Animation

v0.1 animations all compile to AnimationSpec → Track, seekable at any moment (call excepted).

Create

Stroke draws along arc length; fill strategy optional:

await scene.play(
  obj.create({
    duration: 2,
    easing: "cubicInOut",
    fill: { mode: "after-stroke-fade", overlap: 0.2 },
  }),
);

fill.mode	Behavior
none	Stroke only
with-stroke	Fill with stroke
after-stroke	Instant fill after stroke completes
after-stroke-fade	Fade in fill after stroke completes

Object is invisible before play (reveal starts at 0).

Fade / Move / Rotate / Scale

await scene.play(
  obj.fadeIn({ duration: 0.6 }),
  obj.moveTo(xy(2, 0), { duration: 1, easing: "quadOut" }),
  obj.rotateTo(Math.PI / 4, { duration: 0.8 }),
  obj.scaleTo(xy(1.5, 1.5), { duration: 0.5 }),
);

Morph

Default arc-length normalized interpolation; v0.2 also provides anchor, matching (part-key matching), and cross-fade fallback. See Morph and part matching.

import { morph, rectangle } from "@intermact/core";

await scene.play(
  morph(disk, rectangle({ width: 2, height: 1, style: { … } }), {
    duration: 1.2,
    strategy: "arc-length", // or "anchor" | "matching" | "cross-fade"
  }),
);

// Or RegisteredObject2D instance method
await scene.play(disk.morphTo(rectangle({ … }), { duration: 1.2 }));

At runtime, sampled contours are interpolated via geometryOverride; renderer prefers override.

Generic tween

obj.tween({ type: "reveal" }, 1, { duration: 2.5, easing: "cubicInOut" });

Related examples

• anim/create-fade-move
• anim/sequence-parallel-stagger
• anim/easing-gallery
• l1/basic-2d — Create + morph + seek