import { Camera, Mesh, Object3D, XRTargetRaySpace } from 'three';
import { ModelScene } from './ModelScene.js';
import { PlacementBox } from './PlacementBox.js';
export declare class XRMenuPanel extends Object3D {
    private panelMesh;
    private exitButton;
    private goalOpacity;
    private opacityDamper;
    constructor();
    createButton(label: string, options?: {
        width?: number;
        height?: number;
        fontSize?: number;
        textColor?: string;
        backgroundColor?: string;
        fontFamily?: string;
    }): Mesh;
    exitButtonControllerIntersection(scene: ModelScene, controller: XRTargetRaySpace): import("three").Intersection<Object3D<import("three").Object3DEventMap>> | undefined;
    updatePosition(camera: Camera, placementBox: PlacementBox): void;
    /**
     * Set the box's visibility; it will fade in and out.
     */
    set show(visible: boolean);
    /**
     * Call on each frame with the frame delta to fade the box.
     */
    updateOpacity(delta: number): void;
    dispose(): void;
}