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This reverts commit 3b53bfd2f7.
This commit is contained in:
Miguel Ángel
-324
@@ -1,324 +0,0 @@
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<!doctype html>
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<!--
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beat-accent: HyperFrames video primitive (effects / burst / emphasize)
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Concept: a single music-hit sting. A centered word snaps up in scale as a
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radial impact flash erupts behind it, shakes by a small amount, then settles
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immediately. One mechanic, one job: visual punctuation on one beat during IN.
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This burst fires once and never loops. HOLD stays deliberately calm and still
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after the decay.
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Compiled-from evidence: Video Primitives v1 GAP C1, "sting: impact
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flash/scale on a music hit." The candidates catalog describes a C1 gap:
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music-driven films need visual punctuation on the downbeat and had nothing
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atomic to reach for. A declared sync point makes the primitive weldable to
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any audio hit. Catalog shelf: effects / burst / emphasize. The impact uses
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the easing vocabulary's --ease-slam, GSAP expo.out, with the CSS mirror
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cubic-bezier(0.19, 1, 0.22, 1), kept brief per taste rule 3.
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Use when: one downbeat, edit point, reveal, or hard musical hit needs a short
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visual accent. Mount it over the subject or use its centered word as the
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subject. Do not use it as an ambient loop or a repeated visualizer.
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Variables (declared in data-composition-variables below):
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- text (string, default "BOOM"): the word or label that receives the hit.
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- flashColor (enum, default "accent"): accent, soft accent, or bright
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accent. Every option is derived from var(--accent), so theme changes
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always repaint the flash.
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- intensity (number, 0.5 to 2, default 1, step 0.1): scales subject pulse,
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flash opacity and spread, and shake distance as one legible control.
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Envelope (fixed IN/OUT, elastic HOLD only, never gsap.timeScale()):
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IN_BASE = 0.90s, calm lead, impact snap, flash, shake, and full decay
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HOLD = elastic = max(0, D - (IN_BASE + OUT_BASE)), deliberately still
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OUT_BASE = 0.40s, clean release fade
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If D < IN_BASE + OUT_BASE, IN and OUT scale down together so IN + OUT == D
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and HOLD == 0. All fixed offsets and motion durations use the same scale.
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Sync point: impact-hard lands at IMPACT_AT = 0.25s into an unscaled IN. It
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scales proportionally only when the full envelope is compressed. ADR-0007
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requires declared sync points to remain in a fixed phase, never inside the
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elastic HOLD, so audio and visual timing cannot drift as duration changes.
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Sound cue: the primitive never plays audio. At IMPACT_AT it dispatches a
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bubbling `hf:sfx` CustomEvent with detail { id: "impact-hard", t: IMPACT_AT }.
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A host mix stage may catch that event and route the id to its chosen asset.
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Mount contract: this file is a MOUNTABLE SUB-COMPOSITION, not a standalone
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composition. A host loads it via data-composition-src; the runtime clones
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only <template> contents, while everything outside <template>, including
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<head>, is discarded on mount. #root has no data-width or data-height. It is
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styled by id, never by class, and fills the host box with position:absolute,
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inset:0, container-type:size. Variables are read through
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window.__hyperframes.getVariables(), never by parsing document.documentElement,
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because the mounted document element belongs to the host composition.
