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521 lines
18 KiB
HTML
521 lines
18 KiB
HTML
<!doctype html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=1920, height=1080" />
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<title>Scene 7 — HyperFrames Decrypt Pan Track</title>
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<!--
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HyperFrames composition.tsx.
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Choreography (4 phases, 7 seconds total):
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0.0 – 0.7s Shot 1 static text fades in + rises ("HyperFrames renders")
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0.7 – 1.6s Hacker-flip decodes the accent word ("video")
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2.8 – 3.5s Horizontal pan to Shot 2 with parallax exit + scale-in
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3.7 – 6.1s Cursor-tracked typing: "HTML, CSS and JS become MP4"
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(NOT @the source/layout-utils, NOT a charWidthRatio constant)
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- Bar width pre-allocated from the full text — never tweened
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- Camera follows cursor by tweening the strip's `x`, with a piecewise
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Math.min(initialOffset, trackingOffset) for the two-phase camera
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- Hacker-flip glyph flicker via deterministic int hash, not Math.random
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-->
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<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
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<style>
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:root {
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--bg: linear-gradient(
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135deg,
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#3a3a3a 0%,
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#17211f 30%,
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#0b2328 48%,
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#1f3518 70%,
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#343434 100%
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);
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--text-dark: #f8fafc;
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--text-highlight: #18d9e8;
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--text-highlight-2: #7bea5a;
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--search-bg: rgba(14, 24, 23, 0.82);
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--cursor: #7bea5a;
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}
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* {
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margin: 0;
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padding: 0;
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box-sizing: border-box;
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}
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html,
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body {
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margin: 0;
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width: 1920px;
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height: 1080px;
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overflow: hidden;
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background: var(--bg);
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font-family:
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"Inter",
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system-ui,
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-apple-system,
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sans-serif;
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color: var(--text-dark);
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}
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.viewport {
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position: absolute;
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inset: 0;
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overflow: hidden;
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}
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.strip {
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display: flex;
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height: 100%;
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will-change: transform;
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}
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.shot {
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width: 1920px;
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height: 100%;
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position: relative;
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flex-shrink: 0;
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}
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/* ============================================================
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SHOT 1 — "HyperFrames renders video"
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============================================================ */
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.shot1-content {
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position: absolute;
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inset: 0;
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display: flex;
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align-items: center;
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justify-content: center;
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opacity: 0; /* GSAP fromTo fades in */
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}
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.shot1-row {
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display: flex;
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align-items: baseline;
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gap: 0.4em;
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font-size: 130px;
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}
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.shot1-static {
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font-weight: 500;
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color: var(--text-dark);
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text-shadow: 0 0 36px rgba(24, 217, 232, 0.18);
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}
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.shot1-accent {
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font-weight: 700;
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display: flex;
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perspective: 800px; /* required for the per-glyph rotateX */
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}
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.flip-glyph {
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position: relative;
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display: inline-block;
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min-width: 0;
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}
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.flip-glyph.space {
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min-width: 0.4em;
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}
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.flip-glyph .ghost {
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opacity: 0;
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}
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.flip-glyph .anim {
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position: absolute;
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left: 0;
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top: 0;
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width: 100%;
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color: var(--text-highlight);
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background: linear-gradient(135deg, var(--text-highlight) 0%, var(--text-highlight-2) 100%);
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-webkit-background-clip: text;
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background-clip: text;
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-webkit-text-fill-color: transparent;
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filter: drop-shadow(0 0 24px rgba(24, 217, 232, 0.32))
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drop-shadow(0 0 36px rgba(123, 234, 90, 0.22));
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opacity: 0;
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transform: perspective(600px) rotateX(90deg);
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transform-origin: bottom;
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backface-visibility: hidden;
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}
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/* ============================================================
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SHOT 2 — Search bar with cursor-tracked typing
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============================================================ */
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.shot2-bar {
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position: absolute;
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top: 50%;
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/* left set by JS once we know the bar's world coordinate */
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height: 240px;
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background: var(--search-bg);
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border: 1px solid rgba(123, 234, 90, 0.22);
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box-shadow:
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0 0 60px rgba(24, 217, 232, 0.2),
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0 0 96px rgba(123, 234, 90, 0.14),
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inset 0 0 32px rgba(24, 217, 232, 0.08);
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border-radius: 999px;
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display: flex;
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align-items: center;
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padding-left: 120px;
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padding-right: 180px;
