mirror of
https://github.com/heygen-com/hyperframes.git
synced 2026-11-12 20:47:30 +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
475 lines
22 KiB
Plaintext
475 lines
22 KiB
Plaintext
---
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title: "Cursor Glyph Trail"
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description: "An actor travels an authored path depositing small dithered glyphs at its past positions, each popping in and decaying in place, stamp rate scaling with the actor's velocity."
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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/cursor-glyph-trail.json"
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compositionId="cursor-glyph-trail"
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compositionSrc="compositions/components/cursor-glyph-trail.html"
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title="Cursor Glyph Trail"
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description="An actor travels an authored path depositing small dithered glyphs at its past positions, each popping in and decaying in place, stamp rate scaling with the actor's velocity."
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variables={[{"id":"glyphs","type":"string","role":"content","label":"Glyphs","description":"Stamp charset; one glyph per stamp is chosen deterministically.","default":"░▒▓+·×"},{"id":"density","type":"enum","role":"style","label":"Density","description":"Arc-length spacing between stamps along the path.","default":"med","options":[{"value":"low","label":"Low"},{"value":"med","label":"Medium"},{"value":"high","label":"High"}]},{"id":"path","type":"enum","role":"timing","label":"Path","description":"Authored travel path preset.","default":"sweep","options":[{"value":"sweep","label":"Sweep"},{"value":"arc","label":"Arc"},{"value":"zigzag","label":"Zigzag"}]},{"id":"fade","type":"number","role":"timing","label":"Fade","description":"Per-stamp decay window in seconds, clamped 0.3 to 1.5.","default":0.8},{"id":"accent","type":"enum","role":"style","label":"Accent","description":"Trail and actor 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 settled actor 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":"Product Demo","badge":"Stable","codeLines":390}}
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attribution={{"path":"registry/components/cursor-glyph-trail","tags":["motion-primitive","demonstrate","trail","cursor","glyphs","deterministic"]}}
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hasCode
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rawUrl="https://raw.githubusercontent.com/heygen-com/hyperframes/main/registry/components/cursor-glyph-trail/cursor-glyph-trail.html"
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>
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<CatalogSlot slot="code">
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```html cursor-glyph-trail.html
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<!doctype html>
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<!--
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cursor-glyph-trail: HyperFrames video primitive (product demo / trails)
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An actor (default: a cursor dot) travels an authored path and deposits
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small dithered glyphs at its past positions. Each glyph pops in where the
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actor passed and decays in place; stamps land at fixed arc-length spacing,
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so the per-second stamp rate scales with the actor's velocity. The jh3yy
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stamp-and-decay register: the trail is the residue of the motion, and it
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has fully dissolved before the hold.
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The actor is a SLOT. Callers supply content by placing an inert template
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anywhere in the HOST page (templates never render, and the runtime wipes
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the host clip's own children on mount, so the slot lives at document
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level):
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<template data-slot="cursor-glyph-trail-actor"> ... </template>
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With no slot, the primitive renders a token cursor dot (accent core,
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hairline ring).
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Variables (declared in data-composition-variables below):
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- glyphs (string): the stamp charset; one glyph is chosen per stamp by
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a fixed-seed LCG. Default is a dithered block-and-punctuation set.
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- density ("low" | "med" | "high", default "med"): arc-length spacing
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between stamps; higher density means tighter spacing.
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- path ("sweep" | "arc" | "zigzag", default "sweep"): the authored
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travel path preset.
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- fade (number seconds, default 0.8, clamped 0.3 to 1.5): the decay
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window of each stamp; per-stamp decay varies 0.75x to 1.25x of it.
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- accent ("green" | "blue" | "violet", default "green"): green rides
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--brand, blue rides --accent, violet rides --accent-2.
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- exit ("none" | "fade" | "up", default "none"): frame roots own
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transitions; the default holds the final frame to the last pixel.
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Envelope, fixed IN and OUT with elastic HOLD only (never timeScale):
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IN_BASE = TRAVEL (2.4s) + pop (0.07s) + fade * 1.25 + 0.05s margin;
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the actor arrives at TRAVEL and every stamp's decay tween
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ends inside IN, so the HOLD is truly still
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HOLD = max(0, D - IN - OUT)
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OUT_BASE = 0.45s only when exit != none
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If D < IN_BASE + OUT_BASE, the whole envelope compresses together.
