import { BufferGeometry, Usage } from 'three';
import { PathPointList } from './PathPointList';
import type { IGeneratePathVertexDataOption, IPathGeometryOption } from './types';
export declare class PathGeometry extends BufferGeometry {
    /**
       * @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 | IPathGeometryOption, generateUv2?: boolean);
    _initByMaxVertex(maxVertex: number, generateUv2?: boolean): void;
    _initByData(pathPointList: PathPointList, options?: IGeneratePathVertexDataOption, usage?: Usage, generateUv2?: boolean): void;
    /**
     * Update geometry by PathPointList instance
     * @param {PathPointList} pathPointList
     * @param {Object} options
     * @param {Number} [options.width=0.1]
     * @param {Number} [options.progress=1]
     * @param {Boolean} [options.arrow=true]
     * @param {String} [options.side='both'] - "left"/"right"/"both"
     */
    update(pathPointList: PathPointList, options?: IGeneratePathVertexDataOption): void;
    _resizeAttribute(name: string, len: number): void;
    _resizeIndex(len: number): void;
    _updateAttributes(position: number[], normal: number[], uv: number[], uv2: number[], indices: number[]): void;
}