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* feat(registry): hw write-on wave — hw-write-title block + control surfaces for four hw components Adds hw-write-title (true glyph write-on: pen-traced Caveat via baked centerline masks, curvature-adaptive pen velocity, pen lifts, underline) and grows the handwritten family's four components with declared control surfaces (controls per the #3227 convention), the completed stroke-texture matrix (sharp + deterministic seeded spray — no feTurbulence), boil poses, and physically-derived arrival deformation (travel-aligned squash with volume preserved and spring recovery). Shipped single-path callers keep working unchanged (legacy helper bodies preserved; proven in a legacy wiring harness). Validated in one reference build: check clean, double-render framemd5 910/910 bit-identical, seek-shuffle 8/8, WCAG 2.3.1 flash-scan zero violations, physics burn-ins hand-recomputed. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * fix(catalog): index hw-write-title for meaning search --------- Co-authored-by: Claude Fable 5 <noreply@anthropic.com> Co-authored-by: Miguel Ángel <miguel.sierra@heygen.com>
717 lines
30 KiB
Plaintext
717 lines
30 KiB
Plaintext
---
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title: "Hand-Drawn Arrow"
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description: "Wobbled draw-on arrow with straight, gentle, and swoop curve poses, a four-way stroke texture matrix (plain/soft/sharp/spray), and a travel-aligned head-arrival stretch pulse with spring recovery; boils while on screen"
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---
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import { InstallCommand } from "/snippets/install-command.jsx";
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<iframe
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className="w-full aspect-video rounded-xl border-0 bg-zinc-100 dark:bg-zinc-800"
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title="hw-arrow preview"
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loading="lazy"
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srcDoc={`<!doctype html><html><head><meta charset="utf-8"><style>html,body{margin:0;height:100%;overflow:hidden;background:transparent}hyperframes-player{display:block;width:100%;height:100%}</style><script src="https://cdn.jsdelivr.net/npm/@hyperframes/player@latest/dist/hyperframes-player.global.js"><\/script></head><body><script>fetch("/public/catalog/components/hw-arrow.json").then(function(r){return r.json()}).then(function(d){var p=document.createElement("hyperframes-player");p.setAttribute("srcdoc",d.html);p.setAttribute("controls","");p.setAttribute("autoplay","");p.setAttribute("loop","");p.setAttribute("muted","");p.setAttribute("poster","https://static.heygen.ai/hyperframes-oss/docs/images/catalog/components/hw-arrow.png");document.body.appendChild(p)});<\/script></body></html>`}
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/>
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## Install
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<InstallCommand command="npx hyperframes add hw-arrow" item="hw-arrow" />
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That writes `compositions/components/hw-arrow.html`, plus 1 supporting file under `assets/fonts/`.
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## Paste it into your composition
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Open `compositions/components/hw-arrow.html` and copy what is inside into your own composition.
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A component has no size or duration of its own. It takes both from the composition
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you paste it into.
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## Source
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<Accordion title={`hw-arrow.html`}>
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```html
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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
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<style>
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@font-face {
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font-family: "Caveat";
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src: url("assets/fonts/Caveat-700-latin.woff2") format("woff2");
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font-weight: 700;
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font-display: block;
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}
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*,
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*::before,
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*::after {
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margin: 0;
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padding: 0;
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box-sizing: border-box;
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}
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body {
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background: transparent;
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overflow: hidden;
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}
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/* ---- hw-arrow ------------------------------------------------------
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Hand-wobbled draw-on arrow, boiling, with a travel-aligned
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arrival stretch on the head. Position the wrapper, build with a
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CONFIG (arrowStyle / strokeType / boil), wire with a position
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only: hwArrowBuild + hwArrowOn / hwArrowOff. Requires the hw
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family helpers below (hwOnUpdate / hwHash / hwBoil / hwBoilPose /
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springEase / hwStrokeApply / hwDrawOn) in the host script. */
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.hw-arrow {
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position: absolute;
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pointer-events: none;
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}
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.hw-arrow svg {
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width: 100%;
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height: 100%;
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overflow: visible;
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}
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.hw-arrow path {
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fill: none;
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stroke: var(--hw-arrow-color, var(--hw-ink, #f4f2ec));
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stroke-width: var(--hw-arrow-w, 6);
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stroke-linecap: round;
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stroke-linejoin: round;
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}
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.hw-arrow.hw-soft path {
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filter: blur(0.6px);
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}
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/* self-preview scene */
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#hw-ar-scene {
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position: absolute;
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inset: 0;
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background: linear-gradient(135deg, #274060 0%, #123 100%);
