import type { PerspectiveCamera, Sprite } from 'three';
export type HotspotClickHandler = (portalTo: string) => void;
/**
 * Handles click detection on hotspot sprites via raycasting.
 * Converts mouse/touch clicks to normalized device coordinates,
 * raycasts through the scene, and triggers navigation on hit.
 */
export declare class HotspotInteraction {
    private raycaster;
    private pointer;
    private camera;
    private getSprites;
    private onClick;
    private domElement;
    private cleanups;
    constructor(camera: PerspectiveCamera, domElement: HTMLElement, getSprites: () => Sprite[], onClick: HotspotClickHandler);
    /** Start listening for click events */
    attach(): void;
    /** Stop listening */
    detach(): void;
    dispose(): void;
}
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