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hyperframes/docs/catalog/blocks/code-particle-assemble.mdx
T
Miguel Ángel 9734578e60 feat(registry): bring back the video-primitive moves (#3169) 
Restores the 208 catalog items reverted after their previews 404'd in
production, this time on the payload mechanism rather than the .html files
that caused the outage.

The generator no longer writes a preview document to docs/public. That writer,
and the machinery under it, existed only to produce files the docs host
discards, so it is gone rather than bypassed. Items now embed the composition
itself via a payload, which is what the previous change already does for the
items that were already in the catalog.

The variables explorer is parked, not restored: it drove its preview through
the same unpublished .html path, so it would have shown an empty frame. Items
that declare variables get the live player plus the static variables table, and
reconnecting the explorer to payloads is a follow-up.
2026-08-10 18:46:03 -04:00

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---
title: "Code Particle Assemble"
description: "Thousands of GPU points scatter through space and fly to the exact glyph pixels of the code, resolving into readable syntax-highlighted text — a particle system, not a token tween."
---
import { InstallCommand } from "/snippets/install-command.jsx";
<iframe
className="w-full aspect-video rounded-xl border-0 bg-zinc-100 dark:bg-zinc-800"
title="code-particle-assemble preview"
loading="lazy"
srcDoc={`<!doctype html><html><head><meta charset="utf-8"><style>html,body{margin:0;height:100%;overflow:hidden;background:transparent}hyperframes-player{display:block;width:100%;height:100%}</style><script src="https://cdn.jsdelivr.net/npm/@hyperframes/player@0.7/dist/hyperframes-player.global.js"><\/script></head><body><script>fetch("/public/catalog/blocks/code-particle-assemble.json").then(function(r){return r.json()}).then(function(d){var p=document.createElement("hyperframes-player");p.setAttribute("srcdoc",d.html);p.setAttribute("controls","");p.setAttribute("autoplay","");p.setAttribute("loop","");p.setAttribute("muted","");p.setAttribute("poster","https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/code-particle-assemble.png");document.body.appendChild(p)});<\/script></body></html>`}
/>
## Install
<InstallCommand command="npx hyperframes add code-particle-assemble" />
That writes one file: `compositions/code-particle-assemble.html`.
## Source
<Accordion title={`code-particle-assemble.html`}>
```html
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=1920, height=1080" />
<title>Code Particle Assemble</title>
<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/three@0.147.0/build/three.min.js"></script>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
html,
body {
width: 1920px;
height: 1080px;
overflow: hidden;
background: #05070b;
}
#root {
position: relative;
width: 1920px;
height: 1080px;
}
#gl {
position: absolute;
inset: 0;
width: 1920px;
height: 1080px;
display: block;
}
</style>
</head>
<body>
<div
id="root"
data-composition-id="code-particle-assemble"
data-start="0"
data-duration="8"
data-width="1920"
data-height="1080"
>
<canvas id="gl" width="1920" height="1080"></canvas>
</div>
<script>
window.__TOKENS = {
assemble: {
lang: "js",
theme: "github-dark",
bg: "#24292e",
fg: "#e1e4e8",
states: [
{
code: "const app = pipe(\n parse,\n optimize,\n emit,\n)",
tokens: [
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-0",
content: "const",
color: "#F97583",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-1",
content: " ",
color: "#E1E4E8",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-2",
content: "app",
color: "#79B8FF",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-3",
content: " ",
color: "#E1E4E8",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-4",
content: "=",
color: "#F97583",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-5",
content: " ",
color: "#E1E4E8",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-6",
content: "pipe",
color: "#B392F0",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-7",
content: "(",
color: "#E1E4E8",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-8",
content: "\n",
color: "#e1e4e8",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-9",
content: " ",
color: "#e1e4e8",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-10",
content: "parse,",
color: "#E1E4E8",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-11",
content: "\n",
color: "#e1e4e8",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-12",
content: " ",
color: "#e1e4e8",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-13",
content: "optimize,",
color: "#E1E4E8",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-14",
content: "\n",
color: "#e1e4e8",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-15",
content: " ",
color: "#e1e4e8",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-16",
content: "emit,",
color: "#E1E4E8",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-17",
content: "\n",
color: "#e1e4e8",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-18",
content: ")",
color: "#E1E4E8",
fontStyle: 0,
},
{
key: "AFffx9qQBGKnMZ-vDjoaRwC68xQloGJNUSICY1myCK4-19",
content: "\n",
color: "#e1e4e8",
fontStyle: 0,
},
],
},
],
},
};
window.__BLOCK = {
id: "code-particle-assemble",
effect: "particles",
seq: "assemble",
duration: 8,
seed: 23,
};
</script>
<script>
// hf-code-anim-gl.js — WebGL code-animation engine for the "crazy" Code Animations blocks.
