import { Interval } from './Interval.js';
export interface BoundedFloatFunction<C> {
    compute(c: C): number;
    range(): Interval;
}
export interface CubicSpline<C> extends BoundedFloatFunction<C> {
    range(): Interval;
    mapCoordinates(visitor: CubicSpline.CoordinateVisitor<C>): CubicSpline<C>;
}
export declare namespace CubicSpline {
    type CoordinateVisitor<C> = (f: BoundedFloatFunction<C>) => BoundedFloatFunction<C>;
    function fromJson<C>(obj: unknown, extractor: (obj: unknown) => BoundedFloatFunction<C>): Constant | MultiPoint<C>;
    class Constant implements CubicSpline<unknown> {
        private readonly value;
        constructor(value: number);
        compute(): number;
        range(): Interval;
        mapCoordinates(): this;
    }
    class MultiPoint<C> implements CubicSpline<C> {
        coordinate: BoundedFloatFunction<C>;
        locations: number[];
        values: CubicSpline<C>[];
        derivatives: number[];
        constructor(coordinate: BoundedFloatFunction<C>, locations?: number[], values?: CubicSpline<C>[], derivatives?: number[]);
        compute(c: C): number;
        mapCoordinates(visitor: CubicSpline.CoordinateVisitor<C>): CubicSpline<C>;
        addPoint(location: number, value: number | CubicSpline<C>, derivative?: number): this;
        range(): Interval;
        private static linearExtend;
    }
}
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