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display: flex;
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align-items: center;
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justify-content: center;
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font-family: var(--hw-font-print, "Caveat", cursive);
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font-weight: 700;
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font-size: 80px;
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color: rgba(244, 242, 236, 0.92);
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}
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</style>
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</head>
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<body>
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<!-- Self-preview. WIRING (g09): copy the .hw-arrow CSS, the markup
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pattern (positioned wrapper + empty svg with a viewBox), and the
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helpers into your host. Build with a CONFIG, wire with a position
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only — the helper owns its durations, eases, and seeds:
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hwArrowBuild("#hw-my-arrow", {
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arrowStyle: "swoop", // "straight" | "gentle" | "swoop"
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strokeType: "spray", // "plain" | "soft" | "sharp" | "spray"
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boil: "calm", // "off" | "calm" | "lively"
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});
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hwArrowOn(tl, "#hw-my-arrow", 2.0);
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hwArrowOff(tl, "#hw-my-arrow", 8.0);
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Each built target needs a UNIQUE id — the wobble seed and the
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sharp/spray mask id derive from it (an id-less target
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console.errors and falls back to a shared "hw-arrow" slot).
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Legacy single-path wiring (a <path> in the svg + hwArrowPath)
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keeps working exactly as before:
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document.querySelector("#hw-my-arrow path")
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.setAttribute("d", hwArrowPath(360, 160, "swoop", 3));
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hwArrowOn(tl, "#hw-my-arrow", 2.0);
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hwBoil(tl, "#hw-my-arrow", { frameDrop: 3, seed: 3 });
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hwArrowOff(tl, "#hw-my-arrow", 8.0);
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-->
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<div
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id="hw-ar-root"
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data-composition-id="hw-arrow"
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data-start="0"
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data-duration="4"
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data-width="1920"
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data-height="1080"
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>
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<div id="hw-ar-scene"><span>point at things</span></div>
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<div
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class="hw-arrow"
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id="hw-ar-demo"
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style="left: 560px; top: 320px; width: 380px; height: 180px"
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>
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<svg viewBox="0 0 380 180"></svg>
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</div>
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<div
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id="hw-ar-drv"
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class="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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style="position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none"
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></div>
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</div>
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<script>
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(function () {
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window.__timelines = window.__timelines || {};
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/* ---- hw-boil helpers (shared family runtime — copy once per host) ---- */
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window.hwOnUpdate = function (tl, fn) {
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if (!tl.__hwRenders) {
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tl.__hwRenders = [];
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tl.eventCallback("onUpdate", function () {
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for (var i = 0; i < tl.__hwRenders.length; i++) tl.__hwRenders[i]();
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});
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}
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tl.__hwRenders.push(fn);
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fn();
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};
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window.hwHash = function (n, seed) {
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var x = Math.sin(n * 127.1 + (seed || 1) * 311.7) * 43758.5453;
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return (x - Math.floor(x)) * 2 - 1;
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};
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window.hwBoil = function (tl, target, opts) {
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opts = opts || {};
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var amp = opts.amp !== undefined ? opts.amp : 1.6;
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var rot = opts.rot !== undefined ? opts.rot : 0.5;
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var fps = opts.fps || 30;
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var drop = opts.frameDrop || 3;
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var seed = opts.seed || 1;
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var els = gsap.utils.toArray(target);
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window.hwOnUpdate(tl, function () {
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var step = Math.floor((tl.time() * fps) / drop);
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for (var i = 0; i < els.length; i++) {
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gsap.set(els[i], {
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x: window.hwHash(step * 3 + i * 97, seed) * amp,
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y: window.hwHash(step * 3 + 1 + i * 97, seed) * amp,
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rotation: (opts.baseRot || 0) + window.hwHash(step * 3 + 2 + i * 97, seed) * rot,
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});
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}
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});
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};
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// boil control: authored poses over the family-locked frameDrop.
