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chore: import upstream snapshot with attribution
2026-07-13 12:58:35 +08:00

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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=1920, height=1080" />
<title>Scene 3 — Assembly Focus Reveal (hyperframes)</title>
<!--
HyperFrames composition.tsx.
Choreography (5 phases, 5 seconds total):
0.00 – 0.67s "Just use" assembles in a discrete sequence (with hold)
0.73 – 1.23s Pink logo pops in with back.out elastic
1.50 – 2.20s "Just use" slides left + fades; container recenters around brand
2.67 – 3.57s Camera zooms 5.5× into the logo (scale + counter-translate)
3.67 – 5.00s Logo breathes (sine onUpdate, multiplicative on pop scale)
Key differences :
- Single paused GSAP timeline registered to window.__timelines["main"]
- brandTextWidth measured via getBoundingClientRect after document.fonts.ready
- HERO_FINAL_OFFSET_X derived from real measurement, not estimate
- Breathing uses the onUpdate (multiplicative) form so it multiplies
onto the pop scale, not a fromTo + yoyo which would overwrite the pop value
- Three nested transform layers: zoom-scale → zoom-translate → recenter-shift
- Logo is loaded from a static PNG asset
-->
<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
<style>
:root {
--bg: #000000;
--text-white: #ffffff;
--pink: #e91e63;
}
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
html,
body {
margin: 0;
width: 1920px;
height: 1080px;
overflow: hidden;
background: var(--bg);
font-family: "Google Sans", "Roboto", Inter, system-ui, sans-serif;
color: var(--text-white);
}
.stage {
position: absolute;
inset: 0;
display: flex;
align-items: center;
justify-content: center;
overflow: hidden;
}
/* Three nested transform layers (outer → inner) */
.zoom-scale {
transform-origin: center center;
will-change: transform;
display: flex;
align-items: center;
justify-content: center;
}
.zoom-translate {
will-change: transform;
display: flex;
align-items: center;
justify-content: center;
}
.recenter-shift {
display: flex;
align-items: center;
}
/* Companion text — fixed width to prevent assembly jitter */
.companion {
width: 600px;
display: flex;
justify-content: flex-end;
margin-right: 30px;
white-space: nowrap;
color: var(--text-white);
font-size: 140px;
font-weight: 400;
line-height: 1;
}
/* Brand group: text + hero icon */
.brand-group {
display: flex;
align-items: center;
gap: 20px;
}
.brand-text {
color: var(--text-white);
font-size: 140px;
font-weight: 700;
white-space: nowrap;
line-height: 1;
}
.hero {
display: flex;
align-items: center;
justify-content: center;
width: 140px;
height: 140px;
/* initial scale(0) set by GSAP fromTo */
}
.hero .logo-mark {
width: 100%;
height: 100%;
display: block;
}
/* Hidden probe used for text measurement */
.measure-probe {
position: absolute;
left: -99999px;
top: -99999px;
visibility: hidden;
white-space: pre;
}
</style>
</head>
<body>
<div
id="root"
data-composition-id="main"
data-start="0"
data-duration="5"
data-width="1920"
data-height="1080"
>
<div
class="stage clip"
data-start="0"
data-duration="5"
data-track-index="1"
id="brand-stage"
>
<div class="zoom-scale" data-layout-allow-overflow>
<div class="zoom-translate">
<div class="recenter-shift">
<div class="companion">
<span class="companion-text">J</span>
</div>
<div class="brand-group" data-layout-allow-overflow>
<span class="brand-text">Hyperframes</span>
<div class="hero">
<!-- Inline-SVG placeholder mark — swap for your logo image -->
<svg
class="logo-mark"
viewBox="0 0 100 100"
role="img"
aria-label="hyperframes logo"
>
<defs>
<linearGradient id="hfMark" x1="0" y1="0" x2="1" y2="1">
<stop offset="0" stop-color="#8b7bff" />
<stop offset="1" stop-color="#3ddc97" />
</linearGradient>
</defs>
<rect x="4" y="4" width="92" height="92" rx="22" fill="url(#hfMark)" />
<text
x="50"
y="63"
text-anchor="middle"
font-family="Inter, system-ui, sans-serif"
font-size="40"
font-weight="800"
fill="#fff"
>
HF
</text>
</svg>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<script>
/* ================================================================
CONSTANTS — composition dimensions baked in.
================================================================ */
const W = 1920,
H = 1080;
const TOTAL_DURATION = 5.0;
const COMPANION_WIDTH = 600;
const COMPANION_GAP = 30; // margin-right on .companion
const BRAND_FONT_SIZE = 140;
const HERO_GAP = 20;
const HERO_SIZE = 140;
const TIMING = {
// Phase 1: companion assembly
textStart: 0.0,
textEnd: 0.67,
// Phase 2: hero pop
popStart: 0.73,
popDur: 0.5,
// Phase 3: slide-out + recenter
slideStart: 1.5,
slideDur: 0.7,
// Phase 4: zoom
zoomStart: 2.67,
zoomDur: 0.9,
// Phase 5: breathing
breathStart: 3.67,
};
const FINAL_RECENTER_OFFSET = -180; // pre-calculated, tuned for visual feel
/* ================================================================
DISCRETE TEXT SEQUENCE for the companion assembly.
