import { Camera, Object3D } from 'three';
export interface OverlayObject {
    element: HTMLElement;
    mesh: Object3D;
}
/**
 * Positions HTML elements over their corresponding 3D meshes using a single
 * CSS matrix3d transform per element.
 *
 * Ported from Three.js InteractionManager (three/addons/interaction/InteractionManager.js).
 * Math: viewport × projection × view × world × pixelToLocal
 */
export declare class HtmlOverlayRenderer {
    objects: OverlayObject[];
    canvas: HTMLCanvasElement | null;
    camera: Camera | null;
    private _cachedCssW;
    private _cachedCssH;
    connect(canvas: HTMLCanvasElement, camera: Camera): void;
    add(element: HTMLElement, mesh: Object3D): OverlayObject;
    remove(obj: OverlayObject): void;
    update(): void;
    disconnect(): void;
}
//# sourceMappingURL=htmlOverlayRenderer.d.ts.map