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opacity: 0; /* GSAP fromTo fades in */
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transform-origin: left center;
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}
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.search-text {
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font-size: 120px;
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font-weight: 400;
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color: var(--text-dark);
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text-shadow: 0 0 24px rgba(248, 250, 252, 0.16);
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white-space: pre;
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line-height: 1;
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}
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.search-cursor {
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font-size: 120px;
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color: var(--cursor);
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text-shadow: 0 0 26px rgba(123, 234, 90, 0.42);
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margin-left: 4px;
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font-weight: 300;
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line-height: 1;
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}
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/* Hidden probe used by measureNodeWidth */
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.measure-probe {
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position: absolute;
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left: -99999px;
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top: -99999px;
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visibility: hidden;
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white-space: pre;
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}
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</style>
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</head>
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<body>
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<div
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id="root"
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data-composition-id="main"
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data-start="0"
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data-duration="7"
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data-width="1920"
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data-height="1080"
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>
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<div class="viewport" data-layout-allow-overflow>
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<div class="strip" data-layout-allow-overflow>
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<!-- =====================================================
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SHOT 1 — "HyperFrames renders video"
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===================================================== -->
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<div
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id="shot-decode"
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class="shot shot1 clip"
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data-start="0"
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data-duration="3.5"
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data-track-index="1"
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>
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<div class="shot1-content">
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<div class="shot1-row">
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<span class="shot1-static">HyperFrames renders</span>
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<span class="shot1-accent" aria-label="video">
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<!-- .flip-glyph spans generated by JS -->
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</span>
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</div>
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</div>
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</div>
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<!-- =====================================================
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SHOT 2 — Search bar typing
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===================================================== -->
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<div
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id="shot-typing"
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class="shot shot2 clip"
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data-start="2.5"
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data-duration="4.5"
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data-track-index="2"
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>
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<div class="shot2-bar">
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<span class="search-text"></span><span class="search-cursor">_</span>
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</div>
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</div>
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</div>
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</div>
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</div>
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<script>
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/* ================================================================
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CONSTANTS — all baked at setup time.
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================================================================ */
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const W = 1920,
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H = 1080;
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const COMPOSITION_DURATION = 7;
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const FPS_HASH = 60; // synthetic clock for the flicker hash
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const TIMING = {
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// Phase 1: shot1 text fades in + rises
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shot1EntryStart: 0.0,
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shot1EntryDur: 0.67,
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// Phase 2: hacker-flip "video"
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flipStart: 0.7,
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flipStagger: 0.066, // ~2 frames at 30fps per glyph
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flipDuration: 0.55,
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// Phase 3: horizontal pan
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panStart: 2.83,
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panDuration: 0.67,
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// Phase 4: cursor-tracked typing
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typingStart: 3.67, // panStart + panDuration + 0.17 buffer
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charRate: 0.083, // seconds per character (~2.5 frames at 30fps)
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};
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const FULL_TEXT = "HTML, CSS and JS become MP4";
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const FONT_SIZE = 120;
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const PADDING_LEFT = 120;
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const PADDING_RIGHT = 180;
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const CURSOR_VIS_W = FONT_SIZE * 0.6; // visual cursor width approximation
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const CURSOR_TARGET = W * 0.7; // screen X where cursor locks
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const BAR_LEFT_MARGIN = 80; // initial left margin in Phase 4
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const PARALLAX_DIST = 400; // px Shot 1 moves extra during pan
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/* ================================================================
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BUILD DOM — flip glyphs (Shot 1) generated synchronously.
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The accent text is "video" → 5 glyphs.
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================================================================ */
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const accentEl = document.querySelector(".shot1-accent");
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const ACCENT_WORD = "video";
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ACCENT_WORD.split("").forEach((char, index) => {
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const span = document.createElement("span");
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span.className = "flip-glyph" + (char === " " ? " space" : "");
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span.dataset.char = char;
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span.dataset.index = String(index);
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// Each glyph needs its own font-size to match the surrounding row.
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span.style.fontSize = "130px";
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const ghost = document.createElement("span");
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ghost.className = "ghost";
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ghost.textContent = char === " " ? " " : char;
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const anim = document.createElement("span");
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anim.className = "anim";
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anim.textContent = char === " " ? " " : char;
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span.append(ghost, anim);
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accentEl.appendChild(span);
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});
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/* ================================================================
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TEXT MEASUREMENT — uses a hidden DOM probe so we capture
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real letter-spacing, kerning, and font-feature widths.
