import * as THREE from 'three';
import { Camera } from '../camera.js';
/**
 * The position of content placed in this group can be chosen by the user.
 *
 *  This class is not a tracker, but a group that can be added to a tracker group.
 */
export declare class WorldPlacementGroup extends THREE.Group {
    private camera;
    /**
     * While placing, the group will be rotated so the positive `z` axis points towards the camera.
     */
    faceCamera: boolean;
    /**
     * When `true` at runtime, the position of the contents of this group will be reset every frame to a point directly in front of the camera.
     */
    placementMode: boolean;
    /**
     * By default, with this parameter `false` the scale of the contents of this group is that of the parent group.
     * If set to `true`, this group will adjust the scale based on the height of the camera above the origin.
     */
    normalizeScale: boolean;
    constructor(camera: Camera);
    /**
     * Called internally by ground anchor group.
     */
    update(): void;
    private groundPlaneIntersection;
}