Flow-field particles · muse-glimmer-30b
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
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. We need single self-contained file named index.html in current directory: CSS in <style>, JS in <script>, inline — do not create separate .css/.js files. Use NO external resources, CDNs or network requests: artifact runs fully sandboxed with no network. End with index.html present. These library file(s) are ALREADY present in current directory — load each with plain <script src="NAME"></script> using its exact filename (never a CDN or URL), then build on top of it: p5.min.js. Current working directory /tmp/ws Check if p5.min.js exists.
{"command":"ls -la /tmp/ws"}total 1012 drwxr-sr-x. 2 node node 23 Aug 13 01:29 . drwxrwsrwx. 3 root node 16 Aug 13 01:29 .. -rw-r--r--. 1 node node 1034532 Aug 13 01:29 p5.min.js
thinking
Good. Need to create index.html with full-screen flow-field particle animation.
Requirements: thousands of particles advected by Perlin-noise vectors, leaving fading trails, colors shifting over time.
Use p5.min.js loaded via <script src="p5.min.js"></script>
Full-screen canvas. Use p5 sketch in global mode or instance.
Implement flow field: noise scale maybe 0.001-0.003. For each particle, get angle = noise(x*scale, y*scale, zoff) * TWO_PI * 4? Actually typical: angle = noise * TWO_PI.
Particles advected: velocity set by flow field vector. Or position += vector.
Fading trails: use background with alpha overlay, or draw semi-transparent rect each frame.
Colors shifting over time: use HSB color mode, hue based on time or particle age.
Thousands of particles: maybe 2000-5000. Could be 3000.
Optimization: don't calculate per particle noise? Could precompute grid? But thousands fine.
Use p5 setup: createCanvas(windowWidth, windowHeight). colorMode(HSB,360,100,100,100). background.
In draw: fill background with alpha 0.05 to create trails.
For each particle: update position based on flow field: let angle = noise(p.x * 0.001, p.y * 0.001, time) * TWO_PI *2 . Then vx = cos(angle)*speed, vy = sin(angle)*speed. Or use p5.Vector.
Wrap around edges.
Draw particle as small ellipse or point with color.
Color shifting over time: hue = (frameCount + p.offset) %360.
Performance: thousands particles drawing each frame.
Could also use p5's noise with time offset.
Make full-screen, no scrollbars: CSS body margin0 overflow hidden.
Implement resize: windowResized -> resizeCanvas.
Implement particle class with x,y, hue offset.
Initialize particles randomly.
Better performance: use p5.createGraphics for trails? Simpler use background(alpha).
Let's write index.html.
Structure:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Flow Field</title>
<style>html,body{margin:0;padding:0;overflow:hidden;background:#000}canvas{display:block}</style>
<script src="p5.min.js"></script>
</head>
<body>
<script>
...
</script>
</body>
</html>
Implement sketch.
Global mode:
let particles = [];
let numParticles = 3000;
let scl = 0.0015;
let zoff = 0;
function setup() { createCanvas(windowWidth,windowHeight); colorMode(HSB,360,100,100,100,100); for... }
function draw() { background(0,0,0,5) ?? Wait with alpha? In HSB, background with alpha? Use fill with alpha overlay: Actually background with alpha works but resets? In p5, background with alpha will fade. Simpler: fill(0,0,0,10); rect(0,0,width,height); That creates trails.
Let's do:
background(0); then draw semi-transparent rect each frame? No.
Better: background(0,0,0,20) each frame creates fade.
But p5 background clears each frame. Using alpha will fade.
Let's do: background(0,0,0,15) // HSB black with alpha 15
Then update particles.
zoff increment.
Draw flow field optionally as lines? Could skip for performance.
Particles: update position using noise.