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Must run AFTER document.fonts.ready.
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================================================================ */
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function measureNodeWidth(text, font) {
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const probe = document.createElement("span");
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probe.className = "measure-probe";
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probe.style.font = font;
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probe.style.whiteSpace = "pre";
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probe.textContent = text;
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document.body.appendChild(probe);
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const width = probe.getBoundingClientRect().width;
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probe.remove();
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return width;
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}
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/* ================================================================
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TIMELINE BUILD — fires after fonts are ready so measurements
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use the real rendered metrics, not fallback fonts.
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================================================================ */
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window.__timelines = window.__timelines || {};
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const tl = gsap.timeline({ paused: true });
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// Register early so HF can find it; tweens are added below.
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window.__timelines["main"] = tl;
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document.fonts.ready.then(() => {
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const searchFont = `400 ${FONT_SIZE}px Inter, system-ui, sans-serif`;
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const fullTextWidth = measureNodeWidth(FULL_TEXT, searchFont);
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const barWidth = PADDING_LEFT + fullTextWidth + CURSOR_VIS_W + PADDING_RIGHT;
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// Pre-allocate the bar's final width — no width tweens ever.
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const barEl = document.querySelector(".shot2-bar");
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barEl.style.width = barWidth + "px";
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// Initial bar position in Shot 2's local space.
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// We position it at LEFT_MARGIN from the shot's left edge.
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barEl.style.left = BAR_LEFT_MARGIN + "px";
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barEl.style.transform = "translateY(-50%)"; // vertical center
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// ============================================================
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// PHASE 1: Shot 1 text fade in + rise
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// ============================================================
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tl.fromTo(
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".shot1-content",
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{ opacity: 0, y: 30 },
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{
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opacity: 1,
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y: 0,
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duration: TIMING.shot1EntryDur,
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ease: "power2.out",
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},
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TIMING.shot1EntryStart,
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);
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// ============================================================
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// PHASE 2: Hacker-flip "video"
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// ============================================================
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const CHAR_POOL = "abcdefghijklmnopqrstuvwxyz";
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const FLICKER = 3;
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const REVEAL_AT = 0.6;
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// Deterministic 32-bit mix — replaces Math.random / seeded RNG.
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function pseudoHash(i, t) {
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return ((i * 374761393 + t * 668265263) >>> 0) % CHAR_POOL.length;
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}
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document.querySelectorAll(".flip-glyph").forEach((glyph) => {
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const index = Number(glyph.dataset.index);
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const real = glyph.dataset.char === " " ? " " : glyph.dataset.char;
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const anim = glyph.querySelector(".anim");
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const start = TIMING.flipStart + index * TIMING.flipStagger;
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tl.fromTo(
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anim,
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{ rotationX: 90, opacity: 0, "--p": 0 },
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{
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rotationX: 0,
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opacity: 1,
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"--p": 1,
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duration: TIMING.flipDuration,
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ease: "back.out(1.6)", // spring(stiffness:150, damping:14)
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onUpdate: function () {
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const p = Number(gsap.getProperty(anim, "--p"));
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if (p >= REVEAL_AT) {
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if (anim.textContent !== real) anim.textContent = real;
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} else {
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const localFrame = Math.floor((tl.time() - start) * FPS_HASH);
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const bucket = Math.max(0, Math.floor(localFrame / FLICKER));
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anim.textContent = CHAR_POOL[pseudoHash(index, bucket)];
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}
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},
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},
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start,
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);
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});
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// ============================================================
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// PHASE 3: Horizontal pan + parallax exit + Shot 2 entry
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// All three tweens at the same timeline position run in parallel.
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// ============================================================
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// (a) Camera pan — strip slides one full viewport left.
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tl.to(
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".strip",
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{
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x: -W,
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duration: TIMING.panDuration,
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ease: "power3.inOut", // cinematic slow-in-slow-out
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},
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TIMING.panStart,
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);
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// (b) Shot 1 parallax exit — content moves EXTRA -PARALLAX_DIST.
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tl.to(
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".shot1-content",
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{
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x: -PARALLAX_DIST,
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duration: TIMING.panDuration,
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ease: "power3.inOut",
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},
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TIMING.panStart,
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);
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// Shot 1 fades out partway through the pan so the eye lands on Shot 2.
