Install
That writescompositions/components/hw-callout-circle.html, plus 1 supporting file under assets/fonts/.
Paste it into your composition
Opencompositions/components/hw-callout-circle.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.
Source
hw-callout-circle.html
hw-callout-circle.html
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
<style>
@font-face {
font-family: "Caveat";
src: url("assets/fonts/Caveat-700-latin.woff2") format("woff2");
font-weight: 700;
font-display: block;
}
*,
*::before,
*::after {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
background: transparent;
overflow: hidden;
}
/* ---- hw-callout-circle ----------------------------------------------
The full callout anatomy: wobbled ellipse outline draws around a
target, optional scribble fill sketches in, a curved connector leads
to a handwritten label that POPS in with momentum — the drawn shapes
absorb the arrival with a volume-preserving contact squash (g21).
Ships the full family runtime it needs (hw-boil + boil poses +
stroke matrix + springEase) — copy the helpers once per host.
WRAPPER RULES: boil owns x/y/rotation of .hw-co-boil; the squash
deforms .hw-co-deform (outline + scribble only); the label rides
the uniform-scale .hw-co-pop OUTSIDE the deform — non-uniform
scale never reaches glyphs. One timeline has ONE onUpdate
(everything registers through hwOnUpdate). */
.hw-callout {
position: absolute;
pointer-events: none;
}
.hw-callout .hw-co-boil,
.hw-callout .hw-co-deform,
.hw-callout .hw-co-conn-layer,
.hw-callout .hw-co-pop {
position: absolute;
inset: 0;
}
.hw-callout .hw-co-pop {
opacity: 0;
}
.hw-callout svg {
width: 100%;
height: 100%;
overflow: visible;
}
.hw-callout path {
fill: none;
stroke-linecap: round;
stroke-linejoin: round;
}
.hw-callout .hw-co-outline {
stroke: var(--hw-co-ink, var(--hw-ink, #f4f2ec));
stroke-width: var(--hw-co-w, 6);
}
.hw-callout .hw-co-scribble {
/* Warm marker accent to match hw-frame / hw-title / hw-underline; the
previous blue read as a default UI colour. Lighter weight and alpha
so the hatch sits behind the labelled subject instead of over it. */
stroke: var(--hw-co-accent, var(--hw-accent, #ffb020));
stroke-width: 3;
opacity: 0.42;
}
.hw-callout .hw-co-connector {
stroke: var(--hw-co-ink, var(--hw-ink, #f4f2ec));
stroke-width: 4;
}
.hw-callout .hw-co-label {
position: absolute;
font-family: var(--hw-font-print, "Caveat", cursive);
font-weight: 700;
font-size: 54px;
color: var(--hw-co-ink, var(--hw-ink, #f4f2ec));
white-space: nowrap;
text-shadow: 0 2px 14px rgba(0, 0, 0, 0.45);
}
/* self-preview scene */
#hw-co-scene {
position: absolute;
inset: 0;
background: linear-gradient(150deg, #35604a 0%, #14231c 100%);
}
#hw-co-target {
position: absolute;
left: 700px;
top: 420px;
width: 220px;
height: 150px;
border-radius: 18px;
background: rgba(244, 242, 236, 0.18);
display: flex;
align-items: center;
justify-content: center;
font-family: "Inter", ui-sans-serif, sans-serif;
font-weight: 600;
font-size: 30px;
color: rgba(244, 242, 236, 0.8);
}
</style>
</head>
<body>
<!-- Self-preview. WIRING: copy the .hw-callout CSS + markup pattern (the
boil / deform / conn-layer / pop wrapper stack is REQUIRED — boil
owns x/y/rotation, the squash owns the deform, the label pops on
.hw-co-pop) and ALL helpers below. Size the wrapper around your
target, then:
hwCalloutBuild("#hw-my-callout", { scribble: true, seed: 4,
label: "look here!", labelAt: "right",
strokeType: "plain", boil: "calm" });
hwCalloutOn(tl, "#hw-my-callout", 2.0);
hwCalloutOff(tl, "#hw-my-callout", 8.0);
hwCalloutOn applies the boil pose internally — do NOT add a host
hwBoil call on the callout (it would double-boil).