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-->
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<html
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lang="en"
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data-composition-variables='[
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{ "id": "text", "type": "string", "role": "content", "label": "Accent text", "description": "Word or short label emphasized by the beat hit.", "default": "BOOM" },
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{ "id": "flashColor", "type": "enum", "role": "style", "label": "Flash color", "description": "Token-backed accent tone used by the radial flash.", "default": "accent", "options": [{ "value": "accent", "label": "Accent" }, { "value": "soft", "label": "Soft accent" }, { "value": "bright", "label": "Bright accent" }] },
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{ "id": "intensity", "type": "number", "role": "timing", "label": "Intensity", "description": "Strength of the scale pulse, flash, and shake.", "default": 1, "min": 0.5, "max": 2, "step": 0.1 }
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]'
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>
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<head>
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<meta charset="UTF-8" />
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<title>Beat Accent</title>
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</head>
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<body>
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<template>
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<div id="root" data-composition-id="beat-accent" data-duration="4" data-fps="30">
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<style>
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*,
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*::before,
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*::after {
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box-sizing: border-box;
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}
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#root {
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--ease-slam: cubic-bezier(0.19, 1, 0.22, 1);
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--ba-flash-color: var(--accent, #ff4f8b);
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position: absolute;
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inset: 0;
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container-type: size;
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isolation: isolate;
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overflow: hidden;
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background: var(--bg, #0b1120);
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color: var(--fg, #f8fafc);
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font-family: var(--font-body, system-ui, sans-serif);
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pointer-events: none;
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}
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.ba-clip {
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position: absolute;
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inset: 0;
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display: grid;
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place-items: center;
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overflow: hidden;
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}
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.ba-stage {
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position: relative;
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width: 100%;
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height: 100%;
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display: grid;
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place-items: center;
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will-change: transform, opacity;
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}
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.ba-flash {
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position: absolute;
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width: 62cqw;
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aspect-ratio: 1;
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border-radius: 50%;
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background: radial-gradient(
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circle,
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color-mix(in srgb, var(--ba-flash-color) 92%, transparent) 0%,
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color-mix(in srgb, var(--ba-flash-color) 54%, transparent) 24%,
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color-mix(in srgb, var(--ba-flash-color) 16%, transparent) 48%,
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transparent 72%
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);
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opacity: 0;
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will-change: transform, opacity;
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}
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.ba-flash::after {
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content: "";
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position: absolute;
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inset: 22%;
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border: 0.45cqmin solid color-mix(in srgb, var(--ba-flash-color) 78%, transparent);
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border-radius: 50%;
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}
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.ba-subject {
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position: relative;
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z-index: 1;
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display: block;
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width: 86cqw;
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color: var(--fg, #f8fafc);
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font-family: var(--font-display, var(--font-body, system-ui, sans-serif));
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font-size: 20cqmin;
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font-weight: 900;
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line-height: 0.9;
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letter-spacing: -0.055em;
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text-align: center;
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text-transform: uppercase;
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white-space: nowrap;
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overflow: hidden;
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text-overflow: ellipsis;
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text-shadow:
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0 0 2cqmin color-mix(in srgb, var(--accent, #ff4f8b) 46%, transparent),
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0 1.2cqh 3.8cqh color-mix(in srgb, var(--bg, #0b1120) 68%, transparent);
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transform-origin: 50% 50%;
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will-change: transform;
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}
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</style>
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<div
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id="beat-accent-clip"
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class="ba-clip clip"
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data-start="0"
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data-duration="4"
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data-track-index="0"
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>
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<div class="ba-stage">
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<div class="ba-flash" aria-hidden="true"></div>
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<div class="ba-subject"></div>
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</div>
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</div>
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<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
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<script>
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(function () {
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"use strict";
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var root = document.getElementById("root");
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var stage = root.querySelector(".ba-stage");
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var flash = root.querySelector(".ba-flash");
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var subject = root.querySelector(".ba-subject");
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var vars =
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window.__hyperframes && window.__hyperframes.getVariables
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? window.__hyperframes.getVariables()
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: {};
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var text = vars.text == null ? "BOOM" : String(vars.text);
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var flashChoice =
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vars.flashColor === "soft" || vars.flashColor === "bright"
