Add motion-design skills from iart-ai/motion-design-skills
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_013TAaJBzbmePTECuv62BXYX
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# Logo Animation Patterns — Cookbook
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Self-contained, runnable recipes for every logo technique. Pick ONE per logo.
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## Timing guidance
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| Beat | Duration | Easing |
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|---|---|---|
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| Stroke draw-on (per path) | 0.6–1.2s | `cubic-bezier(.65,0,.35,1)` (easeInOutCubic) |
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| Mask wipe reveal | 0.5–0.9s | `cubic-bezier(.22,1,.36,1)` (easeOutQuint) |
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| Build-on per piece | 0.4–0.6s, stagger 0.06–0.10s | `back.out(1.5)` |
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| Morph | 0.6–1.0s | `power2.inOut` |
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| Final settle / overshoot | 0.12–0.20s | scale 1.04→1.00, `power2.out` |
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| Full reveal envelope | 0.8–2.5s total | — |
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| Idle loop cycle | 1.5–4s, infinite | `sine.inOut` / `linear` for spin |
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Rule of thumb: longer marks (wordmarks, detailed monograms) sit near 2.0–2.5s; simple icons near 0.8–1.4s. Hold the settled mark at least 0.4s before any sign-off cut.
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## Brand clearspace & geometry rules
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- **Clearspace**: keep a margin equal to the mark's cap-height (or the brand's defined unit) clear of moving particles, wipes, or overshoot. Motion must not visually crop into the safe margin.
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- **No distortion**: scale uniformly, fade, translate, rotate-on-axis, and mask are safe. Avoid non-uniform `scaleX≠scaleY`, skew, and squash on the final mark — they read as off-brand. A squash-and-settle is acceptable ONLY as a sub-0.2s micro-overshoot that returns to 1.0.
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- **Color**: never animate brand color away from spec mid-reveal. Reveal in brand color, or grayscale→brand as an intentional, approved beat.
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- **Lockup integrity**: animate the symbol and wordmark with a clear hierarchy (symbol leads, wordmark follows) but land both in the exact locked relationship.
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## 1. Stroke draw-on (SVG + CSS)
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```html
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<svg viewBox="0 0 240 80" id="mark">
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<path class="ink" pathLength="1" fill="none" stroke="#0A84FF"
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stroke-width="7" stroke-linecap="round" stroke-linejoin="round"
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d="M12 64 L48 16 L84 64 M120 16 L120 64 M156 16 H204"/>
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</svg>
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<style>
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#mark .ink {
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stroke-dasharray: 1; stroke-dashoffset: 1;
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animation: draw 1.1s cubic-bezier(.65,0,.35,1) forwards;
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}
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@keyframes draw { to { stroke-dashoffset: 0; } }
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@media (prefers-reduced-motion: reduce){
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#mark .ink { animation: none; stroke-dashoffset: 0; }
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}
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</style>
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```
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Draw-then-fill (line settles into a solid mark):
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```css
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#mark .ink { fill: transparent; }
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@keyframes fill { to { fill: #0A84FF; stroke-width: 0; } }
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#mark .ink { animation: draw 1.1s cubic-bezier(.65,0,.35,1) forwards,
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fill .3s ease .9s forwards; }
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```
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GSAP equivalent with per-path stagger via DrawSVGPlugin:
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```js
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import gsap from "gsap";
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import { DrawSVGPlugin } from "gsap/DrawSVGPlugin";
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gsap.registerPlugin(DrawSVGPlugin);
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gsap.fromTo("#mark .ink",
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{ drawSVG: "0%" },
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{ drawSVG: "100%", duration: 1.0, ease: "power2.inOut", stagger: 0.15 });
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```
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## 2. Mask wipe / build-on (clipPath)
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Reveal a filled mark by sweeping a clip rect across it.
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```html
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<svg viewBox="0 0 200 80">
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<defs>
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<clipPath id="wipe"><rect id="wiper" x="0" y="0" width="0" height="80"/></clipPath>
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</defs>
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<g clip-path="url(#wipe)">
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<!-- the full filled logo art here -->
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<path d="M10 10 H190 V70 H10 Z" fill="#111"/>
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</g>
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</svg>
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<style>
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#wiper { animation: wipe .8s cubic-bezier(.22,1,.36,1) forwards; }
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@keyframes wipe { to { width: 200px; } }
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@media (prefers-reduced-motion: reduce){ #wiper{ animation:none; width:200px; } }
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</style>
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```
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Directional variants: animate `y`/`height` for a top-down build, or use a radial `<clipPath>` with a growing `<circle r>` for an iris reveal.
