import { Sprite } from 'three';
import type { Scene } from 'three';
import type { TourPortal } from '@vizor-vr/shared';
export interface HotspotSprite {
    portal: TourPortal;
    sprite: Sprite;
}
/**
 * Renders 3D sprite labels for tour portal hotspots.
 * Positioned on the inside of the panoramic sphere at each portal's lat/lon.
 */
export declare class HotspotRenderer {
    private sprites;
    private scene;
    constructor(scene: Scene);
    /** Create sprite meshes for all portals and add to scene */
    setPortals(portals: TourPortal[]): void;
    /** Remove all hotspot sprites from scene */
    clear(): void;
    /** Get all current sprites (for raycasting) */
    getSprites(): Sprite[];
    dispose(): void;
    private createSprite;
    private roundRect;
}
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