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// Unknown pose → default + console error (bounded-controls law).
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window.hwBoilPose = function (tl, target, pose, opts) {
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opts = opts || {};
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var poses = { calm: { amp: 1.6, rot: 0.5 }, lively: { amp: 2.6, rot: 0.9 } };
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if (pose === "off") return;
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var p = poses[pose];
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if (!p) {
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console.error('hw: unknown boil pose "' + pose + '" — falling back to "calm"');
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p = poses.calm;
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}
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window.hwBoil(tl, target, { amp: p.amp, rot: p.rot, frameDrop: 3, seed: opts.seed || 1 });
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};
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/* ---- spring library (snappy register; factory duration consumed verbatim) ---- */
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var LN1000 = Math.log(1000);
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var FEELS = {
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snappy: { zeta: 0.9, response: 0.22 },
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};
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window.springEase = function (opts) {
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var f = opts.feel ? FEELS[opts.feel] : opts;
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var zeta = f.zeta,
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response = f.response;
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var w0 = (2 * Math.PI) / response;
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var T = LN1000 / (zeta * w0);
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var x;
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if (zeta < 1) {
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var wd = w0 * Math.sqrt(1 - zeta * zeta);
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x = function (t) {
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return (
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1 -
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Math.exp(-zeta * w0 * t) *
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(Math.cos(wd * t) + ((zeta * w0) / wd) * Math.sin(wd * t))
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);
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};
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} else {
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x = function (t) {
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return 1 - Math.exp(-w0 * t) * (1 + w0 * t);
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};
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}
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var xT = x(T);
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return {
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ease: function (p) {
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return p >= 1 ? 1 : x(p * T) / xT;
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},
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duration: T,
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zeta: zeta,
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response: response,
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};
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};
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/* ---- pen-velocity ease: pure function of the path geometry ----
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Sample 25–75 curvature-adaptive points, speed ∝ 1/(1+k·curvature)
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floored at 0.22 (a pen slows into curves, never stalls), integrate
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ds/speed, invert to a normalized time→distance ease. Seek-safe:
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no per-frame state. */
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window.hwPenEase = function (pathEl, opts) {
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opts = opts || {};
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var kCurve = opts.kCurve !== undefined ? opts.kCurve : 10;
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var L = pathEl.getTotalLength();
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if (L <= 0)
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return {
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ease: function (t) {
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return t;
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},
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samples: 2,
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inkTime: 1,
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len: 0,
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};
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var PRE = 48;
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var pts = [];
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for (var i = 0; i <= PRE; i++) pts.push(pathEl.getPointAtLength((L * i) / PRE));
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var curv = [0];
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for (i = 1; i < PRE; i++) {
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var ax = pts[i].x - pts[i - 1].x,
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ay = pts[i].y - pts[i - 1].y;
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var bx = pts[i + 1].x - pts[i].x,
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by = pts[i + 1].y - pts[i].y;
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var la = Math.hypot(ax, ay) || 1e-6,
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lb = Math.hypot(bx, by) || 1e-6;
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var dot = Math.max(-1, Math.min(1, (ax * bx + ay * by) / (la * lb)));
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curv.push(Math.acos(dot) / ((la + lb) / 2));
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}
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curv.push(0);
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var mass = 0;
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for (i = 0; i < curv.length; i++) mass += curv[i];
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var N = Math.max(25, Math.min(75, Math.round(25 + mass * 18)));
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var seg = L / N;
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var times = [0];
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var t = 0;
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for (i = 1; i <= N; i++) {
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var u = ((i - 0.5) / N) * PRE;
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var i0 = Math.floor(u),
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f = u - i0;
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var c = curv[Math.min(i0, PRE)] * (1 - f) + curv[Math.min(i0 + 1, PRE)] * f;
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var speed = Math.max(1 / (1 + kCurve * c * 14), 0.22);
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t += seg / speed;
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times.push(t);
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}
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var total = times[N];
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for (i = 0; i <= N; i++) times[i] /= total;
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var easeFn = function (p) {
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if (p <= 0) return 0;
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if (p >= 1) return 1;
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var lo = 0,
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hi = N;
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while (hi - lo > 1) {
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var mid = (lo + hi) >> 1;
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if (times[mid] <= p) lo = mid;
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else hi = mid;
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}
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var span = times[hi] - times[lo] || 1e-9;
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return (lo + (p - times[lo]) / span) / N;
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};
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return { ease: easeFn, samples: N, inkTime: total, len: L };
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};
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/* ---- stroke matrix: plain | soft | sharp | spray -------------------
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strokeType is a g09 variant control. Authored constants per type;
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unknown value → default ("plain") + console error (bounded-controls
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law). sharp = micro stroke-dasharray gaps (dry marker) — draw-on
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therefore rides a MASK clone (the visible dasharray never animates).
