mirror of
https://github.com/heygen-com/hyperframes.git
synced 2026-11-03 20:37:30 +00:00
Miguel Ángel
f24ff83834
* feat(catalog): add the seven 3D-motion pieces as installable registry blocks Each piece ships as a registry block with a CDN poster and preview, a live catalog detail page and its source. Scripts travel inside the catalog payload (shared vendor libraries fetched once, item scripts inline, the one HDR as a data URI) because the docs host only serves fonts, images and JSON. NO_ESSAY_COMMENTS_OK: the long comment blocks are in vendored libraries and the ported frost source under registry/blocks, not hand-written here. HF_MAX_NONLFS_KB=6000: four hosted texture PNGs under docs/public/catalog/items are runtime assets the docs host must serve as files. fallow skipped locally: it audits against origin/main and this branch is stacked on an older main. * chore(catalog): regenerate gallery data and nav after rebasing onto main * fix(catalog): read the install manifest through the bounded project reader * fix(catalog): a script the inliner missed fails the payload instead of shipping a dead URL * refactor(catalog): the leftover-script check reuses the reference finder * fix(catalog): frost and glass textures load from the CDN and the iteration presets are gone * chore(catalog): regenerate the frost and glass payloads and nav * fix(catalog): frost and glass textures are hosted through the registry url field, not hardcoded * chore(catalog): regenerate the frost and glass payloads against the hosted texture URLs * fix(catalog): the hosted-reference rewrite refuses a bare name it cannot safely replace * ci(catalog): verify changed catalog payloads in headless Chrome and check the docs catalog * feat(catalog): every item page follows the shared layout with a Tune panel and tabs * fix(catalog): let the texture-mask item host its masks so its tile plays live * chore(catalog): regenerate item pages, gallery data and the texture-mask payload * chore(catalog): regenerate item pages after merging main * fix(catalog): declared-only variables get the Tune panel, Code and Docs tabs capped * feat(catalog): give the blend-difference caption a demo scene so its tile plays live * chore(catalog): live payload for the blend-difference caption * perf(catalog): heavy 3d pieces compile and draw before ready, not on the first visible frame * feat(catalog): the avatar promo card hosts its videos, audio and fonts on the CDN * feat(catalog): the avatar promo card tile plays live from its CDN-hosted media * chore(catalog): the avatar promo card plays live, no allowlist left * chore(catalog): shorten two comment blocks * chore(catalog): trim first-party comment blocks to the comment-check limits * chore(catalog): shorten two frost source comments * fix(catalog): the Docs tab renders as prose again, and the detail page honours reduced motion Frame-mode pages carry no prose wrapper, and the detail component sat inside not-prose, so the Docs slot's headings, paragraphs, links and lists had no styling at all. The slots now carry their own prose classes and the chrome around them keeps not-prose. The recorded clip also gets the reduced-motion guard the docs-snippet check requires, and the generator reads stability from the source metadata type so the scripts typecheck passes. * fix(catalog): docs-tab paragraphs render as blocks Mintlify emits paragraphs as inline spans, so two paragraphs in the Docs slot ran together. * fix(ci): drop the duplicate docs_catalog job output git's line-based auto-merge silently duplicated the outputs key when main and this branch each added it on non-adjacent lines during the rebase; oxfmt's yaml parser rejects the repeated map key. * fix(catalog): close four CodeQL alerts in the frost source * chore(catalog): allowlist the avatar-promo-card CDN asset deletions, format sync-docs-catalog check-no-main-deletions.mjs was rejecting 11 local mp4/font files this branch already deleted in favor of CDN hosting; scripts/sync-docs-catalog.mjs had one line over the 100-col print width from an earlier edit in this branch. * fix(catalog): detail tabs use docs prose spacing, Install first; previews skip no-WebGPU runners * fix(catalog): the docs tab scrolls with the page instead of a capped inner box * refactor(catalog): split the payload asset and verify scripts into single-purpose helpers * refactor(catalog): split the preview generator into single-purpose helpers * ci(catalog): fail when the committed catalog differs from generator output The docs host serves the committed catalog and nothing regenerates it, so a stale copy shipped silently. The catalog payloads job now generates into a temp dir and compares it with the committed tree. * chore(catalog): regenerate docs/public/catalog with the refactored scripts One full regeneration from an empty output tree with the current scripts. The tree grows from 58.4 MB to 65.1 MB. Two hosted assets are about 2 MB each (an avatar png and a wav); the same bytes are already committed under assets/, so HF_MAX_NONLFS_KB is raised for this commit only. * fix(catalog): run the catalog script tests under the runner they are written for The rebase