import { CircularArray } from "./circulararray.js";
type Vel = {
    dx: number;
    dy: number;
};
type WeightedVel = Vel & {
    dt: number;
};
type KineticCallback = (v: Vel) => any;
export declare class Kinetic {
    /** Velocities below this will be considered zero */
    minVelocity: number;
    /** How much velocity to lose per unit time, `ice [0 <=> 1] rubber` */
    friction: number;
    /** Velocity smoother, set its `.size` to modify smoothing */
    readonly smoothing: CircularArray<WeightedVel>;
    private lock;
    /** Starts kinetic smooth-scrolling.  The returned promise resolves when motion has ended. */
    startKinetics(): Promise<void>;
    /** Instantly halts any current motion */
    stopKinetics(): void;
    protected readonly callbacks: Set<KineticCallback>;
    /**
     * Adds a callback that will be called whenever the velocity changes.

     * You can remove it by calling `unsubscribe` on the return value.
     * @param cb - the callback
    */
    onVelocityChanged(cb: KineticCallback): {
        unsubscribe: () => boolean;
    };
}
export {};
//# sourceMappingURL=kinetic.d.ts.map