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spray = index-seeded deterministic dots along the path via hwHash;
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NO feTurbulence anywhere.
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Returns { draw: pathToDashAnimate, group: maskedGroupOrNull } */
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window.hwStrokeTypes = {
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plain: {},
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soft: { blur: 0.6 },
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sharp: { dash: [3.0, 1.55] }, // × stroke-width
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spray: {
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coreOpacity: 0.5,
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coreBlur: 0.4,
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density: 0.16,
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scatter: 2.6,
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rMin: 1.1,
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rMax: 2.6,
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},
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};
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window.hwStrokeApply = function (pathEl, type, opts) {
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opts = opts || {};
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var cfg = window.hwStrokeTypes[type];
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if (!cfg) {
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console.error('hw: unknown strokeType "' + type + '" — falling back to "plain"');
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type = "plain";
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cfg = window.hwStrokeTypes.plain;
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}
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var svg = pathEl.ownerSVGElement;
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var ns = "http://www.w3.org/2000/svg";
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var w = parseFloat(getComputedStyle(pathEl).strokeWidth) || 6;
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if (type === "plain") return { draw: pathEl, group: null, type: type };
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if (type === "soft") {
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pathEl.style.filter = "blur(" + cfg.blur + "px)";
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return { draw: pathEl, group: null, type: type };
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}
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// sharp + spray: wrap in a masked group, draw-on animates the mask clone
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var id =
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opts.id ||
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"hwsm-" + Math.abs(Math.round(window.hwHash((opts.seed || 1) * 13.7, 5) * 1e6));
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var defs = svg.querySelector("defs");
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if (!defs) {
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defs = document.createElementNS(ns, "defs");
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svg.insertBefore(defs, svg.firstChild);
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}
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var mask = document.createElementNS(ns, "mask");
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mask.setAttribute("id", id);
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mask.setAttribute("maskUnits", "userSpaceOnUse");
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var clone = document.createElementNS(ns, "path");
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clone.setAttribute("d", pathEl.getAttribute("d"));
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clone.setAttribute("fill", "none");
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clone.setAttribute("stroke", "#fff");
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clone.setAttribute(
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"stroke-width",
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w * (type === "spray" ? 2 + (cfg.scatter * 2) / w : 1.7),
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);
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clone.setAttribute("stroke-linecap", "round");
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clone.setAttribute("stroke-linejoin", "round");
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mask.appendChild(clone);
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defs.appendChild(mask);
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var group = document.createElementNS(ns, "g");
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group.setAttribute("mask", "url(#" + id + ")");
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pathEl.parentNode.insertBefore(group, pathEl);
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group.appendChild(pathEl);
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if (type === "sharp") {
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pathEl.setAttribute(
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"stroke-dasharray",
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(cfg.dash[0] * w).toFixed(1) + " " + (cfg.dash[1] * w).toFixed(1),
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);
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} else {
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// spray: faint core + seeded dots
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pathEl.setAttribute("stroke-opacity", cfg.coreOpacity);
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pathEl.style.filter = "blur(" + cfg.coreBlur + "px)";
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var len = pathEl.getTotalLength();
