Install
That writes one file:compositions/components/caption-particle-burst.html.
Source
caption-particle-burst.html
caption-particle-burst.html
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=1920, height=1080" />
<title>Particle Burst</title>
<link rel="preconnect" href="https://fonts.googleapis.com" />
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
<link
href="https://fonts.googleapis.com/css2?family=Outfit:wght@900&display=swap"
rel="stylesheet"
/>
<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
<style>
*,
*::before,
*::after {
box-sizing: border-box;
}
html,
body {
width: 1920px;
height: 1080px;
margin: 0;
overflow: hidden;
background: transparent;
}
#particle-burst {
pointer-events: none;
position: relative;
width: 1920px;
height: 1080px;
overflow: hidden;
background: transparent;
}
.bs-overlay {
position: absolute;
inset: 0;
background: transparent;
z-index: 1;
pointer-events: none;
}
#bs-container {
position: absolute;
inset: 0;
z-index: 10;
pointer-events: none;
}
.bs-group {
position: absolute;
bottom: 120px;
left: 0;
width: 100%;
display: flex;
flex-wrap: wrap;
align-items: flex-end;
justify-content: center;
gap: 24px;
padding: 0 100px;
opacity: 0;
visibility: hidden;
}
.bs-word {
font-family: "Outfit", sans-serif;
font-weight: 900;
font-size: 88px;
text-transform: uppercase;
color: rgba(255, 255, 255, 0.45);
display: inline-block;
letter-spacing: 0.05em;
line-height: 1;
}
.bs-particle {
position: absolute;
width: 10px;
height: 10px;
border-radius: 50%;
opacity: 0;
pointer-events: none;
z-index: 20;
left: 960px;
bottom: 180px;
}
</style>
</head>
<body>
<div
id="particle-burst"
data-composition-id="caption-particle-burst"
data-timeline-locked
data-start="0"
data-duration="8"
data-fps="30"
data-width="1920"
data-height="1080"
>
<div class="bs-overlay"></div>
<div id="bs-container"></div>
</div>
<script>
(function () {
window.__timelines = window.__timelines || {};
var _fitCanvas = document.createElement("canvas");
var _fitCtx = _fitCanvas.getContext("2d");
function fitFontSize(text, baseFontSize, fontWeight, fontFamily, maxWidth) {
var size = baseFontSize;
var minSize = Math.floor(baseFontSize * 0.45);
while (size > minSize) {
_fitCtx.font = fontWeight + " " + size + "px " + fontFamily;
if (_fitCtx.measureText(text).width <= maxWidth) return size;
size -= 2;
}
return minSize;
}
function mulberry32(seed) {
return function () {
seed |= 0;
seed = (seed + 0x6d2b79f5) | 0;
var t = Math.imul(seed ^ (seed >>> 15), 1 | seed);
t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t;
return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
};
}
var WORDS = [
{ text: "Every", start: 0.0, end: 0.3 },
{ text: "great", start: 0.3, end: 0.55 },
{ text: "video", start: 0.55, end: 0.85 },
{ text: "starts", start: 0.85, end: 1.1 },
{ text: "with", start: 1.1, end: 1.25 },
{ text: "a", start: 1.25, end: 1.35 },
{ text: "single", start: 1.35, end: 1.65 },
{ text: "frame.", start: 1.65, end: 2.0 },
{ text: "HyperFrames", start: 2.1, end: 2.65 },
{ text: "lets", start: 2.65, end: 2.85 },
{ text: "you", start: 2.85, end: 2.95 },
{ text: "write", start: 2.95, end: 3.15 },
{ text: "HTML", start: 3.15, end: 3.55 },
{ text: "and", start: 3.55, end: 3.65 },
{ text: "render", start: 3.65, end: 3.95 },
{ text: "professional", start: 3.95, end: 4.45 },
{ text: "video.", start: 4.45, end: 4.8 },
{ text: "No", start: 4.9, end: 5.05 },
{ text: "timeline.", start: 5.05, end: 5.45 },
{ text: "No", start: 5.5, end: 5.65 },
{ text: "drag", start: 5.65, end: 5.85 },
{ text: "and", start: 5.85, end: 5.95 },
{ text: "drop.", start: 5.95, end: 6.25 },
{ text: "Just", start: 6.35, end: 6.55 },
{ text: "code", start: 6.55, end: 6.8 },
{ text: "that", start: 6.8, end: 6.95 },
{ text: "becomes", start: 6.95, end: 7.3 },
{ text: "cinema.", start: 7.3, end: 7.7 },
];
// Keywords get particle burst + gold color
var KEYWORDS = new Set([8, 12, 15, 24, 27]); // HyperFrames, HTML, professional, code, cinema.