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Determinism: the stamp table (positions, times, glyph choices, jitter,
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sizes, peaks, decay multipliers) is computed exactly once during
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synchronous mount from fixed LCG seed 0x67117a11. On every timeline
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update, each stamp's opacity is recomputed as a pure function
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f(tl.time() - t_i) of its table row, and the actor's position as a pure
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function of tl.time(); stamps deliberately carry NO tweens (two
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sequential tweens on one property render in direction-dependent order
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under GSAP seeks, which breaks byte-identical frames). No Math.random
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at runtime, no wall clock, no incremental state, no
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requestAnimationFrame. Eventful seeks (suppressEvents=false, the
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engine's render path) land identical frames in any order and either
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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 "cursor-glyph-trail" key.
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-->
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<html
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lang="en"
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data-composition-id="cursor-glyph-trail"
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data-composition-duration="4"
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data-composition-variables='[
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{ "id": "glyphs", "type": "string", "role": "content", "label": "Glyphs", "description": "Stamp charset; one glyph per stamp is chosen deterministically.", "default": "░▒▓+·×" },
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{ "id": "density", "type": "enum", "role": "style", "label": "Density", "description": "Arc-length spacing between stamps along the path.", "default": "med", "options": [{ "value": "low", "label": "Low" }, { "value": "med", "label": "Medium" }, { "value": "high", "label": "High" }] },
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{ "id": "path", "type": "enum", "role": "timing", "label": "Path", "description": "Authored travel path preset.", "default": "sweep", "options": [{ "value": "sweep", "label": "Sweep" }, { "value": "arc", "label": "Arc" }, { "value": "zigzag", "label": "Zigzag" }] },
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{ "id": "fade", "type": "number", "role": "timing", "label": "Fade", "description": "Per-stamp decay window in seconds, clamped 0.3 to 1.5.", "default": 0.8 },
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{ "id": "accent", "type": "enum", "role": "style", "label": "Accent", "description": "Trail and actor 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 settled actor 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>Cursor Glyph Trail</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="cursor-glyph-trail" 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-mono, ui-monospace, "SF Mono", Menlo, Consolas, monospace);
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pointer-events: none;
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}
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.cgt-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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.cgt-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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.cgt-field {
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position: absolute;
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inset: 0;
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}
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.cgt-stamp {
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position: absolute;
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opacity: 0;
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line-height: 1;
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font-weight: 500;
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will-change: opacity;
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user-select: none;
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}
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.cgt-actor {
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position: absolute;
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opacity: 0;
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transform: translate(-50%, -50%);
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will-change: opacity;
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}
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.cgt-dot {
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width: 3.4cqmin;
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height: 3.4cqmin;
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border-radius: 50%;
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background: var(--cgt-accent);
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border: 0.35cqmin solid color-mix(in srgb, var(--fg, #f8fafc) 82%, var(--cgt-accent));
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box-shadow: 0 0.6cqmin 2.4cqmin color-mix(in srgb, var(--bg, #000000) 35%, transparent);
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}
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</style>
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<div
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id="cursor-glyph-trail-clip"
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class="cgt-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="cgt-stage">
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<div class="cgt-field" aria-hidden="true"></div>
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<div class="cgt-actor">
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<div class="cgt-dot"></div>
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</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(".cgt-stage");
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var field = root.querySelector(".cgt-field");
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var actor = root.querySelector(".cgt-actor");
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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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// Arc-length spacing (percent-of-stage units). Fixed spacing
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// along the path means the per-second stamp rate rises and
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// falls with the actor's velocity: the density law.
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var spacingByDensity = { low: 4.6, med: 2.9, high: 1.8 };
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var density = Object.prototype.hasOwnProperty.call(spacingByDensity, vars.density)
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? vars.density
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: "med";
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var pathName = vars.path === "arc" || vars.path === "zigzag" ? vars.path : "sweep";
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var glyphSource =
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typeof vars.glyphs === "string" && vars.glyphs.length > 0 ? vars.glyphs : "░▒▓+·×";
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var glyphSet = Array.from(glyphSource);
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var fadeRaw = parseFloat(vars.fade);
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var fade = isFinite(fadeRaw) ? Math.min(1.5, Math.max(0.3, fadeRaw)) : 0.8;
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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, #52525b)",
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blue: "var(--accent, #52525b)",
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violet: "var(--accent-2, #52525b)",
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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("--cgt-accent", accentColors[accent]);
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// SLOT. Caller templates live at HOST DOCUMENT level (the mount
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// wipes host-clip children, and templates never render).
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var hostDoc = root.ownerDocument;
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var slotTemplate = null;
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try {
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slotTemplate = hostDoc.querySelector(
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'template[data-slot="cursor-glyph-trail-actor"]',
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);
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} catch (error) {
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slotTemplate = null;
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}
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if (slotTemplate) {
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actor.querySelector(".cgt-dot").remove();
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actor.appendChild(hostDoc.importNode(slotTemplate.content, true));
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}
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// Envelope: fixed IN/OUT, elastic HOLD, never time-scaled.