//
// Bridges the baked Shiki tokens (window.__TOKENS) into Three.js: the tokens are drawn once
// to an offscreen 2D canvas (a CanvasTexture), which then drives a lit 3D slab, a dissolve
// shader, or a GPU particle system. Determinism per the project contract:
// - render only via tl.eventCallback("onUpdate", …) + one initial render() — never rAF
// - all randomness from a seeded mulberry32 — never Math.random / Date.now
// - canvas drawn once after document.fonts.ready (final glyph metrics)
// - paused GSAP timeline registered on window.__timelines[id]; HF seeks it per frame
//
// Each block sets window.__BLOCK = { id, effect, seq, duration, seed } and includes this engine.
(function () {
"use strict";
var T = window.__TOKENS || {};
// ---- seeded PRNG (no Math.random) -----------------------------------------
function mulberry32(a) {
return function () {
a |= 0;
a = (a + 0x6d2b79f5) | 0;
var t = Math.imul(a ^ (a >>> 15), 1 | a);
t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t;
return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
};
}
// ---- split a token state into lines of {content,color} --------------------
function splitLines(state) {
var lines = [[]];
for (var i = 0; i < state.tokens.length; i++) {
var t = state.tokens[i];
if (t.content === "\n") {
lines.push([]);
continue;
}
lines[lines.length - 1].push(t);
}
while (lines.length && lines[lines.length - 1].length === 0) lines.pop();
return lines;
}
// ---- THE BRIDGE: draw baked tokens to an offscreen 2D canvas ---------------
// Returns { canvas, W, H, lines, lineH, padY, fontPx } so effects can sample it.
function drawCodeToCanvas(state, opts) {
opts = opts || {};
var fontPx = opts.fontPx || 36;
var lineH = opts.lineH || 54;
var padX = opts.padX || 70;
var padY = opts.padY || 60;
var weight = opts.weight || 500;
var font = weight + " " + fontPx + 'px "JetBrains Mono", monospace';
var lines = splitLines(state);
var measure = document.createElement("canvas").getContext("2d");
measure.font = font;
var maxW = 0;
for (var i = 0; i < lines.length; i++) {
var w = 0;
for (var j = 0; j < lines[i].length; j++)
w += measure.measureText(lines[i][j].content).width;
if (w > maxW) maxW = w;
}
var W = Math.max(2, Math.ceil(maxW + padX * 2));
var H = Math.max(2, Math.ceil(lines.length * lineH + padY * 2));
var canvas = document.createElement("canvas");
canvas.width = W;
canvas.height = H;
var ctx = canvas.getContext("2d");
if (opts.transparent) {
ctx.clearRect(0, 0, W, H);
} else {
ctx.fillStyle = opts.bg || "#0b0f17";
ctx.fillRect(0, 0, W, H);
}
ctx.textBaseline = "top";
ctx.font = font;
for (var li = 0; li < lines.length; li++) {
var x = padX;
var y = padY + li * lineH;
for (var k = 0; k < lines[li].length; k++) {
var tok = lines[li][k];
ctx.fillStyle = tok.color;
ctx.fillText(tok.content, x, y);
x += ctx.measureText(tok.content).width;
}
}
return {
canvas: canvas,
W: W,
H: H,
lines: lines.length,
lineH: lineH,
padY: padY,
fontPx: fontPx,
};
}
function fxParticles(THREE, scene, camera, renderer, state, st, tl, dur, seed) {
scene.background = new THREE.Color(0x05070b);
var code = drawCodeToCanvas(state, {
fontPx: 46,
lineH: 70,
padX: 70,
padY: 64,
weight: 700,
});
var cw = code.W;
var ch = code.H;
