export type BezierFunc = (x: number) => number;
/**
 * 创建一个Bezier曲线函数，默认从(0,0)到(1,1)
 * @param p1x
 * @param p1y
 * @param p2x
 * @param p2y
 * @returns {BezierFunc} 返回一个函数，接收x返回y
 */
export declare function cubicBezier(p1x: number, p1y: number, p2x: number, p2y: number): BezierFunc;
export declare namespace cubicBezier {
    var preset: (preset: Preset) => BezierFunc;
}
export type Preset = 'linear' | 'ease' | 'ease-in' | 'ease-out' | 'ease-in-out';