put three node:test files in the vitest half of test:scripts, where they report "No test suite found". They now sit in the node --test list. * fix(catalog): a WebGPU item without an adapter shows its recorded clip and says why * ci(catalog): the drift check runs from a committed fetch mirror with no network Generation now serves every font and CDN script fetch from scripts/catalog-fetch-mirror and fails when a fetch is not in it, even if the caller swallowed the error. CATALOG_FETCH_MIRROR=record refreshes the mirror from the live network. The docs_catalog filter also watches packages/core, packages/producer and the mirror, and the 13 re-hashed font files are listed in ALLOWED_DELETIONS. * chore(catalog): clean up the temp font cache and sort the mirror index without a locale * fix(catalog): hide Tune when the clip stands in, time out the adapter request, share one check * fix(catalog): the adapter probe survives a sync throw and a hang; test the clip guard * fix(catalog): keep the adapter probe inside the component, Mintlify evaluates only exports * fix(catalog): run the detail and page generator tests in CI; no Tune flash while probing WebGPU * docs(catalog): credit vendored libraries and make each SKILL.md list what the block installs CREDITS.md names every vendored dependency with its upstream and licence, and flags the two leaf textures whose origin is still to be confirmed. Each SKILL.md Files table now comes from the block manifest and its install and render paths point at compositions/<name>/. A test checks that every path a SKILL.md names is a manifest file that exists. * fix(catalog): a declared WebGPU item passes verify by its manifest tag, not by console wording verify-catalog-payloads forgave a missing adapter only by matching the markup and the message, which library-reported errors and widgets never satisfy. The webgpu tag in the item manifest is now the owner: a tagged item ignores its page and console errors, an untagged one gets no forgiveness, and a marker payload with no html is listed instead of crashing the run. * docs(catalog): correct the credits per block and guard the mount and render paths CREDITS.md states the three.js version and vendored-or-CDN status per block, adds d3-delaunay, Clipper on the CDN and the Google Fonts loads, and lists every texture with no known origin. The SKILL.md test now also checks the mount and render paths against the manifest composition. * test(catalog): read each block manifest once in the SKILL.md file test The two checks shared a copied manifest read, which fallow flagged as a clone with a high score. * fix(catalog): commit the hosted item files a gitignore rule kept out, and check git not the disk The compositions/ and *-ad/ ignore rules matched folder names under docs/public/catalog/items, so 33 hosted fonts, textures and marks were generated but never committed and would 404 on the docs host. The rules now have a negation for that tree and the files are added. The drift check read the checkout, where git-ignored files still exist, so it passed locally and failed only in CI. It now unpacks HEAD with git archive and compares that. * fix(catalog): a tile keeps its poster until the composition has painted * fix(catalog): a tagged WebGPU item forgives only the adapter-absent error, and test the wiring The manifest webgpu tag now decides whether an item may lack an adapter, and the error wording decides which lines are that absence. Any other page or console error on the item, and every failed request, still fails. The per-item decision is one exported function the tests drive, marker payloads are parsed by a tested helper, and the SKILL.md variable counts are checked against their tables (cuboid-carousel said forty-nine for forty). * fix(catalog): the pinned group's posters load eagerly at high priority * fix(catalog): type the tile reveal test so the scripts typecheck passes * fix(catalog): stop the adapter signature matching an unrelated failed adapter request failed to request .*adapter also matched errors about other adapters. It now matches only a request for the WebGPU adapter, so a tagged item cannot hide an unrelated failure behind it. * test(catalog): a tagged item still fails on an error about some other adapter * feat(catalog): the install command sits above the preview, as on the live catalog * fix(catalog): find the install slot through Mintlify's child wrapper * fix(docs): catalog copy buttons keep their size when the label swaps to Copied * refactor(docs): name the shown copy label once in the catalog copy button * fix(docs): primary catalog button keeps a readable label on hover and after copy * fix(docs): inset the catalog tab strip and tab content to match the boxed panels
498 lines
23 KiB
Plaintext
498 lines
23 KiB
Plaintext
---
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title: "Particle Text Dissolve"
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description: "Text assembles from a seeded particle cloud (or dissolves into it): per-particle targets sampled once from the rendered text bitmap at mount, table-driven particles, zero per-particle tweens, one onUpdate painter."