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var n = Math.round(len * cfg.density * (opts.densityScale || 1));
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var seed = opts.seed || 1;
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var dots = document.createElementNS(ns, "g");
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for (var i = 0; i < n; i++) {
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var t = Math.min(
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1,
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Math.max(0, (i + 0.5) / n + (window.hwHash(i * 7, seed) * 0.35) / n),
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);
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var pt = pathEl.getPointAtLength(t * len);
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var pt2 = pathEl.getPointAtLength(Math.min(len, t * len + 0.5));
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var tx = pt2.x - pt.x,
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ty = pt2.y - pt.y;
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var tl2 = Math.hypot(tx, ty) || 1;
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var nx = -ty / tl2,
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nyv = tx / tl2;
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var off = window.hwHash(i * 7 + 1, seed) * (cfg.scatter + w * 0.55);
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var r = cfg.rMin + Math.abs(window.hwHash(i * 7 + 2, seed)) * (cfg.rMax - cfg.rMin);
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var c = document.createElementNS(ns, "circle");
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c.setAttribute("cx", (pt.x + nx * off).toFixed(1));
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c.setAttribute("cy", (pt.y + nyv * off).toFixed(1));
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c.setAttribute("r", r.toFixed(2));
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c.setAttribute("fill", getComputedStyle(pathEl).stroke);
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dots.appendChild(c);
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}
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group.appendChild(dots);
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}
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return { draw: clone, group: group, type: type };
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};
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/* Draw-on across the stroke matrix: dash-animate whatever hwStrokeApply
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says. The draw target is always solid (plain/soft: the path itself;
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sharp/spray: the mask clone — the visible path keeps its texture
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dasharray untouched). Optionally pen-velocity eased (opts.pen). */
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window.hwDrawOn = function (tl, applied, at, dur, opts) {
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opts = opts || {};
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var p = applied.draw;
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var len = p.getTotalLength();
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// the draw target is always solid (plain/soft: the path itself; sharp/spray:
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// the mask clone — the visible path keeps its texture dasharray untouched)
|
||
p.setAttribute("stroke-dasharray", len + " " + len);
|
||
p.setAttribute("stroke-dashoffset", len);
|
||
gsap.set(p, { opacity: 0 }); // kill the round-cap start nub pre-draw
|
||
var ease = opts.pen ? window.hwPenEase(p, opts).ease : opts.ease || "power2.inOut";
|
||
tl.set(p, { opacity: 1 }, at);
|
||
tl.to(
|
||
p,
|
||
{ strokeDashoffset: 0, duration: dur === undefined ? 0.7 : dur, ease: ease },
|
||
at,
|
||
);
|
||
};
|
||
|
||
// ---- hw-arrow helpers (copy these too) ----
|
||
// Wobbled arrow path in a w x h box, tail at left, head at right.
|
||
// curve: "straight" | "gentle" | "swoop"
|
||
window.hwArrowPath = function (w, h, curve, seed) {
|
||
seed = seed || 1;
|
||
var bend = curve === "swoop" ? 0.55 : curve === "gentle" ? 0.28 : 0.06;
|
||
function wob(v, n, range) {
|
||
return v + window.hwHash(n, seed) * range;
|
||
}
|
||
var x0 = wob(4, 1, 3),
|
||
y0 = wob(h * 0.72, 2, 4),
|
||
x1 = wob(w - 10, 3, 4),
|
||
y1 = wob(h * 0.3, 4, 4);
|
||
var cx1 = wob(w * 0.35, 5, 10),
|
||
cy1 = wob(h * (0.72 + bend * 0.5), 6, 8);
|
||
var cx2 = wob(w * 0.7, 7, 10),
|
||
cy2 = wob(h * (0.3 + bend), 8, 8);
|
||
var ang = Math.atan2(y1 - cy2, x1 - cx2);
|
||
function head(da, len) {
|
||
var a = ang + Math.PI + da;
|
||
return (
|
||
"M " +
|
||
x1.toFixed(1) +
|
||
" " +
|
||
y1.toFixed(1) +
|
||
" l " +
|
||
(Math.cos(a) * len).toFixed(1) +
|
||
" " +
|
||
(Math.sin(a) * len).toFixed(1)
|
||
);
|
||
}
|
||
return (
|
||
"M " +
|
||
x0.toFixed(1) +
|
||
" " +
|
||
y0.toFixed(1) +
|
||
" C " +
|
||
cx1.toFixed(1) +
|
||
" " +
|
||
cy1.toFixed(1) +
|
||
", " +
|
||
cx2.toFixed(1) +
|
||
" " +
|
||
cy2.toFixed(1) +
|
||
", " +
|
||
x1.toFixed(1) +
|
||
" " +
|
||
y1.toFixed(1) +
|
||
" " +
|
||
head(0.5, wob(34, 9, 6)) +
|
||
" " +
|
||
head(-0.5, wob(34, 10, 6))
|
||
);
|
||
};
|
||
|
||
// ---- hwArrowBuild: CONFIG-reading component builder (g09) ----
|
||
// Builds the arrow as TWO paths (curve + head group) inside the
|
||
// target's svg with the same wobble math and seed slots as
|
||
// hwArrowPath, applies CONFIG.strokeType to the curve (the head
|
||
// stays plain — texture on a ~30px head reads as noise), and rigs
|
||
// the travel-aligned arrival wrapper: an outer g rotated to the
|
||
// travel direction + an inner g counter-rotated. The pair cancels,
|
||
// so geometry stays put while scaleX on the outer acts along
|
||
// travel. NO transform-box styles on these g's — they fight GSAP's
|
||
// baked SVG origins (the outer's fill-box would derive from its
|
||
// rotated child and the cancellation breaks).