var data = code.canvas.getContext("2d").getImageData(0, 0, cw, ch).data;
var rng = mulberry32(((seed || 1) * 2654435761) >>> 0);
var worldW = 13.0;
var worldH = worldW * (ch / cw);
// sample glyph pixels (brighter than the dark bg) on a fixed grid
var step = 2;
var tx = [];
var col = [];
for (var y = 0; y < ch; y += step) {
for (var x = 0; x < cw; x += step) {
var idx = (y * cw + x) * 4;
var r = data[idx];
var g = data[idx + 1];
var b = data[idx + 2];
if (r + g + b < 120) continue; // skip background
tx.push((x / cw - 0.5) * worldW, -(y / ch - 0.5) * worldH, 0);
col.push(r / 255, g / 255, b / 255);
}
}
var n = tx.length / 3;
var positions = new Float32Array(n * 3);
var aOrigin = new Float32Array(n * 3);
var aTarget = new Float32Array(tx);
var aColor = new Float32Array(col);
var aDelay = new Float32Array(n);
for (var i = 0; i < n; i++) {
var sx = (rng() * 2 - 1) * worldW * 1.15;
var sy = (rng() * 2 - 1) * worldH * 1.7;
var sz = (rng() * 2 - 1) * 9.0 - 2.0;
aOrigin[i * 3] = sx;
aOrigin[i * 3 + 1] = sy;
aOrigin[i * 3 + 2] = sz;
positions[i * 3] = sx;
positions[i * 3 + 1] = sy;
positions[i * 3 + 2] = sz;
aDelay[i] = rng();
}
var geo = new THREE.BufferGeometry();
geo.setAttribute("position", new THREE.BufferAttribute(positions, 3));
geo.setAttribute("aOrigin", new THREE.BufferAttribute(aOrigin, 3));
geo.setAttribute("aTarget", new THREE.BufferAttribute(aTarget, 3));
geo.setAttribute("aColor", new THREE.BufferAttribute(aColor, 3));
geo.setAttribute("aDelay", new THREE.BufferAttribute(aDelay, 1));
var uniforms = { uProgress: { value: 0 }, uSize: { value: 3.4 } };
var mat = new THREE.ShaderMaterial({
uniforms: uniforms,
transparent: true,
depthTest: false,
depthWrite: false,
blending: THREE.NormalBlending,
vertexShader: [
"attribute vec3 aOrigin; attribute vec3 aTarget; attribute vec3 aColor; attribute float aDelay;",
"uniform float uProgress; uniform float uSize;",
"varying vec3 vColor; varying float vP;",
"void main(){",
" float span = 0.62;",
" float p = clamp((uProgress - aDelay*(1.0-span)) / span, 0.0, 1.0);",
" p = p*p*(3.0-2.0*p);",
" vec3 pos = mix(aOrigin, aTarget, p);",
" vec4 mv = modelViewMatrix * vec4(pos, 1.0);",
" gl_Position = projectionMatrix * mv;",
" gl_PointSize = uSize * (60.0 / -mv.z) * (0.45 + 0.55*p);",
" vColor = aColor; vP = p;",
"}",
].join("\n"),
fragmentShader: [
"precision highp float;",
"varying vec3 vColor; varying float vP;",
"void main(){",
" vec2 d = gl_PointCoord - 0.5;",
" float r2 = dot(d, d);",
" if (r2 > 0.25) discard;",
" float a = smoothstep(0.25, 0.02, r2);",
// brighter & whiter in flight, resolves to true color as it lands
" vec3 c = mix(vColor + vec3(0.32)*(1.0-vP), vColor, vP);",
" gl_FragColor = vec4(c, a * (0.7 + 0.3*vP));",
"}",
].join("\n"),
});
var pts = new THREE.Points(geo, mat);
scene.add(pts);
camera.position.set(0, 0, 10);
var vfov = (camera.fov * Math.PI) / 180;
var sa = 1920 / 1080;
var fitH = worldH / 2 / Math.tan(vfov / 2) / 0.78;
var fitW = worldW / 2 / (Math.tan(vfov / 2) * sa) / 0.78;
camera.position.z = Math.max(fitH, fitW);
camera.lookAt(0, 0, 0);
tl.to(uniforms.uProgress, { value: 1.0, duration: dur * 0.72, ease: "power2.out" }, 0);
// uProgress is tweened by GSAP; the boot loop's render() draws once per frame.
