import type { AnimationClip } from "./AnimationClip.ts";
/** Loop once and stop. */
export declare const LoopOnce = 2200;
/** Loop repeatedly. */
export declare const LoopRepeat = 2201;
/** Loop back and forth (ping-pong). */
export declare const LoopPingPong = 2202;
/** Playback state for a single AnimationClip on a root Node. */
export declare class AnimationAction {
    #private;
    enabled: boolean;
    weight: number;
    timeScale: number;
    time: number;
    loop: number;
    repetitions: number;
    clampWhenFinished: boolean;
    paused: boolean;
    _fadeTarget: number | undefined;
    _fadeDuration: number | undefined;
    _fadeElapsed: number | undefined;
    constructor(clip: AnimationClip, localRoot?: object | undefined);
    get clip(): AnimationClip;
    get localRoot(): object | undefined;
    play(): this;
    stop(): this;
    reset(): this;
    setLoop(mode: number, repetitions: number): this;
    setEffectiveWeight(weight: number): this;
    getEffectiveWeight(): number;
    /** Schedules weight to animate from 0 to 1 over duration seconds. */
    fadeIn(duration: number): this;
    /** Schedules weight to animate from 1 to 0 over duration seconds. */
    fadeOut(duration: number): this;
    /** Fades out another action while this one fades in. */
    crossFadeFrom(fadeOutAction: AnimationAction, duration: number, _warp?: boolean): this;
    /** Fades out this action while another fades in. */
    crossFadeTo(fadeInAction: AnimationAction, duration: number, _warp?: boolean): this;
    /** Called by Animator.update - exposed for internal use. */
    _update(delta: number): void;
}
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