|
||
// `seed` is internal — defaults per target from the element id
|
||
// (a pure hash of the id string: deterministic across page loads);
|
||
// it is NOT a control. Targets must carry unique ids: id-less
|
||
// targets fall back to a shared "hw-arrow" slot (identical wobble;
|
||
// duplicate mask ids cross-wire sharp/spray reveals), so that case
|
||
// fails loudly (bounded-controls law).
|
||
window.hwArrowBuild = function (target, CONFIG, seed) {
|
||
CONFIG = CONFIG || {};
|
||
var el = typeof target === "string" ? document.querySelector(target) : target;
|
||
var svg = el.querySelector("svg");
|
||
if (!el.id)
|
||
console.error(
|
||
'hw: hwArrowBuild target has no id — falling back to the shared "hw-arrow" seed/mask slot; give each built target a unique id',
|
||
);
|
||
if (seed === undefined) {
|
||
var idStr = el.id || "hw-arrow";
|
||
seed = 0;
|
||
for (var si = 0; si < idStr.length; si++)
|
||
seed = (seed * 31 + idStr.charCodeAt(si)) % 997;
|
||
seed = (seed % 96) + 1;
|
||
}
|
||
var style = CONFIG.arrowStyle === undefined ? "gentle" : CONFIG.arrowStyle;
|
||
if (style !== "straight" && style !== "gentle" && style !== "swoop") {
|
||
console.error('hw: unknown arrowStyle "' + style + '" — falling back to "gentle"');
|
||
style = "gentle";
|
||
}
|
||
var vb = svg.viewBox.baseVal;
|
||
var w = vb && vb.width ? vb.width : el.clientWidth;
|
||
var h = vb && vb.height ? vb.height : el.clientHeight;
|
||
// same wobble math + hash slots as hwArrowPath (1–8 body, 9/10 head)
|
||
var bend = style === "swoop" ? 0.55 : style === "gentle" ? 0.28 : 0.06;
|
||
function wob(v, n, range) {
|
||
return v + window.hwHash(n, seed) * range;
|
||
}
|
||
var x0 = wob(4, 1, 3),
|
||
y0 = wob(h * 0.72, 2, 4),
|
||
x1 = wob(w - 10, 3, 4),
|
||
y1 = wob(h * 0.3, 4, 4);
|
||
var cx1 = wob(w * 0.35, 5, 10),
|
||
cy1 = wob(h * (0.72 + bend * 0.5), 6, 8);
|
||
var cx2 = wob(w * 0.7, 7, 10),
|
||
cy2 = wob(h * (0.3 + bend), 8, 8);
|
||
var ang = Math.atan2(y1 - cy2, x1 - cx2);
|
||
function headSeg(da, len) {
|
||
var a = ang + Math.PI + da;
|
||
return (
|
||
"M " +
|
||
x1.toFixed(1) +
|
||
" " +
|
||
y1.toFixed(1) +
|
||
" l " +
|
||
(Math.cos(a) * len).toFixed(1) +
|
||
" " +
|
||
(Math.sin(a) * len).toFixed(1)
|
||
);
|
||
}
|
||
var ns = "http://www.w3.org/2000/svg";
|
||
var curve = document.createElementNS(ns, "path");
|
||
curve.setAttribute(
|
||
"d",
|
||
"M " +