Implementation details:
class Particle {
constructor(){ this.x= random(width); this.y= random(height); this.hue = random(360); this.speed=2; }
update(){
let angle = noise(this.x * scl, this.y * scl, zoff) * TWO_PI * 2;
this.x += cos(angle) * this.speed;
this.y += sin(angle) * this.speed;
// wrap
if(this.x<0) this.x+=width;
if(this.x>width) this.x-=width;
if(this.y<0) this.y+=height;
if(this.y>height) this.y-=height;
}
show(){
let hue = (this.hue + frameCount*0.2) %360;
stroke(hue, 80, 100, 80);
strokeWeight(2);
point(this.x, this.y);
}
}
But point may be slow? Okay.
Could use 5000 particles: 3000 okay.
Could also add trail per particle via previous positions? The fading background gives trails.
Improve colors shifting over time: hue shift based on position + time.
Let's implement.
Potential improvements: use p5's noiseSeed.
Also ensure full-screen: CSS.
Let's write file.
Use write tool./tmp/ws/index.html (2033 bytes)Successfully wrote 2033 bytes to /tmp/ws/index.html
thinking
File created. Verify it exists.
{"path":"/tmp/ws/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 Particles</title> <style> html, body { margin: 0; padding: 0; overflow: hidden; background: #000; } canvas { display: block; } </style> <script src="p5.min.js"></script> </head> <body> <script> let particles = []; let numParticles = 4000; let scl = 0.0012; let zoff = 0; let timeOffset = 0; function setup() { createCanvas(windowWidth, windowHeight); colorMode(HSB, 360, 100, 100, 100); noFill(); for (let i = 0; i < numParticles; i++) { particles.push(new Particle()); } } function draw() { // Fading trails background(0, 0, 0, 12); // Slightly evolve flow field over time zoff += 0.0008; timeOffset += 0.01; for (let p of particles) { p.update(); p.show(); } } function windowResized() { resizeCanvas(windowWidth, windowHeight); } class Particle { constructor() { this.x = random(width); this.y = random(height); this.baseHue = random(180, 300); this.speed = random(1.5, 3.0); this.size = random(1.5, 2.5); } update() { // Perlin noise flow field let n = noise(this.x * scl, this.y * scl, zoff); let angle = n * TWO_PI * 2.5; // Add subtle time modulation let mod = sin(timeOffset + this.x * 0.001) * 0.1; angle += mod; this.x += cos(angle) * this.speed; this.y += sin(angle) * this.speed; // Wrap around edges if (this.x < -10) this.x = width + 10; if (this.x > width + 10) this.x = -10; if (this.y < -10) this.y = height + 10; if (this.y > height + 10) this.y = -10; } show() { // Color shifts over time let hue = (this.baseHue + frameCount * 0.3) % 360; let sat = 70 + 30 * sin(frameCount * 0.01 + this.x * 0.01); let bri = 80 + 20 * cos(frameCount * 0.008 + this.y * 0.01); stroke(hue, sat, bri, 85); strokeWeight(this.size); point(this.x, this.y); } } </script> </body> </html>
thinking
File created successfully. Could also test quickly? Not needed. Make sure meets requirements: single file index.html, CSS in style tag, JS in script tag, inline, no external resources except p5.min.js loaded via <script src="p5.min.js"></script>. That's allowed. No CDN. Full-screen flow-field particle animation: thousands particles advected by Perlin-noise vectors, leaving fading trails, colors shifting over time. Yes. Potentially improve performance: 4000 particles good. Return answer.
Created a self-contained full-screen flow-field animation. The file loads the local `p5.min.js` and runs in global mode with ~4,000 particles advected by 3D Perlin noise, fading trails via an alpha background, and HSB colors that shift over time. `/tmp/ws/index.html` is now present and ready: ```html <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> ... <script src="p5.min.js"></script> ... </head> <body> <script>/* flow field sketch */</script> </body> </html> ``` Open `index.html` to see the full-screen particle flow field with trails and color cycling.
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 animate continuously with shifting colors; drag/wheel fade the canvas nearly to black, arrows/wasd create odd feather shapes.
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.