import * as THREE from 'three';
import { FaceTracker } from '../defaultpipeline.js';
/**
 * Loader for face tracking model data.
 * @see https://docs.zap.works/universal-ar/web-libraries/threejs/face-tracking/
 */
export declare class FaceTrackerLoader extends THREE.Loader {
    /**
     * Loads face tracking model data.
     * New THREE.js style signature (required by Loader base class)
     */
    load(url: string, onLoad: (data: FaceTracker) => void, onProgress?: (event: ProgressEvent<EventTarget>) => void, onError?: (err: unknown) => void): void;
    /**
     * Loads face tracking model data.
     * Original backward-compatible signature
     * @param customModel - A URL to, or ArrayBuffer of, model data.
     * @param onLoad - Callback which returns the FaceTracker once it's loaded.
     * @param onError - Callback which is called if there's an error loading the mesh.
     * @returns The FaceTracker.
     */
    load(customModel?: string | ArrayBuffer, onLoad?: (i: FaceTracker) => void, onProgress?: () => void, onError?: (message?: unknown) => void): FaceTracker;
    /**
     * @ignore
     */
    parse(): void;
}