/**
Default progress indicator: rotating vrspace.org logo, 30 cm ahead, 5 cm below camera.
Always bounds to active camera, to ensure same look and function on PC, mobile and VR devices.
 */
export class LoadProgressIndicator {
    /** Initializes VRSpaceUI, loading logo geometry so it can be reused.
    Installs active camera listener on the scene.
    @param scene
    @param camera current camera to bind to
     */
    constructor(scene: any, camera: any);
    scene: any;
    camera: any;
    mesh: any;
    totalItems: number;
    currentItem: number;
    zeroRotation: any;
    angle: number;
    /** Debug log flag */
    debug: boolean;
    /** Whether progress of individual items should be tracked.
    Default true rotates the logo only when an item loads.
    False results in continous rotation.
    */
    trackItems: boolean;
    _init(): void;
    attachToCamera(): void;
    /** Add an item to be tracked. First item added shows the indicator and starts the animation.
    @param item an item to track
     */
    add(item: any): void;
    /** Remove an item, e.g. loaded file. Last item removed stops the animation and hides the indicator.
    @param item to remove
     */
    remove(item: any): void;
    /** Stops tracking individual items and runs contionous animation */
    animate(): void;
    animation: () => void;
    /**
    Call on load progress event.
    @param evt progress event
    @param item related item
    */
    progress(evt: any, item: any): void;
    _update(): void;
    log(something: any): void;
}