import type { ReducedMotionOverride } from '../a11y/config';
import type { Simulation } from './simulation';
export interface SpringOptions {
    /** Per-animation override of the reduced-motion behavior. */
    reducedMotion?: ReducedMotionOverride;
    stiffness?: number;
    damping?: number;
    mass?: number;
    /** Initial velocity in units/s - handoff from a gesture (drag -> release). */
    velocity?: number;
    /** Rest requires |position - target| < restDelta... */
    restDelta?: number;
    /** ...AND |velocity| < restSpeed (units/s). */
    restSpeed?: number;
}
/** A spring whose target can be re-aimed in place: no Motion rebuild on a moving target (follow). */
export interface RetargetableSpring extends Simulation {
    retarget(target: number): void;
}
export declare function springSimulation(target: number, options?: SpringOptions): RetargetableSpring;
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