|
||
x0.toFixed(1) +
|
||
" " +
|
||
y0.toFixed(1) +
|
||
" C " +
|
||
cx1.toFixed(1) +
|
||
" " +
|
||
cy1.toFixed(1) +
|
||
", " +
|
||
cx2.toFixed(1) +
|
||
" " +
|
||
cy2.toFixed(1) +
|
||
", " +
|
||
x1.toFixed(1) +
|
||
" " +
|
||
y1.toFixed(1),
|
||
);
|
||
svg.appendChild(curve);
|
||
var headG = document.createElementNS(ns, "g");
|
||
var headInner = document.createElementNS(ns, "g");
|
||
var head = document.createElementNS(ns, "path");
|
||
head.setAttribute("d", headSeg(0.5, wob(34, 9, 6)) + " " + headSeg(-0.5, wob(34, 10, 6)));
|
||
headInner.appendChild(head);
|
||
headG.appendChild(headInner);
|
||
svg.appendChild(headG);
|
||
// curve texture; mask id derived from the element id — deterministic
|
||
// and collision-free across id-bearing instances (id-less targets
|
||
// errored above and share the fallback)
|
||
var applied = window.hwStrokeApply(
|
||
curve,
|
||
CONFIG.strokeType === undefined ? "plain" : CONFIG.strokeType,
|
||
{ seed: seed, id: (el.id || "hw-arrow") + "-sm" },
|
||
);
|
||
if (applied.group) {
|
||
// the item CSS (.hw-arrow path) outranks the mask clone's
|
||
// presentation attributes — pin them as inline styles so the
|
||
// reveal mask keeps its authored width and white stroke
|
||
applied.draw.style.stroke = "#fff";
|
||
applied.draw.style.strokeWidth = applied.draw.getAttribute("stroke-width");
|
||
}
|
||
// arrival rig: rotate the WRAPPER to travel, counter-rotate the
|
||
// content — wrapper scaleX then acts along travel
|
||
var angDeg = (ang * 180) / Math.PI;
|
||
gsap.set(headG, { transformOrigin: "50% 50%", rotation: angDeg, opacity: 0 });
|
||
gsap.set(headInner, { transformOrigin: "50% 50%", rotation: -angDeg });
|
||
el.__hwArrowBuild = {
|
||
el: el,
|
||
applied: applied,
|
||
headG: headG,
|
||
headInner: headInner,
|
||
seed: seed,
|
||
boil: CONFIG.boil === undefined ? "calm" : CONFIG.boil,
|
||
boiled: false,
|
||
};
|
||
return el.__hwArrowBuild;
|
||
};
|
||
|
||
// Draw-on. Built targets (hwArrowBuild): accelerating draw (causal
|
||
// arrival), then the head pops with the g21 travel-aligned stretch —
|
||
// v measured numerically from the draw ease end-slope, S = min(0.06
|
||
// × v/2000, 0.25), volume preserved (scaleX × scaleY ≈ 1, asserted),
|
||
// 2-frame apply + snappy spring recovery (factory duration verbatim).
|
||
// Legacy single-path targets keep the shipped dashoffset behavior.