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mode: "frame"
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---
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import { CatalogDetail, CatalogSlot } from "/snippets/catalog-detail.jsx";
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import { InstallCommand } from "/snippets/install-command.jsx";
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<CatalogDetail
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previewSrc="/public/catalog/components/particle-text-dissolve.json"
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compositionId="particle-text-dissolve"
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compositionSrc="compositions/components/particle-text-dissolve.html"
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title="Particle Text Dissolve"
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description="Text assembles from a seeded particle cloud (or dissolves into it): per-particle targets sampled once from the rendered text bitmap at mount, table-driven particles, zero per-particle tweens, one onUpdate painter."
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variables={[{"id":"text","type":"string","role":"content","label":"Text","description":"The line that assembles from (or dissolves into) the particle cloud.","default":"Dissolve"},{"id":"direction","type":"enum","role":"timing","label":"Direction","description":"in assembles the text from the cloud and holds it crisp; out erases the text into the cloud and holds empty.","default":"in","options":[{"value":"in","label":"Assemble in"},{"value":"out","label":"Dissolve out"}]},{"id":"density","type":"enum","role":"style","label":"Density","description":"Particle count cap for the field.","default":"med","options":[{"value":"low","label":"Low"},{"value":"med","label":"Medium"},{"value":"high","label":"High"}]},{"id":"accent","type":"enum","role":"style","label":"Accent","description":"Text and particle color: green rides --brand, blue rides --accent, violet rides --accent-2.","default":"green","options":[{"value":"green","label":"Green"},{"value":"blue","label":"Blue"},{"value":"violet","label":"Violet"}]},{"id":"exit","type":"enum","role":"timing","label":"Exit","description":"Optional departure. Default none: the end state holds until the frame cuts.","default":"none","options":[{"value":"none","label":"None"},{"value":"fade","label":"Fade"},{"value":"up","label":"Up"}]}]}
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meta={{"category":"Typography & Text","badge":"Stable","codeLines":414}}
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attribution={{"path":"registry/components/particle-text-dissolve","tags":["motion-primitive","text-effects","particles","canvas","deterministic","experiment"]}}
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hasCode
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rawUrl="https://raw.githubusercontent.com/heygen-com/hyperframes/main/registry/components/particle-text-dissolve/particle-text-dissolve.html"
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>
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<CatalogSlot slot="code">
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```html particle-text-dissolve.html
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<!doctype html>
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<!--
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particle-text-dissolve: HyperFrames video primitive (type / particles).
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Wave M8. Direct donor: particle-image-reveal (canvas determinism law).
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Text assembles FROM a seeded particle cloud, or dissolves TO it (direction
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enum). Per-particle target positions are sampled ONCE at mount from the
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rendered text bitmap: the token-styled line is rastered to an offscreen
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canvas, read back with getImageData, and every lit cell on a deterministic
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grid becomes a particle target. Particles are table-driven with ZERO
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per-particle tweens; one onUpdate painter clears and redraws the whole
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field from scratch each frame.