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## 3. Build-on with stagger (GSAP timeline)
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```js
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import gsap from "gsap";
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const tl = gsap.timeline({ defaults: { ease: "back.out(1.6)" } });
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tl.from("#base", { scale: .8, opacity: 0, transformOrigin: "50% 50%", duration: .5 })
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.from(".accent", { scale: .7, opacity: 0, transformOrigin: "50% 50%",
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duration: .45, stagger: 0.08 }, "-=0.2")
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.from(".word > *", { yPercent: 120, opacity: 0, duration: .4,
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stagger: 0.04, ease: "power3.out" }, "-=0.15")
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.to("#mark", { scale: 1.04, duration: .12, ease: "power2.out" })
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.to("#mark", { scale: 1.0, duration: .14, ease: "power2.inOut" });
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```
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## 4. Morph (GSAP MorphSVG)
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Morph requires two paths; MorphSVG handles differing point counts.
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```js
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import gsap from "gsap";
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import { MorphSVGPlugin } from "gsap/MorphSVGPlugin";
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gsap.registerPlugin(MorphSVGPlugin);
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// #shape: a simple start shape (e.g. circle path) -> #logoPath: the brand mark
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gsap.to("#shape", {
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duration: .9, ease: "power2.inOut",
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morphSVG: { shape: "#logoPath", shapeIndex: "auto" }
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});
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```
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No-plugin fallback (Flubber for interpolation + requestAnimationFrame):
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```js
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import { interpolate } from "flubber";
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const from = "M10,10 ...", to = "M0,0 ...";
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const lerp = interpolate(from, to, { maxSegmentLength: 2 });
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const path = document.querySelector("#shape");
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const dur = 900, t0 = performance.now();
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(function frame(now){
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const k = Math.min(1, (now - t0) / dur);
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const e = k < .5 ? 2*k*k : 1 - Math.pow(-2*k+2, 2)/2; // easeInOutQuad
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path.setAttribute("d", lerp(e));
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if (k < 1) requestAnimationFrame(frame);
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})(t0);
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```
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## 5. Seamless idle loop (loader)
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Loop must have identical start and end frames — design the cycle so frame 0 == frame N.
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```css
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#loader { animation: spin 1.4s linear infinite, pulse 2.8s ease-in-out infinite; }
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@keyframes spin { to { transform: rotate(360deg); } }
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@keyframes pulse { 0%,100%{ opacity:.85 } 50%{ opacity:1 } }
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@media (prefers-reduced-motion: reduce){
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#loader { animation: pulse 2.8s ease-in-out infinite; } /* drop rotation */
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}
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```
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GSAP `yoyo` loop for a breathing mark:
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```js
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gsap.to("#mark", { scale: 1.03, duration: 1.4, ease: "sine.inOut",
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yoyo: true, repeat: -1 });
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```
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## 6. Lottie delivery (designer-made)
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Export from After Effects via Bodymovin to `.json`, or compressed `.lottie`.
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```html
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<canvas id="logo-canvas" width="512" height="512"></canvas>
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<script type="module">
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import { DotLottie } from "https://cdn.jsdelivr.net/npm/@lottiefiles/dotlottie-web/+esm";
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const reduce = matchMedia("(prefers-reduced-motion: reduce)").matches;
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const dl = new DotLottie({
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canvas: document.querySelector("#logo-canvas"),
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src: "/logo.lottie", autoplay: !reduce, loop: false, speed: 1,
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});
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// Reduced motion: jump to the final settled frame, no playback.
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if (reduce) dl.addEventListener("load", () => dl.setFrame(dl.totalFrames - 1));
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// Sound-logo sync: fire audio when the settle frame is reached.
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dl.addEventListener("frame", ({ currentFrame }) => {
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if (currentFrame >= SETTLE_FRAME && !audioFired) { audio.play(); audioFired = true; }
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});
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</script>
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```
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Classic `lottie-web` (SVG renderer, sharpest for vector logos):
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```js
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import lottie from "lottie-web";
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const anim = lottie.loadAnimation({
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container: document.getElementById("logo"),
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renderer: "svg", loop: false, autoplay: !reduce, path: "/logo.json",
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});
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if (reduce) anim.goToAndStop(anim.totalFrames - 1, true);
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```
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Lottie tips: keep layers/effects Bodymovin-supported (no native blurs/expressions unless baked), name layers cleanly, and request a poster PNG of the final frame from the designer for the static fallback.
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## 7. Reduced-motion fallback (always ship)
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Every delivery must degrade to the static, fully-revealed mark:
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- **CSS/SVG**: `@media (prefers-reduced-motion: reduce)` sets the final state (`stroke-dashoffset:0`, `width:full`, `opacity:1`) with `animation:none`.
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- **Lottie**: `goToAndStop(totalFrames-1)` / `setFrame(last)`.
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- **Video**: serve a poster image of the last frame; only autoplay motion when motion is allowed.
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- **JS gate**: branch on `matchMedia("(prefers-reduced-motion: reduce)").matches` before building any timeline.
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---
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Match the reveal to the delivery target and a logo lands across web, video, and app. Built by **[iart.ai](https://iart.ai/?utm_source=github&utm_medium=readme&utm_campaign=motion-design-skills&utm_content=skill_footer&utm_term=logo-animation)** — the AI motion agent for editable, on-brand motion graphics.
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