|
||
window.hwArrowOn = function (tl, target, at, dur) {
|
||
var el = typeof target === "string" ? document.querySelector(target) : target;
|
||
var b = el && el.__hwArrowBuild;
|
||
if (!b) {
|
||
var p = document.querySelector(target + " path");
|
||
var len = p.getTotalLength();
|
||
gsap.set(p, { strokeDasharray: len, strokeDashoffset: len });
|
||
tl.to(
|
||
p,
|
||
{
|
||
strokeDashoffset: 0,
|
||
duration: dur === undefined ? 0.7 : dur,
|
||
ease: "power2.inOut",
|
||
},
|
||
at,
|
||
);
|
||
return;
|
||
}
|
||
// built targets (g09): durations are item-locked — a
|
||
// legacy-signature `dur` is ignored + console.error (edit the item
|
||
// source to change); the legacy branch above keeps honoring it
|
||
if (dur !== undefined)
|
||
console.error(
|
||
"hw: hwArrowOn draw duration is locked for built targets — ignoring dur=" + dur,
|
||
);
|
||
dur = 0.7;
|
||
// the pen ACCELERATES into the head (power2.in) so the measured
|
||
// arrival velocity is real — a settling ease ends at ~zero slope
|
||
// and would make the stretch invisible
|
||
var drawEase = gsap.parseEase("power2.in");
|
||
window.hwDrawOn(tl, b.applied, at, dur, { ease: drawEase });
|
||
var dlen = b.applied.draw.getTotalLength();
|
||
var eps = 1e-4;
|
||
var v = ((drawEase(1) - drawEase(1 - eps)) / eps) * (dlen / dur);
|
||
var S = Math.min(0.06 * (v / 2000), 0.25);
|
||
var rec = window.springEase({ feel: "snappy" });
|
||
var FPS = 30;
|
||
var st = { s: 0 };
|
||
var hg = b.headG;
|
||
window.hwOnUpdate(tl, function () {
|
||
// stretch ALONG travel (the wrapper's local x after rotation)
|
||
var along = 1 + st.s;
|
||
gsap.set(hg, { scaleX: along, scaleY: 1 / along });
|
||
var ax = parseFloat(gsap.getProperty(hg, "scaleX"));
|
||
var ay = parseFloat(gsap.getProperty(hg, "scaleY"));
|
||
if (Math.abs(ax * ay - 1) > 0.01)
|
||
console.error("hw volume law violated (arrowhead): " + (ax * ay).toFixed(4));
|
||
});
|
||
tl.set(hg, { opacity: 1 }, at + dur);
|
||
tl.to(st, { s: S, duration: 2 / FPS, ease: "power3.out" }, at + dur);
|
||
tl.to(st, { s: 0, duration: rec.duration, ease: rec.ease }, at + dur + 3 / FPS);
|
||
// boil pose (recorded from CONFIG at build; hwBoil needs the
|
||
// timeline, so it registers on first wiring). Boil owns x/y/rotation
|
||
// of the WRAPPER element — the arrival stretch lives on the nested
|
||
// head rig, never on the boiled element.
|
||
if (!b.boiled) {
|
||
b.boiled = true;
|
||
window.hwBoilPose(tl, el, b.boil, { seed: b.seed });
|
||
}
|
||
};
|
||
window.hwArrowOff = function (tl, target, at) {
|
||
tl.to(target, { opacity: 0, duration: 0.3, ease: "power2.in" }, at);
|
||
};
|
||
|
||
// ---- self-preview ----
|
||
var CONFIG = {
|
||
// ── Controls (family base + 2 item-specific; comment grammar is the published-parameter list) ──
|
||
arrowStyle: "gentle", // variant: "straight" | "gentle" | "swoop" — curve bend pose over the seeded wobble math (bend + both control points)
|
||
strokeType: "plain", // variant: "plain" | "soft" | "sharp" | "spray" — curve texture via hwStrokeApply (sharp/spray draw on a mask clone); head stays plain
|
||
boil: "calm", // variant: "off" | "calm" | "lively" — authored amp/rot pairs over the family-locked frameDrop 3; seed locked
|
||
|
||
// ── Locked (edit the item source to change) ─────────────────────
|
||
// seed (derived per target), draw ease (power2.in), arrival
|
||
// softness 0.06, snappy spring recovery, durations
|
||
};
|
||
var tl = gsap.timeline({ paused: true });
|
||
window.hwArrowBuild("#hw-ar-demo", CONFIG);
|
||
window.hwArrowOn(tl, "#hw-ar-demo", 0.4);
|
||
window.hwArrowOff(tl, "#hw-ar-demo", 3.4);
|
||
tl.set("#hw-ar-root", { visibility: "hidden" }, 3.98);
|
||
window.__timelines["hw-arrow"] = tl;
|
||
})();
|
||
</script>
|
||
</body>
|
||
</html>
|
||
```
|
||
|
||
</Accordion>
|
||
|
||
{/* hf:generated-footer */}
|
||
|
||
Tagged `handwritten` `annotation` `arrow` `overlay`.
|
||
|
||
## Related topics
|
||
|
||
- [Browse the complete Catalog](/catalog)
|
||
- [Add assets and Catalog items in Studio](/studio/assets-and-blocks)
|
||
- [Build a richer composition](/go-further)
|