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direction "in": particles fly from a scattered cloud onto the glyphs while
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the crisp DOM line wipes in along the same left-to-right front; each
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particle fades as it settles, so by the end of IN the canvas is empty and
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the DOM text holds crisp and themable.
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direction "out": the crisp line holds for a beat, then erases left to
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right as particles are born on the departing glyphs and scatter outward,
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fading in flight; the HOLD is empty.
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Variables (declared in data-composition-variables below):
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- text (string, default "Dissolve"): the line that assembles/dissolves.
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- direction ("in" | "out", default "in").
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- density ("low" | "med" | "high", default "med"): particle count cap.
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- accent ("green" | "blue" | "violet", default "green"): text and
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particle color; green rides --brand, blue rides --accent, violet
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rides --accent-2.
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- exit ("none" | "fade" | "up", default "none"): frame roots own
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transitions.
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Envelope, fixed IN and OUT with elastic HOLD only (never timeScale):
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IN_BASE = 2.80s the assembly (or dissolve) plays out completely
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HOLD = max(0, D - IN - OUT); truly still: direction in holds the
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crisp DOM line, direction out holds an empty stage; either
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way the canvas is one clear rect
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OUT_BASE = 0.45s only when exit != none
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If D < IN_BASE + OUT_BASE, IN and OUT compress together.
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Determinism (canvas 2D law, per particle-image-reveal): the text bitmap
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readback and the per-particle attribute table are computed exactly once
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during synchronous timeline construction; the table's random components
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come from fixed LCG seed 0x9d1550f7. Every painted frame is a pure
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function of (table, timeline time): the anchor tween's onUpdate clears
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the canvas and redraws every particle. No Math.random, no wall clock, no
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incremental state, no requestAnimationFrame. Eventful seeks
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(suppressEvents=false, the engine's render path) repaint identically in
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any order and either direction.
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Mount contract: the runtime clones only this template. #root fills the
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host box (no data-width/data-height, container-type: size, cqmin units),
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is styled via #root only, and registers one paused timeline under the
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LITERAL "particle-text-dissolve" key. All DOM state is set with explicit
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endpoints (gsap.set + fromTo) so any seek order lands identical frames.
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-->
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<html
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lang="en"
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data-composition-id="particle-text-dissolve"
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data-composition-duration="4"
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data-composition-variables='[
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{ "id": "text", "type": "string", "role": "content", "label": "Text", "description": "The line that assembles from (or dissolves into) the particle cloud.", "default": "Dissolve" },
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{ "id": "direction", "type": "enum", "role": "timing", "label": "Direction", "description": "in assembles the text from the cloud and holds it crisp; out erases the text into the cloud and holds empty.", "default": "in", "options": [{ "value": "in", "label": "Assemble in" }, { "value": "out", "label": "Dissolve out" }] },
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{ "id": "density", "type": "enum", "role": "style", "label": "Density", "description": "Particle count cap for the field.", "default": "med", "options": [{ "value": "low", "label": "Low" }, { "value": "med", "label": "Medium" }, { "value": "high", "label": "High" }] },
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{ "id": "accent", "type": "enum", "role": "style", "label": "Accent", "description": "Text and particle color: green rides --brand, blue rides --accent, violet rides --accent-2.", "default": "green", "options": [{ "value": "green", "label": "Green" }, { "value": "blue", "label": "Blue" }, { "value": "violet", "label": "Violet" }] },
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{ "id": "exit", "type": "enum", "role": "timing", "label": "Exit", "description": "Optional departure. Default none: the end state holds until the frame cuts.", "default": "none", "options": [{ "value": "none", "label": "None" }, { "value": "fade", "label": "Fade" }, { "value": "up", "label": "Up" }] }
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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>Particle Text Dissolve</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="particle-text-dissolve" 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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position: absolute;
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inset: 0;
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overflow: hidden;
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container-type: size;
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isolation: isolate;
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color: var(--fg, #f8fafc);
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font-family: var(--font-display, "Inter", system-ui, sans-serif);
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pointer-events: none;
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}
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.ptd-clip {
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position: absolute;
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inset: 0;
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overflow: hidden;
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background: var(--bg, transparent);
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}
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.ptd-stage {
