.setMag(0.3 + noise(xOffset, yOffset, noiseZ) * 0.4); flowField[index] = v; xOffset += 0.1; } yOffset += 0.1; } noiseZ += noiseSpeed; hueOffset = (hueOffset + 0.3) % 360; for (let particle of particles) { particle.follow(); particle.update(); particle.edges(); particle.show(); } } function windowResized() { w = window.innerWidth; h = window.innerHeight; resizeCanvas(w, h); cols = floor(w / scl) + 1; rows = floor(h / scl) + 1; background(0); } function mousePressed() { noiseSpeed = random(0.001, 0.008); scl = random(15, 30); cols = floor(w / scl) + 1; rows = floor(h / scl) + 1; } </script> </body> </html>
thinking
Perfect! The file is complete and contains all the necessary components: 1. Full-screen CSS setup with overflow hidden and fixed positioning for the canvas 2. The p5.min.js script loaded locally (as requested) 3. 3000 particles with varying speeds, sizes, and trail lengths 4. Perlin noise-based flow field that evolves over time (3D noise with noiseZ) 5. Fading trails using HSB color mode with alpha transparency 6. Color shifting using a global hueOffset that continuously increments 7. Window resize handling 8. Interactive mouse press to randomize noise speed and flow field scale This should meet all the requirements. Let me just confirm the file exists properly.
{"command":"ls -la /tmp/ws/"}total 1020 drwxr-sr-x. 2 node node 41 Aug 13 01:29 . drwxrwsrwx. 3 root node 16 Aug 13 01:29 .. -rw-r--r--. 1 node node 5726 Aug 13 01:29 index.html -rw-r--r--. 1 node node 1034532 Aug 13 01:29 p5.min.js
thinking
Great! Both files are present in the /tmp/ws directory: 1. index.html (5726 bytes) - The flow field particle animation 2. p5.min.js (1034532 bytes) - The p5.js library The index.html file includes: - A full-screen canvas setup - 3000 particles with trails - Perlin noise-based flow field that evolves over time - Color shifting with HSB color mode - Fading trails using semi-transparent backgrounds - Window resize handling - Interactive element (clicking randomizes flow field parameters) Everything looks complete and correct. The animation should work as requested.
The flow field particle animation has been created successfully. Here's what's in `/tmp/ws/index.html`: **Features:** - **3000 particles** with varying speeds, sizes, and trail lengths - **Perlin noise-based flow field** that evolves over time using 3D noise - **Fading trails** created with semi-transparent background overlay and trail history - **Color shifting** using HSB color mode with continuously changing hues - **Full-screen responsive design** that adapts to window resizing - **Interactive**: Click anywhere to randomize the flow field scale and animation speed **Implementation details:** - Uses p5.js global mode - Particles follow a vector field calculated from Perlin noise - Each particle maintains its own trail history with alpha fading - Colors shift globally and individually per particle - Noise field evolves smoothly over time To run, simply open `index.html` in a web browser. The animation will start immediately and run continuously.
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 trails with colorful shifting hues animate continuously, forming river-like streams; input has little visible effect.
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.