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var POP = 0.07;
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var TRAVEL_BASE = 2.4;
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var IN_BASE = TRAVEL_BASE + POP + fade * 1.25 + 0.05;
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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 TRAVEL = TRAVEL_BASE * scale;
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var pop = POP * scale;
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var fadeEff = fade * scale;
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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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// Path presets in percent-of-stage coordinates.
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var zigzagPoints = [
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{ x: 10, y: 34 },
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{ x: 38, y: 70 },
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{ x: 64, y: 32 },
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{ x: 90, y: 64 },
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];
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function pathPoint(u) {
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if (pathName === "arc") {
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return { x: 12 + 76 * u, y: 68 - 40 * Math.sin(Math.PI * u) };
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}
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if (pathName === "zigzag") {
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var segs = zigzagPoints.length - 1;
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var s = Math.min(segs - 1e-9, Math.max(0, u * segs));
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var i = Math.floor(s);
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var f = s - i;
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var a = zigzagPoints[i];
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var b = zigzagPoints[i + 1];
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return { x: a.x + (b.x - a.x) * f, y: a.y + (b.y - a.y) * f };
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}
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// sweep: an S-curve from lower left to upper right.
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return { x: 8 + 84 * u, y: 50 + 16 * Math.cos(Math.PI * u) };
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}
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// Shared travel ease, implemented once so the stamp table and
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// the per-update actor position use the identical mapping.
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function easeInOut(t) {
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return t < 0.5 ? 2 * t * t : 1 - 2 * (1 - t) * (1 - t);
|
|
}
|
|
function clamp01(v) {
|
|
return v < 0 ? 0 : v > 1 ? 1 : v;
|
|
}
|
|
|
|
// The LCG and every per-stamp decision live here, computed once
|
|
// before timeline construction from a fixed seed. A stamp's
|
|
// opacity at any time is then a pure function of timeline time.
|
|
var lcgState = 0x67117a11;
|
|
function next() {
|
|
lcgState = (Math.imul(1664525, lcgState) + 1013904223) >>> 0;
|
|
return lcgState / 4294967296;
|
|
}
|
|
|
|
var spacing = spacingByDensity[density];
|
|
var STEPS = 600;
|
|
var stamps = [];
|
|
var acc = 0;
|
|
var prev = pathPoint(easeInOut(0));
|
|
for (var k = 1; k <= STEPS; k += 1) {
|
|
var f = k / STEPS;
|
|
var pos = pathPoint(easeInOut(f));
|
|
acc += Math.hypot(pos.x - prev.x, pos.y - prev.y);
|
|
prev = pos;
|
|
if (acc >= spacing) {
|
|
acc -= spacing;
|
|
stamps.push({
|
|
t: f * TRAVEL,
|
|
x: pos.x + (next() - 0.5) * 3.2,
|
|
y: pos.y + (next() - 0.5) * 3.2,
|
|
glyph: glyphSet[Math.floor(next() * glyphSet.length) % glyphSet.length],
|
|
rot: (next() - 0.5) * 20,
|
|
size: 1.9 + next() * 1.4,
|
|
peak: 0.45 + next() * 0.45,
|
|
mix: 55 + Math.floor(next() * 36),
|
|
fadeMul: 0.75 + next() * 0.5,
|
|
});
|
|
}
|
|
}
|
|
|
|
var fragment = hostDoc.createDocumentFragment();
|
|
for (var s = 0; s < stamps.length; s += 1) {
|
|
var row = stamps[s];
|
|
var span = hostDoc.createElement("span");
|
|
span.className = "cgt-stamp";
|
|
span.textContent = row.glyph;
|
|
span.style.left = row.x.toFixed(3) + "%";
|
|
span.style.top = row.y.toFixed(3) + "%";
|
|
span.style.fontSize = row.size.toFixed(3) + "cqmin";
|
|
span.style.transform = "translate(-50%, -50%) rotate(" + row.rot.toFixed(2) + "deg)";
|
|
span.style.color =
|
|
"color-mix(in srgb, var(--cgt-accent) " + row.mix + "%, var(--fg, #f8fafc))";
|
|
row.el = span;
|
|
fragment.appendChild(span);
|
|
}
|
|
field.appendChild(fragment);
|
|
|
|
// Pure per-update apply: the actor position and every stamp's
|
|
// opacity are functions of tl.time() alone. A stamp pops in
|
|
// over `pop` seconds and decays over its table row's window;
|
|
// by IN every value is exactly zero. Writes are idempotent, so
|
|
// the HOLD repaints identical values and stays truly still.