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position: absolute;
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inset: 0;
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will-change: transform, opacity;
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}
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.ptd-text {
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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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will-change: clip-path, opacity;
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}
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.ptd-line {
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color: var(--ptd-accent);
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font-weight: 600;
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line-height: 1;
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letter-spacing: 0.02em;
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white-space: nowrap;
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}
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.ptd-canvas {
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position: absolute;
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inset: 0;
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width: 100%;
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height: 100%;
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}
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</style>
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<div
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id="particle-text-dissolve-clip"
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class="ptd-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="ptd-stage">
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<div class="ptd-text">
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<span class="ptd-line"></span>
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</div>
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<canvas class="ptd-canvas" aria-hidden="true"></canvas>
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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(".ptd-stage");
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var textLayer = root.querySelector(".ptd-text");
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var line = root.querySelector(".ptd-line");
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var canvas = root.querySelector(".ptd-canvas");
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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 =
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typeof vars.text === "string" && vars.text.length > 0 ? vars.text : "Dissolve";
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var direction = vars.direction === "out" ? "out" : "in";
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var densityCaps = { low: 900, med: 1700, high: 2800 };
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var density = Object.prototype.hasOwnProperty.call(densityCaps, vars.density)
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? vars.density
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: "med";
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// Each enum choice routes to a DIFFERENT contract token so the
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// variable stays meaningful under a theme.
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var accentColors = {
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green: "var(--brand, #71f5a7)",
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blue: "var(--accent, #61a8ff)",
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violet: "var(--accent-2, #c5a3ff)",
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};
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var accent = Object.prototype.hasOwnProperty.call(accentColors, vars.accent)
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? vars.accent
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: "green";
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var exit = vars.exit === "fade" || vars.exit === "up" ? vars.exit : "none";
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root.style.setProperty("--ptd-accent", accentColors[accent]);
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line.textContent = text;
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// Envelope: fixed IN/OUT, elastic HOLD, never time-scaled.
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var IN_BASE = 2.8;
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var OUT_BASE = exit === "none" ? 0 : 0.45;
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var duration = Math.max(0.001, parseFloat(root.dataset.duration || "4"));
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var totalBase = Math.max(0.001, IN_BASE + OUT_BASE);
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var scale = duration < totalBase ? duration / totalBase : 1;
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var IN = IN_BASE * scale;
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var OUT = OUT_BASE * scale;
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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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// Canvas raster basis is fixed once at mount. Elastic root: the
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// host box decides the resolution; the same host always yields
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// the same raster, so painted frames stay byte-stable.
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var dpr = Math.min(2, Math.max(1, Number(window.devicePixelRatio) || 1));
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var box = root.getBoundingClientRect();
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var cssW = Math.max(1, Math.round(box.width) || 640);
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var cssH = Math.max(1, Math.round(box.height) || 360);
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canvas.width = Math.round(cssW * dpr);
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canvas.height = Math.round(cssH * dpr);
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var ctx = canvas.getContext("2d");
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var minDim = Math.min(canvas.width, canvas.height);
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// Resolve the accent token to a concrete color once at mount so
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// canvas fills never depend on style recalc during seeks.
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var hostDoc = root.ownerDocument;
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var probe = hostDoc.createElement("span");
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probe.style.color = accentColors[accent];
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root.appendChild(probe);
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var particleColor = getComputedStyle(probe).color || "#71f5a7";
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probe.remove();
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// Rendered-text raster, sampled ONCE at mount. The DOM line and
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// the offscreen raster share the same computed font stack and the
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// same fitted pixel size, so particle targets sit on the glyphs
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// the crisp line will draw.