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? vars.flashColor
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: "accent";
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var intensityValue = Number(vars.intensity);
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var intensity = Number.isFinite(intensityValue)
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? Math.max(0.5, Math.min(2, intensityValue))
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: 1;
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var flashColors = {
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accent: "var(--accent, #ff4f8b)",
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soft: "color-mix(in srgb, var(--accent, #ff4f8b) 70%, var(--bg, #0b1120))",
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bright: "color-mix(in srgb, var(--accent, #ff4f8b) 72%, var(--fg, #f8fafc))",
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};
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subject.textContent = text;
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root.style.setProperty("--ba-flash-color", flashColors[flashChoice]);
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var IN_BASE = 0.9;
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var OUT_BASE = 0.4;
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var IMPACT_AT_BASE = 0.25;
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var SNAP_BASE = 0.12;
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var SETTLE_BASE = 0.28;
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var FLASH_IN_BASE = 0.08;
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var FLASH_OUT_BASE = 0.28;
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var duration = Math.max(0.001, parseFloat(root.dataset.duration || "4"));
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var totalBase = IN_BASE + OUT_BASE;
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var envelopeScale = duration < totalBase ? duration / totalBase : 1;
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var IN = IN_BASE * envelopeScale;
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var OUT = OUT_BASE * envelopeScale;
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var IMPACT_AT = IMPACT_AT_BASE * envelopeScale;
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var SNAP = SNAP_BASE * envelopeScale;
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var SETTLE = SETTLE_BASE * envelopeScale;
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var FLASH_IN = FLASH_IN_BASE * envelopeScale;
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var FLASH_OUT = FLASH_OUT_BASE * envelopeScale;
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var HOLD = Math.max(0, duration - (IN + OUT));
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var OUT_START = IN + HOLD;
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var restScale = 1 - 0.06 * intensity;
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var peakScale = 1 + 0.18 * intensity;
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var flashPeakScale = 0.78 + 0.3 * intensity;
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var flashEndScale = 1.08 + 0.32 * intensity;
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var flashPeakOpacity = Math.min(0.96, 0.5 + 0.23 * intensity);
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var shakeX = 0.9 * intensity;
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var shakeY = 0.34 * intensity;
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gsap.set(stage, { x: 0, y: 0, opacity: 1 });
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gsap.set(subject, { scale: restScale });
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gsap.set(flash, { scale: 0.25, opacity: 0 });
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var tl = gsap.timeline({ paused: true });
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tl.to(subject, { scale: peakScale, duration: SNAP, ease: "expo.out" }, IMPACT_AT);
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tl.to(subject, { scale: 1, duration: SETTLE, ease: "power3.out" }, IMPACT_AT + SNAP);
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tl.to(
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flash,
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{
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scale: flashPeakScale,
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opacity: flashPeakOpacity,
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duration: FLASH_IN,
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ease: "expo.out",
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},
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IMPACT_AT,
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);
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tl.to(
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flash,
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{ scale: flashEndScale, opacity: 0, duration: FLASH_OUT, ease: "power3.out" },
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IMPACT_AT + FLASH_IN,
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);
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tl.to(
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stage,
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{
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x: shakeX + "cqw",
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y: -shakeY + "cqh",
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duration: 0.04 * envelopeScale,
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ease: "none",
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},
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IMPACT_AT,
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);
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tl.to(
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stage,
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{
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x: -shakeX * 0.7 + "cqw",
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y: shakeY * 0.75 + "cqh",
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duration: 0.05 * envelopeScale,
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ease: "none",
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},
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IMPACT_AT + 0.04 * envelopeScale,
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);
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tl.to(
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stage,
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{
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x: shakeX * 0.3 + "cqw",
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y: -shakeY * 0.35 + "cqh",
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duration: 0.05 * envelopeScale,
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ease: "none",
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},
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IMPACT_AT + 0.09 * envelopeScale,
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);
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tl.to(
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stage,
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{
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x: 0,
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y: 0,
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duration: 0.12 * envelopeScale,
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ease: "power3.out",
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},
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IMPACT_AT + 0.14 * envelopeScale,
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);
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tl.call(
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function () {
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root.dispatchEvent(
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new CustomEvent("hf:sfx", {
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detail: { id: "impact-hard", t: IMPACT_AT },
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bubbles: true,
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}),
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);
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},
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[],
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IMPACT_AT,
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);
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tl.to(stage, { opacity: 0, duration: OUT, ease: "power2.out" }, OUT_START);
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tl.seek(0);
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window.__timelines = window.__timelines || {};
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// Literal id is required. Mount flattening strips data-composition-id
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// from this inner root, so reading the id from root would register
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// under null and leave the host unable to find this timeline.
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window.__timelines["beat-accent"] = tl;
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})();
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</script>
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</div>
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</template>
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</body>
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</html>
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