import { type Scheduler } from '@underlying/core';
import type { Morph, MorphElement } from './morph';
/** The shape to morph toward: raw path data (`"M ..."`) or an element with a `d`. */
export type MorphCommandsTarget = string | {
    getAttribute(name: string): string | null;
};
export interface MorphCommandsOptions {
    scheduler?: Scheduler;
    /** Initial morph fraction, 0..1 (0 = original shape, 1 = target). Default 0. */
    from?: number;
    /** Spring to this fraction on creation. */
    to?: number;
}
/**
 * Command-preserving morph. Unlike `morph()` (which resamples both outlines into
 * a polyline), this parses both `d` strings into cubic segments, subdivides the
 * sparser shape so the two match anchor-for-anchor (de Casteljau, so original
 * corners stay sharp), aligns closed rings by rotation and winding, and
 * interpolates each anchor and control. The result is real curves with crisp
 * corners. Elliptical arcs (A) are converted to cubics; segments are divided by
 * arc length, correspondence is matched on centroid/scale-normalized anchors, and
 * subpaths pair by similarity (surplus pieces shrink to / grow from a point). The
 * fraction is a live Animatable - spring it, scrub it, grab it mid-morph.
 * `revert()` restores the original `d`. For arbitrary blobby shapes where corner
 * preservation does not matter, `morph()` (resampling) is the simpler fallback.
 */
export declare function morphCommands(element: MorphElement, target: MorphCommandsTarget, options?: MorphCommandsOptions): Morph;
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