|
|
function stampOpacity(row, timeSeconds) {
|
|
var dt = timeSeconds - row.t;
|
|
if (dt <= 0) return 0;
|
|
if (dt < pop) {
|
|
var g = dt / pop;
|
|
return row.peak * (1 - (1 - g) * (1 - g));
|
|
}
|
|
var u = (dt - pop) / (fadeEff * row.fadeMul);
|
|
if (u >= 1) return 0;
|
|
return row.peak * (1 - u * u);
|
|
}
|
|
|
|
function applyTime(timeSeconds) {
|
|
var u = easeInOut(clamp01(TRAVEL > 0 ? timeSeconds / TRAVEL : 1));
|
|
var p = pathPoint(u);
|
|
gsap.set(actor, { left: p.x.toFixed(4) + "%", top: p.y.toFixed(4) + "%" });
|
|
for (var i = 0; i < stamps.length; i += 1) {
|
|
stamps[i].el.style.opacity = stampOpacity(stamps[i], timeSeconds).toFixed(4);
|
|
}
|
|
}
|
|
|
|
gsap.set(stage, { opacity: 1, y: "0cqh" });
|
|
|
|
var tl = gsap.timeline({
|
|
paused: true,
|
|
onUpdate: function () {
|
|
applyTime(tl.time());
|
|
},
|
|
});
|
|
|
|
// Anchor tween: an inert plain-object tween spanning the full
|
|
// authored duration so the timeline covers [0, D], onUpdate
|
|
// fires for every eventful seek, and holds never clamp short.
|
|
tl.to({ p: 0 }, { p: 1, duration: duration, ease: "none" }, 0);
|
|
|
|
// Actor entrance: both endpoints authored.
|
|
tl.fromTo(
|
|
actor,
|
|
{ opacity: 0 },
|
|
{ opacity: 1, duration: 0.18 * scale, ease: "power2.out" },
|
|
0,
|
|
);
|
|
|
|
// Stamps carry no tweens: their opacity rides applyTime's pure
|
|
// table evaluation, and each decay completes inside IN by
|
|
// construction.
|
|
|
|
// HOLD: truly still. All stamps are exactly zero by IN and the
|
|
// actor rests at path(1); repeated repaints write identical
|
|
// values.
|
|
|
|
// 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);
|
|
applyTime(0);
|
|
window.__timelines = window.__timelines || {};
|
|
window.__timelines["cursor-glyph-trail"] = tl;
|
|
})();
|
|
</script>
|
|
</div>
|
|
</template>
|
|
</body>
|
|
</html>
|
|
```
|
|
|
|
</CatalogSlot>
|
|
|
|
<CatalogSlot slot="install">
|
|
|
|
<InstallCommand command="npx hyperframes add cursor-glyph-trail" item="cursor-glyph-trail" />
|
|
|
|
That writes one file: `compositions/components/cursor-glyph-trail.html`.
|
|
|
|
</CatalogSlot>
|
|
|
|
<CatalogSlot slot="docs">
|
|
|
|
## Paste it into your composition
|
|
|
|
Open `compositions/components/cursor-glyph-trail.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 |
|
|
| --- | --- | --- | --- |
|
|
| `glyphs` | `░▒▓+·×` | string | Stamp charset; one glyph per stamp is chosen deterministically. |
|
|
| `density` | `med` | `low`, `med`, `high` | Arc-length spacing between stamps along the path. |
|
|
| `path` | `sweep` | `sweep`, `arc`, `zigzag` | Authored travel path preset. |
|
|
| `fade` | `0.8` | number | Per-stamp decay window in seconds, clamped 0.3 to 1.5. |
|
|
| `accent` | `green` | `green`, `blue`, `violet` | Trail and actor color: green rides --brand, blue rides --accent, violet rides --accent-2. |
|
|
| `exit` | `none` | `none`, `fade`, `up` | Optional departure. Default none: the settled actor 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="cursor-glyph-trail"
|
|
data-composition-src="compositions/components/cursor-glyph-trail.html"
|
|
data-variable-values='{"glyphs":"░▒▓+·×","density":"med","path":"sweep","fade":0.8,"accent":"green","exit":"none"}'
|
|
></div>
|
|
```
|
|
|
|
{/* hf:generated-footer */}
|
|
|
|
Tagged `motion-primitive` `demonstrate` `trail` `cursor` `glyphs` `deterministic`.
|
|
|
|
## 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>
|