Converted from the source frame-based sequence to seconds at 30fps.
================================================================ */
const SEQUENCE = [
{ t: 0.0, text: "J" },
{ t: 0.07, text: "Jus" },
{ t: 0.13, text: "Just" },
{ t: 0.27, text: "Just" }, // hold for pacing
{ t: 0.4, text: "Just u" },
{ t: 0.53, text: "Just us" },
{ t: 0.67, text: "Just use" },
];
/* ================================================================
TIMELINE — built synchronously so HyperFrames can seek it.
================================================================ */
window.__timelines = window.__timelines || {};
const tl = gsap.timeline({ paused: true });
window.__timelines["main"] = tl;
{
/* Measure the brand text width with a hidden DOM probe. */
const probe = document.createElement("span");
probe.className = "measure-probe";
probe.style.font = `700 ${BRAND_FONT_SIZE}px "Google Sans", "Roboto", Inter, system-ui, sans-serif`;
probe.style.whiteSpace = "pre";
probe.style.lineHeight = "1";
probe.textContent = "Hyperframes"; // MUST match the rendered .brand-text casing
document.body.appendChild(probe);
const brandTextWidth = probe.getBoundingClientRect().width;
probe.remove();
/* Derive the hero's post-Phase-3 offset from viewport center.
baseHeroOffset = (C + G + B + L) / 2 <- heroSize cancels out
HERO_FINAL_OFFSET_X = baseHeroOffset + FINAL_RECENTER_OFFSET */
const baseHeroOffset = (COMPANION_WIDTH + COMPANION_GAP + brandTextWidth + HERO_GAP) / 2;
const HERO_FINAL_OFFSET_X = baseHeroOffset + FINAL_RECENTER_OFFSET;
/* ============================================================
PHASE 1: Discrete companion assembly
============================================================ */
const textEl = document.querySelector(".companion-text");
for (const entry of SEQUENCE) {
tl.set(textEl, { textContent: entry.text }, entry.t);
}
/* ============================================================
PHASE 2: Hero pops in (elastic)
============================================================ */
tl.fromTo(
".hero",
{ scale: 0 },
{
scale: 1,
duration: TIMING.popDur,
ease: "back.out(2)", // spring(stiffness:200, damping:12)
},
TIMING.popStart,
);
/* ============================================================
PHASE 3: Companion exit + container recenter
Two concurrent tweens at the same timeline position.
============================================================ */
tl.to(
".companion",
{
opacity: 0,
x: -80,
duration: TIMING.slideDur,
ease: "power3.out", // spring(stiffness:100, damping:20)
},
TIMING.slideStart,
);
tl.to(
".recenter-shift",
{
x: FINAL_RECENTER_OFFSET,
duration: TIMING.slideDur,
ease: "power3.out",
},
TIMING.slideStart,
);
/* ============================================================
PHASE 4: Zoom — scale (outer) + counter-translate (middle) + brand text exits.
============================================================ */
tl.to(
".zoom-scale",
{
scale: 5.5,
duration: TIMING.zoomDur,
ease: "power2.out", // spring(stiffness:80, damping:20, mass:1.5)
},
TIMING.zoomStart,
);
tl.to(
".zoom-translate",
{
x: -HERO_FINAL_OFFSET_X,
y: 0,
duration: TIMING.zoomDur,
ease: "power2.out",
},
TIMING.zoomStart,
);
// Brand text fades out + slides left so the logo gets all the zoom space.
tl.to(
".brand-text",
{
opacity: 0,
x: -600,
duration: TIMING.zoomDur * 0.4,
ease: "power2.out",
},
TIMING.zoomStart,
);
/* ============================================================
PHASE 5: Breathing — onUpdate so it MULTIPLIES on the hero's
final pop scale, doesn't overwrite it.
============================================================ */
const heroEl = document.querySelector(".hero");
const HERO_FINAL_SCALE = 1.0;
const SCALE_PERIOD = 1.5; // seconds per cycle
const SCALE_AMP = 0.04;
const ROTATE_AMP = 2;
const breathDur = TOTAL_DURATION - TIMING.breathStart;
tl.to(
{ tick: 0 },
{
tick: 1,
duration: breathDur,
ease: "none",
onUpdate: function () {
const idleTime = Math.max(0, tl.time() - TIMING.breathStart);
const omega = (idleTime / SCALE_PERIOD) * Math.PI * 2;
gsap.set(heroEl, {
scale: HERO_FINAL_SCALE * (1 + Math.sin(omega) * SCALE_AMP),
rotation: Math.sin(omega) * ROTATE_AMP,
});
},
},
TIMING.breathStart,
);
}
</script>
</body>
</html>
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