import { Point } from '../../../point';
export declare class CubicInterpolationSet {
    private _points;
    a: number[];
    b: number[];
    c: number[];
    d: number[];
    constructor(_points: Point[]);
    at(idx: number): {
        a: number;
        b: number;
        c: number;
        d: number;
    };
    private _interpolate;
    private _diffAxis;
}