import { type IPointLike } from '@visactor/vutils';
import type { ICurvedSegment, IGenSegmentParams, ISegPath2D } from '../../interface/curve';
export declare class CatmullRomClosed implements ICurvedSegment {
    private _lastDefined1?;
    private _lastDefined2?;
    context: ISegPath2D;
    protected startPoint?: IPointLike;
    lastPoint0?: IPointLike;
    lastPoint1?: IPointLike;
    constructor(context: ISegPath2D, alpha?: number, startPoint?: IPointLike);
    _alpha: number;
    _x: number;
    _y: number;
    _x0: number;
    _x1: number;
    _y0: number;
    _y1: number;
    _x2: number;
    _y2: number;
    _x3: number;
    _y3: number;
    _x4: number;
    _y4: number;
    _x5: number;
    _y5: number;
    _line: number;
    _point: number;
    _l01_a: number;
    _l12_a: number;
    _l23_a: number;
    _l01_2a: number;
    _l12_2a: number;
    _l23_2a: number;
    areaStart(): void;
    areaEnd(): void;
    lineStart(): void;
    lineEnd(): void;
    point(p: IPointLike): void;
    tryUpdateLength(): number;
}
export declare const genCatmullRomClosedSegments: (points: IPointLike[], alpha: number, params?: IGenSegmentParams) => ISegPath2D;