import { IPoint, SplinePointSet } from '../point';
export declare abstract class SplineProcessor {
    protected _points: SplinePointSet;
    private _splineXSeries;
    constructor(width?: number);
    add(point: IPoint): void;
    remove(point: IPoint): void;
    lookup: () => number[];
    interpolate: (predicate: (point: IPoint) => void) => void;
    interpolateOne: (x: number) => number;
    protected _clampRatio: (ratio: number) => number;
    protected _clampPoint: (point: IPoint) => {
        x: number;
        y: number;
    };
}