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var fontFamily = getComputedStyle(line).fontFamily || "system-ui, sans-serif";
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var off = hostDoc.createElement("canvas");
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off.width = canvas.width;
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off.height = canvas.height;
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var offCtx = off.getContext("2d", { willReadFrequently: true });
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var fontPx = Math.round(canvas.height * 0.3);
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offCtx.font = "600 " + fontPx + "px " + fontFamily;
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var measured = offCtx.measureText(text).width || 1;
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var maxWidth = canvas.width * 0.86;
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if (measured > maxWidth) {
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fontPx = Math.max(8, Math.floor((fontPx * maxWidth) / measured));
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offCtx.font = "600 " + fontPx + "px " + fontFamily;
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}
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offCtx.textAlign = "center";
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offCtx.textBaseline = "middle";
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offCtx.fillStyle = "#ffffff";
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offCtx.fillText(text, off.width / 2, off.height / 2);
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// Lock the crisp DOM line to the exact raster the targets came
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// from: same family string, same device-pixel size.
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line.style.fontFamily = fontFamily;
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line.style.fontSize = fontPx / dpr + "px";
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// The LCG and every per-particle decision live here. This IIFE
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// runs once before timeline construction, then only the table is
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// read. Particle state at any time is a pure function of
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// (table row, timeline time). Zero per-particle tweens.
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var particles = (function () {
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var state = 0x9d1550f7;
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function next() {
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state = (Math.imul(1664525, state) + 1013904223) >>> 0;
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return state / 4294967296;
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}
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// Grid-sample lit cells from the readback (alpha over half).
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var data = offCtx.getImageData(0, 0, off.width, off.height).data;
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var step = Math.max(2, Math.round(minDim / 260));
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var cells = [];
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var minX = Infinity;
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var maxX = -Infinity;
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for (var y = 0; y < off.height; y += step) {
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for (var x = 0; x < off.width; x += step) {
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if (data[(y * off.width + x) * 4 + 3] > 127) {
|
|
cells.push({ x: x, y: y });
|
|
if (x < minX) minX = x;
|
|
if (x > maxX) maxX = x;
|
|
}
|
|
}
|
|
}
|
|
if (cells.length === 0) {
|
|
// Degenerate raster (empty text box): no particles, the DOM
|
|
// line still plays its wipe.
|
|
minX = 0;
|
|
maxX = 1;
|
|
}
|
|
var span = Math.max(1, maxX - minX);
|
|
// Thin deterministically to the density cap. The keep decision
|
|
// consumes exactly one LCG draw per cell in grid order, so the
|
|
// surviving set is a pure function of (raster, seed).
|
|
var cap = densityCaps[density];
|
|
var keep = cells.length > cap ? cap / cells.length : 1;
|
|
var rows = [];
|
|
for (var i = 0; i < cells.length; i += 1) {
|
|
var take = next() < keep;
|
|
if (!take) continue;
|
|
var tx = cells[i].x;
|
|
var ty = cells[i].y;
|
|
var key = (tx - minX) / span;
|
|
// The front sweeps left to right for both directions; the
|
|
// per-particle schedule completes strictly inside [0, 0.97].
|
|
var at = 0.2 + 0.62 * key + 0.05 * next();
|
|
var travel = 0.18 + 0.1 * next();
|
|
var fade = 0.05 + 0.04 * next();
|
|
var angle = next() * Math.PI * 2;
|
|
rows.push({
|
|
tx: tx,
|
|
ty: ty,
|
|
at: Math.min(0.9, at),
|
|
travel: travel,
|
|
fade: fade,
|
|
offset: (0.1 + 0.22 * next()) * minDim,
|
|
ox: Math.cos(angle),
|
|
oy: Math.sin(angle),
|
|
radius: (0.26 + 0.5 * next()) * (minDim / 200) * step * 0.5,
|
|
dim: 0.5 + 0.5 * next(),
|
|
});
|
|
}
|
|
return rows;
|
|
})();
|
|
|
|
function clamp01(v) {
|
|
return v < 0 ? 0 : v > 1 ? 1 : v;
|
|
}
|
|
|
|
// Pure repaint: clear, then draw every particle from (row, p).
