import * as THREE from 'three';
import { ContextManager, Observable } from '@zcomponent/core';
import { StaticGroup } from '../StaticObject3D';
import * as Zappar from '@zappar/zappar';
/**
 * The Instant World Tracker node lets you track 3D content to a point chosen by the user in the room or immediate environment around them.
 * With this tracking type you could build a 3D model viewer that lets users walk around to view the model from different angles,
 * or an experience that places an animated character in their room.
 * @zcomponent
 * @zgroup AR
 * @zicon travel_explore
 * @zlabel three/Object3D/Group/Zappar/InstantTracker
 * @ztag three/Object3D/Group/Zappar/InstantTracker
 * @ztag three/Object3D/Group/Zappar/Anchor
 * @zparents three/Object3D/Group/Group
 */
export declare class InstantWorldTracker extends StaticGroup {
    private context;
    /**
     * Toggles the placement mode of the tracker.
     * @zprop
     * @zgroup Tracker
     * @zgrouppriority 21
     * @zdefault true
     */
    placementMode: Observable<boolean, never>;
    anchor: Zappar.InstantWorldAnchor;
    /**
     * Sets the point in the user's environment that the anchor tracks from.
     *
     * The parameters passed in to this function correspond to the X, Y and Z coordinates (in camera space) of the point to track.
     * Choosing a position with X and Y coordinates of zero, and a negative Z coordinate,
     * will select a point on a surface directly in front of the center of the screen.
     *
     * @zprop
     * @zgroup Tracker
     * @zgrouppriority 21
     * @zdefault [0, 0, -5]
     */
    cameraPreviewOffset: Observable<[number, number, number], never>;
    private _previewPlacementMesh;
    private _instantWorldTrackerContext;
    constructor(ctx: ContextManager, props: {}, parentForChildren?: THREE.Object3D);
    private _updateEnabled;
    private _frame;
    dispose(): never;
}
export declare class PlacementMesh extends THREE.Mesh<THREE.PlaneGeometry, THREE.MeshStandardMaterial> {
    constructor();
    dispose(): void;
}