-->
<div
id="hw-co-root"
data-composition-id="hw-callout-circle"
data-start="0"
data-duration="4"
data-width="1920"
data-height="1080"
>
<div id="hw-co-scene"></div>
<div id="hw-co-target">subject</div>
<div
class="hw-callout"
id="hw-co-demo"
style="left: 640px; top: 370px; width: 340px; height: 250px"
>
<div class="hw-co-boil">
<div class="hw-co-deform">
<svg viewBox="0 0 340 250">
<path class="hw-co-scribble" id="hw-co-demo-scribble"></path>
<path class="hw-co-outline" id="hw-co-demo-outline"></path>
</svg>
</div>
<svg class="hw-co-conn-layer" viewBox="0 0 340 250">
<path class="hw-co-connector" id="hw-co-demo-connector"></path>
</svg>
<div class="hw-co-pop">
<!-- labels intentionally hang outside the wrapper box -->
<div class="hw-co-label" id="hw-co-demo-label" data-layout-allow-overflow></div>
</div>
</div>
</div>
<div
id="hw-co-drv"
class="clip"
data-start="0"
data-duration="4"
data-track-index="0"
style="position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none"
></div>
</div>
<script>
(function () {
window.__timelines = window.__timelines || {};
var CONFIG = {
// ── Content (freely editable — not counted) ─────────────────────
label: "look here!",
scribble: true, // which anatomy pieces exist (content, not a feel lever)
connector: true, // (connector: false also suppresses the label anchor)
// ── Controls (family base + 2 item-specific; comment grammar is the published-parameter list) ──
labelAt: "right", // variant: "left" | "right" | "below" — connector start point, sweep direction + label anchor pose (6 geometry params)
strokeType: "plain", // variant: "plain" | "soft" | "sharp" | "spray" — outline + connector stroke texture (authored constants per type); the scribble fill stays plain — texture-on-texture reads as mud
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) ─────────────────────
// draw durations/eases, pop ease + contact-squash constants
// (softness 0.08 light-drawn-line tier, snappy recovery),
// stroke-type constants, boil pose tables, seeds
};
var SEED = 4; // locked — determinism (hosts pass a distinct seed per callout instance)
/* ---- hw-boil helpers (shared family runtime — copy once per host) ---- */
window.hwOnUpdate = function (tl, fn) {
if (!tl.__hwRenders) {
tl.__hwRenders = [];
tl.eventCallback("onUpdate", function () {
for (var i = 0; i < tl.__hwRenders.length; i++) tl.__hwRenders[i]();
});
}
tl.__hwRenders.push(fn);
fn();
};
window.hwHash = function (n, seed) {
var x = Math.sin(n * 127.1 + (seed || 1) * 311.7) * 43758.5453;
return (x - Math.floor(x)) * 2 - 1;
};
window.hwBoil = function (tl, target, opts) {
opts = opts || {};
var amp = opts.amp !== undefined ? opts.amp : 1.6;
var rot = opts.rot !== undefined ? opts.rot : 0.5;
var fps = opts.fps || 30;
var drop = opts.frameDrop || 3;
var seed = opts.seed || 1;
var els = gsap.utils.toArray(target);
window.hwOnUpdate(tl, function () {
var step = Math.floor((tl.time() * fps) / drop);
for (var i = 0; i < els.length; i++) {
gsap.set(els[i], {
x: window.hwHash(step * 3 + i * 97, seed) * amp,
y: window.hwHash(step * 3 + 1 + i * 97, seed) * amp,
rotation: (opts.baseRot || 0) + window.hwHash(step * 3 + 2 + i * 97, seed) * rot,
});
}
});
};
// boil control: authored poses over the family-locked frameDrop.