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tl.to(
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".shot1-content",
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{
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opacity: 0,
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duration: TIMING.panDuration * 0.4,
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ease: "power2.out",
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},
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TIMING.panStart,
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);
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// (c) Shot 2 bar entry — fade + scale with mild overshoot ("landing").
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tl.fromTo(
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".shot2-bar",
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{ opacity: 0, scale: 0.8 },
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{
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opacity: 1,
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scale: 1,
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duration: TIMING.panDuration,
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ease: "back.out(1.2)",
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},
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TIMING.panStart,
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);
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// ============================================================
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// PHASE 4: Cursor-tracked typing.
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//
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// The strip is now at x = -W (Shot 2 fully on screen). For the
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// cursor-track effect we'll *further* shift the strip by a piecewise
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// amount: hold initial offset while the empty bar's cursor is left
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// of CURSOR_TARGET, then follow once typing pushes it past.
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// ============================================================
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const searchTextEl = document.querySelector(".search-text");
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const stripEl = document.querySelector(".strip");
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const CURSOR_WIDTH_HALF = CURSOR_VIS_W / 2;
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const STRIP_BASE_X = -W; // strip's x at the end of Phase 3
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// Initial Phase-4 offset = 0 (no additional shift on top of -W).
|
||
// i.e. bar already sits at BAR_LEFT_MARGIN inside Shot 2.
|
||
const INITIAL_OFFSET = 0;
|
||
|
||
// Typing driver — a clock that runs from 0 to FULL_TEXT.length.
|
||
const typingProxy = { progress: 0 };
|
||
const typingDur = FULL_TEXT.length * TIMING.charRate;
|
||
const typingEnd = TIMING.typingStart + typingDur;
|
||
const postTypingHold = Math.max(0, COMPOSITION_DURATION - typingEnd);
|
||
|
||
tl.to(
|
||
typingProxy,
|
||
{
|
||
progress: FULL_TEXT.length,
|
||
duration: typingDur,
|
||
ease: "none",
|
||
onUpdate: function () {
|
||
const charsTyped = Math.min(FULL_TEXT.length, Math.floor(typingProxy.progress));
|
||
const visibleText = FULL_TEXT.slice(0, charsTyped);
|
||
if (searchTextEl.textContent !== visibleText) {
|
||
searchTextEl.textContent = visibleText;
|
||
}
|
||
|
||
// Measure current visible width to compute cursor screen position.
|
||
// Cheap because Inter's metrics are cached after the first call.
|
||
const visibleW =
|
||
visibleText.length === 0 ? 0 : measureNodeWidth(visibleText, searchFont);
|
||
|
||
// Cursor X in *Shot 2's* coordinate system:
|
||
// shot left edge → bar left edge (BAR_LEFT_MARGIN)
|
||
// → cursor within bar (PADDING_LEFT + visibleW + CURSOR_WIDTH_HALF)
|
||
const cursorXInShot2 = BAR_LEFT_MARGIN + PADDING_LEFT + visibleW + CURSOR_WIDTH_HALF;
|
||
|
||
// For the cursor to land at CURSOR_TARGET on the *screen*, the
|
||
// strip must be shifted by:
|
||
// stripX = CURSOR_TARGET - cursorXInShot2 - W (the -W accounts
|
||
// for Shot 2 being the SECOND shot in the strip)
|
||
const trackingStripX = CURSOR_TARGET - cursorXInShot2 - W;
|
||
|
||
// Piecewise: hold STRIP_BASE_X + INITIAL_OFFSET until tracking
|
||
// would pan FURTHER LEFT than the base, then follow.
|
||
const finalStripX = Math.min(STRIP_BASE_X + INITIAL_OFFSET, trackingStripX);
|
||
|
||
gsap.set(stripEl, { x: finalStripX });
|
||
},
|
||
},
|
||
TIMING.typingStart,
|
||
);
|
||
|
||
if (postTypingHold > 0) {
|
||
tl.to(
|
||
".search-cursor",
|
||
{
|
||
opacity: 0.22,
|
||
duration: postTypingHold / 2,
|
||
repeat: 1,
|
||
yoyo: true,
|
||
ease: "none",
|
||
},
|
||
typingEnd,
|
||
);
|
||
}
|
||
});
|
||
</script>
|
||
</body>
|
||
</html>
|