import { Usage } from 'three';
import { PathPointList } from './PathPointList';
import { PathGeometry } from './PathGeometry';
import type { IPathTubeGeometryOption } from './types';
export declare class PathTubeGeometry extends PathGeometry {
    /**
     * @param {object|number} initData - If initData is number, geometry init by empty data and set it as the max vertex. If initData is Object, it contains pathPointList and options.
     * @param {boolean} [generateUv2=false]
     */
    constructor(initData?: number, generateUv2?: boolean);
    _initByData(pathPointList: PathPointList, options: IPathTubeGeometryOption | undefined, usage: Usage, generateUv2: boolean): void;
    /**
     * Update geometry by PathPointList instance
     * @param {PathPointList} pathPointList
     * @param {Object} options
     * @param {Number} [options.radius=0.1]
     * @param {Number} [options.progress=1]
     * @param {Boolean} [options.radialSegments=8]
     * @param {String} [options.startRad=0]
     */
    update(pathPointList: PathPointList, options?: IPathTubeGeometryOption): void;
}