// Unknown pose → default + console error (bounded-controls law).
window.hwBoilPose = function (tl, target, pose, opts) {
opts = opts || {};
var poses = { calm: { amp: 1.6, rot: 0.5 }, lively: { amp: 2.6, rot: 0.9 } };
if (pose === "off") return;
var p = poses[pose];
if (!p) {
console.error('hw: unknown boil pose "' + pose + '" — falling back to "calm"');
p = poses.calm;
}
window.hwBoil(tl, target, { amp: p.amp, rot: p.rot, frameDrop: 3, seed: opts.seed || 1 });
};
/* ---- spring library (spring-lab, validated 2026-08-04 — verbatim) ---- */
var LN1000 = Math.log(1000);
var FEELS = {
snappy: { zeta: 0.9, response: 0.22 },
"heavy-settle": { zeta: 1.0, response: 0.8 },
bouncy: { zeta: 0.5, response: 0.4 },
wobbly: { zeta: 0.28, response: 0.5 },
};
window.springEase = function (opts) {
var f = opts.feel ? FEELS[opts.feel] : opts;
var zeta = f.zeta,
response = f.response;
var w0 = (2 * Math.PI) / response;
var T = LN1000 / (zeta * w0);
var x;
if (zeta < 1) {
var wd = w0 * Math.sqrt(1 - zeta * zeta);
x = function (t) {
return (
1 -
Math.exp(-zeta * w0 * t) *
(Math.cos(wd * t) + ((zeta * w0) / wd) * Math.sin(wd * t))
);
};
} else {
x = function (t) {
return 1 - Math.exp(-w0 * t) * (1 + w0 * t);
};
}
var xT = x(T);
return {
ease: function (p) {
return p >= 1 ? 1 : x(p * T) / xT;
},
duration: T,
zeta: zeta,
response: response,
};
};
window.hwWobbleEllipse = function (cx, cy, rx, ry, seed, wobblePct) {
wobblePct = wobblePct === undefined ? 3 : wobblePct;
var N = 14,
pts = [];
for (var i = 0; i < N; i++) {
var a = (i / N) * Math.PI * 2;
var wr = 1 + window.hwHash(i * 13 + 5, seed) * (wobblePct / 100);
pts.push([cx + Math.cos(a) * rx * wr, cy + Math.sin(a) * ry * wr]);
}
var mx = (pts[0][0] + pts[N - 1][0]) / 2,
my = (pts[0][1] + pts[N - 1][1]) / 2;
var d = "M" + mx.toFixed(1) + " " + my.toFixed(1);
for (var j = 0; j < N; j++) {
var p = pts[j],
q = pts[(j + 1) % N];
d +=
" Q" +
p[0].toFixed(1) +
" " +
p[1].toFixed(1) +
" " +
((p[0] + q[0]) / 2).toFixed(1) +
" " +
((p[1] + q[1]) / 2).toFixed(1);
}
return d;
};
/* ---- stroke matrix (family runtime): plain | soft | sharp | spray ----
strokeType is a g09 variant control. Authored constants per type;
unknown value → default ("plain") + console error (bounded-controls
law). sharp = micro stroke-dasharray gaps (dry marker) — draw-on
must therefore ride a MASK clone (the visible dasharray never
animates). spray = index-seeded deterministic dots along the path
via hwHash: position a pure function of path parameter + seed; NO
feTurbulence anywhere.