|
|
// direction in: fly cloud -> glyph, fade once settled (donor
|
|
// law). direction out: born on the glyph as the front passes,
|
|
// fly outward, fade in flight. Both end all-zero by p = 1.
|
|
function paint(timeSeconds) {
|
|
ctx.clearRect(0, 0, canvas.width, canvas.height);
|
|
var p = IN > 0 ? clamp01(timeSeconds / IN) : 1;
|
|
var endClamp = clamp01((1 - p) / 0.04);
|
|
if (endClamp === 0) return;
|
|
ctx.fillStyle = particleColor;
|
|
for (var i = 0; i < particles.length; i += 1) {
|
|
var row = particles[i];
|
|
var alpha;
|
|
var dist;
|
|
if (direction === "in") {
|
|
var birth = Math.max(0, row.at - row.travel);
|
|
var u = clamp01((p - birth) / (row.at - birth));
|
|
if (u <= 0) continue;
|
|
var settled = clamp01((p - row.at) / row.fade);
|
|
alpha = clamp01(u / 0.16) * (1 - settled) * row.dim * endClamp;
|
|
var e = 1 - Math.pow(1 - u, 3);
|
|
dist = row.offset * (1 - e);
|
|
} else {
|
|
var v = clamp01((p - row.at) / row.travel);
|
|
if (v <= 0) continue;
|
|
alpha = clamp01(v / 0.14) * (1 - v) * row.dim * endClamp;
|
|
dist = row.offset * (v * v);
|
|
}
|
|
if (alpha <= 0.002) continue;
|
|
var x = row.tx + row.ox * dist;
|
|
var y = row.ty + row.oy * dist;
|
|
ctx.globalAlpha = alpha * 0.92;
|
|
ctx.beginPath();
|
|
ctx.arc(x, y, row.radius, 0, Math.PI * 2);
|
|
ctx.fill();
|
|
}
|
|
ctx.globalAlpha = 1;
|
|
}
|
|
|
|
// The crisp line wipes along the same front the particles sweep.
|
|
var clipShown = "inset(0% 0% 0% 0%)";
|
|
var clipInStart = "inset(0% 100% 0% 0%)";
|
|
var clipOutEnd = "inset(0% 0% 0% 100%)";
|
|
|
|
gsap.set(stage, { opacity: 1, y: "0cqh" });
|
|
|
|
var tl = gsap.timeline({
|
|
paused: true,
|
|
onUpdate: function () {
|
|
paint(tl.time());
|
|
},
|
|
});
|
|
|
|
// Anchor tween: an inert plain-object tween spanning the full
|
|
// authored duration so tl.time() covers [0, D] and the painter
|
|
// fires on every eventful seek, including seeks into the hold.
|
|
tl.to({ p: 0 }, { p: 1, duration: duration, ease: "none" }, 0);
|
|
|
|
if (direction === "in") {
|
|
// The line reveals behind the arriving particles.
|
|
tl.fromTo(
|
|
textLayer,
|
|
{ opacity: 0 },
|
|
{ opacity: 1, duration: IN * 0.3, ease: "power2.out" },
|
|
IN * 0.16,
|
|
);
|
|
tl.fromTo(
|
|
textLayer,
|
|
{ clipPath: clipInStart },
|
|
{ clipPath: clipShown, duration: IN * 0.76, ease: "power1.inOut" },
|
|
IN * 0.18,
|
|
);
|
|
} else {
|
|
// The line erases as the front passes; particles carry it off.
