import { type Object3D } from "three";
/**
 * Makes an Object3D maintain a constant screen size regardless of camera distance.
 * Call once after creating the handle mesh — it hooks into onBeforeRender automatically.
 * @param obj The handle mesh to keep at constant screen size
 * @param baseSize The desired base scale (default 1)
 * @param scaleFactor Pixels-per-unit tuning factor (default 0.008)
 */
export declare function makeScreenSpaceHandle(obj: Object3D, baseSize?: number, scaleFactor?: number): void;