Returns { draw: pathToDashAnimate, group: maskedGroupOrNull } */
window.hwStrokeTypes = {
plain: {},
soft: { blur: 0.6 },
sharp: { dash: [3.0, 1.55] }, // × stroke-width
spray: {
coreOpacity: 0.5,
coreBlur: 0.4,
density: 0.16,
scatter: 2.6,
rMin: 1.1,
rMax: 2.6,
},
};
window.hwStrokeApply = function (pathEl, type, opts) {
opts = opts || {};
var cfg = window.hwStrokeTypes[type];
if (!cfg) {
console.error('hw: unknown strokeType "' + type + '" — falling back to "plain"');
type = "plain";
cfg = window.hwStrokeTypes.plain;
}
var svg = pathEl.ownerSVGElement;
var ns = "http://www.w3.org/2000/svg";
var w = parseFloat(getComputedStyle(pathEl).strokeWidth) || 6;
if (type === "plain") return { draw: pathEl, group: null, type: type };
if (type === "soft") {
pathEl.style.filter = "blur(" + cfg.blur + "px)";
return { draw: pathEl, group: null, type: type };
}
// sharp + spray: wrap in a masked group, draw-on animates the mask clone
var id =
opts.id ||
"hwsm-" + Math.abs(Math.round(window.hwHash((opts.seed || 1) * 13.7, 5) * 1e6));
var defs = svg.querySelector("defs");
if (!defs) {
defs = document.createElementNS(ns, "defs");
svg.insertBefore(defs, svg.firstChild);
}
var mask = document.createElementNS(ns, "mask");
mask.setAttribute("id", id);
mask.setAttribute("maskUnits", "userSpaceOnUse");
var clone = document.createElementNS(ns, "path");
clone.setAttribute("d", pathEl.getAttribute("d"));
clone.setAttribute("fill", "none");
clone.setAttribute("stroke", "#fff");
clone.setAttribute(
"stroke-width",
w * (type === "spray" ? 2 + (cfg.scatter * 2) / w : 1.7),
);
clone.setAttribute("stroke-linecap", "round");
clone.setAttribute("stroke-linejoin", "round");
mask.appendChild(clone);
defs.appendChild(mask);
var group = document.createElementNS(ns, "g");
group.setAttribute("mask", "url(#" + id + ")");
pathEl.parentNode.insertBefore(group, pathEl);
group.appendChild(pathEl);
if (type === "sharp") {
pathEl.setAttribute(
"stroke-dasharray",
(cfg.dash[0] * w).toFixed(1) + " " + (cfg.dash[1] * w).toFixed(1),
);
} else {
// spray: faint core + seeded dots
pathEl.setAttribute("stroke-opacity", cfg.coreOpacity);
pathEl.style.filter = "blur(" + cfg.coreBlur + "px)";
var len = pathEl.getTotalLength();
var n = Math.round(len * cfg.density * (opts.densityScale || 1));
var seed = opts.seed || 1;
var dots = document.createElementNS(ns, "g");
for (var i = 0; i < n; i++) {
var t = Math.min(
1,
Math.max(0, (i + 0.5) / n + (window.hwHash(i * 7, seed) * 0.35) / n),
);
var pt = pathEl.getPointAtLength(t * len);
var pt2 = pathEl.getPointAtLength(Math.min(len, t * len + 0.5));
var tx = pt2.x - pt.x,
ty = pt2.y - pt.y;
var tl2 = Math.hypot(tx, ty) || 1;
var nx = -ty / tl2,
nyv = tx / tl2;
var off = window.hwHash(i * 7 + 1, seed) * (cfg.scatter + w * 0.55);
var r = cfg.rMin + Math.abs(window.hwHash(i * 7 + 2, seed)) * (cfg.rMax - cfg.rMin);
var c = document.createElementNS(ns, "circle");
c.setAttribute("cx", (pt.x + nx * off).toFixed(1));
c.setAttribute("cy", (pt.y + nyv * off).toFixed(1));
c.setAttribute("r", r.toFixed(2));
c.setAttribute("fill", getComputedStyle(pathEl).stroke);
dots.appendChild(c);
}
group.appendChild(dots);
}
return { draw: clone, group: group, type: type };
};
/* Draw-on across the stroke matrix: dash-animate whatever hwStrokeApply
says. (The pen-velocity ease variant rides the write-on item, not
this one.) */
window.hwDrawOn = function (tl, applied, at, dur, opts) {
opts = opts || {};
var p = applied.draw;
var len = p.getTotalLength();
// the draw target is always solid (plain/soft: the path itself; sharp/spray:
// 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.ease || "power2.inOut";
tl.set(p, { opacity: 1 }, at);
tl.to(
p,
{ strokeDashoffset: 0, duration: dur === undefined ? 0.7 : dur, ease: ease },
at,
);
};
// ---- hw-callout helpers (copy these too) ----
// Builds outline + scribble + connector + label inside the wrapper and
// stores the draw records + control poses hwCalloutOn consumes.