|
|
gsap.set(textLayer, { opacity: 1 });
|
|
tl.fromTo(
|
|
textLayer,
|
|
{ clipPath: clipShown },
|
|
{ clipPath: clipOutEnd, duration: IN * 0.76, ease: "power1.inOut" },
|
|
IN * 0.18,
|
|
);
|
|
}
|
|
|
|
// HOLD: truly still. The canvas is one clear rect (every alpha
|
|
// is exactly zero by the end of IN) and the line is either fully
|
|
// shown or fully clipped; nothing drifts.
|
|
|
|
// OUT: optional departure; exit none holds until the frame cuts.
|
|
if (exit === "up") {
|
|
tl.to(stage, { y: "-4cqh", duration: OUT, ease: "power2.in" }, OUT_START);
|
|
tl.to(stage, { opacity: 0, duration: OUT, ease: "power2.in" }, OUT_START);
|
|
} else if (exit === "fade") {
|
|
tl.to(stage, { opacity: 0, duration: OUT, ease: "power2.in" }, OUT_START);
|
|
}
|
|
|
|
tl.seek(0);
|
|
paint(0);
|
|
window.__timelines = window.__timelines || {};
|
|
window.__timelines["particle-text-dissolve"] = tl;
|
|
})();
|
|
</script>
|
|
</div>
|
|
</template>
|
|
</body>
|
|
</html>
|
|
```
|
|
|
|
</CatalogSlot>
|
|
|
|
<CatalogSlot slot="install">
|
|
|
|
<InstallCommand command="npx hyperframes add particle-text-dissolve" item="particle-text-dissolve" />
|
|
|
|
That writes one file: `compositions/components/particle-text-dissolve.html`.
|
|
|
|
</CatalogSlot>
|
|
|
|
<CatalogSlot slot="docs">
|
|
|
|
## Paste it into your composition
|
|
|
|
Open `compositions/components/particle-text-dissolve.html` and copy what is inside into your own composition.
|
|
|
|
A component has no size or duration of its own. It takes both from the composition
|
|
you paste it into.
|
|
|
|
## Variables
|
|
|
|
Every one of these has a default, so the piece works untouched. Set the ones you
|
|
want to change on the element:
|
|
|
|
| Variable | Default | Accepts | What it does |
|
|
| --- | --- | --- | --- |
|
|
| `text` | `Dissolve` | string | The line that assembles from (or dissolves into) the particle cloud. |
|
|
| `direction` | `in` | `in`, `out` | in assembles the text from the cloud and holds it crisp; out erases the text into the cloud and holds empty. |
|
|
| `density` | `med` | `low`, `med`, `high` | Particle count cap for the field. |
|
|
| `accent` | `green` | `green`, `blue`, `violet` | Text and particle color: green rides --brand, blue rides --accent, violet rides --accent-2. |
|
|
| `exit` | `none` | `none`, `fade`, `up` | Optional departure. Default none: the end state holds until the frame cuts. |
|
|
|
|
Set them with `data-variable-values` on the element that mounts it. These are the
|
|
defaults, so this behaves exactly like the preview above until you change one:
|
|
|
|
```html wrap
|
|
<div
|
|
data-composition-id="particle-text-dissolve"
|
|
data-composition-src="compositions/components/particle-text-dissolve.html"
|
|
data-variable-values='{"text":"Dissolve","direction":"in","density":"med","accent":"green","exit":"none"}'
|
|
></div>
|
|
```
|
|
|
|
{/* hf:generated-footer */}
|
|
|
|
Tagged `motion-primitive` `text-effects` `particles` `canvas` `deterministic` `experiment`.
|
|
|
|
## Related topics
|
|
|
|
- [Browse the complete Catalog](/catalog)
|
|
- [Add assets and Catalog items in Studio](/studio/assets-and-blocks)
|
|
- [Build a richer composition](/go-further)
|
|
|
|
</CatalogSlot>
|
|
|
|
</CatalogDetail>
|