import { WorldTracker, WorldAnchor } from '@zappar/zappar';
import * as THREE from 'three';
import { Camera } from '../camera.js';
/**
 * A THREE.Group which attaches content to a point in the world as it moves around in the camera view.
 * @see https://docs.zap.works/universal-ar/web-libraries/threejs/world-tracking/
 */
export declare abstract class WorldTrackingAnchorGroup extends THREE.Group {
    private camera;
    readonly worldTracker: WorldTracker;
    anchor?: WorldAnchor;
    private status;
    /**
     * Constructs a new WorldTrackingAnchorGroup.
     * @param camera - A ZapparThree.Camera.
     * @param worldTracker - The world tracker which will be used.
     */
    constructor(camera: Camera, worldTracker: WorldTracker);
    private updatePose;
    updateMatrixWorld(force?: boolean): void;
    dispose(): void;
}