// opts — content (uncounted): scribble (bool), seed, label, connector (bool)
// controls (g09 — see the CONFIG block, the published-parameter
// list): labelAt, strokeType, boil
window.hwCalloutBuild = function (target, opts) {
opts = opts || {};
var seed = opts.seed || 1;
var el = document.querySelector(target);
var svg = el.querySelector("svg");
var vb = svg.getAttribute("viewBox").split(" ");
var W = parseFloat(vb[2]),
H = parseFloat(vb[3]);
var cx = W / 2,
cy = H / 2,
rx = W * 0.42,
ry = H * 0.36;
var outline = el.querySelector(".hw-co-outline");
outline.setAttribute("d", window.hwWobbleEllipse(cx, cy, rx, ry, seed, 4));
var scr = el.querySelector(".hw-co-scribble");
if (opts.scribble === false) {
scr.style.display = "none";
} else {
/* Denser rows so the zigzag reads as a scribbled hatch. At 6 rows
the near-horizontal runs dominate and it renders as stacked bars. */
var d = "",
rows = 11;
for (var i = 0; i < rows; i++) {
var t = (i + 0.5) / rows;
var yy = cy - ry + t * ry * 2;
var half = Math.sqrt(Math.max(0.05, 1 - Math.pow((yy - cy) / ry, 2)));
var xw = rx * half * 0.86;
var xa = cx - xw + window.hwHash(i * 7 + 2, seed) * 8;
var xb = cx + xw + window.hwHash(i * 7 + 3, seed) * 8;
d += (i === 0 ? "M " : " L ") + (i % 2 ? xa : xb).toFixed(1) + " " + yy.toFixed(1);
d +=
" L " +
(i % 2 ? xb : xa).toFixed(1) +
" " +
(yy + window.hwHash(i * 7 + 4, seed) * 4).toFixed(1);
}
scr.setAttribute("d", d);
}
var conn = el.querySelector(".hw-co-connector");
var label = el.querySelector(".hw-co-label");
// labelAt is a declared variant control — bounded: unknown value
// falls back to the default WITH a console error. Validated BEFORE
// the connector branch so a malformed value always logs, even when
// connector: false leaves the control inert.
var at = opts.labelAt || "right";
if (at !== "left" && at !== "right" && at !== "below") {
console.error('hw: unknown labelAt "' + at + '" — falling back to "right"');
at = "right";
}
var ex = null,
ey = null;
if (opts.connector === false) {
conn.style.display = "none";
} else {
var sx = at === "left" ? cx - rx : at === "below" ? cx : cx + rx;
var sy = at === "below" ? cy + ry : cy + ry * 0.35;
ex = at === "left" ? sx - 70 : at === "below" ? sx + 40 : sx + 70;
ey = sy + 55;
conn.setAttribute(
"d",
"M " +
sx.toFixed(1) +
" " +
sy.toFixed(1) +
" Q " +
((sx + ex) / 2 + window.hwHash(21, seed) * 14).toFixed(1) +
" " +
(sy + 46).toFixed(1) +
" " +
ex.toFixed(1) +
" " +
ey.toFixed(1),
);
label.style.left = (at === "left" ? ex - 180 : ex + 12) + "px";
label.style.top = ey - 24 + "px";
}
label.textContent = opts.label || "";
// strokeType control: OUTLINE + CONNECTOR take the texture (the
// scribble stays plain). Bounding lives inside hwStrokeApply.
var strokeType = opts.strokeType || "plain";
var idBase = (el.id || "hw-co") + "-sm";
el.__hwCo = {
rx: rx,
seed: seed,
boil: opts.boil || "calm",
// the label pops out of the connector tip (falls back to center
// when the connector anatomy is off)
popOrigin: ex === null ? "50% 50%" : ex.toFixed(1) + "px " + ey.toFixed(1) + "px",
draw: {
outline: window.hwStrokeApply(outline, strokeType, {
seed: seed,
id: idBase + "-outline",
}),
scribble:
opts.scribble === false ? null : window.hwStrokeApply(scr, "plain", { seed: seed }),
connector:
opts.connector === false
? null
: window.hwStrokeApply(conn, strokeType, {
seed: seed,
id: idBase + "-connector",
}),
},
};
};
// Draw sequence: outline -> scribble -> connector -> label pop, with
// the g21 contact squash on the shapes group at pop arrival. The boil
// pose registers here too — the host wires a position only.