var RAW_GROUPS = [
[0, 3],
[4, 7],
[8, 8],
[9, 12],
[13, 15],
[16, 16],
[17, 19],
[20, 22],
[23, 24],
[25, 27],
];
var GROUPS = RAW_GROUPS.map(function (pair, gi) {
var ws = pair[0],
we = pair[1];
var nextStart = gi + 1 < RAW_GROUPS.length ? WORDS[RAW_GROUPS[gi + 1][0]].start : 8.0;
var gEnd = Math.min(WORDS[we].end + 0.35, nextStart - 0.05);
return { wordStart: ws, wordEnd: we, start: WORDS[ws].start, end: gEnd };
});
var PARTICLE_COLORS = [
"#FFD700",
"#FF6B35",
"#FF3C78",
"#9B5DE5",
"#00BBF9",
"#00F5D4",
"#ffffff",
"#F15BB5",
];
var NUM_PARTICLES = 10;
var container = document.getElementById("bs-container");
var tl = gsap.timeline({ paused: true });
GROUPS.forEach(function (g, gi) {
var groupWords = WORDS.slice(g.wordStart, g.wordEnd + 1);
var groupText = groupWords
.map(function (w) {
return w.text.toUpperCase();
})
.join(" ");
var fontSize = fitFontSize(groupText, 88, "900", "'Outfit', sans-serif", 1720);
var grp = document.createElement("div");
grp.className = "bs-group";
grp.id = "bs-grp-" + gi;
groupWords.forEach(function (w, i) {
var wi = g.wordStart + i;
var span = document.createElement("span");
span.className = "bs-word";
span.id = "bs-w-" + wi;
span.textContent = w.text.toUpperCase();
span.style.fontSize = fontSize + "px";
grp.appendChild(span);
});
container.appendChild(grp);
});
// Create particles for keyword words
var particleData = {};
WORDS.forEach(function (w, wi) {
if (!KEYWORDS.has(wi)) return;
var rng = mulberry32(wi * 137 + 99);
particleData[wi] = [];
for (var p = 0; p < NUM_PARTICLES; p++) {
var angle = (p / NUM_PARTICLES) * Math.PI * 2 + rng() * 0.6;
var dist = 120 + rng() * 200;
var sz = 4 + rng() * 8;
var dx = Math.cos(angle) * dist;
var dy = -Math.sin(angle) * dist;
var dot = document.createElement("div");
dot.className = "bs-particle";
dot.id = "bs-p-" + wi + "-" + p;
dot.style.backgroundColor = PARTICLE_COLORS[p % PARTICLE_COLORS.length];
dot.style.width = sz.toFixed(1) + "px";
dot.style.height = sz.toFixed(1) + "px";
container.appendChild(dot);
particleData[wi].push({ el: dot, dx: dx, dy: dy });
}
});
GROUPS.forEach(function (g, gi) {
var grp = document.getElementById("bs-grp-" + gi);
var groupWords = WORDS.slice(g.wordStart, g.wordEnd + 1);
tl.set(grp, { visibility: "visible" }, g.start);
tl.fromTo(
grp,
{ opacity: 0, scale: 0.92 },
{ opacity: 1, scale: 1, duration: 0.2, ease: "back.out(1.5)" },
g.start,
);
groupWords.forEach(function (w, i) {
var wi = g.wordStart + i;
var wordEl = document.getElementById("bs-w-" + wi);
var isKW = KEYWORDS.has(wi);
tl.to(
wordEl,
{ color: isKW ? "#FFD700" : "#ffffff", scale: isKW ? 1.12 : 1.05, duration: 0.08 },
w.start,
);
tl.to(wordEl, { color: "rgba(255,255,255,0.4)", scale: 1.0, duration: 0.1 }, w.end);
if (isKW && particleData[wi]) {
particleData[wi].forEach(function (pd, pi) {
tl.set(pd.el, { x: 0, y: 0, opacity: 0 }, w.start);
tl.to(
pd.el,
{ x: pd.dx, y: pd.dy, opacity: 1, duration: 0.12, ease: "power3.out" },
w.start + pi * 0.018,
);
tl.to(
pd.el,
{ opacity: 0, duration: 0.45, ease: "power1.in" },
w.start + 0.12 + pi * 0.018,
);
tl.set(pd.el, { opacity: 0, x: 0, y: 0 }, w.start + 0.7);
});
}
});
tl.to(grp, { opacity: 0, duration: 0.14, ease: "power2.in" }, g.end - 0.14);
tl.set(grp, { opacity: 0, visibility: "hidden" }, g.end);
});
tl.seek(0);
window.__timelines["caption-particle-burst"] = tl;
})();
</script>
</body>
</html>
Usage
Opencompositions/components/caption-particle-burst.html and paste its contents into your composition. See the comment header in the file for detailed instructions.
Tagged captions caption-style particles burst effects.