return function () {};
}
// ---- dispatch + boot ------------------------------------------------------
function buildEffect(THREE, scene, camera, renderer, spec, st, tl) {
var state = T[spec.seq].states[0];
var dur = spec.duration;
if (spec.effect === "particles")
return fxParticles(THREE, scene, camera, renderer, state, st, tl, dur, spec.seed);
return function () {};
}
// Free GPU resources (renderer, geometries, materials, textures) on page teardown.
// One-shot renders exit per job so nothing leaks there; this guards long-lived
// Studio/player sessions that reload. Fires only on unload — never during capture.
function disposeGL(renderer, scene) {
scene.traverse(function (o) {
if (o.geometry && o.geometry.dispose) o.geometry.dispose();
var mats = o.material ? (Array.isArray(o.material) ? o.material : [o.material]) : [];
mats.forEach(function (m) {
if (m.map && m.map.dispose) m.map.dispose();
if (
m.uniforms &&
m.uniforms.uTex &&
m.uniforms.uTex.value &&
m.uniforms.uTex.value.dispose
) {
m.uniforms.uTex.value.dispose();
}
if (m.dispose) m.dispose();
});
});
if (renderer.dispose) renderer.dispose();
}
function go() {
var spec = window.__BLOCK;
var root = document.getElementById("root");
var glcanvas = document.getElementById("gl");
var W = 1920;
var H = 1080;
window.__timelines = window.__timelines || {};
var tl = gsap.timeline({ paused: true });
window.__timelines[spec.id] = tl; // register synchronously
var THREE = window.THREE;
var renderer = new THREE.WebGLRenderer({
canvas: glcanvas,
antialias: true,
alpha: false,
preserveDrawingBuffer: true,
});
renderer.setPixelRatio(1);
renderer.setSize(W, H, false);
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(45, W / H, 0.1, 200);
var st = {};
document.fonts.ready.then(function () {
var renderFn = buildEffect(THREE, scene, camera, renderer, spec, st, tl);
function render() {
renderFn();
renderer.render(scene, camera);
}
tl.eventCallback("onUpdate", render);
var dur = parseFloat(root.dataset.duration) || tl.duration();
tl.to({}, { duration: dur }, 0); // pad to full composition length
render(); // paint frame 0
window.addEventListener("beforeunload", function () {
disposeGL(renderer, scene);
});
});
}
if (document.readyState === "loading") document.addEventListener("DOMContentLoaded", go);
else go();
})();
</script>
</body>
</html>
```
</Accordion>
## Usage
After installing, add the block to your host composition:
```html
<div data-composition-id="code-particle-assemble" data-composition-src="compositions/code-particle-assemble.html" data-start="0" data-duration="8" data-track-index="1" data-width="1920" data-height="1080"></div>
```
{/* hf:generated-footer */}
Tagged `code` `code-animation` `particles` `gpu` `webgl` `developer`.
## Related topics
- [Browse the complete Catalog](/catalog)
- [Add assets and Catalog items in Studio](/studio/assets-and-blocks)
- [Build a richer composition](/go-further)
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