window.hwCalloutOn = function (tl, target, at) {
var el = document.querySelector(target);
var co = el.__hwCo;
var t = at;
["outline", "scribble", "connector"].forEach(function (k) {
var rec = co.draw[k];
if (!rec) return;
var dur = k === "scribble" ? 0.55 : k === "connector" ? 0.35 : 0.7;
window.hwDrawOn(tl, rec, t, dur);
t += dur * 0.85;
});
// label pop: the pop ARRIVES WITH MOMENTUM (accelerating into
// contact) — the squash absorbs it; a settling back.out crosses
// scale 1.0 at ~zero speed and the computed squash is invisible
// (measured, not hand-picked)
var pop = el.querySelector(".hw-co-pop");
var popEase = gsap.parseEase("power2.in");
gsap.set(pop, { scale: 0.001, opacity: 0, transformOrigin: co.popOrigin });
tl.to(pop, { opacity: 1, duration: 0.08, ease: "none" }, t);
tl.to(pop, { scale: 1, duration: 0.3, ease: popEase, immediateRender: false }, t);
// arrival velocity in px of radial (rx) travel, measured at the
// FIRST crossing of 1.0 — a settling ease's end-slope is ~0 and is
// NOT the arrival velocity
var eps = 1e-4;
var pc = 1;
for (var k2 = 1; k2 <= 1000; k2++) {
if (popEase(k2 / 1000) >= 1) {
pc = k2 / 1000;
break;
}
}
var vPop =
((popEase(Math.min(pc + eps, 1)) - popEase(pc - eps)) / (2 * eps)) * (co.rx / 0.3);
var S = Math.min(0.08 * (Math.abs(vPop) / 2000), 0.25); // 0.08 = light drawn line tier
var rec2 = window.springEase({ feel: "snappy" });
var st = { s: 0 };
var deform = el.querySelector(".hw-co-deform");
gsap.set(deform, { transformOrigin: "50% 100%" });
// volume-preserving squash on the SHAPES wrapper only — the label
// rides the uniform-scale pop OUTSIDE the deform, so non-uniform
// scale never reaches glyphs. Read-back assertion enforces the law.
window.hwOnUpdate(tl, function () {
var along = 1 - st.s;
gsap.set(deform, { scaleY: along, scaleX: 1 / along });
var ax = parseFloat(gsap.getProperty(deform, "scaleX"));
var ay = parseFloat(gsap.getProperty(deform, "scaleY"));
if (Math.abs(ax * ay - 1) > 0.01)
console.error("hw volume law violated (callout): " + (ax * ay).toFixed(4));
});
// contact: squash in 2 frames, 1-frame hold, spring home (factory
// duration consumed verbatim)
tl.to(st, { s: S, duration: 2 / 30, ease: "power3.out" }, t + 0.3);
tl.to(st, { s: 0, duration: rec2.duration, ease: rec2.ease }, t + 0.3 + 3 / 30);
// boil control (family base) — x/y/rotation on the boil wrapper only
window.hwBoilPose(tl, el.querySelector(".hw-co-boil"), co.boil, { seed: co.seed });
};
window.hwCalloutOff = function (tl, target, at) {
tl.to(target, { opacity: 0, duration: 0.35, ease: "power2.in" }, at);
};
// ---- self-preview (shipped-default CONFIG) ----
window.hwCalloutBuild("#hw-co-demo", {
scribble: CONFIG.scribble,
seed: SEED,
label: CONFIG.label,
connector: CONFIG.connector,
labelAt: CONFIG.labelAt,
strokeType: CONFIG.strokeType,
boil: CONFIG.boil,
});
var tl = gsap.timeline({ paused: true });
window.hwCalloutOn(tl, "#hw-co-demo", 0.4);
window.hwCalloutOff(tl, "#hw-co-demo", 3.3);
tl.set("#hw-co-root", { visibility: "hidden" }, 3.98);
window.__timelines["hw-callout-circle"] = tl;
})();
</script>
</body>
</html>
handwritten annotation callout overlay.