import { ContextManager, Observable } from '@zcomponent/core';
import * as Zappar from '@zappar/zappar';
import { AnchorOnNewEvent, AnchorOnVisibleEvent, AnchorOnNotVisibleEvent } from '../../events/events';
import { Event } from '@zcomponent/core';
import { StaticGroup } from '../StaticObject3D';
export declare enum ImageTargetOrientation {
    Upright = "Upright",
    Flat = "Flat"
}
/**
 * @zfilegenerator Train image target
 * @url https://imagetrainer-staging.zap.works/?platform=mattercraft
 * @icon add_photo_alternate
 */
interface ImageTrackerConstructorProps {
    /**
     * The ".zpt" file to use as the target image. You can create ZPT files from PNG/JPEG images using the 'Train image target' option from the Mattercraft Project tab '+' menu.
     *
     * @zprop
     * @zvalues files *.+(zpt)
     * @zpriority 21
     */
    source: string;
    /**
     * To preview the target image in the editor, set this to true.
     * @zprop
     * @zdefault true
     */
    showPreviewDesignTime: boolean;
    /**
     * Should objects beneath the surface of the target image be masked.
     *
     * @zprop
     * @zdefault true
     */
    maskObjectsBeneathSurface: boolean;
}
/**
 * The Image Tracker node can detect and track a flat or curved image in 3D space.
 * This is great for building content that's augmented onto business cards, posters, magazine pages, bottles, etc.
 * @zcomponent
 * @zgroup AR
 * @zlabel three/Object3D/Group/Zappar/ImageTracker
 * @ztag three/Object3D/Group/Zappar/ImageTracker
 * @ztag three/Object3D/Group/Zappar/Anchor
 * @zparents three/Object3D/Group/Group
 * @zicon image_search
 */
export declare class ImageTracker extends StaticGroup {
    protected constructorProps: ImageTrackerConstructorProps;
    /**
     * This event is fired when a new anchor is seen for the first time.
     * @zprop
     */
    onAnchorNew: Event<[AnchorOnNewEvent<Zappar.ImageAnchor>]>;
    /**
     * This event is fired when an anchor is visible.
     * @zprop
     */
    onAnchorVisible: Event<[AnchorOnVisibleEvent<Zappar.ImageAnchor>]>;
    /**
     * This event is fired when an anchor is not visible.
     * @zprop
     */
    onAnchorNotVisible: Event<[AnchorOnNotVisibleEvent<Zappar.ImageAnchor>]>;
    /**
     * Whether to consider the image target to be upright or flat for the purposes of building and editing the content.
     *
     * 'Upright' is great for things that are likely to be vertical in the real world, such as posters or billboards.
     *
     * 'Flat' is great for things that are likely to be horizontal in the real world, such as graphics on the floor.
     *
     * @zprop
     * @zgroup ImageTracker
     * @zgrouppriority 100
     * @zdefault Upright
     */
    orientation: Observable<ImageTargetOrientation, never>;
    private _underlyingAnchor?;
    anchor?: Zappar.ImageAnchor;
    private seenAnchorIds;
    private _context;
    private _imageTrackerContext;
    private _imageAnchorContext;
    private _innerGroup;
    private _maskMesh;
    private _previewMesh;
    readonly designTimeAnchorOriginPosition: number[];
    constructor(ctx: ContextManager, constructorProps: ImageTrackerConstructorProps);
    private _load;
    private _updateEnabled;
    private _frame;
    dispose(): never;
}
export {};